Detection device

Abstract

The utility model provides a detection device which comprises a gas generating device, a sealing cover and a pipeline, the gas generating 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 generate chemical reaction under preset conditions and generate detection gas. 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 provided by the utility model is simple in structure, generates a proper amount of detection gas under a preset condition in the use process, and can reduce the accident rate caused by gas leakage.

Description

Technical Field

[0001] The utility model belongs to the field of detecting the effectiveness of gas concentration detectors, and particularly relates to a detection device. Background Art

[0002] With the popularization of gas in urban life, gas safety supervision faces unprecedented challenges. Gas leakage accidents occur frequently. There may be false negatives due to poor performance or improper maintenance of gas concentration detectors (alarms), resulting in the inability to obtain information in the first time after a safety accident occurs. We need to contain the possible fire and explosion problems caused by gas leakage as much as possible in the initial stage of gas leakage, and ensuring the effectiveness of combustible gas concentration detectors (alarms) is the first line of defense after natural gas leakage.

[0003] Currently, the detection of gas detectors (alarms) in the market mostly relies on traditional methods - carrying cylinders of pure natural gas or diluted gas. During detection, a certain concentration of natural gas is released into the environment to test whether the combustible gas concentration detector has a response action to judge whether the gas concentration detector is effective. This method has a cumbersome detection process. At the same time, a gas analyzer and cylinders need to be carried. The cylinders are large in volume, and the volume of combustible gas carried is large. If gas leakage occurs during transportation, storage, and use, accidents are likely to occur. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a detection device, aiming to solve the problems that the cylinders for detecting the effectiveness of gas concentration detectors are large in volume, and the volume of combustible gas carried is large. If gas leakage occurs during the detection process, accidents are likely to occur.

[0005] To solve the above technical problem, in the first aspect, the utility model provides a detection device for detecting the effectiveness of a gas concentration detector, including:

[0006] A gas generating device, including a reaction container for containing chemical reactants and serving as a reaction site for the chemical reactants. The chemical reactants undergo a chemical reaction under preset conditions to generate a detection gas, and the detection gas is the same as the gas detected by the gas concentration detector;

[0007] A sealing cover for sealing 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 is connected to the sealing cover to conduct the detection gas generated in the reaction container to the sealing cover.

[0009] Further, the gas generating device includes a housing provided with a connection port, through which the reaction vessel passes, and the opening of the reaction vessel has the same orientation as the connection port.

[0010] Further, the reaction vessel is provided with a peripheral edge that surrounds the opening on its circumference, and the peripheral edge abuts against the edge of the connection port.

[0011] Further, the housing is provided with a receiving cavity for receiving the reaction vessel, and the volume of the receiving cavity is larger than that of the reaction vessel.

[0012] Further, the receiving cavity is provided with a plurality of heaters that surround the reaction vessel on its circumference.

[0013] Further, a groove is provided at the bottom of the housing, the opening of the groove faces downward, and a bottom edge is provided on the circumference of the groove, which is integrally formed with the housing wall.

[0014] Further, the housing is provided with a handle connected to the housing wall, and the handle is provided with an avoidance groove.

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

[0016] Further, the sealing cover is frustum-shaped, provided with a first connection port and a second connection port, the first connection port and the second connection port are oppositely arranged, and the area of the first connection port is smaller than that of the second connection port.

[0017] Further, the second connection port is provided with a drawstring, and tightening the drawstring is used to seal the second connection port.

[0018] A detection device of the present utility model includes a gas generating device, a sealing cover, and a pipeline. The gas generating device includes a reaction vessel for containing an appropriate amount of chemical reactants and serving as a reaction site for the chemical reactants. The chemical reactants undergo a chemical reaction under preset conditions to 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 that 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 to conduct the detection gas generated in the reaction vessel to the sealing cover. The detection device of the present utility model has a simple structure and generates an appropriate amount of detection gas under preset conditions during use only, which can reduce the accident rate caused by gas leakage. Description of the Drawings

[0019] Figure 1It is a schematic diagram of the overall structure of the detection device in the embodiment of the present utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the gas generation device in the embodiment of the present utility model;

[0021] Figure 3 It is a schematic assembly structure diagram of the gas generation device in the embodiment of the present utility model;

[0022] Figure 4 It is a flowchart of the detection method in the embodiment of the present utility model.

[0023] In the drawings, each reference numeral represents: 100, detection device; 1, gas generation device; 11, reaction vessel; 12, housing; 121, connection port; 122, accommodation cavity; 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 cord; 3, pipeline. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0027] Currently, the detection of gas detectors (alarms) in the market mostly relies on traditional methods - carrying cylinders of pure natural gas or diluted gas. During detection, a certain concentration of natural gas is released into the environment to test whether the combustible gas concentration detector responds to determine whether the gas concentration detector is effective. This method has a cumbersome detection process. At the same time, a gas analyzer and cylinders need to be carried. The cylinders are large in volume, and the volume of the combustible gas carried is also large. If gas leakage occurs during transportation, storage, and use, accidents are likely to happen.

[0028] To solve the above technical problems, the present utility model proposes a detection device 100. The detection device 100 has a simple structure and generates an appropriate amount of detection gas under preset conditions during only the use process, which can reduce the accident rate caused by gas leakage.

[0029] As shown in the Figure 1 appendix, it is the overall structural schematic diagram of the detection device 100 in the embodiment of the present utility model; as shown in the Figure 2 appendix, it is the cross-sectional structural schematic diagram of the detection device 100 in the embodiment of the present utility model; as shown in the Figure 3 appendix, it is the assembly structural schematic diagram of the detection device 100 in the embodiment of the present utility model. It can be seen from the figure that the detection device 100 of the present utility model includes a gas generation device 1, a sealing cover 2, and a pipeline 3. The gas generation device 1 includes a reaction container 11. The reaction container 11 is used to hold an appropriate amount of chemical reactants and serves as the reaction site for the chemical reactants. The chemical reactants undergo a chemical reaction under preset conditions and generate detection gas, which is the same as the gas detected by the gas concentration detector. The preset conditions include temperature, stirring, etc., and are determined according to the reaction conditions of the chemical reactants. The reaction container 11 can be reused, enabling multiple detections. Exemplarily, the reaction container 11 can be a test tube, a reaction kettle, etc. In this embodiment, the reaction container 11 is taken as an example of a test tube. The test tube is heat-resistant and easy to clean, and can be reused, saving resources.

[0030] The sealing cover 2 is used to seal the gas concentration detector, and the volume of the sealing cover 2 is larger than that of the gas concentration detector. Sealing the gas concentration detector means wrapping the gas concentration detector with the sealing cover 2 to form an air cavity 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 that of the gas concentration detector, and the volume of the air cavity formed by the sealing cover 2 needs to be larger than that 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, so that the gas concentration in the air cavity cannot be detected.

[0031] 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, guiding 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.

[0032] Through the above embodiments, the detection device 100 of the present utility model generates combustible gas through the gas generating device 1, avoiding the leakage of combustible gas when not in inspection, reducing the accident rate caused by gas leakage, and 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 utility model to detect the effectiveness of the gas concentration detector.

[0033] In some embodiments, the gas generating device 1 includes a housing 12. The housing 12 is provided with a connection port 121. The reaction container 11 passes through the connection port 121. The housing 12 can protect the reaction container 11 and provide reaction conditions for the reaction container 11. It can be made of heat-resistant materials such as metal or ceramic. The opening of the reaction container 11 has the same orientation as the connection port 121. In this way, it is convenient for the pipeline 3 to be connected to the opening of the reaction container 11. Along the height direction, the upper end of the housing 12 gradually approaches the connection port 121, and the outer diameter of the housing 12 gradually becomes smaller until it is the same size as the connection port 121. In this way, the upper end of the housing 12 is like an inverted funnel shape.

[0034] In some embodiments, the reaction container 11 is provided with a rim. The rim is arranged around the circumference of the opening and abuts against the edge of the connection port 121. When the rim 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 housing 12. The rim can prevent the reaction container 11 from completely falling into the housing 12. With this setting, the reaction container 11 can be taken off from the connection port 121, which is convenient for replacing and cleaning the reaction container 11.

[0035] In some embodiments, a rotating portion (not labeled in the figure) is provided at the edge of the connection port 121. When the reaction vessel 11 is inserted through the connection port 121, the rotating portion abuts against the reaction vessel 11. The rotating portion can rotate relative to the housing 12. When using the detection device 100, the rotating portion can be rotated, and the rotating portion drives the reaction vessel 11 to rotate, so that the chemical reactants in the reaction vessel 11 are turned over to come into contact and fully react.

[0036] In some embodiments, the housing 12 is provided with a receiving cavity 122 for receiving the reaction vessel 11, and the volume of the receiving cavity 122 is larger than that of the reaction vessel 11. The reaction vessel 11 is arranged in the container cavity, and the housing 12 can protect the reaction vessel 11 from being collided by other objects.

[0037] In some embodiments, the receiving cavity 122 is provided with a plurality of heaters 1221 for heating the reaction vessel 11 so that the chemical reactants in the reaction vessel 11 react to generate test gas. A socket is provided outside the housing 12, and the socket is connected to the heaters 1221 through a cable. When using the detection device 100 to detect the effectiveness of the gas concentration detector, the socket is connected to a power supply to supply power to the heaters 1221. The heaters 1221 convert electrical energy into heat energy to heat the reaction vessel 11. The heaters 1221 are arranged around the circumference of the reaction vessel 11. In this way, the temperature difference on the circumference of the reaction vessel 11 can be made smaller. A controller can be provided outside the housing 12. The controller is respectively connected to the socket and the heaters 1221 and is used to control the voltage or current supplied to the heaters 1221, so as to control the temperature of the heaters 1221 and achieve the purpose of adjusting the temperature of the reaction vessel 11.

[0038] Furthermore, a temperature sensor is provided inside the housing 12. The temperature sensor is connected to the controller. The temperature sensor transmits the temperature information inside the housing 12 to the controller, and the controller controls the voltage or current supplied to the heaters 1221 according to the temperature information, so as to control the reaction vessel 11.

[0039] In some implementations, the receiving cavity 122 is not provided with heaters 1221. When using the detection device 100 to detect the effectiveness of the gas concentration detector, the housing 12 is placed on the natural gas stove in the user's kitchen for heating, so that the temperature of the reaction vessel 11 rises, and the chemical reactants in the reaction vessel 11 react to generate reaction gas. In this way, there is no need to provide heaters 1221, and the production cost of the detection device 100 can be reduced.

[0040] In some embodiments, a groove 123 is provided at the bottom of the housing 12. The opening of the groove 123 faces downward, and a bottom edge 124 is provided on the peripheral side of the groove 123. The bottom edge 124 is integrally formed with the housing wall of the housing 12. When the heater 1221 is not provided in the accommodation cavity 122, 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 housing 12, and thus the heat generated by the flame can be better transferred to the housing 12, thereby increasing the temperature of the reaction container 11.

[0041] In some embodiments, the housing 12 is provided with a handle 125. The handle 125 is connected to the housing wall of the housing 12, and the handle 125 is provided with an avoidance groove 1251. The handle 125 facilitates the lifting of the housing 12, and thus the detection device 100. Especially when the temperature of the housing 12 is relatively high, direct contact with the housing 12 can be avoided.

[0042] On the basis of the design that the housing 12 is provided with the handle 125, the handle 125 is coated with a heat insulation layer. The heat insulation layer is at least one of a fiberglass layer, an asbestos layer, a rock wool layer, and a silicate layer. With such a design, heat transfer to the handle 125 can be avoided, preventing the temperature of the handle 125 from being too high and scalding the user.

[0043] In some embodiments, the sealing cover 2 is frustum-shaped. The frustum-shaped sealing cover 2 has a larger connection port 121, through which the gas concentration detector can be covered. The connection port 121 is larger and it is easy to 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 oppositely arranged, 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 through the second connection port 22. The first connection port 21 and the second connection port 22 are arranged at the positions of the upper and lower bottom surfaces of the frustum, so that gas can more easily move from the first connection port 21 into the air cavity formed by the sealing cover 2.

[0044] In some embodiments, the second connection port 22 is provided with a drawstring 23. 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. The second connection port 22 contracts. After the drawstring 23 is tightened, the second connection port 22 can be made to be in a substantially sealed state, so that the gas concentration detector is in a sealed space, thereby preventing the detection gas generated in the reaction container 11 from overflowing and ensuring the gas concentration in the closed space.

[0045] As shown in the appendix Figure 4As shown in the figure, the present utility model also provides a detection method, which is applied to the detection device 100 in any of the above embodiments. The above embodiments have described the structure of the detection device 100 in detail and will not be elaborated herein. For details, please refer to the detection device 100 in the above embodiments. The detection method includes the following steps.

[0046] S11: Obtain the volume of the reaction vessel 11, the volume of the pipeline 3, the detection amount, and the detection concentration;

[0047] S12: Determine the amount of the chemical reactant according to the volume of the reaction vessel 11, the volume of the pipeline 3, the detection amount, and the detection concentration;

[0048] S13: Put an appropriate amount of the chemical reactant into the reaction vessel 11, connect one end of the pipeline 3 to the opening of the reaction vessel 11, and connect the other end of the pipeline 3 to the sealing cover 2, and seal the gas concentration detector with the sealing cover 2;

[0049] S14: Place the reaction vessel 11 under preset conditions and record whether the gas concentration detector alarms.

[0050] Taking the gas concentration detector as a natural gas concentration detector as an example, the natural gas (natural gas is CH4) generated by the reaction vessel 11 needs to fill the gas cavities of the reaction vessel 11, the pipeline 3, and the sealing cover 2. Then, it is necessary to calculate the natural gas required to be accommodated by the reaction vessel 11, the pipeline 3, and the sealing cover 2 to avoid the gas generated by the reaction vessel 11 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 needs to be calculated. The detection amount refers to the consumption amount of the gas when the gas concentration detector detects the concentration of the gas. The following embodiments will give examples of the detection amount and will not be described in detail herein.

[0051] During the gas flow process, the remaining gas in the pipeline 3 can be regarded as the total volume of the pipeline 3. Assuming that the radius of the used pipeline 3 is r and the length is h, the remaining gas volume in the pipeline 3 is: V = πr 2h. Taking a catering user as an example, the alarm is installed at a position 30 cm away from the ceiling. According to the "Design Standard for Food Service Buildings" JGJ64-2017, the indoor net height of the kitchen area is not less than 2.5 m. Taking 3 m as an example, if a rubber hose with a diameter of 8 mm is used, the volume of the gas in the pipe at this time is 0.15 L. Taking the reaction vessel 11 as a test tube with a diameter of 2.83 cm and a height of 11.31 cm, the volume of the test tube is 0.071 L. Taking the detection amount of 0.279 L as an example, the volume of the gas required is 0.5 L. It should be noted that the sealing cover 2 can be made of plastic and can be deformed and shrunk, so the volume of the sealing cover 2 is not included in the calculation. If the sealing cover 2 can be fully inflated, the volume of the sealing cover 2 can also be included in the calculation. In this embodiment, the volume of the sealing cover 2 is not included in the calculation, but it does not mean that the volume of the sealing cover 2 cannot be calculated. In addition, since there is air in the pipeline 3 and the test tube itself, when gas is generated, before and after the chemical reactants in the reaction vessel 11 react, the gas volume in the pipeline 3, the test tube and the sealing cover 2 will be greater than the gas volume before the chemical reactants in the reaction vessel 11 react. Without calculating the sealing cover 2, the volume of the gas that the sealing cover 2 can hold can be used to hold the incremental gas. The effectiveness detection of the gas concentration detector means: detecting whether the gas concentration detector can give an effective alarm when the natural gas concentration is close to the lower limit of the preset concentration range. In this embodiment, the detected concentration is 3% by volume fraction, so the volume of natural gas that the reaction vessel 11 needs to generate is 0.015 liters.

[0052] The chemical reactants can include anhydrous sodium acetate and soda lime, and the proportion of sodium hydroxide in the soda lime is 25%. Then, under the environmental conditions of one standard atmosphere and 20 degrees Celsius, to prepare 0.015 liters of natural gas, approximately 0.0502 grams of anhydrous sodium acetate and 0.098 grams of soda lime (containing 25% sodium hydroxide) are required. Anhydrous sodium acetate and soda lime (with 25% sodium hydroxide content) cannot react at room temperature and need to be heated to about 350 °C.

[0053] In some embodiments, the detection amount 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 removed, and the opening of the syringe is placed about 3 cm below the probe of the gas concentration detector. The syringe is slowly pushed to release the test natural gas until the gas concentration detector alarms, and the gas scale used is recorded. The interval between each experiment is 2 - 3 minutes, and the gas volume in the syringe before each experiment is 500 ml. The experiment is repeated five times, and the detection amounts for each experiment are 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. The average value is used as the test gas amount required by the gas concentration detector itself, that is, the detection amount is 0.297 L. The steps of detecting the detection amount of the gas concentration detector can be experimented 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, so as to avoid users from obtaining the detection amount through repeated experiments, and the time for users to detect the effectiveness of the gas concentration detector can be reduced.

[0054] In some embodiments, in step S12, according to the volume of the reaction vessel 11, the volume of the pipeline 3, the detection amount, and the detection concentration, determining the amount of the chemical reactant includes:

[0055] S121: According to the volume of the reaction vessel 11, the volume of the pipeline 3, the detection amount, and the detection concentration, determining the required gas volume;

[0056] S122: Determining the amount of the chemical reactant according to the gas volume;

[0057] Wherein, the required gas volume is the product of the sum of the volume of the reaction vessel 11, the volume of the pipeline 3, and the detection amount and the detection concentration.

[0058] As exemplified in the above embodiment, using a rubber hose with an 8mm diameter, the volume of gas within the hose is 0.15L. Taking the reaction container 11 as a test tube with a diameter of 2.83cm and a height of 11.31cm, the test tube capacity is 0.071L. For a test volume of 0.279L, the required gas volume is 0.5L. The detection concentration is 3%, which tests the effectiveness of the gas concentration detector at a natural gas concentration of 3%, specifically whether the gas concentration detector sounds an alarm at a natural gas concentration of 3%. If the gas concentration detector sounds an alarm, it is effective at a natural gas concentration of 3%. If it does not sound an alarm, it is ineffective at a natural gas concentration of 3%, and the gas concentration detector can be replaced. Since the detection concentration setting of each gas concentration detector varies, the detection concentration can be determined based on actual conditions; this utility model does not limit the specific value of the detection concentration. The required gas volume is the product of 0.5L and 0.03, which is 0.015L. At standard atmospheric pressure and 20°C, producing 0.015 liters of natural gas requires approximately 0.0502 grams of anhydrous sodium acetate and 0.098 grams of soda lime (containing 25% sodium hydroxide). A natural gas concentration detector is typically found in a kitchen where a natural gas cooker is used. Therefore, heating conditions are readily available, and the outer flame temperature of a natural gas stove can reach 400°C to 500°C. This satisfies the conditions for the chemical reactants in reaction vessel 11 to produce natural gas.

[0059] 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 natural gas concentration detectors for detecting natural gas leaks are 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 result in 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 early 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 a natural gas leak.

[0060] In some embodiments, the usage 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) into the reaction vessel 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 vessel 11. Carry the detection device 100 to the test area. One end of a 3m long pipeline (rubber hose) is connected to the opening of the reaction vessel 11, and the other end is connected to the sealing cover 2. The sealing cover 2 will wrap the gas concentration detector. Place the housing 12 of the detection device 100 in the natural gas stove, and light the natural gas stove to heat the reaction vessel 11, so that the chemical reactants in the reaction vessel 11 react to produce natural gas. The natural gas is fully mixed with the air in the reaction vessel 11 and the pipeline 3, so that the natural gas concentration in the mixed gas reaches about 3%. During this process, observe whether the gas concentration detector alarms.

[0061] If a heater 1221 is provided inside the housing 12 of the detection device 100, there is no need to place the housing 12 on the natural gas stove for heating. Just connect the socket of the heater 1221 to the power supply directly. The detection device equipped with the heater 1221 can be tested in an environment without a natural gas stove, which is more convenient.

[0062] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A detection device, characterized in that, The detection device is used to detect the effectiveness of a gas concentration detector and includes: A gas generating device, including a reaction container, which is used to hold an appropriate amount of chemical reactants and serve as a reaction site for the chemical reactants; A sealing cover, which 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 is connected to the sealing cover, 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 includes a housing, the housing is provided with a connection port, the reaction container passes through the connection port, and the opening of the reaction container has the same orientation as the connection port.

3. The detection device according to claim 2, characterized in that, The reaction container is provided with a rim, the rim surrounds the periphery of the opening, and the rim abuts against the edge of the connection port.

4. The detection device according to claim 2, wherein The housing is provided with a receiving cavity, which is used to receive the reaction container, and the volume of the receiving cavity is larger than the volume of the reaction container.

5. The detection device according to claim 4, characterized in that, The receiving cavity is provided with a plurality of heaters, and the heaters surround the periphery of the reaction container.

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

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

8. The detection device according to claim 7, wherein The handle is coated with a heat insulation layer, and the heat insulation layer is at least one of a fiberglass layer, an asbestos layer, a rock wool layer, and a silicate layer.

9. The detection device according to claim 1, wherein The sealing cover is frustum-shaped, the sealing cover is provided with a first connection port and a second connection port, the first connection port and the second connection port are oppositely arranged, 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 drawstring, and the drawstring is tightened to seal the second connection port.

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