Sample calibration device for chemical alarm

Abstract

The embodiment of the present invention discloses a sample calibration device for a chemical alarm, including: a standard substance storage unit for storing standard substances for the chemical alarm; a chemical agent generating unit for generating a chemical agent standard sample of a set concentration; an industrial poison gas generating unit for generating an industrial poison gas standard sample of a set concentration; a filtering unit, which is respectively connected to the chemical agent generating unit and the industrial poison gas generating unit, and is used to process the generated tail gas; a control unit, which is configured to control the chemical agent generating unit to generate a chemical agent standard sample of a set concentration, and the industrial poison gas generating unit to generate an industrial poison gas standard sample of a set concentration. The generation of the chemical agent standard sample and the industrial poison gas standard sample are integrated in the same device, and the sample can be automatically provided. The device has a reasonable structure, a small size, and is easy to carry. It is suitable for high-efficiency and high-precision calibration of chemical alarms for field operations and mobile operations.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical detection, and in particular relates to a sample calibration device for a chemical alarm. Background Art

[0002] Generally, chemical alarms are devices that detect and alarm toxic and harmful gases in the environment. They are related to environmental safety and personnel safety. Accurate detection of toxic and harmful gases in the environment by chemical alarms is a prerequisite for making correct alarms. In order to ensure the accuracy of chemical alarm detection, chemical alarms need to be calibrated; calibration of chemical alarms usually requires the use of toxic and harmful gas samples with accurate concentrations. Therefore, providing standard samples with accurate concentrations at the calibration site of chemical alarms is one of the key factors for correct calibration of chemical alarms.

[0003] At the same time, since chemical alarms usually need to detect and alarm various types of gases such as chemical agents and industrial toxic and hazardous gases, it is necessary to provide standard samples of corresponding categories and types. Due to the large differences in the physical and chemical properties of different toxic and hazardous gases, different methods are usually used to prepare and provide standard samples, resulting in the need to use multiple devices and methods to provide standard samples during on-site calibration. The operation process is cumbersome, the logistics support pressure is high, and the calibration process takes a long time; moreover, the existing sample provision methods are mostly manual operations, and the accuracy and reliability of the methods are difficult to guarantee. The calibration reliability of chemical alarms needs to be improved. Summary of the invention

[0004] In view of this, some embodiments disclose a sample calibration device for a chemical alarm, comprising:

[0005] A standard substance storage unit, used for storing standard substances of chemical alarms;

[0006] A chemical agent generation unit, used to generate chemical agent standard samples of set concentrations;

[0007] Industrial poison gas generation unit, used to generate industrial poison gas standard samples of set concentration;

[0008] A filtering unit is arranged to be connected to the chemical agent generating unit and the industrial poison gas generating unit respectively, and is used to process the generated tail gas;

[0009] The control unit is configured to control the chemical agent generation unit to generate a chemical agent standard sample with a set concentration, and the industrial poison gas generation unit to generate an industrial poison gas standard sample with a set concentration.

[0010] Further, in some embodiments, the sample calibration device for a chemical alarm disclosed, the chemical agent generating unit comprises:

[0011] A gasification assembly configured to gasify chemical agent standard substances;

[0012] An automatic sampling component, used for automatically acquiring a set amount of chemical agent standard substance, and automatically conveying the acquired chemical agent standard substance to the gasification component;

[0013] A dilution gas source, used for providing dilution gas to the gasification component;

[0014] Among them, the chemical agent standard substance is gasified in the gasification component and forms a chemical agent standard sample of a set concentration with the dilution gas.

[0015] In some embodiments, a sample calibration device for a chemical alarm is disclosed, wherein the gasification component comprises:

[0016] A gasification chamber, wherein a top opening is arranged at the top of the gasification chamber, and a sealing cover is arranged at the opening; a heating component is arranged on the side wall of the gasification chamber, and a gasification chamber cover plate is arranged at the bottom of the gasification chamber;

[0017] An air inlet pipe is arranged on a side wall of the gasification chamber close to the top opening;

[0018] An exhaust pipe is arranged on a side wall of the gasification chamber close to the top opening and opposite to the exhaust port;

[0019] The spray air pipe is arranged inside the vaporization chamber and communicated with the top opening of the vaporization chamber. The bottom opening of the spray air pipe is communicated with the inside of the vaporization chamber.

[0020] Some embodiments disclose a sample calibration device for a chemical alarm, wherein the automatic sampling component comprises:

[0021] A sample supply platform for automatically supplying chemical agent standard substances;

[0022] The sampling and injection platform is adapted and installed with the sample providing platform, and is used to obtain the chemical agent standard substance from the sample platform and inject the sample into the vaporization chamber;

[0023] Among them, the sample provision platform includes:

[0024] A support plate; arranged horizontally to form a horizontal setting plane;

[0025] The rotating platform fixing plate is horizontally arranged and fixed on the supporting plate;

[0026] A rotating platform is arranged on the rotating platform fixing plate and is detachably connected to the rotating platform fixing plate;

[0027] A circular turntable is arranged on the rotating platform and is rotatably connected to the rotating platform; a square notch is arranged on one side of the circular turntable, and a plurality of grooves distributed at intervals are evenly arranged on the edge position of the upper surface of the circular turntable without the square notch, and the grooves are used to place reagent bottles of chemical agent labeling substances;

[0028] The reagent bottle fixing part is detachably mounted on the circular turntable; the reagent bottle fixing part comprises a plurality of extension parts radiating from the inside to the outside, and the extension parts are arranged above the groove on the circular turntable, and are used to fix the reagent bottle placed in the groove;

[0029] The sampling and injection platform includes:

[0030] Z-axis bracket;

[0031] A Z-axis slide is installed on the Z-axis bracket, and the Z-axis slide has a slide rail arranged in the Z-axis direction;

[0032] The slide adapter plate is arranged on the Z-axis slide and is movably connected to the slide rail;

[0033] The actuator is arranged and mounted on the slide adapter plate;

[0034] A motor, connected to the actuator, for driving the actuator to move along the slide rail;

[0035] The sampling needle base is arranged and installed on the actuator;

[0036] The sampling needle is arranged and installed on the sampling needle base; the sampling needle is arranged above the groove of the circular turntable.

[0037] Some embodiments disclose a sample calibration device for a chemical alarm, wherein the industrial poison gas generating unit comprises:

[0038] Standard gas source, used to store and provide industrial toxic gas standard gas;

[0039] A dilution gas source, used for storing and providing dilution gas;

[0040] A gas mixing component, arranged to be connected to a standard gas cylinder and a dilution gas source;

[0041] Among them, the industrial toxic gas standard gas and the dilution gas are arranged to be mixed in a gas mixing component to obtain the industrial toxic gas standard sample.

[0042] In the sample calibration device for a chemical alarm disclosed in some embodiments, the gas mixing component is a gas tube with a set length.

[0043] In a sample calibration device for a chemical alarm disclosed in some embodiments, a standard substance storage unit is arranged and installed on the inner side of a side wall of the sample calibration device, and the standard substance storage unit includes:

[0044] A test tube rack including a plurality of open chambers for setting standard substance reagent bottles;

[0045] The test tube rack cover is arranged at the top of the test tube rack and is used to press down the standard substance reagent bottle placed in the open chamber;

[0046] A connector, used for detachably connecting the upper cover of the test tube rack to the test tube rack;

[0047] Wherein, a transparent window is provided on the side wall of the standard substance storage unit.

[0048] In some embodiments, the sample calibration device for a chemical alarm disclosed herein, the filter unit comprises:

[0049] The filter housing has a cavity inside and an exhaust gas input port and an exhaust gas output port at the upper and lower ends;

[0050] The composite decontamination agent is arranged and filled in the cavity in the filter housing, and is used to decontaminate chemical agents or industrial poisonous gases in the exhaust gas;

[0051] The adsorbent is arranged and filled in the cavity of the filter housing and is used for adsorbing chemical poisons or industrial poisonous gases in the tail gas.

[0052] In some embodiments of the sample calibration device for a chemical alarm, the control unit includes an automatic sampling control module for controlling the automatic sampling component to achieve automatic sampling of chemical toxic agents.

[0053] Some embodiments disclose a sample calibration device for a chemical alarm, including an airflow stabilization sensor for detecting whether a generated chemical agent standard sample or an industrial toxic gas standard sample meets a set standard.

[0054] The sample calibration device for chemical alarms disclosed in the embodiment of the present invention integrates a chemical agent generation unit, an industrial toxic gas generation unit, a standard substance storage unit, a filtering unit, an exhaust gas purification unit and a display control unit, and integrates the generation of chemical agent standard samples and industrial toxic gas standard samples and exhaust gas treatment on the same device, can automatically complete the provision of samples, and realize automatic exhaust gas treatment. The device has a reasonable structure, a small size, and is easy to carry. It is suitable for calibrating chemical alarms for field operations and mobile operations, and is beneficial to improving the detection efficiency and detection accuracy of chemical alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 Example 1 Schematic diagram of the internal structure of a sample calibration device for a chemical alarm;

[0056] Figure 2Example 2 Schematic diagram of the external structure of a sample calibration device for a chemical alarm;

[0057] Figure 3 Schematic diagram of the composition of the automatic sampling assembly of Example 3;

[0058] Figure 4 Example 3 Sampling and injection platform composition diagram;

[0059] Figure 5 Example 3 Sample providing platform composition schematic diagram;

[0060] Figure 6 Schematic diagram of the composition of the gasification assembly of Example 4;

[0061] Figure 7 Example 4: Schematic diagram of the structure of the gasification assembly;

[0062] Figure 8 Example 5 Schematic diagram of the standard substance storage unit Figure 1 ;

[0063] Fig. 9 Example 5 Schematic diagram of the standard substance storage unit Figure 2 .

[0064] Reference numerals

[0065] 1 Sampling and injection platform 2 Base

[0066] 3 Sample supply platform 4 Control unit

[0067] 5 Filter unit 6 Standard material storage unit

[0068] 7 Airflow stability sensor 8 Exhaust gas purification unit

[0069] 9 Gasification assembly 10 Automatic sampling assembly base

[0070] 11 Z-axis bracket 12 Z-axis slide

[0071] 13 Slide adapter plate 14 Actuator unit

[0072] 15 Motor 16 Sampling needle base

[0073] 17 Sampling needle 18 Sampling needle base cover

[0074] 31 Support plate 32 Rotating platform fixing plate

[0075] 33 Rotating platform 34 Round turntable

[0076] 35 Reagent bottle fixing 341 Square notch

[0077] 351 extension 36 turntable motor

[0078] 37 Detachable connector 60 Test tube rack

[0079] 61 Open chamber 62 Test tube rack fixing hole

[0080] 63 Top cover fixing hole 64 Test tube rack top cover

[0081] 65 Connector 66 Reagent bottle

[0082] 91 Sealing cover 90 Internal cavity

[0083] 92 Vaporization chamber cover 93 Inlet pipe

[0084] 94 Exhaust pipe 95 Heating component cover

[0085] 96 spray air pipe 100 device outer shell

[0086] 101 handle 102 transparent window

[0087] 103 Outer shell lock 104 Standard air source DETAILED DESCRIPTION

[0088] The word "embodiment" used herein as an "exemplary" does not necessarily mean that any embodiment described is superior or better than other embodiments. Performance index tests in the embodiments of the present invention are performed using conventional test methods in the art unless otherwise specified. It should be understood that the terms described in the embodiments of the present invention are only used to describe specific implementation methods and are not intended to limit the contents disclosed in the embodiments of the present invention.

[0089] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which the embodiments of the present invention belong; other experimental methods and technical means not specifically specified in the embodiments of the present invention refer to experimental methods and technical means commonly used by ordinary technicians in the field.

[0090] The terms "substantially" and "approximately" used herein are used to describe small fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. The numerical data represented or presented in the range format herein are used only for convenience and brevity, and should therefore be flexibly interpreted as including not only the values ​​clearly listed as the limits of the range, but also all independent values ​​or sub-ranges contained in the range. For example, the numerical range of "1-5%" should be interpreted as including not only the clearly listed values ​​of 1% to 5%, but also the independent values ​​and sub-ranges within the range shown. Therefore, independent values ​​such as 2%, 3.5% and 4% and sub-ranges such as 1%-3%, 2%-4% and 3%-5% are included in this numerical range. This principle also applies to the range of only one numerical value. In addition, such an interpretation applies regardless of the width of the range or the characteristics described.

[0091] In this document, including in the claims, transitional words such as "comprises," "includes," "with," "having," "containing," "involving," "accommodating," etc. are understood to be open-ended, i.e., meaning "including but not limited to." Only the transitional words "consisting of" and "composed of" are closed transitional words.

[0092] In order to better illustrate the present invention, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that the present invention can be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the gist of the present invention.

[0093] Under the premise of no conflict, the technical features disclosed in the embodiments of the present invention may be arbitrarily combined, and the resulting technical solutions belong to the contents disclosed in the embodiments of the present invention.

[0094] In some embodiments, a sample calibration device for a chemical alarm comprises:

[0095] The standard substance storage unit is used to store the standard substances of the chemical alarm. The chemical poisons required for the calibration of the chemical alarm are usually loaded in reagent bottles that meet the regulations and used as standard substances. In order to ensure the safety of the standard substances and facilitate the use of the standard substances, the reagent bottles loaded with the standard substances are usually centrally managed and concentrated in the standard substance storage unit. The standard substance storage unit is usually set inside the sample calibration device to improve its safety.

[0096] A chemical agent generation unit, used to generate chemical agent standard samples of set concentrations;

[0097] Industrial poison gas generation unit, used to generate industrial poison gas standard samples of set concentration;

[0098] The filter unit is connected to the chemical agent generating unit and the industrial poison gas generating unit respectively, and is used to process the generated tail gas; usually, the filter unit is provided with materials for filtering and washing chemical agents and industrial poison gas, which can remove the waste gas generated by the generating unit and improve the operation safety; further, the tail gas purification unit can be provided to further purify the tail gas treated by the filter unit to ensure the operation safety;

[0099] The control unit is configured to control the chemical agent generating unit to generate a set concentration of chemical agent standard samples, and the industrial gas generating unit to generate a set concentration of industrial gas standard samples. Usually, the control unit controls the chemical agent generating unit, and the industrial gas generating unit automatically operates, thereby improving the degree of automation of the operation process, improving the operation efficiency, and the operation accuracy; for example, the sampling, injection, and gasification of the chemical agent generating unit, as well as the detection of whether the generated labeled samples meet the set standards, etc. can be automatically performed under the control of the control unit, thereby improving the standardization of the sampling and injection process, and ultimately improving the operation accuracy of the calibration device.

[0100] In some embodiments, the chemical agent generating unit comprises:

[0101] The gasification component is used to gasify the chemical agent standard substance; usually the chemical agent is in liquid form, and the liquid substance needs to be gasified to obtain the standard gas that meets the requirements;

[0102] An automatic sampling component, used for automatically acquiring a set amount of chemical agent standard substance, and automatically conveying the acquired chemical agent standard substance to the gasification component;

[0103] The dilution gas source is used to provide dilution gas to the gasification component; wherein the chemical agent standard substance is gasified in the gasification component to form a chemical agent standard sample of a set concentration with the dilution gas.

[0104] Usually, the gasification process of chemical agent standard substances needs to be carried out with the assistance of a gas source to improve the gasification efficiency. At the same time, the chemical agent standard substances need to be diluted to obtain chemical standard samples that meet the specified concentration and control the concentration of the chemical agent standard samples within a constant range. Usually, the dilution gas source is nitrogen with a certain pressure, which is provided in the form of a nitrogen gas cylinder and is set at a suitable position of the calibration device, such as the outside of the side wall of the calibration device. The nitrogen gas cylinder is fixed by a fixing component, and auxiliary components such as a pressure reducing valve and a pressure gauge are set to complete the reasonable use of the dilution gas source.

[0105] In some embodiments, the gasification assembly includes:

[0106] A gasification chamber, wherein a top opening is arranged at the top of the gasification chamber, and a sealing cover is arranged at the opening; a heating component is arranged on the side wall of the gasification chamber, and a gasification chamber cover plate is arranged at the bottom of the gasification chamber;

[0107] An air inlet pipe is arranged on a side wall of the gasification chamber close to the top opening;

[0108] An exhaust pipe is arranged on a side wall of the gasification chamber close to the top opening and opposite to the exhaust port;

[0109] The spray air pipe is arranged inside the vaporization chamber and communicated with the top opening of the vaporization chamber. The bottom opening of the spray air pipe is communicated with the inside of the vaporization chamber.

[0110] In some embodiments, the automatic injection component includes:

[0111] A sample supply platform for automatically supplying chemical agent standard substances;

[0112] The sampling and injection platform is adapted and installed with the sample providing platform, and is used to obtain the chemical agent standard substance from the sample platform and inject the sample into the vaporization chamber;

[0113] The sample providing platform comprises: a support plate; a horizontal arrangement to form a horizontal arrangement plane; a rotating platform fixing plate, which is horizontally arranged and fixed on the support plate; a rotating platform, which is arranged on the rotating platform fixing plate and is detachably connected to the rotating platform fixing plate; a circular turntable, which is arranged on the rotating platform and is rotatably connected to the rotating platform; a square notch is arranged on one side of the circular turntable, and a plurality of grooves distributed at intervals are evenly arranged on the edge position of the upper surface of the circular turntable without the square notch, and the grooves are used to place reagent bottles of chemical agent labeling substances; a reagent bottle fixing part, which is detachably arranged and installed on the circular turntable; the reagent bottle fixing part comprises a plurality of extension parts radiating from the inside to the outside, and the extension parts are arranged above the grooves on the circular turntable, and are used to fix the reagent bottles placed in the grooves;

[0114] The sampling and injection platform includes: a Z-axis bracket; a Z-axis slide, which is arranged and installed on the Z-axis bracket, and the Z-axis slide has a slide rail arranged in the Z-axis direction; a slide adapter plate, which is arranged on the Z-axis slide and is movably connected to the slide rail; an actuator, which is arranged and installed on the slide adapter plate; a motor, which is arranged and connected to the actuator and is used to drive the actuator to move along the slide rail. The motor can adopt a linear screw stepper motor. A linear screw stepper motor with high pulse and good stability helps to achieve the accuracy of sample acquisition or injection; a high-precision screw is also provided to match the stepper motor, which is arranged to drive the actuator to move along the slide rail under the drive of the stepper motor, and further drives the sampling needle to move; a servo motor can also be selected; a sampling needle base, which is arranged and installed on the actuator; a sampling needle, which is arranged and installed on the sampling needle base, and the sampling needle is arranged above the groove of the circular turntable. Usually, the up and down movement and positioning of the sampling needle are controlled by a stepper motor, and the multiple controls of the precise positioning of the sampling needle are realized by means of the step length of the stepper motor and the positioning of the matching sensor. Under the control of the device control component, the reasonable coordination of the sampling and injection process is realized, and the strict timing control, logic control, and position accuracy control of the process are realized; for example, determining the initial state of the sampling needle, positioning the reagent bottle number, positioning the injection port, sample quantification, injection, cleaning the sampling needle, etc.

[0115] In some embodiments, the industrial poison gas generating unit includes: a standard gas source, which is used to store and provide industrial poison gas standard gas; commonly used industrial poison gases include chlorine, sulfur dioxide, nitrogen dioxide, hydrogen sulfide, benzene, etc., and the standard gas source usually refers to providing these industrial poison gases in the form of standard gas cylinders to meet the requirements of the calibration device for gas supply volume, gas supply concentration, volume, weight, etc.; a dilution gas source, which is used to store and provide dilution gas; usually the standard gas source needs to be mixed with the dilution gas source, and the standard gas source is diluted. After dilution by a certain multiple, an industrial poison gas standard sample for chemical alarm calibration is obtained; usually the dilution gas source is nitrogen with a certain pressure, and nitrogen is used as the dilution gas source. The calibration device is provided in the form of a nitrogen cylinder, which is arranged at a suitable position of the calibration device, such as the outside of the side wall of the calibration device. The nitrogen cylinder is fixed by a fixing component, and auxiliary components such as a pressure reducing valve and a pressure gauge are provided to achieve the rational use of the dilution gas source. Generally, the dilution gas source used to dilute the chemical agent standard substance can share the same dilution gas source with the dilution gas source used to dilute the industrial toxic gas standard substance, thereby reducing the weight of the calibration device and simplifying the structure of the calibration device. A gas mixing component is arranged to be connected to the standard gas cylinder and the dilution gas source. The industrial toxic gas standard gas and the dilution gas are arranged to be mixed in the gas mixing component to obtain an industrial toxic gas standard sample.

[0116] Generally, the standard gas and the dilution gas are mixed in the gas mixing component to obtain a uniformly mixed standard sample; usually, the gas mixing is carried out in the gas pipeline. Based on the requirements of rapid gas mixing and simple structure, the gas pipeline can be used for direct mixing. By setting the length of the gas pipeline, the residence time of the mixed gas in the pipeline can be controlled to achieve the purpose of mixing. Usually, the gas pipeline for gas mixing forms a coil with a certain diameter to save space, and the residence time of the gas can be calculated based on the gas flow rate and pipe diameter.

[0117] In some embodiments, the standard substance storage unit is arranged and installed on the inner side of the side wall of the sample calibration device, and the standard substance storage unit includes: a test tube rack, including a plurality of open chambers for setting standard substance reagent bottles; a test tube rack cover, arranged on the top of the test tube rack, for pressing the standard substance reagent bottles placed in the open chamber; a connector, for detachably connecting the test tube rack cover to the test tube rack; wherein a transparent window is opened on the side wall where the standard substance storage unit is set.

[0118] In some embodiments, the filter unit includes: a filter housing having a cavity therein and having an exhaust gas input port and an exhaust gas output port at the upper and lower ends; a composite disinfectant arranged and filled in the cavity in the filter housing for disinfecting chemical agents or industrial toxic gases in the exhaust gas; and an adsorbent arranged and filled in the cavity in the filter housing for adsorbing chemical agents or industrial toxic gases in the exhaust gas.

[0119] In some embodiments, the control unit includes an automatic injection control module for controlling the automatic injection component to achieve automatic injection of chemical agents.

[0120] In some embodiments, the sample calibration device for the chemical alarm includes an airflow stabilization sensor for detecting whether the generated chemical agent standard sample or industrial toxic gas standard sample meets the set standard. Usually, the generated chemical agent standard sample or industrial toxic gas standard sample is detected by the airflow stabilization sensor before being used for calibration of the chemical alarm to ensure that the output standard sample meets the set standard and maintains a stable state during the calibration process; for example, a photoionization gas sensor (PID sensor) can be used to measure the generated standard sample.

[0121] In some embodiments, the control component includes an automatic sampling control module, which uses an embedded processor to power the mass flow meter and perform serial communication, set the mass flow meter online, control the sampling and injection platform and the sample providing platform, control the heating treatment process of the vaporization chamber, and can also cool the vaporized liquid. It can receive real-time temperature data from the heating and cooling modules, can communicate with the screen through the serial port, can control the solenoid valve to switch the gas path, and can communicate externally through the RS232 interface to realize remote control operation functions.

[0122] In some embodiments, the circuit main controller adopts STM32 series chips, and the specific model of the main processor is: STM32F407ZGT6.

[0123] The technical details are further illustrated below in conjunction with embodiments.

[0124] Example 1

[0125] Figure 1 This is a schematic diagram of the internal structure of the sample calibration device for a chemical alarm disclosed in Example 1.

[0126] In Example 1, the sample calibration device for a chemical alarm includes a base 2, which is usually arranged inside the outer shell of the device; a sampling and injection platform 1 is arranged on the base 2, and a sample providing platform 3 installed on the base 2 is adapted to be installed with the sampling and injection platform 1 so that the two can cooperate to perform automatic sampling and injection; a control unit 4, a filtering unit 5 and an exhaust gas purification unit 8 are also arranged on the base 2, and an airflow stabilization sensor 7 is installed on the inner side wall of the outer shell of the device.

[0127] Example 2

[0128] Figure 2 This is a schematic diagram of the external structure of the sample calibration device for a chemical alarm disclosed in Example 2.

[0129] In Example 2, the sample calibration device for chemical alarm includes a device outer shell 100, a handle 101 is provided in the middle of the front side panel of the outer shell, a standard gas source 104 and pressure valves, pressure gauges and other components matching the standard gas source 104 are externally mounted below the handle 101; a transparent window 102 is provided on the left side panel of the standard gas source 104, which is matched with the standard material storage unit inside; a display panel 105 is provided above the transparent window 102 to display the status information of the device in real time. An outer shell lock 103 is provided on the side panel of the device outer shell.

[0130] Example 3

[0131] Figure 3 This is a schematic diagram of the composition of the automatic sampling component of the sample calibration device for a chemical alarm disclosed in Example 3. Figure 4 It is a schematic diagram of the sampling and injection platform. Figure 5 is a schematic diagram of a sample providing platform;

[0132] In Example 3, the automatic sampling assembly includes a sample providing platform 3 and a sampling and injection platform 1, which are adapted and installed on the automatic sampling assembly base 10;

[0133] The sampling and injection platform includes a Z-axis bracket 11, which includes a horizontal flat plate and a vertical support plate. The horizontal flat plate is arranged on the automatic injection component base 10, and the vertical support plate is perpendicular to the automatic injection component base 10 to form a Z-axis direction support plate; the Z-axis slide 12 is fixedly installed on the vertical support plate of the Z-axis bracket 11, and the Z-axis slide 12 is provided with a slide track arranged in the Z-axis direction, the slide adapter plate 13 is arranged to be movably connected to the slide track, and the actuator 14 is fixedly installed on the slide On the adapter plate 13, a motor 15 is arranged at the top of the Z-axis slide 12, and the motor 15 is arranged to be connected with a linear screw, and the linear screw is arranged to be connected with the actuator 14; a sampling needle base 16 is arranged and fixed on the side of the actuator 14, and a sampling needle 17 is arranged and installed below the sampling needle base 16, and a sampling needle base cover plate 18 is arranged on the sampling needle base 16, and the sampling needle base cover plate 18 is arranged to be connected with the sampling needle base 16 by a hinge, so that the sampling needle base cover plate 18 can be opened to replace or load the sampling needle 17;

[0134] The sample providing platform 3 includes two support plates 31 arranged in parallel and mounted on the base 10 of the automatic sampling assembly. A rotating platform fixing plate 32 is arranged on the support plate 31, and a rotating platform 33 is arranged on the rotating platform fixing plate 32. A turntable motor 36 is arranged on the side of the rotating platform, and a circular turntable 34 rotatably connected to the rotating platform 33 is arranged on the rotating platform 33. The circular turntable 34 is arranged to rotate with its center as the axis under the drive of the turntable motor 36; a square notch 341 is arranged on the side of the circular turntable 34, and a plurality of grooves are arranged on the circular turntable 34. The grooves are evenly spaced along the edge of the circular turntable 34, and the grooves are used to place reagent bottles; a reagent bottle fixing part 35 is arranged above the circular turntable 34; the reagent bottle fixing part 35 has an overall shape The shape is consistent with the circular turntable with a square notch so that the two can be adapted and installed; the reagent bottle fixing part 35 includes a circular central area and a plurality of extensions 351 radiating outward from the central area, and the ends of the extensions 351 are arranged to correspond to the grooves on the circular turntable 34 so as to press the reagent bottle arranged in the grooves; the ends of the extensions 351 are horizontally arranged as a whole in the form of a circular ring, and the central hollow area of ​​the circular ring is located directly above the reagent bottle so that the sampling needle can pass through the circular ring and enter the reagent bottle for sampling; a mounting hole is arranged in the center of the reagent bottle fixing part 35 so that the reagent bottle fixing part 35 can be detachably connected to the rotating platform by a detachable connecting part 37; the detachable connecting part 37 is easy to disassemble so as to replace or load the reagent bottle in the groove.

[0135] Example 4

[0136] Figure 6 This is a schematic diagram of the composition of the gasification assembly disclosed in Example 4. Figure 7 It is a schematic diagram of the gasification component structure;

[0137] In Example 4, the gasification component 9 is a square component, and an internal cavity 90 is provided inside. The internal cavity 90 is connected to the upper and lower ends of the gasification component 9. A sealing cover 91 is provided at the upper port of the gasification component 9, and a gasification chamber cover plate 92 is provided at the bottom of the gasification component 9 to seal the lower port. At the same time, both sides of the gasification chamber cover plate 92 are extended outside the gasification component 9, and the extended part is provided with a mounting hole to install the gasification component 9 in the sample calibration device at a position adapted to the sampling needle, so that the sampling needle can inject the acquired sample into the gasification chamber component for gasification;

[0138] Two through holes are provided on two opposite sides of the gasification component 9 to communicate with the internal cavity 90 thereof. The through holes are located at one end of the sealing cover of the gasification component 9. One through hole is connected to an air inlet pipe 93, and the other through hole is connected to an exhaust pipe 94.

[0139] The internal cavity 90 of the gasification assembly 9 is provided with a spray air pipe 96, one end of which is arranged to communicate with the upper end of the internal cavity and is located below the air inlet pipe 93, so that the dilution gas introduced from the air inlet pipe 93 can bring the poison sample injected from the sealing cover into the spray air pipe 96 for atomization; the other end of the spray air pipe 96 is arranged at the bottom of the internal cavity and is communicated with the internal cavity, so that the atomized sample in the spray air pipe 96 enters the internal cavity and further enters the exhaust pipe 94 communicated with the internal cavity 90;

[0140] During operation, the sampling needle passes through the sealing cover to inject the poison sample into the internal cavity 90 of the gasification component. Figure 7 The dilution gas flows from the air inlet pipe 93 into the internal cavity 90 in the direction indicated by the dashed arrow. Figure 7 In the direction indicated by the solid arrow, the dilution gas intake direction is perpendicular to the poison sample injection direction;

[0141] The poison sample is atomized in the atomizing air pipe under the action of the dilution gas, continues to move along the atomizing air pipe into the bottom of the internal cavity, then returns and moves upward from the cavity outside the atomizing air pipe and flies out of the exhaust pipe. In such an extended atomization path, the poison sample is fully atomized and vaporized to form a uniform poison gas sample.

[0142] Example 5

[0143] Figure 8 Schematic diagram of the standard substance storage unit disclosed in Example 5 Figure 1 , Fig. 9 Schematic diagram of the standard material storage unit Figure 2 ;

[0144] In Example 5, the standard substance storage unit includes a test tube rack 60, on which a plurality of open chambers 61 arranged side by side are provided, the main body of the open chamber 61 is located inside the test tube rack 60, so that the toxic agent sample reagent bottle can be placed in the open chamber 61, and at the same time, the side of the open chamber 61 is open so that the inside of the reagent bottle can be observed; the top of the open chamber 61 is open so that the reagent bottle 66 can be placed into the open chamber 61 from the top opening; upper cover fixing holes 63 are provided at both ends of the top of the test tube rack 60, and a test tube rack upper cover 64 is provided on the top of the test tube rack 60 to press the reagent bottle 66 in the open chamber 60; the test tube rack upper cover 64 is detachably connected to the upper part of the test tube rack 60 through a connector 65;

[0145] Test tube rack fixing holes 62 are also provided at both ends of the test tube rack 60 so as to fix the test tube rack 60 on the inner wall of the device housing.

[0146] The sample calibration device for chemical alarms disclosed in the embodiment of the present invention integrates a chemical agent generation unit, an industrial toxic gas generation unit, a standard substance storage unit, a filtering unit, an exhaust gas purification unit and a display control unit, and integrates the generation of chemical agent standard samples and industrial toxic gas standard samples and exhaust gas treatment on the same device, can automatically complete the provision of samples, and realize automatic exhaust gas treatment. The device has a reasonable structure, a small size, and is easy to carry. It is suitable for calibrating chemical alarms for field operations and mobile operations, and is beneficial to improving the detection efficiency and detection accuracy of chemical alarms.

[0147] The technical solutions disclosed in the embodiments of the present invention and the technical details disclosed in the embodiments are merely illustrative of the inventive concept of the present invention and do not constitute a limitation on the technical solutions of the embodiments of the present invention. Any conventional changes, replacements or combinations of the technical details disclosed in the embodiments of the present invention have the same inventive concept as the present invention and are within the protection scope of the claims of the present invention.

Claims

1. A sample calibration device for a chemical alarm, characterized in that: include: A standard substance storage unit, used for storing standard substances of chemical alarms; A chemical agent generation unit, used to generate chemical agent standard samples of set concentrations; The chemical agent generating unit comprises: A gasification component is configured to gasify a chemical agent standard substance; the gasification component comprises: A gasification chamber, wherein a top opening is provided at the top of the gasification chamber, and a sealing cover is provided at the opening; a heating component is provided on the side wall of the gasification chamber, and a gasification chamber cover plate is provided at the bottom of the gasification chamber; An air inlet pipe is arranged on a side wall of the gasification chamber close to the top opening; An exhaust pipe is arranged on a side wall of the gasification chamber close to the top opening and opposite to the exhaust port; A spray air pipe is arranged inside the vaporization chamber and is connected to the top opening of the vaporization chamber, and a bottom opening of the spray air pipe is connected to the inside of the vaporization chamber; An automatic sampling component is used to automatically obtain a set amount of chemical agent standard substance and automatically transport the obtained chemical agent standard substance to the gasification component; the automatic sampling component includes: A sample supply platform for automatically supplying chemical agent standard substances; A sampling and injection platform, adapted and installed with the sample providing platform, for obtaining chemical agent standard substances from the sample providing platform and injecting the substances into the gasification chamber; Wherein, the sample providing platform comprises: A support plate; arranged horizontally to form a horizontal setting plane; A rotating platform fixing plate, horizontally arranged and fixed on the supporting plate; A rotating platform, disposed on the rotating platform fixing plate and detachably connected to the rotating platform fixing plate; A circular turntable is arranged on the rotating platform and is rotatably connected to the rotating platform; a square notch is arranged on one side of the circular turntable, and a plurality of grooves distributed at intervals are evenly arranged on the edge position of the upper surface of the circular turntable without the square notch, and the grooves are used to place sample reagent bottles of chemical agent labeling substances; A reagent bottle fixing part is detachably mounted on the circular turntable; the reagent bottle fixing part comprises a plurality of extensions radiating from the inside to the outside, the extensions are arranged above the grooves on the circular turntable, and are used to fix the reagent bottles placed in the grooves; The sampling and injection platform comprises: Z-axis bracket; A Z-axis slide is installed on the Z-axis bracket, and the Z-axis slide has a slide rail arranged in the Z-axis direction; A slide adapter plate, arranged on the Z-axis slide and movably connected to the slide rail; An actuator is arranged and mounted on the slide adapter plate; A motor, connected to the actuator, for driving the telescopic actuator to move along the slide rail; A sampling needle base is arranged and installed on the actuator; A sampling needle is arranged and installed on the sampling needle base; the sampling needle is arranged above the groove of the circular turntable; A dilution gas source, used to provide dilution gas to the gasification component; Wherein, the chemical agent standard substance is gasified in the gasification component to form a chemical agent standard sample of a set concentration with the dilution gas; An industrial toxic gas generating unit is used to generate an industrial toxic gas standard sample of a set concentration; the industrial toxic gas generating unit comprises: Standard gas source, used to store and provide industrial toxic gas standard gas; A dilution gas source, used for storing and providing dilution gas; A gas mixing component, arranged to be in communication with the standard gas source and the dilution gas source; Wherein, the industrial toxic gas standard gas and the dilution gas are arranged to be mixed in the gas mixing component to obtain an industrial toxic gas standard sample; A filtering unit, arranged to be in communication with the chemical agent generating unit and the industrial poison gas generating unit, and used for treating the generated tail gas; The control unit is configured to control the chemical agent generating unit to generate a chemical agent standard sample with a set concentration, and the industrial poison gas generating unit to generate an industrial poison gas standard sample with a set concentration.

2. The sample calibration device for a chemical alarm according to claim 1, characterized in that: The gas mixing component is a gas pipe with a set length.

3. The sample calibration device for a chemical alarm according to claim 1, characterized in that: The standard substance storage unit is arranged and installed on the inner side of the side wall of the sample calibration device, and the standard substance storage unit comprises: A test tube rack including a plurality of open chambers for setting standard substance reagent bottles; A test tube rack upper cover, arranged at the top of the test tube rack, for pressing down the standard substance reagent bottle placed in the open chamber; A connecting piece, used for detachably connecting the upper cover of the test tube rack to the test tube rack; Wherein, a transparent window is provided on the side wall of the standard substance storage unit.

4. The sample calibration device for a chemical alarm according to claim 1, characterized in that: The filtering unit comprises: The filter housing has a cavity inside and an exhaust gas input port and an exhaust gas output port at the upper and lower ends; A composite decontamination agent is arranged and filled in the cavity in the filter housing, and is used to decontaminate chemical agents or industrial toxic gases in the exhaust gas; The adsorbent is arranged and filled in the cavity in the filter housing and is used for adsorbing chemical poisons or industrial poisonous gases in the tail gas.

5. The sample calibration device for a chemical alarm according to claim 1, characterized in that: The control unit comprises: The automatic injection control module is used to control the automatic injection component to achieve automatic injection of chemical agents.

6. The sample calibration device for a chemical alarm according to claim 1, characterized in that: Also included is an airflow stability sensor for detecting whether the generated chemical agent standard sample or industrial toxic gas standard sample meets the set standard.

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