Calibrating device of gas alarm

Abstract

The utility model provides a calibrating device for a gas alarm, which belongs to the technical field of calibrating devices, and is characterized in that the calibrating device comprises a storage tank, the circumferential surface of the storage tank is provided with a first limiting groove, and the first limiting groove is movably clamped with an arc-shaped sealing cover; an air outlet and an air inlet are fixedly connected to the circumferential surface of the storage tank, a circulating fan is fixedly connected to the inner wall of the bottom of the storage tank, a concentration sensor is fixedly connected to the circumferential inner wall of the storage tank, a storage module, a microprocessor and a communication module are arranged in the concentration sensor, and an intelligent display screen is fixedly connected to the circumferential surface of the storage tank; when a low-concentration combustible gas environment is simulated, the concentration error can be controlled within an extremely small range, so that the accurate gas concentration environment is simulated, the accuracy of a verification result is improved, the performance evaluation of the gas alarm is more reliable, and the safety of the gas alarm in actual use is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of testing device, specifically relates to a kind of gas alarm's testing device. BACKGROUND

[0002] Combustible gas refers to the substance that can be ignited and is in gaseous state at normal temperature and pressure, for example hydrogen, acetylene, ethylene, ammonia, hydrogen sulfide, etc., combustible gas has the general characteristics of gas, and a component of combustible gas is called single gas;The mixture of two or more combustible gases is called mixed combustible gas, combustible gas in the corresponding combustion medium, according to a certain proportion, can cause combustion or explosion under the action of ignition source, combustible gas alarm mainly has catalytic combustion type, thermal conductivity type, infrared absorption type and semiconductor type etc.

[0003] The authorized publication number "CN216772585U" records a kind of gas alarm's testing device, including box body, the box body bottom is throughly provided with gas pipe and air pipe, the box body one side middle position is equipped with through slot, the box body outside is fixedly installed with the opening box that is communicated with the through slot, the opening box other side is fixedly installed with fixed link, the fixed link other end is fixedly provided with servo motor.The utility model since movable block is driven to move down by the weight of alarm itself, so that push rod pushes sealing ball to move down, so that T type gas guide groove is communicated with the communication of recess, gas enters the recess inside and is completed by the detection of alarm detection port after passing through through hole, so that multiple alarms can be detected simultaneously, so as to improve work efficiency, sealing ball is inserted into arc slot by reset spring when extruded by sealing external force, and T type gas guide groove is blocked, so as to avoid gas leakage and cause resource waste.

[0004] The above patent since movable block is driven to move down by the weight of alarm itself, so that push rod pushes sealing ball to move down, so that T type gas guide groove is communicated with the communication of recess, gas enters the recess inside and is completed by the detection of alarm detection port after passing through through hole, so that multiple alarms can be detected simultaneously, so as to improve work efficiency, sealing ball is inserted into arc slot by reset spring when extruded by sealing external force, and T type gas guide groove is blocked, so as to avoid gas leakage and cause resource waste, but the above patent has certain deficiency when in use, wherein, part of testing device has the problem of inaccurate gas concentration control, so that it is difficult to simulate the required gas concentration environment accurately, which will undoubtedly have adverse effects on the accuracy of test results, in addition, the versatility of part of testing device is poor, and different models and types of gas alarms cannot be compatible, which makes enterprises have to purchase multiple equipment, thereby increasing equipment procurement cost and subsequent maintenance cost, reduce economic benefit and work efficiency. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of verification devices of gas alarm, to solve the problem that part of verification device in prior art exists gas concentration control less accurate, cause it to be difficult to simulate the required gas concentration environment accurately, This will undoubtedly have adverse effects on the accuracy of verification result, In addition, the versatility of part of verification device is not good, different models and types of gas alarm cannot be compatible, which makes enterprises have to purchase multiple equipment, and then increase equipment procurement cost and subsequent maintenance cost, reduce economic benefit and work efficiency problem.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of verification device of gas alarm, it is characterized by comprising:

[0008] Storage tank, the circumferential surface of storage tank is equipped with first limit slot, first limit slot movably clamps arc-shaped closure cover, the circumferential surface of storage tank is fixedly connected with gas outlet and gas inlet, the bottom inner wall of storage tank is fixedly connected with circulating fan, the circumferential inner wall of storage tank is fixedly connected with concentration sensor, concentration sensor is equipped with storage module, microprocessor and communication module in, the circumferential surface of storage tank is fixedly connected with intelligent display screen;

[0009] Mixing sleeve, mixing sleeve is fixedly connected on the circumferential surface of gas inlet, the circumferential surface of mixing sleeve is fixedly connected with connecting pipe, the circumferential surface of connecting pipe is fixedly connected with flow sensor, connecting pipe, mixing sleeve, gas inlet and storage tank are communicated with each other;

[0010] Limit mechanism, limit mechanism is located at the front side of arc-shaped closure cover, and limit mechanism is used for limiting and fixing gas alarm.

[0011] As a preferred scheme of the utility model, limit mechanism comprises:

[0012] Second limit slot, second limit slot is equipped on one side end of arc-shaped closure cover;

[0013] Limiting hole, four limiting holes are arranged, and the two side inner walls of second limit slot are respectively provided with four limiting holes;

[0014] Spring, four springs are arranged, and the two side inner walls of two springs are respectively fixedly connected with the two side inner walls of two springs;

[0015] Clamp plate, two clamp plates are arranged, and the two side inner walls of two clamp plates are respectively fixedly connected with the two side inner walls of two clamp plates;

[0016] Plastic pad, two plastic pads are arranged, and the two side inner walls of two clamp plates are respectively fixedly connected with the two side inner walls of two clamp plates;

[0017] The limiting rods are four, and the four limiting rods are respectively slidably connected in the four limiting holes and are respectively fixedly connected to the distal ends of the two clamping plates.

[0018] The pulling plates are two, and the two pulling plates are respectively fixedly connected to the distal ends of the four limiting rods.

[0019] As a preferred scheme of the utility model, the upper and lower inner walls of the mixing sleeve are rotationally connected with an impeller, the circumferential inner wall of the mixing sleeve is fixedly connected with a plurality of spoiler baffles, and the top end of the mixing sleeve is fixedly connected with a motor, and the output end of the motor is fixedly connected to the top end of the impeller.

[0020] As a preferred scheme of the utility model, the bottom end of the storage tank is provided with a supporting seat, and the circumferential surface of the supporting seat is fixedly connected with a plastic ring.

[0021] As a preferred scheme of the utility model, the circumferential surface of the gas inlet is fixedly connected with an electric control valve, and the valve plate of the electric control valve is rotationally connected to the circumferential inner wall of the gas inlet.

[0022] As a preferred scheme of the utility model, the circumferential surface of the storage tank is fixedly connected with a gas circulation pipe.

[0023] As a preferred scheme of the utility model, the circumferential surface of the connecting pipe is provided with a threaded groove.

[0024] Compared with the prior art, the utility model has the beneficial effects that:

[0025] 1、In the scheme, the concentration sensor in the gas storage tank monitors the gas concentration in real time, and transmits the signal to the microprocessor, the microprocessor analyzes and processes the data according to the preset concentration value, adjusts the gas flow entering the storage tank by controlling the opening degree of the electric control valve on the circumferential surface of the gas inlet, so as to realize accurate adjustment of the gas concentration, for example, when simulating a low-concentration combustible gas environment, the concentration error can be controlled in a very small range, ensuring that the accurate gas concentration environment is simulated, improving the accuracy of the test results, making the performance evaluation of the gas alarm more reliable, and ensuring the safety in actual use.

[0026] 2、In the scheme, the limiting mechanism on the front side of the arc-shaped sealing cover can adapt to different models and types of gas alarms, and through the synergistic effect of the spring, clamping plate and plastic pad and other components, the clamping force can be automatically adjusted according to the size of the alarm, and different sizes of alarms can be fixed firmly, whether it is a small household alarm or a large industrial alarm, it can be stably placed in the device for testing, without the need for enterprises to purchase multiple special testing equipment, reducing the equipment procurement cost and subsequent maintenance cost, improving the economic benefit and work efficiency of the enterprise, and also facilitating the unified management and testing operation of multiple gas alarms by the enterprise. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0028] Figure 1 It is a perspective view of the present application;

[0029] Figure 2 It is a partial enlarged view of the limiting mechanism in the present application;

[0030] Figure 3 It is a first perspective view of the present application;

[0031] Figure 4 It is a first perspective view of the present application;

[0032] Figure 5 It is a second perspective view of the present application.

[0033] In the drawings: 1, storage tank; 101, first limiting groove; 2, concentration sensor; 3, circulating fan; 4, limiting mechanism; 401, arc-shaped closure cover; 402, pull plate; 403, limiting rod; 404, spring; 405, clamping plate; 406, plastic pad; 407, second limiting groove; 5, gas outlet; 6, mixing sleeve; 7, connecting pipe; 8, flow sensor; 9, threaded groove; 10, support seat; 11, plastic ring; 12, gas circulating pipe; 13, electric control valve; 14, motor; 15, air inlet; 16, impeller; 17, spoiler baffle. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Embodiment 1

[0036] Please refer to Figures 1-5 The present application provides the following technical solutions:

[0037] A calibrating device for a gas alarm, comprising:

[0038] The storage tank 1 is provided with a first limiting groove 101 on the circumferential surface, the first limiting groove 101 movably clamps an arc-shaped closing cover 401, the storage tank 1 is fixedly connected with a gas outlet 5 and a gas inlet 15, the bottom inner wall of the storage tank 1 is fixedly connected with a circulating fan 3, the circumferential inner wall of the storage tank 1 is fixedly connected with a concentration sensor 2, the concentration sensor 2 is internally provided with a storage module, a microprocessor and a communication module, and the circumferential surface of the storage tank 1 is fixedly connected with an intelligent display screen;

[0039] The mixing sleeve 6 is fixedly connected to the circumferential surface of the gas inlet 15, the circumferential surface of the mixing sleeve 6 is fixedly connected with a connecting pipe 7, the circumferential surface of the connecting pipe 7 is fixedly connected with a flow sensor 8, and the connecting pipe 7, the mixing sleeve 6, the gas inlet 15 and the storage tank 1 are in communication with each other.

[0040] The limiting mechanism 4 is arranged on the front side of the arc-shaped closing cover 401 and is used for limiting and fixing the gas alarm.

[0041] In the embodiments of the utility model, the first limiting groove 101 and the arc-shaped closing cover 401: the first limiting groove 101 provides the arc-shaped closing cover 401 with accurate installation position and clamping structure. The arc-shaped closing cover 401 can be conveniently opened and closed by the movable clamping with the first limiting groove 101, which can guarantee the sealing property and facilitate the maintenance, maintenance and gas replacement operation in the tank. This design not only ensures the sealing property of the storage tank 1 during normal operation and prevents gas leakage, but also makes the operation more convenient and efficient.

[0042] The gas outlet 5 and the gas inlet 15: the gas outlet 5 is a channel for outputting the mixed test gas in the storage tank 1, which can transport the gas with accurate concentration to the subsequent calibration link, such as the calibration cabin, to provide the gas environment required for testing the gas alarm. The gas inlet 15 is used for introducing different kinds of gas to mix and adjust in the storage tank 1, so as to simulate various gas environments with different components and concentrations, and meet the calibration requirements of different types of gas alarms.

[0043] The circulating fan 3: the circulating fan 3 is installed on the bottom inner wall of the storage tank 1, and its main function is to promote the mixing and circulation of the gas in the tank. After introducing different gases from the gas inlet 15, the rotation of the circulating fan 3 can form a stable gas flow in the storage tank 1, ensure the uniform mixing of various gases, avoid the local concentration unevenness, and improve the accuracy and stability of the gas concentration, so as to provide reliable gas conditions for the subsequent calibration work.

[0044] Concentration sensor 2: The microprocessor and communication module integrated in the concentration sensor 2 play a key role. The concentration sensor 2 monitors the gas concentration in the storage tank 1 in real time and transmits the detected concentration signal to the microprocessor. The microprocessor analyzes and processes these data, on the one hand, can accurately control the gas flow and mixing ratio of the gas inlet 15 according to the preset gas concentration value, realize the accurate adjustment of the gas concentration, at the same time, store in the storage module, thus complete the calibration work of the gas alarm, the microprocessor will compare and analyze the detection results of the gas alarm with the actual gas concentration monitored by the concentration sensor 2, accurately judge the accuracy and sensitivity of the gas alarm, and clearly display the calibration results through the display screen, the concentration sensor 2 and the intelligent display screen are electrically connected;

[0045] The mixing sleeve 6 is an important part of the preliminary mixing of the gas. The connecting pipe 7 is used to introduce different gas sources, and the gas begins the preliminary mixing process in the mixing sleeve 6. The flow sensor 8 monitors the gas flow entering the mixing sleeve 6 through the connecting pipe 7 in real time;

[0046] The limiting mechanism 4 is located on the front side of the arc-shaped closure cover 401, and its main function is to limit and fix the gas alarm placed in the calibration area in the storage tank 1. It needs to be pointed out that: the specific model of the concentration sensor 2, the circulating fan 3, the intelligent display screen, the flow sensor 8, the electric control valve 13 and the motor 14 used are all prior art, and this scheme will not be described in detail by the person skilled in the art. The related technical personnel selects by themselves, and the above concentration sensor 2, circulating fan 3, intelligent display screen, flow sensor 8, electric control valve 13 and motor 14 all belong to the prior art, and this scheme will not be described in detail.

[0047] For details, please refer to Figures 1-5 , the limiting mechanism 4 comprises:

[0048] The second limiting groove 407 is opened on one side end of the arc-shaped closure cover 401;

[0049] The limiting hole is provided with four limiting holes, and the four limiting holes are respectively opened on the inner walls of the two sides of the second limiting groove 407;

[0050] The spring 404 is provided with four springs 404, and the far ends of the four springs 404 are respectively fixedly connected to the inner walls of the two sides of the plastic pad 406;

[0051] The clamping plate 405 is provided with two clamping plates 405, and the two clamping plates 405 are respectively fixedly connected to the close ends of the two springs 404;

[0052] The plastic pad 406 is provided with two plastic pads 406, and the two plastic pads 406 are respectively fixedly connected to the close ends of the two clamping plates 405;

[0053] Limiting rods 403 are provided with four, four limiting rods 403 are respectively slidingly connected in four limiting holes, four limiting rods 403 are respectively fixedly connected to the opposite ends of the two clamping plates 405;

[0054] Pulling plates 402 are provided with two, two pulling plates 402 are respectively fixedly connected to the opposite ends of the four limiting rods 403.

[0055] In the embodiment: The second limiting groove 407 is opened at one side end of the arc-shaped closure cover 401, when the gas alarm needs to be calibrated, the operator can put the gas alarm along the direction of the second limiting groove 407, so that a part of the gas alarm is located in the second limiting groove 407, thereby ensuring that the position of the gas alarm in the horizontal direction is relatively fixed, preventing it from moving laterally during the calibration process, and providing a basic positioning for the subsequent clamping and fixing operation;

[0056] The two clamping plates 405 directly contact the gas alarm and apply clamping force under the action of the spring 404. The area and shape of the clamping plate 405 are designed to enable it to fully contact the side surface of the gas alarm, increase the friction force, and prevent the gas alarm from moving in the direction perpendicular to the plane of the clamping plate 405. The clamping plate 405 evenly distributes the elastic force of the spring 404 on the surface of the gas alarm, ensuring that the gas alarm maintains a stable position during the calibration process, whether in a slight vibration environment caused by gas flow or in other external interference conditions that the device may be subjected to, so as to ensure that the gas alarm does not move, thereby ensuring the smooth progress of the calibration work and the accuracy of the calibration results;

[0057] The four limiting rods 403 are respectively fixed on the outer sides of the two clamping plates 405 and are slidingly connected in the limiting holes. The limiting rod 403 plays a role in connecting the clamping plate 405 and the pulling plate 402, and is also a guide component for the movement of the clamping plate 405. When the pulling plate 402 is operated, the limiting rod 403 moves along the direction of the limiting hole, driving the clamping plate 405 to move closer to or away from the gas alarm, thereby achieving the clamping and loosening operation of the gas alarm.

[0058] The two pulling plates 402 are respectively fixed on the outer sides of the four limiting rods 403 and are directly operated by the operator. When the gas alarm needs to be fixed, the operator holds the pulling plate 402 and pulls it away from the gas alarm, driving the clamping plate 405 to move outward through the limiting rod 403, at which time the spring 404 is stretched; then the gas alarm is placed in the second limiting groove 407, and the pulling plate 402 is loosened, the spring 404 is contracted, and the clamping plate 405 is driven by the spring 404 and the limiting rod 403 to move closer to the gas alarm and clamp it.

[0059] For details, please refer to Figures 1-3The upper and lower inner walls of the mixing sleeve 6 are rotationally connected with the impeller 16, the circumferential inner wall of the mixing sleeve 6 is fixedly connected with a plurality of turbulence baffles 17, the top end of the mixing sleeve 6 is fixedly connected with the motor 14, and the output end of the motor 14 is fixedly connected to the top end of the impeller 16.

[0060] In this embodiment, the impeller 16 rotates in the mixing sleeve 6 and can produce strong stirring action on the gas entering from the gas inlet 15. When different gases enter the mixing sleeve 6 through the gas inlet 15, the blades of the impeller 16 rapidly rotate, causing the gas molecules to move at high speed along the movement trajectory of the blades, and the different gas molecules collide and penetrate each other, thereby greatly improving the mixing effect of the gas. For example, when mixing oxygen and nitrogen, the rotation of the impeller 16 can rapidly and uniformly disperse oxygen molecules and nitrogen molecules in the entire mixing sleeve 6, thereby improving the uniformity and speed of mixing and laying a foundation for obtaining mixed gas with accurate concentration in the subsequent process;

[0061] The plurality of turbulence baffles 17 are fixed on the circumferential inner wall of the mixing sleeve 6, and the main function is to disrupt the flow direction of the gas. When the impeller 16 pushes the gas to flow, the gas changes direction after encountering the turbulence baffles 17, and complex turbulent flow phenomena are generated;

[0062] The motor 14 serves as a power source and provides stable and reliable power for the rotation of the impeller 16. It can accurately control the rotation speed and direction of the impeller 16 and adjust the working state of the impeller 16 as needed.

[0063] For details, please refer to Figure 2 The bottom end of the storage tank 1 is provided with a support seat 10, and the circumferential surface of the support seat 10 is fixedly connected with a plastic ring 11.

[0064] In this embodiment, the support seat 10 provides a stable support structure for the storage tank 1, so that it can maintain a fixed position and posture in the working environment. It bears the weight of the storage tank 1 and the gas inside it, prevents it from tipping over or shifting due to unstable placement, and ensures the safety and stability of the entire calibration device.

[0065] The plastic ring 11 is installed on the circumferential surface of the support seat 10 and has multiple functions. First, it can act as a buffer to reduce the impact force between the storage tank 1 and the support surface when it is placed or subjected to slight vibration, protecting the bottom of the storage tank 1 from wear and damage.

[0066] For details, please refer to Figures 1-5 The circumferential surface of the gas inlet 15 is fixedly connected with an electric control valve 13, and the valve plate of the electric control valve 13 is rotationally connected to the circumferential inner wall of the gas inlet 15.

[0067] In this embodiment, the electrically controlled valve 13 can accurately control the gas flow of the gas inlet 15. Through the control of the electric signal, the operator can adjust the opening of the valve according to the needs, so as to realize the accurate control of the amount of gas entering the storage tank 1. When mixing gas, the proportion of different gases needs to be accurately adjusted.

[0068] For details, please refer to Figures 1-3 The circumferential surface of the storage tank 1 is fixedly connected with the gas circulating pipe 12.

[0069] In this embodiment, the main function of the gas circulating pipe 12 is to promote the circulation of gas in the storage tank 1, and further improve the uniformity and stability of gas mixing. When the gas enters the storage tank 1 from the gas inlet 15, under the action of the circulating fan 3, the gas begins to circulate in the storage tank 1. The gas circulating pipe 12 provides an additional circulation path for the gas, so that the gas can flow and mix more fully in the storage tank 1.

[0070] For details, please refer to Figures 1-5 The circumferential surface of the connecting pipe 7 is provided with a threaded groove 9.

[0071] In this embodiment, the threaded groove 9 is provided on the circumferential surface of the connecting pipe 7, which is used to connect the external gas conveying pipeline or gas source device. The threaded connection has good sealing and reliability, which can prevent gas leakage at the connection part.

[0072] The working principle and use process of the utility model: according to the demand of verification, through connecting pipe 7, different kinds of gas source are introduced into mixed sleeve 6. At this time, flow sensor 8 monitors the flow of each gas in real time, and rapidly transmits data to microprocessor in concentration sensor 2. Then start motor 14, and motor 14 drives impeller 16 to rotate at high speed in mixed sleeve 6, and the entering gas is strongly stirred, so that the gas molecules follow the movement track of impeller 16 blade and move at high speed, and the different gas molecules collide and penetrate each other, so that the preliminary mixing of gas is realized. At the same time, the multiple turbulence baffles 17 fixedly connected on the circumferential inner wall of mixed sleeve 6 can disturb the flow direction of gas, so that the gas produces complex turbulent flow phenomenon, and further promotes the uniform mixing of gas in mixed sleeve 6. The gas after preliminary mixing enters storage tank 1 through air inlet 15. The electric control valve 13 on the circumferential surface of air inlet 15 controls the gas flow accurately according to the instruction of microprocessor, so as to accurately adjust the mixing ratio of gas. The circulating fan 3 fixedly connected on the inner wall of the bottom of storage tank 1 is started, so as to form stable air flow in the tank and drive the circulating flow of gas. The gas circulation pipe 12 provides additional circulation path for gas, so that the gas can flow and mix more fully in the storage tank 1, and the situation of local concentration unevenness is effectively avoided. Concentration sensor 2 monitors the gas concentration in storage tank 1 in real time, and transmits the signal to microprocessor. The microprocessor analyzes and processes the data according to the preset gas concentration value, and if the monitored gas concentration deviates from the preset value, the opening of electric control valve 13 will be adjusted immediately, and the gas flow of air inlet 15 will be adjusted, so as to realize the accurate adjustment of gas concentration, and ensure that the accurate gas concentration environment is simulated.

[0073] Next is the gas alarm verification stage. The operator holds the two pull plates 402 of the limiting mechanism 4, pulls them away from the storage tank 1, and the pull plates 402 drive the limiting rods 403 to stably slide in the limiting holes, so that the clamping plates 405 move outward, and the springs 404 are stretched at this time. Then, the gas alarm to be verified is carefully placed in the second limiting groove 407 opened on one side end of the arc-shaped closure cover 401, so that the gas alarm is accurately positioned in the second limiting groove 407, ensuring that its position in the horizontal direction is relatively fixed. Then, the pull plates 402 are loosened, the springs 404 contract, and the clamping plates 405 rapidly approach the gas alarm under the cooperation of the springs 404 and the limiting rods 403, tightly contact the gas alarm through the plastic pads 406 and apply sufficient clamping force, so that the gas alarm is firmly fixed in the storage tank 1, ensuring that it remains stable during the verification process and is not affected by any vibration and external interference. The mixed test gas with accurate concentration is stably delivered to the gas alarm through the gas outlet 5 of the storage tank 1, the gas alarm detects the gas and transmits the detection signal to the microprocessor, which can be wired or wireless communication. The microprocessor compares and analyzes the detection result of the gas alarm with the actual gas concentration monitored by the concentration sensor 2, accurately judges the accuracy and sensitivity of the gas alarm, and clearly displays the verification result on the display screen and stores it in the storage module. Thus, the verification of the gas alarm is completed.

[0074] Finally, the completion of verification and subsequent processing stage is entered. The operator pulls the pull plates 402 of the limiting mechanism 4 again to loosen the clamping of the gas alarm, and carefully takes out the verified gas alarm from the storage tank 1. Then, the power of each device is turned off, and the gas supply is stopped. The inside of the storage tank 1, the mixing sleeve 6 and other components are carefully checked for any residual gas or impurities, and cleaned in a timely manner if necessary. Regularly maintain the equipment, such as checking the wear and tear of each component, the sealing performance, etc., to ensure that the equipment can operate normally and stably the next time it is used, effectively ensuring the accuracy and reliability of the verification result.

[0075] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gas alarm calibrating device, characterized in that, include: Storage tank (1), the circumferential surface of the storage tank (1) is provided with a first limiting groove (101), the first limiting groove (101) is movably engaged with an arc-shaped sealing cover (401), the circumferential surface of the storage tank (1) is fixedly connected with an air outlet (5) and an air inlet (15), the bottom inner wall of the storage tank (1) is fixedly connected with a circulating fan (3), the circumferential inner wall of the storage tank (1) is fixedly connected with a concentration sensor (2), the concentration sensor (2) is provided with a storage module, a microprocessor and a communication module, and the circumferential surface of the storage tank (1) is fixedly connected with a smart display screen; A mixing sleeve (6) is fixedly connected to the circumferential surface of the air inlet (15). A connecting pipe (7) is fixedly connected to the circumferential surface of the mixing sleeve (6). A flow sensor (8) is fixedly connected to the circumferential surface of the connecting pipe (7). The connecting pipe (7), the mixing sleeve (6), the air inlet (15), and the storage tank (1) are interconnected. Limiting mechanism (4) is located on the front side of the arc-shaped closed cover (401) and is used to limit and fix the gas alarm.

2. A gas alarm calibrating device according to claim 1, characterized in that: The limiting mechanism (4) includes: The second limiting groove (407) is opened on one side of the arc-shaped closed cover (401); The limiting holes are provided in four places, and the four limiting holes are respectively opened on the inner walls of both sides of the second limiting groove (407); Spring (404), four springs (404) are provided, and the far ends of the four springs (404) are respectively fixedly connected to the inner walls of the two sides of the plastic pad (406); Two clamping plates (405) are provided, and the two clamping plates (405) are respectively fixedly connected to the close ends of the two springs (404); Plastic pad (406), two clamping plates (405) are provided, and the two plastic pads (406) are respectively fixedly connected to the close ends of the two clamping plates (405); The limiting rod (403) is provided in four parts. The four limiting rods (403) are slidably connected in four limiting holes respectively, and the four limiting rods (403) are fixedly connected to the far ends of two clamping plates (405). Pull plate (402), two pull plates (402) are provided, and the two pull plates (402) are respectively fixedly connected to the far ends of the four limiting rods (403).

3. A gas alarm testing apparatus according to claim 2, wherein: The upper and lower inner walls of the mixing sleeve (6) are rotatably connected to an impeller (16), and the inner circumferential wall of the mixing sleeve (6) is fixedly connected to a plurality of turbulence baffles (17). The top end of the mixing sleeve (6) is fixedly connected to a motor (14), and the output end of the motor (14) is fixedly connected to the top end of the impeller (16).

4. A gas alarm testing apparatus according to claim 3, wherein: The storage tank (1) is equipped with a support base (10) at its bottom end, and a plastic ring (11) is fixedly connected to the circumferential surface of the support base (10).

5. A gas alarm testing apparatus according to claim 4, wherein: The circumferential surface of the air inlet (15) is fixedly connected with an electric control valve (13), and the valve piece of the electric control valve (13) is rotationally connected to the circumferential inner wall of the air inlet (15).

6. A gas alarm testing apparatus according to claim 5, wherein: The circumferential surface of the storage tank (1) is fixedly connected with a gas circulation pipe (12).

7. A gas alarm testing apparatus according to claim 6, wherein: The circumferential surface of the connecting pipe (7) is provided with a threaded groove (9).

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