Field calibration device for FGS gas sensor detection

Abstract

The invention provides a field calibration device for FGS gas sensor detection, and relates to the technical field of FGS gas sensor detection and calibration. The gas alarm probe rod comprises a telescopic outer rod, a plurality of telescopic inner rods, a gas hood and a ventilation pipeline, the telescopic inner rods are sleeved with the telescopic outer rod, and the ventilation pipeline penetrates through the telescopic inner rods and extends to the outer side of the telescopic outer rod; the gas hood communicates with the ventilation pipeline and is arranged at one end of the telescopic inner rod; the mixed gas control device comprises a standard gas cylinder and a portable dynamic dilution instrument, the output end of the standard gas cylinder is communicated with a split charging gas cylinder, a flow meter, a plurality of pressure gauges and a plurality of valve bodies are arranged between the standard gas cylinder and the split charging gas cylinder, the flow meter is located at a standard gas outlet, and the standard gas outlet is used for being connected with a ventilation pipeline; and the flowmeter, the plurality of pressure gauges and the plurality of valve bodies are electrically connected with the portable dynamic dilution instrument. The device is convenient to move, high in flexibility, suitable for multiple scenes, small in size and convenient to carry.

Description

Technical Field

[0001] This invention relates to the field of FGS gas sensor testing and calibration technology, and in particular to a field calibration device for FGS gas sensor testing. Background Technology

[0002] A Fire and Gas System (FGS) is a safety management system for detecting fires and gases. It collects detection signals from fire buttons, smoke, fire, combustible gases, and toxic gases on-site, and outputs them through software logic to automate the recording, control, and warning of alarm lights, alarm bells, deluge valves, foam valves, and fresh air inlet valves of air conditioning systems. To ensure the normal operation of the system, the accuracy and reliability of downstream hardware systems (various FGS sensors and controllers) must be ensured. Therefore, it is necessary to regularly test and calibrate the downstream hardware systems.

[0003] On-site calibration of gas alarms mainly targets the calibration of indication error, repeatability, and alarm function. On-site calibration is mainly performed by introducing gas standard substances of different concentrations into the gas alarm. However, traditional calibration methods lack miniaturization, portability, and adaptability to multiple scenarios, thus failing to adapt to various scenarios and reduce the types and quantities of standard gases used for calibration, thus failing to meet the requirements of miniaturization and portability for on-site calibration.

[0004] Therefore, there is an urgent need for an on-site calibration device for FGS gas sensor detection to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an on-site calibration device for FGS gas sensor detection, which is characterized by its portability, high flexibility, adaptability to various scenarios, small size, and easy portability. The numerous technical effects of the preferred technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an on-site calibration device for FGS gas sensor detection, comprising: Turnover cart; A gas alarm probe includes a telescopic outer rod, several telescopic inner rods, a gas cover, and a ventilation pipe. The telescopic inner rods are sleeved inside the telescopic outer rod, and the ventilation pipe passes through the telescopic inner rods and extends to the outside of the telescopic outer rod. The gas cover is connected to the ventilation pipe and is located at one end of the telescopic inner rod. A gas mixing control device includes a standard gas cylinder and a portable dynamic dilution device. The output end of the standard gas cylinder is connected to a dispensing gas cylinder. A flow meter, multiple pressure gauges, and multiple valves are installed between the standard gas cylinder and the dispensing gas cylinder. The flow meter is located at the standard gas outlet, which is used for connecting the gas supply pipeline. The flow meter, multiple pressure gauges, and multiple valves are all electrically connected to the portable dynamic dilution device.

[0007] Preferably, the standard gas cylinder includes a carbon fiber cylinder and / or an aluminum alloy cylinder, and both the carbon fiber cylinder and the aluminum alloy cylinder are equipped with a customized connector on the top, wherein: The custom connector includes an installation head that can be connected to the neck of the carbon fiber gas cylinder or aluminum alloy gas cylinder. An adjustable valve is movably installed inside the top of the installation head. A male connector is connected to one side of the top of the installation head, and a built-in filter screen is installed inside the male connector. A pressure gauge is connected to the other side of the top of the installation head.

[0008] Preferably, the turnover trolley is provided with multiple receiving parts for accommodating the standard gas cylinders, and each receiving part is provided with a gas cylinder back frame, which is fixedly installed on the bearing surface of the turnover trolley by a fixing strap.

[0009] Preferably, the gas cylinder back frame includes a back plate, a gas cylinder fixing rope is fixedly installed on the top of the back of the back plate, a gas cylinder fixing bracket is fixedly installed on the bottom of the back of the back plate, and support connecting straps are fixedly installed on both sides of the front of the back plate, with the bottom of the support connecting straps fixed to the fixing straps; the carbon fiber gas cylinder or the aluminum alloy gas cylinder can be sleeved inside the gas cylinder fixing rope and the gas cylinder fixing bracket.

[0010] Preferably, the customized connector is connected to the pipeline via a quick-connect structure, the quick-connect structure comprising a first pipe body and a second pipe body, wherein the first pipe body is used to connect the customized connector or pipeline, and the second pipe body is used to connect the pipeline or customized connector, wherein: A sleeve of the same diameter is fitted onto the outer side of the first tube body; The outer side of the second tube is fitted with a shell, and the outer side of the shell is fitted with a tube sleeve. The inner side of the tube sleeve is provided with a locking device for engaging with the end of the first tube.

[0011] Preferably, the valve body includes a pressure regulating valve, a three-way switching valve, a solenoid valve, a pressure relief valve, a gas cylinder valve, and an emptying valve, and the pressure gauge includes a first pressure gauge and a second pressure gauge, wherein: The output end of the standard gas cylinder is connected to the first pressure gauge, the output end of the first pressure gauge is connected to the pressure regulating valve, the other end of the pressure regulating valve is connected to the three-way switching valve, the second passage of the three-way switching valve is connected to the solenoid valve, the third passage of the three-way switching valve is connected to the pressure relief valve through a manifold, the output end of the pressure relief valve is connected to the gas cylinder valve, the output end of the gas cylinder valve is connected to the dispensing gas cylinder, the second pressure gauge is installed between the gas cylinder valve and the dispensing gas cylinder, the output end of the dispensing gas cylinder is connected to the venting valve, and the output end of the solenoid valve is connected to the flow meter. The output control terminal of the portable dynamic dilution instrument is connected to the input terminals of the pressure regulating valve, the three-way switching valve, and the solenoid valve via wires. The input terminal of the portable dynamic dilution device is electrically connected to the output terminals of the first pressure gauge and the flow meter via wires.

[0012] Preferably, the standard gas cylinder, the first pressure gauge, the pressure regulating valve, the three-way switching valve, the solenoid valve, the portable dynamic dilution device, the flow meter, the pressure relief valve, the gas cylinder valve, the second pressure gauge, the venting valve, and the dispensing gas cylinder and pipeline are all provided with a double compression fitting sealing structure.

[0013] Preferably, the sealing structure includes a pipe body and a compression fitting body, wherein: The compression fitting body is movably sleeved on the outside of the pipe body. A connecting nut is threaded onto the outside of the compression fitting body. A locking ring is installed on the outside of the pipe body. A compression sealing ring is fixedly sleeved on the inside of the compression fitting body.

[0014] Preferably, the number of the standard gas cylinder, the first pressure gauge, the pressure regulating valve, the three-way switching valve, and the solenoid valve is at least one set.

[0015] Preferably, it further includes a power supply module, wherein: The input terminal of the portable dynamic dilution device is adapted to the output terminal of the power supply module.

[0016] The on-site calibration device for FGS gas sensor detection provided by this invention has the following advantages and positive effects: 1. By setting up a turnover trolley, which can accommodate the gas mixing control device and the gas alarm probe, it features convenient movement, high flexibility, adaptability to multiple scenarios, and small device size.

[0017] 2. The gas mixing control device includes a standard gas cylinder and a portable dynamic dilution device, which can realize automatic gas switching and low-pressure gas filling. The gas mixing part of the gas mixing control device can automatically switch to different concentrations of gas required for calibration as needed. The filling function can be used in locations where the calibration device is inconvenient to reach, by filling the required concentration of standard gas into the dispensing gas cylinder, and calibrating and testing the gas alarm by carrying the small bottle of standard gas.

[0018] 3. To facilitate the on-site handling of carbon fiber and aluminum alloy gas cylinders, custom-made connectors are installed, which enable quick and convenient transfer of the cylinders. Based on the actual on-site conditions, the carbon fiber and aluminum alloy gas cylinders are combined with the transfer trolley for easy handling on the offshore platform.

[0019] 4. The probe of the gas alarm is a hollow carbon fiber tube with an internal gas path, avoiding the problem of external interference during on-site calibration of external pipelines. The standard gas generated by the gas mixing control device is transmitted to the gas hood at the front end through the gas pipeline inside the gas alarm probe. By covering the probe of the gas alarm with the gas hood, standard gases of different concentrations are introduced into the gas alarm in conjunction with the dynamic dilution device, thereby realizing the detection of metrological characteristics such as indication error and alarm action value.

[0020] 5. By customizing lightweight gas cylinders, gas mixing devices, and matching gas cylinder carriers, alarms can be quickly and conveniently calibrated for all terrain conditions. To meet the needs of situations where it is difficult to climb to heights or for gas cylinder carts to reach the site, the gas mixing device can be used to dispense standard gas into smaller and lighter standard gas cylinders. The gas cylinder carrier allows for the back placement of gas cylinders, and the push-button switch on the calibration rod facilitates personnel climbing to inspect the cylinders. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the turnover trolley in the field calibration device for FGS gas sensor detection of the present invention; Figure 2 This is a schematic diagram of the gas alarm probe in the field calibration device for FGS gas sensor detection according to the present invention; Figure 3 This is a schematic diagram of the carbon fiber gas cylinder in the field calibration device for FGS gas sensor detection of the present invention. Figure 4This is a schematic diagram of the aluminum alloy gas cylinder in the field calibration device for FGS gas sensor detection of the present invention; Figure 5 This is a schematic diagram of the internal structure of the customized connector in the field calibration device for FGS gas sensor detection of the present invention; Figure 6 This is a schematic diagram of the gas cylinder back frame in the field calibration device for FGS gas sensor detection of the present invention; Figure 7 This is a schematic diagram of the partial insertion of the sealing structure in the field calibration device for FGS gas sensor detection of the present invention; Figure 8 This is a schematic diagram of the internal connection structure of the quick connector in the field calibration device for FGS gas sensor detection of the present invention; Figure 9 This is a control principle diagram of the gas mixing control device in the field calibration device for FGS gas sensor detection of the present invention; Figure 10 This is a schematic diagram of the lithium battery power supply module in the field calibration device for FGS gas sensor detection of the present invention; Figure 11 This is a block diagram of the human-computer interaction system hierarchy of the portable dynamic dilution instrument in the field calibration device for FGS gas sensor detection of the present invention.

[0023] In the picture: 1. Turnover trolley; 2. Gas alarm probe; 201. Gas cover; 202. Telescopic inner rod; 203. Telescopic outer rod; 204. Ventilation pipe; 3. Carbon fiber gas cylinder; 4. Aluminum alloy gas cylinder; 5. Customized connectors; 501. Adjustable valve; 502. Mounting head; 503. Male connector; 504. Built-in filter; 505. Pressure gauge; 6. Gas cylinder back frame; 601. Back panel; 602. Gas cylinder fixing rope; 603. Gas cylinder fixing support; 604. Fixing strap; 605. Support connecting strap; 7. Sealing structure; 701. Pipe body; 702. Locking ring; 703. Compression sealing ring; 704. Connecting nut; 705. Compression fitting body; 8. Quick connector structure; 801. First tube body; 802. Locking device; 803. First sealing ring; 804. Second sealing ring; 805. Third sealing ring; 806. Second tube body; 807. Outer shell; 808. Tube body sleeve; 809. Tube diameter sleeve; 9. Gas mixing control device; 901. Standard gas cylinder; 902. First pressure gauge; 903. Pressure regulating valve; 904. Three-way switching valve; 905. Solenoid valve; 906. Portable dynamic dilution device; 907. Flow meter; 908. Pressure relief valve; 909. Gas cylinder valve; 910. Second pressure gauge; 911. Dispensing gas cylinder; 912. Vent valve; 10. Power supply module. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] In the description of this invention, it should be understood that the terms "center," "side," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] See Figures 1-11 This embodiment provides an on-site calibration device for FGS gas sensor detection, including a turnover trolley 1, a gas alarm probe 2, and a gas mixing control device 9.

[0028] like Figure 1 As shown, the turnover trolley 1 has a frame structure with casters at the bottom. The turnover trolley 1 is equipped with a gas alarm probe 2 and a gas mixing control device 9.

[0029] like Figure 2As shown, the gas alarm probe 2 includes a telescopic outer rod 203, and several telescopic inner rods 202 are sleeved inside the telescopic outer rod 203. A gas cover 201 is installed at the top of the telescopic inner rod 202, and a ventilation pipe 204 is connected to the bottom of the gas cover 201. The ventilation pipe 204 passes through the telescopic inner rod 202 and extends to the outside of the telescopic outer rod 203 and is connected to the standard gas outlet of the gas mixing control device 9.

[0030] In this embodiment, the main body of the gas alarm probe 2, including the telescopic outer rod 203 and the telescopic inner rod 202, is made of carbon fiber. By designing the probe body to be hollow and the gas path to be built-in, the problem of external pipelines being easily interfered with by external structures during on-site calibration is avoided. The standard gas generated by the gas mixing control device 9 is transmitted to the front gas cover 201 through the gas pipe 204 inside the gas alarm probe 2. The gas cover 201 covers the probe of the gas alarm. In conjunction with the portable dynamic dilution instrument 906 set in the gas mixing control device 9, standard gases of different concentrations are introduced into the gas alarm, thereby realizing the detection of metrological characteristics such as indication error and alarm action value.

[0031] like Figure 9 As shown, the gas mixing control device 9 includes a standard gas cylinder 901 and a portable dynamic diluent 906. In this embodiment, the portable dynamic diluent 906 is a portable dynamic diluent with a human-machine interface (HMI). The output end of the standard gas cylinder 901 is connected to a dispensing gas cylinder 911. A flow meter 907, multiple pressure gauges, and multiple valves are installed between the standard gas cylinder 901 and the dispensing gas cylinder 911. The flow meter 907 is located at the standard gas outlet, which is used to connect to the gas supply line 204. The flow meter 907, multiple pressure gauges, and multiple valves are all electrically connected to the portable dynamic diluent 906.

[0032] Specifically, in this embodiment, the valve body includes a pressure regulating valve 903, a three-way switching valve 904, a solenoid valve 905, a pressure relief valve 908, a gas cylinder valve 909, and an emptying valve 912, and the pressure gauges include a first pressure gauge 902 and a second pressure gauge 910. The standard gas cylinder 901 has a first pressure gauge 902 connected to its output end. The first pressure gauge 902 has a pressure regulating valve 903 connected to its output end. The other end of the pressure regulating valve 903 is connected to a three-way switching valve 904. The second passage of the three-way switching valve 904 is connected to a solenoid valve 905. The third passage of the three-way switching valve 904 is connected to a pressure relief valve 908 via a manifold. The output end of the pressure relief valve 908 is connected to a gas cylinder valve 909. The output end of the gas cylinder valve 909 is connected to a dispensing gas cylinder 911. A second pressure gauge 910 is installed on the pipeline between the gas cylinder valve 909 and the dispensing gas cylinder 911. The output end of the dispensing gas cylinder 911 is connected to a vent valve 912. The output end of the solenoid valve 905 is connected to a flow meter 907, which is located at the standard gas outlet.

[0033] The quantity of the standard gas cylinder 901, first pressure gauge 902, pressure regulating valve 903, three-way switching valve 904, and solenoid valve 905 can be set to at least one group according to actual usage needs. This embodiment uses four groups of standard gas cylinders 901, first pressure gauge 902, pressure regulating valve 903, three-way switching valve 904, and solenoid valve 905 as an example for illustration. Figure 9 As shown, the four sets of standard gas cylinders 901 are connected to the pressure regulating valve 903 through the first pressure gauge 902, and the mixing / canning mode is switched through the three-way switching valve 904.

[0034] The output control terminal of the portable dynamic dilution instrument 906 is connected to the input terminals of the pressure regulating valve 903, the three-way switching valve 904, and the solenoid valve 905 via wires; the input terminal of the portable dynamic dilution instrument 906 is electrically connected to the output terminals of the first pressure gauge 902 and the flow meter 907 via wires.

[0035] like Figure 3 and Figure 4 As shown, the standard gas cylinder 901 includes a carbon fiber cylinder 3 and / or an aluminum alloy cylinder 4. The turnover trolley 1 is equipped with multiple receiving sections for accommodating the standard gas cylinder 901, and the dimensions of the carbon fiber cylinder 3 or aluminum alloy cylinder 4 are adapted to the dimensions of the receiving sections of the turnover trolley 1. Specifically, the turnover trolley 1 is welded from industrial aluminum profiles, and a cylinder back frame 6 is fixedly mounted on the bottom of the front of the turnover trolley 1, i.e., the bearing surface, via a fixing strap 604; the dimensions of the cylinder back frame 6 are adapted to the dimensions of the carbon fiber cylinder 3 and the aluminum alloy cylinder 4. Both the carbon fiber cylinder 3 and the aluminum alloy cylinder 4 have custom-made connectors 5 on their tops.

[0036] like Figure 5As shown, the custom connector 5 includes a mounting head 502, an adjustable valve 501 is movably mounted inside the top of the mounting head 502, an 8mm male connector 503 is connected to one side of the top of the mounting head 502, a built-in filter screen 504 is installed inside the 8mm male connector 503, and a pressure gauge 505 is connected to the other side of the top of the mounting head 502.

[0037] like Figure 6 As shown, the gas cylinder back frame 6 includes a back plate 601. Two gas cylinder fixing ropes 602 are fixedly installed on the top of the back of the back plate 601, and two gas cylinder fixing supports 603 are fixedly installed on the bottom of the back of the back plate 601. Support connecting straps 605 are fixedly installed on both sides of the front of the back plate 601, and the bottom of the support connecting straps 605 is fixed to the fixing straps 604. When the gas cylinder back frame 6 is in use, the carbon fiber gas cylinder 3 is sleeved inside the gas cylinder fixing ropes 602 and the gas cylinder fixing supports 603.

[0038] To address situations where access is difficult due to height or the inaccessibility of the trolley, a gas mixing control device 9 is incorporated to dispense standard gas into smaller, lighter standard gas cylinders. These cylinders are then carried on the back using a cylinder carrier 6. For ease of use, a vent valve is installed inside the gas alarm probe 2 to control the gas flow. A push-button switch for controlling the vent valve is located on the telescopic outer rod 203 of the gas alarm probe 2, facilitating inspection from heights. This device also features low-pressure filling capabilities, allowing standard gas cylinders from the cylinder transport trolley 1 to be transferred into smaller, lighter cylinders. The cylinder carrier 6 and lightweight cylinders enable calibration of alarms in challenging terrain.

[0039] In this embodiment, the standard gas cylinder 901, the first pressure gauge 902, the pressure regulating valve 903, the three-way switching valve 904, the solenoid valve 905, the portable dynamic dilution instrument 906, the flow meter 907, the pressure relief valve 908, the gas cylinder valve 909, the second pressure gauge 910, the vent valve 912, and the dispensing gas cylinder 911 all adopt a double compression fitting sealing structure 7 between themselves and the pipelines. The pipelines between the various components are made of φ6mm polytetrafluoroethylene tubing, which has good anti-adsorption and anti-corrosion properties.

[0040] Specifically, such as Figure 7 As shown, the sealing structure 7 includes a pipe body 701 and a compression fitting body 705. The compression fitting body 705 is movably sleeved on the outside of the pipe body 701. A connecting nut 704 is threaded onto the outside of the compression fitting body 705. A locking ring 702 is fixedly installed on the outside of the pipe body 701, and a compression sealing ring 703 is fixedly sleeved on the inside of the compression fitting body 705. The connecting nut 704 is movably sleeved on the outside of the pipe body 701, the locking ring 702 is movably sleeved on the inside of the compression fitting body 705, and the compression sealing ring 703 is movably sleeved on the outside of the pipe body 701. In this embodiment, the pipe body 701 is made of aluminum-lined plastic pipe.

[0041] In this embodiment, the customized connector 5 is connected to the pipeline via a quick-connect structure 8. For example... Figure 8 As shown, the quick connector structure 8 includes a first tube body 801 and a second tube body 806. The first tube body 801 is used to connect the custom connector 5 or the pipeline, and the second tube body 806 is used to connect the pipeline or the custom connector 5.

[0042] Specifically, a pipe diameter sleeve 809 is fitted onto the outer side of the first pipe body 801; a housing 807 is fitted onto the outer side of the second pipe body 806, and a pipe body sleeve 808 is fitted onto the outer side of the housing 807. A locking device 802 for mating with the end of the first pipe body 801 is provided on the inner side of the pipe body sleeve 808. The quick-connect structure 8 also includes a first sealing ring 803, a second sealing ring 804, and a third sealing ring 805 to seal the structural connection. Optionally, the first sealing ring 803, the second sealing ring 804, and the third sealing ring 805 are respectively located on the mating surfaces of the first pipe body 801 and the second pipe body 802, and on the mating surfaces of the second pipe body 806, the housing 807, and the pipe body sleeve 808, forming a triple seal to further reduce the risk of leakage and meet the sealing requirements of calibration gases.

[0043] Since the disassembly and assembly of existing standard gas cylinders are relatively time-consuming and labor-intensive, the handwheel can be tightened by using the customized connector 5, and the connection between the gas cylinder and the pipeline can also be changed to a quick-connect plug to improve work efficiency.

[0044] like Figure 10 As shown, this embodiment also includes a power supply module 10, which includes a rechargeable lithium battery pack or an AC adapter, with an output voltage of 12-24V. The input terminal of the portable dynamic dilution instrument 906 is adapted to the output terminal of the power supply module 10.

[0045] like Figure 11 As shown, the portable dynamic dilution device 906 includes an HMI (Human-Machine Interface) system. The HMI system uses an industrial configuration panel and controls hardware systems such as gas flow and solenoid valves through the interactive system. The HMI system is a mature existing technology and specifically includes an interface layer, a transmission layer, a data layer, and a storage layer. The interface layer components connect the portable dynamic dilution device 906 and the gas alarm probe 2, displaying charts on the screen. The background management includes a recipe module and a ladder diagram module. The transmission layer components include RS485 and RS232, and the background management uses ODBC. The data layer components include a vertical record query interface and an interactive control data input interface. The background management includes a data storage module and a data retrieval module. The storage layer uses an SQL database. The HMI system also embeds a system management module where user permissions can be set.

[0046] In mixed gas mode, first switch the three-way switching valve 904 to mixed gas mode. Adjust the pressure regulating valve 903 to a suitable pressure. Through the HMI human-machine interface system, control the opening and closing of the solenoid valve 905 to achieve the switching of different gas concentrations, thereby realizing the detection of the gas alarm. In filling mode, first switch the three-way switching valve 904 to filling mode. Adjust the pressure regulating valve 903 to open the gas cylinder valve 909 and the vent valve 912 of the dispensing gas cylinder 911. After the internal gas replacement is completed, close the vent valve 912. When the gauge pressure of the dispensing gas cylinder 911 is consistent with the gauge pressure of the standard gas cylinder, the filling is completed. Close the gas cylinder valve 909 and the pressure regulating valve 903 of the dispensing gas cylinder 911 in sequence, open the vent valve 912 in front of the dispensing gas cylinder 911 to purge the residual gas in the pipeline, and disconnect the connecting pipeline. Through this process, the filling of the dispensing gas cylinder 911 is completed.

[0047] Working Principle: The gas alarm field calibration unit is based on the dynamic dilution method and employs high-precision flow control technology to dynamically prepare standard gases of different concentrations for calibration. This reduces the types and quantities of standard gases used for calibration, achieving miniaturization and portability in field calibration. The gas alarm field calibration device mainly consists of a turnover cart 1, a gas mixing control device 9, and a gas alarm probe 2. Considering the actual field conditions, carbon fiber gas cylinders 3 and aluminum alloy gas cylinders 4 are integrated with the turnover cart 1 for easy transport on offshore platforms. The turnover cart 1 uses industrial aluminum profiles as its frame base, minimizing overall weight while maintaining strength requirements. The gas mixing control device 9 enables automatic gas switching and low-pressure gas filling. The mixing section of the gas mixing control device 9 can automatically switch between different concentrations of gas required for calibration as needed. The filling function allows for the filling of standard gases of the required concentration into dispensing gas cylinders 911 in locations inaccessible to the calibration device, enabling calibration and testing of the gas alarm by carrying these small standard gas cylinders. Considering the product's usage scenario, this solution utilizes mechanical control systems as much as possible while meeting functional requirements.

[0048] To reduce the weight of the device, the 911 gas cylinder also uses carbon fiber cylinder 3 and / or aluminum alloy cylinder 4. The relevant technical parameters of the two types of gas cylinders are compared as follows: As shown in the table above, a 0.8L carbon fiber gas cylinder has a working pressure of 30MPa and a usable gas volume of 240L, while a 1L aluminum alloy gas cylinder has a working pressure of 15MPa and a usable gas volume of 150L. In this embodiment, the dispensing gas cylinder 911 can be either an aluminum alloy gas cylinder 4 or a carbon fiber gas cylinder 3, depending on the actual usage requirements. In some special cases, both aluminum alloy gas cylinder 4 and carbon fiber gas cylinder 3 can be used.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A field calibration device for FGS gas sensor detection, characterized in that, include: Turnover trolley (1); The gas alarm probe (2) includes a telescopic outer rod (202), several telescopic inner rods (203), a gas cover (201), and a ventilation pipe (204). The telescopic inner rods (203) are sleeved inside the telescopic outer rod (202), and the ventilation pipe (204) passes through the telescopic inner rods (203) and extends to the outside of the telescopic outer rod (202). The gas cover (201) is connected to the ventilation pipe (204) and is located at one end of the telescopic inner rods (203). The gas mixing control device (9) includes a standard gas cylinder (901) and a portable dynamic dilution device (906). The output end of the standard gas cylinder (901) is connected to a dispensing gas cylinder (911). A flow meter (907), multiple pressure gauges, and multiple valves are provided between the standard gas cylinder (901) and the dispensing gas cylinder (911). The flow meter (907) is located at the standard gas outlet, which is used for connecting the gas supply line (204). The flow meter (907), multiple pressure gauges, and multiple valves are all electrically connected to the portable dynamic dilution device (906).

2. The field calibration device for FGS gas sensor detection according to claim 1, characterized in that, The standard gas cylinder (901) includes a carbon fiber cylinder (3) and / or an aluminum alloy cylinder (4), both the carbon fiber cylinder (3) and the aluminum alloy cylinder (4) having a custom connector (5) at the top, wherein: The custom connector (5) includes a mounting head (502) that can be connected to the mouth of the carbon fiber gas cylinder (3) or aluminum alloy gas cylinder (4). An adjustable valve (501) is movably installed inside the top of the mounting head (502). A male connector (503) is connected to one side of the top of the mounting head (502). A built-in filter screen (504) is installed inside the male connector (503). A pressure gauge (505) is connected to the other side of the top of the mounting head (502).

3. The field calibration device for FGS gas sensor detection according to claim 2, characterized in that: The turnover trolley (1) is provided with multiple accommodating parts for accommodating the standard gas cylinder (901). Each accommodating part is provided with a gas cylinder back frame (6). The gas cylinder back frame (6) is fixedly installed on the bearing surface of the turnover trolley (1) by a fixing strap (604).

4. The field calibration device for FGS gas sensor detection according to claim 3, characterized in that: The gas cylinder back frame (6) includes a back plate (601), a gas cylinder fixing rope (602) is fixedly installed on the top of the back of the back plate (601), a gas cylinder fixing bracket (603) is fixedly installed on the bottom of the back of the back plate (601), and a support connecting strap (605) is fixedly installed on both sides of the front of the back plate (601). The bottom of the support connecting strap (605) is fixed on the fixing strap (604). The carbon fiber gas cylinder (3) or the aluminum alloy gas cylinder (4) can be sleeved on the inside of the gas cylinder fixing rope (602) and the gas cylinder fixing bracket (603).

5. The field calibration device for FGS gas sensor detection according to any one of claims 2-4, characterized in that: The custom connector (5) is connected to the pipeline via a quick connector structure (8), which includes a first pipe body (801) and a second pipe body (806). The first pipe body (801) is used to connect the custom connector (5) or the pipeline, and the second pipe body (806) is used to connect the pipeline or the custom connector (5). The outer side of the first tube body (801) is fitted with a tube diameter sleeve (809). The outer side of the second tube (806) is fitted with a shell (807), and the outer side of the shell (807) is fitted with a tube sleeve (808). The inner side of the tube sleeve (808) is provided with a locking device (802) for cooperating with the end of the first tube (801).

6. The field calibration device for FGS gas sensor detection according to claim 1, characterized in that: The valve body includes a pressure regulating valve (903), a three-way switching valve (904), a solenoid valve (905), a pressure relief valve (908), a gas cylinder valve (909), and a vent valve (912). The pressure gauges include a first pressure gauge (902) and a second pressure gauge (910), wherein: The output end of the standard gas cylinder (901) is connected to the first pressure gauge (902), the output end of the first pressure gauge (902) is connected to the pressure regulating valve (903), the other end of the pressure regulating valve (903) is connected to the three-way switching valve (904), the second passage of the three-way switching valve (904) is connected to the solenoid valve (905), the third passage of the three-way switching valve (904) is connected to the pressure relief valve (908) through the manifold, the output end of the pressure relief valve (908) is connected to the gas cylinder valve (909), the output end of the gas cylinder valve (909) is connected to the dispensing gas cylinder (911), the second pressure gauge (910) is installed between the gas cylinder valve (909) and the dispensing gas cylinder (911), the output end of the dispensing gas cylinder (911) is connected to the venting valve (912), and the output end of the solenoid valve (905) is connected to the flow meter (907). The output control terminal of the portable dynamic dilution instrument (906) is connected to the input terminals of the pressure regulating valve (903), the three-way switching valve (904), and the solenoid valve (905) via wires; The input terminal of the portable dynamic dilution device (906) is electrically connected to the output terminals of the first pressure gauge (902) and the flow meter (907) via wires.

7. The field calibration device for FGS gas sensor detection according to claim 6, characterized in that: The standard gas cylinder (901), the first pressure gauge (902), the pressure regulating valve (903), the three-way switching valve (904), the solenoid valve (905), the portable dynamic dilution device (906), the flow meter (907), the pressure relief valve (908), the gas cylinder valve (909), the second pressure gauge (910), the vent valve (912), and the dispensing gas cylinder (911) are all equipped with a double ferrule sealing structure (7) between themselves and the pipeline.

8. The field calibration device for FGS gas sensor detection according to claim 7, characterized in that: The sealing structure (7) includes a pipe body (701) and a compression fitting body (705), wherein: The compression fitting body (705) is movably sleeved on the outside of the pipe body (701). The outer side of the compression fitting body (705) is threaded with a connecting nut (704). A locking ring (702) is installed on the outer side of the pipe body (701). A compression sealing ring (703) is fixedly sleeved on the inner side of the compression fitting body (705).

9. The field calibration device for FGS gas sensor detection according to any one of claims 6-8, characterized in that: The number of the standard gas cylinder (901), the first pressure gauge (902), the pressure regulating valve (903), the three-way switching valve (904), and the solenoid valve (905) is at least one set.

10. The field calibration device for FGS gas sensor detection according to any one of claims 1-4, characterized in that: It also includes a power supply module (10), wherein: The input terminal of the portable dynamic dilution device (906) is adapted to the output terminal of the power supply module (10).

Images