A portable backpack-type gas metering and verification system

Abstract

This invention provides a portable backpack-style gas metering and calibration system, comprising a backpack and calibration components. A number of positioning components and partitions are sequentially spaced on the base. The calibration components include four standard gas cylinders, a switching valve, a mixing valve, a magnetic quick-connect assembly, a high-precision gas detector, a temperature and humidity detection module, and a timing module. By incorporating the switching valve, mixing valve, magnetic quick-connect assembly, high-precision gas detector, and calibration cover, the system enables rapid connection of pipelines via magnetism. The magnetic connection port facilitates both connection and disconnection, significantly improving work efficiency. The addition of verification equipment to the gas detector measurement process, integrated into the pipeline, allows for more accurate evaluation of measurement results. This invention can significantly improve the work efficiency of calibration or verification personnel, reduce the workload of metrology personnel, improve the accuracy of on-site measurement, ensure the effectiveness and safety of on-site gas detection alarms, and protect the safety of people's lives and property.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, specifically a portable backpack-type gas metering and verification system. Background Technology

[0002] Gas detection alarms are directly related to the safety of personnel and assets, as well as environmental pollution. In locations with gas leaks, such as gas stations, oil depots, and chemical plants, the lack of timely alarms can lead to fires and explosions, posing a serious threat to people's lives and property. Regularly testing the performance and accuracy of combustible gas alarms ensures they can issue timely warning signals in dangerous situations, thus protecting personnel and assets. As combustible gas alarms age, the sensitivity of their internal sensors gradually decreases. The sensor is a key component in combustible gas alarms for detecting gas concentration; if the sensor malfunctions, false alarms or missed alarms can occur, causing significant problems for on-site personnel. Therefore, regular testing and calibration of combustible gas alarms ensures sensor performance and accuracy, improving the alarm's accuracy and reliability.

[0003] Currently, according to regulations or standards, it is necessary to carry at least three concentration bottles of standard gas, one zero-point gas bottle, a stopwatch, walkie-talkie, thermometer / hygrometer, telescopic pole, etc. This involves a considerable amount of equipment, which is scattered and inconvenient for on-site calibration personnel to carry and operate, significantly reducing calibration efficiency. Furthermore, the valves, gas pipelines, calibration hoods, etc., can adsorb standard gases, especially trace amounts of low-concentration standard gases, having a greater impact. Additionally, due to the uncertainty of the on-site environment, the impact on the test data is often unpredictable. Therefore, data verification is also necessary to assess the impact of intermediate steps on the measurement results. Summary of the Invention

[0004] The purpose of this invention is to provide a portable backpack-type gas metering and verification system, which can significantly improve the work efficiency of verification or calibration personnel, reduce the workload of metrology personnel, improve the accuracy of on-site measurement, ensure the effectiveness and safety of on-site gas detection alarms, and protect people's lives and property.

[0005] To achieve the above objectives, the present invention proposes the following technical solution: a portable backpack-type gas metering and verification system, comprising:

[0006] Backpack (100), the backpack (100) includes a storage compartment (101) and shoulder straps. The bottom of the storage compartment (101) is fixedly connected to a base (103). The base (103) is provided with a plurality of positioning components (105) and partitions (104) at intervals. The positioning components (105) are used to place standard gas cylinders and position them to prevent them from tipping over. The partitions (104) are provided with limit components (107). The limit components (107) are used to prevent the standard gas cylinders from shaking up and down. A pull rope (106) is provided between the positioning components (105) and the limit components (107). The positioning components (105) work in cooperation with the limit components (10) through the pull rope.

[0007] A calibration component (200) is mounted on a backpack (100). The calibration component (200) includes four standard gas cylinders, a switching valve (207), a mixing valve (208), a magnetic quick-connect assembly (209), a high-precision gas detector (210), a temperature and humidity detection module (212), and a timing module (213). The temperature and humidity detection module (211) and the timing module (212) are mounted on the backpack (100). The four standard gas cylinders are a zero-point gas cylinder (201), a low-concentration gas cylinder (202), a medium-concentration gas cylinder (203), and a... The high-concentration gas cylinder (204), the zero-point gas cylinder (201), the low-concentration gas cylinder (202), the medium-concentration gas cylinder (203), and the high-concentration gas cylinder (204) are all equipped with constant flow valves (205) on their tops. The constant flow valves (205) are all connected to switching valves (207) through gas pipelines (206). The switching valves (207) are connected to mixing valves (208) through pipelines. A magnetic quick-connect assembly (209) is provided between the mixing valve (208) and the high-precision gas detector (210). The magnetic quick-connect assembly (209) can switch the gas flow direction.

[0008] After the mixed gas passes through the mixing valve (208), flow direction one is defined. The mixed gas is controlled by the magnetic quick connection component (209) to enter the high-precision gas detector (210) for detection, and then passes through the calibration chamber (214) for detection by the gas detection alarm (213) to be calibrated. Flow direction two is defined. The mixed gas is controlled by the magnetic quick connection component (209) to enter the calibration chamber (214) for detection by the gas detection alarm (213) to be calibrated. After the mixed gas comes out of the calibration chamber (214), it enters the high-precision gas detector (210) for detection.

[0009] Furthermore, in this invention, the backpack (100) is made of nylon, Oxford cloth or polyester fabric, and the top of the storage compartment (101) is connected to a sealing cloth (102) by a zipper.

[0010] Furthermore, in this invention, the positioning component (105) includes a positioning seat (105a), into which a standard gas cylinder can be inserted. Both sides of the positioning seat (105a) are movably connected to a limiting clamp (105b) via a rotating shaft. The top and bottom parts of one side of the limiting clamp (105b) are respectively fixedly connected to a first elastic element (105d) and a second elastic element (105c). The other side of the limiting clamp (105b) has an inclined surface (105e). When the standard gas cylinder is placed into the positioning seat (105a), it drives the limiting clamp (105b) to rotate. The limiting clamp (105b) simultaneously compresses the second elastic element (105c) and pulls the first elastic element (105d). The limiting clamp (105b) can pull the pulling rope (106). Rubber pads are provided on the surfaces of the limiting clamp (105b) that contact the standard gas cylinder to increase friction.

[0011] Furthermore, in this invention, the limiting component (107) includes a fixed box (107a), a movable stop (107b), a movable rod (107c), and an arc-shaped limiting block (107f). The fixed box (107a) is installed through the partition (104), and the movable stop (107b) passes through the fixed box (107a). The bottom of the fixed box (107a) is provided with a sliding hole (107g) that is adapted to the movable stop (107b). One end of the pulling rope (106) is fixedly connected to the movable stop (107b). The bottom of the movable stop (107b) is provided with a reset component (108), which is used to restore the movable stop (107b) to its initial state.

[0012] The reset assembly (108) includes a support block (108a) and a fourth elastic element (108b). The support block (108a) is fixedly connected to the bottom of the fixed box (107a). One end of the fourth elastic element (108b) is fixedly connected to the support block (108a), and the other end of the fourth elastic element (108b) is fixedly connected to the movable stop (107b).

[0013] A third elastic element (107e) is fixedly connected to the rear end of the movable rod (107c), and a fixed stop block (107d) is fixedly connected to the bottom of the movable rod (107c). Initially, the third elastic element (107e) at the rear end of the movable rod (107c) is in a compressed state, and the movable stop block (107b) is located on one side of the fixed stop block (107d) to block the fixed stop block (107d). In the active state, the movable stop block (107b) moves down and disengages from the fixed stop block (107d). The third elastic element (107e) drives the movable rod (107c) and the arc-shaped limiting block (107f) to move. The arc-shaped limiting block (107f) is fixedly connected to the end of the movable rod (107c) and is used to limit the vertical movement of the standard gas cylinder.

[0014] Furthermore, in this invention, the magnetic quick-connect assembly (209) includes a first magnetic connecting tube (209a), a second magnetic connecting tube (209b), and a third magnetic connecting tube (209c). A ring-shaped strong magnet (209d) is installed at the port of each of the first, second, and third magnetic connecting tubes (209a, 209b, and 209c). The surface of each ring-shaped strong magnet (209d) is coated with a rubber coating. The first magnetic connecting tube (209a) is connected to a mixing valve (208), the second magnetic connecting tube (209b) leads to a high-precision gas detector (210), and the third magnetic connecting tube (209c) leads to a calibration cover (214). A connecting pipe is provided between the high-precision gas detector (210) and the calibration cover (214).

[0015] Furthermore, in this invention, the annular strong magnet (209d) of the first magnetic connecting tube (209a) has different magnetic poles from the annular strong magnets (209d) of the second magnetic connecting tube (209b) and the third magnetic connecting tube (209c). When the annular strong magnet (209d) of the first magnetic connecting tube (209a) approaches the annular strong magnets (209d) of the second magnetic connecting tube (209b) and the third magnetic connecting tube (209c), they attract each other and connect the ports. When disconnection is required, the two ends can be directly pulled apart. The rubber coating of the annular strong magnet (209d) can prevent air leakage. After connection, the port can withstand an air pressure of P:

[0016]

[0017] Where N is the magnetic force between the two annular strong magnets (209d), and S is the cross-sectional area of ​​the inner diameter of the annular strong magnet (209d). Under the condition that the magnetic force remains unchanged, the air pressure that the interface can withstand can be adjusted by changing the inner diameter of the annular strong magnet (209d).

[0018] Furthermore, the present invention also includes a filling assembly (300), which includes a one-way inlet valve male connector (301), a one-way inlet valve female connector (302), a large-volume standard gas cylinder (303), and a pressure reducing valve (304). The pressure reducing valve (304) is located on the top of the large-volume standard gas cylinder (303). The one-way inlet valve female connector (302) is connected to the pressure reducing valve (304). One end of the one-way inlet valve male connector (301) is connected to the standard gas cylinder, and the other end of the one-way inlet valve male connector (301) is connected to the one-way inlet valve female connector (302). The filling pressure is controlled by adjusting the pressure reducing valve (304).

[0019] Furthermore, in this invention, the calibration cover (214) includes a cover body (214a) and a clamping member (214b). The top of the cover body (214a) is funnel-shaped and made of rubber. The cover body (214a) is provided with an air inlet (214c) and an air outlet (214d). The clamping member (214b) is sleeved on the outside of the rubber cover body (214a). When the detection tube (213a) at the bottom of the gas detection alarm (213) contacts the inside of the rubber cover body (214a), the clamping member (214b) tightens, so that the inside of the rubber cover body (214a) is in close contact with the detection tube (213a) to achieve a sealing effect.

[0020] Furthermore, in this invention, the clamping member (214b) is a spring clip or a mechanical clamping arm.

[0021] Furthermore, in this invention, the partition (104) has a pipe hole (109) for the pipe to pass through.

[0022] Beneficial effects: The technical solution of this application has the following technical effects:

[0023] 1. This invention can significantly improve the work efficiency of verification or calibration personnel, reduce the workload of metrology personnel, improve the accuracy of on-site metrology, ensure the effectiveness and safety of on-site gas detection alarms, and protect people's lives and property.

[0024] 2. By setting up a backpack (100), the present invention can place standard gas cylinders in the backpack (100) for easy carrying. The backpack (100) is equipped with a base (103), a partition (104), a positioning component (105) and a limiting component (107), which can make the standard gas cylinders stably and quickly placed in the backpack and can also be quickly taken out, maintaining stability and safety during use and transportation, and making it more convenient and faster for users.

[0025] 3. By setting up a switching valve (207), a mixing valve (208), a magnetic quick-connect assembly (209), a high-precision gas detector (210), and a calibration cover (214), it is possible to quickly connect pipelines using magnetism. The magnetic connection port facilitates both connection and disconnection, significantly improving work efficiency. Adding verification equipment to the gas detector measurement process and integrating it into the pipeline allows for more accurate evaluation of measurement results and can also help solve some difficult problems encountered during measurement. Through gas mixing and the setting of the verification equipment, a portable and simple device for diluting standard gases is realized, which can dynamically display gas concentration values ​​in real time.

[0026] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered part of the inventive subject matter of this disclosure, provided that such concepts do not contradict each other.

[0027] The foregoing and other aspects, embodiments, and features of the teachings of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0028] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the structure of the present invention.

[0030] Figure 2 This is a partial structural diagram of the present invention.

[0031] Figure 3 This is a schematic diagram showing the installation and placement of the standard gas cylinder of this invention.

[0032] Figure 4 This is a schematic diagram of the installation and placement of the standard gas cylinder of the present invention (when removed).

[0033] Figure 5 For the present invention Figure 4 Enlarged view of the local structure of A in the diagram.

[0034] Figure 6 This is a schematic diagram illustrating the use of the magnetic quick-connect component of the present invention.

[0035] Figure 7 This is a schematic diagram of the standard gas filling process of the present invention.

[0036] Figure 8 This is a schematic diagram illustrating the use of the calibration cover of the present invention.

[0037] Figure 9 This is a schematic diagram of the system principle of the present invention.

[0038] The meanings of the reference numerals in the figures are as follows: 100, backpack; 101, compartment; 102, sealing cloth; 103, base; 104, partition; 105, positioning component; 106, pull rope; 107, limiting component; 108, reset component; 109, tube hole; 105a, positioning seat; 105b, limiting clamp; 105c, second elastic element; 105d, first elastic element; 107a, fixing box; 107b, movable stop; 107c, movable rod; 107d, fixed stop; 107e, third elastic element; 107f, arc-shaped limiting block; 107g, sliding hole; 108a, support block; 108b, fourth elastic element;

[0039] 200. Calibration Components; 201. Zero-point Gas Cylinder; 202. Low-concentration Gas Cylinder; 203. Medium-concentration Gas Cylinder; 204. High-concentration Gas Cylinder; 205. Constant Flow Valve; 206. Gas Pipeline; 207. Switching Valve; 208. Mixing Valve; 209. Magnetic Quick-Connect Components; 210. High-precision Gas Detector; 211. Temperature and Humidity Detection Module; 212. Timing Module; 213. Gas Detection Alarm; 213a. Detection Tube 214. Calibration cover; 214a. Cover body; 214b. Clamping component; 214c. Air inlet; 214d. Air outlet; 209a. First magnetic connecting tube; 209b. Second magnetic connecting tube; 209c. Third magnetic connecting tube; 209d. Ring-shaped strong magnet; 300. Filling assembly; 301. One-way air inlet valve male connector; 302. One-way air inlet valve female connector; 303. Large-volume standard gas cylinder; 304. Pressure reducing valve. Detailed Implementation

[0040] To better understand the technical content of this invention, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of the invention are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this invention are not limited to any particular implementation. Furthermore, some aspects of this invention can be used alone or in any suitable combination with other aspects of this invention. As shown in the following figures.

[0041] Example 1

[0042] like Figure 1-9As shown, a portable backpack-type gas metering and verification system includes a backpack 100 and verification components 200. The backpack 100 includes a storage compartment 101 and shoulder straps. The backpack 100 is made of nylon. The top of the storage compartment 101 is connected to a sealing cloth 102 via a zipper. According to the verification procedures or calibration specifications, by setting up a portable backpack, standard gas cylinders and related verification equipment can be integrated onto the backpack. Timers and thermometers / hygrometers can be integrated into the portable backpack, solving the problem of scattered components and facilitating simultaneous operation and observation. The timer is required to be small in size, easy to operate, and have a graduation value ≤0.1s. The thermometer / hygrometer is required to be small in size, easy to observe, and not affect the normal operation of gas components. The temperature range is 0~50℃; the humidity range is 10%RH~95%RH.

[0043] Specifically, a base 103 is fixedly connected to the bottom of the receiving chamber 101. Several positioning components 105 and partitions 104 are sequentially and spaced apart on the base 103. The positioning components 105 are used to place and position the standard gas cylinders to prevent them from tipping over. Limiting components 107 are provided on the partitions 104 to prevent the standard gas cylinders from swaying up and down. A pull rope 106 is provided between the positioning components 105 and the limiting components 107, and the positioning components 105 work in conjunction with the limiting components 107 via the pull rope. During use, the sealing cloth 102 is opened, and the standard gas cylinder is placed on the base 103. The partitions 104 prevent the gas cylinders from colliding. Pipe holes 109 are provided on the partitions 104 for pipes to pass through, facilitating pipe support. At this time, the standard gas cylinder will be clamped by the positioning component 105 to prevent it from tipping over. The base 103 has a certain height. When the positioning component 105 clamps the standard gas cylinder, the positioning component 105 will activate the limiting component 107 through the pull rope 106. The arc-shaped limiting block 107f of the limiting component 107 can lock the top of the standard gas cylinder to prevent it from shaking up and down or shifting due to violent movement when the user carries the backpack. This helps to extend the service life of the standard gas cylinder.

[0044] In this embodiment, the calibration component 200 is mounted on the backpack 100. The calibration component 200 includes four standard gas cylinders, a switching valve 207, a mixing valve 208, a magnetic quick-connect component 209, a high-precision gas detector 210, a temperature and humidity detection module 212, and a timing module 213. The temperature and humidity detection module 211 and the timing module 212 are mounted on the backpack 100. The temperature and humidity detection module 212 and the timing module 213 are a temperature and humidity meter and a timer, respectively. They are integrated into the portable backpack-type gas detector field measurement device to solve the problem of being scattered and to facilitate synchronous operation and observation. The four standard gas cylinders are a zero-point gas cylinder 201, a low-concentration gas cylinder 202, a medium-concentration gas cylinder 203, and a high-concentration gas cylinder 204.

[0045] The top of the zero-point gas cylinder 201, the low-concentration gas cylinder 202, the medium-concentration gas cylinder 203, and the high-concentration gas cylinder 204 are all equipped with constant flow valves 205. The constant flow valves 205 are all connected to switching valves 207 through gas pipelines 206. The switching valves 207 are connected to mixing valves 208 through pipelines. A magnetic quick-connect component 209 is provided between the mixing valve 208 and the high-precision gas detector 210. The magnetic quick-connect component 209 can switch the gas flow direction.

[0046] During use, the standard gases in the zero-point cylinder 201, low-concentration cylinder 202, medium-concentration cylinder 203, and high-concentration cylinder 204 enter the switching valve 207 and mixing valve 208 through their respective constant flow valves 205 and gas pipelines 206. The magnetic quick-connect assembly 209 can form two flow directions. A high-precision gas detector 210 is integrated into the pipeline. The high-precision gas detector 210 verifies the validity of the measurement results, visualizes the measurement process, and promptly resolves various difficult problems in the measurement process, improving work efficiency. Then, in conjunction with the mixing valve 208, a high-low concentration mixing system is formed. The high-precision gas detector 210 sets the dilution gas value, diluting the gas to the required concentration to meet the customer's specific concentration point requirements, and then sends it to the gas detection alarm 213 for detection.

[0047] After the mixed gas passes through the mixing valve 208, the magnetic quick-connect assembly 209 can form two flow directions. The first flow direction involves the mixed gas entering the high-precision gas detector 210 for detection, then passing through the calibration chamber 214 and being detected by the gas detector alarm 213. The second flow direction involves the mixed gas entering the calibration chamber 214, being detected by the gas detector alarm 213, and then exiting the calibration chamber 214 before entering the high-precision gas detector 210 for detection. The magnetic quick-connect assembly 209 includes high-strength magnets that can be installed at both ends of the pipeline, achieving quick pipeline connection via magnetism. The magnetic connection port allows for operation in less than 1 second, facilitating both connection and disconnection, enabling one-handed operation and significantly improving work efficiency.

[0048] Example 2

[0049] like Figure 1-8The difference between this embodiment and embodiment 1 is that the positioning component 105 includes a positioning seat 105a, into which a standard gas cylinder can be inserted. Both sides of the positioning seat 105a are movably connected to a limiting clamp 105b via a rotating shaft. The top and bottom parts of one side of the 105b are respectively fixedly connected to a first elastic element 105d and a second elastic element 105c. The other side of the limiting clamp 105b has an inclined surface 105e. When the standard gas cylinder is placed into the positioning seat 105a, it drives the limiting clamp 105b to rotate. At the same time, the limiting clamp 105b compresses the second elastic element 105c and pulls the first elastic element 105d. The limiting clamp 105b can pull the pulling rope 106. Rubber pads are provided on the surfaces of the limiting clamp 105b that contact the standard gas cylinder to increase friction.

[0050] The limiting component 107 includes a fixed box 107a, a movable stop 107b, a movable rod 107c, and an arc-shaped limiting block 107f. The fixed box 107a is installed through the partition 104, and the movable stop 107b is installed through the fixed box 107a. The bottom of the fixed box 107a is provided with a sliding hole 107g that is adapted to the movable stop 107b. One end of the pull rope 106 is fixedly connected to the movable stop 107b. The bottom of the movable stop 107b is provided with a reset component 108, which is used to restore the movable stop 107b to its initial state.

[0051] The reset assembly 108 includes a support block 108a and a fourth elastic member 108b. The support block 108a is fixedly connected to the bottom of the fixed box 107a. One end of the fourth elastic member 108b is fixedly connected to the support block 108a, and the other end of the fourth elastic member 108b is fixedly connected to the movable stop block 107b.

[0052] A third elastic element 107e is fixedly connected to the rear end of the movable rod 107c, and a fixed stop block 107d is fixedly connected to the bottom of the movable rod 107c. Initially, the third elastic element 107e at the rear end of the movable rod 107c is in a compressed state, and the movable stop block 107b is located on one side of the fixed stop block 107d to block the fixed stop block 107d. In the active state, the movable stop block 107b moves down and disengages from the fixed stop block 107d. The third elastic element 107e drives the movable rod 107c and the arc-shaped limiting block 107f to move. The arc-shaped limiting block 107f is fixedly connected to the end of the movable rod 107c and is used to limit the vertical movement of the standard gas cylinder.

[0053] In this embodiment, the first elastic element 105d, the second elastic element 105c, the third elastic element 107e, and the fourth elastic element 108b are all springs.

[0054] When the standard gas cylinder is placed into the positioning seat 105a, it causes the limiting clamp 105b to rotate. At the same time, the limiting clamp 105b compresses the second elastic element 105c and pulls the first elastic element 105d. The limiting clamp 105b can pull the pulling rope 106. Rubber pads are provided on the surfaces of the limiting clamp 105b and the standard gas cylinder to increase friction, thereby clamping the gas cylinder. At this time, the pulling rope 106 pulls the movable stop 107b down. The movable stop 107b will compress the fourth elastic element 108b. The downward movement of the movable stop 107b will release the obstruction of the fixed stop 107d. At this time, the compressed third elastic element 107e will drive the movable rod 107c to move. The movable rod 107c drives the arc-shaped limiting block 107f to lock the top of the standard gas cylinder, restricting the standard gas cylinder from shaking up and down. When it is necessary to remove the standard gas cylinder, simply push the movable rod 107c back to the through-fixed box 107a. At this time, due to the return of the first elastic element 105d and the second elastic element 105c, the pulling rope 106 will be in a slack state. The fourth elastic element 108b will reset, causing the movable stop 107b to reset and block the fixed stop 107d again, thereby completing the removal action.

[0055] Example 3

[0056] Unlike the embodiments described above, as Figure 6 The magnetic quick-connect assembly 209 includes a first magnetic connecting tube 209a, a second magnetic connecting tube 209b, and a third magnetic connecting tube 209c. Each of the ports of the first magnetic connecting tube 209a, the second magnetic connecting tube 209b, and the third magnetic connecting tube 209c is equipped with a ring-shaped strong magnet 209d. The surface of each ring-shaped strong magnet 209d is coated with a rubber coating. The first magnetic connecting tube 209a is connected to the mixing valve 208, the second magnetic connecting tube 209b leads to the high-precision gas detector 210, and the third magnetic connecting tube 209c leads to the calibration cover 214. A connecting pipe is provided between the high-precision gas detector 210 and the calibration cover 214.

[0057] The annular strong magnet 209d of the first magnetic connecting tube 209a has different magnetic poles from the annular strong magnets 209d of the second magnetic connecting tube 209b and the third magnetic connecting tube 209c. When the annular strong magnet 209d of the first magnetic connecting tube 209a approaches the annular strong magnets 209d of the second magnetic connecting tube 209b and the third magnetic connecting tube 209c, they attract each other and connect the ports. To disconnect, simply pull the two ends apart. The rubber coating of the annular strong magnet 209d prevents air leakage. After connection, the port can withstand an air pressure of P:

[0058]

[0059] Where N is the magnetic force between the two annular strong magnets 209d, and S is the cross-sectional area of ​​the inner diameter of the annular strong magnet 209d. Under the condition that the magnetic force remains unchanged, the air pressure that the interface can withstand can be adjusted by changing the inner diameter of the annular strong magnet 209d.

[0060] The aforementioned magnetic quick-connect gas interface boasts excellent sealing performance, an operation time of less than 1 second, and withstands a gas pressure of not less than 0.5 MPa. It enables rapid connection of pipelines via magnetism. The magnetic connection port facilitates both connection and disconnection, significantly improving work efficiency. The first flow direction involves the mixed gas passing through the magnetic quick-connect component 209 and entering the high-precision gas detector 210 for detection, then passing through the calibration chamber 214 and being detected by the gas detector alarm 213. The second flow direction involves the mixed gas passing through the magnetic quick-connect component 209 and entering the calibration chamber 214, being detected by the gas detector alarm 213, and then exiting the calibration chamber 214 before entering the high-precision gas detector 210 for detection. The magnetic quick-connect component 209 includes high-strength magnets that can be installed at both ends of the pipeline, enabling rapid connection via magnetism. The magnetic connection port allows for operation in less than 1 second, facilitating both connection and disconnection, and enabling one-handed operation, significantly improving work efficiency.

[0061] Example 4

[0062] like Figure 7 Unlike the above embodiments, this embodiment also includes a filling assembly 300. The filling assembly 300 includes a one-way inlet valve male connector 301, a one-way inlet valve female connector 302, a large-volume standard gas cylinder 303, and a pressure reducing valve 304. The pressure reducing valve 304 is located on the top of the large-volume standard gas cylinder 303. The one-way inlet valve female connector 302 is connected to the pressure reducing valve 304. One end of the one-way inlet valve male connector 301 is connected to the standard gas cylinder, and the other end of the one-way inlet valve male connector 301 is connected to the one-way inlet valve female connector 302. The filling pressure is controlled by adjusting the pressure reducing valve 304.

[0063] According to the filling design diagram Figure 7 The constant flow valve 205 is connected to the male connector 301 of the one-way inlet valve. The constant flow valve is installed on a 1.7L empty standard gas cylinder, ready for filling. One end of the female connector 302 of the one-way inlet valve is connected to the pressure reducing valve 304 on the 4L large-volume standard gas cylinder 303. Then, the other end of the female connector 302 of the one-way inlet valve is connected to the male connector 301 of the one-way inlet valve of the constant flow valve. The main valve of the 4L large-volume standard gas cylinder 303 is opened. By adjusting the pressure reducing valve 304, which is equipped with a pressure gauge and a metering gauge, the filling pressure is controlled, and filling can be completed.

[0064] Example 5

[0065] like Figure 8As shown, unlike the above embodiment, the calibration cover 214 includes a cover body 214a and a clamping member 214b. The top of the cover body 214a is funnel-shaped and made of rubber. The cover body 214a is provided with an air inlet 214c and an air outlet 214d. The clamping member 214b is sleeved on the outside of the rubber cover body 214a. When the detection tube 213a at the bottom of the gas detector alarm 213 contacts the inside of the rubber cover body 214a, the clamping member 214b tightens, so that the inside of the rubber cover body 214a and the detection tube 213a are in close contact to achieve a sealing effect. The clamping member 214b is a spring buckle or a mechanical clamping arm.

[0066] In use, a larger diameter cover 214a is used. The top of the cover 214a is made of funnel-shaped rubber material, which allows the probe of the detection tube 213a at the bottom of the gas detector alarm 213 to press against the inner rubber layer, achieving a sealing effect. After the probe presses against the rubber layer, the outside of the cover 214a is clamped with spring clips to secure the gas detector detection tube 213a. The bottom of the funnel-shaped rubber layer is connected to two gas passages, one inlet and one outlet, allowing the standard gas to quickly vent any remaining gas at the bottom of the funnel, thus meeting the measurement requirements.

[0067] In summary, this invention can significantly improve the work efficiency of verification or calibration personnel, reduce the workload of metrology personnel, improve the accuracy of on-site metrology, ensure the effectiveness and safety of on-site gas detection alarms, and protect the safety of people's lives and property.

[0068] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A portable backpack-style gas metering and verification system, characterized in that: include: Backpack (100), the backpack (100) includes a storage compartment (101) and shoulder straps. The bottom of the storage compartment (101) is fixedly connected to a base (103). The base (103) is provided with a plurality of positioning components (105) and partitions (104) at intervals. The positioning components (105) are used to place standard gas cylinders and position them to prevent them from tipping over. The partitions (104) are provided with limit components (107). The limit components (107) are used to prevent the standard gas cylinders from shaking up and down. A pull rope (106) is provided between the positioning components (105) and the limit components (107). The positioning components (105) work in cooperation with the limit components (107) through the pull rope. The positioning component (105) includes a positioning seat (105a) and a limiting clamp (105b). When the standard gas cylinder is placed into the positioning seat (105a), it drives the limiting clamp (105b) to rotate. The limiting clamp (105b) can pull the pulling rope (106). The limiting component (107) includes a fixed box (107a), a movable stop (107b), a movable rod (107c), and an arc-shaped limiting block (107f). The fixed box (107a) is installed through the partition (104), and the movable stop (107b) is installed through the fixed box (107a). The bottom of the fixed box (107a) is provided with a sliding hole (107g) that is adapted to the movable stop (107b). One end of the pulling rope (106) is fixedly connected to the movable stop (107b), and a reset component (108) is provided at the bottom of the movable stop (107b). A third elastic element (107e) is fixedly connected to the rear end of the movable rod (107c), and a fixed stop block (107d) is fixedly connected to the bottom of the movable rod (107c). Initially, the third elastic element (107e) at the rear end of the movable rod (107c) is in a compressed state, and the movable stop block (107b) is located on one side of the fixed stop block (107d) to block the fixed stop block (107d). In the active state, the movable stop block (107b) moves down and disengages from the fixed stop block (107d). The third elastic element (107e) drives the movable rod (107c) and the arc-shaped limiting block (107f) to move. The arc-shaped limiting block (107f) is fixedly connected to the end of the movable rod (107c). The arc-shaped limiting block (107f) is used to limit the vertical movement of the standard gas cylinder. A calibration component (200) is mounted on a backpack (100). The calibration component (200) includes four standard gas cylinders, a switching valve (207), a mixing valve (208), a magnetic quick-connect assembly (209), a high-precision gas detector (210), a temperature and humidity detection module (211), and a timing module (212). The temperature and humidity detection module (211) and the timing module (212) are mounted on the backpack (100). The four standard gas cylinders are a zero-point gas cylinder (201), a low-concentration gas cylinder (202), a medium-concentration gas cylinder (203), and a... A constant flow valve (205) is provided on the top of each of the high-concentration gas cylinder (204), zero-point gas cylinder (201), low-concentration gas cylinder (202), medium-concentration gas cylinder (203), and high-concentration gas cylinder (204). The constant flow valve (205) is connected to a switching valve (207) through a gas pipeline (206). The switching valve (207) is connected to a mixing valve (208) through a pipeline. A magnetic quick-connect assembly (209) is provided between the mixing valve (208) and the high-precision gas detector (210). The magnetic quick-connect assembly (209) can switch the gas flow direction. After the mixed gas passes through the mixing valve (208), flow direction one is defined. The mixed gas is controlled by the magnetic quick connection component (209) to enter the high-precision gas detector (210) for detection, and then passes through the calibration chamber (214) for detection by the gas detection alarm (213) to be calibrated. Flow direction two is defined. The mixed gas is controlled by the magnetic quick connection component (209) to enter the calibration chamber (214) for detection by the gas detection alarm (213) to be calibrated. After the mixed gas comes out of the calibration chamber (214), it enters the high-precision gas detector (210) for detection.

2. The portable backpack-type gas metering and verification system according to claim 1, characterized in that: The backpack (100) is made of nylon, Oxford cloth or polyester fabric, and the top of the compartment (101) is connected to a zippered cover (102).

3. The portable backpack-type gas metering and verification system according to claim 1, characterized in that: The positioning seat (105a) is movably connected to the limiting clamp (105b) on both sides of the interior via a rotating shaft. The top and bottom parts of one side of the limiting clamp (105b) are respectively fixedly connected to a first elastic element (105d) and a second elastic element (105c). The other side of the limiting clamp (105b) has an inclined surface (105e). When the standard gas cylinder is placed into the positioning seat (105a), it drives the limiting clamp (105b) to rotate. At the same time, the limiting clamp (105b) compresses the second elastic element (105c) and pulls the first elastic element (105d). The limiting clamp (105b) can pull the pulling rope (106). Rubber pads are provided on the surfaces of the limiting clamp (105b) and the standard gas cylinder to increase friction.

4. The portable backpack-type gas metering and verification system according to claim 3, characterized in that: The reset assembly (108) is used to restore the movable stop (107b) to its initial state. The reset assembly (108) includes a support block (108a) and a fourth elastic member (108b). The support block (108a) is fixedly connected to the bottom of the fixed box (107a). One end of the fourth elastic member (108b) is fixedly connected to the support block (108a), and the other end of the fourth elastic member (108b) is fixedly connected to the movable stop (107b).

5. A portable backpack-type gas metering and verification system according to claim 4, characterized in that: The magnetic quick-connect assembly (209) includes a first magnetic connecting tube (209a), a second magnetic connecting tube (209b), and a third magnetic connecting tube (209c). A ring-shaped strong magnet (209d) is installed at the port of each of the first magnetic connecting tube (209a), the second magnetic connecting tube (209b), and the third magnetic connecting tube (209c). The surface of the ring-shaped strong magnet (209d) is coated with a rubber coating. The first magnetic connecting tube (209a) is connected to the mixing valve (208), the second magnetic connecting tube (209b) leads to the high-precision gas detector (210), and the third magnetic connecting tube (209c) leads to the calibration cover (214). A connecting pipe is provided between the high-precision gas detector (210) and the calibration cover (214).

6. A portable backpack-type gas metering and verification system according to claim 5, characterized in that: The annular strong magnet (209d) of the first magnetic connecting tube (209a) has different magnetic poles from the annular strong magnets (209d) of the second magnetic connecting tube (209b) and the third magnetic connecting tube (209c). When the annular strong magnet (209d) of the first magnetic connecting tube (209a) approaches the annular strong magnets (209d) of the second magnetic connecting tube (209b) and the third magnetic connecting tube (209c), they attract each other and connect the ports. To disconnect, simply pull the two ends apart. The rubber coating of the annular strong magnet (209d) prevents air leakage. After connection, the port can withstand an air pressure of P: ； Where N is the magnetic force between the two ring-shaped strong magnets (209d), and S is the cross-sectional area of ​​the inner diameter of the ring-shaped strong magnet (209d). Under the condition that the magnetic force remains unchanged, the air pressure that the interface can withstand can be adjusted by changing the inner diameter of the ring-shaped strong magnet (209d).

7. The portable backpack-type gas metering and verification system according to claim 1, characterized in that: It also includes a filling assembly (300), which includes a one-way inlet valve male connector (301), a one-way inlet valve female connector (302), a large-volume standard gas cylinder (303), and a pressure reducing valve (304). The pressure reducing valve (304) is located on the top of the large-volume standard gas cylinder (303). The one-way inlet valve female connector (302) is connected to the pressure reducing valve (304). One end of the one-way inlet valve male connector (301) is connected to the standard gas cylinder, and the other end of the one-way inlet valve male connector (301) is connected to the one-way inlet valve female connector (302). The filling pressure is controlled by adjusting the pressure reducing valve (304).

8. The portable backpack-type gas metering and verification system according to claim 1, characterized in that: The calibration cover (214) includes a cover body (214a) and a clamping member (214b). The top of the cover body (214a) is funnel-shaped and made of rubber. The cover body (214a) is provided with an air inlet (214c) and an air outlet (214d). The clamping member (214b) is sleeved on the outside of the rubber cover body (214a). When the detection tube (213a) at the bottom of the gas detector alarm (213) comes into contact with the inside of the rubber cover body (214a), the clamping member (214b) tightens, so that the inside of the rubber cover body (214a) and the detection tube (213a) are in close contact to achieve a sealing effect.

9. A portable backpack-type gas metering and verification system according to claim 8, characterized in that: The clamping element (214b) is a spring clip or a mechanical clamping arm.

10. A portable backpack-type gas metering and verification system according to claim 1, characterized in that: The partition (104) has a pipe hole (109) for the pipe to pass through.

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