Gas calibration device and gas calibration method

Abstract

The invention discloses a gas calibration device and a gas calibration method, and relates to the technical field of gas detector calibration, the gas calibration device comprises a shell structure, a push rod and a gas storage structure, a detector to be calibrated is arranged on the push rod, the push rod extends into the shell structure and is in sealed sliding connection with the shell structure, and the gas storage structure is arranged on the push rod. The shell structure and the push rod form a calibration cavity, the gas storage structure is used for storing calibration gas, and the gas storage structure can be communicated with the calibration cavity. According to the gas calibration device and the gas calibration method, the structure is simple, and operation is easy.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detector calibration, and in particular to a gas calibration device and a gas calibration method. Background Art

[0002] Gas detectors play a vital role in many fields such as industrial production, environmental monitoring, and public safety. Accurate gas detection can avoid industrial explosions, timely warn of harmful gas leaks in the environment, and ensure the safety of crowded places.

[0003] However, the accuracy of gas detectors depends on regular and accurate calibration. The existing calibration devices have complex structures and operation processes, and require professionals to operate for a long time, resulting in low calibration efficiency and high costs. Summary of the invention

[0004] The purpose of the present invention is to provide a gas calibration device and a gas calibration method to solve the problems existing in the above-mentioned prior art, with simple structure and simple operation.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a gas calibration device, comprising: a shell structure, a push rod and a gas storage structure, wherein a detector to be calibrated is arranged on the push rod, the push rod extends into the shell structure and is sealed and slidably connected to the shell structure, the shell structure and the push rod form a calibration cavity, the gas storage structure is used to store calibration gas, and the gas storage structure can be connected to the calibration cavity.

[0007] Preferably, the housing structure comprises a plug and a shell, the plug is arranged at one end of the shell, and the plug is detachably connected to the shell, and the push rod can be extended from the other end of the shell.

[0008] Preferably, a first sealing ring is provided between the plug and the housing.

[0009] Preferably, it also includes a driving structure, and the driving structure is used to drive the push rod to slide relative to the housing structure.

[0010] Preferably, it also includes a temperature and humidity sensor and a pressure sensor, wherein the temperature and humidity sensor is used to detect the temperature and humidity in the calibration chamber, and the pressure sensor is used to detect the pressure in the calibration chamber.

[0011] Preferably, a first stop valve is provided between the gas storage structure and the calibration chamber.

[0012] Preferably, it also includes a gas recovery structure, which can be communicated with the calibration chamber.

[0013] Preferably, a second stop valve is provided between the gas recovery structure and the calibration chamber.

[0014] Preferably, a second sealing ring is provided between the push rod and the detector to be calibrated, and a third sealing ring is provided between the push rod and the housing structure.

[0015] The present invention also provides a gas calibration method using the gas calibration device, wherein the detector to be calibrated is installed on a push rod, and calibration gas is introduced into the calibration chamber to discharge the air in the calibration chamber. After the air in the calibration chamber is discharged, the push rod drives the detector to move, so that the calibration gas in the gas storage structure enters the calibration chamber. During this process, it is ensured that the temperature, humidity and pressure in the calibration chamber are maintained within a certain range. After the calibration is completed, the calibration gas in the calibration chamber is discharged.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The present invention forms a calibration cavity through a housing structure and a push rod, and a detector to be calibrated is arranged on the push rod. The detector to be calibrated slides relative to the housing structure along with the push rod, and a gas storage structure introduces calibration gas into the calibration cavity to achieve calibration of the detector. The present invention has a simple structure, a simple operation process, reduces costs, and improves calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Axonometric measurement of the gas calibration device of the present invention Figure 1 ;

[0020] Figure 2 Axonometric measurement of the gas calibration device of the present invention Figure 2 ;

[0021] Figure 3 A top view of the gas calibration device of the present invention;

[0022] Figure 4 for Figure 3 AA section view;

[0023] Figure 5 for Figure 3 BB cross-sectional view;

[0024] In the figure: 100-gas calibration device, 1-push rod, 2-housing, 3-detector to be calibrated, 4-first sealing ring, 5-second sealing ring, 6-third sealing ring, 7-plug, 8-gas storage structure, 9-temperature and humidity sensor, 10-first stop valve, 11-second stop valve, 12-gas recovery structure, 13-pressure sensor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a gas calibration device and a gas calibration method to solve the problems existing in the above-mentioned prior art, with simple structure and simple operation.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] like Figures 1 to 5 As shown, this embodiment provides a gas calibration device 100, including: a shell structure, a push rod 1, a gas storage structure 8 and a gas recovery structure 12. The shell structure plays a role of fixed support. The detector 3 to be calibrated is arranged on the push rod 1. The push rod 1 extends into the shell structure and is sealed and slidably connected with the shell structure. The push rod 1 slides along the shell structure to realize the suction and exhaust process. The shell structure and the push rod 1 form a calibration chamber. The gas storage structure 8 is used to store calibration gas. The gas storage structure 8 is preferably an air bag. The gas storage structure 8 can be connected to the calibration chamber. A first stop valve 10 is arranged between the gas storage structure 8 and the calibration chamber. The gas recovery structure 12 is preferably an air bag. The gas recovery structure 12 can be connected to the calibration chamber. A second stop valve 11 is arranged between the gas recovery structure 12 and the calibration chamber.

[0030] Specifically, in this embodiment, the housing structure includes a plug 7 and a housing 2, the plug 7 is arranged at one end of the housing 2, a first sealing ring 4 is arranged between the plug 7 and the housing 2, and the plug 7 and the housing 2 are detachably connected, the push rod 1 can extend from the other end of the housing 2, a second sealing ring 5 is arranged between the push rod 1 and the detector 3 to be calibrated to ensure that the push rod 1 and the detector 3 to be calibrated are tightly connected, and a third sealing ring 6 is arranged between the push rod 1 and the housing 2. The first sealing ring 4 and the third sealing ring 6 ensure that the calibration chamber is airtight.

[0031] This embodiment also includes a driving structure, which is used to drive the push rod 1 to slide relative to the housing structure. The driving structure is a cylinder, a hydraulic cylinder, an electric push rod or a ball screw structure.

[0032] This embodiment also includes a temperature and humidity sensor 9 and a pressure sensor 13. The temperature and humidity sensor 9 is used to detect the temperature and humidity in the calibration chamber in real time during the calibration process. The pressure sensor 13 is used to detect the pressure in the calibration chamber in real time during the calibration process, thereby providing basic conditions for the calibration of the detector.

[0033] In this embodiment, the push rod 1 can move forward and backward, realize air intake and exhaust during the movement, can fix the detector 3 to be calibrated, and is the key driving component of the air intake and exhaust function, driving the detector 3 to be calibrated to move, realizing the detection of the calibration gas in the calibration chamber and the calibration of the detector 3 to be calibrated; the shell 2 serves as a fixed supporting structure of the entire device, providing a stable installation foundation for other components, ensuring the stability of the device during operation; the detector 3 to be calibrated is detachably connected to the push rod 1, which is convenient for installation and disassembly after calibration; the second sealing ring 5 is used to stabilize the detector 3 to be calibrated when the push rod 1 moves axially to prevent it from falling off, and at the same time ensure the sealing between the push rod 1 and the detector 3 to be calibrated to avoid gas leakage affecting the calibration result; the first sealing ring 4 and the third sealing ring 6 are used to seal the calibration gas, seal the calibration gas in the calibration chamber, ensure the stability of the gas environment during the calibration process, and thus improve the accuracy of the calibration; the plug 7 plays a role of fixing and supporting, and plays a role of stable pneumatic sealing of the internal structure of the device; The gas storage structure 8 is a component for storing calibration gas, into which the calibrated calibration gas can be injected. By opening the first stop valve 10 and pulling the push rod 1, the calibration gas in the gas storage structure 8 is pumped into the calibration chamber, providing a standard gas source for the calibration of the detector 3 to be calibrated. During the calibration process, the temperature and humidity sensor 9 can monitor the temperature and humidity of the calibration gas, and the pressure sensor 13 can monitor the pressure and sealing condition of the calibration chamber in real time. These parameters are crucial for accurately calibrating the detector. They can provide timely feedback on the gas state and give a digital early warning reminder to adjust the accuracy of the calibration detector. The first stop valve 10 plays a role when the push rod 1 drives the detector 3 to be calibrated to move outward, and can inject the calibration gas in the gas storage structure 8 into the calibration chamber. At the same time, it has a shut-off function to accurately control the injection of the calibration gas. The second stop valve 11 can be opened after the detection of the detector 3 to be calibrated is completed, so that the gas inside the calibration chamber is uniformly pressed into the gas recovery structure 12 through the push rod 1 to achieve gas recovery.

[0034] Embodiment 2

[0035] The present embodiment provides a gas calibration method using the gas calibration device 100 of the first embodiment, the detector 3 to be calibrated is installed on the push rod 1, and the second sealing ring 5 is installed, the calibration gas is introduced into the calibration chamber to discharge the air in the calibration chamber, after the air in the calibration chamber is discharged, the first stop valve 10 is opened, the driving structure drives the push rod 1, the push rod 1 drives the detector to move, so that the calibration gas in the gas storage structure 8 enters the calibration chamber at a uniform speed, during this process, the temperature and humidity in the calibration chamber are monitored by the temperature and humidity sensor 9 and the pressure in the calibration chamber is monitored by the pressure sensor 13, the speed at which the driving structure drives the push rod 1 to slide is controlled by the monitored parameters, to ensure that the temperature, humidity and pressure in the calibration chamber are maintained within a certain range, and the pressure is preferably not more than 1MPa, after the calibration is completed, the first stop valve 10 is closed, the second stop valve 11 is opened, the push rod 1 moves in the opposite direction, and the calibration gas in the calibration chamber is discharged to the gas recovery structure 12 at a uniform speed.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A gas calibration device, characterized in that: include: A shell structure, a push rod and a gas storage structure, the detector to be calibrated is arranged on the push rod, the push rod extends into the shell structure and is sealed and slidably connected to the shell structure, the shell structure and the push rod form a calibration cavity, the gas storage structure is used to store calibration gas, and the gas storage structure can be connected to the calibration cavity.

2. The gas calibration device according to claim 1, characterized in that: The shell structure includes a plug and a shell. The plug is arranged at one end of the shell and is detachably connected to the shell. The push rod can extend from the other end of the shell.

3. The gas calibration device according to claim 2, characterized in that: A first sealing ring is arranged between the plug and the shell.

4. The gas calibration device according to claim 1, characterized in that: It also includes a driving structure, which is used to drive the push rod to slide relative to the housing structure.

5. The gas calibration device according to claim 1, characterized in that: It also includes a temperature and humidity sensor and a pressure sensor. The temperature and humidity sensor is used to detect the temperature and humidity in the calibration cavity, and the pressure sensor is used to detect the pressure in the calibration cavity.

6. The gas calibration device according to claim 1, characterized in that: A first stop valve is arranged between the gas storage structure and the calibration chamber.

7. The gas calibration device according to claim 1, characterized in that: It also includes a gas recovery structure, which can be communicated with the calibration cavity.

8. The gas calibration device according to claim 7, characterized in that: A second stop valve is provided between the gas recovery structure and the calibration chamber.

9. The gas calibration device according to claim 1, characterized in that: A second sealing ring is arranged between the push rod and the detector to be calibrated, and a third sealing ring is arranged between the push rod and the housing structure.

10. A gas calibration method using the gas calibration device according to any one of claims 1 to 9, characterized in that: Install the detector to be calibrated on the push rod, introduce calibration gas into the calibration chamber, and discharge the air in the calibration chamber. After the air in the calibration chamber is discharged, the push rod drives the detector to move, so that the calibration gas in the gas storage structure enters the calibration chamber. During this process, ensure that the temperature, humidity and pressure in the calibration chamber are maintained within a certain range. After the calibration is completed, discharge the calibration gas in the calibration chamber.

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