CN110849946A - Calibration device and calibration method for oxygen detection alarm - Google Patents
Calibration device and calibration method for oxygen detection alarm Download PDFInfo
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- CN110849946A CN110849946A CN201911065390.XA CN201911065390A CN110849946A CN 110849946 A CN110849946 A CN 110849946A CN 201911065390 A CN201911065390 A CN 201911065390A CN 110849946 A CN110849946 A CN 110849946A
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Abstract
The invention provides a calibration device and a calibration method for an oxygen detection alarm. Calibration device of oxygen detection alarm includes: a plurality of standard gas cylinders (100) for storing standard gas of different concentrations; a plurality of gas masks (700) for housing oxygen sensors of the oxygen detection alarms; and the gas storage cavity (400) is respectively communicated with the gas outlets of the plurality of standard gas cylinders (100), is respectively communicated with the plurality of gas masks (700), and is used for receiving the standard gas output by one standard gas cylinder (100) and simultaneously outputting the standard gas to the plurality of gas masks (700) so as to supply the standard gas to the oxygen sensors of the plurality of oxygen detection alarms. The calibration device and the calibration method of the oxygen detection alarm are novel in design and high in practicability.
Description
Technical Field
The invention relates to the field of detection, in particular to a calibration device and a calibration method for an oxygen detection alarm.
Background
The calibration method and device for the oxygen detection alarm are mostly designed according to the verification requirements of the electrochemical oxygen meter (oxygen meter) in JJJG 365-2008 & lt & gt verification rules for electrochemical oxygen meters.
Specifically, the calibration device of the oxygen detection alarm generally comprises four independent gas cylinders respectively storing standard gases with different concentrations, a flowmeter, a gas conduit and an electronic stopwatch, wherein the detection items comprise indicating errors and response time. The calibration process of the indicating error comprises the following steps: respectively introducing standard gas with different concentrations into the instrument, reading after the indicated value is stable (generally, the time from the aeration to the reading is not less than 3 times of the response time of the instrument), and purging the oxygen detection alarm. At present, a manual pressing mode is adopted to align a gas conduit with an instrument for purging. The method may cause the conditions of uneven gas flow velocity and flow rate, and the like, and influence the accuracy of the indicating value error.
The response time verification process comprises the following steps: zero gas is introduced to calibrate the zero point of the instrument, then nitrogen-oxygen standard gas with the concentration of about 80% of the measuring range is introduced into the instrument, and the time from the introduction of the standard gas to the change of the indicating value of the instrument to the stable indicating value of the measured gas of 80% is measured by a stopwatch. After the zero point calibration (oxygen table indicates that the concentration is about 0.1%), it is necessary to switch the gas concentrations. In the process of manually switching gas, the oxygen detection alarm is placed in the air (the oxygen content of the air is 20.8 percent, which is equivalent to the fact that 20.8 percent concentration gas is introduced), the numerical value of the oxygen detection alarm rapidly rises, and the risk of causing the measurement deviation of response time exists in the process of switching the gas concentration; meanwhile, in the operation process, due to the fact that standard gas needs to be switched on and off, multiple persons need to cooperate to operate, if the standard gas cannot be switched on and off in time, the standard gas is leaked laterally, the utilization rate is low, and the like; the calibration device can only be operated singly, and has low working efficiency and the like.
Disclosure of Invention
Aiming at the technical problems, the invention provides a calibration device and a calibration method of an oxygen detection alarm.
The invention provides the following technical scheme:
the invention provides a calibration device of an oxygen detection alarm, which comprises:
the standard gas cylinders are used for storing standard gas with different concentrations;
a plurality of gas masks for covering oxygen sensors of the oxygen detection alarm;
and the gas storage cavity is respectively communicated with the gas outlets of the plurality of standard gas cylinders, is respectively communicated with the plurality of gas masks, and is used for receiving the standard gas output by one standard gas cylinder and simultaneously outputting the standard gas to the plurality of gas masks so as to supply the standard gas to the oxygen sensors of the plurality of oxygen detection alarms.
In the calibration device of the oxygen detection alarm, the gas mask is made of rubber materials, and a plurality of leakage holes for gas outlet are formed in the surface of the gas mask.
In the calibration device for the oxygen detection alarm, the calibration device further comprises first gas pipelines which correspond to the standard gas cylinders one by one, and the gas outlets of the standard gas cylinders are communicated with the gas storage cavity through the first gas pipelines.
In the calibration device of the oxygen detection alarm, a gas switch valve is arranged at the gas outlet of the standard gas cylinder.
In the calibration device of the oxygen detection alarm, the calibration device further comprises a gas flow controller which is installed on the gas storage cavity and used for controlling the gas storage cavity to output the flow or flow speed of the standard gas to the gas mask.
In the calibration device for the oxygen detection alarm, the calibration device further comprises second gas pipelines which correspond to the gas masks one by one, and the gas masks are communicated with the gas storage cavity through the second gas pipelines.
The invention provides a calibration method of the calibration device, which comprises the following steps:
step S1, fixedly covering the gas mask on a sensor of the detected oxygen detection alarm;
step S2, opening a gas switch valve on a standard gas cylinder to output the standard gas in the standard gas cylinder to a gas storage cavity;
and step S3, when the standard gas is filled in the gas storage cavity, adjusting the gas flow controller to adjust the flow rate of the standard gas which is simultaneously output to the plurality of gas masks by the gas storage cavity to 300mL/min, and enabling the standard gas in the gas storage cavity to respectively purge the oxygen sensors of the plurality of oxygen detection alarms through the plurality of gas masks.
According to the calibration device and the calibration method for the oxygen detection alarm, a plurality of oxygen detection alarms can be simultaneously measured through single operation of the gas storage cavity and the plurality of gas masks, and the working efficiency is improved. When the standard gas detection with various concentrations is carried out, the gas loss caused by manual intervention of the switching standard gas is reduced, and the switching of the standard gas with various concentrations in the same device is realized. Not only improves the working efficiency, but also increases the accuracy of response time measurement. The calibration device and the calibration method of the oxygen detection alarm are novel in design and high in practicability.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 shows a schematic structural view of a calibration device of an oxygen detection alarm according to a preferred embodiment of the present invention.
Detailed Description
The technical problem to be solved by the invention is as follows: the calibration of the oxygen detection alarm comprises the step of purging the sensors one by respectively using standard gases with different concentrations through a manual transfer method. In this step, there is a risk of causing a deviation in the response time measurement; the standard gas leaks laterally, and the utilization rate is low; meanwhile, the operation can be performed only once, and the working efficiency is low. The invention proposes the idea about the technical problem that: a calibration device and a calibration method for an oxygen detection alarm are constructed, a single outlet of standard gas is converted into a plurality of outlets by adopting a gas storage cavity 400 and a plurality of gas masks 700, basic conditions are provided for calibrating a plurality of oxygen detection alarms simultaneously, gas loss caused by manual intervention during detection of various standard gases with different concentrations is reduced, and switching of the standard gases with various concentrations in the same device is realized.
In order to make the technical solutions, technical objects, and technical effects of the present invention clearer so as to enable those skilled in the art to understand and implement the present invention, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 shows a schematic diagram of the calibration arrangement of the oxygen detection alarm according to the preferred embodiment of the present invention. Specifically, the calibration device of the oxygen detection alarm comprises:
a plurality of standard gas cylinders 100 for storing standard gas of different concentrations;
a plurality of gas masks 700 for housing oxygen sensors of an oxygen detection alarm (not shown);
and the gas storage cavity 400 is respectively communicated with the gas outlets of the plurality of standard gas cylinders 100 and respectively communicated with the plurality of gas masks 700, and is used for receiving the standard gas output by one standard gas cylinder 100 and simultaneously outputting the standard gas to the plurality of gas masks 700 so as to supply the standard gas to the oxygen sensors of the plurality of oxygen detection alarms.
In the above arrangement, by using a gas storage chamber 400 and a plurality of gas masks 700, a single outlet for standard gas is converted to a plurality of outlets, providing a base condition for calibrating a plurality of oxygen detection alarms simultaneously.
Further, the gas mask 700 is made of a rubber material, and a plurality of leakage holes 800 for gas outlet are formed on the surface.
Because the detected oxygen detection alarm has an irregular shape, the gas mask 700 can completely cover the detected oxygen detection alarm by adopting a rubber material, and the effective purging of the standard gas flow is ensured. By adopting a plurality of leak holes 800, the gas flow is effectively flowed, and the regulation requirement is met.
Further, in this embodiment, the calibration apparatus further includes first gas pipelines 300 corresponding to the standard gas cylinders 100 one by one, and the gas outlets of the standard gas cylinders 100 are communicated with the gas storage cavities 400 through the first gas pipelines 300.
A gas switching valve 200 is installed at the gas outlet of the standard gas cylinder 100. The purpose of supplying gas to the gas storage cavity 400 from the standard gas cylinder 100 is realized by controlling and adjusting the gas switch valve 200.
Further, the calibration apparatus further includes a gas flow controller 500 mounted on the gas storage chamber 400 for controlling the flow rate of the standard gas output from the gas storage chamber 400 to the gas mask 700.
The calibrated gas output for the oxygen detection alarm may be adjusted by gas flow controller 500.
Further, the calibration apparatus further includes a second gas pipe 600 corresponding to the gas mask 700 one to one, and the gas mask 700 is communicated with the gas storage chamber 400 through the second gas pipe 600.
Further, the number of gas masks 700 and the number of standard gas cylinders 100 may be the same or different.
Further, the invention also provides a calibration method based on the calibration device, which comprises the following steps:
step S1, fixedly covering the gas mask 700 on the sensor of the detected oxygen detection alarm;
step S2, opening a gas switch valve 200 on a standard gas cylinder 100, so that the standard gas in the standard gas cylinder 100 is output to the gas storage cavity 400;
step S3, when the gas storage cavity 400 is filled with the standard gas, the gas flow controller 500 is adjusted to adjust the flow rate of the standard gas output from the gas storage cavity 400 to the plurality of gas masks 700 at the same time to 300mL/min, and the standard gas in the gas storage cavity 400 is purged through the plurality of gas masks 700 to the oxygen sensors of the plurality of oxygen detection alarms, respectively.
By the calibration method, preparation is made for calibrating the plurality of oxygen detection alarms at the same time, and the gas switch valve 200 is closed after the indication value error is detected.
According to the calibration device and the calibration method for the oxygen detection alarm, a plurality of oxygen detection alarms can be simultaneously measured through single operation of the gas storage cavity and the plurality of gas masks, and the working efficiency is improved. When the standard gas detection with various concentrations is carried out, the gas loss caused by manual intervention of the switching standard gas is reduced, and the switching of the standard gas with various concentrations in the same device is realized. Not only improves the working efficiency, but also increases the accuracy of response time measurement. The calibration device and the calibration method of the oxygen detection alarm are novel in design and high in practicability.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A calibration device for an oxygen detection alarm, comprising:
a plurality of standard gas cylinders (100) for storing standard gas of different concentrations;
a plurality of gas masks (700) for housing oxygen sensors of the oxygen detection alarms;
and the gas storage cavity (400) is respectively communicated with the gas outlets of the plurality of standard gas cylinders (100), is respectively communicated with the plurality of gas masks (700), and is used for receiving the standard gas output by one standard gas cylinder (100) and simultaneously outputting the standard gas to the plurality of gas masks (700) so as to supply the standard gas to the oxygen sensors of the plurality of oxygen detection alarms.
2. The calibration device of the oxygen detection alarm according to claim 1, wherein the gas mask (700) is made of rubber material and has a plurality of holes (800) for gas outlet.
3. The calibration device of the oxygen detection alarm according to claim 1, wherein the calibration device further comprises first gas pipelines (300) corresponding to the standard gas cylinders (100) one by one, and the gas outlets of the standard gas cylinders (100) are communicated with the gas storage cavity (400) through the first gas pipelines (300).
4. The calibration device of the oxygen detection alarm according to claim 1, wherein a gas switch valve (200) is installed at the gas outlet of the standard gas cylinder (100).
5. The calibration device for an oxygen detection alarm according to claim 4, wherein the calibration device further comprises a gas flow controller (500) mounted on the gas storage chamber (400) for controlling the flow rate of the standard gas from the gas storage chamber (400) to the gas mask (700).
6. The calibration device of the oxygen detection alarm according to claim 1, wherein the calibration device further comprises a second gas conduit (600) in one-to-one correspondence with the gas mask (700), the gas mask (700) being in communication with the gas storage chamber (400) through the second gas conduit (600).
7. A method of calibrating a calibration device according to claim 5, comprising the steps of:
step S1, fixedly covering the gas mask (700) on a sensor of the detected oxygen detection alarm;
step S2, opening a gas switch valve (200) on a standard gas cylinder (100) to enable the standard gas in the standard gas cylinder (100) to be output to a gas storage cavity (400);
step S3, when the gas storage cavity (400) is full of the standard gas, the gas flow controller (500) is adjusted to adjust the flow rate of the standard gas which is output to the plurality of gas masks (700) from the gas storage cavity (400) at the same time to 300mL/min, and the standard gas in the gas storage cavity (400) is enabled to respectively purge the oxygen sensors of the plurality of oxygen detection alarms through the plurality of gas masks (700).
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| CN201911065390.XA CN110849946A (en) | 2019-11-04 | 2019-11-04 | Calibration device and calibration method for oxygen detection alarm |
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| CN201911065390.XA CN110849946A (en) | 2019-11-04 | 2019-11-04 | Calibration device and calibration method for oxygen detection alarm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114384144A (en) * | 2021-10-25 | 2022-04-22 | 广东电网有限责任公司广州供电局 | Calibration device and method of alarm instrument for detecting sulfur hexafluoride in power distribution room |
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