CN-122017185-A - Performance test device and method for open path combustible gas detector

CN122017185ACN 122017185 ACN122017185 ACN 122017185ACN-122017185-A

Abstract

The invention discloses a performance test device and method for an open path combustible gas detector, which belong to the technical field of open path combustible gas detector tests, wherein the device comprises a bottom plate, a sliding table, an air chamber fixing frame, a standard air chamber and an air chamber driving frame, the bottom plate is provided with the sliding table, A supporting plate is fixed on the sliding part of the sliding table, two air chamber fixing frames are arranged on the supporting plate in parallel, a standard air chamber is arranged on the two air chamber fixing frames, an air chamber driving frame is arranged between the two air chamber fixing frames, and the air chamber driving frame is positioned at the lower part of the standard air chamber and drives the standard air chamber to rotate. The invention realizes comprehensive and accurate test and calibration of the open path combustible gas detector.

Inventors

WANG JUN
GUO XIAOPO
HE HU
MENG MENG
WANG GAOCAI
LI ZHUANG
GAO YUAN
LU YUANSONG

Assignees

南阳防爆电气研究所有限公司

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. The performance test device for the open path combustible gas detector is characterized by comprising a bottom plate, a sliding table, air chamber fixing frames, a standard air chamber and an air chamber driving frame, wherein the sliding table is arranged on the bottom plate, a supporting plate is fixed on a sliding part of the sliding table, two air chamber fixing frames are arranged on the supporting plate in parallel, the standard air chamber is arranged on the two air chamber fixing frames, the air chamber driving frame is arranged between the two air chamber fixing frames, and the air chamber driving frame is positioned at the lower part of the standard air chamber and drives the standard air chamber to rotate.
2. The device for testing the performance of the open path combustible gas detector of claim 1, wherein the standard gas chamber comprises a cylindrical barrel, optical filters are arranged at two ends of the cylindrical barrel, the number of the standard gas chambers is four, and the combustible gas with the gas concentration of 10%, 25%, 50% and 75% is respectively stored.
3. The device for testing the performance of the open path combustible gas detector of claim 2, wherein the air chamber fixing frame comprises a base, an annular supporting frame and rollers, the annular supporting frame is arranged on the upper portion of the base, three rollers are uniformly distributed on the inner side of the annular supporting frame, and adjusting handles are arranged on the outer side of the annular supporting frame corresponding to the positions of the rollers.
4. The device for testing the performance of the open path combustible gas detector of claim 3 wherein the gas chamber driving frame comprises a door-shaped frame, a driving wheel is arranged at the top of the door-shaped frame, one end of the driving wheel is connected with the driving motor, and the surface of the driving wheel is in contact with the standard gas chamber.
5. The device for testing the performance of the open path combustible gas detector of claim 4 wherein the annular support frame comprises an upper semicircular ring and a lower semicircular ring, wherein one ends of the two semicircular rings are hinged, and the other ends of the two semicircular rings are connected through a connecting piece.
6. The device for testing the performance of the open-path combustible gas detector of claim 5 wherein the base plate is provided with a transverse linear module and a longitudinal linear module, and wherein the moving blocks of the transverse linear module and the moving blocks of the longitudinal linear module are respectively provided with a blocking cover or a shutter.
7. The device for testing the performance of the open path combustible gas detector of claim 6, further comprising a direct solar radiation testing component, wherein the direct solar radiation testing component comprises a stainless steel cylinder, a reflecting plane mirror, a bulb fixing clamp and a fixing steel frame, optical glass is arranged at two ends of the stainless steel cylinder, one end, close to a receiving end of a tested product, of the stainless steel cylinder is connected with a light shield, an iris tool is obliquely arranged at the upper right side of the stainless steel cylinder, the iris tool comprises an inclined branch pipe connected to the top surface of the stainless steel cylinder, and a convex lens is arranged at the upper end of the inclined branch pipe, the reflecting plane mirror is connected with one end of the fixing steel frame through the bulb fixing clamp, and the reflecting plane mirror is positioned above the iris tool.
8. An open path combustible gas detector performance test method implemented based on an open path combustible gas detector performance test apparatus as claimed in any one of claims 1 to 5, comprising: calibration test of open path flammable gas detector: Four standard air chambers with gas concentration of 10%, 25%, 50% and 75% are configured by using a displacement method by using a flow air distribution system, the four standard air chambers are translated into light paths of a transmitting end and a receiving end of an open path detector while rotating rapidly according to the concentration from low to high, each standard air chamber is tested for 3 times, and the difference value between each measured value and the concentration value of the standard air chamber is not more than +/-10% of the measuring range or not more than 20% of the concentration value of the standard air chamber, and the larger value is obtained; Stability test of open path flammable gas detector: The open path flammable gas detector is operated in ambient air for 8 weeks, during which time, the gas chamber is filled with 50% concentration of test gas every week and at the end of the test, the gas chamber is placed in the light path for 3min, the reading is recorded, the difference between the measured value and the nominal value is not more than +/-10% of the measuring range, or not more than +/-20% of the measured value, and the larger value is taken; alarm reliability test of open path flammable gas detector: turning on a power supply of a tested product, zeroing after normal operation, and presetting 41.5% LEL.m as an alarm point; after the tested product works for 30s, a standard air chamber with 50 percent LEL is arranged on an air chamber fixing frame, so that the air chamber is translated into an optical path while rotating rapidly, the optical path is maintained for 30s, whether the tested product alarms or not is recorded, and then the optical path is rotated out; Keeping the normal work of the tested product for 30 seconds, enabling a standard air chamber with 50% LEL to translate into the light path while rotating rapidly, keeping for 30 seconds, recording whether the tested product alarms or not, and then unscrewing the light path; Keeping the normal work of the tested product for 30 seconds, enabling a standard air chamber with 50% LEL to translate into the light path while rotating rapidly, keeping for 30 seconds, recording whether the tested product alarms or not, and then unscrewing the light path; water vapor interference test of open path flammable gas detector: Turning on a power supply of a tested product, zeroing after normal operation, and performing normal operation for 30min, wherein 24% LEL.m is preset as an alarm point; Firstly, putting a water vapor air chamber filled with dry clean air into a light path to keep the working stability, then installing a standard air chamber with 15 percent LEL on an air chamber fixing frame, enabling the standard air chamber to translate into the light path while rotating rapidly, recording whether a tested product alarms or not, recording a stable display value, and then screwing out the light path; a standard air chamber with 25 percent LEL is replaced and installed on an air chamber fixing frame, so that the standard air chamber is translated into an optical path while rotating rapidly, whether a tested product alarms or not is recorded, a stable display value is recorded at the same time, and then the optical path is unscrewed; Then the steam air chamber with the local pressure of 50kPa is put into a light path to keep the operation stable, a standard air chamber with 15 percent LEL is arranged on an air chamber tool, so that the air chamber can be translated into the light path while rotating quickly, whether a tested product alarms or not is recorded, meanwhile, the display value after the stabilization is recorded, and then the light path is rotated out; the standard air chamber with 25 percent LEL is replaced on the air chamber tool, so that the air chamber is translated into an optical path while rotating rapidly, whether a tested product alarms or not is recorded, a stable display value is recorded, and then the optical path is rotated out; After the test is finished, arranging experimental data, calculating a difference value between a measured value and a nominal value, wherein the difference value between the measured value and the nominal value is not more than +/-10% of a measuring range or not more than +/-20% of the measured value, and taking the larger of the measured value and the nominal value; vibration test of open path flammable gas detector: turning on a power supply of the tested product, zeroing after the tested product works normally for 30min, and presetting 20% LEL.m as an alarm point; a standard air chamber with 50 percent LEL is arranged on an air chamber fixing frame, so that the standard air chamber can be translated into an optical path while rotating rapidly, whether a tested product alarms or not is recorded, a stable display value is recorded, and then the optical path is rotated out; Fixing the test object on a vibration table, switching on a power supply, adjusting the vibration tester, and vibrating for 1h in three directions of X, Y, Z in a vibration frequency of 10Hz to 30Hz and an amplitude of 1.0mm or in a vibration frequency of 30Hz to 150Hz, wherein the acceleration peak value is 19.6m/s 2 ; After vibration is finished, a power supply of a tested product is installed and turned on, so that the tested product is zeroed after normal operation, 20% LEL.m is preset as an alarm point, a standard air chamber of 50% LEL is installed on an air chamber fixing frame, the air chamber is translated into an optical path while rotating rapidly, whether the tested product alarms or not is recorded, a stable display value is recorded, and then the optical path is rotated out; After the test is completed, the experimental data are collated, and the difference between the measured value and the nominal value is calculated, wherein the difference between the measured value and the nominal value is not more than +/-10% of the measuring range or not more than +/-20% of the measured value, and the difference is larger than the difference; Drop performance test of open path flammable gas detector: The portable equipment is required to fall from the height of 1m to the concrete ground in the working state, the movable equipment with the mass less than 5kg is required to fall from the height of 0.3 m to the concrete ground in the non-working state, other movable equipment is required to fall from the height of 0.1m to the concrete ground, and the portable equipment is required to fall from the normal moving direction of the portable equipment from the different sides downwards for three times according to the requirement; turning on a power supply of the tested product, zeroing after the tested product works normally for 30min, and presetting 50% LEL.m as an alarm point; A standard air chamber with 50 percent LEL is arranged on an air chamber tool, so that the air chamber can be translated into an optical path while rotating rapidly, whether a tested product alarms or not is recorded, a stable display value is recorded, and then the optical path is rotated out; Response time test of open path flammable gas detector: turning on a power supply of the tested product to enable the power supply to be zeroed after normal operation; a standard air chamber with the LEL of 50 percent is arranged on an air chamber fixing frame, so that the standard air chamber is quickly rotated and simultaneously translated into an optical path, then timing is started, the time when the display value is 45 percent LEL is recorded, the time should not exceed 10 seconds, and then the standard air chamber is unscrewed from the optical path; The standard air chamber of 50% LEL is translated into the light path and starts timing while rotating fast, the time of recording the tested product to start alarming is not more than 10s, and then the light path is rotated out; Shortest operating time test of open path flammable gas detector: turning on a power supply of the tested product to enable the power supply to be zeroed after normal operation; A standard air chamber with 50% LEL is arranged on an air chamber fixing frame, so that the air chamber starts to time after the air chamber rotates rapidly and translates into an optical path, the air chamber is quickly rotated out of the optical path when the display value is recorded to be 45% LEL, and the time when the display value is recorded to be 5% LEL is not more than 30s; voltage fluctuation test of open path flammable gas detector: Switching on the power supply of the tested product to rated voltage, and zeroing after normal operation; Installing a standard air chamber with 50% LEL on an air chamber tool, enabling the standard air chamber to translate into an optical path while rotating rapidly, recording a stable display value, and screwing the air chamber out of the optical path, wherein the display value is not more than +/-5% of a measuring range or not more than +/-10% of the measured value, and the larger of the display value and the measured value is not more than the greater of the +/-10% of the measured value; Adjusting the power supply of the tested product to 115% of rated voltage, observing whether the equipment can normally run, installing a standard air chamber with 50% LEL on an air chamber tool, enabling the standard air chamber to translate into an optical path while rotating rapidly, recording a stable display value, and screwing the air chamber out of the optical path, wherein the display value is not more than +/-5% of a measuring range or not more than +/-10% of a measured value, and the larger of the display value and the measured value is the larger of the display value and the measured value; Power interruption and transient test of open path flammable gas detector: turning on a power supply of the tested product to rated voltage, zeroing after normal operation, and presetting 20% LEL.m concentration as an alarm point; using a direct-current voltage drop generator to interrupt the power supply of a tested product for 10ms, repeating for ten times at 10s intervals, and recording whether shielding, fault or alarm signals occur to the equipment; After the equipment is interrupted for 10 times, a standard air chamber with 50 percent LEL is arranged on an air chamber fixing frame, so that the air chamber is translated into an optical path while rotating quickly, a stable display value is recorded, the air chamber is screwed out of the optical path, and the display value is not more than +/-2 percent of the standard value; adjusting the power supply of the tested product to 110% of rated voltage, after the equipment is stable, reducing the power supply of the tested product to 85% of the rated voltage within 10ms by using a direct-current voltage drop generator, and recording whether shielding, fault or alarm signals occur on the equipment; after the transient test is interrupted, the test sample is adjusted to rated voltage, after the test sample is stabilized, a standard air chamber of 50% LEL is translated into an optical path while rotating rapidly, a stabilized display value is recorded, the air chamber is rotated out of the optical path, and the display value is not more than +/-2% of the standard value.
9. An open path combustible gas detector performance test method implemented based on the open path combustible gas detector performance test apparatus of claim 6, comprising: beam blocking failure test of open path flammable gas detector: turning on a power supply of the tested product to rated voltage, and zeroing after normal operation, wherein the concentration of 10% LEL.m of the equipment sample measuring range is an alarm point; An opaque shutter tool is arranged in a light path 50mm away from an emitter, so that shutters cut into the light path from left to right, from right to left, from top to bottom and from bottom to top at uniform speeds of (10+/-5) cm/s respectively until light beams are completely blocked, and then the opaque shutters are completely withdrawn at the same speed; Then adjusting the equipment to a normal working state, installing a standard air chamber with 50% LEL on an air chamber tool, enabling the standard air chamber to rapidly rotate and simultaneously translate into an optical path, and recording a stable display value; Then the shutter tool is used to cut the shutter into the light path from left to right until the light beam is completely blocked after the shutter tool is used to translate and unscrew the standard air chamber, at the moment, the standard air chamber provided with 50 percent LEL is quickly screwed into the light path, then the shutter is quickly removed and begins to count, and the time when the shutter reaches the display value of +/-10 percent is recorded and is not more than 30 seconds; partial shadowing test of open path flammable gas detector: turning on a power supply of the tested product to rated voltage, and zeroing after normal operation, wherein the concentration of 10% LEL.m of the equipment sample measuring range is an alarm point; Installing a blocking cover in the light path 50mm away from the receiver, enabling the blocking cover to cut into the light path from top to bottom, from left to right, from right to left and from bottom to top at uniform speeds of 10+/-5 cm/s until the light beam is blocked by 50%, and then completely withdrawing the blocking cover at the same speed; Remote run test of open path flammable gas detector: installing the tested object on the maximum working distance, and opening the power supply of the tested object to rated voltage to enable the tested object to be zeroed after normal work; A blocking cover is arranged in the light path 50mm away from the receiver, so that the blocking cover cuts into the light path from top to bottom at a uniform speed of (10+/-5) cm/s until the light beam is blocked by 90%, and whether shielding, fault signals or false alarms are generated by the recording equipment or not is recorded; A standard air chamber with 50% LEL is arranged on an air chamber fixing frame, and is enabled to translate into an optical path while rotating rapidly, a stable display value is recorded, the difference value between the display value and a nominal value is within +/-10% of a measuring range, or within +/-20% of a measuring value, and the larger one of the display value and the nominal value is taken.
10. An open path combustible gas detector performance test method implemented based on the open path combustible gas detector performance test apparatus of claim 7, comprising: direct solar test of open path flammable gas detector: selecting an outdoor field with sufficient solar rays, and when the light intensity of an iris tool inlet is detected to be (800+/-50) W/m < 2 >, using a broadband spectral radiometer, switching on a power supply of a tested product to rated voltage so as to enable the tested product to be zeroed after normal work; The reflection inclination of solar radiation and the optical axis of a tested object are sequentially fixed at angles of +10 degrees, +3 degrees, -3 degrees and-10 degrees by adjusting the reflection plane mirror, the reflection plane mirror is in a gas chamber with the concentration of 50% of the measurement range until the reading is stable, the stable display value under each inclination angle is recorded, and whether shielding, fault or alarm signals are generated is recorded; After the test is completed, the experimental data are collated, and the difference between the display value and the nominal value should be not more than + -10% of the measurement range, or not more than + -20% of the measured value, the larger of the two.

Description

Performance test device and method for open path combustible gas detector Technical Field The invention relates to the technical field of open path combustible gas detector tests, in particular to a device and a method for testing performance of an open path combustible gas detector. Background The combustible gas detectors mainly used in the explosive gas environment at present are divided into alarm type detectors, air suction type detectors, automatic air suction type detectors, continuous operation type detectors, diffusion type detectors, fixed type detectors, portable type detectors, mobile type detectors, gas detection transmitters and the like, and all the type of detectors adopt a working mode of point position detection, namely equipment is required to be installed on the point position when the point position is required to be detected. The existing petroleum and petrochemical fields all belong to large factories and need a plurality of monitored points, so that a large number of combustible gas detectors are required to be installed. The open path detector can realize the breakthrough of the gas detection technology from point to line through the point-to-point measurement of the combustible gas on the optical path. However, the accuracy, stability and rapidity of the technology still lack a standardized and scientific test calibration method. Accordingly, there is a need for an open path combustible gas detector performance test apparatus and method. Disclosure of Invention In view of the above, the invention provides an open path combustible gas detector performance test device and method for overcoming the defects of the prior art. In order to solve the technical problems, the technical scheme is that the performance test device of the open path combustible gas detector comprises a bottom plate, a sliding table, air chamber fixing frames, a standard air chamber and an air chamber driving frame, wherein the sliding table is arranged on the bottom plate, a supporting plate is fixed on a sliding part of the sliding table, two air chamber fixing frames are arranged on the supporting plate in parallel, the standard air chamber is arranged on the two air chamber fixing frames, the air chamber driving frame is arranged between the two air chamber fixing frames, and the air chamber driving frame is positioned at the lower part of the standard air chamber and drives the standard air chamber to rotate. Further, the standard gas chamber comprises a cylinder, optical filters are arranged at two ends of the cylinder, the number of the standard gas chambers is four, and combustible gases with gas concentrations of 10%, 25%, 50% and 75% are respectively stored. Further, the air chamber fixing frame comprises a base, an annular supporting frame and rollers, wherein the annular supporting frame is arranged on the upper portion of the base, three rollers are evenly distributed on the inner side of the annular supporting frame, and an adjusting handle is arranged on the outer side of the annular supporting frame corresponding to the positions of the rollers. Further, the air chamber driving frame comprises a door-shaped frame, a driving wheel is arranged at the top of the door-shaped frame, one end of the driving wheel is connected with a driving motor, and the surface of the driving wheel is contacted with the standard air chamber. Further, the annular support frame comprises an upper semicircular ring and a lower semicircular ring, one ends of the two semicircular rings are hinged, and the other ends of the two semicircular rings are connected through a connecting piece. Further, a transverse linear module and a longitudinal linear module are arranged on the bottom plate, and a blocking cover or a shutter is arranged on each of the moving block of the transverse linear module and the moving block of the longitudinal linear module. Further, still include the direct solar radiation test part, direct solar radiation test part includes stainless steel drum, the reflector plate, bulb fixation clamp and fixed steelframe, the both ends of stainless steel drum all set up optical glass, the lens hood is connected to the one end that stainless steel drum is close to the test article receiving end, the right side upper portion slope of stainless steel drum sets up iris frock, iris frock is including connecting the slope branch pipe at stainless steel drum top surface, and set up the convex lens in slope branch pipe upper end, the reflector plate passes through bulb fixation clamp and is connected with fixed steelframe one end, and the reflector plate is located iris frock top. Another object of the present invention is to provide an open path combustible gas detector performance test method, implemented based on the open path combustible gas detector performance test apparatus described above, comprising: calibration test of open path flammable gas detector: Four standard air chambers with gas concentration of 10%, 25%,