CN110595614A - Spark detector performance testing device for dust explosion prevention and testing method thereof - Google Patents
Spark detector performance testing device for dust explosion prevention and testing method thereof Download PDFInfo
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- CN110595614A CN110595614A CN201910807152.5A CN201910807152A CN110595614A CN 110595614 A CN110595614 A CN 110595614A CN 201910807152 A CN201910807152 A CN 201910807152A CN 110595614 A CN110595614 A CN 110595614A
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- 238000012360 testing method Methods 0.000 title claims abstract description 91
- 239000000428 dust Substances 0.000 title claims abstract description 33
- 238000004880 explosion Methods 0.000 title claims description 28
- 230000002265 prevention Effects 0.000 title claims description 14
- 238000010998 test method Methods 0.000 claims abstract 3
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001788 irregular Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 2
- 238000011056 performance test Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0295—Constructional arrangements for removing other types of optical noise or for performing calibration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/08—Arrangements of light sources specially adapted for photometry standard sources, also using luminescent or radioactive material
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Abstract
The invention relates to a performance testing device and a performance testing method for a dust explosion-proof spark detector, which comprises a spark detector testing position, a black body furnace, a spark baffle, a rotary table motor, a speed-measuring coded disc, a control box, an adjustable voltage-stabilizing power supply and a dual-channel oscilloscope. The invention provides a good discrimination mode for the performance of the spark detector with uneven quality, has simple test method and convenient use, and provides substantial help for improving the safety of industry and trade industry and avoiding hidden dangers.
Description
Technical Field
The invention belongs to the field of performance testing devices of dust explosion-proof equipment, and particularly relates to a performance testing device and a performance testing method of a spark detector for dust explosion prevention.
Background
In recent years, due to the development of industry and trade, the operation processes of powder-related enterprises are more and more, especially in the industries of woodworking and textile, the generated dust has small particle size and is easy to disperse, and the situation that tiny sparks generated at the process source enter a dust removal system to cause explosion is frequent. Spark detection and extinguishing systems have been developed to prevent such hazards.
At present, different spark detection and extinguishing systems exist in the market at home and abroad, and the performances of the spark detection and extinguishing systems, such as the minimum diameter, the minimum detection temperature, the maximum detection distance, the maximum detection angle and the like of the spark cannot be simply considered.
Disclosure of Invention
The invention aims to provide a spark detector performance testing device for dust explosion prevention and a testing method thereof.
In order to solve the above technical problems, a first objective of the present invention is to provide a performance testing apparatus for a dust explosion-proof spark detector, which includes a spark detector testing position vertically arranged for installing a verified spark detector, a blackbody furnace having a furnace mouth and a furnace body, wherein the furnace mouth faces the spark detector testing position and is used for simulating spark radiation energy of a dust explosion environment, a spark baffle plate having a first hole on a surface and installed at the furnace mouth of the blackbody furnace and used for simulating spark size and shape of the dust explosion environment, a turntable arranged outside the spark baffle plate and parallel to the spark baffle plate and used for simulating spark moving speed of the dust explosion environment, a turntable motor having one end for installing the turntable and driving the turntable to rotate, a speed-measuring code disc installed at the other end of the turntable motor, and a control box electrically connected with the blackbody furnace and used for setting and controlling temperature of the blackbody furnace, The device comprises an adjustable voltage-stabilized source which is electrically connected with a turntable motor and used for controlling the speed of the turntable, and a dual-channel oscilloscope which is electrically connected with a spark detector and a speed measurement code disc respectively, wherein a spark baffle plate is arranged between the blackbody furnace and the turntable, a second hole with the aperture larger than that of the first hole is formed in the turntable, when the first hole is overlapped with the second hole, an analog spark signal which has a certain temperature, a specific shape and size and a certain moving speed and is used for detecting the spark detector is formed, the speed measurement code disc is used for calculating the angular speed of the rotation of the turntable so as to simulate different wind speeds in a dust explosion environment, and the dual-channel oscilloscope can be used for measuring the signal of the spark detector and the rotating speed of the turntable respectively.
In particular, the number of first holes may be one or more, so as to be able to simulate single or clustered sparks.
In particular, the first apertures may be of different sizes and shapes including, but not limited to, one or more of circular, square, star-shaped, triangular, and irregular shapes.
Specifically, the distance between the rotary disc and the furnace mouth of the blackbody furnace is not less than 5 cm.
Specifically, testing arrangement still including set up black body furnace fire door the place ahead and with the parallel sliding guide of the axis of the furnace body of black body furnace, with sliding guide sliding connection's fine motion platform, with the angle sensor that fine motion platform is connected, spark detector test position is fixed to be set up on the fine motion platform, fine motion platform can carry out angle four-dimensional degree adjustment in X axle, Y axle, Z axle and XY plane, thereby change spark detector test position with the distance and the angle of black body furnace fire door.
Preferably, a laser pen capable of emitting red laser is further arranged on the micro-motion platform.
Specifically, the spark detector test site includes first L template group, movably installs second L template group on first L template group, first L template group includes the first bottom plate, fixes first bottom plate surface edge and rather than the first riser of looks vertically, has seted up the third hole on the first riser, second L template group includes the second bottom plate, fixes the second riser in the second bottom plate side, has seted up the fourth hole on the second riser, first L template group with the relative position of second L template group can be adjusted to can change the size of the overlap portion in third hole and fourth hole, with the spark detector of adaptation equidimension not.
Specifically, the test device is electrically connected in the following manner: the anode of the adjustable stabilized voltage power supply is connected with the anode of the spark detector, and the cathode of the adjustable stabilized voltage power supply is connected with the cathode of the spark detector; the signal output end of the spark detector is connected with one channel of the dual-channel oscilloscope, and the other channel of the dual-channel oscilloscope is respectively connected with a group of anodes and cathodes of the speed measuring coded disc; the other group of positive electrode and negative electrode of the speed measuring coded disc are correspondingly connected with the positive electrode and the negative electrode of the adjustable voltage-stabilized power supply; the positive pole of the turntable motor is connected with the positive pole of the adjustable voltage-stabilized power supply, and the negative pole of the turntable motor is connected with the negative pole of the adjustable voltage-stabilized power supply.
The second purpose of the present invention is to provide a testing method of the spark detector performance testing apparatus for dust explosion prevention as described above, which first confirms whether the spark detector to be tested is sensitive to sunlight, if so, the testing needs to be performed under a dark room condition, then the testing is performed according to the following steps, if the spark detector to be tested is not sensitive to sunlight, the testing is directly performed according to the following steps:
(1) firstly, fixing the spark detector with the performance to be measured at a spark detector testing position, and adjusting the centers of the spark detector testing position, the furnace mouth of the black body furnace and the second hole of the turntable to be aligned; then electrically connecting the spark detector, the blackbody furnace, the control box, the turntable motor, the dual-channel oscillograph and the adjustable voltage-stabilized power supply;
(2) setting the blackbody furnace to be at the designated temperature, selecting the spark baffle with the smallest diameter of the opening to be installed at the furnace mouth of the blackbody furnace, adjusting the voltage of the stabilized voltage power supply to select the lowest simulation wind speed, and installing the spark detector test position at the farthest distance.
Specifically, in the step, the size of a first hole of the spark baffle is changed from small to large; changing the temperature of the black body furnace from low to high; changing the distance between the testing position of the spark detector and the furnace mouth from far to near; changing the detection angle between the test position of the spark detector and the furnace mouth from large to small; and adjusting the rotating speed of the turntable, namely adjusting the voltage of the adjustable voltage-stabilized power supply from low to high.
Preferably, the first holes of the same size range in shape from circular, square, star, triangular to irregular.
In the invention, a laser pen on a micro-motion platform is adopted to emit red laser for adjusting the center alignment of the testing position of the spark detector, the furnace mouth of the blackbody furnace and the second hole of the turntable; the spark detector testing position is arranged at the farthest position, namely the spark detector testing position is arranged at the farthest position of the sliding guide rail, namely the spark detector testing position is arranged at one end part of the sliding guide rail, which is farthest away from the blackbody furnace.
The scope of the present invention is not limited to the specific combinations of the above-described features, and other embodiments in which the above-described features or their equivalents are arbitrarily combined are also intended to be encompassed. For example, the above features and the technical features (but not limited to) having similar functions disclosed in the present application are mutually replaced to form the technical solution.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention provides a good discrimination mode for the performance of the spark detector with poor quality in the market, has simple identification method and convenient use, and provides substantial help for improving the safety of the industry and trade industry and avoiding hidden dangers.
Drawings
FIG. 1 is a perspective view of the rotary table and the blackbody furnace of the present invention in one direction;
FIG. 2 is a perspective view of the rotary table and the blackbody furnace of the present invention in another direction;
FIG. 3 is an enlarged fragmentary view of FIG. 2;
FIG. 4 is a perspective view of one orientation of a test site of the spark detector of the present invention;
FIG. 5 is a perspective view of another orientation of the test site of the spark detector of the present invention;
FIG. 6 is a circuit diagram of the present invention;
wherein: 11. a first base plate; 12. a first vertical plate; 13. a third aperture; 14. a kidney-shaped hole; 21. a second vertical plate; 22. a fourth aperture; 23. a second base plate; 31. a furnace mouth; 32. a furnace body; 33. supporting the black body furnace; 51. a second hole; 52. a turntable; 53. a motor shaft; 54. a turntable support; 6. a speed measuring code disc.
Detailed Description
As shown in fig. 1-6, a performance testing device for a dust explosion-proof spark detector comprises a spark detector testing position, a blackbody furnace, a spark baffle (not shown), a turntable 52, a speed-measuring coded disc 66, a sliding guide rail (not shown), a micro-motion platform (not shown) provided with a laser pen, an angle sensor (not shown), a control box, an adjustable voltage-stabilizing power supply, a dual-channel oscilloscope and a turntable motor. The testing device is usually mounted on an optical platform and used in cooperation with the optical platform.
The spark detector test position is vertically arranged and used for installing a verified spark detector, the specific structure is shown in fig. 4-5, and a hole is formed in the center of the spark detector test position and can be penetrated by red laser (the red laser irradiates towards the direction of the blackbody furnace) emitted by a laser pen on the micro-motion platform. The spark detector testing position comprises a first L-shaped plate group and a second L-shaped plate group arranged on the first L-shaped plate group; the first L-shaped plate group comprises a first bottom plate 11 and a first vertical plate 12 (the fixing mode is that bolts and the like are adopted conventionally, the same is adopted below) which is fixed at the edge of the surface of the first bottom plate 11 and is vertical to the first bottom plate, and a third hole 13 is formed in the first vertical plate 12; the second L-shaped plate group comprises a second bottom plate 23 and a second vertical plate 21 fixed on the side surface of the second bottom plate 23, and a fourth hole 22 is formed in the second vertical plate 21; the second riser 21 is installed on the side of the first riser 12 so that the third hole 13 corresponds to the fourth hole 22 (the first riser 12 and the second riser 21 are both provided with a plurality of waist-shaped holes 14, and the installation and connection of the second riser 21 on the first riser 12 are realized by installing fasteners such as bolts and nuts in the waist-shaped holes 14). The relative positions of the first L-shaped plate group and the second L-shaped plate group are adjusted by adjusting the tightness of the fastening piece, so that the size of the overlapped part of the third hole 13 and the fourth hole 22 is changed, complete overlapping or partial overlapping is realized, and the spark detector can adapt to different sizes of spark detectors. In the present application, the first base plate 11 may be mounted on the micro platform to secure the spark detector test site to the micro platform; the spark detector is mounted to the spark detector test site (typically to the first riser 12 or the second riser 21) by conventional fasteners in correspondence with the third and fourth holes 13, 22.
The blackbody furnace is placed on one side of the spark detector testing position and comprises a furnace opening 31 and a furnace body 32 (the furnace opening 31 is arranged on the end face of the furnace body 32), and the furnace opening 31 faces the spark detector testing position. The black body furnace is used for simulating spark radiation energy of a dust explosion environment and is characterized by the temperature of the black body furnace, and the lowest detection temperature of the spark detector can be detected by adjusting the temperature of the black body furnace; the blackbody furnace is electrically connected to a control box (not shown in the figure, which is commercially available and conventional), so that the temperature of the blackbody furnace can be set and controlled by adjusting the control box. In order to stabilize the blackbody furnace, a blackbody furnace support 33 is further arranged at the bottom of the furnace body 32 of the blackbody furnace, so that the blackbody furnace is stably supported on the substrate.
The spark baffle (not shown) is installed at the furnace mouth 31 of the blackbody furnace and located between the blackbody furnace and the turntable 52, and a first hole (not shown) is formed on the spark baffle. The first holes may be of different sizes and shapes, or may be of different numbers (e.g., one or more) so as to simulate individual or clustered sparks. The shape of the first aperture includes, but is not limited to, circular, square, star, triangular, and the like. In the application, the spark baffle is used for simulating the size and the shape of the spark in the dust explosion environment, and the size and the shape of a first hole in the spark baffle are used for representing; thus, by changing spark shields of different sizes and shapes, the minimum spark diameter that can be detected under different conditions can be detected.
The turntable 52 is rotatably arranged at the outer side of the spark baffle plate and is parallel to the spark baffle plate, and the distance between the turntable 52 and the blackbody furnace mouth 31 is not less than 5 cm; the turntable 52 is provided with a second hole 51 with a diameter larger than that of the first hole, and the turntable 52 can rotate to simulate the spark moving speed of the dust explosion environment. When the first hole (not shown) overlaps the second hole 51, an analog spark signal for detecting the spark detector having a certain temperature, a certain shape and size, and a certain moving speed is formed. The turntable 52 is connected with a turntable motor, so that the turntable motor is driven to rotate; the turntable motor may be electrically connected to an adjustable regulated power supply (not shown) for controlling the speed of the turntable 52. The turntable motor is provided at its bottom with a turntable support 54 to firmly support the turntable motor and turntable 52 on the aforementioned substrate. The motor shaft 53 of the turntable motor also extends in the direction away from the turntable 52, and the other end of the motor shaft 53 (the turntable 52 is installed at one end of the motor shaft 53) is provided with a 12-grid speed measuring code disc (capable of generating speed measuring pulses, 5V) for calculating the linear speed of the rotation of the turntable and simulating different wind speeds in a dust explosion environment.
As shown in fig. 6, the dual-channel oscilloscope is electrically connected to the spark detector and the speed measuring code disc 66 respectively (i.e. channel 1 of the dual-channel oscilloscope is electrically connected to the signal output terminal of the spark detector, and channel 2 is electrically connected to a set of positive and negative electrodes of the speed measuring code disc 66) for measuring the signal of the spark detector and the rotating speed of the turntable 52 respectively. The red laser emitted by the laser pen on the micro-motion platform can be used for aligning the hole (the third hole 13 or the fourth hole 22) on the spark detector test position, the blackbody furnace mouth 31 and the second hole 51 of the turntable 52 (namely, the red laser is used for accurately aligning the hole on the spark detector test position, the blackbody furnace mouth and the turntable hole).
The micro-motion platform (not shown in the figure) is installed through a sliding guide rail (for example, the sliding guide rail is arranged on the surface of the optical platform, and the micro-motion platform is installed on the sliding guide rail, so that the micro-motion platform can be installed on the optical platform in a sliding manner), the sliding guide rail is generally parallel to the central axis of the black body furnace body 32, thus the distance and the deflection angle between the spark detector and the black body furnace can be manually adjusted, and the maximum detection distance and the maximum detection angle of the spark detector at different temperatures can be detected. The micro-motion platform is arranged on the optical platform and can perform angle four-dimensional adjustment of X, Y, Z and an XY plane, so that the distance and the angle between the testing position of the spark detector and the furnace mouth 31 of the black body furnace are adjusted; the device also comprises an angle sensor (not shown) connected to the micro-motion stage (not shown) for determining the aforementioned deflection angle. The invention selects a commercial micromotion platform with the model number of XYZR60-L, and the moving amount is as follows: x, Y axis + -6.5 mm, Z axis 10mm, R axis coarse adjustment 360 degree rotation, fine adjustment + -5 degree.
The adjustable voltage-stabilizing power supply is commercially available, and the circuit connection of the adjustable voltage-stabilizing power supply and other components is shown in figure 6 (all the components are commercially available and can be directly connected by adopting a wiring). The method specifically comprises the following steps: the anode of the adjustable voltage-stabilized power supply 24V is connected with the anode of the spark detector, and the cathode of the adjustable voltage-stabilized power supply 24V is connected with the cathode of the spark detector; the signal output end of the spark detector is connected with a channel 1 of the dual-channel oscilloscope, and a channel 2 of the dual-channel oscilloscope is respectively connected with a group of anodes and cathodes of the pulses of the speed measuring coded disc 66; the other group of positive and negative electrodes of the speed measuring coded disc 66 pulse are correspondingly connected with the positive and negative electrodes of the adjustable voltage-stabilized power supply 5V; the positive pole of the turntable motor is connected with the positive pole of the adjustable voltage-stabilized power supply of 0-50V, and the negative pole of the turntable 52 motor is connected with the negative pole of the adjustable voltage-stabilized power supply of 0-50V.
The testing method of the spark detector performance testing device for dust explosion prevention (firstly, whether the spark detector to be tested is sensitive to sunlight or not is confirmed, if the spark detector to be tested is sensitive, the testing needs to be carried out under a dark room condition, otherwise, the testing is directly carried out according to the following steps) is carried out according to the following steps:
(1) fixing a spark detector with performance to be measured at a spark detector testing position, installing the spark detector testing position on the micro-motion platform, and installing the spark detector testing position on an optical platform through a sliding guide rail; a laser pen on the micro-motion platform is used for emitting red laser to align the testing position of the spark detector, the furnace mouth 31 of the blackbody furnace and the center of the second hole 51 of the turntable 52; then, the spark detector, the blackbody furnace, the control box, the turntable motor, the dual-channel oscillograph, the adjustable stabilized voltage power supply and the like are electrically connected according to the diagram in FIG. 6;
(2) setting the blackbody furnace to a specified temperature, selecting a spark baffle (not shown in the figure) with the smallest opening diameter to be arranged at a furnace mouth 31 of the blackbody furnace, adjusting the voltage of an adjustable voltage-stabilized power supply to select the lowest simulation wind speed, and arranging a test position of a spark detector at the farthest position of a sliding guide rail (not shown in the figure);
in the step (2), the spark baffle (not shown in the figure) is changed to change the size of the first hole (not shown in the figure) from small to large; first holes (not shown) of uniform size range in shape from round, square, star, triangular to irregular. Changing the temperature of the black body furnace from low to high; changing the distance between the testing position of the spark detector and the furnace mouth 31 from far to near; changing the detection angle between the test position of the spark detector and the furnace mouth 31 from large to small; the rotating speed of the rotary disc 52 is adjusted, namely the voltage of an adjustable voltage-stabilized power supply (not shown in the figure) is adjusted from low to high; the test of this step aims at finding the limit value at which the test results are reproducible (and giving the other conditions to which the limit value pertains as required) and the optimum value of the other conditions under the limit value condition;
(3) after the test is finished, the test result shows that the tested spark detector and the detectors of the same type have the same performance, and the results are no longer applicable due to the random design of the spark detector, the increase and decrease or the change of accessories and suppliers thereof.
In the invention, the spark detector testing position is arranged at the farthest position, namely the spark detector testing position is arranged at the farthest position of the sliding guide rail, namely the spark detector testing position is arranged at one end part of the sliding guide rail, which is farthest from the blackbody furnace.
As described above, the present invention has been explained fully in accordance with the gist of the present invention, but the present invention is not limited to the above-described examples and implementation methods. A practitioner of the related art may make various changes and implementations within a scope permitted by the technical idea of the present invention.
Claims (10)
1. A spark detector performance testing device for dust explosion prevention is characterized in that: including vertical setting and be used for the installation by spark detector's of check-up spark detector test position, have fire door (31) and furnace body (32) just fire door (31) orientation spark detector test position is used for simulating dust explosion environment spark radiant energy's black body stove, surface have seted up first hole and install fire door (31) department of black body stove is used for simulating dust explosion environment spark size and shape spark baffle, sets up and is in the outside of spark baffle and rather than parallel thereby be used for simulating dust explosion environment's spark travel speed's carousel (52), one end are used for the installation carousel (52) and drive carousel (52) pivoted carousel motor, install test speed code wheel (6) on the other end of carousel motor, with black body stove electricity is connected and is used for setting for and control the control box of black body stove temperature, with carousel motor electricity is connected and is used for control carousel (52) speed's adjustable constant voltage power supply (6) The spark baffle is arranged between the blackbody furnace and the rotary disc (52), the rotary disc (52) is provided with a second hole (51) with the diameter larger than that of the first hole, when the first hole is overlapped with the second hole (51), a simulated spark signal which has a certain temperature, a specific shape and size and a certain moving speed and is used for detecting the spark detector is formed, the speed measuring code disc (6) is used for calculating the rotating angular speed of the rotary disc (52) so as to simulate different wind speeds in a dust explosion environment, and the dual-channel oscilloscope can be respectively used for measuring the spark detector signal and the rotary disc (52) rotating speed.
2. The performance testing device for the spark detector for dust explosion prevention according to claim 1, wherein: the number of first holes may be one or more so as to simulate a single or clustered spark.
3. The performance testing device for the spark detector for dust explosion prevention according to claim 1, wherein: the first apertures may be of varying sizes and shapes including, but not limited to, one or more of circular, square, star, triangular, and irregular shapes.
4. The performance testing device for the spark detector for dust explosion prevention according to claim 1, wherein: the distance between the rotary disc (52) and the furnace mouth (31) of the blackbody furnace is not less than 5 cm.
5. The performance testing device for the spark detector for dust explosion prevention according to claim 1, wherein: the testing device further comprises a sliding guide rail, a micro-motion platform and an angle sensor, wherein the sliding guide rail is arranged in front of a blackbody furnace mouth (31) and parallel to a central axis of a furnace body (32) of the blackbody furnace, the micro-motion platform is in sliding connection with the sliding guide rail, the angle sensor is connected with the micro-motion platform, a spark detector testing position is fixedly arranged on the micro-motion platform, and the micro-motion platform can perform angle four-dimensional adjustment on an X axis, a Y axis, a Z axis and an XY plane, so that the distance and the angle between the spark detector testing position and the blackbody furnace mouth (31) are changed.
6. The performance testing device for the spark detector for dust explosion prevention according to claim 5, wherein: and the micro-motion platform is also provided with a laser pen capable of emitting red laser.
7. The performance testing device for the spark detector for dust explosion prevention according to claim 1, wherein: the spark detector test position comprises a first L-shaped plate group and a second L-shaped plate group movably mounted on the first L-shaped plate group, the first L-shaped plate group comprises a first bottom plate (11), a first vertical plate (12) fixed at the edge of the surface of the first bottom plate (11) and perpendicular to the first bottom plate, a third hole (13) is formed in the first vertical plate (12), the second L-shaped plate group comprises a second bottom plate (23) and a second vertical plate (21) fixed on the side surface of the second bottom plate (23), a fourth hole (22) is formed in the second vertical plate (21), the relative positions of the first L-shaped plate group and the second L-shaped plate group can be adjusted, and therefore the size of the overlapping portion of the third hole (13) and the fourth hole (22) can be changed to adapt to spark detectors with different sizes.
8. A performance testing device of a spark detector for dust explosion protection according to claim 1, wherein the testing device is electrically connected in the following manner: the anode of the adjustable stabilized voltage power supply is connected with the anode of the spark detector, and the cathode of the adjustable stabilized voltage power supply is connected with the cathode of the spark detector; the signal output end of the spark detector is connected with one channel of the dual-channel oscilloscope, and the other channel of the dual-channel oscilloscope is respectively connected with a group of anodes and cathodes of the speed measuring coded disc (6); the other group of positive pole and negative pole of the speed measuring coded disc (6) are correspondingly connected with the positive pole and the negative pole of the adjustable voltage-stabilized power supply; the positive electrode of the turntable motor is connected with the positive electrode of the adjustable voltage-stabilized power supply, and the negative electrode of the turntable motor is connected with the negative electrode of the adjustable voltage-stabilized power supply.
9. A test method of a spark detector performance test device for dust explosion prevention according to any one of claims 1 to 8, characterized in that whether the spark detector to be tested is sensitive to sunlight is firstly confirmed, if so, the test is required to be carried out under a dark room condition, then the test is carried out according to the following steps, and if the spark detector to be tested is not sensitive to sunlight, the test is directly carried out according to the following steps:
(1) firstly, fixing the spark detector with the performance to be measured at a spark detector testing position, and adjusting the centers of the spark detector testing position, the furnace mouth (31) of the black body furnace and a second hole (51) of the turntable (52) to be aligned; then electrically connecting the spark detector, the blackbody furnace, the control box, the turntable motor, the dual-channel oscilloscope and the adjustable voltage-stabilized power supply;
(2) setting the blackbody furnace to be at the designated temperature, selecting the spark baffle with the smallest diameter of the opening to be installed at a furnace opening (31) of the blackbody furnace, adjusting the voltage of the stabilized voltage power supply to select the lowest simulation wind speed, and installing the test position of the spark detector at the farthest distance.
10. The test method of claim 9, wherein: in the step (2), the size of the first hole of the spark baffle is changed from small to large; changing the temperature of the black body furnace from low to high; changing the distance between the testing position of the spark detector and the furnace mouth (31) from far to near; changing the detection angle between the test position of the spark detector and the furnace mouth (31) from large to small; and adjusting the rotating speed of the rotating disc (52), namely adjusting the voltage of the adjustable voltage-stabilized power supply from low to high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807152.5A CN110595614B (en) | 2019-08-29 | Spark detector performance testing device for dust explosion prevention and testing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807152.5A CN110595614B (en) | 2019-08-29 | Spark detector performance testing device for dust explosion prevention and testing method thereof |
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| CN110595614A true CN110595614A (en) | 2019-12-20 |
| CN110595614B CN110595614B (en) | 2024-05-14 |
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