CN214030973U - Dust collector for belt feeder - Google Patents
Dust collector for belt feeder Download PDFInfo
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- CN214030973U CN214030973U CN202022639929.2U CN202022639929U CN214030973U CN 214030973 U CN214030973 U CN 214030973U CN 202022639929 U CN202022639929 U CN 202022639929U CN 214030973 U CN214030973 U CN 214030973U
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Abstract
The application relates to the field of belt conveyor transmission, in particular to a dust removal device for a belt conveyor, wherein the discharge end of the belt conveyor is provided with the dust removal device, the dust removal device comprises a water pipe and a water pump, the water pipe is arranged on a bracket and positioned above the discharge end, the water pipe is provided with a nozzle, the nozzle faces towards the discharge end of the belt conveyor, a water inlet of the water pipe is connected with the water pump through a connecting pipe, the dust removal device also comprises a dust detection control device for controlling the water outlet amount of the water pipe, the process that the belt feeder conveying material falls to subaerial to the discharge end produces the raise dust easily, and the water pump is gone into the water pipe with the water pump and is sprayed water at the discharge end through the nozzle, and the water droplet can adsorb dust particle, plays the effect of dust fall, and dust detection controlling means can reduce the extravagant phenomenon that the water yield too big leads to according to the concentration control dust collector's of dust water yield, also can reduce the unsatisfactory phenomenon of dust removal effect that the water yield undersize leads to.
Description
Technical Field
The application relates to the field of belt conveyor transmission, in particular to a dust removal device for a belt conveyor.
Background
The belt conveyor is also called as a belt conveyor and comprises a conveyor belt and a transmission roller, the conveyor belt and materials are driven to run by the friction force between the conveyor belt and the transmission roller, and granular materials and finished articles can be conveyed in the horizontal direction and the vertical direction.
Chinese utility model patent publication No. CN206901190U discloses a belt conveyor, which comprises support legs, a drum assembly, a main beam, a support plate, a motor, a transmission shaft, a sprocket, a driving drive roller, a driven drive roller, a belt, a driving belt roller and a driven belt roller; the main beam is arranged on the support legs; the roller assembly and the supporting plate are respectively arranged on the main beam; the transmission shaft is respectively connected with the driving roller and the driven driving roller; the driving roller is connected with the chain wheel; the chain wheel is connected with a rotating shaft of the motor; the driving belt roller and the driven belt roller are respectively positioned at two ends of the main beam; the belt is of a closed ring-shaped structure; the driving belt roller and the driven belt roller are respectively positioned at two ends in the closed ring-shaped structure ring; the driving roller penetrates through the driving belt roller; the driving roller is connected with the driving belt roller shaft; the driven driving roller penetrates through the driven belt roller; the driven driving roller is connected with the driven belt roller shaft.
To the correlation technique among the above-mentioned, the inventor thinks that the belt feeder is when the transportation granular material, produces the raise dust easily when the material falls from the discharge end of belt feeder, is unfavorable for the clean and tidy of workshop environment.
SUMMERY OF THE UTILITY MODEL
Produce the phenomenon of raise dust easily when falling in order to improve the material from the discharge end of belt feeder, this application provides a dust collector for belt feeder.
The application provides a dust collector for belt feeder adopts following technical scheme:
the utility model provides a dust collector for belt feeder, the belt feeder includes support, conveyer belt, drive roll, driven voller and driving motor, drive roll and driven voller are all connected on the support, driving motor and drive roll coaxial coupling, the conveyer belt cover is in the outside of drive roller, the discharge end of belt feeder is provided with dust collector, dust collector includes water pipe and water pump, the top that lies in the discharge end on the support is installed to the water pipe, is provided with the nozzle on the water pipe, the nozzle is towards the discharge end of belt feeder, the water inlet of water pipe passes through the connecting pipe and the water pump is connected, dust collector still includes the dust detection controlling means who controls the water pipe water yield.
Through adopting above-mentioned technical scheme, belt feeder conveying material can drop subaerially from the conveyer belt to discharge end department, this process produces the raise dust easily, the water pump is gone into the water pipe with the water pump and is spouted water at the discharge end through the nozzle, the water droplet can adsorb the dust particle, play the effect of dust fall, make the air of discharge end department keep clean and tidy, dust detection controlling means can be according to the concentration control dust collector's of dust water yield, reduce the extravagant phenomenon that the water yield too big leads to, also can reduce the unsatisfactory phenomenon of dust removal effect that the water yield undersize leads to.
Optionally, the nozzle is provided with a plurality of, evenly distributed on the water pipe.
Through adopting above-mentioned technical scheme, a plurality of nozzles can play more abundant humidification effect to the discharge end, and nozzle evenly distributed makes discharge end material everywhere can both be spouted the water, has reduced the insufficient phenomenon that leads to producing the raise dust of humidification.
Optionally, the discharge end of belt feeder is provided with the fender hopper, the water pipe sets up the top at the fender hopper.
Through adopting above-mentioned technical scheme, the material still has the motion component in the horizontal direction because inertia influences when conveying to the discharge end through the conveyer belt, keeps off the position of fighting in the place ahead of belt feeder discharge end, can prevent the motion of material in the moisture direction, makes the material can fall to predetermined position, and the material whereabouts in-process can produce the raise dust, and the water pipe passes through the nozzle and spouts water in keeping off the material device top, plays the effect of dust fall.
Optionally, a valve for adjusting water inflow is arranged on the connecting pipe, and a signal output end of the dust detection control device is electrically connected with the valve to control water outflow.
Through adopting above-mentioned technical scheme, dust detection controlling means's signal output part is connected with the valve electricity, and the turned angle of valve is little when dust concentration is low, and dust collector's water spray volume is little, and the turned angle of valve is big when dust concentration is high, and dust collector's water spray volume is big.
Optionally, the dust detection control device includes:
the dust sensor is arranged at the feed inlet of the blocking hopper and used for detecting the dust concentration at the discharge end of the belt conveyor and outputting a dust concentration signal K1;
the signal input end of the comparison circuit is electrically connected with the output end of the dust sensor, and the comparison circuit is used for comparing the actual concentration of the dust with the preset concentration and outputting a comparison signal K2;
and the signal input end of the control circuit is electrically connected with the output end of the comparison circuit and is used for receiving the comparison signal K2, and the signal output end of the control circuit is electrically connected with the valve and is used for controlling the valve to regulate the water yield.
By adopting the technical scheme, the dust sensor detects the dust concentration at the discharge end of the belt conveyor and inputs a dust concentration signal K1 into the comparison circuit; the comparison circuit can compare the actual concentration of the dust with the preset concentration and output a comparison signal K2, and the control circuit controls the rotation angle of the valve according to the comparison signal K2 to adjust the water yield.
Optionally, the comparison circuit includes:
the voltage division circuit is formed by connecting two resistors in series, the threshold value of the dust concentration is output at the connecting point of the two resistors, n groups of voltage division circuits are arranged, n is not less than 3 and is an integer, and the threshold values of all the groups of voltage division circuits are different;
the comparator is used for comparing the actual concentration of the dust with the threshold concentration, and the set number of the comparators is consistent with that of the voltage division circuits and corresponds to the voltage division circuits one by one; the non-inverting input ends of the comparators are electrically connected with the output ends of the dust sensors, and the inverting input ends of the comparators are electrically connected with the output ends of the corresponding voltage division circuits; wherein the content of the first and second substances,
the corresponding comparators are named as a comparator ADC _1 to a comparator ADC _ n in sequence from low to high according to the threshold of the voltage division circuit.
By adopting the technical scheme, the voltage division circuit is used for setting the dust concentration threshold, and the comparator is used for comparing the actual concentration of dust with the threshold concentration. When the dust concentration is less than the threshold concentration, outputting 0 by a comparator corresponding to the voltage division circuit; when the dust concentration is greater than the threshold concentration, the comparator corresponding to the voltage dividing circuit outputs 1.
Optionally, the control circuit includes n-1 NOT gates AND n-1 AND gates AND,
the output ends of the comparators ADC _2 to ADC _ n are connected with the input end of the NOT;
n-1 AND gates AND are named as AND gate AND _1 to AND gate AND _ (n-1) in sequence; the input end of the AND gate AND _ m is connected with the output end of the comparator ADC _ m AND the output ends of NOTs corresponding to the comparators ADC _ (m +1) to ADC _ n, wherein m is more than or equal to 1 AND less than n, AND m is an integer;
the output ends of the n-1 AND gates AND the output end of the comparator ADC _ n are connected with the valve.
Through adopting above-mentioned technical scheme, be provided with the multiunit threshold value, compare the actual dust concentration signal of dust sensor output with different threshold values, can be according to the signal to the valve that the threshold value output corresponds that corresponds to according to the effect of dust concentration automatically regulated water yield, reduced the extravagant phenomenon that the water spray volume is too much to lead to, also reduced the not good phenomenon of dust fall effect that the water spray volume leads to too little.
In summary, the present application includes at least one of the following beneficial technical effects:
1. a water pipe is arranged at the discharge end of the belt conveyor, a nozzle is arranged on the water pipe, and dust is reduced at the discharge end by spraying water, so that the cleanness of a workshop environment is facilitated;
2. be provided with dust detection controlling means in the dust collector, can reduce the extravagant phenomenon that the water spray volume too much leads to according to the water yield of dust concentration automatically regulated water pipe, also reduced the not good phenomenon of dust fall effect that the water spray volume too little leads to.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
fig. 2 is a circuit diagram of a dust detection control device in an embodiment of the present application.
Description of reference numerals: 100. a belt conveyor; 110. a support; 120. a conveyor belt; 130. a drive roll; 140. a drive motor; 200. a dust removal device; 210. a water pipe; 211. a nozzle; 220. a water pump; 230. a connecting pipe; 300. a material blocking hopper; 400. a valve; 500. a water tank; 600. a dust detection control device; 610. a comparison circuit; 611. a voltage dividing circuit; 620. a control circuit; 630. a dust sensor.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a dust collector for belt feeder.
Referring to fig. 1, the belt conveyor 100 includes a support 110, a driving roller 130 and a driven roller are rotatably connected to two ends of the support 110, a driving motor 140 is further installed on the support 110, an output of the driving motor 140 is connected to the driving roller 130 in a key manner, a conveyor belt 120 is sleeved outside the driving roller 130 and the driven roller, a material blocking hopper 300 is arranged at a material discharging end of the belt conveyor 100, and the material drops downwards due to a limiting effect of the material blocking hopper 300 when being transported to the material discharging end of the belt conveyor 100. Because the material can produce the dust at the in-process of whereabouts and cause the pollution to workshop environment, discharge end department in belt feeder 100 is provided with dust collector 200 in order to improve this phenomenon, dust collector 200 includes water pipe 210 and water pump 220, water pipe 210 fixed connection links to each other with water pump 220 through connecting pipe 230 behind the fender hopper 300 top, water pump 220 links to each other with the water tank 500 that is used for the water storage, water pump 220 goes into water pipe 210 with water pump 220 in the water tank 500 in, nozzle 211 on the water pipe 210 can spray water to belt feeder 100's discharge end department, play the effect of dust fall. Because evenly be provided with a plurality of nozzles 211 on the water pipe 210, can all spray water to the material everywhere of discharge end for the dust fall is more abundant. Set up the valve 400 that is used for adjusting the inflow in water pipe 210 on the connecting pipe 230, valve 400 is the solenoid valve in this application embodiment, can pass through electric control turned angle, and the turned angle of valve 400 is big when dust concentration is high, and the inflow in water pipe 210 is big, and the turned angle of valve 400 is little when dust concentration is low, and the inflow in water pipe 210 is little.
Referring to fig. 2, the water yield of the dust removing device 200 is controlled by a dust detection control device 600, the dust detection control device 600 comprises a dust sensor 630, a comparison circuit 610 and a control circuit 620, the dust sensor 630 is installed at the feed inlet of the material blocking hopper 300 and is used for detecting the dust concentration at the discharge end of the belt conveyor 100 and outputting a detection signal K1. The comparison circuit 610 is used for receiving the detection signal K1, comparing the actual concentration of the dust with the preset concentration, and outputting a comparison signal K2. The control circuit 620 is used for receiving the comparison signal and controlling the valve 400. In order to save water, n groups of comparison circuits (n is more than or equal to 3 and n is an integer) are arranged to automatically adjust the water spraying amount, the water spraying amount is large when the dust concentration is high, and the water spraying amount is small when the dust concentration is low.
The comparison circuit 610 includes a voltage division circuit 611 and a comparator, the voltage division circuit 611 is used for setting a water spraying threshold of the dust removing device 200, and the comparator is used for comparing the actual dust concentration with the water spraying threshold. The voltage dividing circuit 611 is formed by connecting two resistors in series, the threshold value of the dust concentration is output at the connecting point of the two resistors, n groups of voltage dividing circuits 611 are arranged, and the water spraying threshold value of each group of voltage dividing circuits 611 is different. The number of the comparators is the same as that of the voltage dividing circuits 611, and the comparators are in one-to-one correspondence with the voltage dividing circuits 611, the non-inverting input ends of the comparators are electrically connected with the output ends of the dust sensors 630, and the inverting input ends of the comparators are electrically connected with the output ends of the respective voltage dividing circuits 611. The comparators are sequentially named as a comparator ADC _1, a comparator ADC _2 and a comparator ADC _ n in the order from low to high according to the threshold of the voltage dividing circuit 611.
The control circuit (620) comprises n-1 NOTs AND n-1 AND gates, AND the output ends of the comparators ADC _2 to ADC _ n are connected with the input end of the NOT; n-1 AND gates AND are named as AND gate AND _1 to AND gate AND _ (n-1) in sequence; the input end of the AND gate AND _ m is connected with the output end of the comparator ADC _ m AND the output ends of NOTs corresponding to the comparators ADC (m +1) to ADCn, wherein m is more than or equal to 1 AND less than n, AND m is an integer; the output terminals of the n-1 AND gates AND the output terminal of the comparator ADC _ n are both connected to the valve 400.
In the embodiment of the present application, taking n as 3 for example, the water spraying thresholds of the dust removing device 200 are set to 3 groups, which are respectively a low threshold, a medium threshold and a high threshold. The voltage dividing circuit 611 includes a low threshold circuit, a medium threshold circuit, and a high threshold circuit corresponding to the low threshold, the medium threshold, and the high threshold, the low threshold circuit being formed by connecting a resistor R1 and a resistor R2 in series, and the low threshold being output at a connection point of the resistor R1 and the resistor R2; the middle threshold circuit is formed by connecting a resistor R3 and a resistor R4 in series, and a middle threshold is output at the connection point of the resistor R3 and the resistor R4; the high threshold circuit is formed by connecting a resistor R5 and a resistor R6 in series, and a high threshold is output at the connection point of the resistor R5 and the resistor R6.
The number of the comparators is also 3 groups in accordance with the number of the voltage dividing circuits 611, and the comparators are named as a comparator ADC _1, a comparator ADC _2 and a comparator ADC _3 in sequence. The non-inverting input of the comparator ADC _1 is electrically connected to the dust sensor 630 and the inverting input is electrically connected to the low threshold circuit. The non-inverting input of the comparator ADC _2 is electrically connected to the dust sensor 630, and the inverting input is electrically connected to the middle threshold circuit. The non-inverting input of comparator ADC _3 is electrically connected to dust sensor 630 and the inverting input is electrically connected to the high threshold circuit.
The control circuit 620 includes 2 NOT gates AND 2 AND gates AND, the AND gates AND are sequentially named as an AND gate AND _1 AND an AND gate AND _2, AND the NOT gates NOT are sequentially named as an NOT gate NOT _1 AND an NOT gate NOT _ 2.
In the embodiment, the AND gate AND _1 is a 3-input AND gate, AND the output end of the comparator ADC _1 is connected to the first input end of the AND gate AND _ 1; the output end of the comparator ADC _2 is connected with the input end of the NOT _1, AND the output end of the NOT _1 is connected with the second input end of the AND gate AND _ 1; the output end of the comparator ADC _3 is connected with the input end of the NOT _2, the output end of the NOT _2 is connected with the third input end of the AND gate AND _1, AND the output end of the AND gate AND _1 is connected with the valve 400.
In the embodiment, the AND gate AND _2 is a 2-input AND gate, AND the output end of the comparator ADC _2 is connected to the first input end of the AND gate AND _ 2; the output end of the comparator ADC _3 is connected to the input end of the NOT gate NOT _2, the output end of the NOT gate NOT _2 is connected to the second input end of the AND gate AND _2, AND the output end of the AND gate AND _2 is connected to the valve 400.
The output of comparator ADC _3 is connected to valve 400.
The implementation principle of the dust removal device for the belt conveyor in the embodiment of the application is as follows:
when the material is conveyed to the discharge end of the belt conveyor 100 through the conveyor belt 120, the material falls down to a designated position under the limiting action of the material blocking hopper 300, dust is generated in the falling process, the dust sensor 630 located inside the material blocking hopper 300 detects the concentration of the dust, and outputs a detection signal K1 to be input into the comparison circuit 610; the comparison circuit 610 compares the actual concentration of the dust with a threshold concentration, and outputs a comparison signal K2 to be input into the control circuit 620; the control circuit 620 controls the rotation angle of the valve 400 according to the comparison signal, so that the water yield of the water pipe 210 is adapted to the dust concentration, the waste caused by excessive water is reduced, and the phenomenon of non-ideal dust removal effect caused by too little water is also reduced.
When the dust concentration is smaller than the low threshold, the comparator ADC _1 outputs 0, AND the AND gate AND _1 outputs 0; the comparator ADC _2 outputs 0, AND the AND gate AND _2 outputs 0; comparator ADC _3 outputs 0, at this time, valve 400 does not rotate, and water pipe 210 does not discharge water.
When the dust concentration is greater than the low threshold AND less than the medium threshold, 1 is output by the comparator ADC _1, 0 is output by the comparator ADC _2, 1 is output after conversion by the NOT gate NOT _1, 0 is output by the comparator ADC _3, 1 is output after conversion by the NOT gate NOT _2, AND at the moment, 1 is output by the AND gate AND _ 1; the comparator ADC _2 outputs 0, AND the AND gate AND _2 outputs 0; the comparator ADC _3 outputs 0, and at this time, the valve 400 has the smallest rotation angle, and the water outlet amount of the water pipe 210 is the smallest.
When the dust concentration is greater than the middle threshold AND less than the high threshold, the comparator ADC _1 outputs 1, the comparator ADC _2 outputs 1, the 1 is converted by the NOT _1 AND then outputs 0, AND the AND gate AND _1 outputs 0 at the moment; the comparator ADC _2 outputs 1, the comparator ADC _3 outputs 0, the output is 1 after conversion through the NOT _2, AND the AND gate AND _2 outputs 1 at the moment; the comparator ADC _3 outputs 0, and at this time, the valve 400 rotates at a medium angle, and the water output of the water pipe 210 is medium.
When the dust concentration is larger than the high threshold, 1 is output by the comparator ADC _1, 1 is output by the comparator ADC _2, 0 is output after conversion by the NOT _1, AND 0 is output by the AND gate AND _ 1; the comparator ADC _2 outputs 1, the comparator ADC _3 outputs 1, the 1 is converted by the NOT gate NOT _2 AND then outputs 0, AND the AND gate AND _2 outputs 0 at the moment; the comparator ADC _3 outputs 1, and at this time, the valve 400 has the largest rotation angle, and the water outlet amount of the water pipe 210 is the largest.
Thereby reach the effect of adjusting the water yield according to the dust concentration of difference, reduced the extravagant phenomenon that the water spray volume too much leads to, also reduced the not good phenomenon of dust fall effect that the water spray volume too little leads to.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a dust collector for belt feeder, belt feeder (100) includes support (110), conveyer belt (120), drive roll (130), driven voller and driving motor (140), drive roll (130) and driven voller are all connected on support (110), driving motor (140) and drive roll (130) coaxial coupling, conveyer belt (120) cover is in the outside of drive roll (130) and driven voller, its characterized in that, the discharge end of belt feeder (100) is provided with dust collector (200), dust collector (200) include water pipe (210) and water pump (220), water pipe (210) are installed and are located the top of discharge end on support (110), are provided with nozzle (211) on water pipe (210), nozzle (211) are towards the discharge end of belt feeder (100), the water inlet of water pipe (210) passes through connecting pipe (230) and water pump (220) is connected, the dust removal device (200) further comprises a dust detection control device (600) for controlling the water yield of the water pipe (210).
2. The dust removing device for the belt conveyor as claimed in claim 1, wherein the plurality of nozzles (211) are uniformly distributed on the water pipe (210).
3. The dust removing device for the belt conveyor as claimed in claim 2, wherein a material blocking hopper (300) is arranged at the discharge end of the belt conveyor (100), and the water pipe (210) is arranged above the material blocking hopper (300).
4. The dust removing device for the belt conveyor of claim 3, wherein a valve (400) for adjusting water inflow is arranged on the connecting pipe (230), and a signal output end of the dust detection control device (600) is electrically connected with the valve (400) to control water outflow.
5. The dust removing device for a belt conveyor according to claim 4, wherein the dust detection control device (600) comprises:
the dust sensor (630) is arranged at the feed inlet of the blocking hopper (300) and used for detecting the dust concentration at the discharge end of the belt conveyor (100) and outputting a dust concentration signal K1;
the signal input end of the comparison circuit (610) is electrically connected with the output end of the dust sensor (630), and the comparison circuit is used for comparing the actual concentration of the dust with the preset concentration and outputting a comparison signal K2;
and the signal input end of the control circuit (620) is electrically connected with the output end of the comparison circuit (610) and is used for receiving the comparison signal K2, and the signal output end of the control circuit is electrically connected with the valve (400) and is used for controlling the valve (400) to adjust the water yield.
6. The dust removing device for a belt conveyor of claim 5, wherein the comparing circuit (610) comprises:
the voltage division circuit (611) is formed by connecting two resistors in series, the connecting point of the two resistors outputs the threshold value of the dust concentration, the voltage division circuit (611) is provided with n groups, n is not less than 3 and is an integer, and the threshold value of each group of voltage division circuit (611) is different;
the comparator is used for comparing the actual concentration of the dust with the threshold concentration, the set number of the comparators is consistent with that of the voltage division circuits (611), and the comparators are in one-to-one correspondence with the voltage division circuits (611); the non-inverting input ends of the comparators are electrically connected with the output end of the dust sensor (630), and the inverting input ends of the comparators are electrically connected with the output ends of the corresponding voltage division circuits (611); wherein the content of the first and second substances,
the corresponding comparators are named as a comparator ADC _1 to a comparator ADC _ n in sequence from low to high according to the threshold of the voltage division circuit (611).
7. The dust removing device for a belt conveyor of claim 6, wherein the control circuit (620) comprises n-1 NOTs AND n-1 AND gates AND,
the output ends of the comparators ADC _2 to ADC _ n are connected with the input end of the NOT;
n-1 AND gates AND are named as AND gate AND _1 to AND gate AND _ (n-1) in sequence; the input end of the AND gate AND _ m is connected with the output end of the comparator ADC _ m AND the output ends of NOTs corresponding to the comparators ADC (m +1) to ADC _ n, wherein m is more than or equal to 1 AND less than n, AND m is an integer;
the output ends of the n-1 AND gates AND the output end of the comparator ADC _ n are connected with a valve (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022639929.2U CN214030973U (en) | 2020-11-14 | 2020-11-14 | Dust collector for belt feeder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022639929.2U CN214030973U (en) | 2020-11-14 | 2020-11-14 | Dust collector for belt feeder |
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| CN214030973U true CN214030973U (en) | 2021-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115447880A (en) * | 2022-09-23 | 2022-12-09 | 崇义县源德矿业有限公司 | Quartz sand is carried and is used intelligent dust device |
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2020
- 2020-11-14 CN CN202022639929.2U patent/CN214030973U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115447880A (en) * | 2022-09-23 | 2022-12-09 | 崇义县源德矿业有限公司 | Quartz sand is carried and is used intelligent dust device |
| CN115447880B (en) * | 2022-09-23 | 2023-04-11 | 崇义县源德矿业有限公司 | Quartz sand is carried and is used intelligent dust device |
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