CN208694582U - Central dust-extraction unit - Google Patents
Central dust-extraction unit Download PDFInfo
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- CN208694582U CN208694582U CN201821121797.0U CN201821121797U CN208694582U CN 208694582 U CN208694582 U CN 208694582U CN 201821121797 U CN201821121797 U CN 201821121797U CN 208694582 U CN208694582 U CN 208694582U
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- dust
- dust removal
- filtration case
- extraction unit
- air inlet
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Abstract
The utility model discloses a kind of central dust-extraction unit, including dust removal and filtration case, the bottom of dust removal and filtration case opens up dust mouth, and activity installation discharging plate on dust mouth, the lower section of dust mouth is arranged spiral discharge apparatus, air inlet is arranged on the wall box of dust removal and filtration case；Further include: explosion-protection equipment；Explosion-protection equipment includes flame proof valve, temperature sensor, controller and sprayer；Flame proof valve is set on air inlet, and temperature sensor is set in dust removal and filtration case, and the output end of temperature sensor and the input terminal of controller connect, and the output end of controller is connect with the solenoid valve in flame proof valve and sprayer respectively.The utility model, so that preventing the generation of explosion when there is the danger of dust explosion, using explosion-protection equipment, to take necessary explosion precaution when temperature increases in dust removal and filtration case, reduces dangerous a possibility that occurring by the way that explosion-protection equipment is arranged in dust removal and filtration case.
Description
Technical field
The utility model relates to environmental protecting device technical field more particularly to a kind of central dust-extraction units.
Background technique
The dust pollution generated at present for traditional workshop, is cleared up by cleaner.Dedusting is set
For after prolonged use, dust accumulation easily leads to dust explosion.To avoid dust explosion from jeopardizing production and the people of staff
Body safety needs to be replaced frequently filter bag, and the dust in dust removal and filtration case is cleared up in timing.But this kind of mode, it can not accomplish
It is perfectly safe, not in time or dust accumulation serious situation if any cleaning, it also occur that dust explosion.
Utility model content
To solve in the prior art, traditional central dust-extraction unit deposits the inside powder of dust removal and filtration case after prolonged use
Dirt accumulation, the technical issues of easily explosion, the technical solution of the utility model is as follows:
Central dust-extraction unit, including dust removal and filtration case, the bottom of dust removal and filtration case open up dust mouth, activity peace on dust mouth
Loading and unloading plate, the lower section of dust mouth are arranged spiral discharge apparatus, air inlet are arranged on the wall box of dust removal and filtration case；Also wrap
It includes: explosion-protection equipment；The explosion-protection equipment includes flame proof valve, temperature sensor, controller and sprayer；The flame proof valve is set to
On air inlet, temperature sensor is set in dust removal and filtration case, and the output end of temperature sensor and the input terminal of controller connect,
The output end of controller is connect with the solenoid valve in flame proof valve and sprayer respectively；When the dust removal and filtration case of temperature sensor monitoring
When interior temperature is more than preset temperature in controller, controller controls flame proof valve and closes, and opens the solenoid valve in sprayer,
Make sprayer spray cooling.
Further technical solution is that filter bag is arranged in dust removal and filtration case among the above, and filter bag is fixed by skeleton
It is mounted in dust removal and filtration case, and is located at the top of air inlet in the vertical direction；
The top opening of filter bag, and pulse spraying equipment, the air entry of pulse spraying equipment is arranged in the top of filter bag
It is oppositely arranged in the vertical direction with the top opening of filter bag.
Further technical solution is that the atomizing nozzle of the sprayer is arranged in dust removal and filtration case, is located at dust mouth
Between air inlet.
Further technical solution is to connect admission line, the top of the box of dust removal and filtration case on air inlet among the above
Exhaust outlet is opened up, and exhaust outlet is located at the top of filter bag in the vertical direction；
Exhaust pipe is installed on exhaust pipe, silencer and blower are installed on exhaust pipe, blower passes through the control of automatic frequency-conversion controller
System connection.
Further technical solution is to also set up guiding inclined plate in dust removal and filtration case among the above, is oriented to inclined plate in level
It is oppositely arranged on direction with air inlet, the top for being oriented to inclined plate is connect by hinge with the cabinet wall of dust removal and filtration case, is oriented to
The bottom end of inclined plate is arranged in dust removal and filtration case by support rod.
Further technical solution is to open up through-hole on the cabinet of dust removal and filtration case among the above, and one end of support rod is logical
It crosses spherical surface auxiliary structure to be fixedly connected with guiding inclined plate, the other end passes through through-hole and is arranged in outside the cabinet of dust removal and filtration case, supports
The shaft of bar is flexibly connected with the inner hole wall of through-hole.
Further technical solution is that the first screw thread is arranged on the inner hole wall of through-hole among the above, on the shaft of support rod
Second screw thread is set, and support rod is connect with the cooperation of the second screw thread with through-hole by the first screw thread.
Further technical solution is that resettlement groove is arranged on the cabinet of dust removal and filtration case among the above, and sprayer is sprayed
Pipe is located in resettlement groove, and the atomizing nozzle on injection spray pipe is towards being arranged in the cabinet of dust removal and filtration case.
Further technical solution is that rain eyebrow is arranged in the top of atomizing nozzle among the above, and rain eyebrow is fixedly mounted on dedusting
On the cabinet wall of filter box.
Further technical solution is that above-mentioned moderate rain eyebrow includes being fixedly mounted on the cabinet wall of dust removal and filtration case
Upper eyebrow and lower eyebrow, upper eyebrow tilts down setting, and lower eyebrow is obliquely installed upwards, the bottom end of upper eyebrow and upper eyebrow
Top is fixed together, and constitutes v-shaped folded plate structure.
Compared with prior art, the beneficial effects of the utility model are at least one of following:
1, the utility model is by being arranged explosion-protection equipment in dust removal and filtration case, so that when having dust quick-fried in dust removal and filtration case
Fried danger, using explosion-protection equipment, takes necessary explosion precaution when temperature increases, and prevents the generation of explosion, reduces dangerous hair
A possibility that raw.
2, the utility model is drenched dust by injection spray pipe, so that the dust in air and steam are blended in one
It rises, so that dust is fallen directly down by gravity, and then improves the collecting effect of dust.
3, the utility model is by being arranged injection spray pipe between dust mouth and air inlet, so that the atomizing nozzle on injection spray pipe
In sprinkling, steam is avoided to enter air inlet, so that the outlet efficiency of air inlet declines.
Detailed description of the invention
Fig. 1 is structural schematic diagram in the utility model；
Fig. 2 is the structural schematic diagram with guiding inclined plate in the utility model；
Fig. 3 is the partial structural diagram at the utility model dust removal and filtration case internal spraying pipe；
Fig. 4 is the partial structural diagram that the utility model dust removal and filtration case internal spraying pipe is placed in resettlement groove；
Fig. 5 is the structural schematic diagram of the utility model rain eyebrow.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Embodiment 1:
As shown in Figure 1, central dust-extraction unit, including dust removal and filtration case 1, the bottom of dust removal and filtration case 1 open up dust mouth 2,
Spiral discharge apparatus 11, the case-side of dust removal and filtration case 1 is arranged in activity installation discharging plate 10 on dust mouth, the lower section of dust mouth 2
Air inlet 3 is set on wall, by the way that discharging plate 10 and spiral discharge apparatus 11 are arranged on dust mouth 2, to improve dust
Collection efficiency, to reduce workload.Further include: explosion-protection equipment；The explosion-protection equipment includes flame proof valve 25, temperature sensing
Device, controller and sprayer；The flame proof valve 25 is set on air inlet 3, and temperature sensor is set in dust removal and filtration case, temperature
The input terminal of the output end and controller of spending sensor connects, and the output end of controller is respectively and in flame proof valve 25 and sprayer
Solenoid valve connection；When the temperature in the dust removal and filtration case of temperature sensor monitoring is more than preset temperature in controller, control
Device controls flame proof valve and closes, and opens the solenoid valve in sprayer, makes sprayer spray cooling.The atomizing nozzle 5 of sprayer is arranged
In dust removal and filtration case 1, between dust mouth 2 and air inlet 3.
In the present embodiment, in order to which the inside for solving dust removal and filtration case existing for traditional central dust-extraction unit is excessively dry
Dry, dust accumulation, the problem of easily causing dust explosion, is provided with explosion-protection equipment, so that dangerous situation is found before explosion occurs,
Flame proof valve 25 is closed in time and opens sprayer, achievees the purpose that cooling is explosion-proof.Dust removal and filtration case 1 be used for dust in air into
Row is separated by filtration, and the dust after separation is collected by dust mouth 2, and the air with dust is then entered from air inlet 3
In dust removal and filtration case 1, and sprayer can then be connect with external water source, and external water source is carried out atomization spray by atomizing nozzle 5
It is arrived in dust removal and filtration case 1 out, since the atomizing nozzle 5 of sprayer is between dust mouth 2 and air inlet 3, atomizing nozzle 5 is spraying
When mist, penetrating can be reduced to the steam in air inlet 3, to avoid steam from directly contacting and mix with dust, then
Fall in air inlet 3, when long-time after the mixture accumulated it is more and more, to influence the outlet efficiency of air inlet.
Embodiment 2:
As shown in Figure 1, 2, comparison and embodiment 1, the present embodiment optimize dust removal and filtration case 1, setting in dust removal and filtration case 1
Filter bag 6, filter bag 6 are fixedly mounted in dust removal and filtration case 1 by skeleton 7, and in the vertical direction positioned at the upper of air inlet 3
Side；The top opening 8 of filter bag 6, and pulse spraying equipment 9, the air entry of pulse spraying equipment 9 is arranged in the top of filter bag 6
It is oppositely arranged in the vertical direction with the top opening 8 of filter bag 6.
In the present embodiment, after prolonged use due to dust removal and filtration case 1, meeting on the filter bag 6 in dust removal and filtration case 1
Gather a large amount of dust, in this way when being filtered, will affect the using effect of filter bag 6, therefore pulse spraying equipment is set
9, so that in use for some time, by 9 energy automatism of pulse spraying equipment in filter bag 6, enabling filter bag 6 unexpected
It is shunk, due to the effect of skeleton 7, so that filter bag 6 is shaken when shrinking, so as to effectively will be on filter bag 6
Dust tremble down, to improve the using effect of filter bag 6, and extend the time between overhauls(TBO) by manually overhauling, Jin Erti
High working efficiency, in the specific use process, filter bag 6 is mounted in dust removal and filtration case 1 by skeleton 7, has dust
Air when by filter bag 6, dust stays in the outside of filter bag 6, filtered air by filter bag 6 again via top
8 discharge of portion's opening, pulse spraying equipment 9 include air intake duct, solenoid valve, motor and air bag, the air intake duct position of pulse spraying equipment 9
In in the top opening 8 of filter bag 6, solenoid valve control motor carries out the movement of air-breathing within certain cycle time, and air bag is used
In collecting gas, herein it should be noted that pulse spraying equipment 9 is to be commercially available in existing market, therefore principle herein
It repeats no more.
Embodiment 3:
As shown in Figure 1, 2, comparison and embodiment 1, the present embodiment optimize air inlet 3 and dirt Rose Box 1, on air inlet 3
Admission line 12 is connected, the top of the box of dust removal and filtration case 1 opens up exhaust outlet 13, and exhaust outlet 13 was located in the vertical direction
The top of filter bag 6；Exhaust pipe 14 is installed on exhaust outlet 13, silencer 15 is installed on exhaust pipe 14 and blower 16, blower 16 pass through
The control connection of automatic frequency-conversion controller.
In the present embodiment, in order to improve the efficiency that filtered gas is discharged dust removal and filtration case 1, therefore exhaust is set
Pipe 14, and silencer 15 and blower 16 are installed on exhaust pipe 14, by the effect of blower 16 so that the gas of dust removal and filtration case 1
It is extracted, so that the speed of service of this system and device is accelerated, simultaneously because air can be produced when being discharged by exhaust pipe 14
Raw a large amount of noise in order to eliminate the influence of noise, therefore installs silencer 15 in exhaust pipe 14, to reduce the dry of noise
It disturbs, when specifically used, it is in order to avoid exhaust outlet 13 will not that exhaust outlet 13 is located at the top of filter bag 6 in the vertical direction
It is collected by 6 filtered air of filter bag, so that the externally discharged influence environment of dust gas not up to standard will be contained.
Embodiment 4:
As shown in Fig. 2, comparison and embodiment 1, the present embodiment optimize dust removal and filtration case 1, also set up in dust removal and filtration case 1
Be oriented to inclined plate 17, guiding inclined plate 17 be oppositely arranged in the horizontal direction with air inlet 3, guiding inclined plate 17 top by hinge with
The cabinet wall of dust removal and filtration case 1 connects, and the bottom end of guiding inclined plate 17 is arranged in dust removal and filtration case 1 by support rod 18.
In the present embodiment, dust removal and filtration case 1 when in use, often has portion gas directly to opposite with filter bag 6
Direction it is mobile, in order to improve the service efficiency of filter bag 6, by the way that guiding inclined plate 17 is arranged in dust removal and filtration case 1, by leading
It will be directed directly on filter bag 6 from the air that air inlet 3 enters to inclined plate 17, so that using effect is improved, simultaneously because from
The speed for the air that air inlet 3 enters is different, therefore the inclination of guiding inclined plate 17 can be effectively adjusted by hinge and support rod 18
Angle, to further avoid portion gas directly to the direction movement opposite with filter bag 6, when specifically used, guiding is oblique
The top of plate 1 can be rotated along hinge, support rod 18 then cooperate hinge control guiding inclined plate 1 tilt angle, when from air inlet 3 into
When the speed of the air entered is lower, the inclination angle for being oriented to inclined plate 17 is larger, as shown in the figure, is oriented to bottom end and the air inlet of inclined plate 17
The spacing of mouth 3 is smaller, and when the speed of the air entered from air inlet 3 is higher, the inclination angle for being oriented to inclined plate 17 is smaller, and guiding is oblique
The bottom end of plate 17 and the spacing of air inlet 3 are larger, improve the adaptability of guiding inclined plate 17 in this way.
Embodiment 5:
As shown in Fig. 2, comparison and embodiment 5, the present embodiment, which optimizes, is oriented to inclined plate 17, on the cabinet of dust removal and filtration case 1
Through-hole 20 is opened up, one end of support rod 18 is fixedly connected by spherical surface auxiliary structure with guiding inclined plate 17, and the other end passes through through-hole 20
It is arranged in outside the cabinet of dust removal and filtration case 1, the shaft of support rod 18 is flexibly connected with the inner hole wall of through-hole 20.
In the present embodiment, the tilt angle for adjusting guiding inclined plate 17 for convenience, makes work by adjusting support rod 18
Guiding inclined plate 17 can be adjusted in the outside of dust removal and filtration case 1 by making personnel, so that the operation of guiding inclined plate 17 is more
It is convenient to add, and in the specific use process, spherical surface auxiliary structure is the prior art, makes support rod 18 and guiding by spherical surface auxiliary structure
Inclined plate 17 still keeps stable connection in angle change, and the shaft of support rod 18 is flexibly connected with the inner hole wall of through-hole 20,
The shaft of support rod 18 can be made to move in through-hole 20 in this way, to facilitate operation.
Embodiment 6:
As shown in Fig. 2, comparison and embodiment 6, the present embodiment optimizes support rod 18, and the is arranged on the inner hole wall of through-hole 20
One screw thread, is arranged the second screw thread on the shaft of support rod 18, support rod 18 by the cooperation of the first screw thread and the second screw thread with
Through-hole 20 connects.
In the present embodiment, in order to avoid support rod 18 prevents shakiness in through-hole 20, so that leading during the work time
Variation is generated to the tilt angle of inclined plate 17, therefore the first screw thread, the shaft of support rod 18 will be set on the inner hole wall of through-hole 20
The second screw thread of upper setting, by being screwed on for the first screw thread and the second screw thread, in cooperation spherical surface auxiliary structure, enable support rod 18 surely
Fixed connect with guiding inclined plate 17, and after adjusting angle, by the cooperation of the first screw thread and the second screw thread, so that guiding is oblique
The not malleable tilt angle of plate 17.
Embodiment 7:
As shown in Figure 3,4, comparison and embodiment 1, the present embodiment optimize dust removal and filtration case 1, the cabinet of dust removal and filtration case 1
The injection spray pipe 4 of upper setting resettlement groove 21, sprayer is located in resettlement groove 21, and the atomizing nozzle 5 on injection spray pipe 4 is towards dust removal and filtration case
Setting in 1 cabinet.
In the present embodiment, in order to avoid falling into dust on injection spray pipe 4 so that atomizing nozzle 5 on injection spray pipe 4 by dust with
The mixture of water blocks, therefore resettlement groove 21 is arranged, so that injection spray pipe 4 can not only stablize installation, and is also avoided that on injection spray pipe 4 and falls
Enter too many dust, influencing this injection spray pipe 4 must use.
Embodiment 8:
As shown in figure 4, comparison and embodiment 8, the present embodiment optimizes atomizing nozzle 5, and rain eyebrow is arranged in the top of atomizing nozzle 5
22, rain eyebrow 22 is fixedly mounted on the cabinet wall of dust removal and filtration case 1.
In the present embodiment, in order to further avoid falling into dust on injection spray pipe 4, so that 5 quilt of atomizing nozzle on injection spray pipe 4
The blocking of the mixture of dust and water, therefore on the basis of resettlement groove 21 are set, in the top of atomizing nozzle 5, rainy eyebrow 22 is set, from
And dust is avoided to fall on the atomizing nozzle 5 of injection spray pipe 4, the use of entire pipe is influenced, when specifically used, rain eyebrow 22 can be close
Atomizing nozzle 5 is arranged, can also there are certain gap settings between atomizing nozzle 5.
Embodiment 9:
As shown in Figure 4,5, comparison and embodiment 9, the present embodiment optimize rain eyebrow 22, and rain eyebrow 22 includes being fixedly mounted on
Upper eyebrow 23 and lower eyebrow 24 on the cabinet wall of dust removal and filtration case 1, upper eyebrow 23 tilt down setting, and lower eyebrow 24 is upward
It is obliquely installed, the bottom end of upper eyebrow 23 and the top of upper eyebrow 23 are fixed together, and constitute v-shaped folded plate structure.
In the present embodiment, in order to avoid atomizing nozzle 5 is when spraying steam on the influence injection spray pipe 4 of rain eyebrow 22, part steam
Directly stopped by the rain eyebrow 22 of traditional straight-plate-type, therefore rain eyebrow 22 is arranged to upper eyebrow 23 and lower eyebrow 24, and constitute v-shaped folded plate
Structure, such steam when getting to lower eyebrow 24, can be carried out generation refraction, hence into arrive dust removal and filtration case 1 central part,
It avoids after being stopped by the rain eyebrow 22 of traditional straight-plate-type, is left directed along rain eyebrow 22, to improve using effect.
Although reference be made herein to the utility model is described in multiple explanatory embodiments of the utility model, still,
It should be understood that those skilled in the art can be designed that a lot of other modification and implementations, these modifications and implementations
It will fall within scope and spirit disclosed in the present application.More specifically, it discloses in the application, drawings and claims
In range, can building block to theme combination layout and/or layout carry out a variety of variations and modifications.In addition to building block
And/or outside the modification and improvement of layout progress, to those skilled in the art, other purposes also be will be apparent.
Claims (10)
1. central dust-extraction unit, including dust removal and filtration case, the bottom of dust removal and filtration case opens up dust mouth, activity installation on dust mouth
Discharging plate, the lower section of dust mouth are arranged spiral discharge apparatus, air inlet are arranged on the wall box of dust removal and filtration case, feature exists
In, further includes: explosion-protection equipment；The explosion-protection equipment includes flame proof valve, temperature sensor, controller and sprayer；The flame proof
Valve is set on air inlet, and temperature sensor is set in dust removal and filtration case, the output end of temperature sensor and controller it is defeated
Enter end connection, the output end of controller is connect with the solenoid valve in flame proof valve and sprayer respectively；When temperature sensor monitoring
When temperature in dust removal and filtration case is more than preset temperature in controller, controller controls flame proof valve and closes, and opens sprayer
Interior solenoid valve makes sprayer spray cooling.
2. center dust-extraction unit according to claim 1, it is characterised in that: filter bag is set in the dust removal and filtration case,
The filter bag is fixedly mounted in dust removal and filtration case by skeleton, and is located at the top of air inlet in the vertical direction；
The top opening of the filter bag, and pulse spraying equipment, the suction of the pulse spraying equipment is arranged in the top of filter bag
The top opening of port and filter bag is oppositely arranged in the vertical direction.
3. center dust-extraction unit according to claim 1, it is characterised in that: the atomizing nozzle of the sprayer is arranged in dedusting
In Rose Box, between dust mouth and air inlet.
4. center dust-extraction unit according to claim 1, it is characterised in that: connect admission line, institute on the air inlet
The top of the box for stating dust removal and filtration case opens up exhaust outlet, and exhaust outlet is located at the top of filter bag in the vertical direction；
Exhaust pipe is installed on the exhaust outlet, silencer is installed on the exhaust pipe and blower, the blower pass through automatic frequency-conversion
Controller control connection.
5. center dust-extraction unit according to claim 1, it is characterised in that: it is oblique to also set up guiding in the dust removal and filtration case
Plate, the guiding inclined plate are oppositely arranged with air inlet in the horizontal direction, and the top for being oriented to inclined plate passes through hinge and dust removal and filtration
The cabinet wall of case connects, and the bottom end for being oriented to inclined plate is arranged in dust removal and filtration case by support rod.
6. center dust-extraction unit according to claim 5, it is characterised in that: opened up on the cabinet of the dust removal and filtration case logical
The one end in hole, the support rod is fixedly connected by spherical surface auxiliary structure with guiding inclined plate, and the other end passes through through-hole and is arranged in dedusting
Outside the cabinet of Rose Box, the shaft of the support rod is flexibly connected with the inner hole wall of through-hole.
7. center dust-extraction unit according to claim 6, it is characterised in that: the first spiral shell is arranged on the inner hole wall of the through-hole
Line, is arranged the second screw thread on the shaft of the support rod, the support rod by the cooperation of the first screw thread and the second screw thread with
Through-hole connection.
8. center dust-extraction unit according to claim 1, it is characterised in that: peace is arranged on the cabinet of the dust removal and filtration case
Slot is set, the injection spray pipe of the sprayer is located in resettlement groove, and the atomizing nozzle on injection spray pipe is towards setting in the cabinet of dust removal and filtration case
It sets.
9. center dust-extraction unit according to claim 8, it is characterised in that: rain eyebrow, institute is arranged in the top of the atomizing nozzle
Rain eyebrow is stated to be fixedly mounted on the cabinet wall of dust removal and filtration case.
10. center dust-extraction unit according to claim 9, it is characterised in that: the rain eyebrow includes being fixedly mounted on to remove
Upper eyebrow and lower eyebrow on the cabinet wall of dirt Rose Box, the upper eyebrow tilt down setting, and lower eyebrow tilts set upwards
It sets, the bottom end of the upper eyebrow and the top of upper eyebrow are fixed together, and constitute v-shaped folded plate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821121797.0U CN208694582U (en) | 2018-07-16 | 2018-07-16 | Central dust-extraction unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821121797.0U CN208694582U (en) | 2018-07-16 | 2018-07-16 | Central dust-extraction unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208694582U true CN208694582U (en) | 2019-04-05 |
Family
ID=65938175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821121797.0U Active CN208694582U (en) | 2018-07-16 | 2018-07-16 | Central dust-extraction unit |
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| Country | Link |
|---|---|
| CN (1) | CN208694582U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201462A (en) * | 2019-07-16 | 2019-09-06 | 广州港集团有限公司 | A kind of dust explosion protection monitoring alarm applied in deduster |
-
2018
- 2018-07-16 CN CN201821121797.0U patent/CN208694582U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110201462A (en) * | 2019-07-16 | 2019-09-06 | 广州港集团有限公司 | A kind of dust explosion protection monitoring alarm applied in deduster |
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