CN211412758U - Circulating air supply airflow grading device - Google Patents
Circulating air supply airflow grading device Download PDFInfo
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- CN211412758U CN211412758U CN201922209919.2U CN201922209919U CN211412758U CN 211412758 U CN211412758 U CN 211412758U CN 201922209919 U CN201922209919 U CN 201922209919U CN 211412758 U CN211412758 U CN 211412758U
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Abstract
The utility model discloses a circulating air supply air flow grading device, which comprises a back-blowing air storage tank, a multi-stage air flow grading device and a closed-loop air supply device; the multi-stage airflow grading equipment comprises a rotary vibration sieve, a storage tank, a spiral feeder, an airflow grader, a cyclone separator and a dust removal filter; the rotary vibration sieve, the material storage tank, the spiral feeder and the airflow classifier are sequentially connected, a plurality of cyclone separators are connected in parallel and then connected with the airflow classifier in series, a plurality of dust removing filters are connected in parallel, and the cyclone separators are connected with the dust removing filters; the closed-loop air supply equipment comprises a compressor, a precision filter, a cold dryer and an automatic air supply device; the air flow classifier is connected with the air flow classifier and the compressor; the dust removing filter is connected with the compressor and the back-blowing gas storage tank. This device can select a plurality of granularity section powder, and the simple operation practices thrift the cost, can be used to combustible powder and grades, and cyclic utilization gas can not cause the waste.
Description
Technical Field
The utility model relates to a powder classification technical field, concretely relates to circulation air feed air current grading plant.
Background
The rotary vibration sieve is the most common grading equipment in the powder industry, has high sieving efficiency, but is difficult to sieve fine powder with the particle size below 300 meshes.
For fine powder classification, the air flow classification equipment is commonly used in the industry, and the general air flow classification equipment is a classification system consisting of a separator, a cyclone separator, a dust removal filter and an induced draft fan. The airflow classification equipment can effectively separate fine powder below 300 meshes, but the separation of multi-granularity-section powder adopts a structure that a separator, a cyclone separator, a cyclone separator and the like are sequentially connected in series, so that the separation efficiency is low and the cost is high.
The open-loop fan is generally adopted for the airflow classification equipment, air is used as a classification medium, explosion is easily caused to combustible powder, the quality of powder products is affected, inert gas is not recycled, a large amount of gas is wasted, and the operation cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a it is expected to provide a circulation air feed air current grading plant, can select a plurality of granularity section powder, need not a plurality of air current graders, the simple operation practices thrift the cost, can be used to the grading of active metal powder, and cyclic utilization gas can not cause the waste.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides a circulating air supply air flow grading device, which comprises an external back-blowing air storage tank and is characterized by also comprising a multi-stage air flow grading device and a circulating air supply device; the multistage airflow grading equipment comprises a rotary vibration sieve, a storage tank, a spiral feeder, an airflow grader, a cyclone separator and a dust removal filter; the cyclone separators are connected in parallel, and are connected in series with the air classifier respectively through pipelines provided with pneumatic butterfly valves, the dust removing filters are connected in parallel, and each cyclone separator is connected with each dust removing filter through a pipeline provided with two pneumatic butterfly valves; the circulating gas supply equipment comprises a compressor, a precision filter, a cold dryer and an automatic gas supplementing device; the compressor is connected with the precision filter through a pipeline, the precision filter is connected with the cold dryer through a pipeline, a flow regulating valve is arranged between the cold dryer and the automatic air supply device through a pipeline, a pneumatic stop valve is arranged between the cold dryer and the airflow classifier through a pipeline, and the automatic air supply device is connected with the compressor through a pipeline; the dust removal filter with be equipped with the pipe connection of pneumatic butterfly valve, discharge valve between the compressor in proper order, with be equipped with the pipe connection of solenoid valve between the blowback gas holder.
Further, the multistage airflow classification equipment also comprises an ultrasonic rotary vibration sieve; the spiral feeder is connected with the ultrasonic rotary vibration sieve through a pipeline.
Further, the circulating gas supply equipment further comprises a safety filter; the safety filter is arranged between the compressor and the dust removal filter, specifically, a pipeline connection of a pneumatic butterfly valve, an exhaust valve and a safety valve is sequentially arranged between the dust removal filter and the safety filter, and the safety filter is connected with the compressor pipeline.
Preferably, the cyclone separators are connected in parallel, a pipeline of a pneumatic butterfly valve is arranged between each cyclone separator and the airflow classifier, and a pipeline of 2 pneumatic butterfly valves is arranged between each cyclone separator and each dust removal filter.
Preferably, the dust removal filters are connected in parallel.
Furthermore, each dust removal filter is provided with a differential pressure sensor.
The utility model discloses beneficial effect as follows: 1) the device can sort a plurality of particle size section powder without a plurality of airflow classifiers, is convenient to operate and saves cost; 2) the utility model discloses the device can be used to the grading of active metal powder, and cyclic utilization gas can not cause the waste.
Drawings
Fig. 1 is a schematic structural view of a circulating supply air flow grading device according to an embodiment of the present invention;
wherein: the device comprises a rotary vibration sieve 1, a material storage tank 2, a spiral feeder 3, an airflow classifier 4, a cyclone separator 5, a dust removal filter 6, a pressure sensor 7, a pneumatic butterfly valve 8, a compressor 9, a precision filter 10, a freeze dryer 11, an automatic air supply device 12, an automatic flow control valve 13, a manual flow control valve 14, a normally open manual ball valve 15, a pneumatic stop valve 16, a back-blowing air storage tank 17, an electromagnetic valve 18, an exhaust valve 19, an ultrasonic rotary vibration sieve 20, a pressure difference sensor 21, a safety filter 22 and a safety valve 23.
Detailed Description
In order to understand the features and technical contents of the present invention in more detail, the following description is given in conjunction with the accompanying drawings, which are only used for reference and not for limiting the present invention.
Fig. 1 is a schematic structural view of a circulating air supply air flow classifying device according to an embodiment of the present invention, as shown in fig. 1, including an external blowback air storage tank 17, further including a multistage air flow classifying device, a circulating air supply device, and a circulating powder cleaning device; the multistage airflow grading equipment comprises a rotary vibration sieve 1, a material storage tank 2, a spiral feeder 3, an airflow grader 4, a cyclone separator 5 and a dust removal filter 6; the air classifier is internally provided with a pressure sensor 7, the rotary vibration sieve 1 is connected with a material storage tank 2 through a pipeline, the material storage tank 2 is connected with a spiral feeder 3 through a pipeline, a pneumatic butterfly valve 8 is arranged between the spiral feeder 3 and the air classifier 4 through a pipeline, a plurality of cyclone separators 5 are connected in parallel, the cyclone separators are respectively connected with the air classifier 4 through a pipeline provided with the pneumatic butterfly valve 8 in series, a plurality of dust removing filters 6 are connected in parallel, and two pneumatic butterfly valves 8 are arranged between each cyclone separator 5 and each dust removing filter 6 through pipelines; the circulating gas supply equipment comprises a compressor 9, a precision filter 10, a cold dryer 11 and an automatic gas supply device 12; the compressor 9 is connected with the precision filter 10 through a pipeline, the precision filter 10 is connected with the cold dryer 11 through a pipeline, a flow regulating valve is arranged between the cold dryer 11 and the automatic air supply device 12 through a pipeline, a pneumatic stop valve 16 is arranged between the cold dryer 11 and the air classifier 4 through a pipeline, and the automatic air supply device 12 is connected with the compressor 9 through a pipeline; the dust removal filter 6 with be equipped with the pipe connection of pneumatic butterfly valve 8, discharge valve 20 between the compressor 9 in proper order, with be equipped with the pipe connection of solenoid valve between the blowback gas holder 17.
Further, the multistage air flow classification device further comprises an ultrasonic rotary vibration sieve 20; the spiral feeder 3 is connected with the ultrasonic rotary vibration sieve 20 through a pipeline.
Further, the circulation gas supply apparatus further includes a safety filter 22; the safety filter 22 is arranged between the compressor 9 and the dust removing filter 6, specifically, a pipeline connection of a pneumatic butterfly valve 8, an exhaust valve 19 and a safety valve 23 is sequentially arranged between the dust removing filter 6 and the safety filter 22, and the safety filter 22 is connected with the compressor 9 through a pipeline.
Preferably, the cyclone separators 5 are connected in parallel, a pipeline of a pneumatic butterfly valve 8 is arranged between each cyclone separator 5 and the airflow classifier 4, and a pipeline of two pneumatic butterfly valves 8 is arranged between each cyclone separator 5 and each dust removal filter 6.
Here, cyclone 5 takes a plurality of parallelly connected, preferably takes three cyclone 5 to connect in parallel, every cyclone 5 is connected with air classifier 4 and dust removal filter 6 through pneumatic butterfly valve 8 respectively, when carrying out the powder classification, only open a cyclone 5 and air classifier 4 work through pneumatic butterfly valve 8, two other cyclones 5 are out of work, realize the powder classification of a granularity section, can realize the powder classification of different granularity sections in proper order through the pneumatic butterfly valve 8 that sets up, compare in the existing classifier of adopting repeatedly, cyclone series structure, only need an air classifier, sorting efficiency also obtains improving when equipment cost reduces.
Here, the apparatus of this embodiment is further provided with an ultrasonic rotary vibration sieve 20, specifically, one storage tank 2 is connected to one cyclone separator 5 through a pipeline, the storage tank 2 is connected to one spiral feeder 3 through a pipeline provided with a pneumatic butterfly valve 8, and the spiral feeder 3 is connected to the ultrasonic rotary vibration sieve 20 through a pipeline; like this when needs further accurate screening, open this pneumatic butterfly valve 8 that sets up and can make the powder enter into the ultrasonic wave and sieve the fine powder more accurately more than 300~500 meshes in shaking the sieve soon, when need not further sieve, can close this pneumatic butterfly valve 8 that sets up, make the powder store in storage tank 2.
Preferably, the dust-removing filter 6 takes two parallel connections.
Further, a differential pressure sensor 21 is provided on each dust removal filter 6.
Here, the present apparatus employs a circulation gas supply device, wherein the refrigeration dryer 11 is connected to the gas classifier 4 through a pneumatic stop valve 16, the compressor 9 is connected to the dust removing filter 6 through an exhaust valve 19 and a pneumatic butterfly valve 8, in order to further enhance the usage of circulation gas filtration protection, the safety filter 22 may be additionally disposed between the compressor 9 and the dust removing filter 6, specifically, a pipeline connection of the pneumatic butterfly valve 8, the exhaust valve 19 and a safety valve 23 is sequentially disposed between the dust removing filter 6 and the safety filter 22, and the safety filter 22 is connected to the compressor 9 through a pipeline; the circulating gas supply equipment can enable gas to circularly work through the airflow classifier 4, the cyclone separator 5, the dust removal filter 6, the safety filter 22, the compressor 9, the precision filter 10, the cold dryer 11, the airflow classifier 4 and the like, compared with the existing open-loop equipment, the waste of a large amount of disposable gas is avoided, particularly for combustible powder classification, inert gas is required, and the operation cost can be greatly saved.
The safety filter 22 is used to prevent dust which is not filtered by the dust filter from entering the compressor, and the dust entering the compressor can block the air valve of the compressor, and can cause explosion danger in serious cases. On one hand, the gas passing through the dust removal filter is filtered again, so that the purity of the compressed near-inlet gas is improved; on one hand, the filter material of the dust removal filter is prevented from falling off or being damaged, and a large amount of dust enters the compressor.
The compressor 9 pressurizes the low-pressure gas from the inlet of the compressor, and the gas is used in stages; the precision filter 10 can remove dust, water and oil from the gas at the outlet of the compressor; the cooling dryer 11 cools and cools the compressed gas from the outlet of the compressor.
Here, the circulation air supply equipment of the embodiment is provided with one automatic flow control valve 13, one normally-open hand ball valve 15, one manual flow control valve 14, the automatic flow control valve 13 is connected in series with the normally-open hand ball valve 15, and is connected in parallel with the manual flow control valve 14, the automatic flow control valve 13 is in a normally-open state, the manual flow control valve 14 is in a normally-closed state, when the automatic flow control valve 13 is damaged and fails, the normally-open hand ball valve 15 connected in series with the automatic flow control valve 13 is closed, the manual flow control valve 14 is opened, one of the two flow control valves is kept in a.
Under the condition that the pneumatic stop valve 16 is closed and the automatic flow regulating valve 13 is fully opened, the compressor 9 is started, airflow is discharged from the outlet of the compressor 9, returns to the inlet of the compressor 9 through the precision filter 10, the cold dryer 11, the normally open hand ball valve 15, the automatic flow regulating valve 13, the automatic air supply device 12, the safety valve 23 and the safety filter 22, and forms a loop, and the airflow does not enter the multistage airflow classification equipment at the moment.
When the pneumatic stop valve 16 is opened, the gas flow enters the multistage gas flow classifying device, and the opening degree of the automatic flow regulating valve 13 is regulated (reduced) at this time to control the gas amount and pressure entering the multistage gas flow classifying device.
The device adjusts the pressure balance of the device according to the pressure value fed back by the pressure sensor 7 arranged on the air classifier 4; when the feedback air pressure value is larger than the set value, the exhaust valve 19 is opened to exhaust partial air from the device so as to reduce the air pressure value of the whole device; when the feedback value is smaller than the set value, the automatic exhaust system 12 opens the air supply to increase the whole pressure value of the device, and the device keeps the dynamic balance of the air pressure in the process.
The specific working flows of the multistage air flow classification device and the circulating air supply device in the embodiment are respectively described in detail below.
The working process of the multi-stage airflow classification equipment comprises the following steps: powder enters a storage tank 2 through a rotary vibration sieve 1, the rotating speeds of a spiral feeder 3 and an airflow classifier 4 are set before reaching the spiral feeder 3, the pneumatic butterfly valve 8 and the pneumatic butterfly valves 8 on two sides of a cyclone separator 5 are opened, meanwhile, gas required by powder classification enters the airflow classifier 4, after the powder sequentially enters the spiral feeder 3 and the airflow classifier 4, the powder in the particle size section corresponding to the set rotating speed enters the corresponding cyclone separator 5 and falls and is separated from the lower opening of the cyclone separator, powder screening work in the particle size section is realized, gas can be mixed with some unseparated fine powder and enters a dust removal filter 6 through the pneumatic butterfly valve 8, some mixed fine powder can be filtered and falls and is separated from the lower opening of the dust removal filter 6, and the gas enters a circulating gas supply device; the powder screening of another particle size section is realized only by opening the pneumatic butterfly valves at two sides of another cyclone separator, setting the rotating speed of the airflow classifier and closing the pneumatic butterfly valves at two sides of the cyclone separator corresponding to the powder screening of the previous particle size section, so that the powder of the particle size section corresponding to the set rotating speed falls from the lower opening of the cyclone separator for separation, and the powder screening work of one particle size section is realized; the pneumatic butterfly valve 8 between the spiral feeder 3 and the air classifier 4 is kept in a normally open state when the powder is subjected to normal multi-stage screening, the pneumatic butterfly valve 8 can be closed when the powder is not required to be subjected to multi-stage screening, and simple powder screening work is carried out through the rotary vibration screen 1 alone at the moment; in addition, the ultrasonic rotary vibration sieve 20 is additionally arranged in the embodiment, specifically, a pipeline at the lower opening of one cyclone separator 5 is connected with one storage tank 2, the lower end of the storage tank 2 is connected with one spiral feeder 3 through a pipeline provided with a pneumatic butterfly valve 8, and the spiral feeder 3 is connected with the ultrasonic rotary vibration sieve 21 through a pipeline, so that when the powder needs to be further accurately sieved, the pneumatic butterfly valve 8 arranged is opened, the powder can enter the ultrasonic rotary vibration sieve 20 to more accurately sieve the fine powder with the particle size of more than 300-500 meshes, and when the powder does not need to be further sieved, the pneumatic butterfly valve 8 arranged can be closed, and the powder is stored in the storage tank 2.
The working process of the circulating gas supply equipment comprises the following steps: the method comprises the steps that firstly, gas is supplied through an automatic gas supply device, when powder is normally screened, a pneumatic stop valve 16 is in an open state, the gas from a dust removal filter 6 enters an airflow classifier 4 in multi-stage airflow classification equipment through a compressor 9, a precision filter 10 and a cold dryer 11 and a set pneumatic stop valve 16, the gas from the dust removal filter 6 in the multi-stage airflow classification equipment enters the compressor 9, the precision filter 10 and the cold dryer 11 through a set pneumatic butterfly valve 8 and an exhaust valve 19 to be filtered, and finally, the gas is circulated again into the airflow classifier 4 with the pneumatic stop valve 16 to carry out next cycle of circulation work; in addition, a safety filter 23 and a corresponding safety valve 23 are additionally provided in this embodiment, specifically, the dust removal filter 6 is connected to the safety filter 22 through a pneumatic butterfly valve 8, an exhaust valve 20 and a safety valve 23, the safety filter 22 is connected to the compressor 9 through a pipeline, so that the gas after coming out of the dust removal filter 6 firstly enters the safety filter 22 for filtering, then enters the compressor 9, a precision filter 10 and a freeze dryer 11 for further filtering, and finally circulates again into the air classifier 4 provided with a pneumatic stop valve 16 for the next cycle.
The pneumatic shut-off valve 16 arranged between the air dryer 11 and the air classifier 4 works in particular: when the device is used, the first circulating air supply work of the circulating air supply equipment is needed, the pneumatic stop valve 16 is in a closed state at the moment, and when the powder is normally screened, the pneumatic stop valve 16 is kept in a normally open state.
The pneumatic butterfly valves 8 arranged on both sides of the cyclone separator 5 work in detail: this embodiment has set up such equipment subassembly of three groups, and the powder is sieved the during operation, and the pneumatic butterfly valve 8 of only using a set of cyclone 5 and both sides in same time quantum, and the pneumatic butterfly valve of only a set of cyclone both sides is the open mode in same time quantum promptly, and remaining two sets of pneumatic butterfly valve are in the closed mode.
The pneumatic butterfly valve 8, arranged between the screw feeder 3 and the air classifier 4, works in particular: when the multistage airflow classification equipment normally works, the pneumatic butterfly valve 8 is in a normally open state.
The pneumatic butterfly valve 8 arranged between the cyclone 5 and the dust filter 6 works in particular: opening the pneumatic butterfly valve 8 means that the gas enters the corresponding dust removal filter 6, and two dust removal filters 6 connected in parallel are provided in the embodiment, so that one of the pneumatic butterfly valves 8 or both of the pneumatic butterfly valves 8 can be opened according to the requirement of the powder screening workload.
The pneumatic butterfly valve 8, arranged between the dust removal filter 6 and the safety filter 22, works in particular: the opening of the pneumatic butterfly valve 8 means that gas can enter the safety filter 22 through the exhaust valve 19 and the safety valve 24, and two dust removal filters 6 which are connected in parallel are arranged in the embodiment, and the pneumatic butterfly valve 8 is in a normally open state.
The exhaust valve 19 arranged between the dust filter 6 and the safety filter 22 works in particular: when the powder is normally screened and circularly cleaned, the powder is in a normally closed state, and when the feedback air pressure value of the pressure sensor 7 is greater than a set value, the exhaust valve 19 opens and exhausts partial gas so as to reduce the pressure value of the whole device.
The safety valve 23 provided between the dust removal filter 6 and the safety filter 22 works in particular: the safety valve is kept in a normally closed state, when the gas flow and the pressure in the device are abnormal and are higher than the set pressure value, and the exhaust valve 19 is not in time to exhaust the pressure, the safety valve 23 is opened to release the pressure, so that the pressure in the whole device is ensured to be within the range of the set pressure allowable value.
The flow control valve arranged between the cold dryer 11 and the automatic air supply device 12 works specifically: this embodiment has set up an automatic flow control valve 13, a hand ball valve 15 that normally opens, a manual flow control valve 14, automatic flow control valve 13 and the hand ball valve 15 that normally opens establish ties, and parallelly connected with manual flow control valve 14, automatic flow control valve 13 is in normally open state, manual flow control valve 14 is in normally closed state, when automatic flow control valve 13 damages failure, close the hand ball valve 15 that normally opens who establishes ties with automatic flow control valve 13, open manual flow control valve 14, one keeps normally open state among the two flow control valves of realization.
Under the condition that the pneumatic stop valve 16 is closed and the automatic flow regulating valve 13 is fully opened, the compressor 9 is started, airflow is discharged from the outlet of the compressor 9, returns to the inlet of the compressor 9 through the precision filter 10, the cold dryer 11, the normally open hand ball valve 15, the automatic flow regulating valve 13, the automatic air supply device 12, the safety valve 23 and the safety filter 22, and forms a loop, and the airflow does not enter the multistage airflow classification equipment at the moment.
When the pneumatic stop valve 16 is opened, the gas flow enters the multistage gas flow classifying device, and the opening degree of the automatic flow regulating valve 13 is regulated (reduced) at this time to control the gas amount and pressure entering the multistage gas flow classifying device.
The utility model discloses the device that involves in the device, spare part all is the existing equipment on the market, the sieve that shakes soon in this embodiment is KLD1000-1S type, the storage tank is DN500 type, the screw feeder is 50-2S type double helix screw feeder, the air classifier is KW-F300 type, cyclone is DN300 type, dust removal filter is DN800 type, the sieve that shakes soon of ultrasonic wave is KLD1000-3S type, safety filter is DN400 type, the compressor is LU-55W-8T type, precision filter is JG-36-50 type, the refrigeration dryer is JL-150WT type, the automatic air supply device is ZAZP type, the blowback gas holder is phi 219 the cylinder jar body, differential pressure sensor is HCCY100 type, pressure sensor is SMC-PSE532-M5 type.
The existing common pneumatic butterfly valve, the exhaust valve, the automatic flow regulating valve, the electromagnetic valve, the differential pressure sensor, the pressure sensor and the automatic air supply device are all connected with a common PLC controller in the field on the market, the connection mode is also conventional, specifically, the PLC controller selected in the embodiment is an ohm dragon CP1H-M40DR, and the pneumatic butterfly valve is connected with a switching value input point and an output point of the PLC through an electromagnetic two-position five-way valve;
the exhaust valve is connected with the switching value input and output points of the PLC through the electromagnetic two-position five-way valve;
the automatic flow regulating valve is connected with analog quantity input and output points of the PLC;
the electromagnetic valve is connected with the switching value input and output points of the PLC through the electromagnetic two-position five-way valve;
the differential pressure sensor and the pressure sensor are respectively connected with an analog quantity input point of the PLC;
a controller in the automatic air supply device is connected with analog quantity input and output points of the PLC;
it should be noted that the connection relationship between each component and the PLC controller in the present device is a conventional connection manner, and is not a part to be protected by the present invention, and should be known to those skilled in the art.
The embodiment of the utility model provides a circulation air feed air current grading plant concrete work flow as follows:
powder enters a storage tank through a rotary vibration sieve, the rotating speeds of a spiral feeder and an airflow classifier are set before the powder reaches the spiral feeder, the pneumatic butterfly valves and the pneumatic butterfly valves on two sides of a cyclone separator are opened, meanwhile, gas required by powder classification enters the airflow classifier, the powder sequentially enters the spiral feeder and the airflow classifier, the powder in the particle size section corresponding to the set rotating speed enters the corresponding cyclone separator and falls and is separated from the lower opening of the cyclone separator, powder screening work of a particle size section is realized, gas can be mixed with some unseparated fine powder and enters a dust removal filter through the arranged pneumatic butterfly valves, some mixed fine powder can be filtered and falls and is separated from the lower opening of the dust removal filter, and the gas enters a circulating gas supply device; the powder screening of another particle size section is realized only by opening the pneumatic butterfly valves at two sides of another cyclone separator, setting the rotating speed of the airflow classifier and closing the pneumatic butterfly valves at two sides of the cyclone separator corresponding to the powder screening of the previous particle size section, so that the powder of the particle size section corresponding to the set rotating speed falls from the lower opening of the cyclone separator for separation, and the powder screening work of one particle size section is realized; the pneumatic butterfly valve between the spiral feeder and the airflow classifier is kept in a normally open state when powder is subjected to normal multi-stage screening, the pneumatic butterfly valve can be closed when the powder is not required to be subjected to multi-stage screening, and simple powder screening work is carried out through the rotary vibration screen at the moment; in addition, the ultrasonic rotary vibration sieve is additionally arranged in the embodiment, specifically, a pipeline at the lower opening of one cyclone separator is connected with a storage tank, the lower end of the storage tank is connected with a spiral feeder through a pipeline provided with a pneumatic butterfly valve, the spiral feeder is connected with the ultrasonic rotary vibration sieve through a pipeline, so that when the powder needs to be further accurately sieved, the set pneumatic butterfly valve is opened to enable the powder to enter the ultrasonic rotary vibration sieve to more accurately sieve the fine powder with the granularity of more than 300-500 meshes, and when the powder does not need to be further sieved, the set pneumatic butterfly valve can be closed to enable the powder to be stored in the storage tank.
The gas enters the circulating gas supply equipment, specifically, the gas passes through a pneumatic butterfly valve, an exhaust valve and a safety valve arranged on a dust removal filter, enters the safety filter for primary gas filtration, then enters the compressor, the precision filter and the cold dryer for further filtration, and then enters the airflow classifier again through a pneumatic stop valve arranged on the airflow classifier for powder screening;
after long-time work, a large amount of residual powder is accumulated in the dust removing filter, so that the internal pressure difference of the dust removing filter is increased, the pressure difference signal can be detected by a pressure difference sensor arranged in the dust removing filter, gas can enter the corresponding dust removing filter through an externally-connected back blowing gas storage tank to perform fine powder blockage cleaning work, and the cleaned powder is moved out through the bottom of the dust removing filter; the opening and closing of the electromagnetic valve between the back-blowing air storage tank and the dust removal filter can enable one or more dust removal filters to carry out powder cleaning work, and the rest dust removal filters still normally participate in powder sorting work.
The specific type of the above-mentioned devices is not limited and detailed, and the deep connection mode of the above-mentioned devices is not detailed, and can be understood by those skilled in the art as the common general knowledge.
The embodiment of the present invention is only to introduce the specific implementation manner, and is not limited to the protection scope. The present invention is not limited to the above embodiments, but can be modified in various ways without departing from the scope of the present invention.
Claims (6)
1. A circulating air supply air flow grading device comprises an external back-blowing air storage tank, and is characterized by also comprising a multi-stage air flow grading device and a circulating air supply device; the multistage airflow grading equipment comprises a rotary vibration sieve, a storage tank, a spiral feeder, an airflow grader, a cyclone separator and a dust removal filter; the cyclone separators are connected in parallel, and are connected in series with the air classifier respectively through pipelines provided with pneumatic butterfly valves, the dust removing filters are connected in parallel, and each cyclone separator is connected with each dust removing filter through a pipeline provided with two pneumatic butterfly valves; the circulating gas supply equipment comprises a compressor, a precision filter, a cold dryer and an automatic gas supplementing device; the compressor is connected with the precision filter through a pipeline, the precision filter is connected with the cold dryer through a pipeline, a flow regulating valve is arranged between the cold dryer and the automatic air supply device through a pipeline, a pneumatic stop valve is arranged between the cold dryer and the airflow classifier through a pipeline, and the automatic air supply device is connected with the compressor through a pipeline; the dust removal filter with be equipped with the pipe connection of pneumatic butterfly valve, discharge valve between the compressor in proper order, with be equipped with the pipe connection of solenoid valve between the blowback gas holder.
2. The recycled feed air stream classifying device according to claim 1, wherein the multistage air stream classifying apparatus further comprises an ultrasonic rotary vibrating screen; the spiral feeder is connected with the ultrasonic rotary vibration sieve through a pipeline.
3. The recirculated air supply air flow staged device of claim 1, wherein the recirculated air supply equipment further includes a safety filter; the safety filter is arranged between the compressor and the dust removal filter, specifically, a pipeline connection of a pneumatic butterfly valve, an exhaust valve and a safety valve is sequentially arranged between the dust removal filter and the safety filter, and the safety filter is connected with the compressor pipeline.
4. The air classifier as claimed in claim 1, wherein said cyclone separator is connected in parallel in three stages, each of said cyclone separator is connected to said air classifier by a pneumatic butterfly valve, and each of said cyclone separator is connected to each of said dust filters by 2 pneumatic butterfly valves.
5. A recirculated supply air flow staged device as recited in claim 1, and further wherein the dust removal filter is in two parallel arrangements.
6. A recirculated supply air flow classifier as claimed in claim 1, wherein a differential pressure sensor is provided in each of the dust filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922209919.2U CN211412758U (en) | 2019-12-11 | 2019-12-11 | Circulating air supply airflow grading device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922209919.2U CN211412758U (en) | 2019-12-11 | 2019-12-11 | Circulating air supply airflow grading device |
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| CN211412758U true CN211412758U (en) | 2020-09-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718272A (en) * | 2020-12-30 | 2021-04-30 | 江苏科创金属新材料有限公司 | Zinc powder grading system device |
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2019
- 2019-12-11 CN CN201922209919.2U patent/CN211412758U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112718272A (en) * | 2020-12-30 | 2021-04-30 | 江苏科创金属新材料有限公司 | Zinc powder grading system device |
| CN112718272B (en) * | 2020-12-30 | 2023-09-19 | 江苏科创金属新材料有限公司 | Grading system device of zinc powder |
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