阅读说明：本技术 一种废弃pe材料的运输装置 (Conveyer of abandonment PE material ) 是由 程素芹 姜家治 姜曙光 于 2020-12-03 设计创作，主要内容包括：本发明提供一种废弃PE材料的运输装置,用于运输破碎后的PE材料,包括水箱、过滤塔、循环泵、送料机构、清洗机构、出料机构,粉尘过渡箱、吸尘机构、粉尘检测器和控制器。在运输装置的粉尘过渡箱中设置了吸尘机构,利用负压泵产生负压,使得外部空气流入集尘仓内并通过过滤网过滤后,将粉尘收集在集尘仓内。同时,利用控制器配合传感器和检测器,对皮带运输中清洗完成下落的废弃PE材料灰尘进行检测和控制,并且控制灰尘下落收集装置的阀门开合对集聚的灰尘进行收集。当灰尘浓度超限时控制器控制报警器报警,同时启动负压泵进行除尘作业,从而能够进行自动除尘,避免车间内的粉尘浓度过高。(The invention provides a waste PE material conveying device, which is used for conveying crushed PE materials and comprises a water tank, a filter tower, a circulating pump, a feeding mechanism, a cleaning mechanism, a discharging mechanism, a dust transition box, a dust collection mechanism, a dust detector and a controller. The dust collection mechanism is arranged in the dust transition box of the conveying device, and negative pressure is generated by the negative pressure pump, so that external air flows into the dust collection bin and is filtered by the filter screen, and dust is collected in the dust collection bin. Meanwhile, the controller is matched with the sensor and the detector to detect and control the waste PE material dust which is cleaned and falls in the belt transportation, and a valve of the dust falling and collecting device is controlled to be opened and closed to collect the accumulated dust. When the dust concentration exceeds the limit, the controller controls the alarm to alarm, and simultaneously the negative pressure pump is started to remove dust, so that automatic dust removal can be performed, and the dust concentration in a workshop is prevented from being too high.)

1. A waste PE material transportation apparatus for transporting crushed cleaned PE material, comprising:

a water tank (2);

a filtration tower (3);

a circulation pump (40); a water inlet pipe of the circulating pump (40) is inserted in the water tank (2), and a water outlet pipe of the circulating pump is connected to the filter tower (3);

characterized in that, the conveyer still includes:

the feeding mechanism (20) comprises a conveying shaft (201) and a feeding conveyor belt (202), the conveying shaft (201) drives the feeding conveyor belt (202) to move through power, the waste PE materials to be washed are located on the feeding conveyor belt (202), the feeding device (20) is arranged on the water tank (2) in a penetrating mode, and a feeding end and a discharging end of the feeding device (20) are located outside the water tank (2) respectively;

the cleaning mechanism comprises a spray pipe (210) and a spray head (21), the spray head (21) is arranged in the water tank (2), and the spray head (21) is positioned above the feeding conveyor belt (202); one end of the spray pipe (210) is connected with the water outlet of the filter tower (3), and the other end is connected with the spray head (21);

the discharging and conveying mechanism comprises a discharging pipeline (31) and a conveying channel (30), the discharging pipeline (31) is erected below an outlet of the feeding conveyor belt (202), and the conveying channel (30) comprises an L-shaped support (301), two supports (302) and a conveying mesh belt (303); the vertical section of the L-shaped support (301) is fixed below the water tank (2), the two supports (302) are fixed on the end surface of the transverse section of the L-shaped support (301), and the supports (302) support the conveying mesh belt (303); one end of the conveying mesh belt (303) is positioned below the blanking pipeline (31);

the dust transition box (4) is fixed on the outer wall of the vertical section of the L-shaped support (301) and is communicated with one side of the discharging and conveying mechanism through a communication port (33);

a dust suction mechanism (5) which comprises a dust suction port (50), a negative pressure pump (51), a dust collection bin (56) and a plurality of adsorption devices (9); an air inlet of the dust suction port (50) is communicated in the dust transition box (4), and the negative pressure pump (51) is positioned outside the dust transition box (4) and connected with an air outlet of the dust suction port (50); one end of the dust collection bin (56) is connected with an air outlet of the negative pressure pump (51), external air enters from one end of the dust collection bin (56) and flows out from an opening (55) at the other end of the dust collection bin (56), the interior of the dust collection bin (56) is sequentially divided into a plurality of compartments through a plurality of filter screens (6) along the gas outflow direction, and the diameter of the mesh of each filter screen (6) is sequentially reduced along the gas outflow direction; a plurality of adsorption devices (9) respectively corresponding to the plurality of compartments, and each adsorption device (9) is arranged in the corresponding compartment; each adsorption device (9) comprises: the device comprises a tension sensor (904), a rod body (901), a blade (903) and a vibration motor (905); one end of the tension sensor (904) is fixedly connected with the top wall of the dust collection bin (56); one end of the rod body (901) is connected with the other end of the tension sensor (904); the blade (903) is arranged on the rod body (901); the vibration motor (905) is arranged on the rod body (901) and is used for providing vibration; the tension sensor (904) detects the total weight of the rod body (901), the vibration motor (905), the blade (903) and dust attached to the blade (903);

a dust detector (41) which is arranged inside the dust transition box (4) and is used for detecting the dust concentration in the air;

the controller is arranged on the dust transition box (4) and is connected with an alarm (42); the controller drives an alarm (42) to give an alarm when the total weight exceeds a preset weight according to the total weight detected by the tension sensor (504); the controller drives an alarm (42) to alarm and simultaneously starts a negative pressure pump (51) when the dust concentration exceeds a preset concentration according to the dust concentration detected by the dust detector (41).

2. A PE waste material transporter as claimed in claim 1, wherein the dust collector (5) further comprises a cleaning mechanism including a plurality of cleaning brushes (8) respectively corresponding to the plurality of filter screens (6), each cleaning brush (8) being movably connected to the top wall of the dust collecting chamber (56) by a hydraulic rod (7); each cleaning brush (8) cleans the corresponding filter screen (6) when the hydraulic rod (7) is lifted.

3. A waste PE material transporting device as claimed in claim 1, characterised in that the suction means (5) further comprises a plurality of sensors one (52), a plurality of electronic valves (54) and a plurality of cloth bags (53); a plurality of first sensors (52) correspond to the plurality of compartments respectively, each first sensor (52) is arranged on the bottom wall of the corresponding compartment, and each first sensor (52) is used for detecting a first pressure value generated by accumulated dust in the corresponding compartment; a plurality of electronic valves (54) respectively corresponding to the plurality of compartments, each electronic valve (54) being arranged at the bottom of a compartment; the cloth bags (53) correspond to the compartments respectively, each cloth bag (53) corresponds to one electronic valve (54), and each cloth bag (53) is communicated with the corresponding compartment through the corresponding electronic valve (54); the controller opens the electronic valve (54) according to the detected pressure value I of each pressure sensor I (52) when any one of the pressure values exceeds a preset pressure value, so that dust in the compartment enters the cloth bag (53).

4. A waste PE material transporter as claimed in claim 1, wherein the fixed end of the hydraulic rod (7) is suspended and fixed on the outer wall of the water tank (1).

5. A waste PE material transporter as claimed in claim 1, wherein the blades (903) are inclined and the blades (903) are fixedly connected to the rod (901) at the top in the direction in which the blades (903) are inclined downward.

6. The waste PE material transportation device as claimed in claim 1, wherein a telescopic pipe (902) is sleeved outside the tension sensor (904), and both ends of the telescopic pipe (902) are respectively connected with the top wall of the dust collection bin (56) and one end of the rod body (901).

7. A waste PE material transporter as claimed in claim 1, further comprising a feed hopper (1) for feeding the waste PE material to be cleaned onto a feed conveyor (202).

8. A PE waste material transporter as claimed in claim 1, wherein the circulating pump (40) is provided in plurality and connected in parallel.

9. A waste PE material transporter as claimed in claim 1, wherein a control valve (401) is provided between the inlet and outlet pipes of the circulating pump (40).

Technical Field

The invention belongs to the technical field of waste material recovery equipment, and particularly relates to a waste PE material conveying device.

Background

The plastic is a high molecular compound obtained by polymerizing monomers as raw materials through addition polymerization or polycondensation reaction, can freely change components and form, and comprises synthetic resin, fillers, plasticizers, stabilizers, lubricants, pigments and other additives. Present waste plastic need carry out belt transport after the breakage, but waste plastic contains a large amount of earth and dust at the process that the secondary was collected basically, and it is after the breakage, and dust and waste plastic granule fuse together, and the transportation can produce the raise dust, reaches certain numerical value when the raise dust concentration after, can influence the gear operation of haulage equipment, and long-term collection dirt can reduce mechanical life, so need a mechanism cooperation haulage equipment that comes the timing clear dust according to the raise dust concentration and moves together.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a waste PE material transportation device.

In order to achieve the purpose, the invention provides the following technical scheme:

a waste PE material transport device for transporting shredded PE material, comprising:

a water tank;

a filtration tower;

a circulation pump; the water inlet pipe of the circulating pump is inserted in the water tank, and the water outlet pipe of the circulating pump is connected to the filter tower;

the transportation device further comprises:

the feeding mechanism comprises a conveying shaft and a feeding conveyor belt, the conveying shaft drives the feeding conveyor belt to move through power, and the waste PE material to be washed is positioned on the feeding conveyor belt, wherein the feeding device is arranged in the water tank in a penetrating mode, and the feeding end and the discharging end of the feeding device are respectively positioned outside the water tank;

the cleaning mechanism comprises a spray pipe and a spray head, the spray head is arranged in the water tank, and the spray head is positioned above the feeding conveyor belt; one end of the spray pipe is connected with the water outlet of the filter tower, and the other end of the spray pipe is connected with the spray head;

the discharging and conveying mechanism comprises a discharging pipeline and a conveying channel, the discharging pipeline is erected below an outlet of the feeding conveyor belt, and the conveying channel comprises an L-shaped support, two supports and a conveying mesh belt; the vertical section of the L-shaped support is fixed below the water tank, the two supports are fixed on the end surface of the transverse section of the L-shaped support, and the supports support the conveying mesh belt; one end of the conveying mesh belt is positioned below the blanking pipeline;

the dust transition box is fixed on the outer wall of the vertical section of the L-shaped support and is communicated with one side of the discharging and conveying mechanism through a communication port;

the dust collection mechanism comprises a dust collection port, a negative pressure pump, a dust collection bin and a plurality of adsorption devices; the air inlet of the dust collection port is communicated with the dust transition box, and the negative pressure pump is positioned outside the dust transition box and connected with the air outlet of the dust collection port; one end of the dust collection bin is connected with an air outlet of the negative pressure pump, external air enters from one end of the dust collection bin and flows out from an opening at the other end of the dust collection bin, the dust collection bin is sequentially divided into a plurality of compartments through a plurality of filter screens along the gas outflow direction, and the diameter of the mesh of each filter screen is sequentially reduced along the gas outflow direction; a plurality of adsorption devices which respectively correspond to the plurality of compartments, and each adsorption device is arranged in the corresponding compartment; each adsorption device comprises: the device comprises a tension sensor, a rod body, a blade and a vibration motor; one end of the tension sensor is fixedly connected with the top wall of the dust collection bin; one end of the rod body is connected with the other end of the tension sensor; the blades are arranged on the rod body; the vibration motor is arranged on the rod body and is used for providing vibration; the tension sensor detects the total weight of the rod body, the vibration motor, the blade and dust attached to the blade;

the dust detector is arranged inside the dust transition box and is used for detecting the dust concentration in the air;

the controller is arranged on the dust transition box and is connected with an alarm; the controller drives the alarm to give an alarm when the total weight exceeds a preset weight according to the total weight detected by the tension sensor; the controller is according to the dust concentration that dust detector detected when dust concentration surpassed a predetermined concentration, the controller drive alarm was reported to the police, starts the negative pressure pump simultaneously.

Furthermore, the dust collection mechanism also comprises a cleaning mechanism which comprises a plurality of cleaning brushes respectively corresponding to the plurality of filter screens, and each cleaning brush is movably connected with the top wall of the dust collection bin through a hydraulic rod; each cleaning brush cleans the corresponding filter screen when the hydraulic rod is lifted.

Furthermore, the dust collection mechanism also comprises a plurality of first sensors, a plurality of electronic valves and a plurality of cloth bags; the first sensors correspond to the compartments respectively, each first sensor is arranged on the bottom wall of the corresponding compartment, and each first sensor is used for detecting a first pressure value generated by accumulated dust in the corresponding compartment; the electronic valves correspond to the compartments respectively, and each electronic valve is arranged at the bottom of each compartment; the plurality of cloth bags correspond to the plurality of compartments respectively, each cloth bag corresponds to one electronic valve respectively, and each cloth bag is communicated with the corresponding compartment through the corresponding electronic valve; when any one of the pressure values exceeds a preset pressure value, the controller opens the electronic valve to enable dust in the compartment to enter the cloth bag.

Furthermore, the fixed end of the hydraulic rod is fixed on the outer wall of the water tank in a hanging manner.

Furthermore, the blade is the slope form, and the blade is along the top fixed connection body of rod of the direction of blade downward sloping.

Furthermore, a telescopic pipe is sleeved outside the tension sensor, and two ends of the telescopic pipe are respectively connected with the top wall of the dust collection bin and one end of the rod body.

Further, the apparatus for transporting waste PE material further comprises a feed hopper for feeding the waste PE material to be cleaned onto a feeding conveyor.

Further, the circulating pump is provided with a plurality of circulating pumps which are connected in parallel.

Furthermore, a control valve is arranged between the water inlet pipe and the water outlet pipe of the circulating pump.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the dust collection mechanism is arranged in the dust transition box of the cleaned waste PE material conveying device, negative pressure is generated by the negative pressure pump, so that external air flows into the dust collection bin and is filtered by the filter screen, and then the dust is collected in the dust collection bin. Meanwhile, the controller is matched with the sensor and the detector to detect and control the fallen waste PE material dust in the belt transportation, and the valve of the dust falling and collecting device is controlled to be opened and closed to collect the collected dust. When the dust concentration exceeds the limit, the controller controls the alarm to alarm, and simultaneously the negative pressure pump is started to remove dust, so that automatic dust removal can be realized, and the phenomenon that the dust concentration in a workshop is too high due to negligence of workers is avoided.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the dust suction mechanism of the present invention;

FIG. 3 is a schematic view of the structure of the adsorption apparatus of the present invention;

fig. 4 is a schematic diagram of the structure of the circulation pump of the present invention.

The figure is marked with: 1-a feed hopper, 2-a water tank, 3-a filter tower, 20-a feeding mechanism, 201-a conveying shaft, 202-a feeding conveyor belt, 21-a spray head, 210-a spray pipe, 30-a material conveying channel, 31-a blanking pipeline, 33-a communicating port, 301-an L-shaped support, 302-a support, 303-a conveying mesh belt, 40-a circulating pump, 401-a control valve, 4-a dust transition box, 5-a dust suction mechanism, 6-a filter screen, 7-a hydraulic rod, 8-a cleaning brush, 9-an adsorption device, 41-a dust detector, 42-an alarm, 50-a dust suction port, 51-a negative pressure pump, 52-a sensor I, 53-a cloth bag, 54-an electronic valve, 55-an opening and 56-a dust collection bin, 901-rod body, 902-telescopic pipe, 903-blade, 904-tension sensor, 905-vibration motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the transportation device for waste PE material of this embodiment is used for transporting crushed and cleaned PE material and performing dust removal, and includes a water tank 2, a filter tower 3, a circulation pump 40, a feeding mechanism 20, a cleaning mechanism, a discharging mechanism, a dust transition box 4, a dust suction mechanism 5, a dust detector 41, and a controller.

The water tank 2 is a container for collecting water or cleaning agent for cleaning the waste PE material in this embodiment, and may be a closed water tank or an open-top water tank, and is made of enamel or steel.

The filter tower 3 is a collection container having functions of collection, filtration, cooling, and the like, and is placed above the water tank 2.

The feeding mechanism 20 comprises a transmission shaft 201 and a feeding conveyor belt 202, the transmission shaft 201 drives the feeding conveyor belt 202 to move through power, the ABS waste materials to be washed are located on the feeding conveyor belt 202, the feeding device 20 penetrates through the water tank 2, and a feeding end and a discharging end of the feeding device 20 are located outside the water tank 2 respectively. Thus realizing the independence of the feeding mechanism 20 and the water tank 2; when the water tank 2 is open at the upper end, the material conveying can be completed outside the water tank 2, and the closed water tank 2 can also be operated as long as the cleaning link is in the water tank 2.

The cleaning mechanism comprises a spray pipe 210 and a spray head 21, the spray head 21 is arranged in the water tank 2, and the spray head 21 is positioned above the feeding conveyor belt 202; one end of the spray pipe 210 is connected to the water outlet of the filter tower 3, and the other end thereof is connected to the spray header 21. The spray header 21 may be located at the upper part of the open type water tank 2, or may be located inside the closed type water tank 2 as long as it sprays the waste to be cleaned on the feeding conveyor belt 202. The spray header 21 preferably adopts a centrifugal atomization water mist spray head which has high water pressure, fine water mist and good cleaning effect.

With continued reference to fig. 1-4, the water inlet pipe of the circulating pump 40 is inserted into the water tank 2, and the water outlet pipe is connected to the filter tower 3; a control valve 401 is arranged between the water inlet pipe and the water outlet pipe; the circulating pump 40 can be a plurality of parallelly connected, and when a set of pump damaged, another group pump can replace the use like this, also can alternate at ordinary times with opening, extension water pump life. When the cleaning machine works, the circulating pump 40 sucks cleaning water or cleaning agent into the filter tower 3 from the water tank 2, and then the cleaning water or the cleaning agent is sent into the spray header 21 through the spray pipe 210 through the filter tower 3 for cleaning; the cleaned water or cleaning agent falls into the water tank 2 and is filtered by the filter tower 3 for repeated recycling.

The waste PE material transport apparatus further comprises a feed hopper 1 for feeding the waste PE material to be cleaned onto a feed conveyor 202.

The discharging mechanism comprises a discharging pipeline 31 and a conveying channel 30, the discharging pipeline 31 is erected below an outlet of the feeding conveyor belt 202, and the conveying channel 30 comprises an L-shaped support 301, two supports 302 and a conveying mesh belt 303; the vertical section of the L-shaped support 301 is fixed below the water tank 2, the two supports 302 are fixed on the end surface of the transverse section of the L-shaped support 301, and the supports 302 support the conveying mesh belt 303; one end of the conveying mesh belt 303 is positioned below the blanking pipe 31.

The discharging mechanism transits the cleaned waste materials from the falling in the vertical direction to the transportation in the horizontal direction, the cleaned materials are conveyed to the next procedure in time, the process efficiency is greatly improved, the dust flying condition still exists in the falling process of the cleaned and discharged waste materials, and the dust collection mechanism 5 is required to be arranged to remove dust in the whole workshop.

The dust transition box 4 is fixed on the outer wall of the vertical section of the L-shaped support 301 and is communicated with one side of the discharging and transporting mechanism through a communicating port 33.

The dust suction mechanism 5 comprises a dust suction port 50, a negative pressure pump 51, a dust collection bin 56 and a plurality of adsorption devices 9; an air inlet of the dust suction port 50 is communicated in the dust transition box 4, and the negative pressure pump 51 is positioned outside the dust transition box 4 and is connected with an air outlet of the dust suction port 50; one end of the dust collection bin 56 is connected with the air outlet of the negative pressure pump 51, external air enters from one end of the dust collection bin 56 and flows out from an opening 55 at the other end of the dust collection bin 56, the interior of the dust collection bin 56 is sequentially divided into a plurality of compartments through a plurality of filter screens 6 along the gas outflow direction, and the diameter of the mesh of each filter screen 6 is sequentially reduced along the gas outflow direction; a plurality of adsorption devices 9 respectively corresponding to the plurality of compartments, and each adsorption device 9 is arranged in the corresponding compartment; each adsorption device 9 includes: a tension sensor 904, a rod body 901, a blade 903 and a vibration motor 905; one end of the tension sensor 904 is fixedly connected with the top wall of the dust collection bin 56; one end of the rod body 901 is connected with the other end of the tension sensor 904; blades 903 are arranged on the rod body 901; a vibration motor 905 is disposed on the rod 901 and configured to provide vibration; the tension sensor 904 detects the total weight of the rod 901, the vibration motor 905, the blade 903, and the dust attached to the blade 903.

The dust collection mechanism 5 also comprises a cleaning mechanism which comprises a plurality of cleaning brushes 8 respectively corresponding to the plurality of filter screens 6, and each cleaning brush 8 is movably connected with the top wall of the dust collection bin 56 through a hydraulic rod 7; the other end of the hydraulic rod 7 is fixed on the outer wall of the water tank 2 in a hanging manner, and each cleaning brush 8 cleans the corresponding filter screen 6 when the hydraulic rod 7 moves up and down.

During specific work, the hydraulic rod 7 can go up and down to move through being connected with an oil pump, and the cleaning brush 8 of hydraulic rod 7 one end rubs on corresponding filter screen 6 to utilize cleaning brush 8 to clean corresponding filter screen 6, thereby keep filter screen 6's filtration efficiency, also prolonged filter screen 6's life.

The dust collection mechanism 5 also comprises a plurality of first sensors 52, a plurality of electronic valves 54 and a plurality of cloth bags 53; the first sensors 52 correspond to the compartments respectively, each first sensor 52 is arranged on the bottom wall of the corresponding compartment, and each first sensor 52 is used for detecting a first pressure value generated by accumulated dust in the corresponding compartment; a plurality of electronic valves 54 respectively correspond to the plurality of compartments, each electronic valve 54 being arranged at the bottom of a compartment; the cloth bags 53 correspond to the compartments respectively, each cloth bag 53 corresponds to one electronic valve 54 respectively, and each cloth bag 53 is communicated with the corresponding compartment through the corresponding electronic valve 54; wherein, the controller opens the electronic valve 54 according to the detected pressure value one of each pressure sensor 52 when any one of the pressure values exceeds a preset pressure value, so that the dust in the compartment enters the cloth bag 53.

The dust detector 41 is disposed inside the dust transition box 4 and detects the dust concentration in the air.

The controller is arranged on the dust transition box 4 and is connected with an alarm 42; the controller drives the alarm 42 to give an alarm when the total weight exceeds a preset weight according to the total weight detected by the tension sensor 504; the controller drives the alarm 42 to alarm and simultaneously starts the negative pressure pump 51 when the dust concentration exceeds a preset concentration according to the dust concentration detected by the dust detector 41.

During specific work, the dust detector 41 analyzes and sends detection data to the controller according to the dust concentration in the dust collection bin 56, the controller controls the opening of the negative pressure pump 51 according to preset dust concentration data, and meanwhile, the controller sends an alarm control signal to the alarm 42 to give an alarm when the dust concentration exceeds the preset value according to the preset dust concentration alarm value, so that the alarm is given out, the dust concentration is prevented from being too high, and a worker cannot perceive continuous work. The bottom of the dust collection bin 56 is provided with a cloth bag 53, the cloth bag 53 is communicated with the dust collection bin 56 in a control mode through an electronic valve 54, when a certain amount of dust is collected in the dust collection bin 56, a pressure value is transmitted to the controller by the first pressure sensor 52, the controller opens the electronic valve 54 according to the detected pressure value I of each first pressure sensor 52, when any one of the pressure values exceeds a preset pressure value, the dust in the separation bin enters the cloth bag 53, and the dust collection is completed.

In summary, the dust collection mechanism is arranged in the collection box of the transportation device, the negative pressure pump is used for generating negative pressure, external air flows into the dust collection bin and is filtered by the filter screen, dust is collected in the dust collection bin, and the dust collection device can collect the dust in a segmented manner by arranging the plurality of separation bins and the plurality of filter screens, so that the treatment efficiency is increased, the blocking of the filter screens is reduced, and the service life of the filter screens is prolonged. Meanwhile, the controller is matched with the sensor and the detector to detect and control the fallen waste PE material dust in the belt transportation, and the valve of the dust falling and collecting device is controlled to be opened and closed to collect the collected dust. When the dust concentration exceeds the limit, the controller controls the alarm to alarm, and simultaneously the negative pressure pump is started to remove dust, so that automatic dust removal can be realized, and the phenomenon that the dust concentration in a workshop is too high due to negligence of workers is avoided.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.