A safety explosion-proof dust removal system for high-speed grinding processes

Abstract

The present invention discloses a safety explosion-proof dust removal system for high-speed grinding processes, which includes a dust absorption device, an explosion-proof device, a cyclone dust removal device, a fan unit, a bag filter dust removal device, a dust recovery and conveying device, a dust briquetting device and an electric control unit. The dust absorption device includes a gas collection hood and a first pipeline. The gas collection hood is arranged at the inlet end of the first pipeline, and the outlet end of the first pipeline is connected to the inlet end of the cyclone dust removal device through the explosion-proof device. The outlet end of the cyclone dust removal device is connected and communicated with the inlet end of the fan unit, and the outlet end of the fan unit is connected and communicated with the inlet port of the bag filter dust removal device. The discharge ports at the bottoms of the cyclone dust removal device and the bag filter dust removal device are connected to the dust briquetting device through the dust recovery and conveying device and a gravity ash discharge valve, and the bottom of the dust briquetting device has a discharge port. The present invention adopts a two-stage dust removal design, with high dust collection efficiency, fast sedimentation speed, good safety performance, high overall automation degree, low labor cost, and recyclability.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding processing, and particularly relates to a safety explosion-proof dust removal system for high-speed grinding processes. Background Art

[0002] The suspended tiny solid particles generated during high-speed grinding are called dust. Since grinding processing is often carried out inside grinding CNC machines or enclosed spaces, workers must wear dust removal and explosion-proof masks. However, such masks are affected by seasons or environments, resulting in a decrease in the comfort of the human body during work, thereby reducing work efficiency. Grinding dust not only endangers the physical health of workers, but also poses a risk of explosion once it reaches a certain concentration when encountering a fire source. Dust is extremely tiny, generally less than 10 micrometers, and can remain suspended in the air for a long time, making it extremely easy to be inhaled by workers, severely deteriorating the physical functions of workers, causing pneumoconiosis, and finally losing the ability to work. When the concentration of iron dust generated by the most common metal iron grinding in grinding processing reaches 120 g / m 3 When the ignition point is 316 °C, an explosion will occur. The explosion of dust is also a common safety accident. Safe production has always been a problem highly valued by the country. It is urgent to solve the hidden danger of dust generated by high-speed grinding, which can accelerate the development of the intelligentization of mechanical manufacturing technology.

[0003] Regarding the harm of dust, it is necessary to collect it in a timely manner to reduce the dust concentration in the working environment and avoid harm to the physical functions of workers. If the dust is not reduced or eliminated in a timely manner, there will be serious safety hazards when it reaches a certain concentration. Especially for the powder generated by metal grinding, it is extremely easy to generate sparks. Existing dust removal equipment lacks safety devices, has low dust removal efficiency, and low automation. There is also a lack of effective means for further processing the collected metal dust. Therefore, the existing technology needs to be further improved. Summary of the Invention

[0004] Aiming at the deficiencies of the above-mentioned existing technology, an object of the present invention is to propose a safety explosion-proof dust removal system for high-speed grinding processes, which solves the problems that the powder generated by metal grinding is extremely easy to generate sparks, existing dust removal equipment lacks safety devices, has low dust removal efficiency, low automation, and lacks effective means for further processing the collected metal dust.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A safety explosion-proof dust removal system for high-speed grinding process, comprising a dust absorption device, an explosion-proof device, a cyclone dust removal device, a fan unit, a bag filter dust removal device, a dust recovery and conveying device, a dust briquetting device and an electric control unit. The dust absorption device includes a gas collecting hood and a first pipeline. The gas collecting hood is arranged at the inlet end of the first pipeline, and the outlet end of the first pipeline is connected to the inlet end of the cyclone dust removal device through the explosion-proof device.

[0007] The bag filter dust removal device is located on one side of the cyclone dust removal device. The outlet end of the cyclone dust removal device is connected and communicated with the inlet end of the fan unit through a second pipeline, and the outlet end of the fan unit is connected and communicated with the inlet port of the bag filter dust removal device through a third pipeline.

[0008] One side of the upper part of the bag filter dust removal device is provided with a pulse dust cleaning mechanism. The pulse dust cleaning mechanism includes an air bag. The air bag is connected to the bag filter dust removal device through a plurality of high-pressure air pipes. The other side of the upper part of the bag filter dust removal device is provided with an exhaust air pipe.

[0009] The dust recovery and conveying device includes a screw conveyor and a star-shaped ash discharge valve. The screw conveyor is horizontally arranged below the cyclone dust removal device. The lower ports of the cyclone dust removal device and the bag filter dust removal device are respectively connected and communicated with the top of the shell of the screw conveyor through one of the star-shaped ash discharge valves.

[0010] The dust briquetting device is located below one end of the screw conveyor. The top of the dust briquetting device is connected and communicated with the bottom of the shell of the screw conveyor through a gravity ash discharge valve. The bottom of the dust briquetting device has a square discharge port.

[0011] Further, there are two gas collecting hoods, both of which are horn-shaped shells. The two gas collecting hoods are respectively a top suction hood and a side suction hood.

[0012] The first pipeline has one outlet end and two inlet ends. The top suction hood and the side suction hood are respectively installed at the two inlet ends of the first pipeline. The top suction hood has an opening facing downwards. The side suction hood is located on one side below the top suction hood, and its opening direction is arranged in a cross-intersection with the opening direction of the top suction hood.

[0013] Further, the explosion-proof device includes a "V"-shaped pipe body and a one-way explosion-proof valve. One end of the "V"-shaped pipe body is hermetically connected to the outlet end of the first pipeline, and the other end is hermetically connected to the inlet end of the second pipeline through the one-way explosion-proof valve.

[0014] A spark detector is provided at the end of the "V"-shaped pipe body connected to the first pipeline. The signal end of the spark detector is communicatively connected to the electric control unit.

[0015] A water mist nozzle is provided on the inclined section of the "V"-shaped pipe body. The water mist nozzle can be connected to a water supply device through a water supply pipe. In addition, a drainage port is opened at the bottom of the "V"-shaped pipe body, and the drainage port is provided with a plugging cover.

[0016] Further, the cyclone dust removal device includes a first housing and a dust scraping mechanism. The first housing is composed of a swirl housing, a first conical cylinder, and a second conical cylinder connected in sequence from top to bottom. The air inlet end of the cyclone dust removal device is located on one side of the swirl housing, and the air outlet end is located at the top of the swirl housing.

[0017] There are two dust scraping mechanisms. One dust scraping mechanism is arranged between the swirl housing and the first conical cylinder, and the other dust scraping mechanism is arranged between the first conical cylinder and the second conical cylinder. In the working state, it can continuously scrape off the large particle dust adhering to the inner wall of the first housing.

[0018] Further, the lower end of the swirl housing is fixedly connected to the upper end of the first conical cylinder through an annular seat, and the lower end of the first conical cylinder is fixedly connected to the upper end of the second conical cylinder through the same annular seat. The inside of the annular seat has a cavity.

[0019] The dust scraping mechanism includes a large gear ring, a small gear, a scraper, and a first servo motor. The large gear ring is arranged inside the cavity of the annular seat, and its upper and lower surfaces are rotationally and sealingly matched with the inner wall of the annular seat. The small gear is arranged on one side of the large gear ring, and its gear shaft is rotationally matched with the annular seat. The first servo motor is installed at the bottom of the annular seat, and its output end drives the large gear ring to rotate through the small gear.

[0020] The scraper is vertically arranged inside the first housing, and one side of it is attached to the inner wall of the first housing. The upper end of the scraper passes through the gap between the lower end face of the swirl housing and the upper end face of the first conical cylinder or between the lower end face of the first conical cylinder and the upper end face of the second conical cylinder, and is fixedly connected to the inner side wall of the large gear ring.

[0021] Further, an air outlet pipe is provided at the center of the top of the swirl housing. The second pipe has one air inlet end and two air outlet ends. The air inlet end of the second pipe is fixedly and sealingly connected to the port of the air outlet pipe. The third pipe has one air outlet end and two air inlet ends.

[0022] The fan unit includes two fans. Each fan is equipped with a second servo motor. The two fans are arranged in parallel between the second pipe and the third pipe.

[0023] The air inlet of one of the fans is connected to one air outlet end of the second pipe through a pneumatic flange gate valve, and the air outlet of this fan is connected to one air inlet end of the third pipe through the same pneumatic flange gate valve.

[0024] Further, the bag filter dust removal device includes a second housing and a plurality of filter bags with skeletons. The second housing is a tank structure with a cylindrical upper part and a conical lower part. The top of the second housing has a top cover that closes it.

[0025] On the upper inner side of the second housing, there is a horizontally arranged partition board, which divides the inner part of the second housing into two independent chambers. All filter bags are arranged with their openings facing upwards and regularly on the partition board. Above each filter bag, there is an air nozzle, and all air nozzles are supplied with air by an air bag. A pressure relief valve is provided on the outer side wall of the second housing.

[0026] Both the air inlet and the air outlet of the air bag are equipped with manual valves. One end of each high-pressure air pipe is connected to the air bag, and the other end extends into the interior of the second housing. Each high-pressure air pipe is provided with an electromagnetic valve, and the signal ends of each electromagnetic valve are communicatively connected to the electronic control unit.

[0027] Further, the screw conveyor includes a shaft screw blade and a cylindrical third housing. The shaft screw blade is rotatably arranged inside the third housing. A servo motor three is provided outside one end of the third housing, and the servo motor three drives the shaft screw blade to rotate.

[0028] The top of the third housing has two feeding ports, and the two feeding ports of the third housing are respectively flange-sealed and connected to the discharge ports of the rotary air lock valve. The other end of the third housing has a discharge port at the bottom, and the discharge port of the third housing is connected and communicated with the gravity discharge valve.

[0029] Further, the gravity discharge valve includes a valve housing two, a hopper, and a valve plate two. The valve housing two is of a square structure, and a reduced-diameter pipe is provided at each of its upper and lower ends. The upper reduced-diameter pipe is flange-sealed and connected to the bottom flange of the screw conveyor, and the lower reduced-diameter pipe is flange-sealed and connected to the dust briquetting device.

[0030] The hopper is fixed to the upper inner side of the valve housing two. The valve plate two is located below the hopper, and one side of it is rotatably connected to the valve housing two through a rotating shaft two. One end of the rotating shaft two extends outside the valve housing two and is connected to a counterweight rod, and a counterweight block is detachably installed on the counterweight rod.

[0031] Further, the dust briquetting device includes a square box body, a first briquetting block, and a second briquetting block. The lower end of the gravity discharge valve is fixedly and hermetically connected to the top plate of the square box body and can communicate with the inside of the square box body.

[0032] The discharge port is located at the left front side of the bottom plate of the square box body and is slidably provided with a sealing plate. A cylinder one is provided on the left outer wall of the square box body, and the telescopic end of the cylinder one drives the sealing plate to slide and cooperate with the bottom plate of the square box body to open or close the discharge port.

[0033] The first briquetting block is movably arranged inside the square box body and is in transverse sliding and sealing cooperation with the inner wall of the square box body. A cylinder two is provided on the outer wall of the square box body on the side opposite to the cylinder one, and the telescopic end of the cylinder two can drive the first briquetting block to move left and right.

[0034] The second pressing block is movably arranged at the rear side of the discharge opening and is in longitudinal sliding sealing fit with the inner wall of the square box body. A cylinder three is arranged on the outer wall at the rear side of the square box body, and the telescopic end of the cylinder three can drive the second pressing block to move back and forth.

[0035] By adopting the above technical solutions, the beneficial technical effects of the present invention are as follows: The present invention adopts a two-stage dust removal design. The cyclone dust collector and the bag dust collector are used to collect dust particles with different particle sizes, improving the efficiency of dust collection. The ash scraping mechanism configured in the cyclone dust removal device further accelerates the sedimentation speed of metal dust. After the dust is inhaled, the spark is detected and eliminated in time, with good safety performance, high overall automation degree, low labor cost, and the ability to recycle and reuse metal dust. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of a safety explosion-proof dust removal system for high-speed grinding process of the present invention.

[0037] Figure 2 is Figure 1 a schematic structural diagram of a part of the present invention, showing the dust absorption device and the explosion-proof device.

[0038] Figure 3 is a schematic internal structure diagram of the one-way explosion-proof valve of the present invention.

[0039] Figure 4 is a schematic structural diagram of another part of the present invention in 1, showing the fan unit and related parts.

[0040] Figure 5 is a schematic structural diagram of the cyclone dust removal device of the present invention.

[0041] Figure 6 is a schematic combined structural diagram of the dust recovery and conveying device, the gravity ash discharge valve and the dust pressing block device of the present invention.

[0042] Figure 7 is a schematic internal structure diagram of the bag dust removal device of the present invention.

[0043] Figure 8 is a schematic combined structural diagram of the gravity ash discharge valve and the dust pressing block device of the present invention.

[0044] Figure 9 is Figure 8 a schematic internal structure diagram of the gravity ash discharge valve after removing the valve housing two in.

[0045] Figure 10 is Figure 8 a schematic internal structure diagram of the dust pressing block device after removing the upper cover in. Detailed Embodiments

[0046] The following further describes the embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0047] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated mechanism or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Example, in combination with Figures 1 to 10 , a safety explosion-proof dust removal system for high-speed grinding process, including a dust absorption device 1, an explosion-proof device 2, a cyclone dust removal device 3, a fan unit 4, a bag filter dust removal device 5, a dust recovery and conveying device, a dust briquetting device 9 and an electric control unit. The dust absorption device 1 includes a gas collection hood and a first pipeline 11. The gas collection hood is arranged at the inlet end of the first pipeline 11, and the outlet end of the first pipeline 11 is connected to the inlet end of the cyclone dust removal device 3 through the explosion-proof device 2. The electric control unit includes an electric control cabinet and a controller arranged in the electric control cabinet. The controller adopts a PLC controller existing in the prior art, and the electric control cabinet can be connected to the mains power to supply power to the electrical equipment of the safety explosion-proof dust removal system.

[0050] Specifically, there are two gas collection hoods, both of which are horn-shaped shells. The two gas collection hoods are respectively a top suction hood 12 and a side suction hood 13. The first pipeline 11 has one outlet end and two inlet ends. The top suction hood 12 and the side suction hood 13 are respectively installed at the two inlet ends of the first pipeline 11. The top suction hood 12 opens downward, and the side suction hood 13 is located on one side below the top suction hood 12, and its opening direction intersects with the opening direction of the top suction hood 12 at a right angle. The two gas collection hoods are respectively located at the top and one side of the grinding workpiece, sucking the generated particulate dust into its interior to avoid spreading into the environment.

[0051] In addition, the explosion-proof device 2 includes a "V"-shaped pipe body 21 and a one-way explosion isolation valve. One end of the "V"-shaped pipe body 21 is hermetically connected to the outlet end of the first pipeline 11, and the other end is hermetically connected to the inlet end of the second pipeline 14 through the one-way explosion isolation valve. The dust inhaled by the top suction hood 12 and the side suction hood 13 enters the "V"-shaped pipe body 21 and the one-way explosion isolation valve in sequence through the first pipeline 11, and then enters the fan unit 4.

[0052] A spark detector 22 is provided at one end of the "V"-shaped pipe body 21 connected to the first pipeline 11, and the signal end of the spark detector 22 is communicatively connected to the electronic control unit. The spark detector 22 monitors in real time whether there is an electric spark generated in the dust entering the "V"-shaped pipe body 21, and once an electric spark is detected, it will send a signal to the controller. A water mist nozzle 23 is provided on the inclined section of the "V"-shaped pipe body 21. The water mist nozzle 23 can be connected to the water supply device through a water supply pipe. In addition, a drain port is opened at the bottom of the "V"-shaped pipe body 21, and the drain port is configured with a plug cover 28. The controller controls the water mist nozzle 23 to spray water on the dust in the "V"-shaped pipe body 21 according to the signal received from the spark detector 22 to eliminate the electric spark, and at the same time notifies the staff. The staff opens the plug cover 28 to drain the water in the "V"-shaped pipe body 21, and after cleaning, tightens the plug cover 28 and continues to work.

[0053] The one-way explosion isolation valve includes a valve housing one 24, a connecting pipe 25, a valve plate one 26 and a counterweight handle 27. The connecting pipe 25 is provided on one side of the valve housing one 24. One end of it is hermetically connected to the other end of the "V"-shaped pipe body 21 by flange, and the other end extends into the interior of the valve housing one 24. The other side of the valve housing one 24 is connected to the air inlet end of the second pipeline 14 through a pipeline.

[0054] The valve plate one 26 is arranged inside the valve housing one 24 through a rotating shaft one. One end of the rotating shaft one extends outside the valve housing one 24 and is rotationally and hermetically matched with it. The counterweight handle 27 is located outside the valve housing one 24 and is fixedly connected to one end of the rotating shaft one.

[0055] The bag filter dust removal device 5 is located on one side of the cyclone dust removal device 3. The air outlet end of the cyclone dust removal device 3 is connected and communicated with the air inlet end of the fan unit 4 through the second pipeline 14. The air outlet end of the fan unit 4 is connected and communicated with the air inlet port of the bag filter dust removal device 5 through the third pipeline 15. In the working state, the fan unit 4 is in the on state. The fan unit 4 inhales the dust through the two air collection hoods into its interior in sequence through the "V"-shaped pipe body 21, the one-way explosion isolation valve and the cyclone dust removal device 3. When passing through the cyclone dust removal device 3, the large particles in the dust settle to the bottom of the cyclone dust removal device 3 and are discharged. The small particles in the dust enter the fan unit 4 through the air outlet pipe 37 at the top of the cyclone dust removal device 3, and enter the bag filter dust removal device 5 through the air outlet of the fan unit 4 for filtration.

[0056] Specifically, the cyclone dust removal device 3 includes an outer shell 31 and a dust scraping mechanism. The outer shell 31 is composed of a cyclone housing, a conical cylinder 1, and a conical cylinder 2 connected in sequence from top to bottom. The air inlet end of the cyclone dust removal device 3 is located on one side of the cyclone housing, and the air outlet end is located at the top of the cyclone housing.

[0057] There are two dust scraping mechanisms. One dust scraping mechanism is arranged between the cyclone housing and the conical cylinder 1, and the other dust scraping mechanism is arranged between the conical cylinder 1 and the conical cylinder 2. In the working state, it can continuously scrape off the large particle dust adhering to the inner wall of the outer shell 31. The lower end of the cyclone housing is fixedly connected to the upper end of the conical cylinder 1 through a ring seat 32, and the lower end of the conical cylinder 1 is fixedly connected to the upper end of the conical cylinder 2 through the same ring seat 32. The inside of the ring seat 32 has a cavity.

[0058] Specifically, the dust scraping mechanism includes a large toothed ring 33, a small gear 34, a scraper 35, and a servo motor 36. The large toothed ring 33 is arranged inside the cavity of the ring seat 32, and its upper and lower surfaces are in rotational sealing cooperation with the inner wall of the ring seat 32. The small gear 34 is arranged on one side of the large toothed ring 33, and its gear shaft is in rotational cooperation with the ring seat 32. The servo motor 36 is installed at the bottom of the ring seat 32, and its output end drives the large toothed ring 33 to rotate through the small gear 34.

[0059] The scraper 35 is vertically arranged inside the outer shell 31, and one side of it is attached to the inner wall of the outer shell 31. The upper end of the scraper 35 passes through the gap between the lower end face of the cyclone housing and the upper end face of the conical cylinder 1 or between the lower end face of the conical cylinder 1 and the upper end face of the conical cylinder 2, and is fixedly connected to the inner side wall of the large toothed ring 33. The large particles in the dust entering the inner part of the outer shell 31 settle spirally along its inner wall. The large toothed ring 33 drives the scraper 35 to make a circular motion, scraping off the dust adhering to the inner wall of the outer shell 31, accelerating its downward settlement, and entering the screw conveyor 71 through the star-shaped ash discharge valve 72 at the bottom of the outer shell 31 for collection and transportation.

[0060] Specifically, an air outlet pipe 37 is provided at the center of the top of the cyclone housing. The second pipe 14 has one air inlet end and two air outlet ends. The air inlet end of the second pipe 14 is fixedly and hermetically connected to the port of the air outlet pipe 37. The third pipe 15 has one air outlet end and two air inlet ends.

[0061] The blower unit 4 includes two blowers 41. The blowers 41 are impeller blowers 41. Each blower 41 is configured with a second servo motor 42. The two blowers 41 are arranged in parallel between the second pipeline 14 and the third pipeline. The air inlet of one blower 41 is connected to an air outlet end pipeline of the second pipeline 14 through a pneumatic flange gate valve 43, and the air outlet of this blower 41 is connected to an air inlet end pipeline of the third pipeline 15 through the same pneumatic flange gate valve 43. The air inlet of the other blower is directly connected to the other air outlet end pipeline of the second pipeline 14, and its air outlet is directly connected to the other air inlet end pipeline of the third pipeline 15. The two blowers 41 are connected in parallel. According to the actual dust concentration, one blower 41 can be selected to work alone, or the two blowers 41 can work simultaneously.

[0062] One side of the upper part of the bag filter device 5 is provided with a pulse cleaning mechanism. The pulse cleaning mechanism includes an air bag 6. The air bag 6 is connected to the bag filter device 5 through a plurality of high-pressure air pipes 61. The other side of the upper part of the bag filter device 5 is provided with an exhaust pipe 53. The bag filter device 5 includes an outer shell two 51 and fourteen filter bags 52 with skeletons. The outer shell two 51 is a tank structure with a cylindrical upper part and a conical lower part. The top of the outer shell two 51 has a top cover 511 that closes its upper end.

[0063] A horizontally arranged partition plate 54 is provided inside the upper part of the outer shell two 51. The partition plate 54 divides the interior of the outer shell two 51 into two independent chambers. The fourteen filter bags 52 are all open upward and are regularly arranged on the partition plate 54. Specifically, the fourteen filter bags 52 are vertically arranged in a row and column arrangement. Each row includes at least three linearly arranged filter bags 52. The filter bags 52 in each row are arranged at equal intervals. The number of rows of the filter bags 52 is equal to and corresponds one by one to the number of high-pressure air pipes 61. A nozzle 55 is provided above each filter bag 52, and all the nozzles 55 are supplied with air by the air bag 6. A rupture disc 56 is provided on the outer side wall of the outer shell two 51. The rupture disc 56 plays a protective role. If the bag filter device 5 explodes, the rupture disc 56 will crack, and the internal fittings and the shell of the bag filter device 5 will not be damaged. Only a new rupture disc 56 needs to be replaced.

[0064] The air inlet and the air outlet of the air bag 6 are both configured with hand valves 63. One end of each high-pressure air pipe 61 is connected to the air bag 6, and the other end extends into the interior of the outer shell two 51. Each high-pressure air pipe 61 is provided with an electromagnetic valve 62, and the signal ends of the electromagnetic valves 62 are all communicatively connected to the electronic control unit.

[0065] The small particles in the dust enter the interior of the outer shell two 51 of the bag filter device 5 after passing through the fan 41. A small part of the dust with larger particle sizes will fall to the bottom of the outer shell two 51, and most of the dust will move upward with the airflow. The gas filtered by the filter bag 52 enters the space above the partition 54, and the dust remains on the outer wall of the filter bag 52. After a period of time, the fan stops working, and the high-pressure gas in the air receiver 6 blows air into the interior of the filter bag 52 through the air nozzle 55. The dust on the outer wall of the filter bag 52 is blown off and settles to the bottom of the outer shell two 51, and then enters the screw conveyor 71 through the star-shaped ash discharge valve 72 for collection and transportation.

[0066] The dust recovery and transportation device includes a screw conveyor 71 and a star-shaped ash discharge valve 72. The screw conveyor 71 is horizontally arranged below the cyclone dust removal device 3. The lower ports of the cyclone dust removal device 3 and the bag filter device 5 are respectively connected and communicated with the top of the housing of the screw conveyor 71 through a star-shaped ash discharge valve 72.

[0067] The screw conveyor 71 includes a shaft screw blade and a cylindrical outer shell three. The shaft screw blade is rotatably arranged inside the outer shell three, and a servo motor three 73 is provided outside one end of the outer shell three. The servo motor three 73 drives the shaft screw blade to rotate.

[0068] The top of the outer shell three has two feed ports, and the two feed ports of the outer shell three are respectively flange-sealed and connected to the discharge ports of the star-shaped ash discharge valve 72. The other end of the outer shell three has a discharge port at the bottom, and the discharge port of the outer shell three is connected and communicated with the gravity ash discharge valve 8. The dust collected by the cyclone dust removal device 3 and the bag filter device 5 respectively passes through the star-shaped ash discharge valve 72 and enters the interior of the outer shell three of the screw conveyor 71. The servo motor three 73 drives the shaft screw blade to rotate to send the dust to the discharge port at the bottom of the other end of the outer shell three and enter the interior of the gravity ash discharge valve 8.

[0069] The gravity ash discharge valve 8 includes a valve housing two 81, a hopper 82 and a valve plate two 83. The valve housing two 81 is of a square structure, and a reduced-diameter pipe 84 is provided at each of its upper and lower ends. The upper reduced-diameter pipe 84 is flange-sealed and connected to the bottom of the screw conveyor 71, and the lower reduced-diameter pipe 84 is flange-sealed and connected to the dust briquetting device 9.

[0070] The hopper 82 is fixed to the upper inner side of the valve housing two 81. The valve plate two 83 is located below the hopper 82, and one side of it is rotatably connected to the valve housing two 81 through a rotating shaft two. One end of the rotating shaft two extends to the outside of the valve housing two 81 and is connected with a counterweight rod 85. A counterweight block 86 is detachably installed on the counterweight rod 85.

[0071] The counterweight rod 85 and the counterweight block 86 can enable the second valve plate 83 to seal the bottom of the ash hopper 82. Under normal conditions, the gravitational force of the counterweight rod 85 and the counterweight block 86 closes the bottom of the ash hopper 82. The dust falling through the reducing pipe 84 above accumulates inside the ash hopper 82. When the accumulated weight reaches a certain level, the gravitational force of the dust causes the second valve plate 83 to rotate around the second rotating shaft, opening the bottom of the ash hopper 82. The dust then falls into the square box body 91 of the dust briquetting device 9. After that, the second valve plate 83 closes again under the gravitational force of the counterweight rod 85 and the counterweight block 86. The collected dust is quantitatively fed into the dust briquetting device 9 at regular intervals through the gravity unloading valve 8 for compaction.

[0072] The dust briquetting device 9 is located below one end of the screw conveyor 71. The top of the dust briquetting device 9 is connected and communicated with the bottom of the housing of the screw conveyor through the gravity unloading valve 8. The bottom of the dust briquetting device 9 has a square discharge port. Specifically, the dust briquetting device 9 includes a square box body 91, a first briquetting block 92, and a second briquetting block 93. The lower end of the gravity unloading valve 8 is fixedly and sealingly connected to the top plate of the square box body 91 and can communicate with the inside of the square box body 91. A circular hole is provided in the upper cover of the square box body 91, and the lower port of the reducing pipe 84 below corresponds to the circular hole and is fixedly and sealingly connected to the upper cover of the square box body 91.

[0073] The discharge port is located at the corner of the left front side of the bottom plate of the square box body 91, and a sealing plate 94 is slidably arranged. Guide chutes are provided on the side walls of the discharge port. Three sides of the sealing plate 94 have outwardly protruding sliding strips, which are respectively slidably matched with the bottom plate of the square box body 91. A first cylinder 95 is provided on the left outer wall of the square box body 91. The telescopic end of the first cylinder 95 drives the sealing plate 94 to be slidably matched with the bottom plate of the square box body 91 to open or close the discharge port.

[0074] The first briquetting block 92 is movably arranged inside the square box body 91 and is slidably and sealingly matched with the inner wall of the square box body 91 in the horizontal direction. A second cylinder 96 is provided on the outer wall of the square box body 91 on the side opposite to the first cylinder 95. The telescopic end of the second cylinder 96 can drive the first briquetting block 92 to move left and right. The second briquetting block 93 is movably arranged at the rear side of the discharge port and is slidably and sealingly matched with the inner wall of the square box body 91 in the vertical direction. A third cylinder 97 is provided on the rear outer wall of the square box body 91. The telescopic end of the third cylinder 97 can drive the second briquetting block 93 to move back and forth.

[0075] Under normal circumstances, the first pressing block 92 is located on the right side of the square box body 91, and the second pressing block 93 is located on the rear side of the square box body 91 to ensure that the dust falling from the gravity ash discharge valve 8 smoothly enters the cavity of the square box body 91. After the dust enters the square box body 91, the first pressing block 92 moves to the left until it stops at the leftmost end of the stroke. Then, the second pressing block 93 moves forward to squeeze and compact the dust to form a solid block of a certain shape. The length and width of the pressing block are slightly smaller than the length and width of the discharge port. After compaction, the discharge port is opened. After the pressing block is discharged through the discharge port, the sealing plate 94 closes the discharge port.

[0076] The parts not described in the present invention can be realized by adopting or referring to the existing technologies.

[0077] The embodiments of the present invention are given for the purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0078] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A safety explosion-proof dust removal system for high-speed grinding process, comprising a dust absorption device, an explosion-proof device, a cyclone dust removal device, a fan unit, a bag filter dust removal device, a dust recovery and conveying device, a dust briquetting device and an electric control unit, characterized in that, The dust absorption device includes a gas collecting hood and a first pipeline. The gas collecting hood is arranged at the inlet end of the first pipeline, and the outlet end of the first pipeline is connected to the inlet end of the cyclone dust removal device through the explosion-proof device; The bag filter dust removal device is located on one side of the cyclone dust removal device. The outlet end of the cyclone dust removal device is connected and communicated with the inlet end of the fan unit through a second pipeline, and the outlet end of the fan unit is connected and communicated with the inlet port of the bag filter dust removal device through a third pipeline; One side of the upper part of the bag filter dust removal device is provided with a pulse cleaning mechanism. The pulse cleaning mechanism includes an air bag. The air bag is connected to the bag filter dust removal device through a plurality of high-pressure air pipes. The other side of the upper part of the bag filter dust removal device is provided with an exhaust pipe; The dust recovery and conveying device includes a screw conveyor and a star-shaped ash discharge valve. The screw conveyor is horizontally arranged below the cyclone dust removal device. The lower ports of the cyclone dust removal device and the bag filter dust removal device are respectively connected and communicated with the top of the shell of the screw conveyor through a star-shaped ash discharge valve; The dust briquetting device is located below one end of the screw conveyor. The top of the dust briquetting device is connected and communicated with the bottom of the shell of the screw conveyor through a gravity ash discharge valve. The bottom of the dust briquetting device has a square discharge port; The explosion-proof device includes a "V"-shaped pipe body and a one-way explosion isolation valve. One end of the "V"-shaped pipe body is hermetically connected to the outlet end of the first pipeline, and the other end is hermetically connected to the inlet end of the second pipeline; A spark detector is provided at one end of the "V"-shaped pipe body connected to the first pipeline. The signal end of the spark detector is communicatively connected to the electronic control unit; A water mist nozzle is provided on the inclined section of the "V"-shaped pipe body. The water mist nozzle can be connected to the water supply device through a water supply pipe. In addition, a drain port is opened at the bottom of the "V"-shaped pipe body, and the drain port is provided with a plugging cover; The cyclone dust removal device includes an outer shell one and a scraping mechanism. The outer shell one is composed of a swirl shell, a conical cylinder one, and a conical cylinder two connected in sequence from top to bottom. The inlet end of the cyclone dust removal device is located on one side of the swirl shell, and the outlet end is located at the top of the swirl shell; There are two scraping mechanisms. One scraping mechanism is arranged between the swirl shell and the conical cylinder one, and the other scraping mechanism is arranged between the conical cylinder one and the conical cylinder two. In the working state, the large-particle dust adhered to the inner wall of the outer shell one can be continuously scraped off; The bag filter dust removal device includes an outer shell two and a plurality of filter bags with skeletons. The outer shell two is a tank structure with a cylindrical upper part and a conical lower part. The top of the outer shell two has a top cover for closing it; A horizontally arranged partition is provided on the upper inner side of the outer shell two. The partition divides the interior of the outer shell two into two independent chambers. All the filter bags are opened upward and regularly arranged on the partition. A gas nozzle is provided above each filter bag, and all the gas nozzles are supplied with gas by the air bag. A pressure relief valve is provided on the outer side wall of the outer shell two; The inlet and outlet ports of the air bag are both provided with hand valves. One end of each high-pressure air pipe is connected to the air bag, and the other end extends into the interior of the outer shell two. Each high-pressure air pipe is provided with an electromagnetic valve, and the signal ends of each electromagnetic valve are communicatively connected to the electronic control unit.

2. The safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, There are two gas collecting hoods, both of which are trumpet-shaped shells. The two gas collecting hoods are respectively a top suction hood and a side suction hood; The first pipeline has an outlet end and two inlet ends. The top suction hood and the side suction hood are respectively installed at the two inlet ends of the first pipeline. The top suction hood has an opening facing downward, and the side suction hood is located on one side below the top suction hood, and its opening direction is arranged in a cross intersection with the opening direction of the top suction hood.

3. The safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, The lower end of the cyclone housing is fixedly connected to the upper end of the first conical cylinder through an annular seat. The lower end of the first conical cylinder is fixedly connected to the upper end of the second conical cylinder through the same annular seat. The interior of the annular seat has a cavity. The ash scraping mechanism includes a large gear ring, a small gear, a scraper, and a servo motor I. The large gear ring is arranged inside the cavity of the annular seat, and its upper and lower surfaces are rotatably and sealingly fitted with the inner wall of the annular seat. The small gear is arranged on one side of the large gear ring, and its gear shaft is rotatably fitted with the annular seat. The servo motor I is installed at the bottom of the annular seat, and its output end drives the large gear ring to rotate through the small gear. The scraper is vertically arranged inside the first housing, and one side of it is attached to the inner wall of the first housing. The upper end of the scraper passes through the gap between the lower end face of the cyclone housing and the upper end face of the first conical cylinder or between the lower end face of the first conical cylinder and the upper end face of the second conical cylinder, and is fixedly connected to the inner side wall of the large gear ring.

4. A safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, An air outlet pipe is provided at the center of the top of the cyclone housing. The second pipeline has an air inlet end and two air outlet ends. The air inlet end of the second pipeline is fixedly and sealingly connected to the port of the air outlet pipe. The third pipeline has an air outlet end and two air inlet ends. The fan unit includes two fans, and each fan is equipped with a servo motor II. The two fans are arranged in parallel between the second pipeline and the third pipeline. The air inlet of one fan is connected to one air outlet end of the second pipeline through a pneumatic flange gate valve, and the air outlet of this fan is connected to one air inlet end of the third pipeline through the same pneumatic flange gate valve. The air inlet of the other fan is directly connected to the other air outlet end of the second pipeline, and its air outlet is directly connected to the other air inlet end of the third pipeline.

5. The safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, The screw conveyor includes a shaft screw blade and a cylindrical outer shell III. The shaft screw blade is rotatably arranged inside the outer shell III. A servo motor III is provided outside one end of the outer shell III, and the servo motor III drives the shaft screw blade to rotate. The top of the outer shell III has two feed inlets, and the two feed inlets of the outer shell III are respectively flange-sealingly connected to the discharge outlets of the star-shaped ash discharge valves. The other end of the outer shell III has a discharge outlet at the bottom, and the discharge outlet of the outer shell III is connected and communicated with the gravity ash discharge valve.

6. The safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, The gravity ash discharge valve includes a valve housing II, a hopper, and a valve plate II. The valve housing II is of a square structure, and a reducing pipe is provided at each of its upper and lower ends. The upper reducing pipe is flange-sealingly connected to the bottom flange of the screw conveyor, and the lower reducing pipe is flange-sealingly connected to the dust briquetting device. The hopper is fixed to the upper inner part of the valve housing II. The valve plate II is located below the hopper, and one side of it is rotatably connected to the valve housing II through a rotating shaft II. One end of the rotating shaft II extends to the outside of the valve housing II and is connected with a counterweight rod, and a counterweight block is detachably installed on the counterweight rod.

7. A safety explosion-proof dust removal system for high-speed grinding process according to claim 1, characterized in that, The dust briquetting device includes a square box body, a first briquetting block, and a second briquetting block. The lower end of the gravity ash discharge valve is fixedly and sealingly connected to the top plate of the square box body and can communicate with the inside of the square box body. The discharge opening is located at the left front side of the bottom plate of the square box body, and a sealing plate is slidably arranged. A first cylinder is provided on the left outer wall of the square box body, and the telescopic end of the first cylinder drives the sealing plate to slidably cooperate with the bottom plate of the square box body to open or close the discharge opening; The first pressing block is movably arranged inside the square box body and is in transverse sliding and sealing cooperation with the inner wall of the square box body. A second cylinder is provided on the outer wall of the square box body on the side opposite to the first cylinder, and the telescopic end of the second cylinder can drive the first pressing block to move left and right; The second pressing block is movably arranged at the rear side of the discharge opening and is in longitudinal sliding and sealing cooperation with the inner wall of the square box body. A third cylinder is provided on the rear outer wall of the square box body, and the telescopic end of the third cylinder can drive the second pressing block to move back and forth.

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