A dust circulation type dust collecting device for block grinding

Abstract

The present invention discloses a dust circulation type dust collecting device for block grinding, which relates to the technical field of grinding, and comprises a box body, an upper partition and a lower partition, wherein the upper partition and the lower partition are located in the box body and separate an upper cavity, a middle cavity and a lower cavity, and two through holes opened on the lower partition are fixed with support rings, and the support ring is located on the outer wall of the lower cavity and is sleeved with a rotating rotating disk, and the outer walls of the two rotating disks are connected to the gear rings; the problem that a large amount of dust is directly adsorbed on another membrane filter cartridge under the action of negative pressure after splashing is avoided, and one membrane filter cartridge is cleaned while the other membrane filter cartridge is working, and the membrane filter cartridge can be cleaned without stopping the machine, and the problem that a large amount of dust is flying when the pulse device is sprayed for cleaning and is re-adsorbed on the membrane filter cartridge under the action of negative pressure is reduced, resulting in poor cleaning effect of the membrane filter cartridge, and multiple spraying is required to blow off the dust adsorbed on the membrane filter cartridge.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a dust circulation type dust collecting device for block grinding. Background Art

[0002] Graphite is an allotrope of carbon. It is a gray-black, opaque solid with stable chemical properties, corrosion resistance, and is not easy to react with acids, alkalis, and other agents. Natural graphite comes from graphite deposits, and can also be made into artificial graphite from petroleum coke, asphalt coke, etc. through a series of processes. Graphite has many excellent properties, such as high temperature resistance, oxidation resistance, electrical conductivity, thermal conductivity, etc., so it is widely used in metallurgy, machinery, electrical, chemical, textile, national defense and other industrial sectors. New graphite materials have great application prospects, such as making graphite electrodes instead of copper electrodes. In the use and preparation of graphite electrodes, since local protrusions are prone to occur on its surface, the protrusions need to be polished. In the process of polishing graphite, a lot of graphite dust and debris will be generated, so dust collection equipment is needed to collect the generated dust and debris.

[0003] The existing dust collector can absorb the dust and debris generated during the graphite grinding process by using the negative pressure pipe on the side. However, after the existing dust removal and grinding table has been used for a period of time, the filter cartridge inside will be blocked due to excessive dust and debris stored. The existing filter cartridge is sprayed with a pulse device to blow off the dust on the filter cartridge. During the spraying process of the filter cartridge, the fan needs to be stopped. Otherwise, when the fan is working, there will always be negative pressure on the two filter cartridges. Under the action of negative pressure, part of the dust after spraying will still be sucked back onto the filter cartridge, resulting in multiple spraying to remove the dust, resulting in poor cleaning efficiency. Summary of the invention

[0004] The object of the present invention is to provide a circulating dust collecting device for block-shaped grinding dust, which has the advantages of realizing cleaning of one membrane filter cartridge while the other membrane filter cartridge is working, and the membrane filter cartridge can be cleaned without stopping the machine. It also avoids a large amount of dust flying in the air during cleaning by a pulse device and being re-adsorbed on the membrane filter cartridge under the action of negative pressure, resulting in poor cleaning effect of the membrane filter cartridge and requiring multiple spraying to blow off the dust adsorbed on the membrane filter cartridge.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust collection device for block-shaped grinding dust circulation type, comprising a box body, an upper partition and a lower partition, the upper partition and the lower partition are located in the box body and separate an upper cavity, a middle cavity and a lower cavity, two through holes opened on the lower partition are fixed with support rings, the support ring is located on the outer wall of the lower cavity and is sleeved with a rotating disc, the outer walls of the two rotating discs are connected with a gear ring, and the gear ring between the two rotating discs is meshed with a gear on the lower partition;

[0006] The bottom of the support ring is axially connected to the arc plate assembly, the rotating disk is provided with a plurality of arc grooves, and the sealing assembly is provided for sealing or opening the through hole;

[0007] The gear rotates to drive the rotating disks on both sides to move in opposite directions, the sealing assembly on one side seals the corresponding through hole, the arc plate assembly rotates to form a cylindrical structure covering the membrane filter cartridge, and the sealing assembly on the other side opens the corresponding through hole, leaving a gap between the arc plate assemblies;

[0008] A through-type fan is installed in the upper cavity, and the negative pressure port of the through-type fan is connected with the middle cavity through the upper partition plate. A pulse device is arranged in the middle cavity, and the pulse device extends into the membrane filter cartridge through the through holes on both sides. The negative pressure pipe connected to the side of the box body is connected with the lower cavity.

[0009] Furthermore, a dual-axis motor connected to the gear is also provided on the middle cavity, and the ring gear is an incomplete gear structure.

[0010] Further, the sealing assembly is provided with two groups, each group of the sealing assembly comprises a sealing plate, a guide rod, a roller rod, a cam and a worm gear, the guide rod and the support frame are fixed between the upper partition plate and the lower partition plate, the two ends of the sealing plate are sleeved on the guide rod, and the side circumference of the sealing plate is movably connected with the roller rod;

[0011] The other shaft of the dual-shaft motor is provided with threaded teeth, and a worm gear mounted on the support frame is meshed with the threaded teeth. A cam is provided on the shaft connected to the center of the worm gear, and the cam is in contact with the roller. The rotation of the gear is used to drive the rotating disk and the cam to rotate. The rotation of the cam is used to raise or lower the sealing plate. The sealing plate is lowered and contacted with the support ring to seal the through hole. The sealing plate is raised and disengaged from the support ring to open the through hole. The sealing plates of the two groups of sealing assemblies are raised and lowered alternately.

[0012] Furthermore, a clamping seat is installed on the bottom surface of the support ring.

[0013] Furthermore, the arc plate assembly comprises an arc plate and a sliding groove, one end of the arc plate rotates around the axis of the support ring, and a sliding groove for inserting a lower slide rod is provided on the top surface of the arc plate.

[0014] Furthermore, the pulse device includes a blowing pipe, a switching valve and an air tank. The air tank is installed on the lower partition. The pipe connected to one end of the air tank passes through the box body for connecting to the air compressor. The pipe connected to the other end of the air tank is connected to the switching valve. The switching valve is divided into two paths and connected to two blowing pipes. The blowing pipe is installed on the sealing plate, wherein the switching valve is connected to the other shaft of the dual-axis motor, and the dual-axis motor is used to drive the gear to rotate and the switching valve to switch.

[0015] Furthermore, the bottom end of each arc-shaped plate is connected to the bottom plate through a rotating shaft, and the rotating shaft and the axis of the arc-shaped plate are gear-connected. When the arc-shaped plate rotates around the axis, the rotating shaft drives the bottom plate to rotate synchronously, so as to change the position of the bottom plate.

[0016] When the arc plate rotates to form a cylindrical structure, multiple bottom plates rotate to form a funnel structure that seals the bottom opening of the cylinder. After the arc plate rotates to form a gap, multiple bottom plates rotate in the opposite direction so that the membrane filter cartridge can be inserted from the lower end and assembled with the holder.

[0017] Furthermore, a dust exhaust pipe is connected to one of the bottom plates, and the dust exhaust pipe seals the bottom end of the funnel when multiple bottom plates form a funnel structure. The air outlet pipe of the turbo fan passes through the box body, and the bottom end of the dust exhaust pipe passes through the box body and is connected to the air outlet pipe.

[0018] Technical effects and advantages of the present invention:

[0019] When the present invention is used for cleaning, the pulse device starts to spray the membrane filter cartridge, and because the top of the membrane filter cartridge is sealed, there is no negative pressure above the membrane filter cartridge, and the dust after the spraying will not be adsorbed on the membrane filter cartridge under the action of negative pressure, and the dust will be blocked by the cylinder and then fall when blown outward, and at the same time, in order to avoid a large amount of dust splashing and then being directly adsorbed on another membrane filter cartridge under the action of negative pressure, one membrane filter cartridge can be cleaned while the other membrane filter cartridge is working, and the membrane filter cartridge can be cleaned without stopping the machine. Most of the dust can be blown off with one spray, and the amount of dust that is re-adsorbed on the membrane filter cartridge under the action of negative pressure when a large amount of dust is flying when the pulse device is sprayed for cleaning is reduced, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall structure diagram of the present invention;

[0021] Figure 2 It is the internal structure diagram of the box of the present invention;

[0022] Figure 3 It is a diagram showing the interlaced working state of the arc plate assembly and the sealing assembly on the lower baffle of the present invention;

[0023] Figure 4 It is a connection diagram of the pulse device and the sealing assembly of the present invention;

[0024] Figure 5 It is a partial exploded view of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified image of point A;

[0026] Figure 7 It is a structural diagram of the arc plate assembly of the present invention;

[0027] Figure 8 This is a structural diagram of Embodiment 2 of the present invention;

[0028] Fig. 9 This is a diagram showing a state in which the bottom plate of the present invention is unfolded for inserting a membrane filter cartridge;

[0029] Fig.10 It is a diagram showing the bottom plate of the present invention rotating around the axis of the arc-shaped plate;

[0030] Fig.11 For the present invention Fig.10 Enlarged view of point B.

[0031] In the figure:

[0032] 1. Box body; 11. Negative pressure pipe; 2. Upper partition; 3. Lower partition; 31. Gear; 4. Support ring; 41. Holder; 42. Coated filter cartridge; 5. Rotating disk; 51. Gear ring; 52. Arc groove; 6. Sealing assembly; 61. Sealing plate; 62. Guide rod; 63. Roller rod; 64. Cam; 65. Worm gear; 7. Arc plate assembly; 71. Arc plate; 711. Rotating shaft; 712. Bottom plate; 72. Sliding groove; 73. Lower sliding rod; 8. Pulse device; 81. Injection pipe; 82. Switching valve; 83. Air storage tank; 9. Dust exhaust pipe; 10. Turbine fan. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Reference Figure 1-Figure 7 , which is the first embodiment of the present invention, provides a circulating dust collecting device for block grinding dust, including a box body 1, an upper partition 2 and a lower partition 3, the upper partition 2 and the lower partition 3 are located in the box body 1 and separate an upper chamber, a middle chamber and a lower chamber, the upper chamber, the middle chamber and the lower chamber are independent of each other, and a support ring 4 is fixed in each of the two through holes opened on the lower partition 3, the support ring 4 is located on the outer wall of the lower chamber and is sleeved with a rotating rotating disk 5, the rotating disk 5 can rotate around the support ring 4, the outer walls of the two rotating disks 5 are connected with a gear ring 51, and the gear ring 51 between the two rotating disks 5 is meshed with the gear 31 on the lower partition 3;

[0035] The bottom of the support ring 4 is axially connected to the arc plate assembly 7, the rotating disk 5 is provided with a plurality of arc grooves 52, and the sealing assembly 6 is provided for sealing or opening the through hole;

[0036] The gear 31 rotates to drive the rotating disks 5 on both sides to make opposite movements, the sealing assembly 6 on one side seals the corresponding through hole, and the arc plate assembly 7 rotates to form a cylindrical structure covering the membrane filter cartridge 42, while the sealing assembly 6 on the other side opens the corresponding through hole, and a gap is left between the arc plate assemblies 7;

[0037] A through-type blower 10 is installed in the upper cavity, and the negative pressure port of the through-type blower 10 is connected to the middle cavity through the upper partition 2. A pulse device 8 is arranged in the middle cavity, and the pulse device 8 extends into the membrane filter cartridge 42 through the through holes on both sides. A negative pressure pipe 11 connected to the side of the box body 1 is connected to the lower cavity, and the port of the negative pressure pipe 11 is connected to a grinder (such as Figure 1 As shown, the device connected to the left side of the negative pressure pipe 11 is a grinder, which grinds block graphite. The negative pressure pipe 11 draws the dust-containing gas in the grinder into the lower chamber). The negative pressure generated after the turbofan 10 is started will draw the gas in the negative pressure pipe 11 and then be discharged from the turbofan 10 through the lower chamber and the middle chamber. The dust generated by the grinder when working is sucked up by the negative pressure, and the dust is filtered by the membrane filter cartridge 42 in the lower chamber.

[0038] This dust collection device has three operating states;

[0039] 1. Dust collection state: At this time, there is a gap between the two arc plate components 7, and the two membrane filter cartridges 42 are in working state. At this time, the negative pressure is the largest and the two membrane filter cartridges 42 share the filtering task;

[0040] 2. Cleaning status 1:

[0041] When there is too much dust on one of the membrane filter cartridges 42, it is necessary to perform pulse cleaning on the membrane filter cartridge 42. The sealing assembly 6 on one side seals the corresponding through hole, and the arc plate assembly 7 rotates to form a cylindrical structure covering the membrane filter cartridge 42, while the sealing assembly 6 on the other side opens the corresponding through hole, and a gap is left between the arc plate assemblies 7. Negative pressure air flows into the other membrane filter cartridge 42 from the gap. At this time, the other membrane filter cartridge 42 is still in a working state, while the other membrane filter cartridge 42 is in a cut-off state. The pulse device 8 starts to spray the membrane filter cartridge 42, and because the top of the membrane filter cartridge 42 is sealed, there is no negative pressure above the membrane filter cartridge 42, and the dust after the spraying will not be adsorbed on the membrane filter cartridge 42 under the action of negative pressure. Due to the cylindrical structure of the arc plate assembly 7, the dust will be blocked by the cylinder and then fall when it is blown outward. At the same time, in order to avoid a large amount of dust splashing and then being directly adsorbed on another membrane filter cartridge 42 under the action of negative pressure, one membrane filter cartridge 42 can be cleaned while the other membrane filter cartridge 42 is working.

[0042] 3. Cleaning status 2:

[0043] The working states of the two membrane filter cartridges 42 are switched by rotating the gear 31 .

[0044] The above-mentioned actions can be used to clean the membrane filter cartridge 42 without stopping the machine, and the negative pressure pipe 11 can work continuously, avoiding the need to stop the machine for cleaning after the two membrane filter cartridges 42 are blocked by dust. It also reduces the large amount of dust flying when the pulse device 8 is sprayed for cleaning, and the dust is re-adsorbed on the membrane filter cartridge 42 under the action of negative pressure, resulting in poor cleaning effect of the membrane filter cartridge 42, and multiple spraying is required to blow off the dust adsorbed on the membrane filter cartridge 42.

[0045] A dual-axis motor connected to the gear 31 is also provided on the middle cavity. The gear ring 51 is an incomplete gear structure. After the gear 31 rotates and disengages from the teeth of the gear ring 51 , it is at the end of the travel of the two rotating disks 5 .

[0046] One shaft of the dual-axis motor drives the gear 31 to rotate. During the rotation, the gear 31 drives the two ring gears 51 to make opposite movements. The ring gear 51 is an incomplete gear to limit the rotation range of the rotating disk 5. The ring gear 51 and the gear 31 can mesh.

[0047] There are two groups of sealing assemblies 6, each group of sealing assemblies 6 includes a sealing plate 61, a guide rod 62, a roller rod 63, a cam 64 and a worm gear 65, the guide rod 62 and the support frame are fixed between the upper partition 2 and the lower partition 3, the two ends of the sealing plate 61 are sleeved on the guide rod 62, and the side circumference of the sealing plate 61 is movably connected with the roller rod 63;

[0048] Threaded teeth are provided on the other shaft of the dual-axis motor, and a worm gear 65 mounted on the support frame is meshed with the threaded teeth. A cam 64 is provided on the shaft connected to the center of the worm gear 65, and the cam 64 is in contact with the roller 63. The rotation of the gear 31 is used to drive the rotating disk 5 and the cam 64 to rotate. The rotation of the cam 64 is used to raise or lower the sealing plate 61. The sealing plate 61 descends and contacts the support ring 4 to seal the through hole. The sealing plate 61 rises and disengages from the support ring 4 to open the through hole. The sealing plates 61 of the two sets of sealing assemblies 6 are alternately raised and lowered.

[0049] During the startup of the dual-axis motor, the other axis rotates to drive the worm gear 65 to rotate, and the rotation of the worm gear 65 can drive the cam 64 to rotate, wherein the cam 64 is elliptical, and an elliptical groove for the roller 63 to be inserted is provided on the side of the cam 64, and the roller 63 is lifted and lowered during the rotation of the cam 64 to drive the sealing plate 61 to lift and lower;

[0050] Since the sealing assembly 6 is provided with two groups, when one sealing plate 61 descends to the lowest point, the other sealing plate 61 rises to the highest point. By alternately upgrading the two sealing plates 61, the purpose of sealing the through hole of one support ring 4 and opening the through hole of the other support ring 4 is achieved.

[0051] The arc plate assembly 7 includes an arc plate 71 and a sliding groove 72. One end of the arc plate 71 rotates around the axis of the support ring 4. A sliding lower rod 73 is arranged in the arc groove 52. A sliding groove 72 for inserting the lower rod 73 is opened on the top surface of the arc plate 71. A clamping seat 41 is installed on the bottom surface of the support ring 4, and the membrane filter cartridge 42 is assembled with the clamping seat 41.

[0052] During the rotation of the rotating disk 5, the synchronous rotation of the arc groove 52 will push the lower slide rod 73 to move in the arc groove 52 and the sliding groove 72 to realize the rotation of the arc plate 71 around the axis, thereby forming a cylindrical structure or an expanded gap structure. An expanded gap structure is formed in the arc plate 71 for air flow to pass through. At the same time, when the coated filter cartridge 42 is replaced from the lower end, the assembly position can be intuitively seen through the gap without affecting the field of vision, thereby avoiding the situation where the cylindrical structure is always in place and the assembly position cannot be seen, affecting the assembly effect.

[0053] The pulse device 8 includes a blowing pipe 81, a switching valve 82 and an air tank 83. The air tank 83 is installed on the lower partition 3. The pipe connected to one end of the air tank 83 passes through the box 1 for connecting to the air compressor. The pipe connected to the other end of the air tank 83 is connected to the switching valve 82. The switching valve 82 is divided into two paths and connected to two blowing pipes 81. The blowing pipe 81 is installed on the sealing plate 61. The switching valve 82 is connected to the other shaft of the dual-axis motor. The dual-axis motor is used to drive the gear 31 to rotate and the switching valve 82 to switch.

[0054] The air compressor stores high-pressure gas in the gas tank 83, and switches the working state of the two blowing pipes 81 through the switching valve 82. The switching action of the switching valve 82 is realized by the shaft of the dual-axis motor. When cleaning is required, the sealing plate 61 descends to seal the through hole, and the high-pressure gas generated by the blowing pipe 81 on the sealing plate 61 is blown onto the membrane filter cartridge 42 to realize the cleaning action.

[0055] At the same time, the cylindrical structure is formed to be lower than the negative pressure pipe 11, and the dust falling from the cylindrical structure is away from the mouth of the negative pressure pipe 11 to reduce the dust being carried to the membrane filter cartridge 42 by the negative pressure airflow. At the same time, a dust collecting drawer is provided at the bottom of the membrane filter cartridge 42 to collect the dust blown down by the pulse. After collecting enough dust, the dust collecting drawer is pulled out and the dust is poured out for unified treatment.

[0056] Example 2: Reference Figure 8-Figure 11 , which is the second embodiment of the present invention. During the implementation of the first embodiment, it was found that the bottom opening of the cylindrical structure formed by the arc plate 71 was relatively large, resulting in the dust falling from the cylindrical structure under the negative pressure state still flowing to the other working membrane filter cartridge 42 under the negative pressure state, accelerating the dust amount of the other membrane filter cartridge 42;

[0057] In order to solve the above problems, this embodiment is provided with a bottom plate 712 and a dust exhaust pipe 9. During the rotation of the arc plate 71, the bottom plate 712 and the dust exhaust pipe 9 can be unscrewed to provide sufficient space for the assembly of the coated filter cartridge 42. At the same time, when the arc plate 71 is rotated into a cylindrical structure, the bottom plate 712 forms a funnel structure, which can seal the entire coated filter cartridge 42, allowing the blown dust to fall directly into the dust exhaust pipe 9 to reduce the amount that will not be in the lower cavity, avoid the problem that a small part of the dust after spraying continues to be adsorbed on another coated filter cartridge 42 from the lower end, and avoid the existing need to pull out the dust box to dump the dust, and the equipment also needs to be shut down during dumping, affecting the working efficiency of the equipment.

[0058] The bottom end of each arc-shaped plate 71 is connected to the bottom plate 712 through a rotating shaft 711. The rotating shaft 711 and the axis of the arc-shaped plate 71 are gear-connected. When the arc-shaped plate 71 rotates around the axis, the rotating shaft 711 drives the bottom plate 712 to rotate synchronously, so as to change the position of the bottom plate 712.

[0059] The arc plate 71 will drive the rotating shaft 711 to rotate around the axis during the rotation process. Since the teeth on the axis are fixed, the rotating shaft 711 will rotate along with the arc plate 71 during the rotation process, thereby driving the bottom plate 712 to rotate.

[0060] When the arc plate 71 rotates to form a cylindrical structure, the multiple bottom plates 712 rotate to form a funnel structure that seals the bottom opening of the cylinder. After the arc plate 71 rotates to form a gap, the multiple bottom plates 712 rotate in the opposite direction to increase the bottom diameter so that the membrane filter cartridge 42 can be inserted from the lower end and assembled with the holder 41.

[0061] A dust exhaust pipe 9 is connected to one of the bottom plates 712. When multiple bottom plates 712 form a funnel structure, the dust exhaust pipe 9 seals the bottom end of the funnel. The air outlet pipe of the turbo fan 10 passes through the box body 1, and the bottom end of the dust exhaust pipe 9 passes through the box body 1 and is connected to the air outlet pipe. The connection between the dust exhaust pipe 9 and the air outlet pipe is in a "T" shape.

[0062] The flow rate in the air outlet duct of the turbo fan 10 is relatively large, while the flow rate in the dust exhaust duct 9 is relatively small. According to the principle of "large flow rate, small pressure", negative pressure will be generated in the dust exhaust duct 9, so that the dust falling in the dust exhaust duct 9 will flow into the air outlet duct, thereby quickly discharging the dust from the box body 1 for the circulation and collection of dust. At the same time, the dust can be processed without stopping the machine.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circulating dust collecting device for block-shaped grinding dust, comprising a housing (1), an upper partition (2) and a lower partition (3), wherein the upper partition (2) and the lower partition (3) are located in the housing (1) and separate an upper chamber, a middle chamber and a lower chamber, and characterized in that: A support ring (4) is fixed in each of the two through holes formed on the lower partition (3); the support ring (4) is located on the outer wall of the lower cavity and is sleeved with a rotating disk (5); the outer walls of the two rotating disks (5) are connected to a gear ring (51); the gear ring (51) between the two rotating disks (5) is meshed with a gear (31) on the lower partition (3); The bottom of the support ring (4) is axially connected to the arc plate assembly (7), the rotating disk (5) is provided with a plurality of arc grooves (52), and the sealing assembly (6) is configured to seal or open the through hole; The gear (31) rotates to drive the rotating disks (5) on both sides to perform opposite movements, the sealing assembly (6) on one side seals the corresponding through hole, the arc plate assembly (7) rotates to form a cylindrical structure covering the membrane filter cartridge (42), and the sealing assembly (6) on the other side opens the corresponding through hole, leaving a gap between the arc plate assemblies (7); A through-type fan (10) is installed in the upper chamber, and the negative pressure port of the through-type fan (10) passes through the upper partition plate (2) and is connected to the middle chamber. A pulse device (8) is arranged in the middle chamber, and the pulse device (8) extends into the membrane filter cartridge (42) through the through holes on both sides. The negative pressure pipe (11) connected to the side of the box body (1) is connected to the lower chamber.

2. A block-shaped grinding dust circulation type dust collecting device according to claim 1, characterized in that: The middle cavity is also provided with a dual-axis motor connected to the gear (31), and the ring gear (51) is an incomplete gear structure.

3. A block-shaped grinding dust circulation type dust collecting device according to claim 2, characterized in that: The sealing assembly (6) is provided in two groups, each group of the sealing assembly (6) comprises a sealing plate (61), a guide rod (62), a roller rod (63), a cam (64) and a worm gear (65), the guide rod (62) and the support frame are fixed between the upper partition plate (2) and the lower partition plate (3), the two ends of the sealing plate (61) are sleeved on the guide rod (62), and the side circumference of the sealing plate (61) is movably connected to the roller rod (63); The other shaft of the dual-shaft motor is provided with threaded teeth, a worm gear (65) mounted on the support frame meshes with the threaded teeth, a cam (64) is provided on a shaft connected to the center of the worm gear (65), the cam (64) contacts the roller (63), the gear (31) rotates to drive the rotating disk (5) and the cam (64) to rotate, the cam (64) rotates to cause the sealing plate (61) to rise or fall, the sealing plate (61) descends to contact the support ring (4) to seal the through hole, the sealing plate (61) rises to disengage from the support ring (4) to open the through hole, and the sealing plates (61) of the two sets of sealing assemblies (6) are alternately raised and lowered.

4. A circulating dust collector for block-shaped grinding dust according to claim 3, characterized in that: A clamping seat (41) is installed on the bottom surface of the support ring (4).

5. A circulating dust collector for block-shaped grinding dust according to claim 4, characterized in that: The arc plate assembly (7) comprises an arc plate (71) and a sliding groove (72), one end of the arc plate (71) rotates around the axis of the support ring (4), a sliding lower rod (73) is provided in the arc groove (52), and a sliding groove (72) for the lower rod (73) to be inserted is provided on the top surface of the arc plate (71).

6. A circulating dust collector for block-shaped grinding dust according to claim 5, characterized in that: The pulse device (8) comprises a blowing pipe (81), a switching valve (82) and an air tank (83). The air tank (83) is mounted on the lower partition (3). A pipeline connected to one end of the air tank (83) passes through the box (1) for connecting to an air compressor. A pipeline connected to the other end of the air tank (83) is connected to the switching valve (82). The switching valve (82) is divided into two paths and connected to two blowing pipes (81). The blowing pipe (81) is mounted on the sealing plate (61). The switching valve (82) is connected to the other shaft of the double-shaft motor. The double-shaft motor is used to drive the gear (31) to rotate and the switching valve (82) to switch.

7. A circulating dust collector for block-shaped grinding dust according to claim 6, characterized in that: The bottom end of each of the arc-shaped plates (71) is connected to the bottom plate (712) via a rotating shaft (711), and the rotating shaft (711) and the axis of the arc-shaped plate (71) are gear-connected. When the arc-shaped plate (71) rotates around the axis, the rotating shaft (711) drives the bottom plate (712) to rotate synchronously, so as to change the position of the bottom plate (712); When the arc-shaped plate (71) rotates to form a cylindrical structure, the multiple bottom plates (712) rotate to form a funnel structure that seals the bottom opening of the cylinder. After the arc-shaped plate (71) rotates to form a gap, the multiple bottom plates (712) rotate in the opposite direction so that the membrane filter cartridge (42) can be inserted from the lower end and assembled with the holder (41).

8. A block-shaped grinding dust circulation type dust collecting device according to claim 7, characterized in that: A dust exhaust pipe (9) is connected to one of the bottom plates (712); the dust exhaust pipe (9) seals the bottom end of the funnel when the multiple bottom plates (712) form a funnel structure; an air outlet pipe of the turbo fan (10) passes through the box body (1); and the bottom end of the dust exhaust pipe (9) passes through the box body (1) and is connected to the air outlet pipe.

Images