Rotary dust removal device

Abstract

According to the rotary dust removal device, a rotating part comprises a shell composed of a front shell and a rear shell, when high-pressure gas is input into a fixing rod, the gas is ejected out of gas holes of a dust removal pipe, and the rotating part is pushed to rotate smoothly through the counter-acting force of the ejected high-speed gas; the rotating part drives the dust removal pipe to automatically rotate and spray high-speed airflow to remove particles such as dust attached to the surface of the filter cartridge, in the using process, the rotating part is composed of the two shells, the exhaust groove blowing air in the opposite direction can be conveniently arranged to be matched with a bearing, exhaust is well achieved, and dust is prevented from entering the bearing; lubricating oil (butter) in the bearing can be prevented from being blown away from the bearing when high-pressure gas is input, the rotating stability is high, the swinging performance is small, the bearing can be used for a long time without maintenance, the manufacturing cost is low, the cleaning effect is good, the fixing rod is provided with the supporting shoulder part which is extruded and contracted to be used in cooperation with the rotating component, and the fixing rod is easy to produce and convenient to use. And the cost is further saved.

Description

Technical Field

[0001] The utility model relates to the fields of spraying, polishing, dust removal, etc., and specifically relates to a rotary dust removal device. Background Art

[0002] For example, during the processes of powder spraying and spraying, an air extraction and filtration mechanism needs to be arranged inside the powder spraying chamber so that the air flow can flow from the workpiece inlet and the powder spraying window into the powder spraying chamber. The powder ejected from the spray gun will not splash back inside the powder spraying chamber, and it can also be avoided that the powder flies out reversely from the powder spraying window and the workpiece inlet. The excess powder that enters the powder spraying chamber but is not attached to the surface of the workpiece will be sucked to gather around the air extraction and filtration mechanism and precipitate below the filtration mechanism inside the powder spraying chamber, which is beneficial for the recycling of the powder and can also better avoid the pollution caused by the dust flying out of the room. The air extraction mechanism plays an important role during the powder spraying process. The existing air extraction and filtration mechanism is provided with several filter cylinders at the rear end inside the powder spraying chamber. The lower part of the filter cylinder is closed, and the upper end of the filter cylinder is fixed to the top of the powder spraying chamber. The filter cylinder is air-extracted by an air extraction fan, and the air flow inside the powder spraying chamber will flow towards the periphery of the filter cylinder. During the powder spraying process, the excess splashed paint powder and dust will gather along with the air flow towards the periphery of the filter cylinder and precipitate around the lower part of the filter cylinder. There will also be more dust adsorbed on the filter membrane (or surface) of the filter cylinder. However, after being used for a period of time, more dust will be adsorbed in the filter membrane of the filter cylinder, blocking the entire filter cylinder, affecting the air flow passing through the filter membrane of the filter cylinder, and unable to achieve the effect of air extraction and filtration. An anti-powder rotation device can be arranged inside the filter cylinder to blow air reversely from the inside to the outside to clean the paint powder attached to the surface of the filter cylinder, which will be more convenient. Summary of the Invention

[0003] As described in the above background art, dust is easily adsorbed in the filter membrane of the filter cylinder, affecting the air flow passing through and unable to achieve the effect of air extraction and filtration. The utility model provides a rotary dust removal device. When high-pressure gas is input into the fixed rod, after the gas passes through the rotating device, it is ejected from the air holes of the dust removal pipe. The reaction force of the ejected high-speed gas pushes the rotating part to rotate smoothly. The rotating part drives the dust removal pipe to automatically rotate and spray high-speed air flow to remove dust and other particles attached to the surface of the filter cylinder. During the use process, the rotating part is provided with a housing composed of a front shell and a rear shell, and an exhaust groove, a gas blocking part and a bearing are arranged in the housing to cooperate to achieve the smooth rotation and exhaust of the rotating part, which can better exhaust and prevent dust from entering the bearing or the gap of the rotating device. It can also prevent the lubricating oil (grease) in the bearing from being blown away when high-pressure gas is input. The rotation stability is high, the swing is small, it can be used for a long time without maintenance, it is more stable during the use process, the cleaning effect is good, and the manufacturing cost is low.

[0004] The technical solution adopted by the present utility model to solve the technical problem is: a rotary dust removal device, including a rotating component, the rotating component includes a housing composed of a front housing and a rear housing, a bearing positioning portion is provided in the housing, a bearing is provided in the bearing positioning portion, the bearing can be connected to a fixed rod, rotating arms are provided on both sides of the housing, a dust removal pipe is provided at the end of the rotating arm, and a channel is provided inside the rotating arm and communicates with the air inlet of the dust removal pipe.

[0005] A clamping portion is provided at the end of the rotating arm, a dust removal pipe is provided in the clamping portion, a plurality of air injection holes are provided in the dust removal pipe, the upper and lower ends of the dust removal pipe are closed ends. When the fixed rod is inserted and fitted into the inner hole of the bearing of the housing, gas is input at the upper end of the fixed rod, the gas can enter the channel of the rotating arm from the through hole of the fixed rod, and then be ejected from the air injection holes of the dust removal pipe. Under the action of the reverse force of the gas, the dust removal pipe pushes the rotating component to drive the dust removal pipe to rotate.

[0006] A gas blocking portion is provided in the housing, the gas blocking portion is provided at the lower end of the bearing, and the gas blocking portion is integrally connected to the housing or the gas blocking portion is a detachable exhaust ring, and the exhaust ring is installed at the lower end of the bearing of the housing.

[0007] The gas blocking portion provided in the housing includes an upper blocking portion and a lower blocking portion. The upper blocking portion blocks the upper end of the gap of the rotating portion of the bearing, and the lower blocking portion blocks the lower end of the gap of the rotating portion of the bearing.

[0008] The gas blocking portion provided in the housing includes an upper blocking portion and a lower blocking portion. The lower blocking portion is an exhaust ring. The exhaust ring is provided with a plurality of protruding support portions and an inner hole. The fixed rod can pass through the inner hole of the exhaust ring and there is no contact between the fixed rod and the inner hole of the exhaust ring. An exhaust gap is formed between the support portion of the exhaust ring and the upper end face of the bearing. The upper blocking portion blocks the upper end of the gap of the rotating portion of the bearing, and the lower blocking portion blocks the lower end of the gap of the rotating portion of the bearing.

[0009] An exhaust groove for exhaust pressure relief is provided in the bearing positioning portion of the housing. The exhaust groove can discharge the gas entering the gap between the inner hole of the gas blocking portion and the outer diameter of the fixed rod. The air outlet ends of the exhaust grooves in the front housing and the rear housing face each other for exhaust, forming an opposing air blowing.

[0010] A pipe clamping portion is provided at the lower end of the housing of the rotating component. A connecting pipe is installed in the pipe clamping portion. The upper and lower ends of the connecting pipe are respectively connected to the rotating components. The two rotating components and the connecting pipe are connected as a whole to form an overall rotating device. The gas entering the connecting pipe will flow into the two rotating components and then flow into the air holes of the dust removal pipe and be ejected.

[0011] The aperture of the connecting pipe is larger than the inner hole of the bearing. The length of the connecting pipe can be selected according to actual usage needs. During use, the two rotating components are connected to the connecting pipe as a whole, so that the bearings between the two rotating components are relatively far apart. Even if dust removal pipes are provided on both sides of the rotating components during rotation, the swing during rotation will be relatively small, and the smoothness and accuracy of rotation are relatively high.

[0012] Reinforcing ribs are provided at the ends of the channels of the rotating arms on both the left and right sides of the rotating component. The shielding of the reinforcing ribs reduces the aperture at the end of the channel, enabling the gas to be blown into the dust removal pipe more concentratedly, and improving the connection stability and airtightness between the clamping portion and the dust removal pipe.

[0013] When the fixed rod is inserted into the inner hole of the bearing of the rotating component and a high-pressure air pipe is connected to the upper end of the fixed rod, when high-pressure gas is input, the gas enters the rotating component or the connecting pipe through the through-hole of the fixed rod, then enters the dust removal pipe through the channel of the rotating arm, and is then ejected from the air injection holes, that is, the gas ejected from the through-hole can flow to the channel of the rotating component, then enters the dust removal pipe through the air inlet hole of the dust removal pipe, and is then ejected from a number of air injection holes. When the gas is ejected from the air holes, the two dust removal pipes will, under the action of the gas reaction force, push the rotating component and the dust removal pipe to rotate, and the high-speed air flow ejected from the air holes of the dust removal pipe.

[0014] Positioning bones are provided in the clamping portion of the rotating component. The positioning bones can be inserted into the positioning holes of the dust removal pipe for cooperation, better fixing the dust removal pipe in the clamping portion, and avoiding the loosening of the connection between the dust removal pipe and the clamping portion when the air injection holes of the dust removal pipe eject high-pressure gas, which can play a role in connection stability and positioning.

[0015] The upper end of the fixed rod is provided with a support shoulder formed by extrusion and contraction, and then external threads are provided in the support shoulder. During use, since the upper end of the fixed rod needs to be provided with a contracted support shoulder for positioning cooperation with the upper end opening of the outer sleeve, and external threads need to be provided in the support shoulder for cooperation with the nut to fix the upper end of the outer sleeve to the upper end of the fixed rod, it can avoid the thinning of the thickness of the support shoulder.

[0016] The fixed rod includes a first-stage pipe and a second-stage pipe. When the lower end of the first-stage pipe is inserted into the lower end of the second-stage pipe, the lower end of the first-stage pipe is connected and fixed to the second-stage pipe by extrusion and contraction using a hydraulic press, forming an integral fixed rod. The process of connecting and fixing the first-stage pipe and the second-stage pipe by extrusion and contraction is simple, convenient and efficient during production, without welding, and can better save manufacturing costs.

[0017] The connection between the first-stage pipe and the second-stage pipe of the fixed rod is detachable, including any one of screw thread connection or snap connection. The fixed rod can be disassembled, the length is reduced during transportation, which is convenient, and the installation during use is also convenient.

[0018] At the lower end of the housing of the rotating component, there are provided a bearing positioning portion, a gas blocking portion, a bearing, and an exhaust groove that are the same as those at the upper end. The overall rotating device is formed by connecting two rotating components to a dust removal pipe.

[0019] A through hole communicating with the channel of the rotating component is provided in the fixed rod. The fixed rod can be inserted into the bearing of the rotating component. The through hole is located at the middle position between the two bearings of the rotating component. Gas can enter the corresponding rotating component from the through hole of the fixed rod, and then enter the dust removal pipe through the channel of the rotating arm, and then be ejected from the air injection holes, that is, the gas ejected from the through hole can flow into the channel of the rotating component, and then enter the dust removal pipe through the air inlet hole of the dust removal pipe, and then be ejected from several air injection holes. When gas is ejected from the air holes, the two dust removal pipes will be pushed by the reverse force of the gas to drive the rotating component and the dust removal pipe to rotate, and the high-speed air flow ejected from the air holes of the dust removal pipe.

[0020] At the lower end of the housing of the rotating component, there are provided a bearing positioning portion, a gas blocking portion, a bearing, and an exhaust groove that are the same as those at the upper end. One rotating component is installed in the fixed rod. Dust removal pipes are provided at both ends of the rotating component. Connection frames are respectively provided at the upper and lower ends of the dust removal pipes. The connection frames are provided with through holes passing through the fixed rod and have no contact with the fixed rod. The connection frames connect the two dust removal pipes into a whole, so that the two dust removal pipes, the connection frames, and the rotating component form an integral frame. When the rotating component rotates, it drives the dust removal pipes to rotate and eject high-speed air flow. Only one rotating component needs to be connected to two dust removal pipes to achieve dust removal by ejecting gas, and the manufacturing cost is low.

[0021] The gas blocking portion includes an upper blocking portion and a lower blocking portion. The lower blocking portion is a detachable exhaust ring. The exhaust is provided with several protruding support portions and inner holes. The fixed rod can pass through the inner hole of the lower blocking portion and has no contact with the inner hole of the lower blocking portion (a clearance of 0.5 - 1 mm can be provided on one side). An exhaust gap is formed between the support portion of the exhaust ring and the upper end face of the bearing and is communicated with the exhaust groove. The upper blocking portion blocks the gap at the upper end of the bearing rotating portion, and the lower blocking portion blocks the gap at the lower end of the bearing rotating portion, so as to prevent gas from directly blowing into the inside through the gap of the bearing rotating portion and blowing out the lubricating oil of the balls inside the bearing. When the fixed rod is inserted into the bearing of the rotating component, the exhaust groove can discharge the gas entering the gap between the inner hole of the exhaust ring and the outer diameter of the fixed rod, and the rotating component rotates more smoothly. The gas discharged from the exhaust groove can blow air towards the upper end face of the bearing to remove the dust on the upper end face of the bearing, and prevent the dust from entering the gap between the inner hole of the upper blocking portion and the outer diameter of the fixed rod, realizing smooth rotation of the rotating component and being able to exhaust gas.

[0022] The inner hole of the exhaust ring of the air baffle part is provided with a raised circular boss, and the height of the boss is lower than the height of the support part, which can be lower than 0.5 - 1 mm. The setting of the boss can increase the height of the inner ring, making it more difficult for dust to enter the inner ring, and can also improve the fitting accuracy between the inner ring of the exhaust ring and the fixed rod.

[0023] Bearing positioning parts, upper baffle parts, exhaust rings, exhaust grooves, and bearings are symmetrically arranged at the lower and upper ends of the housing of the rotating part. Dust removal pipes are respectively installed at the left and right ends of the two rotating parts to form an integral rotating device.

[0024] The dust removal pipe is provided with a number of vertically arranged jet holes, and there is an included angle between the jet holes and the rotating arm; a combination of a number of vertically arranged straight jet holes and jet holes is provided in the dust removal pipe, there is an included angle between the jet holes and the rotating arm, and there may be no included angle between the straight jet holes and the rotating arm.

[0025] Sealing grooves and sealing ribs are provided in the mating contact surfaces of the front shell and the rear shell of the rotating part. When the front shell and the rear shell are buckled together, the sealing ribs can be inserted into the sealing grooves to make the sealing performance at the connection of the front shell and the rear shell better.

[0026] The beneficial effects of the present utility model are as follows: 1. The rotating component includes a housing composed of a front shell and a rear shell. Compared with an integrated housing, the structure of the front and rear shells is simple to manufacture, saving costs, convenient to use, with low costs, and having a broader sales prospect; 2. In the housing, the cooperation of an exhaust groove, a gas blocking part, and a bearing can automatically rotate and spray gas for dust removal, and can also exhaust the rotating part of the rotating device. When rotating, it is smooth and has small swing. During use, it can prevent gas and dust from directly entering the bearing or gap of the rotating component through the gap, affecting the cleaning effect; 3. The cooperation of the exhaust groove, the gas blocking part, and the bearing can prevent the lubricating oil (grease) in the bearing from being blown out easily when high-pressure gas is input into the rotating component, increasing the friction and wear of the bearing during rotation, and can also form counter blowing to prevent dust; 4. Two rotating components are connected to the connecting pipe as a whole, making the bearings between the two rotating components far apart. Even if dust removal pipes are provided on both sides of the rotating component during rotation, the swing during rotation will be small, and the smoothness and accuracy of rotation are relatively high; 5. A rough-precision bearing with a relatively large distance between the balls (or a bearing with a relatively small ball) can be installed in the rotating component. When using a rough-precision bearing, the swing of the upper and lower ends during the rotation of the rotating device will also be small; 6. The rotating component structure of this application is simple, simple and convenient in the assembly production and manufacturing process, can prevent dust from entering and affecting rotation, and is more cost-saving in manufacturing, with good use effects; 7. The upper end of the fixing rod is provided with a support shoulder formed by extrusion and contraction, which can prevent the thickness of the support shoulder from becoming thinner, has better strength during use, is not easy to break, and has better effects; 8. It can reduce the replacement frequency of the filter cartridge and the trouble of labor for personnel, improve efficiency, has good cleaning effects, and reduces the costs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present utility model will be further described below with reference to the drawings and embodiments.

[0028] Figure 1 Views of the spraying chamber and the existing filtering mechanism;

[0029] Figure 2 It is the first embodiment, an internal view of the housing of the rotating component;

[0030] Figure 3 It is the first embodiment, a view of the rotating component installed with a connecting pipe;

[0031] Figure 4 It is the first embodiment, a three-dimensional view of the rotating dust removal device;

[0032] Figure 5 It is the first embodiment, an exploded view of the rotating dust removal device;

[0033] Figure 6 It is the first embodiment, a detailed view of part A in the exploded view of the rotating dust removal;

[0034] Figure 7 It is a schematic cross-sectional view of the rotating component and the dust removal pipe;

[0035] Figure 8 It is a sectional view of the fixed rod and the sealing component;

[0036] Figure 9 It is a sectional view of the fixed rod;

[0037] Figure 10 It is a view of the rotary powder removal device installed at the upper end of the spraying chamber and the filter cartridge;

[0038] Figure 11 It is the second embodiment, a three-dimensional view of the rotary powder removal device;

[0039] Figure 12 It is the second embodiment, an exploded view of the rotary powder removal device;

[0040] Figure 13 It is the detail view at A of the exploded view of the rotary powder removal in the second embodiment;

[0041] Figure 14 It is the third embodiment, a three-dimensional view of the rotary powder removal device;

[0042] Figure 15 It is the fourth embodiment, an exploded view of the rotary component of the rotary powder removal with a housing hidden;

[0043] Figure 16 It is the fourth embodiment, a view of the exhaust ring;

[0044] Figure 17 It is the fifth embodiment, an exploded view of the rotary component;

[0045] In the figure: 1. Powder spraying chamber, 2. Powder spraying window, 3. Workpiece inlet, 4. Workpiece, 5. Negative pressure chamber, 6. Suction air pipe, 7. Fixed rod, 8. Cover, 9. Inner sleeve, 10. Outer sleeve, 11. Support frame, 12. Filter cartridge, 13. Rotary component, 14. Dust removal pipe, 15. Bearing, 07. Support shoulder, 071. External thread, 70. Air hole, 71. Through hole, 72. Card slot, 73. Snap ring, 74. Air inlet hole, 75. Air spraying hole, 76. Included angle, 130. Positioning bone, 131. Bearing positioning part, 132. Exhaust groove, 133. Lower blocking part, 134. Support bone, 135. Pipe clamping part, 136. Connecting pipe, 137. Channel, 138. Clamping part, 139. Boss, 140. Rotary arm, 141. Upper blocking part, 142. Flap, 143. Sealing groove, 144. Sealing bone. Specific embodiments

[0046] In Figure 1In the existing powder spraying and dust removal technologies shown, for example, during the powder spraying process, an air extraction and filtration mechanism needs to be set at the rear end inside the powder spraying chamber 1 to enable the air flow to flow into the powder spraying chamber 1 from the workpiece inlet 3, the workpiece outlet, and the powder spraying window 2. Only in this way can the powder ejected from the spray gun at the powder spraying window 2 not splash back inside the powder spraying chamber 1, and it can also prevent dust from flying back out from the powder spraying window 2, the workpiece inlet 3, and the workpiece outlet. The excess powder that enters the powder spraying chamber 1 and is not adhered to the surface of the workpiece 4 will be sucked to gather around the air extraction and filtration mechanism and accumulate and precipitate below the filter cartridge 12 of the filtration mechanism inside the powder spraying chamber 1. This can recycle the gathered powder and also better prevent the powder from causing pollution when flying out of the room. The air extraction and filtration mechanism plays an important role during the powder spraying process. The existing air extraction and filtration mechanism has several filter cartridges 12 set at the rear end position inside the powder spraying chamber 1. The lower part of the filter cartridge 12 is closed, and the upper end of the filter cartridge 12 is installed and fixed on the top of the powder spraying chamber 1. A negative pressure chamber 5 is set on the top of the powder spraying chamber 1, and an air suction pipe 6 is set in the negative pressure chamber 5. When the exhaust fan starts to extract air, the air suction pipe 6 and the negative pressure chamber 5 generate negative pressure suction to extract air from the filter cartridge 12. The air flow inside the powder spraying chamber 1 will flow into the filter cartridge 12. During the powder spraying process, the excess splashed powder will gather around the filter cartridge along with the air flow and precipitate around the lower part of the filter cartridge. Also, a relatively large amount of powder will be adsorbed on the filter membrane of the filter cartridge 12. However, after being used for a period of time, a relatively large amount of coating powder will be adsorbed on the filter membrane of the filter cartridge 12, blocking the pores of the entire filter cartridge 12, affecting the air flow passing through the filter cartridge 12, and unable to achieve the effect of air extraction and filtration. Then it is necessary to stop production and clean the filter cartridge 12 or replace it with a new one. And when cleaning or replacing the new filter cartridge, it will be rather troublesome. It is necessary to stop spraying, and it also requires personnel to enter the powder spraying chamber filled with coating powder, which is very inconvenient. This application provides a rotating dust removal device to automatically remove the dust adsorbed in the filter cartridge 12.

[0047] As shown in Figures 2-7 , a rotating dust removal device includes a fixed rod 7, a rotating component 13, a dust removal pipe 14, and a connecting pipe 136. A rotatable rotating component 13 is set in the fixed rod 7, and a dust removal pipe 14 is set in the rotating component 13. There are interconnected channels among the fixed rod 7, the rotating component 13, the dust removal pipe 14, and the connecting pipe 136. When high-pressure gas is input into the fixed rod 7, after the gas passes through the channels, it is ejected from the air holes of the dust removal pipe 14. The reaction force of the high-speed gas ejected from the air holes of the dust removal pipe 14 pushes the rotating component 13 to rotate. The rotating component 13 drives the dust removal pipe 14 to automatically rotate and spray high-speed air flow. When the dust-proof rotating dust removal device is inserted into the filter cartridge 12, the high-speed air flow ejected by the dust removal pipe 14 pushes the rotating device to rotate and comprehensively removes the dust adhering to the filter cartridge 12 by 360 degrees.

[0048] The rotating component 13 includes a housing composed of a front housing and a rear housing. A bearing positioning portion 131 and an air blocking portion are provided in the housing. An exhaust groove 132 for exhausting and relieving pressure is provided in the bearing positioning portion 131. A bearing 15 is installed in the bearing positioning portion 131. The air blocking portion can block the gap of the rotating part of the bearing. The structures of the front housing and the rear housing are simple to manufacture, cost-saving, and convenient to use. The outlet ends of the two exhaust grooves 132 of the front housing and the rear housing blow air towards each other, similar to a C-shaped structure or a jaw shape. The front housing and the rear housing can be, but are not limited to, composed of two mirror-image housings or housings with exactly the same structure.

[0049] Sealing grooves 143 and sealing ribs 144 are provided in the mating contact surfaces of the front housing and the rear housing of the rotating component. When the front housing and the rear housing are buckled together, the sealing ribs 144 can be inserted into the sealing grooves 143, making the connection between the front housing and the rear housing more sealed. The front housing and the rear housing can be hermetically connected and fixed as a whole by screws or the combination of screws and nuts.

[0050] The air blocking portion includes an upper blocking portion 141 and a lower blocking portion 133. The upper blocking portion 141 blocks the upper end of the gap of the rotating part of the bearing 15, and the lower blocking portion 133 blocks the lower end of the gap of the rotating part of the bearing 15, preventing gas from blowing into the inside through the gap of the rotating part of the bearing 15 and affecting rotation and blowing out the lubricating oil of the balls inside the bearing 15. When a fixing rod 7 is inserted into the bearing 15 of the rotating component 13, there will be a gap between the inner hole of the air blocking portion and the outer diameter of the fixing rod 7. When the rotating component 13 and the bearing 15 rotate, no friction will occur between the inner hole of the air blocking portion and the outer diameter of the fixing rod 7 to affect rotation. The exhaust groove 132 can discharge the gas entering the gap between the inner hole of the air blocking portion and the outer diameter of the fixing rod 7, so that the rotating component 13 can rotate more smoothly. The gas discharged from the exhaust grooves 132 of the front housing and the rear housing can also blow air towards the upper end face of the bearing 15 to remove the dust on the upper end face of the bearing 15, preventing the dust from entering the gap between the inner hole of the upper blocking portion 141 and the outer diameter of the fixing rod 7.

[0051] An air blocking portion is provided in the housing. The air blocking portion is only provided at the lower end of the bearing 15 as a lower blocking portion 133. The lower blocking portion 133 is connected to the housing as a whole or the lower blocking portion 133 is detachable. The lower blocking portion 133 can be an exhaust ring or any other type of blocking ring, retaining ring, etc.

[0052] A pipe clamping portion 135 is provided at the lower end of the housing of the rotating component 13. A connecting pipe 136 is installed in the pipe clamping portion 135. The upper end and the lower end of the connecting pipe 136 are respectively connected to the rotating component 13. Two rotating components 13 and the connecting pipe 136 are connected as a whole to form an overall rotating device. The gas entering the connecting pipe 136 will flow into the two rotating components 13 and then flow out through the air holes of the dust removal pipe 14.

[0053] The aperture of the connecting pipe 136 is larger than the inner hole of the bearing 15, and the length of the connecting pipe 136 can be selected according to actual usage requirements. During use, the clamping part 135 of the two rotating parts 13 is connected to both ends of the connecting pipe 136 as a whole, so that the bearing 15 between the two rotating parts 13 is at a relatively long distance. Even if dust removal pipes 14 are arranged on both sides of the rotating part 13 during rotation, the swing during rotation will be relatively small, and the smoothness and precision of rotation are relatively high. Due to the arrangement of the relatively long connecting pipe 136, the distance of the bearing 15 between the two rotating parts is increased, and a rough-precision bearing with a relatively large distance between the balls (or a bearing with a relatively small ball) can be installed in the rotating part 13. When using a rough-precision bearing, the swing of the upper and lower ends during the rotation of the rotating device will also be relatively small. And when using a rough-precision bearing, even if a small amount of dust enters the gap of the bearing 15 and the balls, it will not affect the smoothness of the bearing rotation. The entire rotating device only needs two bearings 15 to improve the precision and stability during rotation, save manufacturing costs, and can obtain good usage effects.

[0054] Rotating arms 140 are arranged on both sides of the rotating part 13. A channel 137 is arranged in the rotating arm 140. A clamping part 138 is arranged at the end of the rotating arm 140. A dust removal pipe 1 is arranged in the clamping part 138. The channel 137 of the rotating arm 140 communicates with the air inlet of the dust removal pipe 14. A number of air jet holes 75 are arranged in the dust removal pipe 14. The upper and lower ends of the dust removal pipe 14 are closed ends.

[0055] Blocking ribs 142 are arranged at the ends of the channels 137 of the rotating arms 140 on the left and right sides of the rotating part 13. The blocking by the blocking ribs 142 reduces the aperture at the end of the channel 137, enabling the gas to be blown into the dust removal pipe 1 more concentratedly, and making the connection stability and airtightness between the clamping part 138 and the dust removal pipe 14 better.

[0056] The fixed rod 7 can be inserted into the inner hole of the bearing 15 of the rotating part 13. When a high-pressure gas pipe is connected to the upper end of the fixed rod 7 and high-pressure gas is input, the gas enters the rotating part 13 or the connecting pipe 136 from the through hole 71 of the fixed rod 7, and then enters the dust removal pipe 14 through the channel 137 of the rotating arm 140, and is then ejected from the air jet holes 75, that is, the gas ejected from the through hole 71 can flow to the channel 137 of the rotating part 13, then enters the dust removal pipe 1 through the air inlet hole 74 of the dust removal pipe 14, and is then ejected from a number of air jet holes 75. When gas is ejected from the air holes 75, the two dust removal pipes 14 will push the rotating part 13 and the dust removal pipe 14 to rotate under the action of the gas reverse force, and the high-speed air flow ejected from the air holes 75 of the dust removal pipe 14.

[0057] A positioning bone 130 is provided in the clamping portion 138 of the rotating member 13. The positioning bone 130 can be inserted into the positioning hole of the dust removal pipe 14 for cooperation, so as to better fix the dust removal pipe 14 in the clamping portion 138, and can prevent the connection between the dust removal pipe 14 and the clamping portion 138 from loosening when the air jet holes 75 of the dust removal pipe 14 jet high-pressure gas, and can play a role in connection stability and positioning.

[0058] An included angle 76 is provided between a plurality of vertically arranged air jet holes 75 of the dust removal pipe 14 and the rotating arm 140. When the air jet holes 75 jet gas, the two dust removal pipes 14 will, under the action of the reverse force of the gas, push the rotating member 13 and the dust removal pipe 14 to rotate around the bearing 15 as the axis. The high-speed air flow ejected from the air jet holes 75 of the dust removal pipe 14 can rotate and jet-clean the filter cartridge 12, and can jet high-speed air flow from the inside to the outside of the filter cartridge 12 in an all-round way, better cleaning the paint powder attached to the filter cartridge 12. The jet-cleaning effect is good, and the cleaning is relatively clean, avoiding the paint powder from adhering to the filter cartridge and affecting the air flow. Without limitation, the value of the included angle 76 can be set to any fixed angle value between 30-35 degrees, or other angle values.

[0059] The air jet holes 75 of the dust removal pipe 14 include direct jet holes 751 and air jet holes 75. The direct jet holes 751 directly jet gas into the filter membrane of the filter cartridge to directly clean the dust in the filter membrane. The included angle 76 between the direct jet holes 751 and the rotating arm 140 can be a zero-degree angle. The distance between the direct jet holes 751 and the filter membrane is closer, and the generated jet force is stronger, and the cleaning strength and effect are better; while an included angle 76 is provided between the air jet holes 75 and the rotating arm 140 to provide rotational power and clean the filter membrane when jetting gas. The two types of air holes can be arranged vertically and alternately combined, that is, the first hole is the air jet hole 75, and there is an included angle 7 between the air jet hole 75 and the rotating arm 140, the second hole is the direct jet hole 751, and there is no included angle 7 between the direct jet hole 751 and the rotating arm 140, the third hole is the air jet hole 75, the fourth hole is the direct jet hole 751, and they are arranged and combined in sequence, or other combination methods, further improving the jet-cleaning effect during use.

[0060] A clamping groove 72 is provided below the connection between the fixing rod 7 and the rotating member 13. The clamping groove 72 cooperates with the clamping spring 73 to limit the rotating member 13 in the fixing rod 7, and can prevent the rotating member 13 from falling off downward or moving in the vertical direction. The channel 137 of the rotating arm 140 communicates with the through hole 71.

[0061] Through an innovative design, the rotating component consists of a front shell and a rear shell. The structure of the front and rear shells enables the convenient arrangement of a bearing positioning portion 131, an air blocking portion, and an exhaust groove 132 in the shell, saving costs during the manufacturing process, being simple to manufacture. The high-speed air flow ejected from the air holes 75 of the dust removal pipe 14 can comprehensively eject the high-speed air flow from the inside to the outside of the filter cartridge 12, better cleaning the paint powder, dust, etc. attached in the filter cartridge 12. The effect of the jet cleaning is good, and it is cleaned relatively cleanly, avoiding the attachment of paint powder and dust in the filter cartridge and affecting the air flow.

[0062] As shown in Figures 7-9 the fixing rod 7 is a hollow rod. A supporting shoulder 07 formed by extrusion and contraction is provided at the upper end of the fixing rod 7. Then, external threads are provided in the supporting shoulder 07, which can prevent the thickness of the supporting shoulder from becoming thinner.

[0063] During use, since the upper end of the fixing rod 7 needs to be provided with a contracted supporting shoulder 07 to cooperate with the upper end opening of the outer sleeve 10 for positioning, and external threads need to be provided in the supporting shoulder 07 to cooperate with the nut to fix the upper end of the outer sleeve 10 to the upper end of the fixing rod 7. And for the vertical fixing rod 7, a supporting shoulder 07 and external threads 071 need to be provided, it is necessary to mill and remove the thickness of the outer end face of the fixing rod 7 to form the supporting shoulder 07, which will cause the thickness of the supporting shoulder 07 to become thinner and be prone to breakage during use. If the entire fixing rod 7 is thickened, it will waste materials, increase the weight, and the cost of the milling process is high, having deficiencies. By providing a supporting shoulder 07 formed by extrusion and contraction at the upper end of the fixing rod 7, it can prevent the thickness of the supporting shoulder 07 from becoming thinner, having better strength and being not easily broken during use, with a better effect.

[0064] The fixing rod 7 includes a first section pipe and a second section pipe. The lower end of the first section pipe is inserted into the second section pipe, and the lower end of the first section pipe is connected and fixed to the second section pipe by hydraulic press extrusion and contraction to form the integral fixing rod 7. The process of connecting and fixing the first section pipe and the second section pipe by extrusion and contraction is simple, convenient and efficient during production, without welding, and can better save the manufacturing cost.

[0065] The connection between the first section pipe and the second section pipe of the fixing rod 7 is detachable, including any one of screw thread connection or snap connection. The fixing rod 7 can be disassembled, the length is reduced during transportation, which is convenient, and the installation during use is also convenient.

[0066] An internal thread can be provided in the inner hole at the end of the second section of the fixed rod 7, and the fixed rod 7 is connected and fixed to the bottom of the filter cartridge 12 by screwing with the internal thread; alternatively, an internal thread is provided at the end of the second section of the pipe and is connected and fixed to a threaded column, or a threaded column is welded to the end of the second section of the pipe, forming a fixed rod 7 with a threaded column at the end. The fixed rod 7 can be connected and fixed to the bottom of the filter cartridge 12 by connecting with the threaded column through a nut.

[0067] Optionally, but not limited to, the rotating device is installed in the second section of the pipe. A clamping groove 72 is provided at the lower end of the second section of the pipe and cooperates with a clamping spring 73 to limit the rotating member 13 in the second section of the fixed rod 7.

[0068] In Figure 10 In the illustrated embodiment, the dust-proof and powder-removing rotating device can be installed in the filter cartridge 12 of the powder spraying chamber 1 and cooperate with the sealing member to clean the paint powder adhering to the surface of the filter cartridge 12. A support frame 11 is provided at the upper end of the filter cartridge 12 in the negative pressure chamber 5 at the upper end of the powder spraying chamber 1. A hollow fixed rod 7 and a sealing member are provided at the center of the support frame 11. The upper end of the fixed rod 7 can be connected to a high-pressure air pipe, and the high-pressure air pipe can input high-pressure gas into the fixed rod 7. The gas will push the cover 8 of the sealing member downward to cover the opening at the upper end of the filter cartridge 12. The sealing member includes an outer sleeve 10 and an inner sleeve 9. The outer sleeve 10 is connected to the upper end of the fixed rod 7 by a nut. An air hole 70 is provided at the upper end of the fixed rod 7 to blow air into the outer sleeve 10. A movable inner sleeve 9 is provided inside the outer sleeve 10. A piston cover that cooperates with the inside of the outer sleeve 10 is provided at the upper end of the inner sleeve 9. The piston cover can move inside the outer sleeve 10. A cover 8 is provided at the lower end of the inner sleeve 9. When high-pressure gas is input into the air inlet of the fixed rod 7, the air jet from the air hole 70 will push the piston cover and the inner sleeve 9 downward. The downward movement of the inner sleeve 9 drives the integrally connected cover 8 to move downward to cover the opening at the upper end of the filter cartridge 12. When the gas passes through the communicating holes between the four components of the fixed rod 7, the rotating member 13, the dust removal pipe 14, and the connecting pipe 136 and is ejected from the air hole of the dust removal pipe 14, the reaction force of the high-speed gas ejected from the air hole of the dust removal pipe 14 pushes the rotating member 13 to rotate inside the filter cartridge 12. The rotating member 13 drives the dust removal pipe 14 to automatically rotate and eject high-speed air flow to clean the filter cartridge 12.

[0069] In Figures 11-13 In the second illustrated embodiment, a bearing positioning portion 131, a gas blocking portion, a bearing 15, and an exhaust groove 132, which are the same as those at the lower end, are provided at the upper end of the housing of the rotating member 13. The upper and lower rotating members 13 are connected to the dust removal pipe 1 to form an integral rotating device.

[0070] A through hole 71 communicating with the channel 137 of the rotating member 13 is provided in the fixed rod 7. The fixed rod 7 can be inserted into the bearing 15 of the rotating member 13. The through hole 71 is located at the middle position between the two bearings of the rotating member 13. Gas can enter the corresponding rotating member 13 from the through hole 71 of the fixed rod 7, then enter the dust removal pipe 14 through the channel 137 of the rotating arm 140, and then be ejected from the air jet holes 75, that is, the gas ejected from the through hole 71 can flow to the channel 137 of the rotating member 13, then enter the dust removal pipe 1 through the air inlet hole 74 of the dust removal pipe 14, and then be ejected from a plurality of air jet holes 75. When the gas is ejected from the air jet holes 75, the two dust removal pipes 14 will be pushed by the gas reverse force to drive the rotating member 13 and the dust removal pipe 14 to rotate, and the high-speed air flow ejected from the air jet holes 75 of the dust removal pipe 14.

[0071] Figure 15 As shown in the figure, a bearing positioning portion 131, a gas blocking portion, a bearing 15, and an exhaust groove 132, which are the same as those at the lower end, are provided at the upper end of the housing of the rotating member 13. A rotating member 13 is installed in the fixed rod 7. Dust removal pipes 14 are provided at both ends of the rotating member 13. Connection frames are respectively provided at the upper and lower ends of the dust removal pipes 14. The connection frames are provided with through holes passing through the fixed rod 7 and are not in contact with the fixed rod 7. The connection frames connect the two dust removal pipes 14 into a whole, so that the two dust removal pipes 14, the connection frames, and the rotating member 13 form a whole frame. When the rotating member 13 rotates, it drives the dust removal pipes 14 to rotate and eject high-speed air flow. Only one rotating member 13 needs to be connected to the dust removal pipes 14 to achieve gas jet dust removal, and the manufacturing cost is low.

[0072] In Figures 15-16 In the third embodiment shown, the rotating member 13 includes a housing composed of a front housing and a rear housing. A bearing positioning portion 131 and a gas blocking portion are provided in the housing. An exhaust groove 132 for exhaust and pressure relief is provided in the bearing positioning portion 131. A bearing 15 is installed in the bearing positioning portion 131, and the gas blocking portion can block the gap of the rotating part of the bearing.

[0073] The air blocking part includes an upper blocking part 141 and a lower blocking part 133. The lower blocking part 133 is a detachable exhaust ring. The exhaust ring is provided with a number of protruding support parts 134 and an inner hole. The fixing rod 7 can pass through the inner hole of the lower blocking part 133 and there is no contact with the inner hole of the lower blocking part 133 (there can be a clearance of 0.5 - 1 mm on one side). An exhaust gap is formed between the support part 134 of the exhaust ring and the upper end face of the bearing, which communicates with the exhaust groove 132. The upper blocking part 141 blocks the gap at the upper end of the rotating part of the bearing 15, and the lower blocking part 133 blocks the gap at the other upper end of the rotating part of the bearing 15, preventing gas from directly blowing into the inside through the gap of the rotating part of the bearing 15 and affecting rotation and blowing out the lubricating oil of the balls inside the bearing 15. When the fixing rod 7 is inserted into the bearing 15 of the rotating part 13, the exhaust groove 132 can discharge the gas entering the gap between the inner hole of the exhaust ring and the outer diameter of the fixing rod 7, making the rotation of the rotating part 13 smoother. The gas discharged from the exhaust groove 132 can blow against the upper end face of the bearing 15 to remove the dust on the upper end face of the bearing 15, preventing the dust from entering the gap between the inner hole of the upper blocking part 141 and the outer diameter of the fixing rod 7, achieving smooth rotation of the rotating part and being able to exhaust gas.

[0074] A pipe clamping part 135 is provided at the lower end of the housing of the rotating part 13. A connecting pipe 136 is installed in the pipe clamping part 135. The upper end and the lower end of the connecting pipe 136 are respectively connected to the rotating part 13. Two rotating parts 13 and the connecting pipe 136 are connected as a whole to form an integral rotating device. The gas entering the connecting pipe 136 will flow into the rotating part 13 and then flow out through the air holes of the dust removal pipe 14.

[0075] The inner hole of the exhaust ring of the air blocking part is provided with a protruding circular boss 139. The height of the boss 139 is lower than the height of the support part 134, and it can be 0.5 - 1 mm lower. The provision of the boss 139 can increase the height of the inner ring, making it more difficult for dust to enter the inner ring, and can also improve the fitting accuracy between the inner ring of the exhaust ring 133 and the fixing rod 7.

[0076] In Figure 17In the fourth embodiment shown, bearing positioning portions 131, upper blocking portions 141, exhaust rings, exhaust grooves 132, and bearings 15 are symmetrically provided at the upper and lower ends of the housing of the rotating member 13. Dust removal pipes 1 are respectively installed at the left and right ends of the two rotating members 13 to form an integral rotating device. A through hole 71 communicating with the channel 137 of the rotating member 13 is provided in the fixed rod 7. The fixed rod 7 can be inserted into the bearing 15 of the rotating member 13. The through hole 71 is located at the middle position between the two bearings of the rotating member 13. Gas can enter the corresponding rotating member 13 from the through hole 71 of the fixed rod 7, then enter the dust removal pipe 14 through the channel 137 of the rotating arm 140, and then be ejected from the air injection holes 75, that is, the gas ejected from the through hole 71 can flow to the channel 137 of the rotating member 13, then enter the dust removal pipe 1 through the air inlet hole 74 of the dust removal pipe 14, and then be ejected from a plurality of air injection holes 75. When gas is ejected from the air injection holes 75, the two dust removal pipes 14 will push the rotating member 13 and the dust removal pipe 14 to rotate under the action of the gas reverse force, and high-speed airflows are ejected from the air injection holes 75 of the dust removal pipe 14.

Claims

1. A rotary dust removal device, characterized in that: It includes a rotating component, which consists of a housing formed by a front shell and a rear shell. A bearing positioning part is provided in the housing, and a bearing is arranged in the bearing positioning part. The bearing can be connected to a fixed rod. Rotating arms are provided on both sides of the housing, and a dust removal pipe is arranged at the end of the rotating arm. A channel is provided inside the rotating arm and is communicated with the air inlet of the dust removal pipe.

2. The rotary dust removal device according to claim 1, wherein: A clamping part is arranged at the end of the rotating arm, and a dust removal pipe is arranged in the clamping part. A number of air spray holes are arranged in the dust removal pipe. The upper and lower ends of the dust removal pipe are closed ends. When the fixed rod is inserted and fitted into the inner hole of the bearing of the housing, gas is input at the upper end of the fixed rod. The gas can enter the channel of the rotating arm from the through hole of the fixed rod and then be ejected from the air spray holes of the dust removal pipe. Under the action of the reverse force of the gas, the dust removal pipe pushes the rotating component to drive the dust removal pipe to rotate.

3. The rotary dust removal device according to claim 1 or 2, characterized in that: A gas blocking part is arranged in the housing. The gas blocking part is arranged at the lower end of the bearing and is integrally connected to the housing or the gas blocking part is detachable.

4. A rotary dust removal device according to claim 1 or 2, characterized in that: A gas blocking part is arranged in the housing. The gas blocking part includes an upper blocking part and a lower blocking part. The upper blocking part blocks the upper end of the gap of the rotating part of the bearing, and the lower blocking part blocks the lower end of the gap of the rotating part of the bearing.

5. The rotary dust removal device according to claim 1 or 2, characterized in that: A gas blocking part is arranged in the housing. The gas blocking part includes an upper blocking part and a lower blocking part. The lower blocking part is an exhaust ring. The exhaust ring is provided with a number of protruding supporting parts and an inner hole. The fixed rod can pass through the inner hole of the exhaust ring and there is no contact between the fixed rod and the inner hole of the exhaust ring. An exhaust gap is formed between the supporting part of the exhaust ring and the upper end face of the bearing. The upper blocking part blocks the upper end of the gap of the rotating part of the bearing, and the lower blocking part blocks the lower end of the gap of the rotating part of the bearing.

6. The rotary dust removal device according to any one of claims 1-2, characterized in that: An exhaust groove for exhausting pressure is arranged in the bearing positioning part of the housing. The exhaust groove can discharge the gas entering the gap between the inner hole of the gas blocking part and the outer diameter of the fixed rod. The air outlet ends of the exhaust grooves in the front shell and the rear shell face each other for exhaust, forming a blowing against each other.

7. The rotary dust removal device according to claim 6, characterized in that: A pipe clamping part is arranged at the lower end of the housing. A connecting pipe is installed in the pipe clamping part. The upper and lower ends of the connecting pipe are respectively connected to the housing. The two housings and the connecting pipe are integrally connected to form an integral rotating device.

8. The rotary dust removal device according to claim 1 or 2, characterized in that: A supporting shoulder formed by extrusion and contraction is arranged at the upper end of the fixed rod. External threads are arranged in the supporting shoulder. The fixed rod includes a first section of pipe and a second section of pipe. The first section of pipe and the second section of pipe are integrally connected and fixed by extrusion and contraction fastening fit or screw connection or snap connection.

9. The rotating dust removal device according to claim 6, characterized in that: The upper end of the housing of the rotating component is provided with the same bearing positioning part, gas blocking part, bearing, exhaust groove as the lower end. An integral rotating device is formed by connecting one rotating component to the dust removal pipe or two rotating components to the dust removal pipe.

10. The rotating dust removal device according to claim 6, wherein: The upper end of the housing of the rotating component is provided with the same bearing positioning part, gas blocking part, bearing, exhaust groove, exhaust ring as the lower end. An integral rotating device is formed by connecting one rotating component to the dust removal pipe or two rotating components to the dust removal pipe.

11. The rotary dust removal device according to claim 1 or 2, characterized in that: The dust removal pipe is provided with a number of vertically arranged air spray holes. An included angle is provided between the air spray holes and the rotating arm or a combination of straight spray holes and air spray holes is arranged in the dust removal pipe.

12. The rotary dust removal device according to claim 1 or 2, characterized in that: A sealing groove and a sealing rib are provided in the mating contact surface of the front shell and the rear shell of the rotating component. When the front shell and the rear shell are buckled with each other, the sealing rib can be inserted into the sealing groove, so that the sealing performance at the connection of the front shell and the rear shell is better.

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