Adsorption fan structure for waste gas treatment

Abstract

The invention discloses an adsorption fan structure for waste gas treatment. The draught fan comprises a draught fan shell, an impeller set is installed in the draught fan shell and rotationally connected with the draught fan shell, an air inlet and an air outlet are formed in the draught fan shell, an air inlet pipe is installed on the impeller set and communicated with the air inlet through an air guide pipe, a filter screen plate is installed in the air guide pipe, and an air outlet is formed in the air guide pipe. And the filter screen plate is detachably connected with the air guide pipe. The waste gas treatment device has the beneficial effects that the waste gas treatment efficiency is improved; the convenience of cleaning the filter screen plate is improved; the structure is simple and installation is convenient; the air tightness is improved, the situation of waste gas leakage can be avoided, and the conveying efficiency of waste gas is well guaranteed; control is convenient, and the automation degree is high; the mounting stability of the filter screen plate is improved; the good relative rotation efficiency is also ensured while the air tightness is ensured; the transmission efficiency is high, noise is low, transmission is stable, and working stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to waste gas treatment, and in particular to an adsorption fan structure for waste gas treatment. Background Art

[0002] With the development of the times, industrial development is becoming more and more rapid. At the same time, some problems have also followed. There are more and more pollution sources with polluting functions such as waste gas and sewage generated by industrial production, which have a greater impact on the environment.

[0003] The role of the adsorption fan in the waste gas treatment process is to introduce waste gas containing organic matter into the activated carbon adsorption bed, remove organic matter in the waste gas through the adsorption effect of activated carbon, and the purified gas is discharged through the fan to ensure that the waste gas can effectively pass through the activated carbon layer, thereby improving the purification efficiency.

[0004] The existing suction mechanism generally has a filter plate fixedly connected to the suction port to perform initial filtration on the exhaust gas. After long-term use of the filter plate, many particles will adhere to the inner wall of the filter hole. If it is not cleaned regularly, the filter net is likely to be blocked, resulting in a decrease in suction efficiency. However, since the filter plates are mostly fixedly connected, it is very inconvenient to clean them.

[0005] In summary, there is currently a need for an adsorption fan structure for waste gas treatment that is convenient for cleaning the filter plate. Summary of the invention

[0006] The present invention aims to overcome the disadvantage that the filter plate in the prior art is very inconvenient to clean, and provides an adsorption fan structure for waste gas treatment that is convenient for cleaning the filter plate.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: An adsorption fan structure for waste gas treatment comprises a fan housing, an impeller group is installed inside the fan housing, the impeller group and the fan housing are rotatably connected, the fan housing is provided with an air inlet and an air outlet, an air inlet pipe is installed on the impeller group, the air inlet pipe and the air inlet are connected through an air duct, a filter screen is installed inside the air duct, and the filter screen and the air duct are detachably connected.

[0008] When working, the impeller group in the fan housing rotates, generating negative pressure at the air inlet, so that the exhaust gas is sucked to the impeller group through the air inlet, air duct and air inlet pipe in turn, and driven by the impeller group, the exhaust gas is sent to the air outlet for discharge, and then enters the activated carbon adsorption bed. The exhaust gas is initially filtered by installing a filter plate inside the air duct, which improves the exhaust gas treatment efficiency. The filter plate and air duct are detachable, so that the filter plate can be removed from the air duct for cleaning, which improves the convenience of cleaning.

[0009] Preferably, the impeller assembly includes a rotating shaft, the rotating shaft is rotatably connected to the fan housing, a shaft disk is sleeved on the outer side of the rotating shaft, the shaft disk is fixedly connected to the rotating shaft, a wheel cover is fixed on the shaft disk, a plurality of blades are fixed on the inner wall of the wheel cover, the blades are evenly distributed on the outer side of the rotating shaft in a ring shape, an air inlet is also provided on the side wall of the wheel cover, the blades are located on the outer side of the air inlet, one end of the air inlet pipe is fixed at the air inlet, the other end of the air inlet pipe is connected to one end of the air guide pipe, the other end of the air guide pipe is installed at the air inlet and the two are sealed and fixedly connected. When working, the rotating shaft rotates, driving the shaft disk and the blades thereon to rotate, generating negative pressure at the air inlet, so that the exhaust gas is sucked into the wheel cover through the air inlet, the air guide pipe and the air inlet pipe in turn, and the exhaust gas is sent to the air outlet under the guidance of the blades for discharge, thereby entering the activated carbon adsorption bed. The air duct is fixed to the air inlet by bolts, with a simple structure and easy installation. The connection between the air duct and the air inlet is sealed by a sealing gasket to avoid exhaust gas leakage.

[0010] Preferably, the outer side of the air duct is sleeved with a transmission sleeve, the transmission sleeve and the air duct are sealed and rotatably connected, the outer diameter of the transmission sleeve matches the inner diameter of the air inlet pipe, a clamping block is fixed on the outer wall of the transmission sleeve, a clamping groove matching the clamping block is provided on the side wall of the air inlet pipe, an annular air port is provided on the outer wall of the transmission sleeve, an annular expansion bag is sealed and connected to the annular air port, and an annular bag groove matching the annular expansion bag is provided on the inner wall of the air duct. During installation, the clamping block on the transmission sleeve is clamped in the clamping groove on the air inlet pipe, and the position of the annular bag groove on the air inlet pipe is directly opposite to the position of the annular expansion bag on the transmission sleeve. When the impeller group rotates, the transmission sleeve on the outside of the air guide pipe will rotate together with the air inlet pipe, which effectively avoids friction loss in the air inlet pipe and plays a role in protecting the air inlet pipe. At the same time, the annular air port will automatically inflate the annular expansion bag, so that the annular expansion bag is compressed to expand outward and tightly against the annular bag groove, thereby improving the air tightness between the transmission sleeve and the air inlet pipe, avoiding exhaust gas leakage from the gap between the transmission sleeve and the air inlet pipe, and well ensuring the exhaust gas transportation efficiency.

[0011] Preferably, a bracket is provided at the port of the air duct near one end of the air inlet pipe, the filter plate is mounted on the bracket and is detachably connected thereto, an annular cavity is provided inside the transmission sleeve, the annular air port is placed on the outer ring wall of the annular cavity, a piston ring is sleeved inside the annular cavity and is slidably and sealedly connected thereto, the annular air port is located between the piston ring and the bracket, the piston ring and the bracket are fixedly connected by a connecting rod, a connecting rod through hole matching the connecting rod is provided on the end wall of the annular cavity, the connecting rod is placed in the connecting rod through hole and is slidably and sealably connected thereto, and a reset spring is provided between the end wall of the annular cavity and the end face of the piston ring. During the exhaust gas transportation process, the filter screen in the air duct will move toward one side of the air inlet pipe under the impact of the exhaust gas. When the filter screen moves, it will drive the bracket and the connecting rod on it to move synchronously, and then drive the piston ring on the connecting rod to move toward the direction of the annular air port. At this time, the air in the annular cavity and close to the annular air port is compressed, so that the annular expansion bag at the annular air port is automatically inflated and tightly pressed against the annular bag groove, thereby improving the air tightness between the transmission sleeve and the air inlet pipe, convenient control, and high degree of automation. The reset spring and the automatic reset function of the piston ring enable the annular expansion bag to automatically deflate when stopping work, so that the transmission sleeve and the air inlet pipe can be disassembled and separated when maintaining the equipment.

[0012] Preferably, a plurality of axial slide grooves are provided on the inner wall of the air guide tube, and the axial slide grooves are distributed in an annular manner with the central axis of the air guide tube as the center, and a sliding block is provided at the axial slide groove, one end of the sliding block is installed in the axial slide groove and is slidably connected with the axial slide groove, and a return spring 2 is provided between the end wall of the axial slide groove and the end face of the sliding block, and the other end of the sliding block is located outside the axial slide groove and a limit block is fixed on it, and a support rod is fixed on the bracket, and a center hole matching the support rod is provided at the center position of the filter screen plate, and the filter screen plate is sleeved on the support rod through the center hole and rotatably connected with the support rod, and a limiting plate 1 is fixed on the side wall of the support rod, and a limiting plate 2 is installed on the end face of the support rod, and the limiting plate 1 and the limiting plate 2 are respectively placed on both sides of the filter screen plate, and the limiting plate 2 and the support rod are fixedly connected by threads. During installation, align the limit groove on the filter screen plate with the limit block on the slider, and align the center hole on the filter screen plate with the end of the support rod, then put the filter screen plate into the air duct, so that the center hole on the filter screen plate is sleeved on the support rod, and the limit groove on the filter screen plate is clamped with the limit block on the slider, and then tighten the limit plate 2 on the end face of the support rod, so that the installation and fixation of the filter screen plate can be completed, with a simple structure and convenient operation; during disassembly, only the limit plate 2 on the end face of the support rod needs to be unscrewed to pull the filter screen plate out of the air duct, with a simple structure and convenient operation. The cooperation of the limit plate 1 and the limit plate 2 plays an axial limiting role on the support rod, preventing the filter screen plate from being relatively offset on the support rod. The cooperation of the limit groove and the limit block can prevent the filter screen plate from being deflected in the air duct, thereby improving the installation stability of the filter screen plate. The cooperation design of the slider and the guide groove can guide the movement of the filter screen plate and the bracket, thereby improving the movement stability. The second return spring can automatically return the slider.

[0013] Preferably, a sealing ring is provided between the air duct and the transmission sleeve, a sealing ring installation groove 1 is provided on the inner side wall of the transmission sleeve, the outer side of the sealing ring is installed in the sealing ring installation groove 1 and fixedly connected thereto, a sealing ring installation groove 2 is provided on the outer side wall of the air duct, the inner side of the sealing ring is placed in the sealing ring installation groove 2 and is connected thereto in a sealed rotation manner, an annular oil chamber is provided on the inner side of the air duct, the annular oil chamber is located on the inner side of the sealing ring installation groove 2 and the two are connected through an oil guide channel, and an end wall at one end of the annular oil chamber and the outer surface of the air duct are connected through an oil injection channel. The design of the sealing ring improves the air tightness between the air duct and the transmission sleeve, and prevents exhaust gas from leaking from the gap between the air duct and the transmission sleeve. The lubricating oil enters the annular oil chamber through the oil injection channel, and penetrates into the sealing ring installation groove 2 through the oil guide channel, which greatly reduces the friction between the sealing ring and the inner wall of the sealing ring installation groove 2, and ensures good relative rotation efficiency while ensuring air tightness.

[0014] Preferably, an axial movable annular groove is provided on the inner wall of the oil injection channel, the axial movable annular groove and the axial sliding groove are respectively located on both sides of the annular oil cavity, a movable plate is installed in the axial movable annular groove, the movable plate and the axial movable annular groove are sealingly and slidingly connected, a return spring 3 is provided between the end wall of the axial movable annular groove and the end face of the movable plate, an oil through hole is provided on the movable plate, a movable rod is provided in the oil injection channel, the rod diameter of the movable rod is smaller than the aperture of the oil through hole, one end of the movable rod passes through the oil through hole and a plug is fixed thereon, the width of the plug is larger than the aperture of the oil through hole, a movable rod through hole matching the movable rod is provided between the end wall of the other end of the annular oil cavity and the end wall of one of the axial sliding grooves, the other end of the movable rod passes through the movable rod through hole and is fixed on the slider. In the natural state, the movable plate is pressed against the plug under the elastic force of the return spring 3, and the oil through hole on the movable plate is blocked by the plug at this time, which can prevent the leakage of lubricating oil. When filling oil, the lubricating oil is pushed into the oil filling channel under the action of external pressure, and pushes the movable plate in the axial movable ring groove to move away from the plug. At this time, the oil hole is exposed, and the lubricating oil can be injected into the annular oil cavity through the oil hole. During the exhaust gas transportation process, the filter plate in the air guide pipe will move toward one side of the air inlet pipe under the impact of the exhaust gas. When the filter plate moves, it will drive the slider and the movable rod on it to move synchronously, and then drive the plug on the movable rod to push the movable plate together toward the direction of the annular oil cavity. At this time, the air in the annular oil cavity is compressed, and the lubricating oil will be further pushed into the second sealing ring installation groove under the action of air pressure, thereby ensuring that the lubricating oil can fully lubricate the sealing ring and the second sealing ring installation groove when the fan is in working condition.

[0015] Preferably, it also includes a chassis, the fan housing is fixed on the chassis, a motor and a shaft frame are also fixed on the chassis, the shaft is mounted on the shaft frame and is rotatably connected thereto, a motor shaft is provided on the motor, a housing through hole is provided on the side wall of the fan housing, one end of the shaft passes through the housing through hole and is placed inside the fan housing, the impeller assembly is installed at one end of the shaft, and the other end of the shaft and the end of the motor shaft are connected by a belt drive. During operation, the motor shaft on the motor rotates, and the shaft is driven to rotate synchronously by the belt, thereby driving the impeller assembly in the fan housing to rotate, so that the exhaust gas is introduced into the activated carbon adsorption bed through the fan housing. The motor shaft and the shaft are driven by a belt, which has the advantages of high transmission efficiency, low noise, and smooth transmission, thereby improving working stability.

[0016] Preferably, a motor pulley is fixed at the end of the motor shaft, one side of the belt is sleeved on the motor pulley, a shaft pulley is fixed at the other end of the rotating shaft, and the other side of the belt is sleeved on the shaft pulley. During installation, the motor pulley and the impeller shaft pulley are first installed and fixed on the motor shaft and the motor pulley respectively, and then the two sides of the belt are sleeved on the motor pulley and the impeller shaft pulley respectively. The structure is simple and the installation is convenient.

[0017] Preferably, a sealing cover is provided at the through hole of the housing, and the sealing cover is placed on the outer side wall of the fan housing and installed at the port of the through hole of the housing. The sealing cover is sleeved on the rotating shaft and is connected to it in a sealed rotation. The fan housing is also provided with a plurality of L-shaped pressure plates, and the L-shaped pressure plates are distributed in a ring shape around the sealing cover. The end of one of the side edges of the L-shaped pressure plate is fixed on the outer side wall of the fan housing. The sealing cover is placed between the other side edge of the L-shaped pressure plate and the outer side wall of the fan housing, and the connection between the two side edges of the L-shaped pressure plate is transitioned through a rounded corner. The connection between the rotating shaft and the fan housing is sealed by the sealing cover, which improves the airtight effect. After the sealing cover is installed, it is fixed by pressing the other side edge of the L-shaped pressure plate against the sealing cover. The structure is simple and easy to install and disassemble.

[0018] The beneficial effects of the present invention are: improving the waste gas treatment efficiency; improving the convenience of cleaning the filter screen; simple structure and easy installation; improving the air tightness, avoiding the occurrence of waste gas leakage, and well ensuring the waste gas transportation efficiency; convenient control and high degree of automation; improving the installation stability of the filter screen; ensuring good relative rotation efficiency while ensuring air tightness; high transmission efficiency, low noise, smooth transmission, and improved working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention; Figure 2 It is a left side view of the present invention; Figure 3 yes Figure 2 The enlarged view of point A in the middle; Figure 4 It is the connection diagram of the air inlet pipe and the air guide pipe; Figure 5 yes Figure 4 Enlarged view of the middle BB; Figure 6 yes Figure 5 Enlarged view of point C in the middle; Figure 7 yes Figure 5 The enlarged view of point D in the middle; Figure 8 yes Figure 5 Enlarged view of point E in the middle.

[0020] In the figure: 1. chassis, 2. fan housing, 3. shaft frame, 4. shaft, 5. housing through hole, 6. air inlet, 7. air outlet, 8. motor, 9. motor shaft, 10. belt, 11. sealing cover, 12. L-shaped pressure plate, 13. air inlet pipe, 14. air guide pipe, 15. filter screen, 16. shaft disc, 17. wheel cover, 18. blade, 19. air inlet, 20. transmission sleeve, 21. block, 22. slot, 23. annular air port, 24. annular expansion bag, 25. annular bag groove, 26. bracket, 27. annular cavity, 28. piston ring, 29. connecting rod, 30. connecting rod through hole, 31. return spring 1, 32. axial slide groove, 33. slider, 34. Return spring 2, 35. Limit block, 36. Limit groove, 37. Support rod, 38. Center hole, 39. Limit plate 1, 40. Limit plate 2, 41. Sealing ring, 42. Sealing ring mounting groove 1, 43. Sealing ring mounting groove 2, 44. Annular oil chamber, 45. Oil guide channel, 46. Oil filling channel, 47. Axial movable ring groove, 48. Movable plate, 49. Return spring 3, 50. Oil through hole, 51. Movable rod, 52. Movable rod through hole, 53. Motor pulley, 54. Rotating shaft pulley, 55. Plug. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1 and Figure 2 In the described embodiment, an adsorption fan structure for waste gas treatment includes a fan housing 2, an impeller group is installed inside the fan housing 2, the impeller group and the fan housing 2 are rotatably connected, the fan housing 2 is provided with an air inlet 6 and an air outlet 7, an air inlet pipe 13 is installed on the impeller group, the air inlet pipe 13 and the air inlet 6 are connected through an air duct 14, a filter screen plate 15 is installed inside the air duct 14, and the filter screen plate 15 and the air duct 14 are detachably connected.

[0023] like Figure 2 As shown, the impeller assembly includes a rotating shaft 4, which is rotatably connected to the fan housing 2. A shaft disc 16 is sleeved on the outer side of the rotating shaft 4, and the shaft disc 16 is fixedly connected to the rotating shaft 4. A wheel cover 17 is fixed on the shaft disc 16, and a plurality of blades 18 are fixed on the inner wall of the wheel cover 17. The blades 18 are evenly distributed on the outer side of the rotating shaft 4 in a ring shape. An air inlet 19 is also provided on the side wall of the wheel cover 17, and the blades 18 are located on the outer side of the air inlet 19. One end of the air inlet pipe 13 is fixed at the air inlet 19, and the other end of the air inlet pipe 13 is connected to one end of the air guide pipe 14. The other end of the air guide pipe 14 is installed at the air inlet 6 and the two are sealed and fixedly connected.

[0024] like Figure 4 and Figure 5 As shown, the outer side of the air duct 14 is sleeved with a transmission sleeve 20, the transmission sleeve 20 and the air duct 14 are sealed and rotatably connected, the outer diameter of the transmission sleeve 20 matches the inner diameter of the air inlet pipe 13, a clamping block 21 is fixed on the outer wall of the transmission sleeve 20, and a clamping groove 22 matching the clamping block 21 is provided on the side wall of the air inlet pipe 13, an annular air port 23 is provided on the outer wall of the transmission sleeve 20, an annular expansion bag 24 is sealed and connected at the annular air port 23, and an annular bag groove 25 matching the annular expansion bag 24 is provided on the inner wall of the air duct 14.

[0025] like Figure 5 and Figure 6 As shown, a bracket 26 is provided at the port of the air guide 14 near one end of the air inlet pipe 13, and the filter plate 15 is mounted on the bracket 26 and detachably connected thereto. An annular cavity 27 is provided inside the transmission sleeve 20, and the annular air port 23 is placed on the outer ring wall of the annular cavity 27. A piston ring 28 is sleeved inside the annular cavity 27 and connected thereto in a sliding and sealing manner. The annular air port 23 is located between the piston ring 28 and the bracket 26, and the piston ring 28 and the bracket 26 are fixedly connected by a connecting rod 29. A connecting rod through hole 30 matching the connecting rod 29 is provided on the end wall of the annular cavity 27, and the connecting rod 29 is placed in the connecting rod through hole 30 and connected thereto in a sliding and sealing manner. A return spring 31 is provided between the end wall of the annular cavity 27 and the end face of the piston ring 28.

[0026] like Figure 5 , Figure 7 and Figure 8 As shown, a plurality of axial slots 32 are provided on the inner wall of the air duct 14, and the axial slots 32 are distributed in a ring shape with the central axis of the air duct 14 as the center. A slider 33 is provided at the axial slot 32, one end of the slider 33 is installed in the axial slot 32 and is slidably connected thereto, a return spring 2 34 is provided between the end wall of the axial slot 32 and the end surface of the slider 33, and the other end of the slider 33 is located outside the axial slot 32 and fixed with a limit block 35, and the edge of the filter screen plate 15 is provided with a limit block A limit groove 36 matching with the support rod 35 is fixed on the bracket 26. A support rod 37 is fixed on the bracket 26. A center hole 38 matching with the support rod 37 is provided at the center position of the filter screen plate 15. The filter screen plate 15 is sleeved on the support rod 37 through the center hole 38 and is rotatably connected thereto. A limit plate 1 39 is fixed on the side wall of the support rod 37. A limit plate 2 40 is installed on the end surface of the support rod 37. The limit plate 1 39 and the limit plate 2 40 are respectively placed on both sides of the filter screen plate 15, and the limit plate 2 40 and the support rod 37 are fixedly connected by threads.

[0027] like Figure 5 and Figure 8As shown, a sealing ring 41 is provided between the air duct 14 and the transmission sleeve 20, a sealing ring mounting groove 1 42 is provided on the inner side wall of the transmission sleeve 20, the outer side of the sealing ring 41 is installed in the sealing ring mounting groove 1 42 and is fixedly connected thereto, a sealing ring mounting groove 2 43 is provided on the outer side wall of the air duct 14, the inner side of the sealing ring 41 is placed in the sealing ring mounting groove 2 43 and is sealingly rotatably connected thereto, an annular oil chamber 44 is provided on the inner side of the air duct 14, the annular oil chamber 44 is located on the inner side of the sealing ring mounting groove 2 43 and the two are connected through an oil guide channel 45, and an oil injection channel 46 is provided between the end wall of one end of the annular oil chamber 44 and the outer surface of the air duct 14.

[0028] like Figure 5 and Figure 8 As shown, an axial movable annular groove 47 is provided on the inner wall of the oil injection channel 46, and the axial movable annular groove 47 and the axial sliding groove 32 are respectively located on both sides of the annular oil chamber 44, and a movable plate 48 is installed in the axial movable annular groove 47, and the movable plate 48 and the axial movable annular groove 47 are sealed and slidably connected, and a return spring 49 is provided between the end wall of the axial movable annular groove 47 and the end surface of the movable plate 48, and an oil through hole 50 is provided on the movable plate 48, and a movable rod 51 is provided in the oil injection channel 46, and the rod diameter of the movable rod 51 is smaller than the aperture of the oil through hole 50, one end of the movable rod 51 passes through the oil through hole 50 and a plug 55 is fixed thereon, and the width of the plug 55 is greater than the aperture of the oil through hole 50, and a movable rod through hole 52 matching the movable rod 51 is provided between the end wall of the other end of the annular oil chamber 44 and the end wall of one of the axial sliding grooves 32, and the other end of the movable rod 51 passes through the movable rod through hole 52 and is fixed on the slider 33.

[0029] like Figure 1 and Figure 2 As shown, it also includes a chassis 1, a fan housing 2 is fixed on the chassis 1, a motor 8 and a rotating shaft frame 3 are also fixed on the chassis 1, a rotating shaft 4 is installed on the rotating shaft frame 3 and is rotatably connected thereto, a motor shaft 9 is arranged on the motor 8, a housing through hole 5 is arranged on the side wall of the fan housing 2, one end of the rotating shaft 4 passes through the housing through hole 5 and is placed inside the fan housing 2, an impeller group is installed at one end of the rotating shaft 4, and the other end of the rotating shaft 4 and the end of the motor shaft 9 are connected through a belt 10 for transmission.

[0030] like Figure 1 and Figure 2 As shown, a motor pulley 53 is fixed to the end of the motor shaft 9, one side of the belt 10 is sleeved on the motor pulley 53, and a rotating shaft pulley 54 is fixed to the other end of the rotating shaft 4, and the other side of the belt is sleeved on the rotating shaft pulley 54.

[0031] like Figure 3As shown, a sealing cover 11 is provided at the shell through hole 5, and the sealing cover 11 is placed on the outer side wall of the fan shell 2 and installed at the port of the shell through hole 5. The sealing cover 11 is sleeved on the rotating shaft 4 and is sealed and rotatably connected thereto. A plurality of L-shaped pressure plates 12 are also provided on the fan shell 2, and the L-shaped pressure plates 12 are distributed in a ring shape around the sealing cover 11. The end of one side of the L-shaped pressure plate 12 is fixed on the outer side wall of the fan shell 2, and the sealing cover 11 is placed between the other side of the L-shaped pressure plate 12 and the outer side wall of the fan shell 2, and the connection between the two sides of the L-shaped pressure plate 12 is transitioned through a rounded corner.

[0032] When the fan is working, the motor shaft 9 on the motor 8 rotates, and the rotating shaft 4 is driven to rotate synchronously through the belt 10, thereby driving the shaft disk 16 and the blades 18 thereon to rotate, generating negative pressure at the air inlet 6, so that the exhaust gas is sucked into the wheel cover 17 through the air inlet 6, the air duct 14 and the air inlet pipe 13 in sequence (the exhaust gas will be preliminarily filtered when passing through the filter screen 15 in the air duct 14), and under the guidance of the blades 18, the exhaust gas is sent to the air outlet 7 for discharge, thereby entering the activated carbon adsorption bed.

[0033] During installation, align the limiting groove 36 on the filter screen plate 15 with the limiting block 35 on the slider 33, and align the center hole 38 on the filter screen plate 15 with the end of the support rod 37, then put the filter screen plate 15 into the air duct 14, so that the center hole 38 on the filter screen plate 15 is sleeved on the support rod 37, and the limiting groove 36 on the filter screen plate 15 is clamped with the limiting block 35 on the slider 33, and then tighten the limiting plate 2 40 on the end face of the support rod 37 to complete the installation and fixation of the filter screen plate 15; when disassembling and cleaning, only the limiting plate 2 40 on the end face of the support rod 37 needs to be unscrewed to pull the filter screen plate 15 out of the air duct 14.

[0034] When the impeller assembly rotates, the transmission sleeve 20 on the outside of the air duct 14 will rotate with the air inlet pipe 13, which effectively avoids the friction loss of the air inlet pipe 13, and the air duct 14 and the transmission sleeve 20 will rotate relative to each other. The air duct 14 and the transmission sleeve 20 are sealed by the sealing ring 41, and the sealing ring 41 is automatically lubricated by the lubricating oil in the annular oil chamber 44, which ensures air tightness and good relative rotation efficiency. In the natural state, the movable plate 48 is pressed against the plug 55 under the elastic force of the reset spring 3 49, and the oil hole 50 on the movable plate 48 is blocked by the plug 55 to avoid leakage of lubricating oil; when filling oil, the lubricating oil is pushed into the oil filling channel 46 under the action of external pressure, and pushes the movable plate 48 in the axial movable ring groove 47 to move in the direction away from the plug 55, and the oil hole 50 is exposed at this time, and the lubricating oil can be injected into the annular oil chamber 44 through the oil hole 50.

[0035] During the exhaust gas transportation process, the filter screen plate 15 in the air guide 14 will move toward one side of the air inlet 13 under the impact of the exhaust gas. When the filter screen plate 15 moves, on the one hand, it will drive the bracket 26 and the connecting rod 29 thereon to move synchronously, and then drive the piston ring 28 on the connecting rod 29 to move toward the direction of the annular air port 23. At this time, the air in the annular cavity 27 and close to the annular air port 23 is compressed, so that the annular expansion bag 24 at the annular air port 23 is automatically inflated and tightly pressed against the annular bag groove 25, thereby improving The air tightness between the transmission sleeve 20 and the air inlet pipe 13 will, on the other hand, drive the slider 33 and the movable rod 29 thereon to move synchronously, thereby driving the plug 55 on the movable rod 29 to push the movable plate 48 to move toward the direction of the annular oil chamber 44. At this time, the air in the annular oil chamber 44 is compressed, and the lubricating oil in the annular oil chamber 44 will be further pushed into the sealing ring mounting groove 43 under the action of air pressure, thereby ensuring that the lubricating oil can fully lubricate the sealing ring 41 and the sealing ring mounting groove 43 when the fan is in working condition.

Claims

1. An adsorption fan structure for waste gas treatment, characterized in that: The invention comprises a fan housing (2), an impeller assembly being installed inside the fan housing (2), the impeller assembly being rotatably connected to the fan housing (2), an air inlet (6) and an air outlet (7) being provided on the fan housing (2), an air inlet pipe (13) being installed on the impeller assembly, the air inlet pipe (13) and the air inlet (6) being connected via an air guide pipe (14), a filter screen plate (15) being installed inside the air guide pipe (14), and the filter screen plate (15) and the air guide pipe (14) being detachably connected.

2. The adsorption fan structure for waste gas treatment according to claim 1 is characterized in that: The impeller assembly comprises a rotating shaft (4), wherein the rotating shaft (4) is rotatably connected to a fan housing (2), a shaft disc (16) is sleeved on the outer side of the rotating shaft (4), the shaft disc (16) and the rotating shaft (4) are fixedly connected, a wheel cover (17) is fixed on the shaft disc (16), a plurality of blades (18) are fixed on the inner wall of the wheel cover (17), the blades (18) are evenly distributed on the outer side of the rotating shaft (4) in an annular shape, an air inlet (19) is further provided on the side wall of the wheel cover (17), the blades (18) are located on the outer side of the air inlet (19), one end of the air inlet pipe (13) is fixed to the air inlet (19), the other end of the air inlet pipe (13) is connected to one end of the air guide pipe (14), the other end of the air guide pipe (14) is installed at the air inlet (6), and the two are sealed and fixedly connected.

3. The adsorption fan structure for waste gas treatment according to claim 2 is characterized in that: The outer side of the air guide pipe (14) is sleeved with a transmission sleeve (20), the transmission sleeve (20) and the air guide pipe (14) are sealed and rotatably connected, the outer diameter of the transmission sleeve (20) matches the inner diameter of the air inlet pipe (13), a clamping block (21) is fixed on the outer side wall of the transmission sleeve (20), a clamping groove (22) matching the clamping block (21) is provided on the side wall of the air inlet pipe (13), an annular air port (23) is provided on the outer side wall of the transmission sleeve (20), an annular expansion bag (24) is sealed and connected to the annular air port (23), and an annular bag groove (25) matching the annular expansion bag (24) is provided on the inner wall of the air guide pipe (14).

4. The adsorption fan structure for waste gas treatment according to claim 3 is characterized in that: A bracket (26) is provided at a port of the air guide pipe (14) near one end of the air inlet pipe (13); the filter screen plate (15) is mounted on the bracket (26) and is detachably connected thereto; an annular cavity (27) is provided inside the transmission sleeve (20); the annular air port (23) is disposed on an outer ring wall of the annular cavity (27); a piston ring (28) is sleeved inside the annular cavity (27) and is slidably and sealably connected thereto; the annular air port (23) is located between the piston ring (28) and the bracket (26); the piston ring (28) and the bracket (26) are fixedly connected via a connecting rod (29); a connecting rod through hole (30) matching the connecting rod (29) is provided on the end wall of the annular cavity (27); the connecting rod (29) is disposed in the connecting rod through hole (30) and is slidably and sealably connected thereto; a return spring (31) is provided between the end wall of the annular cavity (27) and an end face of the piston ring (28).

5. The adsorption fan structure for waste gas treatment according to claim 4 is characterized in that: The inner wall of the air guide pipe (14) is provided with a plurality of axial slide grooves (32), the axial slide grooves (32) being distributed in a ring shape with the central axis of the air guide pipe (14) as the center, a slider (33) being provided at the axial slide groove (32), one end of the slider (33) being installed in the axial slide groove (32) and being slidably connected thereto, a second return spring (34) being provided between the end wall of the axial slide groove (32) and the end surface of the slider (33), the other end of the slider (33) being located outside the axial slide groove (32) and having a limit block (35) fixed thereon, and a spring (34) matching the limit block (35) being provided at the edge of the filter screen plate (15). A limiting groove (36) is provided on the bracket (26), a support rod (37) is fixed on the bracket (26), a center hole (38) matching the support rod (37) is provided at the center position of the filter screen plate (15), the filter screen plate (15) is sleeved on the support rod (37) through the center hole (38) and is rotatably connected thereto, a limiting plate 1 (39) is fixed on the side wall of the support rod (37), a limiting plate 2 (40) is installed on the end surface of the support rod (37), the limiting plate 1 (39) and the limiting plate 2 (40) are respectively placed on two sides of the filter screen plate (15), and the limiting plate 2 (40) and the support rod (37) are fixedly connected by threads.

6. The adsorption fan structure for waste gas treatment according to claim 5 is characterized in that: A sealing ring (41) is provided between the air guide pipe (14) and the transmission sleeve (20); a sealing ring mounting groove (42) is provided on the inner side wall of the transmission sleeve (20); the outer side of the sealing ring (41) is mounted in the sealing ring mounting groove (42) and is fixedly connected thereto; a sealing ring mounting groove (43) is provided on the outer side wall of the air guide pipe (14); the inner side of the sealing ring (41) is placed in the sealing ring mounting groove (43) and is sealingly rotatably connected thereto; an annular oil chamber (44) is provided on the inner side of the air guide pipe (14); the annular oil chamber (44) is located on the inner side of the sealing ring mounting groove (43) and the two are connected via an oil guide passage (45); an end wall at one end of the annular oil chamber (44) is connected to the outer surface of the air guide pipe (14) via an oil injection passage (46).

7. The adsorption fan structure for waste gas treatment according to claim 6 is characterized in that: An axial movable annular groove (47) is provided on the inner wall of the oil injection passage (46). The axial movable annular groove (47) and the axial sliding groove (32) are respectively located on both sides of the annular oil chamber (44). A movable plate (48) is installed in the axial movable annular groove (47). The movable plate (48) and the axial movable annular groove (47) are sealingly and slidably connected. A return spring (49) is provided between the end wall of the axial movable annular groove (47) and the end surface of the movable plate (48). An oil through hole (50) is provided on the movable plate (48). A movable rod (51) is provided, wherein the rod diameter of the movable rod (51) is smaller than the hole diameter of the oil hole (50), one end of the movable rod (51) passes through the oil hole (50) and a plug (55) is fixed thereon, the width of the plug (55) is larger than the hole diameter of the oil hole (50), a movable rod through hole (52) matching with the movable rod (51) is provided between the end wall of the other end of the annular oil chamber (44) and the end wall of one of the axial slide grooves (32), and the other end of the movable rod (51) passes through the movable rod through hole (52) and is fixed on the slider (33).

8. The adsorption fan structure for waste gas treatment according to any one of claims 1 to 7, characterized in that: The fan housing (2) further comprises a chassis (1), wherein the fan housing (2) is fixed on the chassis (1), a motor (8) and a shaft frame (3) are also fixed on the chassis (1), the shaft (4) is mounted on the shaft frame (3) and is rotatably connected thereto, the motor (8) is provided with a motor shaft (9), a housing through hole (5) is provided on the side wall of the fan housing (2), one end of the shaft (4) passes through the housing through hole (5) and is placed inside the fan housing (2), the impeller assembly is mounted on one end of the shaft (4), and the other end of the shaft (4) and the end of the motor shaft (9) are connected by a belt (10) for transmission.

9. The adsorption fan structure for waste gas treatment according to claim 8 is characterized in that: A motor pulley (53) is fixed to the end of the motor shaft (9), one side of the belt (10) is sleeved on the motor pulley (53), and a rotating shaft pulley (54) is fixed to the other end of the rotating shaft (4), and the other side of the belt is sleeved on the rotating shaft pulley (54).

10. The adsorption fan structure for waste gas treatment according to claim 8, characterized in that: A sealing cover (11) is provided at the housing through hole (5), the sealing cover (11) is placed on the outer side wall of the fan housing (2) and installed at the end of the housing through hole (5), the sealing cover (11) is sleeved on the rotating shaft (4) and is connected to it in a sealed rotation manner, and the fan housing (2) is also provided with a plurality of L-shaped pressing plates (12), the L-shaped pressing plates (12) are distributed in an annular shape around the sealing cover (11), the end of one side of the L-shaped pressing plate (12) is fixed to the outer side wall of the fan housing (2), the sealing cover (11) is placed between the other side of the L-shaped pressing plate (12) and the outer side wall of the fan housing (2), and the connection between the two side edges of the L-shaped pressing plate (12) is transitioned through a rounded corner.

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