A formaldehyde removal equipment for paint purification and an operating method thereof

Abstract

The application discloses a formaldehyde removal equipment for paint purification and an operation method, and relates to the technical field of formaldehyde removal equipment.The formaldehyde removal equipment comprises a rack, a machine body installed on the top of the rack, an air suction fan installed on the bottom of the machine body, and a wind collecting cover communicated with one side of the air suction fan, wherein the other side of the air suction fan is provided with a drying mechanism, the drying mechanism comprises a first shunt pipe communicated with the other side of the air suction fan, a drying cylinder communicated with one side of the first shunt pipe, and a second shunt pipe communicated with one side of the drying cylinder, and the air entering the machine body is subjected to drying treatment through the drying mechanism.The formaldehyde removal equipment is used in cooperation with the adsorption mechanism, the air containing formaldehyde is subjected to drying treatment before being subjected to adsorption purification, the preferential occupation of the active carbon adsorption sites by the moisture in the air is effectively avoided, the saturation speed of the active carbon is delayed, the phenomenon of frequent shutdown and filter plate replacement caused by excessively high humidity is reduced, and the continuous operation capacity of the equipment is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of formaldehyde removal equipment, and in particular relates to a formaldehyde removal device and its operating method for paint purification. Background Technology

[0002] Formaldehyde is one of the main indoor air pollutants during building decoration and coating construction. Its long release period and great harm have made it a key focus of environmental governance. At present, the purification of formaldehyde in the air during coating construction mainly uses formaldehyde removal equipment, which adopts three technical paths: physical adsorption, photocatalytic oxidation and biological enzyme degradation.

[0003] Photocatalytic oxidation technology can completely decompose formaldehyde into carbon dioxide and water, with the advantage of no secondary pollution. However, the purification efficiency of this technology is highly dependent on the light source intensity, catalyst activity, and effective action distance. In the actual environment of paint application, uneven light in the application area leads to a significant decrease in photocatalytic effect. Bio-enzyme degradation uses enzyme catalysis to decompose formaldehyde. The reaction conditions are mild, but the enzyme activity is easily reduced or even deactivated during the application interval or under low temperature and dry conditions, making it difficult to maintain a continuous and stable purification capacity.

[0004] Therefore, in actual construction, physical adsorption is widely used due to its simple operation and strong applicability. This method usually uses activated carbon filter plates to adsorb and retain formaldehyde in the air. However, the adsorption of formaldehyde by activated carbon is a physical adsorption process, and it also has a strong affinity for moisture. During the coating application process, the air often contains humidity, and water molecules will preferentially occupy the microporous structure of activated carbon, causing the active sites to quickly become saturated and the adsorption capacity to drop rapidly. In order to ensure the purification effect, it is necessary to frequently stop the machine to replace the activated carbon filter plates. The replacement of filter plates often involves equipment disassembly and assembly, filter material cleaning and other steps, which is time-consuming. This not only reduces the continuous operation capacity of the equipment, but also significantly affects the overall efficiency of formaldehyde removal.

[0005] To address this issue, we provide a formaldehyde removal device and operating method for paint purification, which solves the aforementioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a formaldehyde removal device and operating method for paint purification. By combining the adsorption mechanism and the drying mechanism, it solves the problems of easy saturation and frequent replacement required in the existing formaldehyde removal devices for paint purification, as well as long downtime and reduced formaldehyde removal efficiency.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a formaldehyde removal device for paint purification, comprising a frame, a body mounted on top of the frame, a suction fan mounted at the bottom of the body, an air collection hood connected to one side of the suction fan, and a drying mechanism on the other side of the suction fan. The drying mechanism includes a first diversion pipe connected to the other side of the suction fan, a drying cylinder connected to one side of the first diversion pipe, and a second diversion pipe connected to one side of the drying cylinder. The drying mechanism dries the air entering the body. An adsorption mechanism is located above the suction fan, comprising an adsorption cylinder located above the suction fan and a rotating disk located on the surface of the adsorption cylinder. The adsorption mechanism adsorbs and purifies the formaldehyde in the dried air.

[0009] The present invention is further configured such that the drying mechanism includes a one-way valve respectively sleeved on the surface of the first diversion pipe and the second diversion pipe, a desiccant laid at the bottom of the drying cylinder, a feed pipe connected to the top of the drying cylinder, a sealing cap threaded to the surface of the feed pipe, a bottom cover threaded to the bottom of the drying cylinder, and an agitator assembly disposed above the sealing cap.

[0010] The present invention is further configured such that the adsorption mechanism includes a first activated carbon filter plate installed inside the adsorption cylinder, a second activated carbon filter plate disposed on top of the first activated carbon filter plate, a third activated carbon filter plate disposed on top of the second activated carbon filter plate, a conduit disposed below the turntable, an exhaust pipe disposed above the turntable, a flow equalization pipe respectively connected to the top end of the conduit and the bottom end of the exhaust pipe, and a switching component disposed below the exhaust pipe.

[0011] The present invention is further configured such that the agitation assembly includes a reciprocating lead screw disposed above the sealing cover, a motor disposed on one side of the reciprocating lead screw, a rotating rod mounted on the output end of the motor, a first bevel gear mounted on the side of the rotating rod away from the motor, a second bevel gear meshing with the first bevel gear on the side away from the rotating rod, a ball bearing nut sleeve sleeved on the surface of the reciprocating lead screw, a groove formed on the surface of the ball bearing nut sleeve, a support plate disposed below the reciprocating lead screw, a first gear rotatably connected to the top of the support plate, a toothed plate meshing with one side of the first gear, a stirring frame disposed on the other side of the first gear, a second gear mounted on the top surface of the stirring frame, a first electric telescopic rod mounted on the side of the toothed plate away from the first gear, and a locking block mounted on the output end of the first electric telescopic rod.

[0012] The present invention is further configured such that the switching assembly includes a fixed plate disposed below the exhaust pipe, a second electric telescopic rod installed on the front side of the fixed plate, a compression wheel installed on the output end of the second electric telescopic rod, oblique blocks respectively disposed on the top and bottom of the compression wheel, a connecting frame installed on one side of the oblique blocks, a movable cylinder installed on the side of the connecting frame away from the oblique blocks, a fixed cylinder disposed on one side of the movable cylinder, a support cylinder disposed on the other side of the movable cylinder, a spring installed between the support cylinder and the movable cylinder, a first sealing gasket installed on the surface of the movable cylinder, a second sealing gasket installed inside the fixed cylinder, and a spring disposed on the second electric telescopic rod. A transmission rod on one side of the rod, a horizontal plate rotatably connected to the surface of the transmission rod, a third bevel gear installed at the bottom of the transmission rod, a third gear installed on the top surface of the transmission rod, a drive rod located in front of the transmission rod, a fourth gear located on the surface of the drive rod, a support rod installed at the bottom of the fourth gear, a movable block installed at the bottom of the support rod, a fixed plate located at the top of the fourth gear, a third electric telescopic rod installed at the bottom of the fixed plate, a limit rod installed at the output end of the third electric telescopic rod, a limit groove opened at the top of the fourth gear, a fifth gear located at the top of the fixed plate, and a gear ring meshing with the fifth gear on one side.

[0013] The present invention is further configured such that a filter screen is provided on one side of the air collecting hood, and casters are installed around the bottom of the frame.

[0014] The present invention is further configured such that a sealing plate is fixedly connected to one side of the machine body by bolts, and a magnetic plate is magnetically attached to the top of the machine body.

[0015] The present invention is further configured such that a support column is installed on one side of both the duct and the exhaust pipe.

[0016] The present invention is further configured such that a fourth electric telescopic rod is installed on one side of the machine body, a positioning frame is installed at the output end of the fourth electric telescopic rod, and positioning plates are installed in a circumferential array on the surface of the turntable.

[0017] An operating method for a formaldehyde removal device for paint purification includes the following steps:

[0018] S1: The suction fan is activated. The air at the paint application site is filtered and dust removed by the filter screen, and then enters the drying chamber through the air collection hood and the first diversion pipe. After being dried by the desiccant, it is blown to the adsorption cylinder through the second diversion pipe, the conduit and the equalization pipe. After being adsorbed by the third activated carbon filter plate inside, it is discharged through the equalization pipe and the exhaust pipe.

[0019] S2: Periodically activate the first electric telescopic rod to engage the locking block into the slot of the ball nut sleeve, causing the motor to operate and drive the rotating rod to rotate. This, in turn, drives the reciprocating screw to rotate via the first and second bevel gears, which in turn drives the toothed plate to move via the ball nut sleeve. Finally, the first and second gears drive the stirring frame to rotate, slowly agitating the desiccant. This breaks the static state of the desiccant, changes the airflow channel, and improves the utilization rate of the desiccant.

[0020] S3: Periodically activate the second electric telescopic rod to move the extrusion wheel, extruding the obliquely cut block. This causes the movable cylinder to move via the connecting frame and compress the spring. Then, activate the third electric telescopic rod to insert the limit rod into the limit groove. At this time, the second bevel gear drives the third bevel gear to rotate. This, in turn, drives the fourth gear to rotate via the transmission rod and the third gear. Finally, the limit rod and the third electric telescopic rod drive the fixed plate and the drive rod to rotate. This, in turn, drives the gear ring to rotate via the fifth gear. This allows you to switch the spare adsorption cylinder to the working position and replace the used adsorption cylinder.

[0021] The beneficial effects of this invention are as follows: By using a drying mechanism in conjunction with an adsorption mechanism, the air containing formaldehyde is dried before adsorption and purification. This effectively prevents moisture in the air from preferentially occupying the adsorption sites of activated carbon, slows down the saturation rate of the activated carbon, reduces the frequency of downtime for filter replacement due to excessive humidity, and improves the continuous operation capability of the equipment. Simultaneously, the agitation component slowly stirs the desiccant, breaking the airflow channels in the static state of the desiccant. This prevents airflow from passing only through the area of ​​least resistance, thus avoiding underutilization of some desiccant and improving the efficiency and stability of the drying effect. Furthermore, the switching component, combined with the turntable structure, allows for quick switching of the standby adsorption cylinder to the working position. Combined with real-time feedback from electrochemical and humidity sensors, dynamic switching and online maintenance of the drying and adsorption cylinders are achieved, significantly shortening the downtime required for filter replacement or desiccant replacement. This overall improves the continuity and purification efficiency of formaldehyde removal operations. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0023] Figure 1 This is a three-dimensional diagram of a formaldehyde removal device and its operation method for purifying paint.

[0024] Figure 2 This is a cross-sectional view of the body of a formaldehyde removal device and operating method for paint purification.

[0025] Figure 3 This is a left view of the air collection hood in a formaldehyde removal device and operating method for paint purification.

[0026] Figure 4 This is a connection diagram of the first diversion pipe and the drying cylinder in a formaldehyde removal device and operating method for paint purification.

[0027] Figure 5 This is a cross-sectional view of the drying cylinder in a formaldehyde removal device and operating method for paint purification.

[0028] Figure 6 This is a cross-sectional view of a ball bearing nut sleeve in a formaldehyde removal device and operating method for paint purification.

[0029] Figure 7 This is a cross-sectional view of the positioning frame in a formaldehyde removal device and operating method for paint purification.

[0030] Figure 8 This is a cross-sectional view of a rotating disc in a formaldehyde removal device and operating method for purifying paint.

[0031] Figure 9 This is a cross-sectional view of the adsorption cylinder in a formaldehyde removal device and operating method for paint purification.

[0032] Figure 10 This is a right view of the extrusion wheel in a formaldehyde removal device and operating method for paint purification.

[0033] Figure 11 This is a top view of the gear ring in a formaldehyde removal device and operating method for paint purification.

[0034] Figure 12 This is a cross-sectional view of a horizontal plate in a formaldehyde removal device and operating method for paint purification.

[0035] Figure 13 A formaldehyde removal device and operating method for paint purification Figure 9 A magnified view of A in the middle.

[0036] In the attached diagram: 1. Frame; 2. Machine body; 3. Fan; 4. Air collector hood; 5. Drying mechanism; 51. First distributor pipe; 52. Drying cylinder; 53. Second distributor pipe; 54. One-way valve; 55. Desiccant; 56. Feed pipe; 57. Sealing cover; 58. Bottom cover; 59. Agitator assembly; 591. Reciprocating screw; 592. Motor; 593. Rotating rod; 594. First bevel gear; 595. Second bevel gear; 596. 597. Ball bearing nut sleeve; 598. Slot; 599. Support plate; 590. First gear; 5910. Gear plate; 5911. Stirring frame; 5912. Second gear; 5913. First electric telescopic rod; 5914. Locking block; 6. Adsorption mechanism; 61. Adsorption cylinder; 62. Turntable; 63. First activated carbon filter plate; 64. Second activated carbon filter plate; 65. Third activated carbon filter plate; 66. Conduit; 67. Exhaust pipe; 68. 8. Flow equalization pipe; 69. Switching assembly; 691. Fixing plate; 692. Second electric telescopic rod; 693. Extrusion wheel; 694. Beveled block; 695. Connecting frame; 696. Movable cylinder; 697. Fixing cylinder; 698. Support cylinder; 699. Spring; 6910. First sealing gasket; 6911. Second sealing gasket; 6912. Transmission rod; 6913. Horizontal plate; 6914. Third bevel gear; 6915. Third Gear; 6916, Drive rod; 6917, Fourth gear; 6918, Support rod; 6919, Movable block; 6920, Fixed plate; 6921, Third electric telescopic rod; 6922, Limiting rod; 6923, Limiting groove; 6924, Fifth gear; 6925, Gear ring; 7, Filter screen; 8, Universal wheel; 9, Sealing plate; 10, Magnetic suction plate; 11, Fourth electric telescopic rod; 12, Positioning frame; 13, Positioning plate. Detailed Implementation

[0037] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Example 1

[0039] Please see Figures 1-13This invention relates to a formaldehyde removal device and operating method for paint purification, comprising a frame 1, a body 2 mounted on top of the frame 1, a suction fan 3 mounted at the bottom of the body 2, an air collection hood 4 connected to one side of the suction fan 3, and a drying mechanism 5 disposed on the other side of the suction fan 3. The drying mechanism 5 includes a first diversion pipe 51 connected to the other side of the suction fan 3, a drying cylinder 52 connected to one side of the first diversion pipe 51, and a second diversion pipe 53 connected to one side of the drying cylinder 52. The drying mechanism 5 dries the air entering the body 2. An adsorption mechanism 6 is disposed above the suction fan 3, comprising an adsorption cylinder 61 disposed above the suction fan 3 and a rotating disk 62 disposed on the surface of the adsorption cylinder 61. The adsorption mechanism 6 adsorbs and purifies the formaldehyde in the dried air. The drying mechanism 5 also includes one-way valves 54 respectively sleeved on the surfaces of the first diversion pipe 51 and the second diversion pipe 53. The desiccant 55 is laid at the bottom of the drying cylinder 52, the feed pipe 56 is connected to the top of the drying cylinder 52, the sealing cap 57 is threaded to the surface of the feed pipe 56, the bottom cover 58 is threaded to the bottom of the drying cylinder 52, the stirring component 59 is set above the sealing cap 57, the adsorption mechanism 6 also includes a first activated carbon filter plate 63 installed inside the adsorption cylinder 61, a second activated carbon filter plate 64 set on top of the first activated carbon filter plate 63, a third activated carbon filter plate 65 set on top of the second activated carbon filter plate 64, a guide tube 66 set below the turntable 62, an exhaust pipe 67 set above the turntable 62, a flow equalization pipe 68 connected to the top of the guide tube 66 and the bottom of the exhaust pipe 67 respectively, a switching component 69 set below the exhaust pipe 67, a filter screen 7 is set on one side of the air collecting hood 4, universal wheels 8 are installed around the bottom of the frame 1, and support columns are installed on one side of the guide tube 66 and the exhaust pipe 67.

[0040] The air inlet of the air collecting hood 4 extends to the outside of the body 2. The air collecting hood 4 and the drying cylinder 52 are fixedly connected to the body 2. There are six adsorption cylinders 61, which are arranged in a circumferential array on the top of the turntable 62 and are threadedly connected to the turntable 62. During drying, the desiccant 55 fills the drying cylinder 52 (this is only for illustration). The bottom cover 58 extends through to the bottom of the frame 1 and is fixedly connected to a handle. The second activated carbon filter plate 64 and the third activated carbon filter plate 65 are fixedly connected to the adsorption cylinders 61. The pore sizes of the first activated carbon filter plate 63, the second activated carbon filter plate 64, and the third activated carbon filter plate 65 decrease sequentially. The number of ducts 66 and exhaust pipes 67 are both single. The positions of the adsorption cylinders 61 corresponding to the ducts 66 and exhaust pipes 67 are the working positions. The filter screen 7 The filter screen 7 is detachably connected to the air collecting hood 4. The bottom of the filter screen 7 is rotatably connected to the air collecting hood 4 via a rotating shaft. A bracket is installed on the top of the air collecting hood 4. A threaded rod is threadedly connected to the top of the bracket. A plug is rotatably connected to the bottom of the threaded rod via a bearing. The plug is inserted into the top of the filter screen 7. A limit plate is installed on one side of the plug. The limit plate is slidably connected to the bracket. A sliding groove that matches the limit plate is opened on the side of the bracket near the plug. The support column is fixedly connected to the body 2. The duct 66 is connected to the second diversion pipe 53. The top of the exhaust pipe 67 extends to the top of the body 2. The exhaust pipe 67 is fixedly connected to the body 2. An observation window is installed at the front of the body 2. The duct 66 and the exhaust pipe 67 both extend into the movable cylinder 696 and are connected to the flow equalization pipe 68.

[0041] The main body 2 houses various functional components. The suction fan 3 provides power to draw formaldehyde-containing air into the device. The air collection hood 4 guides the air into the device. The first diversion pipe 51 and the second diversion pipe 53 guide the air in and out of the drying cylinder 52. The drying cylinder 52 is used to absorb moisture in the air and prevent water molecules from competing for activated carbon adsorption sites. The one-way valve 54 prevents backflow of air and ensures that the airflow direction is controllable. The feed pipe 56, sealing cover 57 and bottom cover 58 facilitate the addition and replacement of desiccant 55. The adsorption cylinder 61 is used to adsorb formaldehyde. The turntable 62 can rotate and install multiple adsorption cylinders 61 to facilitate switching to a spare cylinder. The pore size of the first activated carbon filter plate 63, the second activated carbon filter plate 64 and the third activated carbon filter plate 65 decreases step by step to increase the contact area and improve the adsorption efficiency. The conduit 66 and the flow equalization pipe 68 guide the air to enter the adsorption cylinder 61 evenly and avoid concentrated airflow or excessive flow rate.

[0042] During operation, the suction fan 3 is activated. The air at the paint application site is filtered by the filter screen 7 to remove dust, and then enters the drying cylinder 52 through the air collection hood 4 and the first diversion pipe 51. After being dried by the desiccant 55, the air is evenly blown towards the adsorption cylinder 61 through the second diversion pipe 53, the conduit 66, and the equalization pipe 68. Under the obstruction of the first activated carbon filter plate 63 and the second activated carbon filter plate 64, the formaldehyde in the air is fully contacted with the third activated carbon filter plate 65, thereby achieving thorough adsorption and purification. This avoids the situation where the air only flows through the center of the third activated carbon filter plate 65 or fails to be completely adsorbed and purified due to excessive flow rate. By adopting the method of drying first and then adsorption, frequent shutdowns caused by moisture are avoided, and the formaldehyde removal efficiency is improved.

[0043] Example 2

[0044] Please see Figures 2-6 Based on Embodiment 1, the agitation assembly 59 includes a reciprocating lead screw 591 disposed above the sealing cover 57, a motor 592 disposed on one side of the reciprocating lead screw 591, a rotating rod 593 mounted on the output end of the motor 592, a first bevel gear 594 mounted on the side of the rotating rod 593 away from the motor 592, a second bevel gear 595 meshing with the side of the first bevel gear 594 away from the rotating rod 593, a ball bearing nut sleeve 596 sleeved on the surface of the reciprocating lead screw 591, and a groove formed on the surface of the ball bearing nut sleeve 596. 597, a support plate 598 located below the reciprocating lead screw 591, a first gear 599 rotatably connected to the top of the support plate 598, a toothed plate 5910 meshing with one side of the first gear 599, a stirring rack 5911 located on the other side of the first gear 599, a second gear 5912 mounted on the top surface of the stirring rack 5911, a first electric telescopic rod 5913 mounted on the side of the toothed plate 5910 away from the first gear 599, and a locking block 5914 mounted on the output end of the first electric telescopic rod 5913.

[0045] The reciprocating lead screw 591 is rotatably connected to the machine body 2 via bearings. The motor 592 and support plate 598 are fixedly connected to the machine body 2. The second bevel gear 595 is mounted on the surface of the reciprocating lead screw 591. The first gear 599 is rotatably connected to the support plate 598 via bearings. The gear plate 5910 is slidably connected to the support plate 598. A slider is mounted at the bottom of the support plate 598, and a groove matching the slider is opened at the top of the support plate 598. The bottom of the stirring rack 5911 extends into the drying cylinder 52. The stirring rack 5911 is rotatably connected to the drying cylinder 52 via bearings. The first gear 591... 9 meshes with the second gear 5912, the diameter of the second gear 5912 is larger than that of the first gear 599, the top of the first electric telescopic rod 5913 is provided with a guide rod, the locking block 5914 is sleeved on the surface of the guide rod, the locking block 5914 can move along the guide rod direction on the surface of the guide rod, a humidity detection sensor is installed on one side of the conduit 66, its detection end is located inside the conduit 66, the agitation assembly 59 consisting of the drying cylinder 52, the ball nut sleeve 596, the toothed plate 5910, the first gear 599 and the second gear 5912 consists of three parts, the humidity detection sensor is a mature existing technology, and will not be described in detail here.

[0046] The humidity of the air entering the conduit 66 is detected by a humidity sensor. When humidity is detected, the first electric telescopic rod 5913 of one of the three agitation components 59 is activated, causing the locking block 5914 to engage with the corresponding slot 597 of the ball bearing nut sleeve 596. The motor 592 drives the rotating rod 593 and the first bevel gear 594 to rotate, which in turn drives the reciprocating screw 591 to rotate via the second bevel gear 595. The ball bearing nut sleeve 596 moves the locking block 5914, the first electric telescopic rod 5913, and the toothed plate 5910. The first gear 599 and the second gear 5912 drive the stirring frame 5911 to rotate. The desiccant 55 in the working drying cylinder 52 is slowly stirred to break its static state and change the airflow channel, preventing airflow from flowing through the area of ​​least resistance and causing some of the desiccant 55 to be unused, thus increasing the utilization rate of the desiccant 55. After stirring, if no humidity is detected, the current drying cylinder 52 can continue to be used for drying. If humidity is detected, the current one-way valve 54 can be closed, and the drying valve of any one of the other two drying cylinders 52 can be opened to continue working as the working drying cylinder 52. This ensures drying efficiency while avoiding downtime due to desiccant 55 replacement, further improving the formaldehyde removal efficiency.

[0047] Example 3

[0048] Please see Figures 7-13Based on Embodiments 1 and 2, the switching assembly 69 includes a fixed plate 691 disposed below the exhaust pipe 67, a second electric telescopic rod 692 installed on the front side of the fixed plate 691, a compression wheel 693 installed at the output end of the second electric telescopic rod 692, oblique cutting blocks 694 respectively disposed on the top and bottom of the compression wheel 693, a connecting frame 695 installed on one side of the oblique cutting block 694, a movable cylinder 696 installed on the side of the connecting frame 695 away from the oblique cutting block 694, a fixed cylinder 697 disposed on one side of the movable cylinder 696, a support cylinder 698 disposed on the other side of the movable cylinder 696, a spring 699 installed between the support cylinder 698 and the movable cylinder 696, a first sealing gasket 6910 installed on the surface of the movable cylinder 696, a second sealing gasket 6911 installed inside the fixed cylinder 697, and a transmission rod 6912 disposed on one side of the second electric telescopic rod 692. A horizontal plate 6913 is movably connected to the surface of the transmission rod 6912; a third bevel gear 6914 is installed at the bottom of the transmission rod 6912; a third gear 6915 is installed on the top surface of the transmission rod 6912; a drive rod 6916 is located in front of the transmission rod 6912; a fourth gear 6917 is located on the surface of the drive rod 6916; a support rod 6918 is installed at the bottom of the fourth gear 6917; a movable block 6919 is installed at the bottom of the support rod 6918; a fixed plate 6920 is located at the top of the fourth gear 6917; a third electric telescopic rod 6921 is installed at the bottom of the fixed plate 6920; a limiting rod 6922 is installed at the output end of the third electric telescopic rod 6921; a limiting groove 6923 is opened at the top of the fourth gear 6917; a fifth gear 6924 is located at the top of the fixed plate 6920; and a gear ring 6925 meshes with one side of the fifth gear 6924.

[0049] The fixed plate 691 is fixedly connected to the machine body 2. The extrusion wheel 693 is in close contact with the oblique cut block 694. There are two sets of movable cylinders 696, fixed cylinders 697 and support cylinders 698, located at the top and bottom of the adsorption cylinder 61 at the working position, respectively. The two movable cylinders 696 are respectively sleeved on the surface of the guide tube 66 and the exhaust pipe 67. The two support cylinders 698 are respectively installed on the surface of the guide tube 66 and the exhaust pipe 67. The two fixed cylinders 697 are respectively installed on the top and bottom of the turntable 62. The first sealing gasket 6910 and the second sealing gasket 6911 are in extrusion contact, and the extrusion contact surface is an arc-shaped oblique cut surface. The third bevel gear 6914 meshes with the second bevel gear 595. The transmission rod 6912 and the drive rod 6916 are both connected by shafts. The bearing is rotatably connected to the horizontal plate 6913, and the rear end of the horizontal plate 6913 is fixedly connected to the body 2. The third gear 6915 and the fourth gear 6917 mesh with each other. The fourth gear 6917 is hollow and is located on the surface of the drive rod 6916. The top of the horizontal plate 6913 has a movable groove that matches the movable block 6919. The fixed plate 6920 and the fifth gear 6924 are both installed on the surface of the drive rod 6916. The gear ring 6925 is installed on the bottom surface of the turntable 62. An electrochemical sensor is installed on one side of the exhaust pipe 67, and its detection end is located inside the exhaust pipe 67. The electrochemical sensor is a mature existing technology and will not be described in detail here. A limit block is installed on one side of the connecting frame 695, and the limit block is slidably connected to the body 2.

[0050] Formaldehyde in the air at exhaust pipe 67 is detected by an electrochemical sensor. If formaldehyde is detected, the second electric telescopic rod 692 operates, driving the extrusion wheel 693 to move and extrude the oblique cut block 694. This, in turn, drives the movable cylinder 696 to move via the connecting frame 695, compressing the spring 699, releasing the seal with the fixed cylinder 697, and making room for the turntable 62 to rotate. Subsequently, the third electric telescopic rod 6921 operates, driving the limiting rod 6922 to insert into the limiting groove 6923. The second bevel gear 595 drives the third bevel gear 6914 to rotate, thus transmitting power through the transmission mechanism. Rod 6912 drives the third gear 6915 to rotate, which in turn drives the fifth gear 6924 to rotate via the fourth gear 6917, the limit rod 6922, the third electric telescopic rod 6921, and the fixed plate 6920. This drives the adsorption cylinder 61 to rotate via the gear ring 6925, thus switching the spare adsorption cylinder 61 to the working position. This causes the second electric telescopic rod 692 to work, which in turn drives the movable cylinder 696 to reset and seal with the fixed cylinder 697, allowing the formaldehyde purification operation to resume. The entire process is shorter than the time required to stop and replace the adsorption cylinder 61, further improving the formaldehyde removal efficiency.

[0051] Example 4

[0052] Please see Figure 2 and Figure 7Based on Embodiments 1 to 3, a sealing plate 9 is fixedly connected to one side of the machine body 2 by bolts, a magnetic suction plate 10 is magnetically attached to the top of the machine body 2, a fourth electric telescopic rod 11 is installed on one side of the machine body 2, a positioning frame 12 is installed at the output end of the fourth electric telescopic rod 11, and a positioning plate 13 is installed in a circular array on the surface of the turntable 62.

[0053] A contact sensor is installed inside the positioning frame 12. The contact sensor is in close contact with the positioning plate 13. The contact sensor is a mature existing technology and will not be described in detail here. The sealing plate 9 and the magnetic suction plate 10 make it easy for users to replace the desiccant 55 and the adsorption cylinder 61 regularly, or replace them online without stopping the machine, which is convenient for users. The positioning frame 12 and the positioning plate 13 can position the turntable 62 when switching the spare adsorption cylinder 61. When the turntable 62 rotates, the fourth electric telescopic rod 11 works to drive the positioning frame 12 to move and make way for the positioning plate 13. When the positioning plate 13 that is currently in contact with the contact sensor rotates to the rear, the positioning frame 12 is reset. When the next positioning plate 13 rotates to contact the contact sensor, the spare adsorption cylinder 61 is switched into place. The top of the turntable 62 is equipped with a number plate in a circular array to facilitate the user to distinguish the adsorption cylinder 61.

[0054] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A formaldehyde removal device for paint purification, comprising a frame (1), a body (2) installed on the top of the frame (1), a suction fan (3) installed at the bottom inside the body (2), and an air collection hood (4) connected to one side of the suction fan (3), characterized in that: A drying mechanism (5) is provided on the other side of the suction fan (3). The drying mechanism (5) includes a first diversion pipe (51) connected to the other side of the suction fan (3), a drying cylinder (52) connected to one side of the first diversion pipe (51), and a second diversion pipe (53) connected to one side of the drying cylinder (52). The air entering the machine body (2) is dried by the drying mechanism (5). An adsorption mechanism (6) is provided above the blower (3). The adsorption mechanism (6) includes an adsorption cylinder (61) provided above the blower (3) and a turntable (62) provided on the surface of the adsorption cylinder (61). The adsorption mechanism (6) adsorbs and purifies the formaldehyde in the air after drying.

2. The formaldehyde removal equipment for paint purification according to claim 1, characterized in that: The drying mechanism (5) also includes a one-way valve (54) respectively sleeved on the surface of the first diversion pipe (51) and the second diversion pipe (53), a desiccant (55) laid on the bottom of the drying cylinder (52), a feed pipe (56) connected to the top of the drying cylinder (52), a sealing cap (57) threaded to the surface of the feed pipe (56), a bottom cover (58) threaded to the bottom of the drying cylinder (52), and an agitator (59) set above the sealing cap (57).

3. The formaldehyde removal equipment for paint purification according to claim 1, characterized in that: The adsorption mechanism (6) further includes a first activated carbon filter plate (63) installed inside the adsorption cylinder (61), a second activated carbon filter plate (64) set on top of the first activated carbon filter plate (63), a third activated carbon filter plate (65) set on top of the second activated carbon filter plate (64), a conduit (66) set below the turntable (62), an exhaust pipe (67) set above the turntable (62), a flow equalization pipe (68) connected to the top of the conduit (66) and the bottom of the exhaust pipe (67) respectively, and a switching component (69) set below the exhaust pipe (67).

4. The formaldehyde removal equipment for paint purification according to claim 2, characterized in that: The agitation assembly (59) includes a reciprocating lead screw (591) disposed above the sealing cover (57), a motor (592) disposed on one side of the reciprocating lead screw (591), a rotating rod (593) mounted on the output end of the motor (592), a first bevel gear (594) mounted on the side of the rotating rod (593) away from the motor (592), a second bevel gear (595) meshing with the side of the first bevel gear (594) away from the rotating rod (593), a ball bearing nut sleeve (596) sleeved on the surface of the reciprocating lead screw (591), and a groove (595) formed on the surface of the ball bearing nut sleeve (596). 7) A support plate (598) is set below the reciprocating screw (591), a first gear (599) is rotatably connected to the top of the support plate (598), a toothed plate (5910) meshes with one side of the first gear (599), a stirring rack (5911) is set on the other side of the first gear (599), a second gear (5912) is installed on the top surface of the stirring rack (5911), a first electric telescopic rod (5913) is installed on the side of the toothed plate (5910) away from the first gear (599), and a locking block (5914) is installed at the output end of the first electric telescopic rod (5913).

5. The formaldehyde removal equipment for paint purification according to claim 3, characterized in that: The switching assembly (69) includes a fixed plate (691) disposed below the exhaust pipe (67), a second electric telescopic rod (692) installed on the front side of the fixed plate (691), a compression wheel (693) installed at the output end of the second electric telescopic rod (692), oblique cutting blocks (694) respectively disposed on the top and bottom of the compression wheel (693), a connecting frame (695) installed on one side of the oblique cutting block (694), and a movable cylinder (694) installed on the side of the connecting frame (695) away from the oblique cutting block (694). 96), a fixed cylinder (697) set on one side of the movable cylinder (696), a support cylinder (698) set on the other side of the movable cylinder (696), a spring (699) installed between the support cylinder (698) and the movable cylinder (696), a first sealing gasket (6910) installed on the surface of the movable cylinder (696), a second sealing gasket (6911) installed inside the fixed cylinder (697), a transmission rod (6912) set on one side of the second electric telescopic rod (692), and rotatably connected to the transmission A horizontal plate (6913) on the surface of the rod (6912), a third bevel gear (6914) installed at the bottom of the transmission rod (6912), a third gear (6915) installed on the top surface of the transmission rod (6912), a drive rod (6916) located in front of the transmission rod (6912), a fourth gear (6917) located on the surface of the drive rod (6916), a support rod (6918) installed at the bottom of the fourth gear (6917), and a movable block installed at the bottom of the support rod (6918). (6919), a fixed plate (6920) set on the top of the fourth gear (6917), a third electric telescopic rod (6921) installed on the bottom of the fixed plate (6920), a limiting rod (6922) installed on the output end of the third electric telescopic rod (6921), a limiting groove (6923) opened on the top of the fourth gear (6917), a fifth gear (6924) set on the top of the fixed plate (6920), and a gear ring (6925) meshing with one side of the fifth gear (6924).

6. The formaldehyde removal equipment for paint purification according to claim 1, characterized in that: A filter screen (7) is provided on one side of the air collecting hood (4), and casters (8) are installed around the bottom of the frame (1).

7. The formaldehyde removal equipment for paint purification according to claim 1, characterized in that: A sealing plate (9) is fixedly connected to one side of the body (2) by bolts, and a magnetic plate (10) is magnetically attached to the top of the body (2).

8. The formaldehyde removal equipment for paint purification according to claim 3, characterized in that: Support columns are installed on one side of both the duct (66) and the exhaust pipe (67).

9. The formaldehyde removal equipment for paint purification according to claim 1, characterized in that: A fourth electric telescopic rod (11) is installed on one side of the body (2), a positioning frame (12) is installed at the output end of the fourth electric telescopic rod (11), and a positioning plate (13) is installed in a circular array on the surface of the turntable (62).

10. An operating method for a formaldehyde removal device for paint purification, based on the formaldehyde removal device for paint purification described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The suction fan (3) is turned on. The air at the paint application site is filtered and dust removed by the filter screen (7). It enters the drying box through the air collection hood (4) and the first diversion pipe (51). After being dried by the desiccant (55), it is blown to the adsorption cylinder (61) through the second diversion pipe (53), the conduit (66) and the flow equalization pipe (68). It is adsorbed by the third activated carbon filter plate (65) inside and discharged through the flow equalization pipe (68) and the exhaust pipe (67). S2: Periodically make the first electric telescopic rod (5913) work to drive the locking block (5914) to engage in the slot (597) of the ball nut sleeve (596), make the motor (592) work to drive the rotating rod (593) to rotate, drive the reciprocating screw (591) to rotate through the first bevel gear (594) and the second bevel gear (595), drive the toothed plate (5910) to move through the ball nut sleeve (596), drive the stirring rack (5911) to rotate through the first gear (599) and the second gear (5912), and slowly stir the desiccant (55), which can break the static state of the desiccant (55), change the airflow channel, and improve the utilization rate of the desiccant (55); S3: Periodically operate the second electric telescopic rod (692) to drive the extrusion wheel (693) to move and extrude the oblique cut block (694). Through the connecting frame (695), the movable cylinder (696) moves and compresses the spring (699). Then, operate the third electric telescopic rod (6921) to drive the limit rod (6922) to insert into the limit groove (6923). At this time, the second bevel gear (595) drives the third bevel gear (6914) to rotate. Through the transmission rod (6912) and the third gear (6915), the fourth gear (6917) rotates. Through the limit rod (6922) and the third electric telescopic rod (6921), the fixed plate (6920) and the drive rod (6916) rotate. Through the fifth gear (6924), the gear ring (6925) rotates. Then, the spare adsorption cylinder (61) can be switched to the working position, and the used adsorption cylinder (61) can be replaced.

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