Self-cleaning double-pricking-needle surface coating treatment device

Abstract

The invention discloses a self-cleaning double-pricking-needle surface coating treatment device, and relates to the field of medical instrument manufacturing. A self-cleaning double-pricking-needle surface coating treatment device comprises a base and further comprises lead screws symmetrically and rotationally connected to the two sides of the upper end of the base; the driving mechanism is used for driving the two lead screws to rotate synchronously and is mounted in the cavity of the base; the pricking needle body can be dried immediately after dip-coating, the problem that coating slurry sinks and gathers due to delayed drying is avoided, it is guaranteed that the thickness of a coating on the surface of the pricking needle is uniform and consistent, the coating is rapidly solidified within a proper time through timely drying treatment, the adhesive force between the coating and the surface of the pricking needle is effectively enhanced, and the pricking needle is prevented from being damaged. According to the device, the dip-coating function and the drying function are integrated, the time for transferring the felting needles among different devices is shortened, the working procedures for transferring the felting needles among the different devices are reduced, the production process is simplified, the production efficiency is improved, and large-scale production can be achieved easily.

Description

Technical Field

[0001] The invention belongs to the technical field of medical device manufacturing, and in particular relates to a self-cleaning double-lancet surface coating treatment device. Background Art

[0002] In the field of medical devices, surface coating treatment of the self-cleaning double puncture needle of the blood glucose meter is crucial to improving its performance and user experience. The coating not only improves the lubricity of the puncture needle and reduces the pain of the patient during puncture, but also enhances its biocompatibility and antibacterial properties, reducing the risk of infection.

[0003] At present, in the process of surface coating treatment of puncture needles, the existing process needs to transfer the puncture needles to special drying equipment for drying after the coating slurry treatment is completed. However, there is a time difference in the transportation process, and it is impossible to achieve immediate drying after the coating slurry treatment. During this delay time, the undried coating slurry may sink due to its own gravity and appear local aggregation, which will directly lead to uneven coating thickness, affecting the appearance quality and performance of the puncture needle. For example, during the puncture process, the resistance may change due to uneven coating, affecting the smoothness of the puncture.

[0004] In addition, delayed drying may also have a negative impact on the adhesion between the coating and the needle. If the coating is not dried in time, the bonding strength with the surface of the needle is insufficient, and the adhesion of the coating after drying is low. During subsequent use, the coating is easy to fall off from the surface of the needle, which will not only reduce the protection and functionality of the puncture needle, but also may cause foreign matter to enter the human body, causing safety risks and seriously affecting product quality and patient safety. In view of this, the present invention is specially proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a self-cleaning double-needle surface coating treatment device that can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a self-cleaning double-needle surface coating treatment device, including a base, and also including: a screw rod, which is symmetrically rotatably connected to both sides of the upper end of the base; a driving mechanism for driving the two screw rods to rotate synchronously, which is installed in the cavity of the base; a lifting block, which is threadedly connected to the screw rod; a mounting frame plate, which is arranged between the two lifting blocks, and the two sides of the mounting frame plate are fixedly connected to the lifting blocks on the same side through connecting rods; a plurality of rows of mounting holes for mounting the needle body are equidistantly provided on the mounting frame plate; a slurry pool, which is fixedly mounted on the base and is located directly below the mounting frame plate; a fixed frame cover, which is fixedly connected to the base, the screw rod and the slurry pool are both arranged on the inner side of the fixed frame cover, and the upper end of the screw rod is fixedly connected to the fixed frame cover; a hot air bin is provided at the upper end of the fixed frame cover, a fan is installed in the hot air bin through a bracket, and an electric heating pipe is fixedly installed at the upper end of the hot air bin near the air inlet.

[0007] In order to ensure the stability of the needle body and facilitate automatic detection of the needle body, a rubber ring is fixedly connected to the mounting hole of the mounting frame.

[0008] In order to improve the uniformity of contact between the hot air and the coating, further, the connecting rod is an electric cylinder.

[0009] Furthermore, the driving mechanism includes a driving motor, a transmission shaft, a driving sprocket and a transmission sprocket. The driving motor is fixedly connected to the cavity of the base, and the transmission shaft is symmetrically connected to the cavity of the base. The upper ends of the two transmission shafts are respectively fixedly connected to the screw rods on the same side, and the driving sprocket is fixedly connected to the output end of the driving motor. The transmission sprocket is fixedly connected to the transmission shaft, and the driving sprocket and the two transmission sprockets are connected by a chain.

[0010] In order to facilitate automatic control of the shutdown of the drive motor and the automatic opening of the fan and the electric heating tube, further, the upper end of the interior of the fixed frame cover is fixedly connected with a touch switch that matches the position of the installation frame plate.

[0011] In order to facilitate the stirring of the coating slurry in the slurry pool and ensure the uniform mixing of the various components, a rotating shaft is further vertically connected to the middle position inside the slurry pool, and the upper end of the rotating shaft is fixedly connected to a plurality of cross bars at equal intervals in a circle, and a plurality of rows of stirring rods are symmetrically fixedly connected to the end of the cross bar away from the rotating shaft, and a driving part for driving the rotating shaft to rotate is installed in the slurry pool.

[0012] Furthermore, the driving part includes a driving shell and a driving blade, the driving shell is fixedly connected to the middle position of the lower end of the slurry pool, the lower end of the rotating shaft is rotatably connected to the inside of the driving shell, and the driving blades are fixedly connected to the position of the rotating shaft inside the driving shell at equidistant intervals around the circumference, and an air inlet and an air outlet are respectively provided on the driving shell, the air inlet of the driving shell is connected to an air inlet pipe, and the air outlet of the driving shell is connected to an air outlet pipe, and the air inlet pipe and the air outlet pipe both extend out of the slurry pool at one end away from the driving shell.

[0013] In order to facilitate the use of the airflow generated by the fan to drive the blade to rotate, further, the end of the air outlet pipe away from the drive shell is connected to the air inlet of the hot air bin.

[0014] In order to prevent dust and other impurities from moving according to the air flow and acting on the coating on the needle body to cause contamination, a filter housing is fixedly connected to one side of the base close to the air inlet of the air inlet pipe, a filter screen is installed in the filter housing, and the air inlet of the air inlet pipe is connected to the air outlet of the filter housing.

[0015] In order to increase the service life of the filter and facilitate subsequent quick cleaning, an opening is further provided on the side of the filter housing away from the base, the filter is inclined, and the inner lower end of the filter housing is inclined and gradually inclined toward the side of the filter housing opening.

[0016] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention can dry the needle body immediately after dipping, avoiding the problem of sinking and aggregation of the coating slurry due to delayed drying, ensuring that the coating thickness on the surface of the needle is uniform, significantly improving the product appearance quality and performance, and timely drying treatment allows the coating to solidify quickly within a suitable time, effectively enhancing the adhesion between the coating and the needle surface, reducing the occurrence of coating shedding, improving product quality and stability, reducing the defective rate, and reducing cost losses caused by quality problems. The device integrates the dipping and drying functions, reduces the time and process of transferring the needle between different equipment, simplifies the production process, improves production efficiency, and is conducive to large-scale production.

[0017] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the attached figure:

[0019] Figure 1 It is a front view schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the frame plate installed in the present invention;

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the structure of part A;

[0023] Figure 5 It is a top view of the slurry pool and its internal structure in the present invention;

[0024] Figure 6 It is a schematic diagram of the structure inside the drive housing of the present invention.

[0025] In the figure: 1. Base; 101. Drive motor; 102. Drive shaft; 103. Drive sprocket; 104. Drive sprocket; 105. Screw; 106. Filter housing; 107. Filter screen; 2. Slurry tank; 201. Drive housing; 202. Rotating shaft; 203. Drive blade; 204. Cross bar; 205. Stirring rod; 206. Inlet pipe; 207. Outlet pipe; 3. Lifting block; 301. Connecting rod; 302. Mounting frame plate; 303. Rubber ring; 4. Fixed frame cover; 401. Hot air chamber; 402. Fan; 403. Electric heating tube; 404. Touch switch; 5. Needle body. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0027] Example 1:

[0028] Reference Figures 1-6 A self-cleaning double-needle surface coating treatment device includes a base 1, and also includes: screw rods 105, symmetrically connected to the upper ends of the base 1 on both sides; a driving mechanism for driving the two screw rods 105 to rotate synchronously, installed in the cavity of the base 1; a lifting block 3, threadedly connected to the screw rod 105; a mounting frame 302, set between the two lifting blocks 3, and the two sides of the mounting frame 302 are fixedly connected to the lifting blocks 3 on the same side through connecting rods 301; a plurality of rows of equidistantly provided on the mounting frame 302 for A mounting hole for installing the needle body 5; the slurry pool 2 is fixedly mounted on the base 1 and is located directly below the mounting frame plate 302; the fixed frame cover 4 is fixedly connected to the base 1, the screw rod 105 and the slurry pool 2 are both arranged on the inner side of the fixed frame cover 4, and the upper end of the screw rod 105 is fixedly connected to the fixed frame cover 4; a hot air bin 401 is provided at the upper end of the fixed frame cover 4, and a fan 402 is installed in the hot air bin 401 through a bracket, and an electric heating tube 403 is fixedly installed at the upper end of the hot air bin 401 near the air inlet.

[0029] The driving mechanism includes a driving motor 101, a transmission shaft 102, a driving sprocket 103 and a transmission sprocket 104. The driving motor 101 is fixedly connected to the cavity of the base 1, and the transmission shaft 102 is symmetrically rotated and connected to the cavity of the base 1. The upper ends of the two transmission shafts 102 are respectively fixedly connected to the screw rods 105 on the same side. The driving sprocket 103 is fixedly connected to the output end of the driving motor 101, and the transmission sprocket 104 is fixedly connected to the transmission shaft 102. The driving sprocket 103 and the two transmission sprockets 104 are connected by a chain.

[0030] In the traditional needle surface coating process, after the coating slurry treatment is completed, the needles need to be transferred to the drying equipment for drying. However, due to the inability to dry in time, the undried coating slurry is prone to sinking due to gravity and locally aggregated, resulting in uneven coating thickness, affecting the appearance and performance. Moreover, delayed drying may reduce the adhesion between the coating and the needle surface, and the coating is easy to fall off during subsequent use, seriously affecting product quality, increasing the defective rate, and increasing production costs.

[0031] When the needles are coated by the present device, a special tool is first used to accurately insert the multiple needle bodies 5 into the multiple rows of mounting holes pre-set at equal distances on the mounting frame 302. The design of the mounting holes can ensure that the needles are firmly installed and accurately positioned, which is convenient for subsequent unified processing. After the needle bodies 5 are installed, the driving mechanism can be started at this time, and the driving motor 101 starts to run. The driving sprocket 103 at its output end drives the two transmission sprockets 104 to rotate through the chain, thereby causing the two transmission shafts 102 symmetrically connected to the cavity of the base 1 to rotate synchronously, and then the screw rod 105 fixedly connected to the upper end of the transmission shaft 102 rotates accordingly. Since the lifting block 3 is threadedly connected to the screw rod 105, the rotation of the screw rod 105 drives the lifting block 3 to move downward along the screw rod 105, and through the connecting rod 301 The mounting frame 302 is synchronously moved downward, thereby driving the needle body 5 mounted thereon to move downward until the portion of the needle body 5 to be dipped in the coating is immersed in the coating slurry in the slurry pool 2 located directly below it. After the preset dipping time is reached, the screw rod 105 is controlled to reverse, so that the lifting block 3, the connecting rod 301 and the mounting frame 302 drive the needle body 5 to move upward and leave the coating slurry. When the needle body 5 moves to the top of the fixed frame 4 near the fan 402, the electric heating tube 403 and the fan 402 in the hot air bin 401 are started. The electric heating tube 403 heats the air, and the fan 402 blows the heated hot air toward the needle body 5. The hot air quickly takes away the moisture in the coating slurry on the surface of the needle body 5, so that the coating quickly solidifies and dries, and firmly adheres to the surface of the needle body 5.

[0032] After the coating is dried, the screw rod 105 is controlled to rotate again to move the mounting frame plate 302 down to the initial position, and then the special tool is used again to remove the needle body 5 from the mounting hole of the mounting frame plate 302 and hand it over to the quality inspector for quality inspection. After passing the inspection, it can be used for the subsequent assembly of the double puncture needle of the blood glucose meter.

[0033] This device can dry the needle body 5 immediately after dipping, avoiding the problem of sinking and aggregation of the coating slurry due to delayed drying, ensuring the uniform thickness of the coating on the surface of the needle, and significantly improving the appearance quality and performance of the product. Timely drying treatment allows the coating to solidify quickly within a suitable time, effectively enhancing the adhesion between the coating and the surface of the needle, reducing the occurrence of coating shedding, improving product quality and stability, reducing the defective rate, and reducing cost losses caused by quality problems. The device integrates the dipping and drying functions, reducing the time and process of transferring the needles between different equipment, simplifying the production process, improving production efficiency, and facilitating large-scale production.

[0034] Example 2:

[0035] Reference Figures 1-6 , a self-cleaning double-needle surface coating treatment device is basically the same as Example 1. Furthermore, a rubber ring 303 is fixedly connected to the mounting hole of the mounting frame plate 302. The elastic material of the rubber ring 303 can exert uniform radial pressure on the needle body 5. Even if there is a slight tolerance between the mounting hole and the outer diameter of the needle, the rubber ring 303 can be deformed to achieve a tight fit, preventing the needle from loosening or tilting during dipping or lifting, thereby ensuring the consistency of treatment of multiple needles. When the needle body 5 is pulled out using a special instrument, the friction generated by the rubber ring 303 and the coating surface will exert a slight pulling force on the coating. If the coating adhesion is insufficient, the coating will be partially torn off by the rubber ring 303, leaving marks on the needle surface, thereby achieving non-destructive and rapid detection. The operator can observe whether there is peeling or scratches on the surface of the needle by visual inspection or microscopy, and promptly detect coating process abnormalities (such as insufficient dipping time or too low drying temperature). This detection method can detect about 85% of coating adhesion-unqualified products in advance, reducing waste in subsequent assembly processes.

[0036] The connecting rod 301 is an electric cylinder. During the drying stage, the electric cylinder drives the mounting frame 302 to drive the needle body 5 to perform reciprocating linear motion, so that each point on the surface of the needle alternately receives the hot air flow blown out by the hot air chamber 401. According to thermal imaging tests, this action can improve the uniformity of temperature distribution on the surface of the needle, avoiding local overheating that causes cracking of the coating or local overcooling that causes incomplete drying. At the same time, the back and forth shaking can also cause excess coating slurry to drip from the needle body 5.

[0037] The upper end of the interior of the fixed frame cover 4 is fixedly connected to a touch switch 404 that matches the position of the mounting frame plate 302. When the needle body 5 is coated, when the driving mechanism drives the screw rod 105, the lifting block 3 and the mounting frame plate 302 to rise, the needle body 5 is moved to the drying station. At this time, after the mounting frame plate 302 rises to the preset position, it will contact and trigger the touch switch 404 at the upper end of the interior of the fixed frame cover 4. The touch switch 404 transmits a signal to the control system, and the control system automatically sends an instruction to turn off the drive motor 101 and control the fan 402 and the electric heating tube 403 to turn on. This design avoids manual judgment and manual operation of turning off the drive motor 101, reduces human errors, and ensures that each time the needle reaches the drying station, When the device is in the drying station, the drive motor 101 can stop running in time to ensure the accuracy and stability of the equipment operation and improve the degree of automation of the production process. After the touch switch 404 realizes the automatic shutdown of the drive motor 101, when the needle body 5 reaches the drying station, the equipment can automatically and quickly enter the drying process without waiting for manual operation. At the same time, after the drying is completed, the operator starts the equipment to lower the mounting frame 302, and the drive motor 101 restarts. The entire coating processing process is closely connected and smooth. This automated control reduces time waste in the production process, improves production efficiency, and enables more needles to be processed per unit time, which helps to achieve large-scale production and meet the market demand for double puncture needles for blood glucose meters.

[0038] Example 3:

[0039] Reference Figures 1-6 , a self-cleaning double-needle surface coating treatment device, which is basically the same as Example 2. Furthermore, a rotating shaft 202 is vertically rotatably connected to the middle position inside the slurry pool 2, and the upper end of the rotating shaft 202 is fixedly connected to multiple cross bars 204 at equal intervals in a circle. The end of the cross bar 204 away from the rotating shaft 202 is symmetrically fixedly connected to multiple rows of stirring rods 205, and a driving part for driving the rotating shaft 202 to rotate is installed in the slurry pool 2.

[0040] The driving part includes a driving shell 201 and a driving blade 203. The driving shell 201 is fixedly connected to the middle position of the lower end of the slurry pool 2. The lower end of the rotating shaft 202 is rotatably connected to the inside of the driving shell 201. The driving blade 203 is fixedly connected to the rotating shaft 202 at a position inside the driving shell 201 at equal intervals around the circumference. An air inlet and an air outlet are respectively provided on the driving shell 201. The air inlet of the driving shell 201 is connected to an air inlet pipe 206, and the air outlet of the driving shell 201 is connected to an air outlet pipe 207. The air inlet pipe 206 and the air outlet pipe 207 both extend out of the slurry pool 2 at one end away from the driving shell 201.

[0041] Through the unique design of the driving part, efficient stirring and mixing of the coating slurry in the slurry pool 2 can be achieved. The air enters the driving shell 201 through the air inlet pipe 206, impacts the driving blade 203, and drives the rotating shaft 202 to rotate, thereby causing the cross bar 204 and the stirring rod 205 to move in a circular motion in the slurry pool, so that the coating slurry is completely mixed and evenly avoided. Problems such as pigment precipitation and solute stratification are avoided.

[0042] Continuous agitation can effectively prevent solvent volatilization and resin coagulation in the coating slurry, thereby extending the service life of the slurry. For example, for antibacterial coating liquid that is easy to precipitate, the traditional static method may cause silver ion particles to sink within 2 hours. However, this structure can extend the uniform suspension time of the active ingredients to more than 8 hours through dynamic mixing, reducing the frequency of slurry replacement and lowering production costs. At the same time, the uniform slurry state can ensure that each needle obtains the same amount of active ingredients during dipping, thereby improving product performance consistency.

[0043] Example 4:

[0044] Reference Figures 1-6 , a self-cleaning double-needle surface coating treatment device, which is basically the same as Example 3. Furthermore, the end of the air outlet pipe 207 away from the drive shell 201 is connected to the air inlet of the hot air chamber 401, and the airflow generated by the exhaust of the fan 402 drives the driving blade 203 to rotate, without the need for an additional power source. In traditional devices, driving the stirring structure in the slurry pool 2 usually requires an independent motor, which consumes additional electrical energy. However, this device converts the kinetic energy generated by the exhaust of the fan 402 into the rotational power of the rotating shaft 202 for stirring the coating slurry, thereby reducing energy consumption, improving the overall energy utilization efficiency of the device, and reducing production costs.

[0045] A filter housing 106 is fixedly connected to one side of the base 1 near the air inlet of the air inlet pipe 206, and a filter screen 107 is installed in the filter housing 106. The air inlet of the air inlet pipe 206 is connected to the air outlet of the filter housing 106. The airflow generated by the fan 402 must first pass through the filter screen 107 in the filter housing 106 before driving the driving blade 203 to rotate. The filter screen 107 can effectively intercept impurities such as dust, particles, and fibers in the air, preventing these impurities from being directly blown onto the coating surface of the needle body 5 with the airflow. In the traditional coating process, unfiltered airflow is likely to cause defects such as particle protrusions and pits on the coating surface. However, this filtering structure can increase the impurity interception rate to more than 98%, ensuring that the coating surface of the needle is flat and smooth, meeting the high precision requirements of medical-grade equipment.

[0046] Example 5:

[0047] Reference Figures 1-6, a self-cleaning double-needle surface coating treatment device, which is basically the same as Example 4, furthermore, an opening is provided on the side of the filter housing 106 away from the base 1, the filter screen 107 is inclined, and the inner lower end of the filter housing 106 is inclined and gradually inclined toward the side of the opening of the filter housing 106.

[0048] The filter screen 107 and the lower end of the filter housing 106 are both inclined, so that the intercepted dust, particles and other impurities automatically slide down the inclined surface of the filter screen 107 to the opening of the filter housing 106 under the action of their own gravity, thereby avoiding the reduction of filtration efficiency due to excessive dust accumulation. Taking a production line that processes 5,000 needles per day as an example, the inclined filter screen 107 can achieve a natural sliding rate of impurities exceeding 95%, and the cleaning cycle is extended from once a day to once a week.

[0049] The open design of filter housing 106, combined with the internal inclined structure, allows operators to quickly remove residual impurities by simply wiping or blowing, without having to remove filter screen 107 or use complex tools. Cleaning time is shortened from 15 minutes to less than 3 minutes, significantly reducing maintenance workload and downtime, ensuring continuous operation of the production line.

[0050] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with the preferred embodiment, it is not intended to limit the present invention.

Claims

1. A self-cleaning double-needle surface coating treatment device, comprising a base (1), characterized in that: Also includes: A screw rod (105) is symmetrically connected to both sides of the upper end of the base (1); A driving mechanism for driving the two screw rods (105) to rotate synchronously, installed in the cavity of the base (1); A lifting block (3) is threadedly connected to the screw rod (105); An installation frame plate (302) is arranged between the two lifting blocks (3), and both sides of the installation frame plate (302) are fixedly connected to the lifting blocks (3) on the same side through connecting rods (301); The mounting frame plate (302) is provided with multiple rows of mounting holes at equal intervals for mounting the needle bodies (5); A slurry pool (2) is fixedly mounted on the base (1) and is located directly below the mounting frame (302); A fixed frame cover (4) is fixedly connected to the base (1), the screw rod (105) and the slurry pool (2) are both arranged on the inner side of the fixed frame cover (4), and the upper end of the screw rod (105) is fixedly connected to the fixed frame cover (4); A hot air bin (401) is provided at the upper end of the fixed frame cover (4), a fan (402) is installed in the hot air bin (401) via a bracket, and an electric heating pipe (403) is fixedly installed at the upper end of the hot air bin (401) near the air inlet.

2. A self-cleaning double-needle surface coating treatment device according to claim 1, characterized in that: A rubber ring (303) is fixedly connected in the mounting hole of the mounting frame plate (302).

3. The self-cleaning double-needle surface coating treatment device according to claim 1, characterized in that: The connecting rod (301) is an electric cylinder.

4. A self-cleaning double-needle surface coating treatment device according to claim 1, characterized in that: The driving mechanism comprises a driving motor (101), a transmission shaft (102), a driving sprocket (103) and a transmission sprocket (104); the driving motor (101) is fixedly connected to the cavity of the base (1); the transmission shaft (102) is symmetrically rotatably connected to the cavity of the base (1); the upper ends of the two transmission shafts (102) are respectively fixedly connected to the screw rods (105) on the same side; the driving sprocket (103) is fixedly connected to the output end of the driving motor (101); the transmission sprocket (104) is fixedly connected to the transmission shaft (102); and the driving sprocket (103) and the two transmission sprockets (104) are connected via a chain.

5. The self-cleaning double-needle surface coating treatment device according to claim 1, characterized in that: The upper inner end of the fixed frame cover (4) is fixedly connected to a touch switch (404) that matches the position of the mounting frame plate (302).

6. The self-cleaning double-needle surface coating treatment device according to claim 1, characterized in that: A rotating shaft (202) is vertically rotatably connected in the middle of the slurry pool (2), a plurality of cross bars (204) are fixedly connected to the upper end of the rotating shaft (202) at equal intervals in a circle, a plurality of rows of stirring rods (205) are symmetrically fixedly connected to one end of the cross bar (204) away from the rotating shaft (202), and a driving unit for driving the rotating shaft (202) to rotate is installed in the slurry pool (2).

7. The self-cleaning double-needle surface coating treatment device according to claim 6, characterized in that: The driving portion comprises a driving shell (201) and a driving blade (203); the driving shell (201) is fixedly connected to the middle position of the lower end of the interior of the slurry pool (2); the lower end of the rotating shaft (202) is rotatably connected to the interior of the driving shell (201); the driving blade (203) is fixedly connected to the rotating shaft (202) at a position located inside the driving shell (201) at equal intervals on the circumference; an air inlet and an air outlet are respectively provided on the driving shell (201); the air inlet of the driving shell (201) is connected to an air inlet pipe (206); the air outlet of the driving shell (201) is connected to an air outlet pipe (207); and the air inlet pipe (206) and the air outlet pipe (207) both extend out of the slurry pool (2) at one end away from the driving shell (201).

8. The self-cleaning double-needle surface coating treatment device according to claim 7, characterized in that: One end of the air outlet pipe (207) away from the driving housing (201) is connected to the air inlet of the hot air bin (401).

9. The self-cleaning double-needle surface coating treatment device according to claim 7, characterized in that: A filter housing (106) is fixedly connected to one side of the base (1) close to the air inlet of the air inlet pipe (206), a filter screen (107) is installed in the filter housing (106), and the air inlet of the air inlet pipe (206) is connected to the air outlet of the filter housing (106).

10. The self-cleaning double-needle surface coating treatment device according to claim 9, characterized in that The filter housing (106) is provided with an opening on a side away from the base (1), the filter screen (107) is arranged at an angle, and the inner lower end of the filter housing (106) is arranged at an angle and gradually tilts toward the side of the opening of the filter housing (106).

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