A powder coating production grinding device and use method thereof

Abstract

The present invention discloses a powder coating production grinding device and a method for using the same, comprising a base frame and a grinding mechanism arranged above the base frame, the grinding mechanism comprising an outer shell cover, a rotating shaft, a connecting frame, a grinding roller, a grinding ring and a driving assembly, the outer shell cover is fixedly arranged above the base frame, a rotating shaft is rotatably arranged inside the outer shell cover, a grinding roller is arranged in an annular array on the outer wall of one end of the rotating shaft located inside the outer shell cover, and a grinding ring is fixedly arranged at the bottom inside the outer shell cover. The present invention aims to improve the problem that in the prior art, when the grinding roller and the grinding ring are in contact and grinding, a part of the powder coating will adhere to the grinding surface of the grinding ring of the grinding roller due to the contact and grinding between the grinding roller and the grinding ring, thereby affecting the discharge of the material. The present invention has the advantages that when the grinding roller rotates and contacts the grinding ring to grind the powder coating fragments, the powder adhered to the grinding surfaces of the grinding ring and the grinding roller can be peeled off, thereby avoiding a large amount of powder coating from adhering to the grinding surfaces of the grinding ring and the grinding roller.

Description

Technical Field

[0001] The invention relates to the technical field of powder coating grinding, and in particular to a powder coating production grinding device and a use method thereof. Background Art

[0002] Powder coating is a solid powdered synthetic resin coating composed of solid resin, pigments, fillers and additives. Unlike ordinary solvent-based coatings and water-based coatings, its dispersion medium is not solvent and water, but air. During the production of powder coating, the coating needs to be ground into powder through grinding equipment.

[0003] In the prior art, when grinding powder fragments by grinding equipment, the powder fragments are generally ground into powder by the contact between the rotating grinding roller and the outer wall of the grinding ring, and then discharged after screening. When the grinding roller and the grinding ring are in contact and grinding, a part of the powder coating will adhere to the grinding surface of the grinding roller and the grinding ring due to the contact and grinding between the grinding roller and the grinding ring, thereby causing the finished product discharge inside the grinding chamber to be not thorough during the powder coating.

[0004] In view of the above technical problems, the present invention discloses a powder coating production grinding device and a method of using the same. The present invention has the advantages that when the grinding roller rotates and contacts the grinding ring to grind the powder coating fragments, the powder adhered to the grinding surfaces of the grinding ring and the grinding roller can be peeled off, thereby avoiding a large amount of powder coating adhering to and being retained on the grinding surfaces of the grinding ring and the grinding roller. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a powder coating production grinding device and a method of using the same, so as to solve the technical problems in the prior art that, when the grinding roller and the grinding ring are in contact and grinding, a part of the powder coating will adhere to the grinding surface of the grinding ring of the grinding roller due to the contact and grinding between the grinding roller and the grinding ring, thereby causing the finished product discharge inside the grinding chamber to be not thorough enough during the powder coating. The present invention has the advantages that when the grinding roller rotates and contacts the grinding ring to grind the powder coating fragments, the powder adhered to the grinding surfaces of the grinding ring and the grinding roller can be peeled off, thereby avoiding a large amount of powder coating from adhering to the grinding surfaces of the grinding ring and the grinding roller.

[0006] The present invention is realized by the following technical scheme: the present invention discloses a powder coating production grinding device, comprising a base frame and a grinding mechanism arranged above the base frame, the grinding mechanism comprising an outer shell cover, a rotating shaft, a connecting frame, a grinding roller, a grinding ring and a driving assembly, the outer shell cover is fixedly arranged above the base frame, a feeding port is arranged at the top of the outer shell cover, a rotating shaft is rotatably arranged inside the outer shell cover, and the bottom end of the rotating shaft extends to the bottom of the base frame, a grinding roller is arranged on the outer wall of one end of the rotating shaft located inside the outer shell cover through a connecting frame annular array, a grinding ring is fixedly arranged at the bottom inside the outer shell cover, and the grinding roller is located at the inner ring of the grinding ring, the outer wall of the grinding roller contacts the inner wall of the grinding ring, and the rotation of the rotating shaft is driven by the driving assembly;

[0007] The outer wall of the rotating shaft is provided with a stripping assembly, which includes a fixed rod and a cleaning block. The fixed rod is fixedly provided on the outer wall of the rotating shaft, and the cleaning block is fixedly provided on one end of the fixed rod close to the grinding ring, and the cleaning block contacts the inner wall of the inner ring of the grinding ring.

[0008] Furthermore, a shovel plate is provided on the outer wall of the rotating shaft, a sieve plate is provided at the bottom of the outer shell cover, and the sieve plate is located below the grinding roller. A discharge cavity is provided between the sieve plate and the bottom wall of the outer shell cover, and a discharge channel is connected to the discharge cavity.

[0009] Furthermore, ventilation holes are provided inside the rotating shaft and inside the fixed rod, bristles are arranged on one side of the cleaning block, and a first blowing groove for blowing air toward the inner wall of the grinding ring is provided inside the cleaning block, and the first blowing groove is connected with the ventilation hole, the ventilation hole passes through the top end surface of the rotating shaft, a second blowing groove is provided inside the grinding ring, and an air inlet pipe is fixedly provided on the outside of the outer shell cover, and the inside of the air inlet pipe is connected with the second air blowing groove.

[0010] Furthermore, an intermittent connecting component is arranged above the outer shell cover, and the intermittent connecting component is used to make the air pipe of the external air pump intermittently connected with the air inlet pipe and the air vent respectively. The intermittent connecting component is configured to include an intermittent control part and a connecting part. The intermittent control part is used to link the rotation of the rotating shaft with the opening and closing of the connecting part, and the connecting part is used to control the air inlet pipe and the air vent to be connected with the external air pump.

[0011] Furthermore, the intermittent control part includes a swivel, a protrusion, a fixed frame, a slide rod, a guide ball, a reset spring, a conversion part and a gear group. The swivel is fixedly sleeved on one end of the rotating shaft located outside the outer shell cover. The bottom wall of the swivel is fixedly provided with a protrusion, and the protrusion is provided at the edge of the bottom wall of the swivel close to the outer circumference. The connection between the protrusion and the bottom surface of the swivel has a smooth transition, and the lowest point of the protrusion protruding downward is set to an arc shape. The upper end surface of the outer shell cover is also fixedly provided with a fixed frame, and a slide rod is longitudinally slidably provided on the fixed frame, and the slide rod is located below the protrusion. A guide ball is fixedly provided on the top of the slide rod, and the top surface of the guide ball fits with the lowest point of the protrusion. A reset spring is sleeved on the outside of the slide rod at one end above the fixed frame. A gear group is also provided above the outer shell cover, and the gear group and the slide rod are transmission connected through the conversion part. The conversion part is used to convert the longitudinal movement of the slide rod into circular motion of the gear group.

[0012] Furthermore, the gear set includes a fixed column, a driving shaft, a driving gear and a driven gear. The fixed column is fixedly arranged above the outer shell cover, and a driving shaft is coaxially rotatably arranged above the fixed column. The outer wall of the driving shaft is sleeved with the driving gear, and one side of the driving gear is meshingly connected with the driven gear, and the driven gear is rotatably arranged above the outer shell cover through the gear shaft. The connecting part is arranged above the driven gear, and the driving shaft and the sliding rod are transmission-connected through a conversion part.

[0013] Furthermore, the conversion part includes a lower pressure sleeve and a sliding claw sleeve. The lower pressure sleeve is fixedly arranged at the bottom end of the sliding rod, and the sliding claw sleeve is fixedly arranged at the top end of the driving shaft, and the driving shaft, the lower pressure sleeve, the sliding claw sleeve and the sliding rod are all concentric with each other. The lower pressure sleeve includes a fixed disk and a push rod in an annular array arranged below the fixed disk. The sliding claw sleeve includes a disk body and a wedge block in an annular array arranged above the disk body and having a beveled edge. The tip of the push rod is plugged into the beveled edge of the wedge block, and the driving gear is rotatably sleeved on the outer wall of the driving shaft through a one-way bearing, and the driving shaft is also elastically connected to the fixed column through a torsion spring.

[0014] Furthermore, the connecting part includes an intermittent blocking disk, a give way groove and a connecting valve. The intermittent blocking disk is coaxially arranged with the driven gear. The upper end surface of the intermittent blocking disk is concave and has a give way groove. The bottom wall of the give way groove smoothly transitions with the top surface of the intermittent blocking disk. A connecting valve is arranged above the intermittent blocking disk, and the connecting valve is connected with connecting pipe 1 and connecting pipe 2. The other end of connecting pipe 1 is connected to the top of the rotating shaft through a rotating joint and the interior is connected to the air vent. The other end of connecting pipe 2 is connected and communicated with the air inlet pipe. The outer wall of the connecting valve is also connected to a main pipe, and the main pipe is fixedly connected to the top of the outer shell cover through a support rod. The connecting valve includes an outer pipe, an air inlet, an air outlet, a valve plate, a valve hole, a blocking plate, a blocking column and a connecting rod. The outer pipe is fixedly arranged at one end of the main pipe, and an inlet is provided at the connection between the outer pipe and the main pipe. An air port, an air outlet is also provided on the outer wall below the outer tube, and two air outlets are provided. The two air outlets are used to connect the inside of the outer tube with connecting tube one and connecting tube two respectively. A valve plate is fixedly provided on the inside of the outer tube, and the valve plate is located between the air inlet and the air outlet. A valve hole is provided on the inside of the valve plate, and the valve hole is configured to be conical and smaller at the top and larger at the bottom. A sealing plate is provided below the valve plate, and the upper end surface of the sealing plate is fitted with the lower end surface of the valve plate. A sealing column is fixedly provided on the upper end surface of the valve plate, and the sealing column is also configured to be a column with the same inclination angle as the valve hole. The sealing column is inserted into the valve hole and fits tightly with the inner wall of the valve hole. An upper compartment and a lower compartment are provided inside the outer tube through the valve plate. The air inlet is in the upper compartment, and the air outlet is in the lower compartment. When the sealing plate and the valve plate are fitted, the sealing plate is located above the air outlet.

[0015] Furthermore, the outer circumferential outer wall of the sealing plate is slidably sealed with the inner wall of the outer tube, a connecting rod is fixedly arranged at the bottom of the sealing plate, the bottom end of the connecting rod passes through the bottom wall of the outer tube, and the connection between the connecting rod and the bottom wall of the outer tube is arranged to be a sliding seal, a ball is fixedly arranged at one end of the connecting rod located at the bottom of the outer tube, the bottom surface of the ball is fitted with the upper end surface of the intermittent sealing disk, the ball is located on the annular route formed by the give way groove when the intermittent sealing disk rotates, a control spring is also arranged above the sealing column, and the depth of the give way groove is set such that after the bottom surface of the ball contacts the bottom wall of the give way groove, the valve hole is opened, and when the bottom surface of the ball contacts the top surface of the intermittent sealing disk, the valve hole is closed.

[0016] A method for using a powder coating production grinding device comprises the following steps:

[0017] Step 1: Grinding work, pour the powder coating fragments to be ground into the outer shell from the top feed port;

[0018] Step 2: Then start the driving assembly to rotate the shaft. The rotation of the shaft drives multiple grinding rollers on the outside to move with the shaft as the center. The grinding rollers will contact the inner wall of the grinding ring to grind the powder coating fragments. At the same time, the shovel plate on the outer wall of the shaft will scoop up the powder coating fragments at the bottom and throw them to the inner wall of the grinding ring for cyclic grinding.

[0019] Step 3: The ground powder coating will enter the discharge cavity through the screening of the bottom sieve plate, and then be discharged from the discharge channel for discharge;

[0020] Step 4: With each rotation of the rotating shaft, the rotating ring will be driven to rotate. The rotating shaft rotates one circle and the rotating ring rotates one circle, so that the raised part makes the slide bar move up and down reciprocatingly. When the slide bar moves down, the driving gear will rotate an angle through the conversion part. The driving gear rotates an angle and drives the driven gear to rotate an angle, so that the intermittent blocking disk rotates an angle. Then, with the continuous rotation of the rotating shaft, the yielding groove on the intermittent blocking disk gradually moves to the bottom of the ball in a stepping state;

[0021] Step 5: After the shaft rotates a certain number of times, so that the clearance groove on the intermittent plugging disk moves to the bottom of the ball, the connecting valve is opened, and the high-pressure airflow generated by the external air pump can enter the inside of the connecting pipe 1 and the connecting pipe 2 through the main pipe, the air inlet and the air outlet, and enter the first blowing groove and the second blowing groove respectively. As the shaft rotates, the first blowing groove blows air to clean and cool the inner ring of the grinding ring, and the second blowing groove blows air to clean and cool the grinding surface of the moving grinding roller;

[0022] Step 6: When the shaft continues to rotate, the clearance groove separates from the ball, the connecting valve is closed, and the powder coating lifted up inside the outer cover can settle to the sieve plate and be discharged through screening.

[0023] The present invention has the following advantages:

[0024] The present invention provides a stripping component, so that when the rotating shaft rotates, the cleaning block at one end of the fixed rod can be driven to move, and the inner ring of the grinding ring is cleaned by the bristles on one side of the cleaning block, and air is taken in through the air vent, and then the inner ring of the grinding ring is cleaned by blowing through the first blowing groove at the connecting block, so that the sticking powder coating is cleaned by the combination of blowing and bristles, thereby improving the stripping effect, and at the same time, an intermittent connecting component is provided, so that the blowing can be intermittent, so that after the rotating shaft rotates a certain number of times, the blowing is started regularly to blow and clean the grinding ring and the grinding roller, thereby saving energy on the one hand, and avoiding long-term blowing, which causes the internal powder coating to be lifted up and above the inside of the outer shell cover and cannot be precipitated through the bottom screen plate for screening and discharging, thereby affecting the discharging. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the outer shell cover of the present invention;

[0027] Figure 3It is a schematic diagram of the top-sectional structure of the fixing rod and the cleaning block of the present invention;

[0028] Figure 4 For the present invention Figure 2 A local enlarged structural schematic diagram;

[0029] Figure 5 It is a schematic diagram of the structure of the intermittent communication component of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the rotating ring and the raised portion of the present invention;

[0031] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at B;

[0032] Figure 8 It is a schematic diagram of the structure of the torsion spring and the drive shaft of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the lower pressure sleeve and the sliding claw sleeve of the present invention in a separated state;

[0034] Fig.10 It is a schematic diagram of the internal structure of the outer tube of the present invention;

[0035] Fig.11 It is a schematic diagram of the structure of the internal closed state of the connecting valve of the present invention.

[0036] In the figure: 1, chassis; 2, grinding mechanism; 3, shovel plate; 4, screen plate; 5, discharge chamber; 6, discharge channel; 7, stripping assembly; 8, vent hole; 9, bristles; 10, first blowing slot; 11, second blowing slot; 12, feed port; 13, intermittent communication assembly; 14, retaining ring; 15, torsion spring; 16, one-way bearing; 17, gear shaft; 18, connecting pipe 1; 19, connecting pipe 2; 20, rotating joint; 21, main pipe; 22, support rod; 23, ball; 24, control spring; 25, air inlet pipe; 201, outer shell; 202, rotating shaft; 203, connecting frame; 204, grinding roller; 205, grinding ring; 206, driving assembly; 701, fixed rod; 702, cleaning block; 131, intermittent control unit; 132, connecting unit; 1311, rotating ring ; 1312, raised portion; 1313, fixed frame; 1314, slide rod; 1315, guide ball; 1316, return spring; 1317, conversion portion; 1318, gear set; 1381, fixed column; 1382, drive shaft; 1383, driving gear; 1384, driven gear; 1371, lower pressure sleeve; 1372, sliding claw sleeve; 13711, fixed plate; 1 3712, push rod; 13721, disk body; 13722, wedge block; 1321, intermittent blocking disk; 1322, give way groove; 1323, connecting valve; 13231, outer tube; 13232, air inlet; 13233, air outlet; 13234, valve plate; 13235, valve hole; 13236, blocking plate; 13237, blocking column; 13238, connecting rod. DETAILED DESCRIPTION

[0037] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] The embodiment discloses a powder coating production grinding device, such as Figure 1-Figure 11 As shown, it includes a base frame 1 and a grinding mechanism 2 arranged above the base frame 1, as shown in FIG. Figure 1-Figure 2As shown, the grinding mechanism 2 includes an outer shell 201, a rotating shaft 202, a connecting frame 203, a grinding roller 204, a grinding ring 205 and a driving assembly 206, wherein the outer shell 201 is fixedly arranged above the base frame 1, and a feed port 12 is arranged at the top of the outer shell 201, and powder coating fragments are added into the outer shell 201 through the feed port 12, and a rotating shaft 202 is rotatably arranged inside the outer shell 201, and the bottom end of the rotating shaft 202 extends to the bottom of the base frame 1, and the rotating shaft 202 is rotatably connected to the outer shell 201 and the base frame 1, and a connecting frame 203 is fixedly arranged at one end of the rotating shaft 202 located inside the outer shell 201 3, and the end of the rotating shaft 202 located inside the outer shell 201 is provided with grinding rollers 204 in a ring array through the connecting frame 203, at least two grinding rollers 204 are provided, and in this embodiment, four grinding rollers 204 are provided, in addition, a grinding ring 205 is fixedly provided at the bottom inside the outer shell 201, and the four grinding rollers 204 are all located in the inner ring of the grinding ring 205, and the outer wall of the grinding roller 204 contacts the inner wall of the grinding ring 205 to grind during operation, in addition, the rotation of the rotating shaft 202 is driven by a driving component 206, the driving component 206 is a driving motor, and the driving component 206 is arranged below the base frame 1;

[0039] It should be noted that the outer wall of the rotating shaft 202 of the grinding device is also provided with a shovel plate 3, and the shovel plate 3 and the grinding roller 204 are arranged in the same annular array on the outer wall of the rotating shaft 202, and the powder coating fragments falling to the bottom are shoveled up by the shovel plate 3 and thrown to the grinding roller 204 and the grinding ring 205, and then ground;

[0040] In order to facilitate the discharge of the ground powder, a sieve plate 4 is provided at the bottom of the outer shell 201, and the sieve plate 4 is located between the grinding roller 204 and the bottom wall of the outer shell 201, and a discharge cavity 5 is also provided between the sieve plate 4 and the bottom wall of the outer shell 201, and a discharge channel 6 is connected to the discharge cavity 5, so that the ground powder coating can enter the discharge cavity 5 after being screened by the sieve holes of the sieve plate 4, and then be discharged from the discharge channel 6 of the discharge cavity 5. Correspondingly, during operation, a fan can be connected to the discharge channel 6 to suck out the powder coating inside the discharge cavity 5;

[0041] Therefore, during grinding, the powder coating fragments are poured into the outer shell cover 201 through the upper feed port 12, and the rotating shaft 202 rotates at the same time. The rotating shaft 202 drives the grinding roller 204 to rotate with the rotating shaft 202 as the center through the connecting frame 203, and the outer wall of the grinding roller 204 and the inner wall of the grinding ring 205 grind the powder fragments. At the same time, the shovel plate 3 scoops up the fragments on the screen plate 4 and throws them to the grinding ring 205 for grinding. The ground powder coating will enter the discharge chamber 5 through the screening of the screen plate 4, and then be discharged through the discharge channel 6, while the fragments that do not meet the standards will be circulated through the shovel plate 3 to be scooped up and thrown to the grinding ring 205 for grinding.

[0042] During grinding, the grinding roller 204 contacts the inner wall of the grinding ring 205 to squeeze and grind the powder coating fragments, so that part of the powder coating is adhered to the inner wall of the grinding ring 205 and the outer wall of the grinding roller 204. After a long period of operation, the inner wall of the grinding ring 205 and the outer wall of the grinding roller 204 are prone to retain a lot of powder coating. Therefore, a stripping component 7 is provided on the outer wall of the rotating shaft 202, and the powder coating on the inner wall of the grinding ring 205 is stripped off by the stripping component 7 as the rotating shaft 202 rotates and falls onto the sieve plate 4.

[0043] Specifically, Figure 2-Figure 3 As shown, the stripping assembly 7 includes a fixed rod 701 and a cleaning block 702. The fixed rod 701 is fixedly arranged on the outer wall of the rotating shaft 202, and the cleaning block 702 is fixedly arranged on one end of the fixed rod 701 close to the inner wall of the inner ring of the grinding ring 205, and the cleaning block 702 contacts the inner wall of the inner ring of the grinding ring 205. The cleaning block 702 can be set to be a brush for cleaning, and the corresponding cleaning block 702 can also be set to be a scraper for cleaning. Therefore, when grinding, the rotating shaft 202 rotates, and the fixed rod 701 rotates with the rotating shaft 202, and the cleaning block 702 at one end of the fixed rod 701 can strip off the powder coating adhered and retained on the inner wall of the inner ring, thereby preventing more powder coating from being retained on the inner wall of the grinding ring 205.

[0044] It should be noted that the fixed rod 701 is located at the front end of the shovel plate 3 and at the rear end of the grinding roller 204 on the rotation path of the rotating shaft 202. In other words, when the rotating shaft 202 rotates, the cleaning block 702 at one end of the fixed rod 701 first cleans the grinding ring 205, and then the shovel plate 3 scoops up the powder fragments so that the grinding roller 204 at the rear end contacts the grinding ring 205 for grinding.

[0045] Considering that the grinding surfaces of the grinding ring 205 and the grinding roller 204 are both provided with grinding lines, the removal of the adhering powder by means of a scraper may not be thorough enough, and the cleaning by means of the bristles 9 may also be difficult to completely remove the powder due to the bristles 9 being too soft, resulting in incomplete cleaning;

[0046] Therefore, if Figure 2 and Figure 3As shown, a vent hole 8 is provided inside the rotating shaft 202 and inside the fixing rod 701, and bristles 9 are provided on the side of the cleaning block 702 facing the inner wall of the grinding ring 205. In addition, a first blowing groove 10 is provided inside the cleaning block 702, and one side of the first blowing groove 10 passes through the end face of the cleaning block 702 facing the inner wall of the grinding ring 205, so that the air flow inside the first blowing groove 10 can be blown to the inner wall of the grinding ring 205, and the first blowing groove 10 is connected with the vent hole 8. In addition, the vent hole 8 passes through the top end face of the rotating shaft 202. Therefore, the first blowing groove 10 can be opened on the rotating shaft 202. The top of 02 is connected with an air pipe, and the air pipe is connected with an external air pump, and the external air pump is used to supply air to the inside of the rotating shaft 202, so that the high-pressure gas can enter the inside of the vent hole 8 and be discharged through the first blowing groove 10. Therefore, when the rotating shaft 202 rotates, the inner wall of the inner ring of the grinding ring 205 is blown through the first blowing groove 10, and the powder retained on the grinding ring 205 is blown off by the high-pressure airflow. In addition, bristles 9 are provided at the first blowing groove 10, so that the peeling effect of the dust adhering to the grinding ring 205 is improved by the combination of the bristles 9 and the high-pressure airflow.

[0047] In addition, since the outer wall of the grinding ring 205 is heated by friction during grinding, which affects the grinding effect during subsequent grinding, the grinding ring 205 can be cooled by blowing high-pressure airflow toward the grinding ring 205.

[0048] Through the above arrangement, when the grinding work is performed, while the rotating shaft 202 rotates, one end of the fixed rod 701 can blow air to the inner ring of the grinding ring 205, thereby blowing off the adhering powder on the grinding surface of the inner wall of the grinding ring 205, and in order to peel off the adhering powder on the grinding surface of the grinding roller 204, Figure 1 , Figure 2 , Figure 4 As shown, a second blowing groove 11 is provided at a place inside the grinding ring 205, and correspondingly, an air inlet pipe 25 is fixedly provided outside the outer shell 201, and one end of the air inlet pipe 25 fixedly provided with the outer shell 201 extends to the inside of the outer shell 201 and is communicated with the second blowing groove 11, and the other end of the air inlet pipe 25 is also supplied with air through an air pump, so that when the grinding work is performed, when the rotating shaft 202 drives the grinding roller 204 to move with the rotating shaft 202 as the center, the second blowing groove 11 can blow out a high-pressure airflow to clean the grinding surface of the grinding roller 204 from the adhering powder, and cool the grinding surface of the grinding roller 204 at the same time;

[0049] When the grinding work is performed, the first blowing slot 10 and the second blowing slot 11 blow air to the grinding ring 205 and the grinding roller 204 respectively, and then there will be a high-pressure airflow so that a large amount of powder inside the outer shell 201 is lifted for a long time, and the powder coating will be dispersed above the inner part of the outer shell 201, so that the powder cannot be settled at the bottom, thereby affecting the screening and discharging of the powder coating, and when the grinding work is performed, the amount of powder coating adhesion on the grinding ring 205 and the grinding roller 204 changes from small to large, therefore, the grinding surface cleaning of the grinding ring 205 and the grinding roller 204 does not need to be carried out for a long time, and the grinding surface cleaning of the grinding ring 205 and the grinding roller 204 only needs to be intermittently cleaned regularly;

[0050] Therefore, in order to allow the first blowing slot 10 and the second blowing slot 11 to perform blowing intermittently, as Figure 1 As shown, an intermittent communication component 13 is provided above the outer shell cover 201, so that the air pipe of the external air pump and the air inlet pipe 25 are intermittently connected to the vent hole 8 respectively, so as to realize intermittent air blowing. In general, the powder adhering to the grinding surface of the grinding ring 205 and the grinding roller 204 will increase with the increase of the number of grinding times. Therefore, the intermittent time of the intermittent air blowing is based on the number of rotations of the rotating shaft 202. For example, after the rotating shaft 202 rotates ten times, that is, the grinding roller 204 moves one circle along the inner ring of the grinding ring 205. As the number of circles increases, the number of times the grinding roller 204 contacts and grinds with the grinding ring 205 increases, and then the powder adhering to the grinding surface of the grinding ring 205 and the grinding roller 204 will also increase. And with the continuous extrusion contact, the adhesion of the adhering powder will gradually increase, and as the number of grinding times increases, the temperature of the grinding surface of the grinding ring 205 and the grinding roller 204 will also increase.

[0051] In order to accurately control the intermittent time of the intermittent communication component 13 according to the number of rotations of the rotating shaft 202, the intermittent communication component 13 is configured to include an intermittent control part 131 and a communication part 132, wherein the intermittent control part 131 is used to link the rotation of the rotating shaft 202 with the opening and closing of the communication part 132, so that after the rotating shaft 202 rotates a certain number of times, that is, after the grinding roller 204 moves a certain number of times along the grinding ring 205, the intermittent control part 131 controls the communication part 132 to connect the air inlet pipe 25 and the air vent 8 with the external air pump, thereby performing air blowing cleaning;

[0052] Specifically, Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7As shown, the intermittent control unit 131 includes a rotating ring 1311, a protrusion 1312, a fixing frame 1313, a sliding rod 1314, a guide ball 1315, a reset spring 1316, a conversion unit 1317 and a gear set 1318, wherein the rotating ring 1311 is fixedly sleeved on the top of the rotating shaft 202 at one end outside the outer shell cover 201, and the bottom wall of the rotating ring 1311 is fixedly provided with a protrusion 1312, and the protrusion 1312 is provided at the edge of the bottom wall of the rotating ring 1311 close to the outer circumference, and the protrusion 1312 is set as a triangle, and the protrusion The connection between the protrusion 1312 and the bottom surface of the rotating ring 1311 is smoothly transitioned with the bottom surface of the rotating ring 1311, and the lowest point of the protrusion 1312 protruding downward is set to an arc shape. The upper end surface of the outer shell cover 201 is also fixedly provided with a fixing frame 1313, and a sliding rod 1314 is longitudinally slidably provided on the fixing frame 1313, and the sliding rod 1314 is located below the protrusion 1312. A guide ball 1315 is fixedly provided on the top of the sliding rod 1314, and the top surface of the guide ball 1315 is in contact with the lowest point of the protrusion 1312. In addition, the sliding rod 1314 is located on the fixing frame 1 The outer side of the upper end of the slide rod 1314 is sleeved with a return spring 1316, and a retaining ring 14 is arranged above the return spring 1316, and the retaining ring 14 is fixedly sleeved on the outer wall of the slide rod 1314, and the retaining ring 14 is located below the guide ball 1315. The bottom end of the return spring 1316 contacts the fixed frame 1313, so that when the rotating shaft 202 rotates, the rotating shaft 202 drives the rotating ring 1311 to rotate, and the rotating ring 1311 drives the protruding portion 1312 to move with the rotating shaft 202 as the center of the circle, and when the rotating ring 1311 rotates, the protruding portion 1312 312 will intermittently contact with the guide ball 1315, and the guide ball 1315 will be pressed down by the protrusion 1312. When the protrusion 1312 is separated from the guide ball 1315, the slide bar 1314 is moved up by the action of the reset spring 1316, and then the slide bar 1314 moves up and down reciprocatingly with the rotation of the rotating ring 1311. The bottom surface of the rotating ring 1311 is provided with a protrusion 1312. Therefore, when the rotating ring 1311 rotates one circle, the slide bar 1314 moves up and down reciprocatingly once under the control of the protrusion 1312;

[0053] A gear set 1318 is also disposed above the outer shell 201, and the gear set 1318 is in transmission connection with the slide bar 1314 via a conversion portion 1317, and the conversion portion 1317 converts the longitudinal movement of the slide bar 1314 into the circular movement of the gear set 1318;

[0054] More specifically, Figure 5-Figure 8As shown, the gear set 1318 includes a fixed column 1381, a driving shaft 1382, a driving gear 1383 and a driven gear 1384, wherein the fixed column 1381 is fixedly arranged above the outer housing cover 201, and the driving shaft 1382 is concentrically arranged above the fixed column 1381, and the driving shaft 1382 is rotatably connected to the fixed column 1381, and the outer wall of the driving shaft 1382 is sleeved with a driving gear 1383, and one side of the driving gear 1383 is meshedly connected with a driven gear 1384, and the driven gear 1384 is rotatably arranged above the outer housing cover 201 through the gear shaft 17, and a connecting portion 132 is arranged above the gear shaft 17 of the driven gear 1384;

[0055] The driving shaft 1382 and the sliding rod 1314 are connected to each other through the conversion part 1317, so that when the sliding rod 1314 moves downward, the driving shaft 1382 can be driven to rotate, and then the driving shaft 1382 drives the driven gear 1384 to rotate through the driving gear 1383;

[0056] like Figure 5-Figure 9 As shown, the conversion part 1317 specifically includes a lower pressure sleeve 1371 and a sliding claw sleeve 1372, wherein the lower pressure sleeve 1371 is fixedly arranged at the bottom end of the slide rod 1314, and the sliding claw sleeve 1372 is fixedly arranged at the top end of the driving shaft 1382, and the driving shaft 1382, the lower pressure sleeve 1371, the sliding claw sleeve 1372 and the slide rod 1314 are all concentric with each other, and the lower pressure sleeve 1371 specifically includes a fixed disk 13711 and a plurality of top rods 13712 arranged in an annular array below the fixed disk 13711, and the sliding claw sleeve 1372 specifically includes a disk The disc body 13721 and the annular array are arranged on the top of the disc body 13721 and the wedge block 13722 with a bevel, and the tip of the push rod 13712 is plugged into the bevel of the wedge block 13722. Specifically, when the lower pressure sleeve 1371 is separated from the sliding claw sleeve 1372, the tip of the push rod 13712 and the top of the bevel of the wedge block 13722 are on the same vertical axis, and when the lower pressure sleeve 1371 moves downward, the push rod 13712 will contact the bevel of the wedge block 13722, and as it continues to move downward, the sliding claw sleeve 1372 will rotate to one side;

[0057] Therefore, by setting the conversion part 1317, the downward movement of the slide bar 1314 can be converted into the rotation of the drive shaft 1382, and by setting the lower pressure sleeve 1371 and the sliding claw sleeve 1372, the slide bar 1314 moves down once and the drive shaft 1382 rotates by one angle. Therefore, as the rotating shaft 202 rotates one circle, the slide bar 1314 moves down once, and then the slide bar 1314 moves down so that the lower pressure sleeve 1371 contacts the sliding claw sleeve 1372, thereby causing the drive shaft 1382 to rotate by one angle, so that the driving gear 1383 rotates by one angle to drive the driven gear 1384 to rotate by one angle.

[0058] In addition, after the slide bar 1314 moves upward, in order to make the conversion part 1317 continue to control the driving shaft 1382 to rotate as the slide bar 1314 moves downward, as shown in FIG. Figure 5-Figure 8 As shown, the driving gear 1383 is configured to be rotatably sleeved on the outer wall of the driving shaft 1382, and the driving gear 1383 is rotatably sleeved on the outer wall of the driving shaft 1382 through the one-way bearing 16, and the driving shaft 1382 is also elastically connected to the fixed column 1381 through the torsion spring 15. Specifically, one end of the torsion spring 15 is fixedly connected to the driving shaft 1382, and the other end of the torsion spring 15 is fixedly connected to the fixed column 1381, so that the driving shaft 1382 rotates as the sliding rod 1314 moves downward. After the sliding rod 1314 moves upward, the driving shaft 1382 can be reset through the torsion spring 15. The reset of the driving shaft 1382 can drive the sliding claw sleeve 1372 to reset, so that the conversion part 1317 can cyclically control the rotation of the driving shaft 1382 as the sliding rod 1314 moves downward;

[0059] When the driving shaft 1382 is reset and rotated, in order to prevent the active gear 1383 from driving the driven gear 1384 to reset and rotate, the one-way bearing 16 is set so that the rotation connection between the driving shaft 1382 and the active gear 1383 can only rotate in one direction. Specifically, when the sliding rod 1314 moves downward, the driving shaft 1382 rotates to drive the active gear 1383 to rotate. When the sliding rod 1314 moves upward, the driving shaft 1382 is reset through the torsion spring 15. At this time, the driving shaft 1382 rotates through the one-way bearing 16 so that the driving shaft 1382 rotates inside the active gear 1383 and cannot have a large torque to drive the active gear 1383 to rotate. As a result, when the driving shaft 1382 is reset and rotated, the driven gear 1384 remains stationary, so that each time the sliding rod 1314 moves downward, the driven gear 1384 will only step by an angle in one direction.

[0060] like Figure 5-Figure 6As shown, the connecting portion 132 specifically includes an intermittent blocking disk 1321, a give-way groove 1322 and a connecting valve 1323, wherein the intermittent blocking disk 1321 is coaxially arranged with the driven gear 1384, and the upper end surface of the intermittent blocking disk 1321 is concavely provided with a give-way groove 1322, and the give-way groove 1322 is arranged as a number of equally divided fan-shaped grooves of the intermittent blocking disk 1321, and the bottom wall of the give-way groove 1322 smoothly transitions with the top surface of the intermittent blocking disk 1321, and in addition, a connecting valve 1323 is arranged above the intermittent blocking disk 1321, and the connecting valve 1323 is connected to a connecting pipe 18 and a connecting pipe 2 19, and the other end of the connecting pipe 18 is rotated The adapter 20 is connected to the top of the rotating shaft 202, the interior of the connecting pipe 18 is connected to the vent hole 8, and the other end of the connecting pipe 2 19 is connected to the air inlet pipe 25. Correspondingly, the outer wall of the connecting valve 1323 is also connected to the main pipe 21, and the outer wall of the main pipe 21 is fixedly provided with a support rod 22, and the support rod 22 is fixedly connected to the top wall of the outer shell cover 201. By providing the main pipe 21, the external air pump can be connected to the main pipe 21, so that the high-pressure airflow of the external air pump can enter the interior of the connecting valve 1323 through the main pipe 21, and is discharged into the vent hole 8 and the air inlet pipe 25 by the connecting pipe 1 18 and the connecting pipe 2 19 respectively for blowing and cleaning;

[0061] In order to make the main pipe 21 and the connecting pipe 18 and the connecting pipe intermittently connected, such as 5, Figure 10-11As shown, the connecting valve 1323 is configured to include an outer tube 13231, an air inlet 13232, an air outlet 13233, a valve plate 13234, a valve hole 13235, a blocking plate 13236, a blocking column 13237 and a connecting rod 13238, wherein the outer tube 13231 is fixedly arranged at one end of the main tube 21, and the outer tube 13231 is specifically configured as a pipeline closed at both ends, and an air inlet 13232 is opened at the connection between the outer tube 13231 and the main tube 21, so that The interior of the main pipe 21 is connected to the interior of the outer pipe 13231, and an air outlet 13233 is also opened on the outer wall below the outer pipe 13231, and two air outlets 13233 are provided, the two air outlets 13233 are at the same level, and the two air outlets 13233 are used to make the interior of the outer pipe 13231 communicate with the connecting pipe 1 18 and the connecting pipe 2 19 respectively, and a valve plate 13234 is fixedly provided inside the outer pipe 13231, and the valve plate 13234 is located at the air inlet 1323 2 and the air outlet 13233, and a valve hole 13235 is opened inside the valve plate 13234, and the valve hole 13235 is set in a conical shape, specifically, small at the top and large at the bottom. A blocking plate 13236 is set below the valve plate 13234, and the upper end surface of the blocking plate 13236 is in contact with the lower end surface of the valve plate 13234. In addition, a sealing pad can be set on the side where the blocking plate 13236 and the valve plate 13234 are in contact, thereby improving the sealing of the blocking plate 13236 to the valve hole 13235 , and a blocking column 13237 is fixedly provided on the upper end surface of the valve plate 13234, and the blocking column 13237 is also set as a column with the same inclination angle as the valve hole 13235, and the blocking column 13237 is inserted into the valve hole 13235, and the outer wall of the blocking column 13237 is tightly fitted with the inner wall of the valve hole 13235, so that when the valve plate 13234 blocks the valve hole 13235, the blocking column 13237 is inserted into the valve hole 13235 for secondary blocking, thereby improving the sealing performance;

[0062] In addition, the interior of the outer tube 13231 is separated into an upper compartment and a lower compartment by the valve plate 13234, and the air inlet 13232 is in the upper compartment, and the air outlet 13233 is in the lower compartment. When the blocking plate 13236 is in contact with the valve plate 13234, the blocking plate 13236 is located above the air outlet 13233. Therefore, when communication is required, it is only necessary to move the blocking plate 13236 downward to separate the blocking plate 13236 from the valve plate 13234, and the blocking column 13237 from the valve hole 13235, so that the high-pressure airflow entering at the air inlet 13232 can enter the lower compartment through the valve hole 13235, and then be discharged from the air outlet 13233.

[0063] It should be noted that the outer circumferential outer wall of the sealing plate 13236 is slidably sealed with the inner wall of the outer tube 13231. In addition, a connecting rod 13238 is fixedly arranged at the bottom of the sealing plate 13236, and the bottom end of the connecting rod 13238 passes through the bottom wall of the outer tube 13231, and the connection between the connecting rod 13238 and the bottom wall of the outer tube 13231 is arranged to be slidably sealed. A ball 23 is fixedly arranged at one end of the connecting rod 13238 located at the bottom of the outer tube 13231, and the bottom surface of the ball 23 is fitted with the upper end surface of the intermittent sealing disk 1321. In addition, the ball 23 is located on the annular route formed by the clearance groove 1322 when the intermittent sealing disk 1321 rotates. In other words, when the intermittent sealing disk 1321 rotates, the clearance groove 1322 will move to the ball 23, and then the ball 23 will fall into the inside of the making way groove 1322, thereby causing the connecting rod 13238 to move downward, and the connecting rod 13238 drives the blocking plate 13236 and the blocking column 13237 to move downward, so that the valve hole 13235 is opened, so that the air inlet 13232 is connected with the air outlet 13233. In addition, a control spring 24 is arranged above the blocking column 13237, and the top of the control spring 24 contacts the top wall of the outer tube 13231. Therefore, the blocking plate 13236 can be rebounded by the control spring 24. When the making way groove 1322 moves to the bottom of the ball 23 with the rotation of the intermittent blocking disk 1321, the connecting rod 13238 is moved downward by the action of the control spring 24, thereby opening the valve hole 13235.

[0064] It should be noted that the depth of the easing groove 1322 is set such that, when the bottom surface of the ball 23 contacts the bottom wall of the easing groove 1322, the connecting rod 13238 moves downward, the blocking column 13237 is separated from the valve hole 13235, the blocking plate 13236 is separated from the valve plate 13234, and the blocking plate 13236 moves to the bottom of the air outlet 13233. When the bottom surface of the ball 23 contacts the top surface of the intermittent blocking disk 1321, the blocking plate 13236 is tightly fitted with the valve plate 13234, and the blocking column 13237 is inserted into the valve hole 13235, and the control spring 24 is compressed.

[0065] Therefore, by setting the number of the circumferential giving grooves 1322 on the intermittent sealing disk 1321, the connecting valve 1323 is controlled to open after the rotating shaft 202 rotates a certain number of times, so that the connecting pipe 1 18 and the connecting pipe 2 19 can take in air, and then the grinding ring 205 and the grinding roller 204 are blown and cleaned. Since the rotating shaft 202 rotates one circle, the driven gear 1384 rotates one angle. Therefore, after the giving groove 1322 moves to the bottom of the ball 23, the connecting valve 1323 hole is opened for air blowing and cleaning. It can be ensured that the connecting valve 1323 is closed after at least one rotation of the rotating shaft 202, thereby ensuring that at least one circle of air blowing cleaning can be performed on the grinding ring 205 and the grinding roller 204, so that the cleaning is more thorough and omissions are avoided.

[0066] A method for using a powder coating production grinding device comprises the following steps:

[0067] Step 1: Grinding is performed, and the powder coating fragments to be ground are poured into the inner part of the outer shell 201 from the feed port 12 at the top;

[0068] Step 2: Then, the driving assembly 206 is started to rotate the rotating shaft 202. The rotating shaft 202 drives the external grinding rollers 204 to move with the rotating shaft 202 as the center of the circle. The grinding rollers 204 will contact the inner wall of the grinding ring 205 to grind the powder coating fragments. At the same time, the shovel plate 3 on the outer wall of the rotating shaft 202 will scoop up the powder coating fragments at the bottom and throw them to the inner wall of the grinding ring 205 for cyclic grinding.

[0069] Step 3: The ground powder coating will enter the discharge chamber 5 through the screening of the bottom sieve plate 4, and then be discharged from the discharge channel 6 for discharge;

[0070] Step 4: With each rotation of the rotating shaft 202, the rotating ring 1311 is driven to rotate. The rotating shaft 202 rotates one circle and the rotating ring 1311 rotates one circle, so that the protrusion 1312 causes the slide bar 1314 to move up and down reciprocatingly. When the slide bar 1314 moves down, the conversion part 1317 causes the driving gear 1383 to rotate an angle. The driving gear 1383 rotates an angle and drives the driven gear 1384 to rotate an angle, so that the intermittent blocking disk 1321 rotates an angle. Then, with the continuous rotation of the rotating shaft 202, the giving way groove 1322 on the intermittent blocking disk 1321 gradually moves to the bottom of the ball 23 in a stepping state;

[0071] Step 5: When the rotating shaft 202 rotates a certain number of times, the recess 1322 on the intermittent blocking disk 1321 moves to the bottom of the ball 23, and the connecting rod 13238 moves downward through the control spring 24, thereby opening the valve hole 13235, and the air outlet 13233 and the air inlet 13232 can be connected through the valve hole 13235. Therefore, the high-pressure airflow generated by the external air pump can be respectively discharged through the main pipe 21, the air inlet 13232 and the air outlet 13233. Enter the inside of the connecting pipe 18 and the connecting pipe 2 19, and enter the first blowing groove 10 and the second blowing groove 11 respectively, and as the rotating shaft 202 rotates, the fixing rod 701 moves with the rotating shaft 202, so that the first blowing groove 10 can blow and clean the inner ring of the grinding ring 205 and cool it at the same time, and when the grinding roller 204 moves with the rotation of the rotating shaft 202, it moves to the second blowing groove 11 and is cleaned and cooled by the airflow blown out of the second blowing groove 11;

[0072] Step six: When the rotating shaft 202 continues to rotate, the displacement groove 1322 is separated from the ball 23, so that the ball 23 contacts the upper end surface of the intermittent sealing disk 1321 again, thereby driving the connecting rod 13238 to move upward through the upward movement of the ball 23. The connecting rod 13238 moves the sealing plate 13236 upward to seal the valve hole 13235, and then closes the connecting valve 1323, stops blowing, and allows the powder coating lifted from the inside of the outer shell cover 201 to settle to the screen plate 4 and be discharged through screening.

[0073] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A powder coating production grinding device, comprising a base frame (1) and a grinding mechanism (2) arranged above the base frame (1), characterized in that: The grinding mechanism (2) comprises an outer shell cover (201), a rotating shaft (202), a connecting frame (203), a grinding roller (204), a grinding ring (205) and a driving assembly (206); the outer shell cover (201) is fixedly arranged above the base frame (1); a feed port (12) is arranged at the top of the outer shell cover (201); a rotating shaft (202) is rotatably arranged inside the outer shell cover (201), and the bottom end of the rotating shaft (202) extends to the bottom of the base frame (1); grinding rollers (204) are arranged in an annular array on the outer wall of one end of the rotating shaft (202) located inside the outer shell cover (201) via the connecting frame (203); a grinding ring (205) is fixedly arranged at the bottom of the inner shell cover (201); the grinding rollers (204) are located in the inner ring of the grinding ring (205); the outer wall of the grinding roller (204) and the grinding ring (205) are connected to each other. The rotation of the rotating shaft (202) is driven by a driving assembly (206); a stripping assembly (7) is provided on the outer wall of the rotating shaft (202); the stripping assembly (7) comprises a fixing rod (701) and a cleaning block (702); the fixing rod (701) is fixedly provided on the outer wall of the rotating shaft (202); a cleaning block (702) is fixedly provided on one end of the fixing rod (701) close to the grinding ring (205); and the cleaning block (702) contacts the inner wall of the inner ring of the grinding ring (205); a shovel plate (3) is also provided on the outer wall of the rotating shaft (202); a sieve plate (4) is provided at the bottom of the outer shell cover (201); and the sieve plate (4) is located below the grinding roller (204); a discharge cavity (5) is also provided between the sieve plate (4) and the bottom wall of the outer shell cover (201); and a discharge channel (6) is connected to the discharge cavity (5); The interior of the rotating shaft (202) and the interior of the fixing rod (701) are both provided with ventilation holes (8); a brush (9) is provided on one side of the cleaning block (702); a first blowing groove (10) for blowing air toward the inner wall of the grinding ring (205) is also provided inside the cleaning block (702); the first blowing groove (10) is communicated with the ventilation hole (8); the ventilation hole (8) passes through the top end surface of the rotating shaft (202); a second blowing groove (11) is provided inside the grinding ring (205); an air inlet pipe (25) is fixedly provided outside the outer shell (201); and the air inlet pipe (25) is provided inside the inner wall of the grinding ring (205). The outer shell (201) is connected to the second blowing groove (11); an intermittent communication component (13) is arranged above the outer shell cover (201); the intermittent communication component (13) is used to make the air pipe of the external air pump intermittently connected with the air inlet pipe (25) and the air vent (8) respectively; the intermittent communication component (13) is configured to include an intermittent control part (131) and a communication part (132); the intermittent control part (131) is used to link the rotation of the rotating shaft (202) with the opening and closing of the communication part (132); the communication part (132) is used to control the air inlet pipe (25) and the air vent (8) to communicate with the external air pump; The intermittent control part (131) comprises a rotating ring (1311), a protrusion (1312), a fixing frame (1313), a sliding rod (1314), a guide ball (1315), a return spring (1316), a conversion part (1317) and a gear set (1318). The rotating ring (1311) is fixedly sleeved on one end of the rotating shaft (202) located outside the outer shell cover (201). The bottom wall of the rotating ring (1311) is fixedly provided with a protrusion (1312), and the protrusion (1312) is arranged at the edge of the bottom wall of the rotating ring (1311) close to the outer circumference. The connection between the protrusion (1312) and the bottom surface of the rotating ring (1311) is smoothly transitioned, and the lowest point of the protrusion (1312) protruding downward is set in an arc shape. The upper end surface of the outer shell cover (201) is also fixedly provided with a fixed A fixing frame (1313), a sliding rod (1314) is longitudinally slidably arranged on the fixing frame (1313), and the sliding rod (1314) is located below the protrusion (1312), a guide ball (1315) is fixedly arranged on the top of the sliding rod (1314), and the top surface of the guide ball (1315) is in contact with the lowest point of the protrusion (1312), and a return spring (1316) is sleeved on the outer end of the sliding rod (1314) located above the fixing frame (1313), and a gear group (1318) is further arranged above the outer shell cover (201), and the gear group (1318) and the sliding rod (1314) are connected to each other through a conversion part (1317), and the conversion part (1317) is used to convert the longitudinal movement of the sliding rod (1314) into the circular motion of the gear group (1318); The gear set (1318) comprises a fixed column (1381), a driving shaft (1382), a driving gear (1383) and a driven gear (1384); the fixed column (1381) is fixedly arranged above the outer shell cover (201); a driving shaft (1382) is coaxially rotatably arranged above the fixed column (1381); the outer wall of the driving shaft (1382) is sleeved with a driving gear (1383); one side of the driving gear (1383) is meshingly connected with a driven gear (1384); the driven gear (1384) is rotatably arranged above the outer shell cover (201) via a gear shaft (17); the connecting portion (132) is arranged above the driven gear (1384); and the driving shaft (1382) and the sliding rod (1314) are transmission-connected via a conversion portion (1317); The conversion part (1317) includes a lower pressure sleeve (1371) and a sliding claw sleeve (1372), wherein the lower pressure sleeve (1371) is fixedly arranged at the bottom end of the sliding rod (1314), and the sliding claw sleeve (1372) is fixedly arranged at the top end of the driving shaft (1382), and the driving shaft (1382), the lower pressure sleeve (1371), the sliding claw sleeve (1372) and the sliding rod (1314) are all concentric with each other, and the lower pressure sleeve (1371) includes a fixed disk (13711) and an annular array arranged below the fixed disk (13711). The sliding claw sleeve (1372) comprises a disk body (13721) and a wedge block (13722) with a beveled edge and arranged in an annular array above the disk body (13721). The tip of the pushing rod (13712) is plugged into the beveled edge of the wedge block (13722). The driving gear (1383) is rotatably sleeved on the outer wall of the driving shaft (1382) through a one-way bearing (16). The driving shaft (1382) is also elastically connected to the fixing column (1381) through a torsion spring (15); The communication portion (132) comprises an intermittent blocking disk (1321), a clearance groove (1322) and a communication valve (1323); the intermittent blocking disk (1321) is coaxially arranged with the driven gear (1384); the upper end surface of the intermittent blocking disk (1321) is concavely provided with a clearance groove (1322); the bottom wall of the clearance groove (1322) and the top surface of the intermittent blocking disk (1321) are smoothly transitioned; a communication valve (1323) is arranged above the intermittent blocking disk (1321); and the communication valve (1323) is connected to a communication pipe 1 (18) and a communication pipe 2 (19); the other end of the communication pipe 1 (18) is connected to the top end of the rotating shaft (202) via a rotating joint (20) and the interior is connected to the ventilation pipe (1323). The connecting valve (1323) is connected to a hole (8), the other end of the connecting pipe (19) is connected to and communicated with an air inlet pipe (25), the outer wall of the connecting valve (1323) is also connected to a main pipe (21), and the main pipe (21) is fixedly connected to the upper part of the outer shell (201) through a support rod (22), the connecting valve (1323) comprises an outer pipe (13231), an air inlet (13232), an air outlet (13233), a valve plate (13234), a valve hole (13235), a blocking plate (13236), a blocking column (13237) and a connecting rod (13238), the outer pipe (13231) is fixedly arranged at one end of the main pipe (21), and an air inlet is provided at the connection between the outer pipe (13231) and the main pipe (21). (13232), an air outlet (13233) is further provided on the outer wall below the outer tube (13231), and two air outlets (13233) are provided, and the two air outlets (13233) are used to connect the inside of the outer tube (13231) with the connecting tube 1 (18) and the connecting tube 2 (19) respectively, a valve plate (13234) is fixedly provided inside the outer tube (13231), and the valve plate (13234) is located between the air inlet (13232) and the air outlet (13233), a valve hole (13235) is provided inside the valve plate (13234), and the valve hole (13235) is configured to be conical and smaller at the top and larger at the bottom, and a blocking plate (13235) is provided below the valve plate (13234). 236), and the upper end surface of the blocking plate (13236) is in contact with the lower end surface of the valve plate (13234), the upper end surface of the valve plate (13234) is fixedly provided with a blocking column (13237), and the blocking column (13237) is also configured as a column having the same inclination angle as the valve hole (13235), the blocking column (13237) is inserted into the valve hole (13235) and is in close contact with the inner wall of the valve hole (13235), the outer tube (13231) is provided with an upper compartment and a lower compartment through the valve plate (13234), the air inlet (13232) is located in the upper compartment, and the air outlet (13233) is located in the lower compartment, and when the blocking plate (13236) is in contact with the valve plate (13234),The blocking plate (13236) is located above the air outlet (13233); the outer circumferential outer wall of the blocking plate (13236) is slidably sealed with the inner wall of the outer tube (13231); a connecting rod (13238) is fixedly provided at the bottom of the blocking plate (13236); the bottom end of the connecting rod (13238) passes through the bottom wall of the outer tube (13231); and the connection between the connecting rod (13238) and the bottom wall of the outer tube (13231) is provided as a sliding seal; and a ball (23) is fixedly provided at one end of the connecting rod (13238) located at the bottom of the outer tube (13231). The bottom surface of the ball (23) is in contact with the upper end surface of the intermittent blocking disk (1321), and the ball (23) is located on the annular route formed by the clearance groove (1322) when the intermittent blocking disk (1321) rotates. A control spring (24) is also provided above the blocking column (13237), and the depth of the clearance groove (1322) is set such that after the bottom surface of the ball (23) contacts the bottom wall of the clearance groove (1322), the valve hole (13235) is opened, and when the bottom surface of the ball (23) contacts the top surface of the intermittent blocking disk (1321), the valve hole (13235) is closed.

2. A method for using a powder coating production grinding device according to claim 1, characterized in that: The following steps are involved: Step 1: Grinding is performed, and the powder coating fragments to be ground are poured into the inner part of the outer shell (201) from the feed port (12) at the top; Step 2: Then, the driving assembly (206) is started to rotate the rotating shaft (202). The rotation of the rotating shaft (202) drives the external grinding rollers (204) to move with the rotating shaft (202) as the center of the circle. The grinding rollers (204) will contact the inner wall of the grinding ring (205) to grind the powder coating fragments. At the same time, the shovel plate (3) on the outer wall of the rotating shaft (202) will scoop up the powder coating fragments at the bottom and throw them to the inner wall of the grinding ring (205) for cyclic grinding. Step 3: The powder coating after grinding will be screened by the bottom screen plate (4) and enter the discharge chamber (5), and then discharged from the discharge channel (6) for discharge; Step 4: With each rotation of the rotating shaft (202), the rotating ring (1311) is driven to rotate. The rotating shaft (202) rotates one circle and drives the rotating ring (1311) to rotate one circle, thereby causing the protrusion (1312) to reciprocate up and down the slide bar (1314). When the slide bar (1314) moves downward, the driving gear (1383) is rotated by an angle through the conversion part (1317). The driving gear (1383) rotates by an angle and drives the driven gear (1384) to rotate by an angle, thereby causing the intermittent blocking disk (1321) to rotate by an angle. Then, with the continuous rotation of the rotating shaft (202), the clearance groove (1322) on the intermittent blocking disk (1321) gradually moves to the bottom of the ball (23) in a stepping state; Step 5: When the rotating shaft (202) rotates a certain number of times, so that the clearance groove (1322) on the intermittent blocking disk (1321) moves to the bottom of the ball (23), the connecting valve (1323) is opened, and the high-pressure airflow generated by the external air pump can enter the inside of the connecting pipe 1 (18) and the connecting pipe 2 (19) through the main pipe (21), the air inlet (13232) and the air outlet (13233), and enter the first blowing groove (10) and the second blowing groove (11) respectively. As the rotating shaft (202) rotates, the first blowing groove (10) blows air to clean and cool the inner ring of the grinding ring (205), and the second blowing groove (11) blows air to clean and cool the grinding surface of the moving grinding roller (204); Step 6: When the rotating shaft (202) continues to rotate, the clearance groove (1322) is separated from the ball (23), and the connecting valve (1323) is closed. The powder coating lifted up inside the outer shell cover (201) can settle to the sieve plate (4) and be discharged through screening.

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