Low-volatility green paint grinding device and grinding process

Abstract

The application provides a low-volatility green paint grinding device and grinding process, and relates to the field of paint grinding. The device comprises a base, a grinding cylinder arranged above the base, a grinding bottom plate fixedly connected to the bottom of the grinding cylinder, a grinding disc arranged above the center of the grinding bottom plate and matched with the grinding bottom plate, a rotating shaft fixedly connected to the top center of the grinding disc, a cross beam arranged above the rotating shaft, and a motor fixedly connected to the cross beam. After the initial grinding is completed, the electric push rod is extended, the cross beam is lifted when the electric push rod is extended, the rotating shaft and the grinding disc at the bottom end of the rotating shaft are lifted by the cross beam, the fixed gear ring is lifted by the rotating shaft, the top gear of the fixed gear ring and the bottom gear of the movable gear ring are engaged with each other, the motor is slowly rotated, the rotating shaft is rotated to drive the fixed gear ring to rotate, and the fixed gear ring drives the movable gear ring to rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint grinding, in particular to a low-volatility green paint grinding device and grinding process. BACKGROUND

[0002] Low-volatility green paint refers to a kind of green paint with low content of volatile organic compounds in the paint. In the paint production process, the paint needs to be ground.

[0003] In the preparation process of low-volatility green paint, the paint needs to be ground to make the paint particles fine and uniform, so as to improve the flatness and brightness of the painted surface. The common low-volatility green paint grinding device has uneven grinding effect on the paint during grinding, which affects the subsequent use effect of the paint. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a low-volatility green paint grinding device and grinding process, which solves the problems raised in the background art.

[0006] (II) Technical solutions

[0007] To achieve the above purpose, the present application is realized by the following technical solutions: a low-volatility green paint grinding device, comprising a base, a grinding cylinder arranged above the base, a grinding bottom plate fixedly connected to the bottom of the grinding cylinder, a grinding disc matched with the grinding bottom plate arranged above the center of the grinding bottom plate, a rotating shaft fixedly connected to the top center of the grinding disc, a cross beam arranged above the rotating shaft, a motor fixedly connected to the cross beam, the output end of the motor connected to the rotating shaft, an electric push rod fixedly connected to the bottom of both ends of the cross beam, the bottom of the electric push rod fixedly connected to the base, and a sufficient grinding mechanism arranged on the grinding cylinder.

[0008] Preferably, the bottom of the grinding cylinder is fixedly connected with a supporting leg.

[0009] Preferably, the sufficient grinding mechanism comprises a mounting ring, a spring, an extension rod, a fixed plate, an arc-shaped push plate, a vertical rod, a first permanent magnet, a second permanent magnet, an L-shaped rod, a movable gear ring and a fixed gear ring, the mounting ring is arranged on the outer side of the grinding base plate, the inner side of the mounting ring is attached with a plurality of arc-shaped push plates arranged in a ring shape around the grinding base plate, and the plurality of arc-shaped push plates form a circle, the outer side of the arc-shaped push plate is fixedly connected with the extension rod, a through hole matched with the extension rod is formed in the mounting ring, the outer end of the extension rod penetrates through the through hole and extends to the outside of the grinding cylinder, the outer end of the extension rod is fixedly connected with the fixed plate, one end of the spring is fixedly connected with the mounting ring, and the other end of the spring is fixedly connected with the fixed plate, the top end of the fixed plate is fixedly connected with the vertical rod, the top of the vertical rod is fixedly connected with the first permanent magnet, the rotating shaft is movably connected with the movable gear ring, one end of the L-shaped rod is fixedly connected with the movable gear ring, and the other end of the L-shaped rod is fixedly connected with the second permanent magnet, the inner side of the vertical part of the L-shaped rod is attached with the outer wall of the grinding cylinder, the first permanent magnet and the second permanent magnet are mutually attracted magnets, the fixed gear ring is arranged below the movable gear ring, the fixed gear ring is fixedly connected with the rotating shaft, the gear teeth of the fixed gear ring are arranged at the top, the gear teeth of the movable gear ring are arranged at the bottom, and the gear teeth of the fixed gear ring and the gear teeth of the movable gear ring are matched with each other, when the electric push rod is elongated, the cross beam is lifted, the cross beam drives the rotating shaft and the grinding disc at the bottom end of the rotating shaft to rise, the rotating shaft drives the fixed gear ring to rise, until the top gear teeth of the fixed gear ring and the bottom gear teeth of the movable gear ring are engaged with each other, the motor is changed to slow rotation, so that the rotating shaft drives the fixed gear ring to rotate when the rotating shaft rotates, the fixed gear ring drives the movable gear ring to rotate, the movable gear ring drives the second permanent magnet to make a circular motion through the L-shaped rod, the electric push rod continues to elongate until the horizontal height of the second permanent magnet is the same as that of the first permanent magnet, with the circular motion of the second permanent magnet, when the second permanent magnet passes through the first permanent magnet, due to the principle of opposite poles attracting each other, the first permanent magnet moves inward, the first permanent magnet drives the extension rod to move inward, the extension rod drives the arc-shaped push plate to move inward, when the second permanent magnet makes a circular motion, all the arc-shaped push plates move inward once, so that the paint between the grinding disc and the arc-shaped push plate is pushed into the center of the grinding base plate, and then the electric push rod is retracted to reset, driving the grinding disc to descend for repeated grinding.

[0010] Preferably, the spring is sleeved on the outside of the extension rod, and the length of the extension rod is greater than the thickness of the mounting ring.

[0011] Preferably, the number of the arc-shaped push plates is twelve, and the inner side of the arc-shaped push plate is fixedly connected with a smooth layer.

[0012] Preferably, the application further comprises a limiting mechanism for quickly positioning the rising height of the second permanent magnet, the limiting mechanism comprising a U-shaped limiting frame, mounting rods, a socket, a plug rod, a sliding sleeve and a plug plate, both ends of the limiting frame are rotationally connected with mounting rods, the bottom end of the mounting rod is fixedly connected with the base, the top end of the mounting rod is provided with a socket, the vertical part of the limiting frame is slidingly connected with a sliding sleeve, one side of the sliding sleeve is fixedly connected with a plug plate, the bottom of the plug plate is fixedly connected with a plug rod matched with the socket, when the limiting frame is in a vertical state, the plug rod and the socket correspond to each other, and when the top of the cross beam and the horizontal part of the limiting frame interfere with each other, the horizontal height of the first permanent magnet and the horizontal height of the second permanent magnet are the same.

[0013] Preferably, the horizontal part of the limiting frame is fixedly connected with a rubber sleeve outside.

[0014] A low-volatility green paint grinding process, comprising the following steps:

[0015] The low-volatility green paint to be ground is input into the grinding cylinder and conveyed between the grinding disc and the grinding bottom plate, the electric push rod is started to retract to drive the grinding disc to descend for grinding, after preliminary grinding, the electric push rod is started to drive the grinding disc to rise, the preliminary ground paint is pushed into the grinding disc and the grinding bottom plate again through the full grinding mechanism, the electric push rod is started to retract to drive the grinding disc to descend for secondary grinding, the above steps are repeated for several times until the grinding is fully completed.

[0016] (Three) beneficial effects

[0017] The application provides a low-volatility green paint grinding equipment and a grinding process.

[0018] 1. The low-volatility green paint grinding equipment and grinding process, after the preliminary grinding is completed, the electric push rod is extended, the electric push rod is extended, the cross beam is driven to rise, the cross beam drives the rotating shaft and the grinding disc at the bottom of the rotating shaft to rise, the rotating shaft drives the fixed gear ring to rise, until the top gear of the fixed gear ring and the bottom gear of the movable gear ring are engaged with each other, the motor is slowly rotated, so that the rotating shaft rotates and drives the fixed gear ring to rotate, the fixed gear ring drives the movable gear ring to rotate, the movable gear ring drives the second permanent magnet to make a circular motion through the L-shaped rod, the electric push rod continues to extend, until the horizontal height of the second permanent magnet is the same as that of the first permanent magnet, with the circular motion of the second permanent magnet, when the second permanent magnet passes through the first permanent magnet, due to the principle of opposite poles attracting each other, the first permanent magnet moves inward, the first permanent magnet drives the telescopic rod to move inward, the telescopic rod drives the arc-shaped push plate to push inward, when the second permanent magnet makes a circular motion, all the arc-shaped push plates push inward once, so that the paint between the grinding disc and the arc-shaped push plate is pushed back to the center of the grinding bottom plate, then the electric push rod is retracted and reset, the grinding disc is lowered for repeated grinding, after repeated several times, the entire paint is finely ground, through the setting of the L-shaped rod, the fixed gear ring and the movable gear ring, when the grinding disc is lowered for grinding, the horizontal part of the L-shaped rod is placed on the top of the grinding cylinder, and the fixed gear ring and the movable gear ring are in a separated state, so that the L-shaped rod does not rotate, so that the motor is not burdened when the grinding disc works, through the setting of the first permanent magnet and the second permanent magnet, the rotation of the rotating shaft can drive the arc-shaped push plates to push in sequence when the first permanent magnet and the second permanent magnet are at the same height, so that other external power sources are not needed for driving, and the use effect is good.

[0019] 2. The low-volatility green paint grinding equipment and grinding process, through the setting of the limiting mechanism, the limiting frame is turned to a vertical state during work, the sliding sleeve slides down under the action of gravity, the plug rod at the bottom of the plug plate on one side of the sliding sleeve is inserted into the plug hole, so that the installation of the limiting frame is quickly completed, when the electric push rod is extended, the cross beam is limited by the horizontal part of the limiting frame, and when the top of the cross beam abuts against the horizontal part of the limiting frame, the horizontal height of the first permanent magnet and the horizontal height of the second permanent magnet are the same, so that the height can be quickly positioned, and the use is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Structure diagram of the present application Figure 1 ;

[0021] Figure 2 Structure diagram of the present application Figure 2 ;

[0022] Figure 3 Structure diagram of the full grinding mechanism of the present application

[0023] Figure 4 This is a schematic diagram of the limiting mechanism structure of the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the limiting mechanism structure of the present invention. Figure 6 ;

[0025] Figure 2 For the present invention Figure 7 Enlarged view of the structure at point A in the middle;

[0026] Figure 2 For the present invention Figure 8 Enlarged view of the structure at point B in the middle;

[0027] Figure 4 For the present invention Figures 1-8 Enlarged view of the structure at point C.

[0028] In the diagram: 1. Base, 2. Grinding cylinder, 3. Support foot, 4. Electric push rod, 5. Crossbeam, 6. Motor, 7. Rotating shaft, 8. Limiting mechanism, 9. Grinding disc, 10. Grinding base plate, 11. Mounting ring, 12. L-shaped rod, 13. Arc-shaped push plate, 14. Telescopic rod, 15. Spring, 16. Vertical rod, 17. Fixing plate, 18. First permanent magnet, 19. Second permanent magnet, 20. Fixing toothed ring, 21. Mounting rod, 22. Limiting frame, 23. Sliding sleeve, 24. Insert plate, 25. Insert rod, 26. Insertion hole, 27. Movable toothed ring. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] This invention provides a low-volatile green coating grinding device, such as... ​ As shown, the device includes a base 1 and a grinding cylinder 2 disposed above the base 1. A grinding base plate 10 is fixedly connected to the bottom of the grinding cylinder 2. A grinding disc 9 matching the grinding base plate 10 is disposed above the center of the grinding base plate 10. A rotating shaft 7 is fixedly connected to the top center of the grinding disc 9. A crossbeam 5 is disposed above the rotating shaft 7. A motor 6 is fixedly connected to the crossbeam 5. The output end of the motor 6 is connected to the rotating shaft 7. Electric push rods 4 are fixedly connected to the bottom of both ends of the crossbeam 5. The bottom of the electric push rods 4 is fixedly connected to the base 1. A full grinding mechanism is disposed on the grinding cylinder 2.

[0031] The bottom of the grinding cylinder 2 is fixedly connected to a support foot 3.

[0032] The full grinding mechanism comprises a mounting ring 11, a spring 15, an extension rod 14, a fixed plate 17, an arc-shaped push plate 13, a vertical rod 16, a first permanent magnet 18, a second permanent magnet 19, an L-shaped rod 12, a movable gear ring 27, and a fixed gear ring 20. The mounting ring 11 is arranged outside the grinding base plate 10. The inner side of the mounting ring 11 is attached with a plurality of arc-shaped push plates 13 arranged in a ring shape with the grinding base plate 10 as the center, and the plurality of arc-shaped push plates 13 form a circle. The outer side of the arc-shaped push plate 13 is fixedly connected with the extension rod 14. A through hole matched with the extension rod 14 is formed in the mounting ring 11. The outer end of the extension rod 14 penetrates through the through hole and extends to the outside of the grinding cylinder 2. The outer end of the extension rod 14 is fixedly connected with the fixed plate 17. One end of the spring 15 is fixedly connected with the mounting ring 11, and the other end of the spring 15 is fixedly connected with the fixed plate 17. The top end of the fixed plate 17 is fixedly connected with the vertical rod 16. The top of the vertical rod 16 is fixedly connected with the first permanent magnet 18. The movable gear ring 27 is movably connected with the rotating shaft 7. One end of the L-shaped rod 12 is fixedly connected with the movable gear ring 27, and the other end of the L-shaped rod 12 is fixedly connected with the second permanent magnet 19. The inner side of the vertical part of the L-shaped rod 12 is attached with the outer wall of the grinding cylinder 2. The first permanent magnet 18 and the second permanent magnet 19 are mutually attracted magnets. The fixed gear ring 20 is arranged below the movable gear ring 27. The fixed gear ring 20 is fixedly connected with the rotating shaft 7. The gear teeth of the fixed gear ring 20 are arranged at the top, and the gear teeth of the movable gear ring 27 are arranged at the bottom. The gear teeth of the fixed gear ring 20 and the gear teeth of the movable gear ring 27 are matched with each other. When the electric push rod 4 is extended, the cross beam 5 is lifted, the rotating shaft 7 and the grinding disc 9 at the bottom end thereof are lifted, the fixed gear ring 20 is lifted, until the top gear teeth of the fixed gear ring 20 and the bottom gear teeth of the movable gear ring 27 are engaged with each other. The motor 6 is changed to rotate slowly, so that the rotating shaft 7 drives the fixed gear ring 20 to rotate when the rotating shaft 7 rotates, the fixed gear ring 20 drives the movable gear ring 27 to rotate, the movable gear ring 27 drives the second permanent magnet 19 to make a circular motion through the L-shaped rod 12. The electric push rod 4 continues to be extended, until the horizontal height of the second permanent magnet 19 is the same as that of the first permanent magnet 18. With the circular motion of the second permanent magnet 19, when the second permanent magnet 19 passes through the first permanent magnet 18, the first permanent magnet 18 moves inward due to the principle of opposite poles attracting each other. The first permanent magnet 18 drives the extension rod 14 to move inward, the extension rod 14 drives the arc-shaped push plate 13 to move inward. When the second permanent magnet 19 makes a circular motion for one round, all the arc-shaped push plates 13 move inward once, so that the paint between the grinding disc 9 and the arc-shaped push plate 13 is pushed into the center of the grinding base plate 10. Then the electric push rod 4 is retracted to reset, the grinding disc 9 is lowered to repeat the grinding.

[0033] After the initial grinding is completed, the electric push rod 4 is extended, and when the electric push rod 4 is extended, the cross beam 5 is lifted, the cross beam 5 drives the rotating shaft 7 and the grinding disc 9 at the bottom end of the rotating shaft 7 to rise, the rotating shaft 7 drives the fixed gear ring 20 to rise, until the top gear of the fixed gear ring 20 and the bottom gear of the movable gear ring 27 are engaged with each other, the motor 6 is slowly rotated, so that the rotating shaft 7 drives the fixed gear ring 20 to rotate when the rotating shaft 7 rotates, the fixed gear ring 20 drives the movable gear ring 27 to rotate, the movable gear ring 27 drives the second permanent magnet 19 to move in a circle through the L-shaped rod 12, the electric push rod 4 continues to extend, until the horizontal height of the second permanent magnet 19 is the same as the horizontal height of the first permanent magnet 18, with the circular motion of the second permanent magnet 19, when the second permanent magnet 19 passes through the first permanent magnet 18, due to the principle of opposite poles attracting each other, the first permanent magnet 18 moves inward, the first permanent magnet 18 drives the telescopic rod 14 to move inward, the telescopic rod 14 drives the arc-shaped push plate 13 to push inward, when the second permanent magnet 19 moves in a circle, all the arc-shaped push plates 13 push inward once, so that the paint between the grinding disc 9 and the arc-shaped push plate 13 is pushed back to the center of the grinding bottom plate 10, then the electric push rod 4 is retracted and reset, drives the grinding disc 9 to descend and repeat grinding, after repeating several times, the entire paint is finely ground, through the setting of the L-shaped rod 12, the fixed gear ring 20 and the movable gear ring 27, when the grinding disc 9 is lowered and grinds, the horizontal part of the L-shaped rod 12 is on the top of the grinding cylinder 2, and the fixed gear ring 20 and the movable gear ring 27 are separated from each other, so that the L-shaped rod 12 does not rotate, so that the motor 6 is not burdened when the grinding disc 9 works, through the setting of the first permanent magnet 18 and the second permanent magnet 19, the rotation of the rotating shaft 7 drives the entire arc-shaped push plate 13 to move in sequence when the first permanent magnet 18 and the second permanent magnet 19 are at the same height, so that other external power sources are not needed to drive, and the use effect is good.

[0034] The spring 15 is sleeved outside the telescopic rod 14, and the length of the telescopic rod 14 is greater than the thickness of the mounting ring 11.

[0035] The number of arc-shaped push plates 13 is twelve, and the inner side of the arc-shaped push plate 13 is fixedly connected with a smooth layer.

[0036] The limiting mechanism 8 for quickly positioning the rising height of the second permanent magnet 19 comprises a U-shaped limiting frame 22, mounting rods 21, a socket 26, a plug rod 25, a sliding sleeve 23 and a plug plate 24, both ends of the limiting frame 22 are rotationally connected with the mounting rods 21, the bottom end of the mounting rod 21 is fixedly connected with the base 1, the top end of the mounting rod 21 is provided with the socket 26, the vertical part of the limiting frame 22 is slidingly connected with the sliding sleeve 23, one side of the sliding sleeve 23 is fixedly connected with the plug plate 24, the bottom of the plug plate 24 is fixedly connected with the plug rod 25 matched with the socket 26, when the limiting frame 22 is in the vertical state, the plug rod 25 and the socket 26 correspond to each other, and when the top of the cross beam 5 and the horizontal part of the limiting frame 22 interfere with each other, the horizontal height of the first permanent magnet 18 and the horizontal height of the second permanent magnet 19 are the same.

[0037] Through the setting of the limiting mechanism 8, in the working process, the limiting frame 22 is turned to the vertical state, the sliding sleeve 23 slides downward under the action of gravity, the plug rod 25 at the bottom of the plug plate 24 on one side of the sliding sleeve 23 is inserted into the socket 26, so that the installation of the limiting frame 22 is quickly completed, when the electric push rod 4 is elongated, the cross beam 5 is limited by the horizontal part of the limiting frame 22, and when the top of the cross beam 5 and the horizontal part of the limiting frame 22 interfere with each other, the horizontal height of the first permanent magnet 18 and the horizontal height of the second permanent magnet 19 are the same, so that the height can be quickly positioned, and the use is convenient.

[0038] The horizontal part of the limiting frame 22 is fixedly connected with a rubber sleeve.

[0039] A low-volatility green paint grinding process comprises the following steps:

[0040] The low-volatility green paint to be ground is input into the grinding cylinder 2 and conveyed between the grinding disc 9 and the grinding bottom plate 10, the electric push rod 4 is started to contract to drive the grinding disc 9 to descend for grinding, after preliminary grinding, the electric push rod 4 is started to drive the grinding disc 9 to rise, the preliminary ground paint is pushed into the grinding disc 9 and the grinding bottom plate 10 again by the full grinding mechanism, the electric push rod 4 is started to contract to drive the grinding disc 9 to descend for secondary grinding, and the above steps are repeated for several times until the grinding is completed.

[0041] Working principle: after the initial grinding is completed, the electric push rod 4 is extended, when the electric push rod 4 is extended, the cross beam 5 is lifted, the cross beam 5 drives the rotating shaft 7 and the grinding disc 9 at the bottom end of the rotating shaft 7 to rise, the rotating shaft 7 drives the fixed gear ring 20 to rise, until the top gear of the fixed gear ring 20 and the bottom gear of the movable gear ring 27 are engaged with each other, the motor 6 is slowly rotated, so that the rotating shaft 7 drives the fixed gear ring 20 to rotate when the rotating shaft 7 rotates, the fixed gear ring 20 drives the movable gear ring 27 to rotate, the movable gear ring 27 drives the second permanent magnet 19 to make a circular motion through the L-shaped rod 12, the electric push rod 4 continues to extend, until the horizontal height of the second permanent magnet 19 is the same as that of the first permanent magnet 18, with the circular motion of the second permanent magnet 19, when the second permanent magnet 19 passes through the first permanent magnet 18, due to the principle of opposite poles attracting each other, the first permanent magnet 18 moves inward, the first permanent magnet 18 drives the telescopic rod 14 to move inward, the telescopic rod 14 drives the arc-shaped push plate 13 to push inward, when the second permanent magnet 19 makes a circular motion, all the arc-shaped push plates 13 push inward once, so that the paint between the grinding disc 9 and the arc-shaped push plate 13 is pushed back to the center of the grinding bottom plate 10, then the electric push rod 4 is retracted and reset, driving the grinding disc 9 to descend for repeated grinding, after repeating several times, the entire paint is finely ground, through the setting of the L-shaped rod 12, the fixed gear ring 20 and the movable gear ring 27, when the grinding disc 9 is lowered for grinding, the horizontal part of the L-shaped rod 12 is placed on the top of the grinding cylinder 2, and the fixed gear ring 20 and the movable gear ring 27 are separated from each other, so that the L-shaped rod 12 does not rotate, thus the motor 6 is not burdened when the grinding disc 9 works, through the setting of the first permanent magnet 18 and the second permanent magnet 19, the rotation of the rotating shaft 7 drives the entire arc-shaped push plate 13 to be pushed in sequence when the first permanent magnet 18 and the second permanent magnet 19 are at the same height, so that other external power sources are not needed for driving, and the use effect is good.

[0042] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A low volatile green paint grinding device, comprising a base (1), a grinding cylinder (2) arranged above the base (1), characterized in that: The bottom of the grinding cylinder (2) is fixedly connected with a grinding bottom plate (10), the center of the grinding bottom plate (10) is provided with a grinding disc (9) matched with the grinding bottom plate (10), the top center of the grinding disc (9) is fixedly connected with a rotating shaft (7), the upper side of the rotating shaft (7) is provided with a cross beam (5), the cross beam (5) is fixedly connected with a motor (6), the output end of the motor (6) is connected with the rotating shaft (7), the bottom of the two ends of the cross beam (5) is fixedly connected with an electric push rod (4), the bottom of the electric push rod (4) is fixedly connected with the base (1), and the grinding cylinder (2) is provided with a sufficient grinding mechanism. The full grinding mechanism comprises a mounting ring (11), a spring (15), an extension rod (14), a fixed plate (17), an arc-shaped push plate (13), a vertical rod (16), a first permanent magnet (18), a second permanent magnet (19), an L-shaped rod (12), a movable gear ring (27) and a fixed gear ring (20), the mounting ring (11) is arranged on the outer side of the grinding base plate (10), the inner side of the mounting ring (11) is attached with a plurality of arc-shaped push plates (13) arranged in a ring shape with the grinding base plate (10) as the center, and the plurality of arc-shaped push plates (13) form a circle, the outer side of the arc-shaped push plate (13) is fixedly connected with the extension rod (14), a through hole matched with the extension rod (14) is formed in the mounting ring (11), the outer end of the extension rod (14) penetrates through the through hole and extends to the outside of the grinding cylinder (2), the outer end of the extension rod (14) is fixedly connected with the fixed plate (17), one end of the spring (15) is fixedly connected with the mounting ring (11), and the other end of the spring (15) is fixedly connected with the fixed plate (17), the top end of the fixed plate (17) is fixedly connected with the vertical rod (16), the top of the vertical rod (16) is fixedly connected with the first permanent magnet (18), the rotating shaft (7) is movably connected with the movable gear ring (27), one end of the L-shaped rod (12) is fixedly connected with the movable gear ring (27), and the other end of the L-shaped rod (12) is fixedly connected with the second permanent magnet (19), the inner side of the vertical part of the L-shaped rod (12) is attached with the outer wall of the grinding cylinder (2), the first permanent magnet (18) and the second permanent magnet (19) are mutually attracted magnets, the movable gear ring (27) is arranged below the fixed gear ring (20), the fixed gear ring (20) is fixedly connected with the rotating shaft (7), the gear teeth of the fixed gear ring (20) are arranged at the top, the gear teeth of the movable gear ring (27) are arranged at the bottom, and the gear teeth of the fixed gear ring (20) and the gear teeth of the movable gear ring (27) are matched with each other, when the electric push rod (4) is elongated, the cross beam (5) is lifted, the cross beam (5) drives the rotating shaft (7) and the grinding disc (9) at the bottom end of the rotating shaft (7) to be lifted, the rotating shaft (7) drives the fixed gear ring (20) to be lifted, until the top gear teeth of the fixed gear ring (20) and the bottom gear teeth of the movable gear ring (27) are engaged with each other, the motor (6) is changed to rotate slowly, so that the rotating shaft (7) drives the fixed gear ring (20) to rotate when the rotating shaft (7) rotates, the fixed gear ring (20) drives the movable gear ring (27) to rotate, the movable gear ring (27) drives the second permanent magnet (19) to make a circular motion through the L-shaped rod (12), the electric push rod (4) continues to be elongated, until the horizontal height of the second permanent magnet (19) is the same as that of the first permanent magnet (18), with the circular motion of the second permanent magnet (19), when the second permanent magnet (19) passes through the first permanent magnet (18), due to the principle of opposite poles attracting each other, the first permanent magnet (18) moves inward, the first permanent magnet (18) drives the extension rod (14) to move inward, the extension rod (14) drives the arc-shaped push plate (13) to move inward,When the second permanent magnet (19) circumferential motion a week, all the arc-shaped push plate (13) to the inside push once, so that the paint between the grinding disc (9) and the arc-shaped push plate (13) is pushed into the center of the grinding bottom plate (10), and then the electric push rod (4) is retracted and reset, driving the grinding disc (9) to drop for repeated grinding.

2. A low volatile green paint grinding apparatus according to claim 1, characterized in that: The bottom of the grinding cylinder (2) is fixedly connected with a support leg (3).

3. A low volatile green paint grinding apparatus as claimed in claim 2, wherein: The spring (15) is sleeved outside the telescopic rod (14), and the length of the telescopic rod (14) is greater than the thickness of the mounting ring (11).

4. A low volatile green paint grinding apparatus as claimed in claim 3, wherein: The number of the arc-shaped push plates (13) is twelve, and the inner side of the arc-shaped push plate (13) is fixedly connected with a smooth layer.

5. A low volatile green paint grinding apparatus as claimed in claim 4, wherein: Further comprising a limiting mechanism (8) for quickly positioning the rising height of the second permanent magnet (19), the limiting mechanism (8) comprises a U-shaped limiting frame (22), a mounting rod (21), a bushing (26), a plug rod (25), a sliding sleeve (23) and a plug plate (24), the two ends of the limiting frame (22) are rotatably connected with the mounting rod (21), the bottom end of the mounting rod (21) is fixedly connected with the base (1), the top end of the mounting rod (21) is provided with the bushing (26), the vertical part of the limiting frame (22) is slidably connected with the sliding sleeve (23), one side of the sliding sleeve (23) is fixedly connected with the plug plate (24), the bottom of the plug plate (24) is fixedly connected with the plug rod (25) matched with the bushing (26), when the limiting frame (22) is in a vertical state, the plug rod (25) and the bushing (26) correspond to each other, and when the top of the cross beam (5) and the horizontal part of the limiting frame (22) abut against each other, the horizontal height of the first permanent magnet (18) and the horizontal height of the second permanent magnet (19) are the same.

6. A low volatile green paint grinding apparatus according to claim 5, wherein: The lateral part of the limiting frame (22) is fixedly connected with a rubber sleeve outside.

7. A low volatile green paint grinding process based on any of the low volatile green paint grinding apparatuses of claims 1-6, characterized by, The following steps are included: The low-volatility green paint to be ground is input into the grinding cylinder (2) and conveyed between the grinding disc (9) and the grinding bottom plate (10), the electric push rod (4) is started to retract to drive the grinding disc (9) to descend for grinding, after preliminary grinding, the electric push rod (4) is started to drive the grinding disc (9) to rise, the preliminary ground paint is pushed into the grinding disc (9) and the grinding bottom plate (10) again through the sufficient grinding mechanism, the electric push rod (4) is started to retract to drive the grinding disc (9) to descend for secondary grinding, and the above steps are repeated for several times until the grinding is completed.

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