A sand milling device for industrial paint production

Abstract

This invention discloses a sand milling device for industrial paint production, comprising a sand milling jar, a baffle cylinder fixedly installed inside the sand milling jar, an annular slot formed in the upper part of the baffle cylinder, a filter cylinder inserted into the annular slot, and a material leakage through hole matching the filter holes of the filter cylinder in the upper part of the baffle cylinder. A drive shaft is inserted through the middle of the upper end of the sand milling jar, and crushing rods are evenly arranged on the outer side of the lower end of the drive shaft. A mounting base is provided on the upper part of the sand milling jar, and a motor for driving the drive shaft is provided on the upper end of the mounting base. A lifting mechanism is provided on the upper part of the mounting base, and a push-pull plate is connected to the output end of the lifting mechanism through the mounting base. The push-pull plate is connected to a reciprocating pressing mechanism for intermittently pressing the filter cylinder. This invention can separate smaller material particles, allowing larger material particles to be fully impacted, accelerating the grinding of large particles, while avoiding reversible phenomena during the material particle crushing process caused by excessively high material particle concentration in the grinding chamber.

Description

Technical Field

[0001] This invention relates to the field of paint production equipment technology, specifically to a sand milling device for industrial paint production. Background Technology

[0002] Industrial paint is a material that can be coated on the surface of an object and form a continuous film that adheres firmly. Whether it is a traditional coating product made from natural substances or a modern coating product made from synthetic chemical products, they all belong to organic chemical polymer materials. The coating film formed is a type of polymer compound. According to the modern classification of chemical products, paint belongs to fine chemical products. Modern paint is gradually becoming a type of multifunctional engineering material.

[0003] Patent CN113083448A discloses a paint sand mill, relating to the technical field of paint and coating production equipment. The mill contains a filter assembly that divides the mill's interior into a first chamber and a second chamber. A rotating shaft is rotatably connected to the first chamber, and a dispersing device is fixedly connected to the shaft. One end of the shaft passes through the side wall of the mill and is connected to a driving device. The filter assembly includes at least two filters, each connected to a filter driving device. Each filter driving device can drive each filter to move out of or into the mill. A filter cleaning device corresponding to each filter is fixedly installed on the inner wall of the mill. Each filter cleaning device can clean each filter during its movement. The mill has an inlet and an outlet; the inlet communicates with the first chamber, and the outlet communicates with the second chamber. However, some problems still exist. For example, after the paint material particles are ultra-finely pulverized to a certain extent, a series of qualitative changes occur in the microscopic physicochemical properties of the particles. However, when the concentration of pulverized material particles is too high, a reversible process of pulverization and agglomeration will occur. When the speeds of these two processes are equal, a dynamic equilibrium is reached in the pulverization process, and the particle size reaches the limit value. At this point, it is futile to further extend the pulverization time. Summary of the Invention

[0004] The purpose of this invention is to provide a sand milling device for industrial paint production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sand milling device for industrial paint production, comprising a sand milling jar, wherein a baffle cylinder is fixedly installed inside the sand milling jar, and the baffle cylinder divides the sand milling jar into a grinding chamber and a material collection chamber; an annular slot is provided in the upper part of the baffle cylinder, and a filter cylinder is inserted into the annular slot; a material leakage through hole matching the filter holes of the filter cylinder is provided in the upper part of the baffle cylinder; a drive shaft is installed through the middle of the upper end of the sand milling jar; and crushing elements are evenly arranged on the outer side of the lower end of the drive shaft. The grinding jar has a mounting base at its upper part, a motor for driving the transmission shaft at its upper end, a lifting mechanism at its upper part, a push-pull plate at the output end of the lifting mechanism passing through the mounting base, and a reciprocating pressing mechanism for intermittently pressing the filter cartridge at its lower part. The grinding jar also has a material injection pipe at its lower part for injecting material into the grinding chamber, and a circulating material guide pipe connecting the grinding chamber and the collection chamber at its lower part. A material injection pump is installed on the circulating material guide pipe.

[0006] Preferably, the lifting mechanism includes a first gear, an adjusting screw, a gear sleeve, a support base, a worm gear, a rocker arm, a pawl, a reset spring, a pull rod, a reset spring, a valve core plate, and a liquid guide sleeve. The upper part of the mounting base is uniformly provided with first gears. An adjusting screw is located at the axis of the first gear, and the lower end of the adjusting screw passes through the mounting base and is fixedly connected to the push-pull plate. Gear sleeves rotatably connected to the mounting base are provided on the outer sides of several first gears. Support bases are symmetrically arranged on the upper surface of the mounting base. A worm gear rotatably drives the gear sleeves to rotate between two of the support bases. One end of the worm gear… A rocker arm is fitted through the outer side of the support base. An installation groove is provided at the connection between the rocker arm and the worm gear. A pawl is rotatably mounted in the installation groove. A reset spring is provided in the installation groove to press the pawl against the worm gear. Push slots matching the pawl are evenly provided on the outer side of the worm gear. A pull rod is hinged to the end of the rocker arm away from the worm gear. A reset spring is fitted on the outer side of the pull rod. The lower end of the pull rod passes through the grinding tank and is connected to a frustoconical valve core plate. The valve core plate is suspended at the inlet end of the circulating feed pipe. A liquid guide sleeve matching the valve core plate is provided at the inlet end of the circulating feed pipe.

[0007] Preferably, the reciprocating pressing mechanism includes a second gear, a third gear, a transmission rod, a clamp, a connecting shaft, an ejector spring, and a positioning post. The upper end of the filter cylinder is permeated with clamps evenly arranged through the sand mill. The upper end of the clamp is provided with a connecting shaft. One side of the connecting shaft has an installation hole, and an ejector spring is provided in the installation hole. The outer end of the ejector spring is provided with a positioning post. The upper end of the transmission shaft is fitted with a second gear. The upper end of the sand mill is evenly provided with a third gear that matches the second gear. The lower part of the push-pull plate is evenly rotatably provided with a transmission rod. The lower end of the transmission rod has a connecting insertion hole that matches the connecting shaft, and the transmission rod has a groove for driving the positioning post to move up and down with the rotation of the transmission rod.

[0008] Preferably, the central axis of the material leakage through hole is tangent to the radial line of the drive shaft.

[0009] Preferably, the inner wall of the blocking cylinder is uniformly provided with raised impact bosses.

[0010] Compared with the prior art, the present invention provides a sand milling device for industrial paint production, which has the following beneficial effects: The present invention separates smaller material particles through a screening hole composed of a blocking cylinder and a filter cylinder, so that larger material particles can be fully impacted, accelerating the grinding of large particles. By setting a reciprocating pressing mechanism to change the aperture of the screening hole, the material particles are prevented from getting stuck in the screening hole, making the screening smoother. At the same time, by setting a lifting mechanism to intermittently reduce the height of the push-pull plate, the size of the screening hole is gradually reduced, thereby ensuring that the concentration of material particles in the grinding chamber is not too high during the process of crushing paint material particles, thus avoiding the reversible phenomenon of crushing and agglomeration. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention;

[0012] Figure 2 This is a front sectional view of the present invention;

[0013] Figure 3 This is a top view of the present invention;

[0014] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point A in the middle;

[0015] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure at point B in the middle;

[0016] Figure 6 for Figure 2 Enlarged structural diagram of section C;

[0017] Figure 7for Figure 2 Enlarged structural diagram of section D in the middle;

[0018] Figure 8 This is a schematic cross-sectional view of the rocker arm in this invention.

[0019] In the diagram: 1. Grinding jar; 100. Grinding chamber; 101. Collection chamber; 2. Baffle cylinder; 20. Annular slot; 21. Leakage hole; 3. Filter cylinder; 4. Drive shaft; 5. Crushing rod; 6. Mounting base; 7. Motor; 8. Lifting mechanism; 80. First gear; 81. Adjusting screw; 82. Gear sleeve; 83. Support base; 84. Worm gear; 85. Rocker arm; 86. Pawl; 87. Reset spring; 88. Pull rod; 89. Reset spring; 810. Valve core plate; 811. Liquid guide sleeve; 9. Reciprocating pressing mechanism; 90. Second gear; 91. Third gear; 92. Drive rod; 93. Clamp; 94. Connecting shaft; 95. Ejection spring; 96. Positioning pin; 10. Push-pull plate; 11. Injection pipe; 12. Circulating guide pipe; 13. Injection pump; 14. Impact boss. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only two parts of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-8 This invention provides an embodiment of a sand milling device for industrial paint production: The sand milling device includes a sand milling jar 1, a baffle cylinder 2 fixedly disposed inside the sand milling jar 1, and the baffle cylinder 2 dividing the sand milling jar 1 into a grinding chamber 100 and a material collection chamber 101. An annular slot 20 is formed in the upper part of the baffle cylinder 2, and a filter cylinder 3 is inserted into the annular slot 20. A material leakage through hole 21 matching the filter holes of the filter cylinder 3 is formed in the upper part of the baffle cylinder 2. A drive shaft 4 is inserted through the middle of the upper end of the sand milling jar 1, and crushing rods 5 are evenly arranged on the outer side of the lower end of the drive shaft 4. A mounting base 6 is provided in the upper part of the sand milling jar 1. The upper end of the mounting base 6 is provided with a motor 7 for driving the transmission shaft 4. The lower part of the grinding jar 1 is provided with a feeding pipe 11 for feeding material into the grinding chamber 100. The lower part of the grinding jar 1 is also provided with a circulating guide pipe 12 connecting the grinding chamber 100 and the collection chamber 101. A feeding pump 13 is provided on the circulating guide pipe 12. Smaller material particles are separated through the screening holes formed by the blocking cylinder 2 and the filter cylinder 3, so that larger material particles can be fully impacted, accelerating the grinding of large particles. At the same time, the small particles separated by the feeding pump 13 are drawn into the grinding chamber 100 for further grinding.

[0022] A first gear 80 is evenly arranged on the upper part of the mounting base 6. An adjusting screw 81 is provided at the axis of the first gear 80, and the lower end of the adjusting screw 81 passes through the mounting base 6 and is fixedly connected to the push-pull plate 10. A gear sleeve 82 is provided on the outer side of several first gears 80 and is rotatably connected to the mounting base 6. Support seats 83 are symmetrically arranged on the upper surface of the mounting base 6. A worm gear 84 is rotatably arranged between two support seats 83 to drive the gear sleeve 82 to rotate. One end of the worm gear 84 passes through the outer side of the support seat 83 and is fitted with a rocker arm 85. An installation groove is opened at the connection between the rocker arm 85 and the worm gear 84. A pawl 86 is rotatably arranged in the installation groove. A reset spring 87 is provided in the installation groove to press the pawl 86 against the worm gear 84. Push slots matching the pawl 86 are evenly opened on the outer side of the worm gear 84. A pull rod 88 is hinged to the end of the rocker arm 85 away from the worm gear 84. A reset spring 89 is fitted on the outer side of the pull rod 88. The lower end of the pull rod 88 A frustoconical valve core plate 810 is connected through the milling tank 1, and the valve core plate 810 is suspended at the inlet end of the circulating feed pipe 12. A liquid guide sleeve 811 matching the valve core plate 810 is provided at the inlet end of the circulating feed pipe 12. The pumping force of the feed pump 13 pulls the valve core plate 810 downward, causing the valve core plate 810 to drive the pull rod 88 to move downward, causing the pull rod 88 to pull the rocker arm 85 to rotate downward. At the same time, the reset spring 87 presses the pawl 86 into the push slot, thereby causing the rocker arm 85 to drive the worm gear 84 to rotate. Through the meshing transmission between the worm gear 84 and the gear sleeve 82, the gear sleeve 82 rotates. Through the meshing transmission between the gear sleeve 82 and the first gear 80, the adjustment screw 81 threadedly connected to the first gear 80 moves downward, allowing the push-pull plate 10 to move downward intermittently, thereby continuously reducing the size of the screening hole formed by the blocking cylinder 2 and the filter cylinder 3.

[0023] A clamping head 93 is evenly arranged through the upper end of the filter cylinder 3 and the grinding jar 1. A connecting shaft 94 is provided at the upper end of the clamping head 93. An installation hole is opened on one side of the connecting shaft 94, and an ejector spring 95 is installed in the installation hole. A positioning post 96 is provided at the outer end of the ejector spring 95. A second gear 90 is sleeved on the outer side of the upper end of the transmission shaft 4. A third gear 91 matching the second gear 90 is evenly arranged at the upper end of the grinding jar 1. A transmission rod 92 is evenly rotatably arranged at the lower part of the push-pull plate 10. A connecting post matching the connecting shaft 94 is opened at the lower end of the transmission rod 92. The insertion hole is provided, and the transmission rod 92 has a groove for driving the positioning post 96 to move up and down with the rotation of the transmission rod 92. The transmission shaft 4 drives the second gear 90 to rotate. Through the meshing transmission between the second gear 90 and the third gear 91, the third gear 91 drives the transmission rod 92 to rotate, causing the positioning post 96 on the connecting shaft 94 to rotate in the groove. This causes the connecting shaft 94 to move up and down with the gap, thereby causing the filter cylinder 3 to move up and down, preventing material particles from getting stuck in the screening hole formed by the blocking cylinder 2 and the filter cylinder 3.

[0024] In this implementation, such as Figure 5 As shown, the central axis of the material leakage through hole 21 is tangent to the radial line of the transmission shaft 4, which allows the material particles to pass more smoothly through the screening hole composed of the blocking cylinder 2 and the filter cylinder 3 and be discharged into the collection chamber 101. At the same time, it prevents the material particles entering the collection chamber 101 from flowing back into the grinding chamber 100.

[0025] In this implementation, such as Figure 5 As shown, the inner wall of the blocking cylinder 2 is uniformly provided with raised impact bosses 14, which increases the probability of material particles being impacted and improves the crushing rate of material particles.

[0026] Working Principle: During operation, material is injected into the grinding chamber 100 of the sand mill 1 through the injection pipe 11. The motor 7 drives the transmission shaft 4 to rotate, causing the crushing rod 5 to agitate the material in the grinding chamber 100. Smaller material particles are separated and injected into the collection chamber 101 through the screening holes formed by the blocking cylinder 2 and the filter cylinder 3. At the same time, the crushing rod 5 crushes and grinds larger material particles. The transmission shaft 4 drives the second gear 90 to rotate. Through the meshing transmission between the second gear 90 and the third gear 91, the third gear 91 drives the transmission rod 92 to rotate, causing the positioning pin 96 on the connecting shaft 94 to rotate in the groove. This causes the connecting shaft 94 to move up and down, which in turn allows the filter cylinder 3 to move up and down intermittently, thus changing the size of the screening holes within a small range and preventing material particles from being crushed. The particles are stuck in the screening hole formed by the blocking cylinder 2 and the filter cylinder 3. At the same time, the pumping force of the injection pump 13 pulls the valve core plate 810 downward, causing the valve core plate 810 to drive the pull rod 88 to move downward. In turn, the pull rod 88 pulls the rocker arm 85 to rotate downward. At the same time, the reset spring 87 presses the pawl 86 into the push slot, so that the rocker arm 85 drives the worm 84 to rotate. Then, the meshing transmission between the worm 84 and the gear sleeve 82 causes the gear sleeve 82 to rotate. At the same time, the meshing transmission between the gear sleeve 82 and the first gear 80 causes the adjusting screw 81, which is threaded to the first gear 80, to rotate downward. This allows the push-pull plate 10 to move downward intermittently, thereby continuously reducing the size of the screening hole formed by the blocking cylinder 2 and the filter cylinder 3, and further grinding the material particles.

[0027] It will be apparent to those skilled in the art that the present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A sand milling device for industrial paint production, comprising a sand milling jar (1), characterized in that: A baffle cylinder (2) is fixedly installed inside the grinding jar (1), and the baffle cylinder (2) divides the grinding jar (1) into a grinding chamber (100) and a collection chamber (101). An annular slot (20) is opened in the upper part of the baffle cylinder (2), and a filter cylinder (3) is inserted in the annular slot (20). A material leakage through hole (21) matching the filter hole of the filter cylinder (3) is opened in the upper part of the baffle cylinder (2). A drive shaft (4) is installed through the middle of the upper end of the grinding jar (1). Crushing rods (5) are evenly arranged on the outer side of the lower end of the drive shaft (4). A mounting seat (6) is provided on the upper part of the grinding jar (1). The upper end of the mounting base (6) is provided with a motor (7) for driving the transmission shaft (4). The upper part of the mounting base (6) is provided with a lifting mechanism (8). The output end of the lifting mechanism (8) passes through the mounting base (6) and is connected to a push-pull plate (10). The push-pull plate (10) is connected to a reciprocating pressing mechanism (9) for intermittently pressing the filter cylinder (3). The lower part of the sand mill (1) is provided with a material injection pipe (11) for injecting material into the grinding chamber (100). The lower part of the sand mill (1) is provided with a circulating guide pipe (12) connecting the grinding chamber (100) and the collection chamber (101). The circulating guide pipe (12) is provided with a material injection pump (13).The lifting mechanism (8) includes a first gear (80), an adjusting screw (81), a gear sleeve (82), a support seat (83), a worm gear (84), a rocker arm (85), a pawl (86), a reset spring (87), a pull rod (88), a reset spring (89), a valve core plate (810), and a liquid guide sleeve (811). The upper part of the mounting base (6) is uniformly provided with first gears (80). An adjusting screw (81) is provided at the axis of the first gear (80), and the lower end of the adjusting screw (81) passes through the mounting base (6) and is fixedly connected to the push-pull plate (10). A gear sleeve (82) is provided on the outer side of several first gears (80) and is rotatably connected to the mounting base (6). Support seats (83) are symmetrically provided on the upper surface of the mounting base (6). A worm gear (84) that drives the gear sleeve (82) to rotate is rotatably provided between two of the support seats (83). One end of (84) passes through the outside of the support base (83) and is fitted with a rocker arm (85). The rocker arm (85) and the worm (84) are connected by an installation groove. A pawl (86) is rotatably installed in the installation groove. A reset spring (87) for pressing the pawl (86) against the worm (84) is provided in the installation groove. The worm (84) is uniformly provided with push slots that match the pawl (86) on its outer side. The rocker arm (85) A pull rod (88) is hinged to the end away from the worm gear (84), and a return spring (89) is sleeved on the outside of the pull rod (88). The lower end of the pull rod (88) passes through the grinding tank (1) and is connected to a frustoconical valve core plate (810). The valve core plate (810) is suspended at the inlet end of the circulating feed pipe (12), and a liquid guide sleeve (811) matching the valve core plate (810) is provided at the inlet end of the circulating feed pipe (12).

2. The sand milling device for industrial paint production according to claim 1, characterized in that: The reciprocating pressing mechanism (9) includes a second gear (90), a third gear (91), a transmission rod (92), a clamp (93), a connecting shaft (94), an ejector spring (95), and a positioning post (96). The upper end of the filter cylinder (3) is evenly provided with clamps (93) penetrating the sand mill (1). The upper end of the clamp (93) is provided with a connecting shaft (94). A mounting hole is opened on one side of the connecting shaft (94), and an ejector spring (95) is provided in the mounting hole. The outer end of the ejector spring (95) is provided with a... The positioning column (96) is provided with a second gear (90) on the outer side of the upper end of the transmission shaft (4). The upper end of the sand grinding jar (1) is uniformly provided with a third gear (91) that matches the second gear (90). The lower part of the push-pull plate (10) is uniformly provided with a transmission rod (92). The lower end of the transmission rod (92) is provided with a connecting hole that matches the connecting shaft (94). The transmission rod (92) is provided with a groove for driving the positioning column (96) to move up and down with the transmission rod (92) as it rotates.

3. The sand milling device for industrial paint production according to claim 1, characterized in that: The inner wall of the blocking cylinder (2) is uniformly provided with protruding impact bosses (14).

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