Airflow mill for preparing titanium dioxide matting agent

Abstract

The present invention discloses an air flow pulverizer for preparing titanium dioxide matting agent, comprising: a frame, a lower cover arranged on the frame, a seat ring arranged on the lower cover, an upper cover arranged on the seat ring, a discharge pipe arranged on the upper cover, an adjusting pipe inserted in the discharge pipe and movable up and down, a feeding device arranged on the seat ring, and a gas distribution device arranged on the frame; the lower end of the discharge pipe has a hole pipe section extending into the crushing chamber, and the outer circumference of the hole pipe section is radially penetrated with a plurality of discharge holes, and the lower part of the adjusting pipe can extend into the hole pipe section. The air flow pulverizer of the present invention can improve the crushing efficiency by arranging an upper crushing ring and a lower crushing ring in the crushing chamber so that the logistics can move at a high speed and collide with the upper crushing ring and the lower crushing ring; the present invention can adjust the discharge fineness by adjusting the discharge height through the design of the adjusting pipe and the discharge pipe structure, and can also ensure the discharge efficiency at the same time.

Description

Technical Field

[0001] The invention relates to the field of pulverizing equipment, in particular to a jet mill for preparing titanium dioxide matting agent. Background Art

[0002] Air flow milling is one of the most commonly used ultrafine grinding methods. It is widely used in ultrafine grinding or fine grinding of materials in non-metallic minerals, pharmaceuticals, chemicals, metallurgy and other industries. It has the characteristics of fine product particle size, narrow particle size distribution, smooth particle surface, regular particles, high purity and high activity.

[0003] Among them, the flat airflow pulverizer, also known as the disc airflow pulverizer, is one of the earliest and most widely used airflow pulverizers in industry. Its principle is: the material is accelerated by the nozzle of the jet feeder through the feeding port and introduced into the grinding chamber, where it is crushed by mutual collision, friction, shearing and other factors driven by the rotating airflow; the fine powder is pushed to the central outlet pipe of the grinding chamber by the airflow, and is discharged in a spiral motion in the cyclone separator; the exhaust gas is discharged from the exhaust gas discharge pipe; the coarse particles are thrown to the peripheral wall of the grinding chamber for cyclic crushing under the centrifugal action.

[0004] However, the disc-type airflow mill also has some defects: for example, since it mainly relies on the mutual collision of materials for crushing, its crushing efficiency is low; in addition, this type of mill is generally not easy to adjust the fineness of the material.

[0005] So now a more reliable solution is needed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an air flow pulverizer in view of the deficiencies in the above-mentioned prior art.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an air flow pulverizer, comprising: a frame, a lower cover arranged on the frame, a seat ring arranged on the lower cover, an upper cover arranged on the seat ring, a discharge pipe arranged on the upper cover, an adjustment pipe inserted in the discharge pipe and movable up and down, a feeding device arranged on the seat ring, and a gas distribution device arranged on the frame;

[0008] The cavity between the lower cover, the seat ring and the upper cover forms a crushing chamber, the material enters the crushing chamber through the feeding device, the compressed air is transported to the crushing chamber by the air distribution device, and the crushed material is discharged from the discharge pipe;

[0009] The lower end of the discharge pipe has a hole pipe section extending into the crushing chamber, and the outer circumference of the hole pipe section is radially penetrated with a plurality of discharge holes, and the lower part of the regulating pipe can extend into the hole pipe section.

[0010] Preferably, an upper lining plate and a lower lining plate are respectively provided on the inner walls of the upper cover and the lower cover;

[0011] An upper crushing ring is arranged on the bottom surface of the upper inner lining plate, and a lower crushing ring is arranged on the upper surface of the lower inner lining plate. Both the upper crushing ring and the lower crushing ring are arranged coaxially with the discharge pipe.

[0012] Preferably, the height of the lower crushing ring is lower than that of the upper crushing ring, and the diameter of the lower crushing ring is larger than that of the upper crushing ring.

[0013] Preferably, the height of the lower crushing ring is 1 / 3-3 / 4 of the height of the upper crushing ring, and the diameter of the upper crushing ring is 1 / 2-5 / 6 of the diameter of the lower crushing ring.

[0014] Preferably, the discharge pipe is fixedly connected to the upper cover via a mounting sleeve, and the regulating pipe is threadedly connected to the inner wall of the discharge pipe.

[0015] Preferably, the diameter of the discharge hole on the hole pipe section gradually decreases from top to bottom.

[0016] Preferably, a flange is fixedly connected to the upper end of the regulating tube, a plurality of first top screws are threadedly connected to the flange, and the lower ends of the first top screws are used to press against the upper end surface of the mounting sleeve;

[0017] A mounting bracket is fixedly connected to the upper end surface of the mounting sleeve, and a plurality of second top screws are threadedly connected to the mounting bracket. The lower ends of the second top screws are used for pressing against the upper end surface of the flange.

[0018] Preferably, the gas distribution device includes a compressed gas buffer ring tube fixedly connected to the frame, an air intake pipe arranged on the compressed gas buffer ring tube, a plurality of crushing nozzles tangentially arranged on the seat ring, and a plurality of air intake hoses connecting the compressed gas buffer ring and the plurality of crushing nozzles.

[0019] Preferably, the feeding device comprises a feeding pipe tangentially connected to the seat ring, a hopper connected to the feeding pipe, and a feeding nozzle connected to a port of the feeding pipe.

[0020] Preferably, it further comprises a circulation pipe, the upper end of the regulating pipe is detachably connected to a discharge pipe, the feed end of the circulation pipe is connected to the side of the discharge pipe, and the discharge end of the circulation pipe is connected to the feed pipe.

[0021] The beneficial effects of the present invention are as follows: the air flow pulverizer of the present invention can improve the crushing efficiency by arranging the upper crushing ring and the lower crushing ring in the crushing chamber so that the logistics can move at high speed and collide with the upper crushing ring and the lower crushing ring; in addition, the setting of the structural dimensions of the upper crushing ring and the lower crushing ring can also facilitate the discharge of materials;

[0022] The present invention can adjust the discharge fineness by adjusting the discharge height through the design of the adjustment tube and the discharge tube structure, while ensuring the discharge efficiency; and after the adjustment tube is rotated, it can remain stable through the first top screw and the second top screw to prevent the upper and lower positions from moving during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the air flow pulverizer in Example 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure inside the crushing chamber in Example 1 of the present invention;

[0025] Figure 3 It is a partial enlarged structural schematic diagram of the hole tube section in Example 1 of the present invention;

[0026] Figure 4 Schematic diagram of the cross-sectional structure of the crushing chamber in Example 1 of the present invention;

[0027] Figure 5 This is a schematic diagram of the installation structure of the regulating tube in Example 2 of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the connection between the circulation pipe and the regulating pipe in Example 3 of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the connection between the circulation pipe and the feed pipe in Example 3 of the present invention.

[0030] Description of reference numerals:

[0031] 1—frame; 2—crushing chamber; 3—discharge pipe; 4—adjusting pipe; 5—feeding device; 6—gas distribution device; 7—installation sleeve; 8—circulation pipe; 20—lower cover; 21—seat ring; 22—upper cover; 23—upper inner lining plate; 24—lower inner lining plate; 25—upper crushing ring; 26—lower crushing ring; 30—hole pipe section; 31—discharge hole; 40—flange; 41—first top screw; 42—discharge pipe; 50—feeding pipe; 51—hopper; 52—feeding nozzle; 60—compressed gas buffer ring pipe; 61—intake pipe; 62—crushing nozzle; 63—intake hose; 70—installation bracket; 71—second top screw. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0033] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0034] Example 1

[0035] like Figure 1-4 As shown, a jet mill of this embodiment includes: a frame 1, a lower cover 20 arranged on the frame 1, a seat ring 21 arranged on the lower cover 20, an upper cover 22 arranged on the seat ring 21, a discharge pipe 3 arranged on the upper cover 22, an adjusting pipe 4 which can be inserted into the discharge pipe 3 and can move up and down, a feeding device 5 arranged on the seat ring 21, and a gas distribution device 6 arranged on the frame 1.

[0036] The gas distribution device 6 includes a compressed gas buffer ring pipe 60 fixed to the frame 1, an air intake pipe 61 arranged on the compressed gas buffer ring pipe 60, a plurality of crushing nozzles 62 tangentially arranged on the seat ring 21, and a plurality of air intake hoses 63 connecting the compressed gas buffer ring and the plurality of crushing nozzles 62. The feeding device 5 includes a feeding pipe 50 tangentially connected to the seat ring 21, a hopper 51 connected to the feeding pipe 50, and a feeding nozzle 52 connected to the port of the feeding pipe 50.

[0037] The cavity between the lower cover 20, the seat ring 21 and the upper cover 22 forms the crushing chamber 2, and the compressed air supplied from the outside can be transported to the air inlet pipe 61 and the feed nozzle 52 through the pipeline; the material to be crushed is added to the hopper 51, and the material is transported to the crushing chamber 2 by the action of the compressed air injected into the feed nozzle 52; the compressed air entering the air inlet pipe 61 is buffered and distributed by the compressed air buffer ring pipe 60, and then enters the crushing chamber 2 through a plurality of feed nozzles 52, and a high-speed vortex is generated in the crushing chamber 2, so that the material is crushed by mutual collision, friction and collision and friction with the inner wall of the crushing chamber 2; the fine powder is pushed to the center of the crushing chamber 2 by the air flow, rises in a spiral shape, and is discharged from the discharge pipe 3; the coarse particles are thrown to the surrounding wall of the crushing chamber 2 for cyclic crushing under the action of centrifugal force.

[0038] In this embodiment, an upper inner lining plate 23 and a lower inner lining plate 24 are respectively arranged on the inner walls of the upper cover 22 and the lower cover 20; an upper crushing ring 25 is arranged on the bottom surface of the upper inner lining plate 23, and a lower crushing ring 26 is arranged on the upper surface of the lower inner lining plate 24, and both the upper crushing ring 25 and the lower crushing ring 26 are arranged coaxially with the discharge pipe 3. The height of the lower crushing ring 26 is lower than that of the upper crushing ring 25, and the diameter of the lower crushing ring 26 is larger than that of the upper crushing ring 25. The upper inner lining plate 23 and the lower inner lining plate 24 can be made of corundum.

[0039] In a further preferred embodiment, the height of the lower crushing ring 26 is 1 / 3-3 / 4 of the height of the upper crushing ring 25 , and the diameter of the upper crushing ring 25 is 1 / 2-5 / 6 of the diameter of the lower crushing ring 26 .

[0040] In the crushing chamber 2, the materials are mainly crushed by mutual collision and friction. When the material content is low, the crushing efficiency is easy to decrease. In this embodiment, by setting the upper crushing ring 25 and the lower crushing ring 26, the logistics hits the upper crushing ring 25 and the lower crushing ring 26 when moving at high speed, thereby improving the crushing efficiency. Since the discharge position (the lower end of the discharge pipe 3) in the crushing chamber 2 is close to the lower inner lining plate 24, the height of the lower crushing ring 26 is low, and the height of the upper crushing ring 25 is high, it is conducive to guiding the materials to the area close to the lower inner lining plate 24, so as to facilitate the discharge of the materials; the diameter of the lower crushing ring 26 is large, and the diameter of the upper crushing ring 25 is small, which can also help the materials to move toward the lower end area of ​​the discharge pipe 3 as a whole when moving to the middle.

[0041] Example 2

[0042] Reference Figure 5 This embodiment is a further preferred embodiment based on the embodiment 1, wherein the lower end of the discharge pipe 3 has a hole pipe section 30 extending into the crushing chamber 2, and the outer circumference of the hole pipe section 30 is radially penetrated with a plurality of discharge holes 31, and the lower part of the adjustment pipe 4 can extend into the hole pipe section 30. The diameter of the discharge holes 31 on the hole pipe section 30 gradually decreases from top to bottom. That is, the diameter of the upper discharge hole 31 is greater than the diameter of the lower discharge hole 31.

[0043] The discharge hole 31 is used to collect the material that moves to the center of the crushing chamber 2 and then discharge it from the discharge pipe 3. On the other hand, the discharge hole 31 also has the function of material classification. The material with a size smaller than the discharge hole 31 can pass through the discharge hole 31 and enter the discharge pipe 3. The adjustment pipe 4 can be used to prevent the material from entering the discharge pipe 3 through the discharge hole 31. The insertion depth of the adjustment pipe 4 in the discharge pipe 3 can adjust the height of the discharge of the discharge pipe 3. Specifically:

[0044] First of all, it should be understood that the height h between the lower end face of the adjusting tube 4 and the lower inner lining plate 24 is the actual discharge height of the crushing chamber 2; in the crushing chamber 2, under the centrifugal effect, the closer to the center, the smaller the material size, the higher the discharge height h, the larger the range of materials that can be collected by the discharge tube 3, and the larger the particle size of the discharged materials; the smaller the discharge height h, the smaller the range of materials that can be collected by the discharge tube 3, and the smaller the particle size of the discharged materials. And the limit position of the downward movement of the adjusting tube 4 is the position flush with the lower end face of the discharge tube 3, and the lower end face of the discharge tube 3 does not contact the lower inner lining plate 24.

[0045] In combination with the present embodiment, when the regulating tube 4 is adjusted downward, the discharge holes 31 (the discharge holes 31 with larger apertures) above the lower end surface of the regulating tube 4 are blocked, the discharge height h is reduced, and the range of materials that can be collected by the discharge tube 3 is reduced, thereby reducing the particle size of the discharged material; on the other hand, since the apertures of the discharge holes 31 above and below the discharge tube 3 are relatively low, the particle size of the material that can pass through the discharge holes 31 is also reduced, and the discharge holes 31 play a grading role, so that a part of the material with smaller particle size can enter from the side of the discharge tube 3, and the efficiency of the discharge can be improved while ensuring the discharge fineness requirements. When the regulating tube 4 is adjusted upward, the discharge height h increases, and the range of materials that can be collected by the discharge tube 3 increases, thereby increasing the particle size of the discharged material; at the same time, a large number of discharge holes 31 with larger apertures are connected to the discharge tube 3, and another part of the material can enter the discharge tube 3 through the discharge holes 31 and finally be discharged.

[0046] That is, in this embodiment, part of the material enters from the lower port of the discharge pipe 3 and is discharged through the regulating pipe 4, and the other part enters the discharge pipe 3 from the discharge hole 31 and is discharged through the regulating pipe 4, thereby ensuring the adjustment requirements of the discharge fineness and improving the discharge efficiency.

[0047] In a preferred embodiment, the discharge pipe 3 is fixed to the upper cover 22 via the mounting sleeve 7, and the adjusting pipe 4 is threadedly connected to the inner wall of the discharge pipe 3. By rotating the adjusting pipe 4, the height at which the adjusting pipe 4 is inserted into the discharge pipe 3 can be changed, thereby adjusting the discharge height h.

[0048] In a further preferred embodiment, a flange 40 is fixedly connected to the upper end of the adjusting tube 4, and a plurality of first top screws 41 are threadedly connected to the flange 40, and the lower ends of the first top screws 41 are used to press against the upper end surface of the mounting sleeve 7; a mounting bracket 70 is fixedly connected to the upper end surface of the mounting sleeve 7, and a plurality of second top screws 71 are threadedly connected to the mounting bracket 70, and the lower ends of the second top screws 71 are used to press against the upper end surface of the flange 40.

[0049] After rotating the adjusting tube 4 to change the height at which the adjusting tube 4 is inserted into the discharge tube 3, the first top screw 41 and the second top screw 71 can ensure that the adjusting tube 4 remains stable, and prevent the adjusting tube 4 from moving up and down during use. The specific principle is: when the adjusting tube 4 needs to be rotated, first loosen the first top screw 41 and the second top screw 71, move upward, and the adjusting tube 4 can rotate freely. After adjustment, first tighten the first top screw 41, and press the upper end surface of the mounting sleeve 7 through the lower end of the first top screw 41, so that the tightening of the adjusting tube 4 is more stable, and the downward movement of the adjusting tube 4 can be stably limited; then tighten the second top screw 71, and press the upper end surface of the flange 40 through the lower end of the second top screw 71, so that the upward movement of the adjusting tube 4 can be stably limited; thus, the first top screw 41 and the second top screw 71 can stably limit the upper and lower positions of the adjusting tube 4, so that the adjusting tube 4 can remain stable.

[0050] Example 3

[0051] Reference Figure 6-7 This embodiment is a further preferred embodiment based on the embodiment 2. In this embodiment, the air flow mill further comprises a circulation pipe 8, the upper end of the regulating pipe 4 is detachably connected with a discharge pipe 42, the feeding end of the circulation pipe 8 is connected to the side of the discharge pipe 42, and the discharging end of the circulation pipe 8 is connected to the feeding pipe 50. A solenoid valve and / or a circulation pump may also be provided on the circulation pipe 8. The circulation pipe 8 is used to return part of the crushed materials to the crushing chamber 2 for secondary crushing. The arrangement of this structure has at least the following advantages: on the one hand, the cyclic crushing of part of the materials can further reduce the particle size of the materials, and at the same time, the particle size of the materials can be controlled within a certain range (the particle size decreases when the circulation amount is increased, and the particle size increases when the circulation amount is reduced); on the other hand, by introducing part of the crushed materials into the crushing chamber 2, the content of the fixed matter in the crushing chamber 2 can be increased, thereby enhancing the mutual collision of the materials in the crushing chamber 2 and improving the crushing effect.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A jet mill, characterized in that: include: A frame, a lower cover arranged on the frame, a seat ring arranged on the lower cover, an upper cover arranged on the seat ring, a discharge pipe arranged on the upper cover, an adjustment pipe inserted in the discharge pipe and movable up and down, a feeding device arranged on the seat ring, and a gas distribution device arranged on the frame; The cavity between the lower cover, the seat ring and the upper cover forms a crushing chamber, the material enters the crushing chamber through the feeding device, the compressed air is transported to the crushing chamber by the air distribution device, and the crushed material is discharged from the discharge pipe; The lower end of the discharge pipe has a hole pipe section extending into the crushing chamber, and the outer circumference of the hole pipe section is radially penetrated with a plurality of discharge holes, and the lower part of the adjustment pipe can extend into the hole pipe section; An upper lining plate and a lower lining plate are respectively arranged on the inner walls of the upper cover and the lower cover; An upper crushing ring is arranged on the bottom surface of the upper inner lining plate, and a lower crushing ring is arranged on the upper surface of the lower inner lining plate, and both the upper crushing ring and the lower crushing ring are arranged coaxially with the discharge pipe; The height of the lower crushing ring is lower than that of the upper crushing ring, and the diameter of the lower crushing ring is larger than the diameter of the upper crushing ring; The height of the lower crushing ring is 1 / 3-3 / 4 of the height of the upper crushing ring, and the diameter of the upper crushing ring is 1 / 2-5 / 6 of the diameter of the lower crushing ring; The discharge pipe is fixedly connected to the upper cover via a mounting sleeve, and the regulating pipe is threadedly connected to the inner wall of the discharge pipe; The diameter of the discharge hole on the hole pipe section gradually decreases from top to bottom.

2. The air flow mill according to claim 1, characterized in that: The upper end of the regulating tube is fixedly connected with a flange, and a plurality of first top screws are threadedly connected to the flange, and the lower ends of the first top screws are used for pressing against the upper end surface of the mounting sleeve; A mounting bracket is fixedly connected to the upper end surface of the mounting sleeve, and a plurality of second top screws are threadedly connected to the mounting bracket. The lower ends of the second top screws are used for pressing against the upper end surface of the flange.

3. The air flow mill according to claim 1, characterized in that: The gas distribution device includes a compressed gas buffer ring tube fixedly connected to the frame, an air intake pipe arranged on the compressed gas buffer ring tube, a plurality of crushing nozzles tangentially arranged on the seat ring, and a plurality of air intake hoses connecting the compressed gas buffer ring and the plurality of crushing nozzles.

4. The air flow pulverizer according to claim 3, characterized in that: The feeding device comprises a feeding pipe connected to the seat ring in a tangential direction, a hopper connected to the feeding pipe, and a feeding nozzle connected to a port of the feeding pipe.

5. The air flow pulverizer according to claim 4, characterized in that: It also includes a circulation pipe, the upper end of the regulating pipe is detachably connected to a discharge pipe, the feed end of the circulation pipe is connected to the side of the discharge pipe, and the discharge end of the circulation pipe is connected to the feed pipe.

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