A milling device for a hopper mechanism for crushable powder material

Abstract

The present invention discloses a milling device for a hopper mechanism for crushing agglomerated powder materials, belonging to the technical field of dredging devices for enamel glaze production hoppers. The milling device comprises a cutter head assembly with a top blade facing upward and a vertically arranged power shaft capable of rotating and lifting. The cutter head assembly is installed at the top end of the power shaft and can rotate and lift with the power shaft. The cutter head assembly can radially expand and contract the milling surface. When in use, the cutter head assembly mills and pushes the agglomerated powder materials upward from the bottom of the tube hole of the feed pipe, so that the agglomerated powder materials in the feed pipe to the hopper are milled and crushed and then fall down by themselves. The advantage is that the cutter head assembly can radially expand the milling surface. In the process of milling and pushing the agglomerated powder materials upward from the bottom of the tube hole of the feed pipe, it only needs to adjust the speed of the power shaft to automatically adapt to the change from small to large aperture from the feed pipe to the hopper.

Description

Technical Field

[0001] The invention relates to a milling device for a hopper mechanism of powder material that can be crushed into blocks, and belongs to the technical field of dredging devices for hoppers used in the production of enamel glaze materials. Background Art

[0002] Enamel material is a snowflake-shaped powder formed by mixing multiple raw materials in high proportion and then refining them at high temperature. It is widely used on the surface of products to form a hard and smooth surface protective layer. It not only makes the surface of the product smooth and beautiful, but more importantly, it can isolate the product from the environment and prevent the surface of the product from corrosion.

[0003] In the above-mentioned process of mixing multiple raw materials in proportion, a trough-shaped conveyor belt leading to a mixing pool is generally used. Various hoppers are set along the trough-shaped conveyor belt. The discharge ports of the hoppers are all aligned with the trough of the trough-shaped conveyor belt. When in use, the system controls the discharge of the raw materials into the trough of the trough-shaped conveyor belt according to their respective flow control standards.

[0004] The enamel glaze material factory generally sets the hopper with the hopper mouth at the same level as the second floor of the workshop, so that personnel and machinery can pour raw materials into the hopper on the second floor. The trough conveyor belt is set close to the ground on the first floor. The discharge port of the hopper is located above the trough of the trough conveyor belt and close to the trough mouth. There is a vertical discharge pipe between the discharge port and the hopper.

[0005] The raw materials loaded into the hopper are all in powder form. Among the various powdered raw materials, some (such as sodium nitrate) have the characteristic of crystallizing into lumps when not flowing or agitated for a certain period of time. In the actual production process, it is impossible for these lumpy raw materials loaded into the hopper to be used up just before each shutdown due to process requirements (when the conveyor belt stops feeding the mixing tank). The raw materials remaining in the discharge pipe and hopper will form lumps and lose fluidity after even a short period of downtime. In particular, the raw materials with greater pressure at the bottom will form harder lumps. Workers can only strike the discharge pipe with a hammer to break the lumps of raw materials into pieces and flow down, which is very time-consuming and labor-intensive. After repeated use, some factories simply abandon the hopper and instead rely on manual addition of raw materials according to the amount. This obviously does not meet the requirements of safe and efficient automated production.

[0006] To solve the above problems, the applicant designed a hopper mechanism that can crush the powder into blocks, which involves a key milling device. Since the powder blocks are not only present in the feed pipe, but often also in the hopper, and the diameter of the hopper cavity is larger than the diameter of the feed pipe (5), the general milling tool cannot automatically adapt to the changes in the milling range in a narrow and closed space. Summary of the Invention

[0007] The problem to be solved by the present invention is how to smoothly break up the powder materials in the hoppers and discharge pipes with different inner diameters.

[0008] In view of the above problems, the technical solution proposed by the present invention is:

[0009] A milling device for a hopper mechanism for crushing powder into blocks, comprising a cutter head assembly with a top blade facing upward and a vertically arranged power shaft capable of rotating and lifting. The cutter head assembly is mounted on the top end of the power shaft and can rotate and lift with the power shaft. It can radially expand and contract the milling surface. When in use, the cutter head assembly mills and pushes the block powder from the bottom upward from the lower end of the tube hole of the feed pipe, so that the block powder in the feed pipe to the hopper is milled and crushed and then falls down on its own.

[0010] The milling machine further comprises a power assembly for driving the power shaft to rotate and lift, and the power assembly establishes a driving relationship with the power shaft at the lower end of the power shaft.

[0011] The cutter head assembly includes a blade arm 1 and a blade arm 2, and the blade arm 1 has at least two blade arms, which are installed on the outer peripheral surface of the top end of the power shaft with equal arc length. The blade arm 2 33 is equal to the number of blade arm 1, and is respectively arranged on the lower side of each blade arm and can slide along the respective blade arm 1. The end of blade arm 1 and blade arm 2 close to the power shaft is the inner end, and the end away from the power shaft is the outer end. The inner end of blade arm 1 is connected to the power shaft so that blade arm 1 and the blade arm 2 can rotate with the power shaft. A retraction spring is provided between blade arm 2 and blade arm 1, and a centrifugal hammer is provided on blade arm 2. When the power shaft rotates to a set speed, the centrifugal force F1 generated by the centrifugal hammer can make blade arm 2 overcome the tension of the retraction spring and slide out to the outer end of blade arm 1 to expand the milling surface of the cutter head assembly. The upper side surfaces of blade arm 1 and blade arm 2 are both provided with blade teeth.

[0012] The cutter head assembly also includes a cutter arm three with cutter teeth on the upper side, and the cutter arm three is arranged at the top end of the power shaft.

[0013] A slide rod seat is provided below the inner end of the first knife arm, and two upper and lower slide rods extending toward the outer end in parallel with the first knife arm are provided on the front end surface of the slide rod seat. The second knife arm is provided with two upper and lower slide rod holes parallel to the length direction, and a tension spring hole is provided between the two slide rod holes. The slide rod hole and the tension spring hole both pass through the inner end section and the outer end surface of the second knife arm. The two slide rods are respectively inserted into the two slide rod holes of the second knife arm and can slide in the slide rod holes. The retraction spring is located in the tension spring hole, the inner end of which is fixedly connected to the slide rod seat, and the outer end is fixed to the outer end of the tension spring hole by a fixing pin.

[0014] The inner end of the knife arm 1 is hingedly connected to the power shaft through a hinge shaft, and the outer end of the knife arm 1 can rotate freely up and down around the hinge shaft. When the knife arm 1 is in a horizontal state, the diameter of the circle drawn by the horizontal rotation of the outer end of the knife arm 1 is larger than the hole diameter of the discharge pipe and smaller than the inner diameter of the cylindrical inner cavity of the hopper.

[0015] The knife arm is set horizontally, the inner end of the knife arm is fixedly connected to the power shaft, the knife arm is set horizontally, the inner end of the knife arm is fixedly connected to the power shaft, and the outer end of the knife arm is close to the inner wall of the tube hole of the feeding pipe.

[0016] The power assembly includes a guide block, a rotation drive unit for driving the power shaft to rotate, a lifting drive unit for driving the power shaft to rise and fall, and a buffer compression spring. The power assembly has a guide groove for vertically lifting the milling machine. The lower middle part of the power shaft and the guide block are located in the guide groove. The rotation drive unit is fixed on the guide block. The lower end of the power shaft establishes a rotation drive relationship with the rotation drive unit. The lifting drive unit is located below the guide block. The buffer compression spring is provided between the lifting drive unit and the guide block. The lifting drive unit provides lifting force through the buffer compression spring to lift the power shaft.

[0017] The rotation drive unit includes a motor 1 and a transmission box. One end of the transmission box is located in the guide groove and fixed to the upper surface of the guide block, and is connected to the lower end of the power shaft through tooth engagement inside the box. The other end of the transmission box is connected to the output shaft 1 of the motor 1 through tooth engagement inside the box outside the guide groove.

[0018] The lifting drive unit includes a second motor, a lifting seat and a rack. There are two racks, which are respectively arranged on the front side wall and the rear side wall of the guide groove. The lifting seat is located in the guide groove below the guide block, and its front and rear sides are respectively provided with lifting drive gears that mesh with the racks. The second motor is arranged outside the guide groove and establishes a driving relationship with the lifting drive gear in the lifting seat through the second output shaft. When the lifting drive gear rotates to drive the lifting seat to rise, the lifting seat pushes the guide block to rise. When the lifting drive gear rotates to drive the lifting seat to descend, all milling device components above the guide block follow and descend under the action of gravity.

[0019] Beneficial effect: The cutter head assembly can radially expand the milling surface. In the process of milling and pushing the agglomerated powder from the bottom to the top from the lower end of the tube hole of the feed pipe, it only needs to adjust the rotation speed of the power shaft to automatically adapt to the change from small to large in the diameter from the feed pipe to the hopper aperture, ensuring that the powder agglomerated on the wall can also be milled after the upper milling surface becomes larger, so that the entire hopper mechanism can break up the agglomerated powder without knocking the hopper equipment, so that the hopper can be used normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional schematic diagram of the milling machine described in Example 1 applied to a hopper mechanism;

[0021] Figure 2 It is a plan view of the milling machine described in Example 1;

[0022] Figure 3 This is a schematic diagram of the cutter head assembly in the hole of the feed pipe according to Example 1;

[0023] Figure 4 This is a cross-sectional schematic diagram of the centrifugal hammer according to Example 1 installed on the blade arm 2;

[0024] Figure 5 This is a schematic structural diagram of the blade arm 2 and the sliding rod described in Example 1;

[0025] Figure 6 This is a three-dimensional schematic diagram of the assembly of the blade arm 1, blade arm 2, and centrifugal hammer, etc., described in Example 1;

[0026] Figure 7 This is a schematic diagram of the working condition of the cutter head assembly described in Example 1, showing the cutter head assembly rotating in the feed pipe to mill the agglomerated powder (10), wherein arrow A represents the rotation direction of the power shaft, arrow B represents the upward movement of the power shaft, and F1 represents the centrifugal force generated by the centrifugal hammer, etc.;

[0027] Figure 8 Schematic diagram of the force applied to the blade arm 1 after the cutter head assembly enters the conical inner cavity according to Example 1. Arrow A in the figure represents the rotation direction of the power shaft. Arrow B indicating the upward movement of the power shaft is not shown. Arrow F1 represents the centrifugal force generated by the centrifugal hammer, etc., F4 represents the tension exerted by the hinged shaft on the blade arm 1, F5 represents the resultant force of the centrifugal force F1 and the tension F4, F6 represents the vertical component of F5, and F3 represents the gravity exerted on the centrifugal hammer, etc. In the figure, F6 is greater than F3. The outer end of the blade arm 1 rotates upward from an oblique downward direction, achieving the outward expansion of the first milling surface.

[0028] Figure 9 for Figure 8 Schematic diagram of force analysis, the larger F1 is, the larger F6 is;

[0029] Figure 10 This is a schematic diagram of the cutter head assembly according to Example 1 after entering the conical inner cavity. The figure shows that the centrifugal force F5 generated by the second cutter arm and the centrifugal hammer is greater than the tension F2 of the retraction spring, and the second cutter arm begins to slide outward, achieving the second expansion of the milling surface.

[0030] Figure 11 This is a three-dimensional schematic diagram of the support body described in Example 1;

[0031] Figure 12 This is a cross-sectional schematic diagram of the power assembly of Example 1 assembled at the lower part of the support body;

[0032] Figure 13 Schematic cross-sectional view of the guide post described in Example 1;

[0033] Figure 14 Schematic cross-sectional view of the assembly relationship between the lifting drive unit and the guide groove according to the first embodiment;

[0034] Figure 15 Schematic cross-sectional view of the assembly relationship between the rotation drive unit and the guide groove according to the first embodiment;

[0035] Figure 16 This is a schematic diagram of the cutter head assembly retracting into the barrel hole of the receiving barrel after the hopper completes batching according to Example 1, and the figure shows that the main material control switch is turned off;

[0036] Figure 17 Schematic diagram of the cutter head assembly entering the conical inner cavity under the working condition of Example 2.

[0037] In the figure: 1. Cutter head assembly; 11. Cutter arm 1; 12. Cutter arm 2; 121. Slide rod hole; 122. Tension spring hole; 123. Fixing pin; 13. Cutter arm 3; 14. Centrifugal hammer; 15. Retraction spring; 16. Slide rod seat; 17. Slide rod; 18. Articulated shaft; 19. Cutter teeth; 2. Power shaft; 3. Power assembly; 31. Rotation drive unit; 311. Motor 1; 3111. Output shaft 1; 312. Transmission box; 32. Lifting drive unit; 32 1. Motor 2; 3211. Output shaft 2; 322. Lifting seat; 3221. Lifting drive gear; 323. Rack; 33. Guide block; 34. Buffer spring; 4. Hopper; 41. Cylindrical inner cavity; 42. Conical inner cavity; 5. Feeding pipe; 51. Pipe hole; 6. Material control main switch; 7. Material guide; 71. Feeding barrel; 711. Barrel hole; 8. Support body; 81. Guide column; 811. Guide groove; 9. Grooved conveyor belt; 10. Agglomerated powder. DETAILED DESCRIPTION

[0038] like Figure 1 As shown, the present invention relates to a hopper 4 and a vertically arranged pipe hole 51 connected to the lower port of the hopper 4, which is a cylindrical discharge pipe 5. The hopper 4 has an upper cylindrical inner cavity 41 and a lower conical inner cavity 42, and a trough-type conveyor belt 9 is provided below the discharge pipe 5.

[0039] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0040] Example 1.

[0041] like Figure 1 、 2As shown. A milling machine for a hopper mechanism for crushing agglomerated powder materials comprises a cutter head assembly 1 with a top blade facing upward and a vertically arranged power shaft 2 capable of rotating and lifting. The cutter head assembly 1 is mounted on the top end of the power shaft 2 and can rotate and lift with the power shaft 2. It can radially expand and contract the milling surface. When in use, the cutter head assembly 1 mills and pushes the agglomerated powder materials upward from the bottom through the lower end of the tube hole 51 of the feed pipe 5, so that the agglomerated powder materials in the feed pipe 5 to the hopper 4 are milled and crushed and then fall down on their own. Since the cutter head assembly 1 can radially expand the milling surface, the cutter head assembly 1 can adapt to the change in the aperture from the feed pipe 5 to the hopper 4 from small to large during the upward milling process, ensuring that the powder materials agglomerated on the wall after the upper milling surface becomes larger can also be milled.

[0042] like Figure 2 As shown in FIG. 6 , the cutter head assembly 1 includes a cutter arm 11 and a cutter arm 2 12. There are at least two cutter arms 11, which are installed on the outer peripheral surface of the top end of the power shaft 2 with equal arc length. The number of cutter arms 2 33 is equal to that of cutter arms 11. They are respectively arranged on the lower side of each cutter arm 11 and can slide along their respective cutter arms 11. The ends of cutter arms 11 and cutter arm 2 12 close to the power shaft 2 are inner ends, and the ends away from the power shaft 2 are outer ends. The inner end of cutter arm 11 is connected to the power shaft 2 so that cutter arm 11 and the cutter arm 2 12 can rotate with the power shaft 2. A retraction spring 15 is provided between cutter arm 2 12 and cutter arm 11, and a centrifugal hammer 14 is provided on cutter arm 2 12. When the set speed is reached by rotating with the power shaft 2, the centrifugal force F1 generated by the centrifugal hammer 14 can make cutter arm 2 12 overcome the tension of the retraction spring 15 and slide out to the outer end of cutter arm 11 to expand the milling surface of the cutter head assembly. The upper side surfaces of the blade arm 1 11 and the blade arm 2 12 are both provided with blade teeth 19 . During the application process, when the cutter head assembly 1 is located in the tube hole 51 of the discharge tube 5 with the smallest diameter, the power shaft 2 rotates at a relatively low speed, and the blade arm 11 mills the powder material agglomerated in the tube hole 51 of the discharge tube 5, and the blade arm 2 12 rotates with its respective blade arm 11. Due to the low speed, the tension F2 of the retraction spring 15 overcomes the centrifugal force F1 generated by the centrifugal hammer 14 on the blade arm 2 12, so that the blade arm 2 12 is still located below the blade arm 11 and is still in a retracted state; when the cutter head assembly 1 enters the conical inner cavity 42 with gradually increasing diameter from the tube hole 51 of the discharge tube 5 with the smallest diameter, the power shaft 2 rotates at a relatively high speed, and the centrifugal force F1 generated by the centrifugal hammer 14 on the blade arm 2 12 increases, which can overcome the tension F2 of the retraction spring 15 to make the blade arm 2 12 extend, and mill the agglomerated powder material in the outer ring area outside the blade arm 11. When the milling is completed and the rotation of the knife arm 11 is lowered or stopped, and the centrifugal force F1 generated by the centrifugal hammer 14 on the knife arm 2 12 is reduced or disappears, the knife arm 2 12 is pulled back by the retraction spring 15, completing the retraction of the knife arm 2, and the cutter head assembly can smoothly descend in the tube hole 51 of the discharge tube 5.

[0043] The arrangement of the teeth 19 facilitates the feeding of agglomerated powder during milling. The radial arrangement of the teeth 19 on the multiple blade arms 11 is staggered relative to each other, so that the teeth 19 on the multiple blade arms 11 can complement each other radially, thereby forming a complete milling surface during milling.

[0044] The cutter head assembly 1 also includes a cutter arm 3 13 with cutter teeth 19 on the upper side. The cutter arm 3 13 is arranged at the top of the power shaft 2 to make up for the milling gap formed at the top of the power shaft 2 when the inner end of the cutter arm 1 11 is not convenient to extend to the axis of the power shaft 2.

[0045] The two slide rods 121 are provided with two parallel slide rod holes 121 along the length direction, and a tension spring hole 122 is provided between the two slide rod holes 121. The slide rod holes 121 and the tension spring holes 122 both pass through the inner end section and the outer end face of the knife arm 2 12. The two slide rods 17 are respectively sleeved in the two slide rod holes 121 of the knife arm 2 12 and can slide in the slide rod holes 121. The retraction spring 15 is located in the tension spring hole 122, and its inner end is fixedly connected to the slide rod seat 16, and the outer end is fixed to the outer end of the tension spring hole 122 by a fixing pin 123. In this way, the retraction spring 15 and the slide rod 17 are hidden in the knife arm 2 12 and will not be arranged outside the knife arm 2 12 to occupy additional space.

[0046] Preferably, only two blade arms 11 are provided.

[0047] like Figure 7 As shown in FIG. 10 , in this embodiment, the inner end of the knife arm 11 is hingedly connected to the power shaft 2 via a hinge shaft 18, and the outer end of the knife arm 11 can freely rotate up and down around the hinge shaft 18. When the knife arm 11 is in a horizontal state, the diameter of the circle drawn by the horizontal rotation of the outer end of the knife arm 11 is larger than the aperture of the tube hole 51 of the discharge pipe 5 and smaller than the inner diameter of the cylindrical inner cavity 41 of the hopper 4. In this way, when the cutter head assembly 1 is located in the tube hole 51 of the discharge tube 5 and the tube hole 711 of the receiving tube 71, the outer ends of the cutter arm 11 and the corresponding cutter arm 2 12 are in a downward tilted posture, which can significantly extend the length of the cutter arm 11 and the cutter arm 2 12. When the milling rises to the conical inner cavity 42 and the cylindrical inner cavity 41, the cutter arm 11 and the cutter arm 2 12 can obtain two outward extensions in the horizontal direction. The first time is the outward extension of the cutter arm 11 from the oblique downward posture to the horizontal posture, and the second time is the outward extension of the cutter arm 2 12 horizontally extended.

[0048] It should be noted here that relying on the centrifugal force F1 can only make the knife arm 11 infinitely close to the horizontal posture, but it can never actually reach the true horizontal posture. The centrifugal force F1 is not provided solely by the centrifugal hammer 14 when it rotates with the power shaft 2, but also includes the centrifugal force generated by the outer end of the knife arm 11 itself and all components provided on the knife arm 11 when they rotate with the power shaft 2.

[0049] In this embodiment, when blade arm 11 is milled and ascended in an obliquely downward position within the bore 51 of the feed tube 5, the centrifugal force F1 of the centrifugal hammer 14 causes blade arm 11 to press the blade teeth 19 against the conical milling surface of the agglomerated powder 10. As blade arm 11 is milled and ascended within the conical inner cavity 42 and the cylindrical inner cavity 41, the centrifugal force F1 of the centrifugal hammer 14 and the pulling force F4 of the hinge shaft 18 on blade arm 11 form a resultant force F5 acting on the outer end of blade arm 11. This force F6 then causes blade arm 11 to obtain a vertically upward component F6 of the resultant force F5, which overcomes the gravity F3 acting on the outer end of blade arm 11, causing blade arm 11 and its attached blade arm 2 12 to approach a horizontal position and press the blade teeth 19 against the conical milling surface of the agglomerated powder 10. This milling surface is a nearly flat conical surface.

[0050] Figure 9 This is a simplified diagram of the force analysis of the outer end of the blade arm 11 when it rotates with the power shaft 2. In the figure:

[0051] FI is the centrifugal force of the centrifugal hammer 14 and the outer ends of the blade arm 2 12 and the blade arm 1 11 when they rotate with the power shaft 2;

[0052] F3 is the gravity acting on the centrifugal hammer 14 and the outer ends of the blade arms 2 12 and 11;

[0053] F4 is the pulling force exerted by the centrifugal hammer 14 and the outer ends of the blade arm 2 12 and the blade arm 1 11 on the hinge shaft 18 through the blade arm 1 11;

[0054] F5 is the resultant force formed by FI and F4;

[0055] F6 is the vertical component of F5. Before the knife arm reaches the horizontal position, the larger FI is, the larger F6 is.

[0056] O is the mass point at the outer ends of the centrifugal hammer 14 and the blade arm 2 12 and the blade arm 1 11.

[0057] like Figure 11As shown in FIG. 15 , the milling machine further includes a power assembly 3 for driving the power shaft 2 to rotate and elevate. The power assembly 3 establishes a driving relationship with the power shaft 2 at the lower end of the power shaft 2. The power assembly 3 includes a guide block 33, a rotation drive unit 31 for driving the power shaft 2 to rotate, a lift drive unit 32 for driving the power shaft 2 to elevate, and a buffer compression spring 34. The power assembly 3 has a guide groove 811 for vertically lifting the milling machine. The lower middle portion of the power shaft 2 and the guide block 33 are located in the guide groove 811. The rotation drive unit 31 is fixed to the guide block 33. The lower end of the power shaft 2 establishes a rotational driving relationship with the rotation drive unit 31. The lift drive unit 32 is located below the guide block 33. The buffer compression spring 34 is provided between the lift drive unit 32 and the guide block 33. The lift drive unit 32 provides lifting force through the buffer compression spring 34 to lift the power shaft 2.

[0058] Here, the guide groove 811 is formed on the guide column 81 of the support body 8, and the support body 8 is a device specifically used for mounting a milling machine.

[0059] The setting of the buffer compression spring 34 ensures that the lifting force obtained by the cutter head assembly 1 during the milling rising process is continuous, and can also prevent the cutter head assembly from being forced upward when the lifting seat is started, thereby damaging the cutter head assembly 1, so that the force pushing the cutter head assembly 1 upward is a relatively flexible force.

[0060] The rotation drive unit 31 includes a motor 311 and a transmission box 312. One end of the transmission box 312 is located in the guide groove 811 and is fixed to the upper surface of the guide block 33, and is connected to the lower end of the power shaft 2 through the gear meshing inside the box. The other end of the transmission box 312 is connected to the output shaft 3111 of the motor 311 outside the guide groove 811 through the gear meshing inside the box.

[0061] The lifting drive unit 32 includes a second motor 321, a lifting seat 322 and a rack 323. There are two racks 323, which are respectively arranged on the front side wall and the rear side wall of the guide groove 811. The lifting seat 322 is located in the guide groove 811 below the guide block 33. Its front and rear sides respectively have lifting drive gears 3221 that engage with the rack 323. The second motor 321 is located outside the guide groove 811 and establishes a driving relationship with the lifting drive gear 3221 in the lifting seat 322 through the output shaft 2 3211. When the lifting drive gear 3221 rotates to drive the lifting seat 322 to rise, the lifting seat 322 pushes the guide block 33 to rise. When the lifting drive gear 3221 rotates to drive the lifting seat 322 to descend, all milling machine components above the guide block 33 follow and descend under the action of gravity. This is to prevent the knife arm 2 12 in the cutter head assembly 1 from not fully retracting, and the knife arm 1 11 and the knife arm 2 12 from being stuck in the position above the conical inner cavity 42 and being forcibly pulled downward by the descending lifting seat 322, causing damage.

[0062] The above-mentioned internal gear engagement is a conventional technical means, which means that transmission gears are provided in the transmission box 312 and the lifting seat 322, and internal spline teeth or external spline teeth or gears are provided at the outer ends of the output shaft 1 3111, the output shaft 2 3211 and the lower end of the power shaft 2. The specific setting method is determined according to needs. Since it is a conventional technical means, it is not described or illustrated in detail in this article.

[0063] like Figure 16 As shown, it should be noted that a material guide 7 is provided between the support body 8 and the discharge pipe 5, which has a material receiving barrel 71 connected to the discharge pipe 5. A material control main switch 6 is provided between the discharge pipe 5 and the material receiving barrel 71. The cutter head assembly 1 that has completed milling falls downward into the material receiving barrel 71. After the cutter head assembly 1 falls back into the material receiving barrel 71, the material control main switch 6 remains open, allowing the newly poured unagglomerated powder 10 in the hopper 4 to flow toward the trough conveyor 9 without obstructing the cutter head assembly 1. When the material control main switch 6 is closed, the material dispensing is stopped, and the cutter head assembly is temporarily sealed in the material receiving barrel 71 for standby use.

[0064] Example 2.

[0065] like Figure 17 As shown, the difference from Example 1 is that: the knife arm 11 is horizontally arranged, the inner end of the knife arm 11 is fixedly connected to the power shaft 2, and the outer end of the knife arm 11 is close to the inner wall of the tube hole 51 of the discharge tube 5, ensuring that the knife arm 11 can not only mill the powder material attached to the wall into blocks when rotating, but also ensure that the outer end of the knife arm 11 does not contact and rub against the inner wall of the tube hole 51 of the discharge tube 5.

[0066] Since the diameter of the tube hole 51 of the discharge tube 5 is relatively small, the length of the blade arm 11 of this design is limited, which determines that the length of the blade arm 2 12 is also limited. Therefore, this embodiment is suitable for situations where the ratio of the diameter of the tube hole 51 of the discharge tube 5 to the diameter of the cylindrical inner cavity 41 of the hopper 4 is relatively large.

[0067] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the scope of protection covered by the present invention. Any modifications in equivalent forms should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A milling device for a hopper mechanism for crushing powder into agglomerates, characterized in that: The invention comprises a cutter head assembly (1) with a top blade facing upward and a power shaft (2) arranged vertically and capable of rotating and lifting. The cutter head assembly (1) is installed at the top end of the power shaft (2) and can rotate and lift with the power shaft (2). It can radially expand and shrink the milling surface. When in use, the cutter head assembly (1) mills and pushes the bulk powder from the bottom to the top from the lower end of the tube hole (51) of the feed pipe (5), so that the bulk powder in the feed pipe (5) to the hopper (4) is milled and crushed and then falls down by itself; the milling machine also comprises a power assembly (3) for driving the power shaft (2) to rotate and lift, and the power assembly (3) establishes a driving relationship with the power shaft (2) at the lower end of the power shaft (2); the cutter head assembly (1) comprises a knife arm 1 (11) and a knife arm 2 (12), and the knife arm 1 (11) has at least two pieces, which are installed on the outer peripheral surface of the top end of the power shaft (2) with equal arc length, and the knife arm 2 (33) is connected to the knife arm 1 The number of (11) is equal, and they are respectively arranged on the lower side of each knife arm (11) and can slide along their respective knife arms (11). The ends of knife arm (11) and knife arm (2) close to the power shaft (2) are inner ends, and the ends away from the power shaft (2) are outer ends. The inner ends of knife arm (11) are connected to the power shaft (2), so that knife arm (11) and knife arm (2) can rotate with the power shaft (2). Knife arm (12) and knife arm (1) are connected. 1), a retraction spring (15) is provided between the blade arm 1 and the blade arm 2 (12), and a centrifugal hammer (14) is provided on the blade arm 2 (12). When the power shaft (2) rotates to a set speed, the centrifugal force F1 generated by the centrifugal hammer (14) can enable the blade arm 2 (12) to overcome the tension of the retraction spring (15) and slide toward the outer end of the blade arm 1 (11) to expand the milling surface of the cutter head assembly. The upper side surfaces of the blade arm 1 (11) and the blade arm 2 (12) are both provided with blade teeth (19).

2. The milling device for a hopper mechanism for crushing agglomerated powder according to claim 1, characterized in that: The cutter head assembly (1) further comprises a cutter arm three (13) having cutter teeth (19) on the upper side thereof, and the cutter arm three (13) is arranged at the top end of the power shaft (2).

3. The milling device for a hopper mechanism for crushable agglomerated powder according to any one of claims 1 or 2, characterized in that: A slide rod seat (16) is provided below the inner end of the knife arm (11), and two upper and lower slide rods (17) are provided on the front end surface of the slide rod seat (16) and extend toward the outer end in parallel with the knife arm (11). The knife arm (12) is provided with two upper and lower parallel slide rod holes (121) along the length direction, and a tension spring hole (122) is provided between the two slide rod holes (121). The slide rod hole (121) and the tension spring hole (122) both pass through the inner end section and the outer end surface of the knife arm (12). The two slide rods (17) are respectively sleeved in the two slide rod holes (121) of the knife arm (12) and can slide in the slide rod holes (121). The retraction spring (15) is located in the tension spring hole (122), and its inner end is fixedly connected to the slide rod seat (16), and its outer end is fixed to the outer end of the tension spring hole (122) by a fixing pin (123).

4. The milling device for a hopper mechanism for crushable agglomerated powder according to claim 2, characterized in that: The inner end of the knife arm (11) is hingedly connected to the power shaft (2) via a hinge shaft (18), and the outer end of the knife arm (11) can freely rotate up and down around the hinge shaft (18). When the knife arm (11) is in a horizontal state, the diameter of the circle drawn by the outer end of the knife arm (11) when rotating horizontally is larger than the diameter of the tube hole (51) of the feed pipe (5) and smaller than the inner diameter of the cylindrical inner cavity (41) of the hopper (4).

5. The milling device for a hopper mechanism for crushable agglomerated powder according to claim 2, characterized in that: The knife arm (11) is arranged horizontally, the inner end of the knife arm (11) is fixedly connected to the power shaft (2), and the outer end of the knife arm (11) is close to the inner wall of the tube hole (51) of the feed tube (5).

6. The milling device for a hopper mechanism for crushable agglomerated powder according to claim 1, characterized in that: The power assembly (3) comprises a guide block (33), a rotation drive unit (31) for driving the power shaft (2) to rotate, a lifting drive unit (32) for driving the power shaft (2) to lift and lower, and a buffer compression spring (34). The power assembly (3) has a guide groove (811) for vertically lifting the milling machine. The lower middle portion of the power shaft (2) and the guide block (33) are located in the guide groove (811). The rotation drive unit (31) is fixed on the guide block (33). A rotation drive relationship is established between the lower end of the power shaft (2) and the rotation drive unit (31). The lifting drive unit (32) is located below the guide block (33). The buffer compression spring (34) is provided between the lifting drive unit (32) and the guide block (33). The lifting drive unit (32) provides a lifting force through the buffer compression spring (34) to lift the power shaft (2).

7. The milling device for a hopper mechanism for crushable agglomerated powder according to claim 6, characterized in that: The rotation drive unit (31) includes a motor (311) and a transmission box (312). One end of the transmission box (312) is located in the guide groove (811) and is fixed to the upper surface of the guide block (33). The transmission box (312) is connected to the lower end of the power shaft (2) through meshing of teeth in the box. The other end of the transmission box (312) is connected to the output shaft (3111) of the motor (311) outside the guide groove (811) through meshing of teeth in the box.

8. The milling device for a hopper mechanism for crushable agglomerated powder according to claim 6, characterized in that: The lifting drive unit (32) includes a second motor (321), a lifting seat (322) and a rack (323). The rack (323) has two racks, which are respectively arranged on the front side wall and the rear side wall of the guide groove (811). The lifting seat (322) is located in the guide groove (811) below the guide block (33). The front and rear sides of the lifting seat (322) respectively have lifting drive gears (3221) that mesh with the rack (323). The second motor (321) is located outside the guide groove (811) and establishes a driving relationship with the lifting drive gear (3221) in the lifting seat (322) through the second output shaft (3211). When the lifting drive gear (3221) rotates to drive the lifting seat (322) to rise, the lifting seat (322) pushes the guide block (33) to rise. When the lifting drive gear (3221) rotates to drive the lifting seat (322) to descend, all milling device components above the guide block (33) follow and descend under the action of gravity.

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