A veterinary granulating device

Abstract

The present application relates to the technical field of granulating device, and particularly relates to a veterinary medicine granulating device, which comprises a conveying assembly, an extruding assembly, an extruding box and a cutting assembly, the extruding box comprises a first shell, a second shell and a third shell arranged in sequence along the horizontal direction; the extruding assembly comprises two forming ring dies and two fixing rings, the two forming ring dies and the two fixing rings divide the extruding box into three independent cavities, the two fixing rings are respectively arranged in the first shell and the third shell; the conveying assembly conveys raw materials into the three cavities; the forming ring dies are connected with a driving assembly which drives the two forming ring dies to move close to or away from each other, the forming ring dies are provided with channels, the cutting assembly is used to cut the material strip extruded from the extruding outlet, and the left and right moving parts can move horizontally relative to each other to change the volume of the cavity in the second shell. The present application can stabilize the granulation of the raw materials with high water content by extruding the raw materials in the three cavities, and the quality of the granules is uniform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of granulating devices, in particular to a veterinary medicine granulating device. BACKGROUND

[0002] In the production and processing of veterinary medicines, granulation is a key step, which aims to process materials in powder state into granular materials with certain shape and size. Granulation not only facilitates animal consumption, but also improves the stability and bioavailability of the drug, ensuring uniform release and absorption of the drug in the animal body. First of all, the uniformity of active ingredients in veterinary granules needs to be strictly guaranteed, and the content deviation needs to be controlled within 5% to avoid individual animal intake dosage difference; secondly, the high moisture granulation process can improve the solubility and bioavailability of the drug.

[0003] The Chinese patent with the authorized announcement number CN210752546U discloses a high-efficiency ring die granulator, which comprises a base, a screw conveying mechanism, a material extruding mechanism, a rotary cutting mechanism and a driving mechanism. The driving mechanism comprises a rotating shaft and a motor. The screw conveying mechanism and the material extruding mechanism are both connected with the end of the rotating shaft. A rack is fixedly arranged on the base, and the rack is sleeved on the rotating shaft. The material extruding mechanism comprises a ring die, an extruding block and a shaft sleeve. The ring die and the shaft sleeve are both sleeved on the rotating shaft. The ring die is fixedly connected with the rack. The shaft sleeve and the ring die form a material extruding cavity. The extruding block is fixedly arranged on the outer ring of the shaft sleeve and located in the material extruding cavity. The top end of the extruding block forms an extruding area with gradually increasing space between the extruding block and the inner ring of the ring die in the rotating direction of the shaft sleeve. The outer periphery of the ring die is provided with a plurality of rows of discharge holes which are in communication with the material extruding cavity. The discharge holes of the ring die are uniformly distributed in the circumferential direction. The discharge hole of the ring die is in communication with the discharge hole of the screw conveying mechanism. The rotary cutting mechanism is rotationally arranged on the outer periphery of the ring die. The material enters the ring die through the screw conveying mechanism. The extruding block in the ring die rotates with the rotating shaft. The material is extruded through the discharge hole of the ring die under the action of the rotary motion of the extruding block. The rotary cutting mechanism outside the ring die cuts the strip-shaped material into granules of different lengths.

[0004] However, the material enters the extruding area between the extruding block and the inner ring of the ring die. The material not only receives the radial thrust of the extruding block along the ring die, but also receives the tangential force of the extruding block rotating around the ring die. During the extrusion process, part of the material can be extruded through the ring die under the radial thrust of the extruding block, and the other part will move circumferentially with the extruding block under the tangential force of the extruding block. Under the condition that the moisture of the material is different, the radial thrust and the tangential force of the extruding block on the material are not stable. The material with too high moisture cannot be effectively extruded due to insufficient radial thrust. SUMMARY

[0005] The present application provides a veterinary medicine granulating device, which aims to solve the problem of uneven granule quality caused by unstable granulation when the moisture content of the raw material is high in the related technology.

[0006] The granulator for veterinary medicine comprises a frame, a conveying assembly, an extruding assembly, an extruding box and a cutting assembly arranged on the frame, the extruding box comprises a first shell, a second shell and a third shell arranged in sequence in the horizontal direction, the extruding assembly comprises two forming ring dies and two fixed rings, the two fixed rings are arranged in the first shell and the third shell respectively and are fixedly connected with the frame, the outer circumferential surfaces of the two fixed rings are in sealing sliding fit with the inner walls of the first shell and the third shell respectively, the two forming ring dies are blocked and fixed at the end portions of the first shell and the third shell respectively, the space between the two fixed rings is divided into three chambers by the two forming ring dies, the conveying assembly is used to convey raw materials into the three chambers, the driving assembly is connected with the two forming ring dies to drive the two forming ring dies to move close to or away from each other, so as to change the volumes of the three chambers, the extruding openings are formed in the outer circumferential surfaces of the forming ring dies, the extruding inlets are arranged on the two end surfaces of the forming ring dies, and the passages are arranged in the forming ring dies to communicate the extruding inlets and the extruding openings one by one, and the cutting assembly is used to cut the material strip extruded from the extruding openings.

[0007] The effect lies in that: in use, the raw materials are conveyed into the three chambers by the conveying assembly. When the two forming ring dies move close to each other, the volume of the middle chamber between them is reduced, so that the raw materials in the middle chamber are extruded from the passages formed in the forming ring dies and extruded to the peripheral wall of the forming ring dies. At this time, the cutting assembly moves relative to the peripheral wall of the forming ring dies to cut the extruded raw materials, so as to form the granules. At the same time, when the driving assembly drives the forming ring dies to move away from each other, the forming ring dies are close to the corresponding fixed rings, so that the volumes of the chambers on both sides are reduced, and the raw materials can also be extruded from the passages formed in the forming ring dies and granulated by the cutting assembly. In the process of reciprocating movement of the forming ring dies driven by the driving assembly, the volumes of the three chambers change to extrude the raw materials, so that the raw materials in the three chambers can still be stably granulated under the condition of high water content, and the quality of the formed granules is uniform. At the same time, the continuity of the pressure can be maintained in the process of extruding the raw materials by the three chambers, so that the pressure fluctuation is small and the extrusion rate is stable.

[0008] Meanwhile, the first shell, the second shell and the third shell are divided into three independent chambers by the two forming ring dies and the two fixed rings. Through the extrusion of the forming ring dies, the extrusion force on the raw materials is easy to control, and the appropriate extrusion force can be selected according to the properties of the raw materials to reduce the energy consumption under the condition of ensuring the compactness of the formed granules.

[0009] Preferably, the left moving part is strip plate one, and the right moving part is strip plate two. Strip plate one and strip plate two extend horizontally and are arranged alternately along the circumference of the forming ring mold. One end of strip plate one is fixed to the end face of one forming ring mold, and one end of strip plate two is fixed to the end face of another forming ring mold. The side walls of strip plate one and strip plate two are in contact and sealed.

[0010] The effect is as follows: one end of strip one is fixed to the end face of one forming ring die, and one end of strip two is fixed to the end face of another forming ring die. When strip one and strip two are staggered in the circumferential direction of the forming ring die, their sides abut against each other to seal, thereby forming a sealed chamber between the two forming ring dies. When the two forming ring dies are relatively close, the material between the two forming ring dies is more fully extruded, reducing the amount of material remaining in the intermediate chamber.

[0011] Preferably, one end of the strip plate away from its fixed forming ring mold passes through a through hole opened in another forming ring mold and is fixedly connected to a support ring; the other end of the strip plate away from its fixed forming ring mold passes through a through hole opened in another forming ring mold and is fixedly connected to another support ring.

[0012] Its effect is as follows: one end of strip one is fixed to the forming ring mold, and the other end passes through a through hole in another forming ring mold to be fixedly connected to the support ring; the support ring can fix multiple strips one together, improving the deformation resistance of strip one. At the same time, strip two can also improve its deformation resistance through another support ring, making the structure more stable; it can also ensure the sealing of the intermediate chamber.

[0013] Preferably, the drive assembly includes a screw and two movable forks threadedly connected to both ends of the screw. The screw is arranged parallel to the length direction of the extrusion box, and the threads at both ends of the screw are arranged in opposite directions. The two movable forks are respectively connected to two forming ring dies one-to-one through a connecting ring.

[0014] Preferably, the cutting assembly includes a cutter head, a slide bar, and a rotating frame. The slide bar is arranged parallel to the length direction of the extrusion box and is fixedly connected to the rotating frame. The cutter head is slidably connected to the slide bar along the length direction of the slide bar and abuts against the outer peripheral wall of the forming ring die. The rotating frame is used to drive the cutter head to rotate around the forming ring die.

[0015] Its effect is that when the rotating frame rotates, it simultaneously drives the slide bar to revolve around the forming ring die. The cutter head driven by the slide bar moves along the peripheral wall of the forming ring die, cutting off the raw material extruded from the peripheral wall of the forming ring die, thereby completing the granulation process.

[0016] Preferably, a driving component for driving the rotating frame to rotate around the axis of the forming ring die is fixedly installed on the frame, and a transmission assembly is provided between the rotating frame and the screw.

[0017] Preferably, the driving member comprises a driven gear and a driving motor; the transmission assembly comprises a ring gear and a planetary gear; the driven gear is coaxially fixed on the rotating frame, the driven gear is driven by the driving motor, the screw rod is rotatably installed on the rotating frame, the planetary gear is coaxially fixed on the end of the screw rod, the ring gear is coaxially arranged with the forming ring die and fixedly connected with the frame, the planetary gear is engaged with the ring gear, and the rotating frame rotates, and the planetary gear drives the screw rod to rotate at the same time.

[0018] Its effect is that when the driving motor drives the rotating frame to rotate, the screw rod on the rotating frame revolves around the forming ring die, and the planetary gear at the end of the screw rod rotates by the cooperation of the planetary gear and the ring gear, and the moving yoke on the screw rod drives the two forming ring dies to move back and forth, so as to match the speed of the cutter head cutting the raw material with the extrusion rate of the forming ring die, and ensure that the length of the prepared particles is relatively consistent.

[0019] Preferably, an annular groove is formed in the outer peripheral wall of the forming ring die, the cutter head is located in the annular groove, and the two side walls of the annular groove are located on the two sides of the cutter head.

[0020] Its effect is that the cutter head is located in the annular groove, the two sides of the cutter head are pushed by the two side walls of the annular groove, the movement of the cutter head is synchronized with the movement of the forming ring die, so that the cutter head can cut the raw material on the forming ring die.

[0021] Preferably, a detachable shaping plate is arranged on the outer wall of the forming ring die, a through hole corresponding to the end of the channel is formed in the shaping plate, an inner side of the two side walls of the annular groove is provided with a clamping groove, the clamping groove extends along the outer wall of the forming ring die, the end of the clamping groove extends to the edge of the forming ring die, and the shaping plate is inserted into the clamping groove from the end of the clamping groove.

[0022] Its effect is that the shaping plate can be inserted into the clamping groove from one end of the clamping groove, and can be pulled out of the clamping groove, so as to realize the detachable connection of the shaping plate and the forming ring die. Replacing the shaping plate with different diameter through holes can extrude particles of different sizes, and improve the applicability.

[0023] Preferably, the conveying assembly comprises an outer cylinder and a spiral conveying shaft, the two ends of the outer cylinder pass out of the two ends of the extrusion box, hoppers are connected to the two ends of the outer cylinder, the spiral conveying shaft is located in the outer cylinder, the spiral blades on the spiral conveying shaft have opposite rotation directions at the two ends, and the spiral conveying shaft cooperates with the outer cylinder to convey the raw material into the three chambers.

[0024] Preferably, the ratio of the length to the diameter of all the channels in the forming ring die is equal.

[0025] By adopting the above technical scheme, the present application has the following beneficial effects:

[0026] The raw material in the middle chamber is extruded from the channel opened on the forming ring die when the two forming ring dies are close to each other, and the extruded raw material is cut by the cutting assembly, so that the particles are formed, meanwhile, when the driving assembly makes the forming ring dies move away from each other, the volume of the chambers on both sides is reduced, and the raw material can also be extruded from the channel opened on the forming ring die and granulated by the cutting assembly, in the process of reciprocating movement of the forming ring die driven by the driving assembly, the volume change of the three chambers extrudes the raw material, reduces the mutual shearing motion between the raw materials, and reduces the energy consumption; meanwhile, when the driving motor drives the rotating frame to rotate, the screw rod on the rotating frame revolves around the forming ring die, and the planetary wheel at the end of the screw rod rotates under the cooperation of the planetary wheel and the gear ring, the moving yoke on the screw rod drives the two forming ring dies to reciprocate, so that the extrusion of the cutter head and the forming ring die is realized at the same time, the length of the prepared particles is more uniform; meanwhile, the detachable connection of the shaping plate and the forming ring die can extrude particles of different sizes by replacing the shaping plate with different diameter through holes, and the applicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a horizontal sectional structure schematic view of a veterinary medicine granulating device of the present application;

[0028] Figure 2 is a position schematic view of a conveying assembly in the embodiment of the present application;

[0029] Figure 3 is a structure schematic view of an extrusion assembly in the embodiment of the present application;

[0030] Figure 4 is a position schematic view of a driving assembly in the embodiment of the present application;

[0031] Figure 5 is a position schematic view of a connecting ring in the embodiment of the present application;

[0032] Figure 6 is a connecting structure schematic view of a driven gear and a driving gear in the embodiment of the present application;

[0033] Figure 7 is a position schematic view of a clamping groove in the embodiment of the present application;

[0034] Figure 8 is a longitudinal sectional structure schematic view of a forming ring die in the embodiment of the present application;

[0035] Figure 9 is a connecting structure schematic view of two forming ring dies and a second shell in the embodiment of the present application.

[0036] Reference signs:

[0037] 1. Hopper; 2. Conveying assembly; 21. Outer cylinder; 22. Screw conveyor shaft; 23. Conveying motor; 24. Feed port; 3. Extrusion assembly; 31. Forming ring die; 311. Through hole; 312. Channel; 313. Annular groove; 314. Slot; 32. Fixing ring; 321. Relief groove; 4. Extrusion box; 41. First housing; 42. Second housing; 421. Strip plate one; 422. Strip plate two; 423. Support ring; 43. Third housing; 5. Cutting assembly; 51. Cutting head; 52. Slide rod; 53. Rotating frame; 6. Drive assembly; 61. Screw; 62. Moving fork; 63. Connecting ring; 7. Frame; 81. Gear ring; 82. Driven gear; 83. Planetary gear; 84. Driving gear; 85. Drive motor; 9. Molding plate; 91. Through hole. Detailed Implementation

[0038] The following is combined with Figures 1 to 9 Embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] This embodiment discloses a veterinary drug granulation device, such as... Figure 1 and Figure 2 As shown, the device includes a hopper 1, a conveying assembly 2, an extrusion assembly 3, and an extrusion chamber 4. The conveying assembly 2 is responsible for conveying raw materials horizontally, and the hopper 1 is connected to both ends of the conveying assembly 2. The hopper 1 is used to hold the raw materials and convey them into the conveying assembly 2. The extrusion chamber 4 is connected to the middle of the conveying assembly 2, and the raw materials are horizontally conveyed from both ends of the hopper 1 into the extrusion chamber 4 through the conveying assembly 2. The extrusion assembly 3 is disposed inside the extrusion chamber 4 and is used to extrude the raw materials inside the extrusion chamber 4. In addition, a cutting assembly 5 is disposed on the outside of the extrusion assembly 3. The cutting assembly 5 is used to cut the strip-shaped raw materials extruded from the extrusion assembly 3, thereby completing the granulation process.

[0040] refer to Figure 2 and Figure 3 The extrusion chamber 4 includes a first housing 41, a second housing 42, and a third housing 43. The first housing 41, second housing 42, and third housing 43 are all cylindrical structures, or in other embodiments, they can be configured as regular prisms, connected sequentially along the conveying direction of the conveying assembly 2. The conveying assembly 2 penetrates the middle of the extrusion chamber 4 and sequentially passes through the first housing 41, second housing 42, and third housing 43. The extrusion assembly 3 is disposed inside the extrusion chamber 4, dividing the interior of the extrusion chamber 4 into three mutually isolated chambers, which are arranged sequentially along the length of the extrusion chamber 4.

[0041] refer to Figure 2The conveying assembly 2 comprises an outer cylinder 21 and a spiral conveying shaft 22. The outer cylinder 21 is provided in a cylindrical shape and has two ends penetrating through for connecting the lower part of the hopper 1. The axis of the outer cylinder 21 coincides with the axis of the extrusion box 4, so that the outer cylinder 21 penetrates out of both ends of the extrusion box 4, and both ends of the outer cylinder 21 are connected with the hopper 1. The spiral conveying shaft 22 is located inside the outer cylinder 21 and cooperates with the outer cylinder 21 to convey the raw materials. The spiral blades on the spiral conveying shaft 22 are opposite in rotation direction at both ends to achieve the conveying of the raw materials from both ends of the outer cylinder 21 to the middle. The end of the spiral conveying shaft 22 is connected with a conveying motor 23 fixed to the outer wall of the outer cylinder 21. The conveying motor 23 can be a servo motor or a stepping motor and has the function of forward and reverse rotation. On the side wall of the outer cylinder 21, three material ports 24 are provided at intervals along the length direction of the outer cylinder 21. In other embodiments, the number of material ports 24 can be more than three. The three material ports 24 correspond to the three chambers in the extrusion box 4 one by one in communication. By driving the spiral conveying shaft 22 with the conveying motor 23, the raw materials enter the outer cylinder 21 from the hopper 1 and are conveyed to the three material ports 24 along the direction of the spiral conveying shaft 22, and then enter the three chambers, so that the raw materials are extruded and formed in the three chambers by the extrusion assembly 3.

[0042] With reference to Figure 2 and Figure 3 The extrusion assembly 3 comprises two forming ring dies 31 and two fixed rings 32. The two fixed rings 32 are sleeved on the outer cylinder 21, and the inner wall of the fixed ring 32 is tightly fixed and sealed to the outer wall of the outer cylinder 21. The two fixed rings 32 are located in the first housing 41 and the third housing 43, respectively. Two forming ring dies 31 are arranged in the area between the two fixed rings 32. The two forming ring dies 31 are also sleeved on the outer cylinder 21 and can be connected slidingly along the length direction of the outer cylinder 21. The forming ring die 31 is sealed to the outer wall of the outer cylinder 21 by a sealing structure, which can be a sealing ring. In this way, the end faces of the two forming ring dies 31 close to each other form the middle chamber of the three chambers arranged in a straight line in order, and the other two end faces of the two forming ring dies 31 form a chamber with the corresponding fixed ring 32, respectively. When the two forming ring dies 31 are close to each other at the same time, the volume of the middle chamber decreases, and the volumes of the other two chambers increase. The raw materials can enter the chambers with increased volume through the material ports 24, while the raw materials in the chambers with decreased volume are extruded. Conversely, when the two forming ring dies 31 move away from each other, they move closer to the corresponding fixed rings 32, so that the volumes of the chambers on both sides decrease and the volume of the middle chamber increases.

[0043] When the middle chamber needs to be fed from one of the material ports 24, the other two chambers are in the extrusion state, so the two material ports 24 will not flow out of the raw materials due to the communication with the chambers. Conversely, when the middle chamber is in the extrusion state, the volumes of the other two chambers increase, thereby allowing the raw materials to enter the two side chambers from the outer cylinder 21 through the material ports 24. At the same time, the raw materials in the middle part of the outer cylinder 21 can also continue to be compressed under the action of the screw conveying shaft 22 to ensure the pressure of the middle chamber, thereby reducing the leakage through the conveying assembly 2.

[0044] Reference Figure 3 The second housing 42 includes strip plate one 421 and strip plate two 422, which are arranged alternately along the circumference of the forming ring mold 31. Both the strip plate one 421 and the strip plate two 422 are long strips. In this embodiment, the cross section of the strip plate one 421 and the strip plate two 422 should be arc-shaped, and in other embodiments, it can also be set as an isosceles trapezoid. The opposite sides of adjacent strip plate one 421 and strip plate two 422 abut each other to achieve sealing. One end of the strip plate one 421 is fixed on the end face of one forming ring mold 31, and one end of the strip plate two 422 is fixed on the end face of another forming ring mold 31. In particular, a plurality of through holes 311 are uniformly and spaced apart on the edge position of the forming ring mold 31, and the length direction of the through hole 311 is parallel to the axis of the forming ring mold 31. The end of the strip plate one 421 away from the fixed forming ring mold 31 will pass through the through hole 311 opened on the other forming ring mold 31, and at the same time, the end of the strip plate two 422 away from the fixed forming ring mold 31 will also pass through the through hole 311 of the corresponding other forming ring mold 31. Therefore, when the two forming ring molds 31 move relative to each other, the strip plate one 421 and the strip plate two 422 will move with the respective fixed forming ring mold 31 and slide in the respective through hole 311. In order to enhance the strength of the strip plate one 421 and the strip plate two 422, a support ring 423 is fixedly arranged after they pass through the respective slidingly connected through hole 311, a plurality of strip plate one 421 are fixed together through a support ring 423, a plurality of strip plate two 422 are fixed together through another support ring 423, and the support ring 423 can be fixed with the end of the strip plate one 421 or the strip plate two 422 by bolt connection. At the same time, the first housing 41 and the third housing 43 are respectively fixed on the other end face of the two forming ring molds 31 away from the strip plate one 421 or the strip plate two 422. In this way, the strip plate one 421 passes through the through hole 311 and enters the first housing 41, and the strip plate two 422 passes through the through hole 311 and enters the third housing 43. The side wall of the fixed ring 32 is also provided with a clearance slot 321 for passing through the strip plate one 421 or the strip plate two 422. The clearance slot 321 not only allows the strip plate one 421 and the strip plate two 422 to pass through, but also prevents the forming ring mold 31 from rotating around the center line thereof.

[0045] A plurality of channels 312 for extruding raw materials are formed in the interior of the forming ring die 31. One end of the channel 312 is an extrusion inlet and is located on the end face of the forming ring die 31, and the other end is an extrusion outlet and is located on the side wall of the forming ring die 31. In order to ensure that the resistance of the plurality of channels 312 is similar, the ratio of the length to the diameter of the channel 312 can be set to be equal, so that the size of the particles obtained is more uniform. It is worth noting that the openings of the channels 312 on the same end face of the forming ring die 31 are uniformly distributed on the two end faces of the forming ring die 31, so that the channels 312 on the two forming ring dies 31 can communicate with the three chambers. When the forming ring die 31 moves, if the volume of one or two of the three chambers decreases, the raw materials will be extruded from the corresponding channel 312, and then form a strip from the side wall of the forming ring die 31. At this time, the cutting assembly 5 cuts the exposed strip to form a granular product.

[0046] Reference Figure 4 and Figure 5 The forming ring die 31 is connected with a driving assembly 6, which is used to reciprocatingly move the forming ring die 31 parallel to the axis direction of the extrusion box 4.

[0047] The driving assembly 6 includes a screw 61 and a moving fork 62. The screw 61 is arranged parallel to the axis of the extrusion box 4, and two or three can be uniformly arranged around the extrusion box 4. The moving fork 62 is threadedly connected with the two or three screws 61, so that when the screw 61 rotates, the moving fork 62 can move along the length direction of the screw 61. A connecting ring 63 is arranged in the U-shaped gap of the moving fork 62, and the connecting ring 63 is fixedly arranged on the first housing 41 and the third housing 43, and the axis of the connecting ring 63 is parallel to the axis of the screw 61. The inner wall of the U-shaped gap of the moving fork 62 blocks the two end faces of the connecting ring 63, and the first housing 41 and the third housing 43 are moved along the axis direction of the screw 61 by the moving fork 62 and the connecting ring 63. The threads at both ends of the screw 61 are arranged in opposite directions, so that two moving forks 62 are arranged in the length direction of the screw 61. The two moving forks 62 correspond to the two connecting rings 63 one by one, and the rotation of the screw 61 moves the two moving forks 62 in opposite directions, thereby moving the first housing 41 and the third housing 43 in opposite directions, and thereby realizing the relative approach or separation of the two forming ring dies 31.

[0048] The cutting assembly 5 comprises a cutter head 51, a slide rod 52 and a rotating frame 53. The rotating frame 53 is rotationally connected with the rack 7, and the rack 7 is used for fixing the hopper 1 and the outer cylinder 21. The rotating frame 53 is coaxially arranged outside the outer cylinder 21. The slide rod 52 is parallel to the length direction of the extrusion box 4, and a plurality of slide rods 52 are arranged around the extrusion box 4. The rotating frame 53 is provided with two rotating frames 53, and the two rotating frames 53 are respectively arranged at the two ends of the outer cylinder 21. The two ends of the slide rod 52 are respectively fixed with the two rotating frames 53, so that the working of the cutter head 51 is stable. The cutter head 51 is slidingly connected with the slide rod 52 along the length direction of the slide rod 52. In the embodiment, the cross section of the slide rod 52 can be square, so that the cutter head 51 does not rotate on the slide rod 52. The cutter head 51 gradually extends from the slide rod 52 to the side wall of the forming ring die 31 and approaches the position of the forming ring die 31, which is the blade part of the cutter head 51. The blade part of the cutter head 51 can abut against the peripheral wall of the forming ring die 31, or a gap of less than 1mm can be left. When the rotating frame 53 rotates, the plurality of cutter heads 51 can be driven to rotate around the peripheral wall of the forming ring die 31, so that the cutter head 51 cuts the strip-shaped raw material extruded from the channel 312.

[0049] With reference to Figure 4 Figure 5 and Figure 6 , the rack 7 is further fixedly provided with a gear ring 81, the rotating frame 53 is coaxially fixedly provided with a connecting cylinder, the connecting cylinder is coaxially fixedly provided with a driven gear 82, the driven gear 82 can drive the rotating frame 53 to rotate, the screw rod 61 is coaxially fixedly provided with a planetary gear 83, and the planetary gear 83 is meshed with the gear ring 81.

[0050] The screw rod 61 is rotationally installed on the rotating frame 53 and located at the edge of the rotating frame 53. The driven gear 82 is meshed with a driving gear 84, the driving gear 84 is connected with a driving motor 85, and the driving motor 85 is fixed on the rack 7. The driving motor 85 can be a double-shaft motor and has a forward and reverse rotation function. The two ends of the driving motor 85 are respectively provided with a driving gear 84, and the two driving gears 84 respectively drive the two rotating frames 53 to rotate. The driving motor 85 drives the driving gear 84 to rotate, the driving gear 84 in turn drives the driven gear 82 to rotate, so that the rotating frame 53 rotates. When the rotating frame 53 rotates, the rotating frame 53 drives a plurality of planetary gears 83 to revolve around the axis of the outer cylinder 21, and the planetary gears 83 also roll in the gear ring 81 to rotate, so that the planetary gears 83 and the screw rod 61 rotate at the same time, and the moving yoke 62 on the screw rod 61 drives the forming ring die 31 to extrude the raw material. At the same time, the raw material extruded on the forming ring die 31 is cut off by the cutter head 51 revolving around the forming ring die 31, so that the granular product is formed. Since the driving motor 85 simultaneously drives the forming ring die 31 to extrude and the cutter head 51 to rotate and cut, the length of the formed granules is relatively uniform.

[0051] With reference to​Figure 7 、 Figure 8 and Figure 9 The outer wall of the forming ring die 31 is provided with an annular groove 313, and the blade part of the cutter head 51 is located in the annular groove 313. The inner walls on both sides of the annular groove 313 are located on both sides of the cutter head 51 to provide a pushing effect. When the forming ring die 31 moves back and forth by moving the fork 62, the forming ring die 31 drives the cutter head 51 to slide on the slide rod 52 by the side wall of the annular groove 313, so as to ensure that the cutter head 51 is always in contact with the outer wall of the forming ring die 31, and continuously cuts the extruded raw material. The molding plate 9 is also installed on the outer wall of the forming ring die 31. The molding plate 9 is made of a bendable steel plate, and the molding plate 9 is provided with a through hole 91 corresponding to the end of the channel 312. The diameter of the through hole 91 determines the diameter of the extruded raw material. The inner side wall of the annular groove 313 is provided with a clamping groove 314, and the two side edges of the molding plate 9 are clamped into the clamping groove 314. The clamping groove 314 extends along the outer wall of the forming ring die 31 for one turn, and extends to the edge of the forming ring die 31 at the end position, so as to facilitate the extraction of the molding plate 9 from the end of the clamping groove 314, and further replace the molding plate 9 with a through hole 91 of different diameter, so as to produce particles of different particle sizes, thereby expanding the application range.

[0052] The working process of the embodiment is as follows: first, the raw material is put into the hopper 1, and the raw material enters the conveying assembly 2 from both ends of the outer cylinder 21, and then the conveying assembly 2 conveys the raw material into the three chambers. The two rotating frames 53 are driven to rotate by the driving motor 85, and the screw rods 61 on the rotating frames 53 are driven to rotate under the meshing action of the planetary gears 83 and the gear rings 81. Then, the moving fork 62 is driven by the screw rods 61 to make the forming ring die 31 extrude the raw material. At the same time, the rotating frame 53 drives the cutter head 51 to revolve on the outer wall of the forming ring die 31 through the slide rod 52. After the raw material is extruded from the channel 312 of the forming ring die 31 to form a strip shape, it is cut into a granular shape by the rotation of the cutter head 51. During the forward and reverse rotation of the driving motor 85, the reciprocating movement of the forming ring die 31 continuously extrudes the raw material, which can improve the efficiency of granulation, and the raw material is extruded in the three chambers, which reduces the shear motion between the raw materials, thereby reducing energy consumption.

[0053] In other embodiments, the second housing 42 can be set as two mutually nested cylinders, and one cylinder is fixedly connected to each of the opposite end faces of the two forming ring dies 31, and the relative movement between the two forming ring dies 31 is adapted by the telescopic function of the second housing 42. The moving fork 62 can be driven along the length direction of the extrusion box 4 by a pneumatic cylinder, an electric cylinder or a hydraulic cylinder, so that the moving fork 62 can be fixedly connected to the forming ring die 31 at a position away from the slide bar 52. In addition, the passages 312 in the forming ring die 31 can be set with different turning angles, so that the resistance values generated by each passage 312 on the raw materials are close. When the pressure required by the three chambers to extrude the raw materials is too large, a one-way valve can be arranged at the position of the material port 24 to prevent the raw materials at the three material ports 24 from flowing back from the chambers to the outer cylinder 21, and the one-way valve is used to allow the raw materials to flow from the outer cylinder 21 to the chambers.

[0054] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A veterinary drug granulation apparatus, comprising a frame and a conveying assembly, an extrusion assembly, an extrusion chamber, and a cutting assembly mounted on the frame, characterized in that, The extrusion box comprises a first shell, a second shell, and a third shell arranged sequentially in a horizontal direction; The extrusion assembly includes two forming ring dies and two fixed rings. The two fixed rings are respectively disposed in the first and third housings and fixedly connected to the frame. The outer circumferential surfaces of the two fixed rings are respectively in a sealing sliding fit with the inner walls of the first and third housings. The two forming ring dies are respectively sealed and fixed to the ends of the first and third housings. The two forming ring dies divide the space between the two fixed rings into three chambers. The conveying assembly is used to convey raw materials into the three chambers. The forming ring die is connected to a drive assembly that moves the two forming ring dies closer or further apart, thereby changing the volume of the three chambers. An extrusion port is provided on the outer circumference of the forming ring die, and an extrusion inlet is provided on both end faces of the forming ring die. A channel is provided inside the forming ring die to connect the extrusion inlet and the extrusion port in a one-to-one correspondence. The cutting assembly is used to cut the strip extruded from the extrusion port. The second housing includes a left moving part and a right moving part. The left and right moving parts are fixedly connected to two forming ring dies and form the inner cavity of the second housing. The left and right moving parts can move horizontally relative to each other to change the volume of the inner cavity of the second housing. The left moving part is strip plate one, and the right moving part is strip plate two. Strip plate one and strip plate two extend horizontally and are arranged alternately along the circumference of the forming ring die. One end of strip plate one is fixed to the end face of one forming ring die, and one end of strip plate two is fixed to the end face of another forming ring die. The side walls of strip plate one and strip plate two are in contact and sealed. One end of the strip away from its fixed forming ring die passes through a through hole in another forming ring die and is fixedly connected to a support ring; The end of the second strip away from its fixed forming ring die passes through a through hole in another forming ring die and is fixedly connected to another support ring.

2. The veterinary drug granulation device according to claim 1, characterized in that, The drive assembly includes a screw and two movable forks threadedly connected to both ends of the screw. The screw is arranged parallel to the length direction of the extrusion box, and the threads at both ends of the screw are arranged in opposite directions. The two movable forks are respectively connected to two forming ring dies one-to-one through a connecting ring.

3. The veterinary drug granulation device according to claim 2, characterized in that, The cutting assembly includes a cutter head, a slide bar, and a rotating frame. The slide bar is arranged parallel to the length direction of the extrusion box and is fixedly connected to the rotating frame. The cutter head is slidably connected to the slide bar along the length direction of the slide bar and abuts against the outer peripheral wall of the forming ring die. The rotating frame is used to drive the cutter head to rotate around the forming ring die.

4. The veterinary drug granulation device according to claim 3, characterized in that, A drive component for driving the rotating frame to rotate around the axis of the forming ring die is fixedly installed on the frame, and a transmission assembly is provided between the rotating frame and the screw.

5. A veterinary drug granulation device according to claim 4, characterized in that, The driving component includes a driven gear and a drive motor; the transmission assembly includes a gear ring and planetary gears; the driven gear is coaxially fixed on the rotating frame and driven by the drive motor; the screw is rotatably mounted on the rotating frame; the planetary gears are coaxially fixed to the end of the screw; the gear ring is coaxially arranged with the forming ring mold and fixedly connected to the frame; the planetary gears mesh with the gear ring; during the rotation of the rotating frame, the planetary gears simultaneously drive the screw to rotate.

6. The veterinary drug granulation device according to claim 5, characterized in that, An annular groove is formed on the outer peripheral wall of the forming ring mold, the cutter head is located in the annular groove, and the two side walls of the annular groove are located on both sides of the cutter head.

7. The veterinary drug granulation device according to claim 1, characterized in that, The conveying assembly includes an outer cylinder and a spiral conveying shaft. The two ends of the outer cylinder extend out from the two ends of the extrusion box. The two ends of the outer cylinder are connected to hoppers. The spiral conveying shaft is located inside the outer cylinder, and the spiral blades on the spiral conveying shaft rotate in opposite directions at both ends. The spiral conveying shaft works with the outer cylinder to convey the raw materials into the three chambers.

8. The veterinary drug granulation device according to claim 1, characterized in that, The ratio of the length to the diameter of all channels within the forming ring mold is equal.

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