Pellet mill die temperature control system
By combining the temperature control system of the water-cooled chamber and the steam chamber, the problem of condensation on the inner wall of the drug sludge conveying cylinder in the pill-making machine was solved, achieving drying and easy cleaning of the drug sludge and improving pill-making efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOPHARM GRP FENGLIAOXING FOSHAN PHARM CO LTD
- Filing Date
- 2025-09-09
- Publication Date
- 2026-06-09
AI Technical Summary
Existing pelleting machines often cause condensation on the inner wall of the pellet conveying cylinder when cooling the pellets, leading to moisture absorption and adhesion of the pellets, increasing extrusion resistance and making them difficult to clean.
A temperature control system combining a water-cooled chamber and a steam chamber is used. Cold water is injected into the water-cooled chamber to remove heat, while steam is introduced into the steam chamber to heat the inner wall of the drug delivery cylinder, preventing condensation and ensuring that the inner wall of the drug delivery cylinder remains dry.
It effectively prevents the pill pellet from getting damp, reduces extrusion resistance, improves cleaning convenience, and achieves stability and efficiency in pill forming.
Smart Images
Figure CN224341816U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pill-making equipment, and in particular to a temperature control system for the extrusion component of a small pill-making machine. Background Technology
[0002] Currently, traditional Chinese medicine pills are typically manufactured through three processes: first, mixing in a mixer; then, extruding the pills through a pelletizing machine; and finally, forming the pills. The extrusion machine uses spiral blades located inside the pill conveyor cylinder to propel the pill mass forward, extruding it from the discharge port at the front of the cylinder to form a strip. The extrusion process generates heat, causing temperature changes in the pill mass inside the machine, which affects the final pill-forming effect, often resulting in open or broken pills. To address this, patent "CN209951809U - A Constant Temperature Extrusion Device for a Pelletizing Machine" proposes a method that uses a cooling water chamber in the main tube wall of the pelletizing machine to cool the internal pill mass, reducing the likelihood of open or broken pills. However, while the cold water chamber cools the drug cartridge, it also lowers the temperature of the drug cartridge delivery cylinder. Especially when the air humidity is high, condensation can easily form on the inner wall of the drug cartridge delivery cylinder due to the low temperature. After the drug cartridge comes into contact with the condensation, it will become damp and stick to the inner wall of the drug cartridge delivery cylinder, which not only increases the resistance of the drug strip extrusion, but also makes it difficult to clean. Utility Model Content
[0003] The purpose of this invention is to provide a temperature control system for the extrusion component of a pellet making machine, which can both cool down the pellets and reduce the generation of condensate, thus preventing the pellets from getting damp.
[0004] To achieve the above objectives, this utility model provides a temperature control system for the extrusion component of a small pellet making machine, including a pellet conveying cylinder. A water-cooling cylinder is connected to the outer side of the outer wall of the pellet conveying cylinder. A gap is left between the inner wall of the water-cooling cylinder and the outer wall of the pellet conveying cylinder. A steam hood is also provided between the inner wall of the water-cooling cylinder and the outer wall of the pellet conveying cylinder. A steam chamber is formed between the inner wall of the steam hood and a portion of the outer wall of the pellet conveying cylinder. A water-cooling chamber is formed between the other portion of the outer wall of the pellet conveying cylinder, the inner wall of the water-cooling cylinder, and the outer wall of the steam hood.
[0005] As a further improvement of this utility model, it includes an inlet pipe and an outlet pipe, both of which are connected to the water-cooling cavity, and a steam input pipe and a steam output pipe, both of which are connected to the steam cavity.
[0006] As a further improvement of this utility model, the steam hood includes multiple first strip-shaped hoods, each first strip-shaped hood being connected to the outer side of the outer wall of the medicine sludge conveying cylinder, and the first strip-shaped hoods being arranged at intervals; the steam chamber includes a first steam chamber, and the first steam chamber is formed between the inner wall of the first strip-shaped hood and the outer wall of the medicine sludge conveying cylinder.
[0007] As a further improvement of this utility model, the steam hood also includes a second strip-shaped hood, which is connected to the outer side of the outer wall of the medicine sludge conveying cylinder; the steam chamber includes a second steam chamber, which is formed between the inner wall of the second strip-shaped hood and the outer wall of the medicine sludge conveying cylinder, and the two ends of the second steam chamber of the second strip-shaped hood are respectively connected to the side walls of the two adjacent first strip-shaped hoods through through holes.
[0008] As a further improvement of this utility model, the length direction of each of the first strip covers is parallel to the length direction of the medicine sludge conveying cylinder, and each of the first strip covers is evenly distributed around the outer wall of the medicine sludge conveying cylinder. The second strip covers are arranged alternately around the outer wall of the medicine sludge conveying cylinder. The steam input pipe and the steam output pipe are set on the two first strip covers that are furthest apart along the steam flow direction.
[0009] As a further improvement of this utility model, the outer walls of both the first strip cover and the second strip cover are covered with a heat insulation layer.
[0010] As a further improvement of this utility model, the water-cooled cavity includes a connected water passage and a cooling zone. The water passage is formed between the top of the outer wall of the first strip cover and the inner wall of the water-cooled cylinder. The cooling zone is formed between the outer walls of two adjacent first strip covers and the outer wall of the drug delivery cylinder. The cooling zone and the first strip cover are alternately arranged on the outside of the drug delivery cylinder. The ratio of the width of the cooling zone to the width of the first strip cover is between 0.8 and 1.2.
[0011] Beneficial effects
[0012] Compared with the prior art, the advantages of the temperature control system for the extrusion component of the pellet making machine of this utility model are:
[0013] 1. After the drug pellet enters the drug pellet conveying cylinder, the spiral blades rotate, driving the pellet to one end and extruding it through the extrusion hole at one end of the conveying cylinder to form a drug strip. Heat is generated during this process. Since cold water is injected into the water-cooling chamber, it carries away the heat from the conveying cylinder. To prevent condensation on the inner wall of the conveying cylinder due to the cooling effect of the water-cooling chamber, steam can be introduced into the steam chamber to heat the inner wall of the conveying cylinder, preventing water vapor condensation and ensuring the inner wall of the conveying cylinder remains dry. This prevents the drug pellet from getting damp and sticking to the inner wall, reducing extrusion resistance and facilitating subsequent cleaning of the conveying cylinder. A steam chamber is formed between the inner wall of the steam hood and one part of the outer wall of the conveying cylinder, while a water-cooling chamber is formed between the other part of the outer wall of the conveying cylinder, the inner wall of the water-cooling cylinder, and the outer wall of the steam hood. The steam chamber and the water-cooling chamber do not interfere with each other and both contribute to the effect on the conveying cylinder.
[0014] 2. The steam hood includes a first strip hood and a second strip hood that are connected to each other. Both the first and second strip hoods are connected to the outer side of the outer wall of the drug delivery cylinder, and are widely distributed, allowing for a more even distribution of steam heat on the inner wall of the drug delivery cylinder. The drug delivery cylinder can be made of a metal material with good thermal conductivity. Although the positions on its inner wall corresponding to the steam chamber are offset from the water-cooling chamber, and vice versa, the good thermal conductivity of the drug delivery cylinder material still allows for a good overall cooling or heating effect.
[0015] 3. The length direction of the first strip hood is parallel to the length direction of the medicine sludge conveying cylinder. Each first strip hood is evenly distributed around the outer wall of the medicine sludge conveying cylinder. The second strip hood is arranged alternately around the outer wall of the medicine sludge conveying cylinder. The steam inlet pipe and the steam outlet pipe are set on the two first strip hoods that are furthest apart along the steam flow direction. This can extend the movement path of the steam in the strip hood, allowing as much of the surface of the medicine sludge conveying cylinder as possible to come into contact with the steam and be heated, resulting in a more uniform heat distribution.
[0016] 4. The outer walls of both the first and second strip covers are covered with a heat insulation layer, which can basically prevent the steam in the steam chamber and the cold water in the water-cooled chamber from directly exchanging heat through the strip covers, avoiding unnecessary energy loss and improving the efficiency of heating or cooling.
[0017] 5. The cooling zone and the first strip hood are alternately arranged on the outside of the drug delivery cylinder. The width ratio between the cooling zone and the first strip hood is between 0.8 and 1.2. This ensures that the width difference between the cooling zone and the first strip hood is small, so that the efficiency of cooling and heating is faster and it is conducive to rapid temperature regulation.
[0018] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A partial sectional view of the front view of the temperature control system of the strip-exit component of a pellet-making machine;
[0021] Figure 2 for Figure 1 AA view;
[0022] Figure 3 for Figure 1 BB view;
[0023] Figure 4 This is a schematic diagram showing the unfolded state of the first and second strip covers. Detailed Implementation
[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings.
[0025] Example
[0026] The specific embodiments of this utility model are as follows: Figures 1 to 4 As shown, a temperature control system for the extrusion component of a small pellet making machine includes a pellet conveying cylinder 2. A water cooling cylinder 5 is connected to the outer side of the outer wall of the pellet conveying cylinder 2. There is a gap between the inner wall of the water cooling cylinder 5 and the outer wall of the pellet conveying cylinder 2. A steam hood 6 is also provided between the inner wall of the water cooling cylinder 5 and the outer wall of the pellet conveying cylinder 2. A steam chamber is formed between the inner wall of the steam hood 6 and a part of the outer wall of the pellet conveying cylinder 2. A water cooling chamber is formed between the other part of the outer wall of the pellet conveying cylinder 2, the inner wall of the water cooling cylinder 5, and the outer wall of the steam hood 6.
[0027] The pellet making machine includes a hopper 1, with a feed inlet 11 at the top. One end of the pellet conveying cylinder 2 of the temperature control system of the pellet output component of the pellet making machine is connected to one side of the hopper 1. A drive motor 4 is installed on the other side of the hopper 1. The drive motor 4 is linked to a spiral blade 3. The spiral blade 3 extends into the inside of the pellet conveying cylinder 2 and the two are arranged on the same axis. When the drive motor 4 is started, it can drive the spiral blade 3 to rotate around its own axis inside the pellet conveying cylinder 2.
[0028] The other end of the drug delivery cylinder 2 is threadedly connected to an end cap 8, which has an extrusion hole 81 for the drug strip to be extruded. A temperature and humidity sensor 9 (model RHT03) is also embedded in the inner wall of this end of the drug delivery cylinder 2. The data cable of the temperature and humidity sensor 9 passes through one side wall of the drug delivery cylinder 2 and connects to an external computer, displaying the temperature and humidity data on the computer screen. The data cable of the temperature and humidity sensor 9 passes through the drug delivery cylinder 2, avoiding the end cap 8. After the drug strip falls into the hopper 1 from the feed inlet 11, it moves towards the extrusion hole 81 under the drive of the rotating spiral blades 3.
[0029] The temperature control system for the extrusion component of the pellet making machine includes a water inlet pipe 51 and a water outlet pipe 52, both of which are connected to the water cooling chamber, and a steam input pipe 64 and a steam output pipe 65, both of which are connected to the steam chamber. The water inlet pipe 51 is located on the side where the extrusion hole 81 is located, and the water outlet pipe 52 is located on the side where the hopper 1 is located.
[0030] The steam hood 6 includes multiple first strip-shaped hoods 61, each first strip-shaped hood 61 being connected to the outer side of the outer wall of the medicine sludge conveying cylinder 2. The first strip-shaped hoods 61 are arranged at intervals; in this embodiment, there are a total of six first strip-shaped hoods 61. The steam chamber includes a first steam chamber 610, which is formed between the inner wall of the first strip-shaped hoods 61 and the outer wall of the medicine sludge conveying cylinder 2. The edges of the first strip-shaped hoods 61 are welded to the outer wall of the medicine sludge conveying cylinder 2.
[0031] The steam hood 6 also includes a second strip hood 62, which is connected to the outer side of the outer wall of the medicine sludge conveying cylinder 2. The steam chamber includes a second steam chamber 620, which is formed between the inner wall of the second strip hood 62 and the outer wall of the medicine sludge conveying cylinder 2. Both ends of the second steam chamber 620 of the second strip hood 62 are connected to the side walls of two adjacent first strip hoods 61 through through holes 63. The two side edges of the second strip hood 62 are welded to the outer wall of the medicine sludge conveying cylinder 2, and the ends of the second strip hood 62 are welded to the side walls of the first strip hoods 61.
[0032] The length direction of each first strip-shaped cover 61 is parallel to the length direction of the medicine sludge conveying cylinder 2. The first strip-shaped covers 61 are evenly distributed around the outer wall of the medicine sludge conveying cylinder 2. Second strip-shaped covers 62 are arranged alternately around the outer wall of the medicine sludge conveying cylinder 2, moving forward and backward. Steam inlet pipe 64 and steam outlet pipe 65 are located on the two first strip-shaped covers 61 that are furthest apart along the steam flow direction, as shown below. Figure 4 As shown. In this embodiment, the length of the first strip cover 61 is basically the same as the length of the medicine sludge conveying cylinder 2, and the front and rear ends of the two are basically flush.
[0033] The outer walls of both the first strip cover 61 and the second strip cover 62 are covered with a heat insulation layer 7, such as aluminum foil composite material, which can basically prevent the steam in the steam chamber and the cold water in the water-cooled chamber from directly exchanging heat through the strip cover, avoiding unnecessary energy loss and improving the efficiency of heating or cooling.
[0034] The water-cooled cavity includes a connected water passage 50 and a cooling zone 53. The water passage 50 is formed between the top of the outer wall of the first strip cover 61 and the inner wall of the water-cooled cylinder 5. The cooling zone 53 is formed between the outer walls of two adjacent first strip covers 61 and the outer wall of the drug delivery cylinder 2. The cooling zone 53 and the first strip cover 61 are arranged alternately around the outer side of the drug delivery cylinder 2. The width ratio of the cooling zone 53 to the first strip cover 61 is between 0.8 and 1.2.
[0035] After the granules enter the granule conveying cylinder 2 from the hopper 1, the spiral blades 3 rotate, driving the granules to one end and extruding them from the extrusion hole 81 at one end of the granule conveying cylinder 2 to form granule strips. Heat is generated during this process. During the operation of the pelleting machine, the temperature and humidity sensor 9 monitors the temperature and humidity inside the granule conveying cylinder 2 in real time and feeds the data back to the operator via an external display screen. Since cold water has been injected into the water-cooling chamber through the water inlet pipe 51, the cold water exchanges heat with the granules inside the granule conveying cylinder 2 through the side wall of the cooling zone 53, thus carrying away the heat from the granule conveying cylinder. To prevent condensation on the inner wall of the drug delivery cylinder 2 due to the cooling effect of the water-cooling chamber, when the temperature and humidity sensor 9 detects that the internal humidity of the drug delivery cylinder 2 has risen to a certain value, steam can be introduced into the steam chamber through the steam input pipe 64. The steam heats the outer wall of the drug delivery cylinder, thereby heating the inner wall of the drug delivery cylinder 2. This prevents water vapor condensation on the inner wall of the drug delivery cylinder 2, ensuring that the inner wall of the drug delivery cylinder 2 is dry. The drugs are less likely to become damp and stick to the inner wall of the drug delivery cylinder 2, reducing the resistance to drug extrusion and facilitating subsequent cleaning of the drug delivery cylinder 2. A steam chamber is formed between the inner wall of the steam hood and one part of the outer wall of the drug delivery cylinder, while a water-cooling chamber is formed between the other part of the outer wall of the drug delivery cylinder, the inner wall of the water-cooling cylinder, and the outer wall of the steam hood. The steam chamber and the water-cooling chamber do not interfere with each other, but both can affect the drug delivery cylinder.
[0036] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.
Claims
1. A temperature control system for the extrusion component of a pellet making machine, comprising a pellet conveying cylinder (2), a water-cooling cylinder (5) connected to the outer side of the outer wall of the pellet conveying cylinder (2), and a gap between the inner wall of the water-cooling cylinder (5) and the outer wall of the pellet conveying cylinder (2), characterized in that, A steam hood (6) is provided between the inner wall of the water-cooled cylinder (5) and the outer wall of the drug delivery cylinder (2). A steam cavity is formed between the inner wall of the steam hood (6) and a part of the outer wall of the drug delivery cylinder (2). A water-cooled cavity is formed between the other part of the outer wall of the drug delivery cylinder (2), the inner wall of the water-cooled cylinder (5), and the outer wall of the steam hood (6).
2. The temperature control system for the extrusion component of a pellet-making machine according to claim 1, characterized in that, It includes an inlet pipe (51) and an outlet pipe (52) that are both connected to the water-cooled cavity, and a steam input pipe (64) and a steam output pipe (65) that are both connected to the steam cavity.
3. The temperature control system for the extrusion component of a pellet-making machine according to claim 2, characterized in that, The steam hood (6) includes multiple first strip hoods (61), each first strip hood (61) is connected to the outer side of the outer wall of the medicine sludge conveying cylinder (2), and the first strip hoods (61) are arranged at intervals; the steam chamber includes a first steam chamber (610), and the first steam chamber (610) is formed between the inner wall of the first strip hood (61) and the outer wall of the medicine sludge conveying cylinder (2).
4. The temperature control system for the extrusion component of a pellet-making machine according to claim 3, characterized in that, The steam hood (6) also includes a second strip hood (62), which is connected to the outer side of the outer wall of the medicine sludge conveying cylinder (2); the steam chamber includes a second steam chamber (620), which is formed between the inner wall of the second strip hood (62) and the outer wall of the medicine sludge conveying cylinder (2), and the two ends of the second steam chamber (620) of the second strip hood (62) are respectively connected to the side walls of the two adjacent first strip hoods (61) through through holes (63).
5. The temperature control system for the extrusion component of a pellet-making machine according to claim 4, characterized in that, The length direction of each of the first strip covers (61) is parallel to the length direction of the medicine ball conveying cylinder (2). Each of the first strip covers (61) is evenly distributed around the outer wall of the medicine ball conveying cylinder (2). The second strip covers (62) are arranged alternately around the outer wall of the medicine ball conveying cylinder (2). The steam input pipe (64) and the steam output pipe (65) are set on the two first strip covers (61) that are furthest apart along the steam flow direction.
6. A temperature control system for the extrusion component of a pellet-making machine according to claim 4 or 5, characterized in that, The outer walls of the first strip cover (61) and the second strip cover (62) are both covered with a heat insulation layer (7).
7. A temperature control system for the extrusion component of a pellet-making machine according to claim 4 or 5, characterized in that, The water-cooled cavity includes a connected water passage (50) and a cooling zone (53). The water passage (50) is formed between the top of the outer wall of the first strip cover (61) and the inner wall of the water-cooled cylinder (5). The cooling zone (53) is formed between the outer walls of two adjacent first strip covers (61) and the outer wall of the drug delivery cylinder (2). The cooling zone (53) and the first strip cover (61) are alternately arranged on the outside of the drug delivery cylinder (2). The width ratio of the cooling zone (53) and the first strip cover (61) is between 0.8 and 1.2.