Low-endotoxin puffed sterile rat food production device

Abstract

The utility model provides a low endotoxin puffed sterile rat food production device which comprises a supporting frame, a material mixing mechanism, a bulking machine, a cabinet body, a grouting mechanism, a segmented cutting mechanism and an ultraviolet disinfection mechanism, the bulking machine is transversely installed on the supporting frame, the material mixing mechanism is fixedly installed at the front end of the bulking machine, and the bulking machine is installed on the cabinet body. A discharge port in the bottom of the mixing mechanism is opposite to a feed port in the front end of the bulking machine; the cabinet body is arranged at the downstream position of the supporting frame, and a grouting mechanism, a segmented cutting mechanism and an ultraviolet disinfection mechanism are installed on the cabinet body. The feeding end of the grouting mechanism is connected with the bulking machine through a feeding channel, and the discharging end of the grouting mechanism is connected with the ultraviolet disinfection mechanism through a discharging channel via the segmented cutting mechanism. The production device provided by the utility model can sequentially realize premixing of raw materials, puffing extrusion molding, continuous grouting and cutting and oxidation detoxification treatment of puffed particles, realizes efficient, automatic and continuous production, guarantees nutrition balance of puffed feed, and guarantees efficient growth of mice.

Description

Technical Field

[0001] This utility model relates to an animal feed processing equipment, and more particularly to a low endotoxin extruded sterile rat feed production device. Background Technology

[0002] To meet the nutritional and microbiological requirements of germ-free mice, specialized germ-free mouse feed is generally used. Laboratory animal feeds can be divided into grain-based compound feeds and purified compound feeds. Grain-based feeds contain 100 to 300 times more endotoxins than purified feeds. The regular diet (daily ration) fed to germ-free mice is specifically designed for their metabolic characteristics. The purified feed used for germ-free mice differs from feeds used under normal conditions. It requires specialized extruded feed designed according to the metabolic needs of germ-free mice, and the raw materials must be selected with low bacterial loads. This makes it easier to achieve complete sterility in germ-free mouse feed.

[0003] Traditional extruded feed for mouse rearing typically uses steam sterilization to meet aseptic requirements. This process destroys many nutrients, leading to nutritional deficiencies in germ-free mice. Furthermore, due to the significant metabolic changes in germ-free mice, conventional mouse feed cannot meet their needs. Moreover, existing extruded feeds often require the fortification of various nutrients, such as protein, fat, carbohydrates, vitamins, and minerals, to meet the nutritional requirements of mice. Additionally, the heating process during production and subsequent sterilization of extruded feed can cause the added vitamins and enzymes to degrade due to increased temperature, leading to reduced enzyme activity and nutrient loss. Therefore, formulators must comprehensively consider the stability of vitamins, losses during processing and storage, and the additional vitamin requirements of animals under various stress conditions when designing feed formulations. A reasonable assessment of the amount of vitamins added to germ-free mouse feed is necessary to ensure that the feed meets the nutritional needs of germ-free mice after sterilization. Utility Model Content

[0004] This invention addresses the aforementioned technical deficiencies in existing extruded feed for mouse feeding by providing a low-endotoxin extruded sterile mouse feed production device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a low-endotoxin extruded sterile rodent feed production device, including a support frame, a mixing mechanism, an extruder, a cabinet, a slurry injection mechanism, a segmented cutting mechanism, and an ultraviolet disinfection mechanism, wherein:

[0007] The extruder is horizontally mounted on the support frame, and the mixing mechanism is fixedly mounted at the front end of the extruder, with the discharge port at the bottom of the mixing mechanism facing the feed port at the front end of the extruder.

[0008] The cabinet is located downstream of the support frame and is equipped with the grouting mechanism, the segmented cutting mechanism and the ultraviolet disinfection mechanism. The feeding end of the grouting mechanism is connected to the extruder through the feeding channel, and the discharging end is connected to the ultraviolet disinfection mechanism through the discharging channel via the segmented cutting mechanism.

[0009] Preferably, the mixing mechanism is located at the input end of the extruder, with a stirring paddle at its axial center, a discharge port at an eccentric position at the bottom, and a heating jacket on its outer periphery, wherein:

[0010] The lower end of the stirring paddle is connected to the stirring motor; the discharge port is a square round hole, which is directly opposite the feed port of the extruder; and the upper and lower ends of the heating jacket are respectively provided with a water inlet and a water outlet arranged diagonally.

[0011] Preferably, the extruder is a twin-screw extruder, which is fixedly mounted on a support frame, and the input end of the extrusion screw is connected to the extrusion motor via a coupling.

[0012] Preferably, the cabinet is a rectangular box structure, which is divided into a left box and a right box with an open top by a partition, which are used to install the grouting mechanism and the ultraviolet disinfection mechanism respectively, and support feet are provided at the four corners of its bottom.

[0013] Preferably, the grouting mechanism includes an annular groove, an annular guide assembly, a rotating disk, a hollow rotating shaft, a grouting motor, and a plurality of grouting needles, wherein:

[0014] The annular trough has an opening at the top, a supporting column is vertically arranged at the central axis, and an arc-shaped grouting channel is arranged at the bottom near the outer perimeter. The front and rear ends of the grouting channel are respectively connected to the feed channel and the discharge channel.

[0015] More preferably, the annular guide assembly includes an inner annular guide rail and an outer annular guide rail arranged coaxially, and the inner annular guide rail and the outer annular guide rail are respectively provided with a high guide groove and a low guide groove of different heights and connected end to end along their circumference.

[0016] The rotating disk has a disc-shaped structure with a welding hole in the middle and several needle mounting holes arranged in a ring at equal intervals on the outer periphery. The welding hole in the middle is fixedly connected to the top of the hollow rotating shaft.

[0017] Preferably, the upper and lower ends of the hollow rotating shaft are rotatably mounted on the support column through bearings, and the driven gear located at its bottom end in the left housing meshes with the driving gear on the output shaft of the grouting motor.

[0018] Several grouting needles are limited and installed in the corresponding needle mounting holes, with the guide block in the middle being movably embedded in the corresponding high guide groove or low guide groove, and the top end is provided with a horizontally arranged grout output pipe.

[0019] More preferably, a cylindrical slurry distribution component is fixedly provided at the top of the support column, and the outer wall of the slurry distribution component is provided with a plurality of first distribution holes communicating with its inner cavity at the position corresponding to the position of the low guide groove.

[0020] The top of the slurry distribution component is provided with a slurry input pipe that is sealed and communicates with its inner cavity, and a rotatable and sealed slurry distribution ring is provided on the outer side. Several second distribution holes that connect to the slurry output pipe are equally spaced on the circumference of the slurry distribution ring.

[0021] The low-position guide groove is located in the middle of the grouting channel, and its arc length is at least four times the length of the grouting needle station. Only the grouting needle located in the low-position guide groove is connected to the inner cavity of the grouting distribution component through the grout output pipe and the grout distribution ring to form a grouting passage.

[0022] Preferably, the ring grouting mechanism further includes a first conveying roller assembly and a second conveying roller assembly respectively disposed at the positions of the feed channel and the discharge channel, wherein:

[0023] Both the first conveyor roller assembly and the second conveyor roller assembly are active conveyor rollers driven by servo motors; and a conveyor belt extending to the ultraviolet disinfection mechanism is provided on the discharge channel downstream of the segmented cutting mechanism.

[0024] Preferably, the ultraviolet disinfection mechanism includes a barrel, a central sleeve, a first UV-C ultraviolet lamp array, a spiral conveying channel, and a second UV-C ultraviolet lamp array, wherein:

[0025] The upper end of the barrel is provided with a feeding slide that connects to the discharge channel, the lower end is provided with a discharge slide, and the top of the barrel is detachably provided with a barrel cover.

[0026] The central sleeve and the spiral conveying channel are both made of transparent glass and are coaxially located at the center of the barrel. The first UV-C ultraviolet lamp array is installed inside them.

[0027] The spiral conveying channel is spirally arranged on the inner wall of the barrel, with its upper and lower ends connected to the feeding slide and the discharging slide, respectively, and a second UV-C ultraviolet lamp array is arranged at its bottom along its length.

[0028] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0029] This invention employs a grouting mechanism to sequentially fill the extruded puffed feed with nutrient-rich slurry, and a segmented cutting mechanism to cut and press the strip-shaped puffed product to prevent nutrient loss. The cut and segmented puffed granules are then individually fed into an ultraviolet sterilization mechanism, where UV-C ultraviolet lamp arrays thoroughly oxidize endotoxins on the puffed granules, completing the sterilization process. Using this integrated preparation device to produce granular puffed sterile mouse feed enables efficient, automated, and continuous production by sequentially performing raw material premixing, puffing extrusion molding, continuous grouting, and puffed granule cutting and oxidation / detoxification. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a low endotoxin extruded sterile rat feed production device according to the present invention.

[0031] Figure 2 This is a schematic diagram of the installation structure of the mixing mechanism and the extruder in a low endotoxin extruded aseptic rat feed production device of this utility model.

[0032] Figure 3 This is a schematic diagram of the main structure of a low endotoxin extruded sterile rat feed production device of the present invention, which integrates the cabinet, grouting mechanism, segmented cutting mechanism and ultraviolet disinfection mechanism into one unit.

[0033] Figure 4 This is a cross-sectional structural diagram showing the integrated assembly of the cabinet, grouting mechanism, segmented cutting mechanism, and ultraviolet disinfection mechanism in a low endotoxin extruded aseptic rat feed production device of this utility model.

[0034] Figure 5 This is a top view of the integrated structure of the cabinet, grouting mechanism, segmented cutting mechanism and ultraviolet disinfection mechanism in the low endotoxin extruded sterile rat feed production device of this utility model.

[0035] Figure 6 This is a schematic diagram of the three-dimensional structure of a low-endotoxin extruded aseptic rat feed production device, which integrates the cabinet, grouting mechanism, segmented cutting mechanism, and ultraviolet disinfection mechanism into one unit. Figure 1 ;

[0036] Figure 7This is a schematic diagram of the three-dimensional structure of a low-endotoxin extruded aseptic rat feed production device, which integrates the cabinet, grouting mechanism, segmented cutting mechanism, and ultraviolet disinfection mechanism into one unit. Figure 2 ;

[0037] Figure 8 This is a three-dimensional structural diagram of a low endotoxin extruded aseptic rat feed production device of this utility model, in which the cabinet, grouting mechanism and segmented cutting mechanism are assembled into one unit.

[0038] Figure 9 This is a schematic diagram of the ultraviolet disinfection mechanism in a low-endotoxin extruded aseptic rat feed production device of this utility model. Figure 1 ;

[0039] Figure 10 This is a schematic diagram of the ultraviolet disinfection mechanism in a low-endotoxin extruded aseptic rat feed production device of this utility model. Figure 2 ;

[0040] Figure 11 This is a schematic diagram of the ultraviolet disinfection mechanism in a low-endotoxin extruded aseptic rat feed production device of this utility model. Figure 3

[0041] Figure 12 This is a schematic diagram of the structure of the annular guide assembly and rotating disk on the grouting mechanism of a low-endotoxin extruded aseptic rat feed production device according to this utility model. Figure 1 ;

[0042] Figure 13 This is a schematic diagram of the structure of the annular guide assembly and rotating disk on the grouting mechanism of a low-endotoxin extruded aseptic rat feed production device according to this utility model. Figure 2 ;

[0043] Figure 14 This is a schematic diagram of the structure of the annular guide assembly and rotating disk on the grouting mechanism of a low-endotoxin extruded aseptic rat feed production device according to this utility model. Figure 3 ;

[0044] Figure 15 This is a schematic diagram of the grouting needle in the grouting mechanism of a low endotoxin extruded aseptic rat feed production device of this utility model. Detailed Implementation

[0045] The present invention will be described in detail below through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of the present invention.

[0046] like Figure 1As shown, in order to realize the continuous and automatic production of pelleted extruded sterile mouse feed, a low endotoxin extruded sterile mouse feed production device is provided, which mainly includes a support frame 100, a mixing mechanism 200, an extruder 300, a cabinet 400, a grouting mechanism 500, a segmented cutting mechanism 600, and an ultraviolet disinfection mechanism 700.

[0047] like Figure 2 As shown, the extruder 300 is horizontally mounted on the support frame 100. The mixing mechanism 200 is fixedly mounted at the front end of the extruder 300, and the discharge port 203 at the bottom of the mixing mechanism 200 is directly opposite the feed port at the front end of the extruder 300. After adding pulverized casein, corn starch, wheat starch, microcrystalline cellulose, sucrose, and soybean oil to the mixing mechanism 200, the stirring motor 202 is started to thoroughly mix the materials. Water is added and the mixture is conditioned at 30-35°C to obtain the main extruded slurry. The obtained main extruded slurry is fed into the extruder 300 below through the discharge port 203 at the bottom of the mixing mechanism 200 for extrusion.

[0048] like Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the cabinet 400 is located downstream of the support frame 100. The cabinet 400 and the support frame 100 can be integrated into a single structure to form a single unit. The grouting mechanism 500, the segmented cutting mechanism 600, and the ultraviolet disinfection mechanism 700 are installed at their respective positions on the cabinet 400 according to the process flow.

[0049] Specifically, the feeding end of the grouting mechanism 500 is connected to the extruder 300 through the feeding channel 501, and the discharging end is connected to the ultraviolet disinfection mechanism 700 through the discharging channel 503 via the segmented cutting mechanism 600. The extruded product formed by the extruder 300 is fed into the grouting mechanism 500 while hot, and the filling slurry obtained in step 1 is injected into the extruded product one by one using an injection mechanism 560 with several annular interval steps. Then, it is sent to the segmented cutting mechanism 600 through the discharging channel 503 to be cut into extruded particles of equal length, and the two ends of the extruded particles are squeezed and glued together to form a sealed shape, and then naturally cooled and solidified.

[0050] In some of these embodiments, such as Figure 1 and Figure 2 As shown, the mixing mechanism 200 is located at the input end of the extruder 300, and is used for heating and mixing the main material. A stirring paddle 201 is located at its axial position, and a discharge port 203 is located at an eccentric position at the bottom.

[0051] Specifically, the lower end of the stirring paddle 201 is sealed and mounted on the barrel body using a bearing, and is connected to the stirring motor 202 via a coupling, which drives the stirring paddle 201 to rotate. To improve the feeding efficiency of the extruder 300 and avoid clogging problems, the discharge port 203 is a square circular hole, which is directly opposite the feed port of the extruder 300 and arranged along the length of the extruder 300.

[0052] In addition, as needed, a heating jacket 204 is provided on the outer periphery of the mixing mechanism 200, and a temperature probe is provided on the heating jacket 204 for real-time monitoring of the temperature of the heating jacket 204. A water inlet 205 and a water outlet 206 are respectively provided at the upper and lower ends of the heating jacket 204, arranged diagonally. Solenoid valves are provided at the water inlet 205 and the water outlet 206, and circulating water is connected to them through hoses.

[0053] In some of these embodiments, such as Figure 1 and Figure 2 As shown, the extruder 300 is a twin-screw extruder, which is fixedly installed on the support frame 100, and the input end of the extrusion screw 301 inside is connected to the extrusion motor 302 through the coupling 303.

[0054] In some of these embodiments, such as Figure 8 As shown, the cabinet 400 is a rectangular box structure, welded from steel, possessing sufficient structural strength and ensuring safety and stability. To facilitate the rational arrangement of the grouting mechanism 500 and the ultraviolet disinfection mechanism 700, the cabinet 400 is divided into two parts by a partition: a left box 401 with an open top and a right box 402, used to install the grouting mechanism 500 and the ultraviolet disinfection mechanism 700 respectively. Support feet 403 are provided at the four corners of the bottom of each part. The support feet 403 are adjustable, allowing adjustment of the cabinet 400's level according to the installation surface, ensuring smooth installation.

[0055] In some of these embodiments, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the grouting mechanism 500 mainly includes an annular groove 510, an annular guide assembly 520, a rotating disk 530, a hollow rotating shaft 540, a grouting motor 550, and a number of grouting needles 560. The annular guide assembly 520, the rotating disk 530, the hollow rotating shaft 540, and the number of grouting needles 560 are installed in the annular groove 510.

[0056] Specifically, such as Figure 8As shown, the annular trough 510 is a circular annular trough structure with an open top. A support column 511 is vertically arranged at its central axis position for mounting the rotating disk 530 and the hollow rotating shaft 540. An arc-shaped grouting channel 502 is provided at the bottom of the annular trough 510 near the outer periphery. The front and rear ends of the grouting channel 502 are respectively connected to the feed channel 501 and the discharge channel 503. The feed channel 501, the grouting channel 502, and the discharge channel 503 constitute the puffed product conveying path connecting the puffing machine 300 and the ultraviolet disinfection mechanism 700 according to the production process.

[0057] like Figure 9 , Figure 10 and Figure 11 As shown, the annular guide assembly 520 includes an inner annular guide rail 522 and an outer annular guide rail 523 arranged coaxially. The inner and outer annular guide rails 522 and 523 are respectively provided with a high-position guide groove 524 and a low-position guide groove 525 of different heights connected end-to-end along their circumference. In the vertical plane, the horizontal height of the high-position guide groove 524 is greater than that of the low-position guide groove 525, but in the horizontal plane, the high-position guide groove 524 and the low-position guide groove 525 are connected end-to-end, forming a closed-loop circular guide groove used for limiting the installation of the grouting needle 560.

[0058] In use, the grouting needle 560 rotates cyclically along the circular guide groove, and when passing through the high guide groove 524 and the low guide groove 525, the grouting needle 560 rises and falls, thereby realizing the descent and insertion or withdrawal action of the hollow tubular puffed product.

[0059] like Figure 9 , Figure 10 and Figure 11 As shown, the rotating disk 530 has a disc-shaped structure and is made of aluminum alloy or stainless steel. It has a welding hole 531 in the middle and several needle mounting holes 532 arranged in a ring at equal intervals on the outer periphery. These holes are used to weld and connect the hollow rotating shaft 540 and to install each grouting needle 560.

[0060] The upper and lower ends of the hollow rotating shaft 540 are rotatably mounted on the support column 511 via bearings, and the driven gear 541 at its bottom end, located inside the left housing 401, meshes with the driving gear 551 on the output shaft of the grouting motor 550. Because the top end of the hollow rotating shaft 540 is fixedly connected to the welding hole 531 in the middle of the rotating disk 530 by welding, starting the grouting motor 550 synchronously drives the rotating disk 530 to rotate via the hollow rotating shaft 540.

[0061] like Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 12 As shown, several grouting needles 560 are limited and installed in corresponding needle mounting holes 532. The guide blocks 561 in their middle rotate alternately into the corresponding high guide groove 524 or low guide groove 525 as the rotating disk 530 rotates. Each grouting needle 560 has a limiting block 562 at its upper end, and there is a certain distance between the limiting block 562 and the guide block 561 below, which can satisfy the lifting space for the grouting needle 560 to move up and down.

[0062] The top of the grouting needle 560 is provided with a horizontally arranged grout output pipe 563. The inner cavity of the grouting needle 560 is connected to the external filling grout discharge tank through the grout output pipe 563. The filling grout is injected into the hollow tubular expanded product through a delivery pump to complete the grouting action.

[0063] It is worth noting that, such as Figure 4 and Figure 8 As shown, a cylindrical slurry distribution component 512 is welded to the top of the supporting column 511. The slurry distribution component 512 has a hollow structure. Several first distribution holes communicating with the inner cavity are formed on the outer wall of the slurry distribution component 512 at positions corresponding to the low-position guide groove 525. A slurry input pipe 513, which is sealed and communicates with the inner cavity, is provided at the top of the slurry distribution component 512. A rotatable and sealed slurry distribution ring 514 is coaxially arranged on the outer side. Several second distribution holes connecting to the slurry output pipe 563 are equidistantly formed on the circumference of the slurry distribution ring 514. The slurry input pipe 513 is connected to a slurry storage tank via a delivery pump. The slurry storage tank contains a nutrient solution formed by mixing minerals, vitamins, methionine, choline chloride, lecithin, and fructooligosaccharides.

[0064] The low-position guide groove 525 is located in the middle of the grouting channel 502, and its arc length is at least four times the length of the grouting needle 560 station. Only the grouting needle 560 located in the low-position guide groove 525 is connected to the inner cavity of the grouting distribution component 512 through the grout output pipe 563 and the grout distribution ring 514 to form a grouting passage.

[0065] In use, when the corresponding grouting needle 560 rotates from the high guide groove 524 to the low guide groove 525, the needle at the lower end of the grouting needle 560 moves down and pierces the inner cavity of the puffed product. The second distribution hole at the other end of the grouting needle 560 is connected to the plurality of first distribution holes in sequence, and the grout is injected into the hollow tubular puffed product through the grouting needle 560. When the corresponding grouting needle 560 rotates from the high guide groove 524 to the low guide groove 525, the needle at the lower end of the grouting needle 560 rises and is pulled out from the inner cavity of the puffed product. At this time, the second distribution hole at the other end of the grouting needle 560 rotates to a certain angle and is no longer connected to the first distribution hole, and the grouting into the inner cavity of the puffed product stops.

[0066] Furthermore, in some of these embodiments, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the ring grouting mechanism 500 also includes a first conveying roller assembly 504 and a second conveying roller assembly 505 respectively disposed at the positions of the feed channel 501 and the discharge channel 503. The first conveying roller assembly 504 and the second conveying roller assembly 505 both adopt a conventional double-roller conveying structure design, and their specific structure and working principle are known technologies, which will not be described in detail here.

[0067] As required, both the first conveying roller assembly 504 and the second conveying roller assembly 505 are active conveying rollers, driven by servo motors, used to pull and convey the strip-shaped puffed products extruded by the puffing machine 300. The strip-shaped puffed products pass between the upper and lower rollers, and the pulling and conveying of the strip-shaped puffed products is achieved by utilizing the friction between the upper and lower rollers and the strip-shaped puffed products.

[0068] The segmented cutting mechanism 600 adopts a conventional double-roller cutting device, which also uses a double-roller conveying structure design. Cutters are set on the circumferential surfaces of both the upper and lower rollers. Its specific structure and working principle are known technologies and will not be described in detail here. The strip-shaped puffed product passes between the upper and lower rollers. The cutters on the upper and lower rollers cut the strip-shaped puffed product into equal lengths. The pressure action of the cutters and the upper and lower rollers compresses and seals the open ends of the puffed particles, which then solidifies after cooling.

[0069] A conveyor belt extending to the ultraviolet disinfection mechanism 700 is provided on the discharge channel 503 downstream of the segmented cutting mechanism 600. The conveyor belt is a transmission belt, which is used to send the puffed particles cut by the segmented cutting mechanism 600 into the ultraviolet disinfection mechanism 700 for oxidation and detoxification treatment.

[0070] In some of these embodiments, such as Figure 4 , Figure 13 , Figure 14 and Figure 15As shown, the ultraviolet disinfection mechanism 700 is an oxidation and detoxification device for expanded particles, which mainly includes a barrel 701, a central sleeve 702, a first UV-C ultraviolet lamp array 703, a spiral conveying channel 704, and a second UV-C ultraviolet lamp array 705.

[0071] The upper end of the barrel 701 is provided with a feed chute 706 that connects to the discharge channel 503, and the lower end is provided with a discharge chute 707. A barrel cover 708 is detachably provided on the top of the barrel 701. The barrel cover 708 is provided with a transparent observation window 709 and a handle 710.

[0072] To improve the UV disinfection effect of the puffed granules, the central sleeve 702 and the spiral conveying channel 704 are both made of transparent glass and are coaxially located at the center of the barrel 701. The first UV-C UV lamp array 703 is installed inside the central sleeve 702, and the UV light from the first UV-C UV lamp array 703 passes through the central sleeve 702 and irradiates the puffed granules from the side.

[0073] The spiral conveying channel 704 is spirally arranged on the inner wall of the barrel 701, with its upper and lower ends connected to the feed chute 706 and the discharge chute 707, respectively. A second UV-C ultraviolet lamp array 705 is arranged along its length at its bottom. By placing the second UV-C ultraviolet lamp array 705 at the bottom of the spiral conveying channel 704, the ultraviolet light from the second UV-C ultraviolet lamp array 705 can irradiate the puffed particles from above, achieving thorough oxidation and sterilization of the puffed particles.

[0074] The spiral conveying channel 704 within the ultraviolet disinfection mechanism 700 adopts a spiral structure design, with a first UV-C ultraviolet lamp array 703 positioned at its inner center and a second UV-C ultraviolet lamp array 705 laid at the bottom of the spiral conveying channel 704. This achieves ultraviolet irradiation of the extruded feed in different directions, ensuring no blind spots in irradiation. Simultaneously, it extends the oxidation and disinfection time of the extruded particles within the ultraviolet disinfection mechanism 700 to a certain extent, and the irradiation dose of the first UV-C ultraviolet lamp array 703 and the spiral conveying channel 704 can be appropriately reduced as needed to avoid damage to other nutrients.

[0075] The extruded sterile mouse feed production device capable of endotoxin treatment mainly consists of a support frame 100, a mixing mechanism 200, an extruder 300, a cabinet 400, a grouting mechanism 500, a segmented cutting mechanism 600, and an ultraviolet disinfection mechanism 700, forming an integrated production equipment. When used to produce pellet-type extruded sterile mouse feed, it can sequentially realize raw material premixing, extrusion molding, continuous grouting, and cutting and oxidation detoxification of extruded pellets, achieving efficient, automatic, and continuous production.

[0076] Based on such Figures 1 to 15The apparatus shown provides a method for preparing granular extruded sterile mouse feed, specifically including the following steps:

[0077] (1) Pretreatment of excipients: 3.5 parts of minerals, 1 part of vitamins, 0.3 parts of methionine, 0.25 parts of choline chloride, 0.4 parts of lecithin and 0.5 parts of fructooligosaccharides are mixed to form a nutrient material, and a filling slurry is prepared for use; the minerals are composed of ferrous sulfate, potassium iodide and sodium selenite in a mass ratio of 5:2:2; the vitamins are composed of vitamin C, vitamin E, vitamin B2, vitamin B6 and vitamin D in a mass ratio of 20:8:5:3:2;

[0078] (2) Pretreatment of main ingredients: 23 parts of crushed casein, 38.85 parts of corn starch, 18.2 parts of wheat starch, 5 parts of microcrystalline cellulose, 5 parts of sucrose and 4 parts of soybean oil are added to the mixing mechanism 200 and mixed evenly. Water is added and the mixture is conditioned at 30-35℃ to obtain the puffed main slurry for later use.

[0079] (3) Extrusion puffing molding: Open the solenoid valve at the bottom of the mixing mechanism 200, add the puffed main slurry after conditioning in step (2) into the puffing machine 300 for extrusion and puffing, and obtain a continuously extruded hollow tubular puffed product.

[0080] (4) Injecting filler slurry: The puffed product formed in step (3) is fed into the slurry injection mechanism 500 while it is still hot, and the filler slurry obtained in step (1) is injected into the puffed product one by one using an injection mechanism 560 with several annular interval steps.

[0081] (5) Extrusion cutting and molding: The strip-shaped puffed product completed in step (4) is sent into the segment cutting mechanism 600 and cut into puffed particles of equal length. The two ends of the puffed particles are extruded and bonded to form a sealed shape, and then cooled and molded.

[0082] (6) Oxidation and detoxification treatment: The cut and segmented puffed particles are sent one by one into the ultraviolet disinfection unit 700. Under the irradiation of the UV-C ultraviolet lamp array, the endotoxins on the puffed particles are completely oxidized.

[0083] (7) Drying and packaging: Place the expanded granules after oxidation treatment in step (6) in an oven at 45-50℃ to dry and package them.

[0084] In step (3), the feeding speed of the front feed port of the extruder 300 is 35-40Hz, the cutting speed is 20-25Hz, the screw speed is 120-150rpm, and the temperature of the extrusion chamber is 110-115℃.

[0085] This preparation device ensures nutritional balance in extruded feed and increases calcium content by adding casein, corn starch, wheat starch, microcrystalline cellulose, sucrose, and soybean oil, thus guaranteeing efficient growth in mice. A slurry filling mechanism sequentially fills the extruded feed with a nutrient-rich slurry composed of minerals, vitamins, methionine, choline chloride, lecithin, and fructooligosaccharides. A segmented cutting mechanism cuts and presses the strip-shaped extruded product to prevent nutrient loss. The segmented extruded particles are then individually fed into an ultraviolet sterilization unit, where UV-C ultraviolet lamps completely oxidize endotoxins on the particles, completing the sterilization process.

[0086] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model should be covered within the scope of this utility model.

Claims

1. A low-endotoxin extruded aseptic rat feed production device, characterized in that, It includes a support frame (100), a mixing mechanism (200), an extruder (300), a cabinet (400), a grouting mechanism (500), a segmented cutting mechanism (600), and an ultraviolet disinfection mechanism (700), wherein: The puffing machine (300) is horizontally mounted on the support frame (100), and the mixing mechanism (200) is fixedly mounted at the front end of the puffing machine (300), and the discharge port (203) at the bottom of the mixing mechanism (200) is directly opposite the feed port at the front end of the puffing machine (300). The cabinet (400) is located downstream of the support frame (100), and the grouting mechanism (500), the segmented cutting mechanism (600) and the ultraviolet disinfection mechanism (700) are installed on it; the feeding end of the grouting mechanism (500) is connected to the extruder (300) through the feeding channel (501), and the discharging end is connected to the ultraviolet disinfection mechanism (700) through the discharging channel (503) via the segmented cutting mechanism (600).

2. The low-endotoxin extruded aseptic rat feed production device according to claim 1, characterized in that, The mixing mechanism (200) is located at the input end of the extruder (300), with a stirring paddle (201) at its axial center, a discharge port (203) at an eccentric position at its bottom, and a heating jacket (204) on its outer periphery. The lower end of the stirring paddle (201) is connected to the stirring motor (202); the discharge port (203) is a square round hole, which is directly opposite the feed port of the extruder (300); and the upper and lower ends of the heating jacket (204) are respectively provided with a water inlet (205) and a water outlet (206) arranged diagonally.

3. The low-endotoxin extruded sterile rat feed production device according to claim 1, characterized in that, The extruder (300) is a twin-screw extruder, which is fixedly installed on the support frame (100), and the input end of the extrusion screw (301) is connected to the extrusion motor (302) through the coupling (303).

4. The low-endotoxin extruded aseptic rat feed production device according to claim 1, characterized in that, The grouting mechanism (500) includes an annular groove (510), an annular guide assembly (520), a rotating disk (530), a hollow rotating shaft (540), a grouting motor (550), and several grouting needles (560), wherein: The annular groove (510) has an opening at the top, a support column (511) is vertically arranged at the center of the middle axis, and an arc-shaped grouting channel (502) is arranged at the bottom near the outer periphery. The front and rear ends of the grouting channel (502) are respectively connected to the feed channel (501) and the discharge channel (503).

5. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 4, characterized in that, The annular guide assembly (520) includes an inner annular guide rail (522) and an outer annular guide rail (523) arranged coaxially. The inner annular guide rail (522) and the outer annular guide rail (523) are respectively provided with a high guide groove (524) and a low guide groove (525) of different heights and connected end to end along their circumference. The rotating disk (530) has a disc-shaped structure with a welding hole (531) in the middle and several needle mounting holes (532) arranged in a ring at equal intervals on the outer periphery. The welding hole (531) in the middle is fixedly connected to the top of the hollow rotating shaft (540).

6. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 5, characterized in that, The upper and lower ends of the hollow rotating shaft (540) are rotatably mounted on the support column (511) through bearings, and the driven gear (541) located at the bottom of the left housing (401) meshes with the driving gear (551) on the output shaft of the grouting motor (550). A plurality of the grouting needles (560) are limited and installed in the corresponding needle mounting holes (532), and the guide block (561) in the middle is movably embedded in the corresponding high guide groove (524) or low guide groove (525), and the top is provided with a horizontally arranged grout output pipe (563).

7. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 6, characterized in that, A cylindrical slurry distribution component (512) is fixedly installed at the top of the support column (511). The outer wall of the slurry distribution component (512) is provided with a number of first distribution holes communicating with its inner cavity at the position corresponding to the position of the low guide groove (525). The top end of the slurry distribution component (512) is provided with a slurry input pipe (513) that is sealed and connected to its inner cavity, and a rotatable and sealed slurry distribution ring (514) is provided on the outer side. The slurry distribution ring (514) has several second distribution holes that are equidistantly opened on its circumference to connect to the slurry output pipe (563).

8. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 7, characterized in that, The low-position guide groove (525) is located in the middle of the grouting channel (502), and its arc length is at least four times the length of the grouting needle (560) station. Only the grouting needle (560) located in the low-position guide groove (525) is connected to the inner cavity of the grouting distribution component (512) through the grouting output pipe (563) and the grouting distribution ring (514) to form a grouting passage.

9. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 5, characterized in that, The grouting mechanism (500) further includes a first conveying roller assembly (504) and a second conveying roller assembly (505) respectively disposed at the positions of the feed channel (501) and the discharge channel (503), wherein: The first conveyor roller assembly (504) and the second conveyor roller assembly (505) are both active conveyor rollers driven by servo motors; and a conveyor belt extending to the ultraviolet disinfection mechanism (700) is provided on the discharge channel (503) downstream of the segmented cutting mechanism (600).

10. The low-endotoxin extruded aseptic rat feed production apparatus according to claim 5, characterized in that, The ultraviolet disinfection mechanism (700) includes a barrel (701), a central sleeve (702), a first UV-C ultraviolet lamp array (703), a spiral conveying channel (704), and a second UV-C ultraviolet lamp array (705), wherein: The upper end of the barrel (701) is provided with a feeding slide (706) that connects to the discharge channel (503), the lower end is provided with a discharge slide (707), and the top of the barrel is detachably provided with a barrel cover (708). The central sleeve (702) and the spiral conveying channel (704) are both made of transparent glass and are coaxially located at the center of the barrel (701), and the first UV-C ultraviolet lamp array (703) is installed inside them. The spiral conveying channel (704) is spirally arranged on the inner wall of the barrel (701), and its upper and lower ends are respectively connected to the feed slide (706) and the discharge slide (707), and a second UV-C ultraviolet lamp array (705) is arranged at its bottom along its length.

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