Pig feed based on multistage conditioning low-temperature granulation technology and preparation method thereof

Abstract

The invention discloses a pig feed based on a multi-stage conditioning low-temperature granulation technology, which is prepared from the following materials in parts by weight: 37.46 parts of corn, 37.46 parts of corn flour, 37.46 parts of corn flour and 37.46 parts of corn flour. According to the present invention, the structure is scientific and reasonable, the use is safe and convenient, various nutrition materials are mixed so as to comprehensively increase the nutrition components in the feed, such that the nutrition components in the feed can be completely increased, the production cost can be reduced, the production efficiency can be improved, the production cost can be reduced, the production cost can be reduced, the production cost can be reduced, and the production cost can be reduced. Meanwhile, whey powder and Meiba are utilized to reduce the occurrence of intestinal diseases of the piglets and improve the liver detoxification function of the piglets, in addition, antioxidant is utilized to improve the mildew-proof effect of the feed and prolong the shelf life, and coconut oil powder is coated to improve the bonding effect between the materials, so that the feed has the effects of improving the immunity of the piglets and improving the immunity of the piglets. Meanwhile, the feed dust is reduced by utilizing third-grade soybean oil.

Description

Technical Field

[0001] The present invention relates to the technical field of pig feed preparation, in particular to a pig feed based on a multi-stage conditioning and low-temperature granulation technology and a preparation method thereof. Background Art

[0002] With the improvement of consumers' living standards and the adjustment of dietary structure, people are paying more and more attention to the nutritional content and cholesterol content of food. Pork is a kind of meat that people often eat. Its lean meat rate and fat content have become factors people consider when choosing to buy pork. In order to meet market demand, pig producers use various means to increase the growth rate of pigs. During the production of pig feed, the raw materials need to be processed, mixed and tempered before pelleting.

[0003] However, in the production process of existing pig feed, the basic raw materials cannot be conveniently measured, which reduces the mixing ratio of the basic raw materials and affects the preparation of subsequent feed. At the same time, the raw materials cannot be mixed and tempered at high and low temperatures in multiple stages, resulting in the loss of nutrients in the heat-sensitive raw materials. Therefore, in order to avoid the above technical problems, it is necessary to provide a pig feed based on multi-stage tempering and low-temperature granulation technology and a preparation method thereof to overcome the above-mentioned defects in the prior art. Summary of the Invention

[0004] The present invention provides a pig feed based on multi-stage conditioning and low-temperature granulation technology and a preparation method thereof, which can effectively solve the problems proposed in the above-mentioned background technology, such as the inability to conveniently measure the basic raw materials, reducing the proportion and mixing of the basic raw materials, affecting the preparation of subsequent feeds, and the inability to perform high-temperature and low-temperature multi-stage mixing and conditioning on the raw materials, resulting in the loss of nutrients in the heat-sensitive raw materials.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology, comprising the following steps:

[0006] S1. Feed the basic raw materials into the filter cylinder through the feed channel. Multi-stage filtration is carried out with the help of the screening motor, rotating rod, material plate and screen to achieve the classification and discharge of full raw materials, unfull raw materials and debris;

[0007] S2, using the rotating motor to drive the load-bearing rod, lifting crawler and lifting box, lift the full raw materials to the crushing box for crushing, and discharge them into the storage box for standby;

[0008] S3, delivering the basic raw materials into the metering cylinder through the delivery auger and the delivery pipe;

[0009] S4, the electromagnet and the magnetic ring cooperate to push the pull rod, the top baffle, the top rod, and the bottom baffle to move in opposite directions, and the measured raw materials are sent into the mixing drum;

[0010] S5. Start the stirring motor and simultaneously introduce steam through the air inlet pipe and discharge it into the mixing drum through the vent pipe to complete the aging process.

[0011] S6, the matured raw materials fall into the cooling horizontal pipe for cooling, while the core materials are added through the filling hopper. After mixing, they enter the tempering horizontal pipe and are tempered at low temperature by the heat of the gas in the heat exchange pipe;

[0012] S7. The tempered mixture enters the granulation extruder, and is driven by the driving motor to be extruded by the rotating mesh cylinder and the extrusion wheel, and is cut by the scraper to complete the pig feed granulation.

[0013] Preferably, a pig feed based on multi-stage conditioning and low-temperature granulation technology is provided, wherein the pig feed is composed of the following materials by weight: 37-38 parts of corn, 14.50-15.50 parts of broken rice, 2-2.50 parts of rice bran meal, 1.80-2.20 parts of third-grade soybean oil, 2-3 parts of coated coconut oil powder, 4-5 parts of rice protein powder, 5.50-6.50 parts of 46% soybean meal, 2.50-3.50 parts of puffed soybeans, 4.50-5.50 parts of fermented soybean meal, 1-2 parts of soybean milk, 1.50-2.50 parts of imported fish meal, 7-8 parts of whey powder, 2-3 parts of white sugar, 2-3 parts of glucose, 0.90-0.94 parts of lysine hydrochloride 98%, 0.20-0.24 parts of DL-methionine 99%, 0.35-0.39 parts of threonine 98%, 0.10-0.14 parts of tryptophan 98%, 0.5 0-0.90 parts, calcium formate 0.80-1.20 parts, sodium chloride 0.20-0.40 parts, peptide iron 0.01-0.03 parts, zinc oxide 0.10-0.30 parts, Yingtai No. 2 0.05-0.07 parts, muscle source 0.05-0.07 parts, Feipu sweet 0.02-0.04 parts, Feipu fragrance 0.08-0.12 parts, mold 0.04-0.06 parts, antioxidant 0.04- 0.06 parts, citric acid monohydrate 0.40-0.60 parts, orotic acid 0.40-0.60 parts, tributyrin 0.08-0.12 parts, choline chloride 50% 0.04-0.06 parts, suckling pig compound multivitamin 0.03-0.05 parts, 0.2% compound micro-minerals 0.15-0.25 parts, resource montmorillonite 0.20-0.30 parts, HB8020 core material 0.45-0.55 parts.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0015] 1. By mixing various materials such as rice protein powder, puffed soybeans, 46% soybean meal, soy milk, imported fish meal, white sugar, glucose, 98% lysine hydrochloride, 99% DL-methionine, 98% threonine, 98% tryptophan, fermented soybean meal, monocalcium phosphate, calcium formate, sodium chloride, peptide iron, zinc oxide, Yingtai No. 2, muscle source, Feipu sweet, Feipu fragrance, citric acid monohydrate, orotic acid, orotic acid, tributyrin, 50% choline chloride, suckling pig compound multivitamin, 0.2% compound micro-minerals, resource montmorillonite and HB8020 core material, the nutritional content of the feed is comprehensively increased, which is conducive to the gastrointestinal absorption of piglets and promotes the growth effect of suckling piglets. At the same time, whey powder and mold blocker are used to reduce the incidence of intestinal diseases in piglets and increase the detoxification function of the piglet's liver. In addition, antioxidants are used to improve the anti-mildew effect of the feed and increase the shelf life. The coating of coconut oil powder increases the bonding effect between materials. At the same time, third-grade soybean oil is used to reduce feed dust.

[0016] 2. A metering feeding mechanism is provided. The basic raw materials are fed into the dosing pipe inside the metering cylinder through the cooperation of the conveying auger, the conveying pipe and the connecting cylinder. As the basic raw materials inside the dosing pipe increase, the weight increases, pushing the dosing pipe and the floating plate down, pushing the liquid inside the metering cylinder into the liquid level pipe through the connecting pipe, forcing the liquid to push the liquid level plate up, making it convenient to convert volume into weight and display the amount of basic raw materials inside the dosing pipe. At the same time, the liquid level plate is brought into contact with the touch switch, energizing the two electromagnets, generating repulsion with the magnetic ring, pushing the pull rod and the top baffle up, sealing the connecting cylinder, preventing feeding, pushing the top rod and the bottom baffle down, releasing the seal of the dosing pipe, and facilitating the discharge of the measured basic raw materials into the mixing cylinder. In the process of conveying the basic raw materials, the raw materials are automatically proportioned and metered, increasing the convenience of feed preparation.

[0017] In addition, when the basic raw materials measured inside the dosing pipe are discharged, the support spring pushes the float plate and the dosing pipe to rise and reset, and the tensioning spring pulls the liquid level plate down and reset. At the same time, the liquid level plate drives the pressure plate down through the lifting rod and contacts another touch switch, changing the current direction of the two electromagnets, causing the electromagnets to adsorb the magnetic ring, drive the pull rod and the top baffle to descend, release the seal on the connecting tube, drive the top rod and the bottom baffle to rise, and re-seal the dosing pipe to facilitate subsequent metering. In addition, the touch switch is pushed to the height of the liquid level pipe by the electric telescopic rod, and the weight of the measured basic raw materials can be adjusted as needed, which increases applicability.

[0018] 3. A multi-stage mixing and tempering mechanism is provided. The stirring motor drives the stirring tube and stirring blades to rotate through the connecting rod to stir and mix the basic raw materials. Steam is sent into the steam cylinder through the air inlet pipe, so that steam accumulates inside the steam cylinder and the stirring tube, pushing the push plate and the traction rod to slide down. The sealing ball is pulled by the traction rope to move, releasing the seal of the vent pipe, making it easier for steam to enter the mixing cylinder through the vent pipe and mix evenly with the basic raw materials. The basic raw materials are mixed and matured, thereby improving the maturation efficiency. After the steam in the steam cylinder and the stirring tube is discharged, the air pressure is restored, and the push plate and the traction rod are pushed back to their original position by the reset spring. The elastic rope's contraction characteristic is used to pull the sealing ball back to its original position and fit the retaining ring, thereby resealing the vent pipe. This cycle is repeated, and the basic raw materials in the mixing cylinder are continuously and intermittently matured.

[0019] Through the cooperation of the driving motor, the rotating rod and the spiral conveyor plate, the basic raw materials are moved along the cooling transverse tube. At the same time, the fan inside the air inlet tube is used to send air into the heat exchange air pipe, so that the heat exchange air pipe passes through the insulation pipe outside the cooling transverse tube, and the basic raw materials inside the cooling transverse tube are heat exchanged and cooled to reduce the temperature of the basic raw materials. At the same time, the core material with a good ratio is added to the cooling transverse tube through the filling hopper to mix the core material with the basic raw materials. When the core material and the basic raw materials enter the tempering transverse tube, the heat after heat exchange is brought into the insulation pipe outside the tempering transverse tube by the heat exchange air pipe, and the core material and basic raw materials inside the tempering transverse tube are heated at a low temperature, and tempered and mixed again, realizing high temperature and bottom multi-stage mixed tempering, which is convenient for the classification and processing of heat-resistant and heat-sensitive raw materials and reduces the loss of nutrition.

[0020] 4. A feeding and screening mechanism is set up. The screening motor drives the rotating rod and the material-dividing plate to rotate, and the basic raw materials falling on the screen are diverted, screened and filtered. Through the cooperation of the two screens, the basic raw materials are divided into three layers: full, dry and debris. The full raw materials, dry raw materials and debris are discharged one by one, which makes it convenient to transport the full raw materials to the inside of the lifting box while discharging and recycling the dry raw materials, reducing the waste of resources. In addition, the magnetic plate inside the material-guiding table absorbs and magnetically separates the iron chips in the basic raw materials to prevent the iron chips from accumulating inside the basic raw materials, providing convenience for subsequent crushing.

[0021] Through the cooperation of the rotating motor, load-bearing rod, lifting shoe and lifting box, the full basic raw materials inside the lifting box are dug out and lifted, thereby increasing the height of the basic raw materials, and then discharged into the crushing box through the discharge channel. The rotating motor drives the crushing roller to rotate by utilizing the cooperation of the transmission wheel and the belt. At the same time, the two crushing rollers rotate relative to each other through the cooperation of the transmission gear, and the basic raw materials are squeezed and crushed, providing convenience for subsequent mixing. The crushed basic raw materials fall into the storage box and are driven by another transmission wheel and belt to rotate the conveying auger, which facilitates the subsequent transportation of the basic raw material powder and increases convenience.

[0022] In summary, through the cooperation of the feeding and screening mechanism, the metering feeding mechanism and the multi-stage mixing and tempering mechanism, the feed raw materials are processed in an integrated manner during transportation. While ensuring the quality of the raw materials, the raw materials are metered automatically to ensure the effect of subsequent mixing and preparation. In the process of mixing, the raw materials are subjected to high-temperature and low-temperature multi-stage tempering, so that the heat-resistant and heat-sensitive raw materials can be processed separately, reducing nutrient loss and ensuring the quality of subsequent production and preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a flow chart of the method for preparing pig feed of the present invention;

[0025] Figure 2 Schematic diagram of the installation structure of the mixing drum of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the metering feeding mechanism of the present invention;

[0027] Figure 4 Schematic diagram of the installation structure of the liquid level plate of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the multi-stage mixing and tempering mechanism of the present invention;

[0029] Figure 6 This is a schematic diagram of the installation structure of the sealing ball of the present invention;

[0030] Figure 7 Schematic diagram of the installation structure of the belt of the present invention;

[0031] Figure 8 It is a structural diagram of the feeding and screening mechanism of the present invention;

[0032] Figure 9 This is a schematic diagram of the installation structure of the discharge channel of the present invention;

[0033] Numbers in the figure: 1, mixing bracket; 2, mixing cylinder;

[0034] 3. Metering feed mechanism; 301. Metering cylinder; 302. Connecting cylinder; 303. Conveying pipe; 304. Storage box; 305. Conveying auger; 306. Pull rod; 307. Top baffle; 308. Support spring; 309. Floating plate; 310. Dispensing pipe; 311. Discharging pipe; 312. Fixing ring; 313. Vertical rod; 314. Limiting pad; 315. Ejector rod; 316. Bottom baffle; 317. Electromagnet; 318. Magnetic ring; 319. Connecting pipe; 320. Liquid level pipe; 321. Lifting rod; 322. Liquid level plate; 323. Electric telescopic rod; 324. Support plate; 325. Touch switch; 326. Tension spring;

[0035] 4. Multi-stage mixing and tempering mechanism; 401. Steam cylinder; 402. Air inlet pipe; 403. Stirring motor; 404. Connecting rod; 405. Stirring pipe; 406. Positioning block; 407. Drawbar; 408. Ventilation pipe; 409. Filter; 410. Elastic rope; 411. Sealing ball; 412. Retaining ring; 413. Drawbar; 414. Push plate; 415. Discharge pipe; 416. Cooling cross pipe; 417. Tempering cross pipe; 418. Granulating extruder; 419. Driving motor; 420. Rotating mesh cylinder; 421. Scraper; 422. Extrusion wheel; 423. Rotating rod; 424. Screw conveyor plate; 425. Insulation pipe; 426. Air inlet pipe; 427. Fan; 428. Heat exchange pipe; 429. Filling hopper; 430. Return spring;

[0036] 5. Feeding and screening mechanism; 501. Support frame; 502. Lifting box; 503. Material guide channel; 504. Filter cartridge; 505. Feed channel; 506. Screening motor; 507. Rotating rod; 508. Screen; 509. Material shifting plate; 510. Material guide table; 511. Magnetic plate; 512. Discharge channel; 513. Load-bearing rod; 514. Lifting track; 515. Lifting box; 516. Discharge channel; 517. Crushing box; 518. Crushing roller; 519. Transmission gear; 520. Transmission wheel; 521. Belt; 522. Rotating motor. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] Example: Figure 1 As shown, the present invention provides a technical solution, a method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology, comprising the following steps:

[0039] S1. The base raw material is fed into the filter cylinder 504 through the feed channel 505. The base raw material is subjected to multi-stage filtration by the screening motor 506, the rotating rod 507, the material-dispensing plate 509 and the screen 508. The full raw material, the unfull raw material and the debris are separated and discharged;

[0040] S2. The rotating motor 522 is used to drive the load-bearing rod 513, the lifting crawler 514 and the lifting box 515 to rotate inside the lifting box 502, lifting the full basic raw material and sending it to the crushing box 517. The crushing box 517 crushes the full basic raw material into powder and discharges it into the storage box 304 for standby use.

[0041] S3. The conveying auger 305 and the conveying pipe 303 are used to deliver the base raw material into the metering cylinder 301, causing the base raw material to accumulate inside the metering cylinder 301, pushing the floating plate 309 and the batching pipe 310 downward, thereby delivering the liquid into the liquid level pipe 320, thereby facilitating the conversion of the weight of the base raw material into the rising distance of the liquid level plate 322;

[0042] S4. Then, the electromagnet 317 and the magnetic ring 318 cooperate to push the pull rod 306 and the top baffle 307 to move according to the weight of the base material inside the metering cylinder 301, and simultaneously push the top rod 315 and the bottom baffle 316 to move in the opposite direction, so as to deliver the measured base material into the mixing cylinder 2;

[0043] S5. Start the stirring motor 403 to rotate the connecting rod 404, the stirring tube 405, and the stirring blades to mix the base raw materials. At the same time, steam is sent into the steam cylinder 401 and the stirring tube 405 through the air inlet pipe 402, and discharged into the mixing cylinder 2 through the vent pipe 408 to mix and mature the base raw materials.

[0044] S6. The matured base raw materials fall into the cooling horizontal pipe 416 for conveying and cooling. A metered amount of core material is added to the cooling horizontal pipe 416 using the filling hopper 429. The core material and base raw materials are mixed and then enter the tempering horizontal pipe 417. The heat absorbed by the gas in the heat exchange pipe 428 heats and tempers the core material and base raw materials passing through the tempering horizontal pipe 417.

[0045] S7, the tempered and mixed core material and basic raw material enter the granulation extruder 418, and the rotating mesh drum 420 is driven by the driving motor 419 to rotate. Then, the tempered and mixed core material and basic raw material are extruded by the extrusion wheel 422 and cut off by the scraper 421 to complete the granulation of the pig feed.

[0046] like Figure 2-9As shown, the inner wall of the mixing bracket 1 is clamped with a mixing drum 2, and a metering feeding mechanism 3 is provided on the top of the mixing drum 2. The metering feeding mechanism 3 includes a metering drum 301, a connecting drum 302, a conveying pipe 303, a storage box 304, a conveying auger 305, a pull rod 306, a top baffle 307, a support spring 308, a floating plate 309, a dispensing pipe 310, a discharge pipe 311, a fixing ring 312, a vertical rod 313, a limiting pad 314, a top rod 315, a bottom baffle 316, an electromagnet 317, a magnetic ring 318, a connecting pipe 319, a liquid level pipe 320, a lifting rod 321, a liquid level plate 322, an electric telescopic rod 323, a supporting plate 324, a touch switch 325 and a tensioning spring 326;

[0047] The top of the mixing cylinder 2 is symmetrically connected to the metering cylinder 301, and the tops of the two metering cylinders 301 are fixedly connected to the connecting cylinder 302. The opposite ends of the two connecting cylinders 302 are both connected to the delivery pipe 303. The other end of the delivery pipe 303 is fixedly connected to the storage box 304, and the inner wall of the storage box 304 corresponds to the internal position of the delivery pipe 303 and is rotatably connected to the delivery auger 305. The top of the connecting cylinder 302 is symmetrically connected to the pull rod 306, and the bottom end of the pull rod 306 corresponds to the bottom position of the connecting cylinder 302. The top baffle 307 is fixedly connected to the bottom of the connecting cylinder 302, and the supporting spring 308 is fixedly connected to the top of the supporting spring 308. The floating plate 309 is fixedly connected to the top of the supporting spring 308. The inner wall of the floating plate 309 is connected to the inner side of the supporting spring 308. The feeding pipe 310 is clamped at the bottom of the metering cylinder 301 and the top of the mixing cylinder 2. The outer side of the feeding pipe 310 is fixedly connected to the inner position of the feeding pipe 311. The fixing ring 312 is fixed at the bottom of the fixing ring 312. The vertical rod 313 is clamped, and the bottom ends of the two vertical rods 313 are clamped with the limiting pad 314. The inner wall of the limiting pad 314 is movably connected with the push rod 315. The top of the push rod 315 is fixedly connected to the bottom baffle 316 at the position corresponding to the bottom of the batching pipe 310. The top of the connecting cylinder 302 and the bottom end of the limiting pad 314 are fixedly connected with the electromagnet 317 by bolts. The outer side of the pull rod 306 and the outer side of the push rod 315 are fixedly sleeved with a magnetic ring 318. In order to facilitate the proportioning of raw materials, the metering cylinder The interior of 301 is filled with liquid at a position corresponding to the bottom of the floating plate 309. A guide plate is clamped on the top of the dispensing pipe 310, and the outer sides of the guide plate and the outer sides of the floating plate 309 are both slidably connected to the inner wall of the metering cylinder 301. The bottom end of the dispensing pipe 310 passes through the bottom end of the metering cylinder 301. The outer side of the dispensing pipe 310 is slidably connected to the inner wall of the bottom end of the metering cylinder 301, and a sealing ring is sleeved between the outer side of the dispensing pipe 310 and the metering cylinder 301. The top end of the top baffle 307 and the top end of the bottom baffle 316 are both arc-shaped plates.

[0048] A connecting pipe 319 is fixedly connected to the bottom position of the outer side of the metering cylinder 301. The other end of the connecting pipe 319 is fixedly connected to a liquid level pipe 320 at the top position corresponding to the mixing cylinder 2. A lifting rod 321 is movably connected to the top of the liquid level pipe 320. A liquid level plate 322 is fixedly connected to the bottom end of the lifting rod 321 at a position corresponding to the inside of the liquid level pipe 320 by bolts. Electric telescopic rods 323 are fixedly connected to the top of the liquid level pipe 320 at positions on both sides of the lifting rod 321 by bolts. A supporting plate 324 is clamped at the top of the liquid level pipe 320 at a position corresponding to the outer side of the lifting rod 321. The top of the support plate 324 and the bottom of the two electric telescopic rods 323 are both fixedly connected to a touch switch 325 via bolts. The bottom of the liquid level plate 322 is fixedly connected to a tension spring 326. To facilitate observation of the height of the liquid level plate 322, the liquid level tube 320 is made of an acrylic plate and has scale lines on the outside of the liquid level tube 320. The electromagnet 317, the electric telescopic rod 323, and the touch switch 325 are all powered by an external power supply, and the signal output end of the touch switch 325 is connected to the input end of the electromagnet 317. The top of the lifting rod 321 is fixedly connected to a pressure plate.

[0049] A multi-stage mixing and tempering mechanism 4 is provided at the bottom end of the mixing drum 2. The multi-stage mixing and tempering mechanism 4 includes a steam drum 401, an air inlet pipe 402, a stirring motor 403, a connecting rod 404, a stirring tube 405, a positioning block 406, a traction rod 407, a vent pipe 408, a filter screen 409, an elastic rope 410, a sealing ball 411, a retaining ring 412, a traction rope 413, a push plate 414, a discharge pipe 415, a cooling transverse pipe 416, a tempering transverse pipe 417, a granulation extrusion drum 418, a driving motor 419, a rotating mesh drum 420, a scraper 421, an extrusion wheel 422, a rotating rod 423, a spiral conveying plate 424, a heat preservation pipe 425, an air inlet drum 426, a fan 427, a heat exchange air pipe 428, a filling hopper 429 and a return spring 430.

[0050] A steam cylinder 401 is clamped on the top of the mixing cylinder 2, and an air inlet pipe 402 is fixedly connected to the outside of the steam cylinder 401. A stirring motor 403 is fixedly connected to the top of the steam cylinder 401 by bolts. A connecting rod 404 is equidistantly clamped on the bottom end of the output shaft of the stirring motor 403 at a position corresponding to the internal position of the steam cylinder 401. A stirring tube 405 is fixedly connected to the bottom end of the connecting rod 404 at a position corresponding to the internal position of the mixing cylinder 2. Positioning blocks 406 are equidistantly clamped on the inner wall of the stirring tube 405, and a traction rod 407 is slidably connected to the inner wall of the positioning block 406. Ventilation tubes 408 are spirally and equidistantly opened on the inner wall of the stirring tube 405. A filter screen 409 is clamped on the inner wall of the ventilation tube 408. An elastic rope 410 is fixedly connected to one end of the filter screen 409, and the other end of the elastic rope 410 corresponds to the internal position of the ventilation tube 408. A sealing ball 411 is fixedly connected to the vent pipe 408, a retaining ring 412 is clamped at a position on one side of the sealing ball 411 on the inner wall of the vent pipe 408, a traction rope 413 is fixedly connected to the outer side of the traction rod 407 at a position on one side of the vent pipe 408, the bottom end of the traction rod 407 is fixedly connected to a push plate 414 by a bolt, and the bottom end of the push plate 414 is fixedly connected to a return spring 430 by a bolt. In order to facilitate the delivery of steam into the mixing drum 2, stirring blades are equidistantly fixedly connected to the outside of the stirring tube 405, the other end of the traction rope 413 is fixedly connected to one end of the sealing ball 411, the outer side of the push plate 414 is in contact with the inner wall of the stirring tube 405, and an electric valve is installed on the inner wall of the discharge pipe 415. The stirring motor 403, the drive motor 419, the fan 427 and the electric valve are all powered by an external power supply;

[0051] The bottom end of the mixing cylinder 2 is fixedly connected to a discharge pipe 415, and the bottom end of the discharge pipe 415 is fixedly connected to a cooling cross pipe 416. One end of the cooling cross pipe 416 is clamped with a tempering cross pipe 417, and the other end of the tempering cross pipe 417 is fixedly connected to a granulating extrusion cylinder 418 by bolts. One end of the granulating extrusion cylinder 418 is fixedly connected to a driving motor 419 by bolts. A rotating rod 423 is clamped at a position inside the granulating extrusion cylinder 418 corresponding to the output shaft of the driving motor 419. The outer side of the rotating rod 423 is fixedly connected to a rotating net cylinder 420 at a position inside the granulating extrusion cylinder 418 by bolts, and a scraper 421 is fixedly connected to the outer side of the granulating extrusion cylinder 418 by bolts at equal intervals. The inner wall of the rotating net cylinder 420 is symmetrically connected to the extrusion wheel 422, and the rotating rod 423 is fixedly connected to the rotating net cylinder 420. A spiral conveying plate 424 is fixedly sleeved on the outside, and an insulation pipe 425 is fixedly sleeved on the outside of the cooling cross pipe 416 and the outside of the tempering cross pipe 417. One end of the insulation pipe 425 is fixedly connected to an air inlet tube 426, and a fan 427 is installed inside the air inlet tube 426. Heat exchange air pipes 428 are equidistantly connected to the inner wall of the air inlet tube 426 corresponding to the inner position of the insulation pipe 425. A filling hopper 429 is fixedly connected to the top of the cooling cross pipe 416. In order to slow down the loss of heat, one end of the scraper 421 is fitted with the outside of the rotating mesh cylinder 420. The bottom end of the granulation extrusion cylinder 418 is fixedly connected to the discharge port. The other end of the heat exchange air pipe 428 passes through the outside of the insulation pipe 425 on the tempering cross pipe 417. The cooling cross pipe 416 and the tempering cross pipe 417 are both made of heat-conducting plates.

[0052] Both ends of the mixing drum 2 are provided with a feeding and screening mechanism 5, which includes a support frame 501, a lifting box 502, a material guide channel 503, a filter drum 504, a feeding channel 505, a screening motor 506, a rotating rod 507, a screen 508, a material diverter plate 509, a material guide round table 510, a magnetic plate 511, a discharge channel 512, a load-bearing rod 513, a lifting crawler 514, a material lifting box 515, a material discharge channel 516, a crushing box 517, a crushing roller 518, a transmission gear 519, a transmission wheel 520, a belt 521 and a rotating motor 522;

[0053] The bottom ends of the two storage boxes 304 are fixedly connected to the support frame 501, and one end of the two support frames 501 is fixedly connected to the lifting box 502. The bottom position of one end of the lifting box 502 is clamped with a material guide channel 503, and the other end of the material guide channel 503 is fixedly connected to the filter cartridge 504. The top of the filter cartridge 504 is fixedly connected to the feed channel 505. The bottom end of the filter cartridge 504 is fixedly connected to the screening motor 506 by bolts. The output shaft of the screening motor 506 corresponds to the fixed connection inside the filter cartridge 504. A rotating rod 507 is connected, and a screen 508 is equidistantly connected to the outside of the filter cartridge 504 at a position corresponding to the outside of the rotating rod 507. A material stripping plate 509 is equidistantly connected to the top of the screen 508 and the inside of the filter cartridge 504. A material guide round table 510 is fixedly connected to the outside of the rotating rod 507 at a position corresponding to the inside of the feed channel 505. A magnetic plate 511 is fixedly connected to the inner wall of the material guide round table 510 by bolts. A material discharge channel 512 is symmetrically connected to the outside of the filter cartridge 504.

[0054] The top and bottom positions of the inner wall of the lifting box 502 are rotatably connected with load-bearing rods 513, and the outer sides of the two load-bearing rods 513 corresponding to the inner positions of the lifting box 502 are sleeved with lifting crawlers 514, and the outer sides of the lifting crawlers 514 are equidistantly connected with lifting boxes 515. The top position of the other end of the lifting box 502 is clamped with a discharge channel 516, and the top of the storage box 304 is clamped with a crushing box 517 at the bottom position of the discharge channel 516. The inner wall of the crushing box 517 is symmetrically connected with crushing rollers 518. One end of the rotating shaft of the two crushing rollers 518 is clamped with a transmission gear 519 at a position corresponding to one side of the crushing box 517. The outer side of the crushing roller 518 rotating shaft, the outer side of a load-bearing rod 513 and the outer side of the conveying auger 305 rotating shaft corresponding to the other side of the crushing box 517 are sleeved with a transmission wheel 520. The transmission wheel 520 on the rotating shaft of a crushing roller 518 and the transmission wheel 520 on the rotating shaft of the conveying auger 305 0 are sleeved with belts 521 on the outside, and the outer sides of the transmission wheel 520 on the rotating shaft of the other crushing roller 518 and the transmission wheel 520 on the load-bearing rod 513 are sleeved with belts 521. The top of one end of the lifting box 502 is fixedly connected to the position of one side of the load-bearing rod 513 by bolts to a rotating motor 522. In order to facilitate the transportation and screening of raw materials, one discharge channel 512 is correspondingly installed on the outside of one screen 508, and the other discharge channel 512 is correspondingly installed on the outside of the other screen 508. A slag discharge port is provided at the bottom end of the filter drum 504. The tops of the two screens 508 and the bottom ends of the inner parts of the filter drum 504 are all inclined. The bottom ends of the three sets of material stripping plates 509 are respectively fitted with the top ends of the screens 508 and the bottom ends of the inner parts of the filter drum 504. One end of the output shaft of the rotating motor 522 is fixedly connected to one end of the load-bearing rod 513. The rotating motor 522 and the screening motor 506 are both powered by an external power supply.

[0055] According to the above description, it also includes a pig feed based on multi-stage conditioning and low-temperature granulation technology, which is composed of the following materials by weight: 37.46 parts of corn, 15 parts of broken rice, 2.20 parts of rice bran meal, 2 parts of third-grade soybean oil, 2.50 parts of coated coconut oil powder, 4.50 parts of rice protein powder, 6 parts of 46% soybean meal, 3 parts of puffed soybeans, 5 parts of fermented soybean meal, 1.50 parts of soy milk, 2 parts of imported fish meal, 7.50 parts of whey powder, 2.50 parts of white sugar, 2.50 parts of glucose, 0.92 parts of 98% lysine hydrochloride, 0.22 parts of 99% DL-methionine, 0.37 parts of 98% threonine, 0.12 parts of tryptophan 98%, 0.70 parts of calcium dihydrogen phosphate, 1 part of calcium formate, 0.30 parts of sodium chloride, 0.02 parts of peptide iron, 0.20 parts of zinc oxide, 0.06 parts of Yingtai No. 2, 0.06 parts of muscle source, 0.03 parts of Feipu sweet, 0.10 parts of Feipu fragrance, 0.05 parts of mold, 0.05 parts of antioxidant, 0.50 parts of citric acid monohydrate, 0.50 parts of orotic acid, 0.10 parts of tributyrin, 0.05 parts of choline chloride 50%, 0.04 parts of suckling pig compound multivitamin, 0.20 parts of 0.2% compound micro-minerals, 0.25 parts of resource montmorillonite, and 0.50 parts of HB8020 core material.

[0056] The working principle and use process of the present invention are as follows: first, the basic raw materials of pig feed are fed into the interior of the filter cylinder 504 through the feed channel 505, and the screening motor 506 is started at the same time, so that the screening motor 506 drives the rotating rod 507 and the material-dividing plate 509 to rotate, forcing the material-dividing plate 509 to screen and filter the basic raw materials that fall onto the screen 508, and screen out the dry, unfull and debris, and then pass through the second screen 508 for secondary filtration, so that the debris falls, while the dry and unfull raw materials are preserved, and then the material-dividing plate 509 and the screen 508 cooperate to filter the basic raw materials. The full basic raw materials, the dry and unfull basic raw materials are conveniently discharged through different discharge channels 512, thereby ensuring the screening and transportation of the basic raw materials. At the same time, the dry and unfull basic raw materials can be recycled to reduce the waste of resources, and the debris is discharged through the slag discharge port at the bottom end of the filter cylinder 504. In addition, when the basic raw materials enter the feed channel 505, the iron chips in the basic raw materials are adsorbed and magnetically separated by the magnetic plate 511 inside the material guide truncated table 510, forcing the iron chips to be fixed on the material guide truncated table 510, thereby preventing the iron chips from accumulating inside the basic raw materials and providing convenience for subsequent crushing.

[0057] Then, the full basic raw materials that have been screened are sent into the lifting box 502 through the guide channel 503, and then the rotating motor 522 drives the load-bearing rod 513 and the lifting crawler 514 to rotate, forcing the lifting crawler 514 to carry the lifting box 515 to dig and lift the full basic raw materials inside the lifting box 502, thereby increasing the height of the basic raw materials. Subsequently, the basic raw materials are discharged into the crushing box 517 through the discharge channel 516. At the same time, the driving wheel 520 and the belt 521 cooperate to transmit power, so that the rotating motor 522 drives the crushing roller 518 to rotate, and the transmission gear 519 cooperates to make the two crushing rollers 518 rotate relative to each other, thereby squeezing and crushing the basic raw materials, providing convenience for subsequent mixing, and the crushed basic raw materials fall into the storage box 304. At the same time, another driving wheel 520 and the belt 521 cooperate to drive the conveying auger 305 to rotate, which is convenient for the subsequent conveying of basic raw material powder.

[0058] Next, the basic raw material inside the storage box 304 enters the connecting cylinder 302 through the cooperation of the conveying auger 305 and the conveying pipe 303, and falls into the dispensing pipe 310 inside the metering cylinder 301 through the connecting cylinder 302. As the basic raw material inside the dispensing pipe 310 increases, the weight increases, pushing the dispensing pipe 310 and the floating plate 309 down, pushing the liquid inside the metering cylinder 301 into the liquid level pipe 320 through the connecting pipe 319, forcing the liquid to push the liquid level plate 322 up, making it convenient to convert volume into weight and display the amount of basic raw material inside the dispensing pipe 310. When the basic raw material inside the dispensing pipe 310 reaches the required amount, the liquid also pushes the liquid level plate 322 up and contacts the touch switch 325. The electromagnet 317 at the top of the connecting cylinder 302 is powered, so that the electromagnet 317 and the magnetic ring 318 at the top of the connecting cylinder 302 repel each other, pushing the pull rod 306 upward, forcing the pull rod 306 to drive the top baffle 307 to seal with the connecting cylinder 302, thereby preventing the feeding of materials. At the same time, the electromagnet 317 at the bottom of the limiting pad 314 is powered, so that the electromagnet 317 at the bottom of the limiting pad 314 repel the magnetic ring 318, pushing the top rod 315 and the bottom baffle 316 downward, releasing the seal of the dispensing pipe 310, and facilitating the discharge of the measured basic raw materials into the interior of the mixing cylinder 2. Furthermore, in the process of conveying the basic raw materials, the raw materials can be automatically proportioned and measured, providing convenience for subsequent preparation.

[0059] Then, when the basic raw material measured in the dispensing pipe 310 is discharged, it loses its weight, which facilitates the support spring 308 to push the floating plate 309 and the dispensing pipe 310 to rise and reset. The tension spring 326 pulls the liquid level plate 322 down and resets. At the same time, the liquid level plate 322 drives the pressure plate to descend through the lifting rod 321, and contacts another touch switch 325, changing the current direction of the two electromagnets 317, so that the electromagnet 317 attracts the magnetic ring 318, drives the pull rod 306 and the top baffle 307 to descend, releases the seal on the connecting tube 302, drives the top rod 315 and the bottom baffle 316 to rise, and reseals the dispensing pipe 310, facilitating subsequent metering and ensuring continuity. In addition, the electric telescopic rod 323 pushes the touch switch 325 to the height of the liquid level pipe 320, and the weight of the measured basic raw material is adjusted as needed, thereby increasing applicability.

[0060] Next, the stirring motor 403 is started, so that the stirring motor 403 drives the stirring tube 405 and the stirring blade to rotate through the connecting rod 404, stirring and mixing the basic raw materials inside the mixing drum 2. At the same time, steam is sent into the steam drum 401 through the air inlet pipe 402, so that the steam accumulates inside the steam drum 401 and the stirring tube 405. The air pressure increases, forcing the steam to push the push plate 414 and the traction rod 407 to slide down along the inner wall of the positioning block 406, and the sealing ball 411 is pulled to move by the traction rope 413, thereby releasing the seal on the vent pipe 408, making it easier for steam to enter the mixing drum 2 through the vent pipe 408 , and is evenly mixed with the basic raw materials, thereby maturing the basic raw materials during the stirring and mixing process, thereby improving the maturation efficiency. After the steam in the steam cylinder 401 and the stirring tube 405 is discharged, the air pressure is restored, and the push plate 414 and the traction rod 407 are pushed back to their original positions by the reset spring 430. The elastic rope 410 is used to shrink, so as to pull the sealing ball 411 back to its original position and fit it with the retaining ring 412, thereby sealing the vent pipe 408, making it easier for steam to gather inside the steam cylinder 401 and the stirring tube 405, and continuously and intermittently maturing the basic raw materials inside the mixing cylinder 2, thereby improving the production and preparation effect.

[0061] Finally, after the basic raw materials are matured, the electric valve inside the discharge pipe 415 is opened, and the matured and mixed basic raw materials are discharged into the cooling transverse pipe 416. At the same time, the driving motor 419 drives the rotating rod 423 and the spiral conveying plate 424 to rotate, and the basic raw materials are moved along the cooling transverse pipe 416. The air is sent into the heat exchange air pipe 428 through the fan 427 inside the air inlet tube 426, and the heat exchange air pipe 428 passes through the insulation pipe 425 outside the cooling transverse pipe 416 to exchange heat and cool the basic raw materials inside the cooling transverse pipe 416 to reduce the temperature of the basic raw materials. In addition, during the cooling and conveying process, the filling hopper 429 is used to add Add core materials with good proportions to mix the core materials with the basic raw materials, and with the continuous conveying of the spiral conveying plate 424, the core materials and the basic raw materials are sent into the tempering transverse tube 417. At the same time, the heat exchange air pipe 428 brings the heat after heat exchange into the insulation tube 425 outside the tempering transverse tube 417, and then the core materials and the basic raw materials inside the tempering transverse tube 417 are heated at low temperature, and tempered and mixed again to improve the mixing effect. Then, the mixed core materials and basic raw materials are conveyed to the granulation extrusion cylinder 418, and extrusion granulation is carried out through the cooperation of the drive motor 419, the extrusion wheel 422 and the scraper 421 to complete the production of feed.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology, characterized by: The steps include: S1. The basic raw material is fed into the filter cylinder (504) through the feed channel (505), and multi-stage filtration is performed with the help of the screening motor (506), the rotating rod (507), the material-dispensing plate (509) and the screen (508), so as to achieve the classification and discharge of full raw materials, unfull raw materials and debris; S2, using the rotating motor (522) to drive the load-bearing rod (513), the lifting crawler (514) and the material lifting box (515), lifting the full raw materials to the crushing box (517) for crushing, and then discharging them into the storage box (304) for standby use; S3, delivering the base raw material into the metering cylinder (301) through the delivery auger (305) and the delivery pipe (303); S4, the electromagnet (317) and the magnetic ring (318) cooperate to push the pull rod (306), the top baffle (307), the top rod (315), and the bottom baffle (316) to move in opposite directions, and the measured raw materials are sent into the mixing drum (2); S5, start the stirring motor (403), and at the same time, send steam through the air inlet pipe (402), and discharge it into the mixing drum (2) through the vent pipe (408) to complete the aging; S6, the slaking raw materials fall into the cooling horizontal pipe (416) for cooling, and the core materials are added through the filling hopper (429), mixed and then enter the tempering horizontal pipe (417), and are tempered at low temperature by the heat of the gas in the heat exchange gas pipe (428); S7, the tempered mixed material enters the granulation extrusion cylinder (418), is driven by the driving motor (419), is extruded by the rotating mesh cylinder (420) and the extrusion wheel (422), and is cut by the scraper (421), completing the pig feed granulation.

2. A pig feed based on multi-stage conditioning and low-temperature granulation technology, characterized by: The pig feed is composed of the following materials by weight: 37-38 parts of corn, 14.50-15.50 parts of broken rice, 2-2.50 parts of rice bran meal, 1.80-2.20 parts of third-grade soybean oil, 2-3 parts of coated coconut oil powder, 4-5 parts of rice protein powder, 5.50-6.50 parts of 46% soybean meal, 2.50-3.50 parts of puffed soybeans, 4.50-5.50 parts of fermented soybean meal, and soy milk. 1-2 parts of Bao, 1.50-2.50 parts of imported fish meal, 7-8 parts of whey powder, 2-3 parts of white sugar, 2-3 parts of glucose, 0.90-0.94 parts of lysine hydrochloride 98%, 0.20-0.24 parts of DL-methionine 99%, 0.35-0.39 parts of threonine 98%, 0.10-0.14 parts of tryptophan 98%, 0.50-0.90 parts of monocalcium phosphate, calcium formate 0.80-1.20 parts, sodium chloride 0.20-0.40 parts, peptide iron 0.01-0.03 parts, zinc oxide 0.10-0.30 parts, Yingtai No. 2 0.05-0.07 parts, muscle source 0.05-0.07 parts, Feipu sweet 0.02-0.04 parts, Feipu fragrance 0.08-0.12 parts, mold 0.04-0.06 parts, antioxidant 0.04-0.06 parts, 0.40-0.60 parts of citric acid monohydrate, 0.40-0.60 parts of orotic acid, 0.08-0.12 parts of tributyrin, 0.04-0.06 parts of choline chloride 50%, 0.03-0.05 parts of suckling pig compound multivitamins, 0.15-0.25 parts of 0.2% compound micro-minerals, 0.20-0.30 parts of resource montmorillonite, and 0.45-0.55 parts of HB8020 core material.

3. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 1, characterized in that: A mixing cylinder (2) is clamped on the inner wall of the mixing bracket (1), and a metering feeding mechanism (3) is provided at the top end of the mixing cylinder (2), and the metering feeding mechanism (3) includes a metering cylinder (301); The top of the mixing cylinder (2) is symmetrically connected to a metering cylinder (301), the tops of the two metering cylinders (301) are fixedly connected to a connecting cylinder (302), the opposite ends of the two connecting cylinders (302) are both connected to a delivery pipe (303), the other end of the delivery pipe (303) is fixedly connected to a storage box (304), and the inner wall of the storage box (304) is rotatably connected to a delivery auger (305) at a position corresponding to the inner part of the delivery pipe (303), and the connecting cylinder (3 02) The top end is symmetrically and movably connected with a pull rod (306), the bottom end of the pull rod (306) is fixedly connected with a top baffle (307) at a position corresponding to the bottom of the connecting tube (302), the bottom end of the connecting tube (302) is fixedly connected with a support spring (308), the top position of the support spring (308) is fixedly connected with a floating plate (309), and the inner wall of the floating plate (309) is clamped with a dispensing pipe (310) at a position corresponding to the inner side of the support spring (308); The bottom end of the metering cylinder (301) and the top end of the mixing cylinder (2) are both clamped with a discharge pipe (311); a fixing ring (312) is fixedly sleeved on the outer side of the dispensing pipe (310) at a position corresponding to the inner position of the discharge pipe (311); a vertical rod (313) is symmetrically clamped on the bottom end of the fixing ring (312); the bottom ends of the two vertical rods (313) are both clamped with a limiting pad (314); the inner wall of the limiting pad (314) is movably connected with a push rod (315); the top end of the push rod (315) is fixedly connected with a bottom baffle (316) at a position corresponding to the bottom of the dispensing pipe (310); the top end of the connecting cylinder (302) and the bottom end of the limiting pad (314) are both fixedly connected with an electromagnet (317) by bolts; the outer side of the pull rod (306) and the outer side of the push rod (315) are both fixedly sleeved with a magnetic ring (318).

4. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 3, characterized in that: The inside of the metering cylinder (301) is filled with liquid at a position corresponding to the bottom of the floating plate (309), the top of the dispensing pipe (310) is clamped with a material guide plate, and the outer side of the material guide plate and the outer side of the floating plate (309) are both slidably connected to the inner wall of the metering cylinder (301), the bottom end of the dispensing pipe (310) passes through the bottom end of the metering cylinder (301), the outer side of the dispensing pipe (310) is slidably connected to the inner wall of the bottom end of the metering cylinder (301), and a sealing ring is sleeved between the outer side of the dispensing pipe (310) and the metering cylinder (301), and the top of the top baffle (307) and the top of the bottom baffle (316) are both arc-shaped plates.

5. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 4, characterized in that: A connecting pipe (319) is fixedly connected to the bottom position of the outer side of the metering cylinder (301); the other end of the connecting pipe (319) is fixedly connected to a liquid level pipe (320) at a position corresponding to the top of the mixing cylinder (2); the top of the liquid level pipe (320) is movably connected to a lifting rod (321); the bottom end of the lifting rod (321) is fixedly connected to a liquid level plate (322) at a position corresponding to the inside of the liquid level pipe (320) via bolts; the top of the liquid level pipe (320) is fixedly connected to electric telescopic rods (323) at positions on both sides of the lifting rod (321) via bolts; the top of the liquid level pipe (320) is clamped to a position corresponding to the outer side of the lifting rod (321); the top of the supporting plate (324) and the bottom ends of the two electric telescopic rods (323) are fixedly connected to a touch switch (325) via bolts; the bottom end of the liquid level plate (322) is fixedly connected to a tensioning spring (326); The liquid level tube (320) is made of an acrylic plate, and a scale line is provided on the outside of the liquid level tube (320). The electromagnet (317), the electric telescopic rod (323) and the touch switch (325) are all powered by an external power supply, and the signal output end of the touch switch (325) is connected to the input end of the electromagnet (317). The top end of the lifting rod (321) is fixedly connected to a pressure plate.

6. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 4, characterized in that: A multi-stage mixing and conditioning mechanism (4) is provided at the bottom end of the mixing cylinder (2), and the multi-stage mixing and conditioning mechanism (4) includes a steam cylinder (401); The top of the mixing cylinder (2) is clamped with a steam cylinder (401), and the outside of the steam cylinder (401) is fixedly connected to an air inlet pipe (402), the top of the steam cylinder (401) is fixedly connected to a stirring motor (403) by means of bolts, the bottom end of the output shaft of the stirring motor (403) is clamped with a connecting rod (404) at an equidistant position corresponding to the internal position of the steam cylinder (401), the bottom end of the connecting rod (404) is fixedly connected with a stirring tube (405) at an internal position corresponding to the mixing cylinder (2), the inner wall of the stirring tube (405) is clamped with a positioning block (406) at an equidistant position, and the inner wall of the positioning block (406) is slidably connected to a traction rod (407), and the inner wall of the stirring tube (405) is spirally and equidistantly provided with ventilation holes. The vent pipe (408) is provided with a filter screen (409) on the inner wall thereof, one end of the filter screen (409) is fixedly connected to an elastic rope (410), the other end of the elastic rope (410) is fixedly connected to a sealing ball (411) at a position corresponding to the inner portion of the vent pipe (408), a retaining ring (412) is fixedly connected to a position on the inner wall of the vent pipe (408) corresponding to one side of the sealing ball (411), a traction rope (413) is fixedly connected to the outer side of the traction rod (407) at a position corresponding to one side of the vent pipe (408), the bottom end of the traction rod (407) is fixedly connected to a push plate (414) by means of bolts, and the bottom end of the push plate (414) is fixedly connected to a return spring (430) by means of bolts.

7. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 6, characterized in that: The bottom end of the mixing cylinder (2) is fixedly connected with a discharge pipe (415), the bottom end of the discharge pipe (415) is fixedly connected with a cooling transverse pipe (416), one end of the cooling transverse pipe (416) is clamped with a tempering transverse pipe (417), the other end of the tempering transverse pipe (417) is fixedly connected with a granulation extrusion cylinder (418) by bolts, one end of the granulation extrusion cylinder (418) is fixedly connected with a driving motor (419) by bolts, the output shaft of the driving motor (419) is clamped with a rotating rod (423) at a position inside the granulation extrusion cylinder (418), the outer side of the rotating rod (423) is fixedly connected with a rotating net cylinder (420) at a position inside the granulation extrusion cylinder (418) by bolts, and the granulation extrusion cylinder The outer side of (418) is fixedly connected with a scraper (421) by bolts at equal intervals, the inner wall of the rotating mesh cylinder (420) is symmetrically connected with an extrusion wheel (422), the outer side of the rotating rod (423) is fixedly sleeved with a spiral conveying plate (424), the outer side of the cooling cross pipe (416) and the outer side of the tempering cross pipe (417) are fixedly sleeved with an insulation pipe (425), one end of the insulation pipe (425) is fixedly connected with an air inlet tube (426), and a fan (427) is installed inside the air inlet tube (426), the inner wall of the air inlet tube (426) is equidistantly connected with a heat exchange air pipe (428) at a position corresponding to the inner side of the insulation pipe (425), and the top of the cooling cross pipe (416) is fixedly connected with a filling hopper (429); The outside of the stirring tube (405) is fixedly connected with stirring blades at equal intervals, the other end of the traction rope (413) is fixedly connected to one end of the sealing ball (411), the outside of the push plate (414) is in contact with the inner wall of the stirring tube (405), and an electric valve is installed on the inner wall of the discharge pipe (415). The stirring motor (403), the drive motor (419), the fan (427) and the electric valve are all powered by an external power supply.

8. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 7, characterized in that: One end of the scraper (421) is in contact with the outside of the rotating mesh cylinder (420); the bottom end of the granulation extrusion cylinder (418) is fixedly connected with a discharge port; the other end of the heat exchange air pipe (428) passes through the outside of the insulation pipe (425) on the tempering transverse pipe (417); and the cooling transverse pipe (416) and the tempering transverse pipe (417) are both made of heat conducting plates.

9. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 7, characterized in that: Both ends of the mixing drum (2) are provided with a feeding and screening mechanism (5), and the feeding and screening mechanism (5) includes a support frame (501); The bottom ends of the two storage boxes (304) are fixedly connected to a support frame (501), one end of the two support frames (501) is fixedly connected to a lifting box (502), the bottom position of one end of the lifting box (502) is fixedly connected to a material guide channel (503), the other end of the material guide channel (503) is fixedly connected to a filter cartridge (504), the top of the filter cartridge (504) is fixedly connected to a feed channel (505), the bottom end of the filter cartridge (504) is fixedly connected to a screening motor (506) by bolts, the output shaft of the screening motor (506) corresponds to the internal fixed shaft of the filter cartridge (504). A rotating rod (507) is fixedly connected and clamped, a screen (508) is equidistantly clamped on the outside of the filter cartridge (504) at a position corresponding to the outside of the rotating rod (507), a material-dispensing plate (509) is equidistantly clamped on the outside of the rotating rod (507) at a top of the screen (508) and inside the filter cartridge (504), a material-guiding truncated cone (510) is fixedly connected on the outside of the rotating rod (507) at a position corresponding to the inside of the feed channel (505), a magnetic plate (511) is fixedly connected to the inner wall of the material-guiding truncated cone (510) by bolts, and a material-discharging channel (512) is symmetrically clamped on the outside of the filter cartridge (504); The top and bottom positions of the inner wall of the lifting box (502) are both rotatably connected with load-bearing rods (513), and the outer sides of the two load-bearing rods (513) are sleeved with lifting tracks (514) at positions corresponding to the inner sides of the lifting box (502). The outer sides of the lifting tracks (514) are equidistantly connected with lifting boxes (515). The top position of the other end of the lifting box (502) is connected with a discharge channel (516), and the top of the storage box (304) is connected with a crushing box (517) at a position corresponding to the bottom position of the discharge channel (516). The inner wall of the crushing box (517) is symmetrically rotatably connected with crushing rollers (518), and one end of the rotating shaft of the two crushing rollers (518) is connected with a transmission gear at a position corresponding to one side of the crushing box (517). (519), a transmission wheel (520) is sleeved on the outer side of the rotating shaft of the crushing roller (518), the outer side of a load-bearing rod (513) and the outer side of the rotating shaft of the conveying auger (305) corresponding to the other side of the crushing box (517), a belt (521) is sleeved on the outer side of the transmission wheel (520) on the rotating shaft of one crushing roller (518) and the transmission wheel (520) on the rotating shaft of the conveying auger (305), and a belt (521) is sleeved on the outer side of the transmission wheel (520) on the rotating shaft of the other crushing roller (518) and the transmission wheel (520) on the load-bearing rod (513), and a rotating motor (522) is fixedly connected to the top of one end of the lifting box (502) at a position corresponding to one side of the load-bearing rod (513) by bolts.

10. The method for preparing pig feed based on multi-stage conditioning and low-temperature granulation technology according to claim 9, characterized in that: One of the discharge channels (512) is correspondingly installed on the outside of one screen (508), and the other discharge channel (512) is correspondingly installed on the outside of another screen (508). A slag discharge port is provided at the bottom end of the filter cylinder (504). The top ends of the two screens (508) and the bottom end of the filter cylinder (504) are inclined. The bottom ends of the three groups of the material-selecting plates (509) are respectively fitted with the top ends of the screens (508) and the bottom end of the filter cylinder (504). One end of the output shaft of the rotating motor (522) is fixedly connected to one end of the load-bearing rod (513). The rotating motor (522) and the screening motor (506) are both powered by an external power supply.

Images