Pipeline conveying system and method for pet food processing production line and pretreatment process

Abstract

The invention discloses a pipeline conveying system and method for a pet food processing production line and a pretreatment process, and relates to the technical field of pet food processing. The integrated conveying pipe body is continuously connected with the pet food processing assembly; the integrated conveying pipe body is provided with a pressure sensor arranged in the axial direction of a pipeline of the integrated conveying pipe body, and the filling pressure value of materials in the integrated conveying pipe body can be monitored. The problems that in the prior art, the operation efficiency is not high in the pet food product pretreatment procedure, and the material conveying continuity is poor easily due to a hollow area in a pipeline are solved.

Description

Technical Field

[0001] This invention relates to the field of pet food product pretreatment technology, and more specifically, to a pipeline conveying system, method, and pretreatment process for pet food processing production lines. Background Technology

[0002] With the rapid development of the pet food industry, pet food has seen continuous market demand growth due to its advantages such as better preservation of raw material nutrients and long shelf life. Currently, in the pet food production process, pretreatment is a crucial step in ensuring the final product quality, taste, and production efficiency. It directly affects subsequent pet food processing steps and the product's market competitiveness. Therefore, high-quality pretreatment technology is gradually becoming a core requirement in the industry.

[0003] In the current technology, most companies in the industry still use traditional manual operation mode in the pre-processing stage of pet food products. Under this mode, each step, from thawing frozen raw materials and removing foreign objects to mincing, mixing, and shaping meat, still relies on manual participation. This makes the current pre-processing process, especially the conveying process, not only inefficient overall and unable to meet the needs of large-scale production, but also prone to forming hollow areas in some conveying pipelines when conveying viscous media such as minced meat and meat sauce. These hollow areas result in poor material conveying continuity and further lead to insufficient supply or ratio deviation of the raw materials for shaping, thus affecting the quality stability of the shaped products. Summary of the Invention

[0004] Therefore, the present invention provides a pipeline conveying system, method and pretreatment process for pet food processing production lines to solve the technical problems of low operation efficiency and poor material conveying continuity caused by the hollow area inside the conveying pipeline in the prior art for the pretreatment process of pet food products.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A pipeline conveying system for a pet food processing production line, comprising: Pet food processing components; An integrated conveying pipe is connected to the pet food processing component. The integrated conveying pipe is equipped with pressure sensors arranged along its axial direction, which can monitor the filling pressure of the material inside the integrated conveying pipe.

[0006] Based on the above technical solution, the present invention is further described as follows: As a further aspect of the present invention, The integrated delivery pipe body also has a switch valve body located downstream of the pressure sensor; The switch valve body is located at the opening position on the side wall of the integrated delivery pipe.

[0007] As a further aspect of the present invention, The integrated delivery pipe is equipped with a twin screw pump and a negative pressure suction pump. The integrated conveying pipe is also equipped with a flow sensor and a high-frequency ultrasonic sensor installed in parallel with the pressure sensor; the flow sensor can monitor the material conveying speed and material flow rate inside the integrated conveying pipe, and the high-frequency ultrasonic sensor can collect the interface reflection signal between the material and the air.

[0008] A pipeline conveying method according to the pipeline conveying system for a pet food processing production line, comprising: Establish a baseline pressure curve for a pipeline under full material conditions as a reference standard for determining the hollow zone; When a pressure sensor detects a pressure drop of not less than 0.1 MPa and a duration of not less than 50 ms, and the pressure detected by the pressure sensor adjacent to the pressure sensor does not change significantly, the interface reflection signal of the ultrasonic sensor is used to determine that a hollow area has appeared at that location. Furthermore, by using a coupled calculation method combining sensor time difference and pipeline flow velocity, the specific location of the hollow area is accurately determined. The specific process is as follows: The material conveying speed v and flow rate Q in the pipeline are collected in real time by the flow sensor. When the pressure sensor A first detects a sudden pressure drop, and then detects a pressure rebound after an interval of Δt, the length of the hollow area L is calculated as (Q×Δt) / S, where S is the cross-sectional area of ​​the pipeline. The position coordinates of the hollow area are updated in real time by the pressure signal changes of subsequent sensors, forming the movement trajectory of the hollow area and performing dynamic tracking. Based on the moving speed v of the hollow zone, which is consistent with the material conveying speed, the predicted node time t = (x2-x1) / v for the hollow zone to reach the downstream switch valve body is determined, where x2 is the position coordinate of the downstream switch valve body node and x1 is the current position coordinate of the hollow zone. The opening degree of the downstream switch valve body is adjusted according to the node time t corresponding to the hollow zone, so that the switch valve body can automatically open and release pressure when the hollow zone moves to the position of the switch valve body.

[0009] As a further aspect of the present invention, The flow sensor, the high-frequency ultrasonic sensor, and the pressure sensor are respectively connected to the control input terminal of the electronic control module, and the control output terminal of the electronic control module is connected to the switch valve body and the twin-screw pump through a circuit. When the pressure is released by moving the starting end of the hollow zone to the position of the switch valve body, the speed of the twin-screw pump and / or the screw conveyor is adjusted synchronously according to the control command. This increases the material conveying volume of the hollow zone from the upstream and reduces the pushing effect on the downstream material section of the hollow zone through the pressure release to achieve stable filling of the hollow zone and improve the continuity of material conveying.

[0010] As a further aspect of the present invention, After the twin-screw pump adjusts its speed, the upstream material conveying speed value added to the original displacement speed is not less than the displacement speed value of the hollow zone.

[0011] A pretreatment process for a pet food processing production line includes the aforementioned pipeline transportation method.

[0012] As a further aspect of the present invention, the following steps are also included; Specific raw materials are transported by category and cooked and processed differently using steam. The untreated raw materials and the cooled and matured raw materials are sequentially fed into the grinding and chopping assembly; The materials and auxiliary materials are further mixed in a vacuum environment; The mixed materials are shaped in various ways using a molding mechanism.

[0013] As a further aspect of the present invention, The specific classification and delivery of raw materials, and the differentiated steam cooking process, includes: After thawing and undergoing full inspection, the meat raw materials are classified and processed according to type. The classification types of meat raw materials include Category I meat raw materials, which account for 10% of the total; Category II bone-in meat raw materials, which account for 10% of the total; and Category III conventional meat raw materials, which account for 80% of the total. The first type of meat raw material, accounting for 10% of the total, is fed into the steaming and cooking mechanism through the conveying component. The steaming and cooking mechanism uses steam heating to cook the raw material. The steam temperature and cooking time are precisely controlled according to the preset process parameters to ensure that the raw material is thoroughly cooked and retains its nutrients. After that, the raw material is quickly cooled after being taken out of the box. 10% of the total bone-in meat and 80% of the total regular meat are not steamed or boiled. The process of sequentially feeding untreated raw materials and cooled, matured raw materials into a grinding and chopping assembly specifically includes: After the first type of meat raw material is steamed and cooked, it is rapidly cooled to the preset temperature and then automatically conveyed to the second type of bone-in meat raw material and the third type of regular meat raw material through the corresponding spiral lifting mechanism. The spiral lifting mechanism runs smoothly according to the preset conveying rate, and accurately feeds the various types of meat raw materials into the meat grinder input end of the grinding, chopping and grinding component in sequence, thus completing the automated transfer of raw materials.

[0014] As a further aspect of the present invention, The classification and delivery of specific raw materials, and the differentiated steam cooking process, specifically includes: A meat feed ratio control architecture is constructed to perform meat feed ratio identification and density difference correction processes on weighed meat feed. The specific process is as follows: Based on the production requirements, the total volume V of the single addition of meat is preset, and the target volume ratio parameter between muscle tissue and fat tissue is obtained as V1:V2. Then, according to the standard density values ​​of muscle tissue and fat tissue, combined with the density formula m=ρ×V, the target weighing weight M1 of muscle tissue and the target weighing weight M2 of fat tissue, as well as the target total weighing weight M, are calculated. Weigh a piece of meat with a weight of M, and perform a spectral scan on the current meat based on the near-infrared spectral detection module in the meat proportion control architecture to obtain the spectral characteristic data of the meat. The spectral characteristic data includes, but is not limited to, characteristic absorption peak wavelength and absorbance value parameters. The obtained spectral characteristic data is compared and matched with a preset muscle tissue and adipose tissue spectral database. By comparing the spectral characteristic parameters of muscle tissue and adipose tissue in the meat raw material, the actual volume ratio of muscle tissue and adipose tissue in the total volume V of the current meat is obtained as V3:V4. Based on the current total mass parameter M of the meat, and combined with the identified actual volume ratio of muscle tissue to fat tissue V3:V4 and the actual density values ​​of muscle tissue and fat tissue respectively, the mass of muscle tissue M3 and the mass of fat tissue M4 in the current meat are calculated using the density formula m=ρ×V, and are used as the actual mass of muscle tissue and fat tissue. Therefore, the difference M5 between the current muscle tissue mass M3 and the target weight M1 of the muscle tissue, and the difference M6 between the current fat tissue mass M4 and the target weight M2 of the fat tissue are calculated. Based on the difference M5 and the difference M6, the corresponding mass of muscle tissue and fat tissue are increased or decreased accordingly to avoid the deviation of the ingredient volume caused by the density difference. Then, the weighed meat material after the muscle tissue and fat tissue ratio identification and correction is completed is transported to the subsequent process.

[0015] The present invention has the following beneficial effects: 1. This pipeline conveying architecture can effectively ensure the continuity of material conveying and the accuracy of proportioning based on pressure sensor monitoring and coordinated control of valves, avoiding insufficient supply of molding raw materials or proportioning deviations caused by hollow areas, thereby significantly enhancing the quality stability of molded products.

[0016] 2. Through the spatial layout and coordinated operation of various equipment, this production line can achieve fully automated operation from raw material thawing and inspection to product pre-freezing and shaping, effectively solving the problem of low efficiency in traditional manual pre-processing. At the same time, the elevated arrangement of conveying pipelines can better adapt to the spatial layout of the production line, significantly improving the utilization rate of vertical space and enhancing the overall functionality and practicality. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The structures, proportions, sizes, etc., drawn in this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0018] Figure 1 This is an overall isometric structural diagram of the pipeline transportation system, method, and pretreatment process for pet food processing production lines provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall process of the automated pretreatment process based on a pet food processing production line provided in an embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1-Grinding and chopping assembly; 2-Premixing and storage mechanism; 3-Vacuum stirring mechanism; 4-Forming mechanism; 5-Integrated conveying pipe. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The terms "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0023] like Figure 1 As shown, this embodiment of the invention provides a pipeline conveying system, method, and pretreatment process for a pet food processing production line. It includes a grinding and chopping assembly 1, a premixing and storage mechanism 2, a vacuum stirring mechanism 3, a forming mechanism 4, and an integrated conveying pipe 5. Through the coordinated operation of these components and mechanisms, and via the integrated conveying pipe 5, the entire pretreatment process for pet food products is effectively conveyed and processed, thereby significantly improving the processing efficiency of the pretreatment step. The specific setup is as follows: Please refer to Figure 1 The grinding and chopping assembly 1 includes a meat grinder, a chopper, and a bone mill. The meat grinder has a direct output end and also has output ends that are respectively connected to the chopper and the bone mill, so that the meat grinder can receive various meat raw materials, perform preliminary grinding, and then output or transport them to the chopper or the bone mill. This adapts to the different processing needs of different meat raw materials. At the same time, the speed and aperture of the meat grinder's blade can be adjusted according to the process requirements to effectively ensure that the particle size of the ground meat raw materials is more in line with the subsequent processing standards.

[0024] Specifically, for example, for the first type of meat raw material, after being minced by the meat grinder, it automatically enters the chopper through the conveying pipe. The chopper further chops the minced meat raw material, processing it into a finer meat paste. The chopping speed and time of the chopper can be precisely controlled to effectively ensure the uniformity and fineness of the meat paste. For the second type of meat raw material, after being minced by the meat grinder, it automatically enters the bone paste mill through the conveying pipe. The bone paste mill grinds the minced bone-in meat into meat sauce, so that the bone and meat are fully integrated, which can effectively improve the utilization rate of raw materials and the compatibility of mixing. For the third type of meat raw material, after being minced by the meat grinder, it is directly conveyed to the subsequent premixed storage unit 2 through the conveying pipe, thereby flexibly adapting to the differentiated processing needs of different meat raw materials.

[0025] Please continue to refer to this. Figure 1 The premixed storage mechanism 2 is connected to the integrated conveying pipe 5 and located downstream of the grinding and chopping assembly 1. That is, the integrated conveying pipe 5 is connected to the direct output end of the meat grinder, the output end of the chopper, and the output end of the bone mortar mill. The integrated conveying pipe 5 is equipped with a twin-screw pump and a negative pressure suction pump to reduce material residue in the pipe through greater conveying power and improve the stability and efficiency of material conveying.

[0026] Specifically, the integrated conveying pipe body 5 is based on a raised structure within a specific space. That is, the integrated conveying pipe body 5 includes a longitudinal pipe, a transverse pipe, and an inclined pipe that are connected in series. Each pipe segment is equipped with a bend of the same diameter at the corner, which is suitable for the production line space layout and significantly improves the utilization rate of longitudinal space.

[0027] As a preferred embodiment, both ends of the integrated conveying tube 5 are openable, and an air-sealed flexible plug is provided inside the integrated conveying tube 5. The air-sealed flexible plug is displaceable and fits into the interior of the integrated conveying tube 5, and the air-sealed flexible plug can be detachably set from the openings at both ends of the integrated conveying tube 5. An air-blowing assembly is detachably provided at at least one end opening of the integrated conveying tube 5. The pneumatic output end of the air-blowing assembly is connected to the at least one end opening of the integrated conveying tube 5 to output pneumatic energy. Based on the pneumatic energy, the air-sealed flexible plug is driven along the integrated conveying tube 5, thereby scraping away the meat inside the integrated conveying tube 5 with the help of the air-sealed flexible plug, thus completing the internal cleaning process of the integrated conveying tube 5.

[0028] More specifically, after being processed by the mincing, chopping, and grinding component 1, various meat materials are automatically fed into the premixing and storage mechanism 2 through the integrated conveying pipe 5 according to the process requirements. The premixing and storage mechanism 2 is equipped with a stirring component and a weighing component. In addition to realizing the automatic receiving and buffering functions of meat materials, the stirring component can further prevent the meat materials from stratifying during the buffering process, and the weighing component can accurately assist in controlling the proportion of various meat materials to ensure that the raw material proportions in the subsequent mixing process meet the process requirements.

[0029] The vacuum mixing mechanism 3 is connected to the integrated conveying pipe 5 and located downstream of the premixed storage mechanism 2. This allows the meat material buffered in the premixed storage mechanism 2 to automatically enter the vacuum mixing mechanism 3 through the integrated conveying pipe 5. The vacuum mixing mechanism 3 further mixes the premixed meat material with the powder / liquid additives. The powder / liquid additives automatically enter the vacuum mixing mechanism 3 through the conveying pipe according to the process ratio. The vacuum mixing mechanism 3 can mix the meat material and additives in a sealed vacuum environment. The vacuum environment can prevent the materials from contacting air during the mixing process, effectively preventing the materials from oxidizing and deteriorating. It can also reduce the generation of bubbles and ensure that the mixed materials have a uniform texture. During the mixing process, the speed of the mixing paddle and the mixing time can be adjusted according to the characteristics of the materials to ensure that the materials are mixed evenly.

[0030] Please continue to refer to this. Figure 1The forming mechanism 4 is connected to the integrated conveying pipe 5 and located downstream of the vacuum mixing mechanism 3. Specifically, the forming mechanism 4 includes an extrusion molding unit and a roller forming unit, which can flexibly meet the production needs of products with different shapes through different forming units. The uniformly mixed material is conveyed to the extrusion molding unit and the roller forming unit respectively through the integrated conveying pipe 5. The extrusion molding unit extrudes the material into different preset shapes such as strips and blocks through a mold. The extrusion pressure and speed can be precisely controlled to ensure the dimensional accuracy and shape consistency of the formed products. At the same time, the roller forming unit processes the material into meat patties of different shapes by rotating the roller. The rotation speed of the roller and the shape of the mold can be adjusted according to the process requirements, so as to effectively adapt to the diversification of pet food products.

[0031] The grinding and chopping assembly 1 is also connected to a cooking mechanism and a spiral lifting mechanism at the upstream end of the integrated conveying pipe 5. Specifically, the cooking mechanism can cook the frozen meat after thawing and full inspection by steam. The output end of the cooking mechanism is connected to the input end of the spiral lifting mechanism, and the output end of the spiral lifting mechanism is connected to the input end of the meat grinder. This allows the meat grinder to receive various meat raw materials from the spiral lifting mechanism and further complete the preliminary grinding process, thereby improving the overall automation level.

[0032] As a preferred embodiment, the vacuum stirring mechanism 3 may also be equipped with a temperature control component to accurately control the material temperature during the stirring process, thereby avoiding excessive temperature rise of the material due to heat generated by stirring friction, and thus further ensuring the quality of the conveyed material.

[0033] like Figure 2 As shown, this embodiment of the invention also provides an automated pretreatment process based on the above-described pipeline conveying system, method, and pretreatment process for pet food processing production lines, specifically including the following steps: S1: Frozen raw materials are naturally thawed, unpacked, and then fully inspected; The specific process is as follows: Frozen meat raw materials are placed in the thawing area for natural thawing. After thawing, the raw materials undergo full inspection by a testing agency. Then, foreign objects are removed from the raw materials and excess fascia is trimmed to ensure that the purity of the raw materials meets the processing requirements, providing qualified basic raw materials for subsequent processes. S2: Specific raw materials are transported by category and cooked and processed in a differentiated manner using steam; The specific process is as follows: After thawing and full inspection, the meat raw materials are classified and processed according to type. The classification types of meat raw materials include the first category of meat raw materials, which accounts for 10% of the total, mainly beef lungs and chicken livers; the second category of meat raw materials with bones, which accounts for 10% of the total; and the third category of conventional meat raw materials, which accounts for 80% of the total. The first type of meat raw materials, which account for 10% of the total, mainly beef lungs and chicken livers, are fed into the steaming and cooking unit through the conveying component. The steaming and cooking unit uses steam heating to cook the raw materials. The steam temperature and cooking time are precisely controlled according to the preset process parameters to ensure that the raw materials are thoroughly cooked and retain their nutrients. After that, the raw materials are quickly cooled after being taken out of the box. 10% of the total bone-in meat and 80% of the total regular meat are not steamed or boiled. Current technologies typically determine the amount of meat to be added at one time by pre-setting the required volume and directly weighing out a specific mass of meat based on that volume requirement before adding it to subsequent processes. However, due to the density differences between different types of meat, such as muscle tissue and fat tissue, the volume of meat of the same mass can vary significantly, which affects the final output and makes it difficult to achieve a stable final product texture. Therefore, as a preferred embodiment, a meat proportion control architecture is constructed to perform meat proportion identification and density difference correction processes on the weighed meat. The specific process is as follows: Based on the production requirements, the total volume V of the single addition of meat is preset, and the target volume ratio parameter between muscle tissue and fat tissue is obtained as V1:V2. Then, according to the standard density values ​​of muscle tissue and fat tissue, combined with the density formula m=ρ×V, the target weighing weight M1 of muscle tissue and the target weighing weight M2 of fat tissue, as well as the target total weighing weight M, are calculated. Weigh a piece of meat with a weight of M, and perform a spectral scan on the current meat based on the near-infrared spectral detection module in the meat proportion control architecture to obtain the spectral characteristic data of the meat. The spectral characteristic data includes, but is not limited to, characteristic absorption peak wavelength and absorbance value parameters. The obtained spectral characteristic data is compared and matched with a preset muscle tissue and adipose tissue spectral database. By comparing the spectral characteristic parameters of muscle tissue and adipose tissue in the meat raw material, the actual volume ratio of muscle tissue and adipose tissue in the total volume V of the current meat is obtained as V3:V4. Based on the current total mass parameter M of the meat, and combined with the identified actual volume ratio of muscle tissue to fat tissue V3:V4 and the actual density values ​​of muscle tissue and fat tissue respectively, the mass of muscle tissue M3 and the mass of fat tissue M4 in the current meat are calculated using the density formula m=ρ×V, and are used as the actual mass of muscle tissue and fat tissue. Therefore, the difference M5 between the current muscle tissue mass M3 and the target weight M1 of the muscle tissue, and the difference M6 between the current fat tissue mass M4 and the target weight M2 of the fat tissue are calculated. Based on the difference M5 and the difference M6, the corresponding mass of muscle tissue and fat tissue are increased or decreased accordingly to avoid the deviation of the ingredient volume caused by the density difference. Then, the weighed meat material after the muscle tissue and fat tissue ratio has been identified and corrected is transported to the subsequent process. S3: The untreated raw materials and the cooled and matured raw materials are sequentially fed to the grinding and chopping assembly 1; The specific process is as follows: After the first type of meat raw material is steamed and cooked, it is rapidly cooled to the preset temperature and then automatically conveyed by the second type of bone-in meat raw material and the third type of conventional meat raw material through the corresponding spiral lifting mechanism. The spiral lifting mechanism runs smoothly according to the preset conveying rate and accurately feeds the various types of meat raw materials into the meat grinder input end of the grinding and chopping component 1 in sequence, so as to realize the automated transfer of raw materials and reduce manual intervention. S4: Differentiated mincing processing based on the type of meat raw material received; The specific process is as follows: The meat grinder receives various types of meat raw materials from the spiral lifting mechanism, adjusts the speed and aperture parameters of the cutter disc according to the different types of meat raw materials, and performs preliminary mincing of the meat raw materials; Among them, the first type of meat raw material is minced by the meat grinder and then sent to the chopper through the corresponding output end via the conveying pipe; the second type of bone-in meat raw material is minced by the meat grinder and then sent to the bone paste mill through the twin screw pump; the third type of conventional meat raw material is minced by the meat grinder and then connected to the integrated conveying pipe 5 through its direct output end. S5: Deep chopping or grinding of specific meat raw materials; The specific process is as follows: the chopper receives the first type of minced meat raw material and further chops it according to the preset chopping speed and time parameters to process it into a fine and uniform meat paste. The bone paste mill receives the second type of bone-in meat raw material after it has been minced, and grinds it into a meat paste in which the bone and meat are fully integrated through the grinding components, thereby improving the utilization rate of meat raw materials and the compatibility of mixing. Both types of deep-processed meat raw materials mentioned above are connected to the integrated conveying pipe body 5 through output pipes; S6: Premix and buffer several types of meat raw materials in a quantitative manner; The specific process is as follows: the twin screw pump and the negative pressure suction pump are started through the integrated conveying pipe 5 to generate stable conveying power, and the third type of meat raw material directly output by the meat grinder, the meat paste output by the chopper, and the meat sauce output by the bone paste mill are simultaneously conveyed to the premixed storage mechanism 2 according to the preset process ratio. The weighing component in the premixed storage unit 2 accurately measures the amount of various materials in real time to ensure that the ratio meets the requirements. At the same time, the stirring component runs continuously at a low speed to prevent the meat from separating during the buffering process. S7: The materials and auxiliary materials are further mixed in a vacuum environment; The specific process is as follows: After the premixing and buffering is completed, the integrated conveying pipe 5 automatically sends the mixed meat into the vacuum mixing mechanism 3, and at the same time, the powder / liquid auxiliary materials enter the vacuum mixing mechanism 3 through the conveying pipe according to the process ratio. The vacuum mixing mechanism 3 first creates a sealed vacuum environment by drawing a vacuum, and then starts the mixing components. The speed of the mixing paddle and the mixing time are adjusted according to the characteristics of the materials to fully mix the meat and auxiliary materials, avoid oxidation and deterioration of the materials and the generation of bubbles, and ensure that the mixed materials have a uniform texture. During the mixing process, the temperature control component monitors and adjusts the material temperature in real time to prevent the temperature from rising excessively due to the friction of the mixing, thus ensuring the quality of the materials. S8: The mixed materials are shaped in various ways by the molding mechanism 4; The specific process is as follows: the uniformly mixed materials are conveyed through the integrated conveying pipe 5 to the extrusion molding unit and the roller molding unit of the molding mechanism 4 respectively; The extrusion molding unit changes the corresponding mold according to the preset product shape, and adjusts the extrusion pressure and speed parameters to extrude the material into preset shapes such as strips and blocks; the roller forming unit processes the material into meat patties of different shapes by adjusting the roller speed and changing the mold, thereby meeting the diversified production needs of pet food products.

[0034] As a preferred embodiment, in order to accommodate the hollow areas formed by material gaps during the conveying of viscous media such as minced meat and meat sauce in the integrated conveying pipe 5, the automated pretreatment system further integrates a pipeline conveying system for hollow area pressure monitoring and coordinated control. That is, through pressure sensing monitoring and multi-module coordination, closed-loop management of real-time monitoring and dynamic control of the hollow area is achieved, thereby ensuring the continuity of material conveying and the accuracy of proportioning, avoiding insufficient supply of molding raw materials or proportioning deviations caused by hollow areas, and thus significantly enhancing the quality stability of the molded products. Specific settings are as follows: The hollow zone pressure monitoring and coordinated control pipeline delivery system includes a pressure sensor arranged axially along the integrated delivery pipe body 5 and a switch valve body located downstream of the pressure sensor. The switch valve body is located at the side wall opening of the integrated delivery pipe body 5. Specifically, the pressure sensor is a viscous media resistant and anti-clogging diffused silicon pressure sensor, and the pressure sensor is installed in an oblique embedding manner at a 30° angle to the pipeline axis. The detection end face of the pressure sensor is flush with the inner wall of the integrated delivery pipe body 5. Each group of pressure sensors is equipped with an automatic cleaning interface to remove meat residue adhering to the surface by periodically spraying food-grade sterile water, ensuring sensing accuracy and cleanliness.

[0035] Meanwhile, a flow sensor and a high-frequency ultrasonic sensor are installed in parallel with a pressure sensor. The flow sensor is used to monitor the material conveying speed and flow rate in the pipeline in real time. The high-frequency ultrasonic sensor is used to collect the interface reflection signal between the material and the air. The frequency of the high-frequency ultrasonic sensor is not less than 2MHz. It is used to combine the pressure signal collected by the pressure sensor with the flow signal and the ultrasonic signal for fusion processing. This can effectively identify the state of the hollow area inside the integrated conveying pipe 5, thereby further overcoming the limitation of viscous meat paste blocking the monitoring signal.

[0036] The process of the pipeline transportation system for monitoring and coordinating pressure control in the hollow region mentioned above includes the following steps: First, a baseline pressure curve is established for the conveying pipeline under full material conditions. The pressure fluctuation range of this baseline pressure curve is controlled within ±0.02MPa, which serves as a reference standard for judging the hollow zone. When a pressure sensor detects a pressure drop of not less than 0.1 MPa and a duration of not less than 50 ms, and the pressure detected by the pressure sensor adjacent to the pressure sensor does not change significantly, the interface reflection signal of the ultrasonic sensor is used to determine that a hollow area has appeared at that location. Furthermore, by using a coupled calculation method combining sensor time difference and pipeline flow velocity, the specific location of the hollow area is accurately determined. The specific process is as follows: The material conveying speed v and flow rate Q in the pipeline are collected in real time by the flow sensor. When the pressure sensor A first detects a sudden pressure drop, and then detects a pressure rebound after an interval of Δt, the length of the hollow area L is calculated as (Q×Δt) / S, where S is the cross-sectional area of ​​the pipeline. The position coordinates of the hollow area are updated in real time by the pressure signal changes of subsequent sensors, forming the movement trajectory of the hollow area and performing dynamic tracking. Based on the moving speed v of the hollow zone, which is consistent with the material conveying speed, the predicted node time t = (x2-x1) / v for the hollow zone to reach the downstream switch valve body is determined, where x2 is the position coordinate of the downstream switch valve body node and x1 is the current position coordinate of the hollow zone. The opening degree of the downstream switch valve body is adjusted according to the node time t corresponding to the hollow zone, so that the switch valve body can automatically open and release pressure when the hollow zone moves to the position of the switch valve body. More specifically, the flow sensor, the high-frequency ultrasonic sensor, and the pressure sensor are respectively connected to the control input terminal of the electronic control module, and the control output terminal of the electronic control module is connected to the switch valve body through a circuit to achieve overall automated coordinated control.

[0037] The control output terminal of the electronic control module is also connected to the twin screw pump and / or the screw conveyor via a circuit. When the pressure is released at the starting end of the hollow zone by moving to the position of the switch valve body, the speed of the twin screw pump and / or the screw conveyor is adjusted synchronously according to the control command. This increases the material conveying volume to the hollow zone from upstream and reduces the pushing effect on the downstream material section of the hollow zone through the pressure release, thereby achieving stable filling of the hollow zone and ensuring the continuity of material conveying and the overall functional stability.

[0038] More preferably, after the twin-screw pump and / or screw conveyor adjust their speed, the upstream material conveying speed value added on the basis of the original displacement speed is not less than the displacement speed value of the hollow area, so as to significantly improve the filling coverage of the hollow area and further ensure the continuous stability of material conveying.

[0039] The automated pre-processing system and process for pet food products provided in this invention, through the spatial layout and coordinated operation of various devices, can achieve fully automated operation from raw material thawing and inspection to product pre-freezing and shaping. This effectively solves the problems of low efficiency, poor hygiene, and material waste associated with traditional manual pre-processing. Simultaneously, the fully automated operation not only improves production efficiency and reduces labor intensity but also ensures product quality stability, effectively enhancing the company's market competitiveness. This process is flexibly applicable to the pre-processing production of various pet foods and has broad application prospects and promotional value.

[0040] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A pipeline conveying system for a pet food processing production line, characterized in that, include: Pet food processing components; An integrated conveying pipe is connected to the pet food processing component. The integrated conveying pipe is equipped with pressure sensors arranged along its axial direction, which can monitor the filling pressure of the material inside the integrated conveying pipe.

2. The pipeline conveying system for a pet food processing production line according to claim 1, characterized in that, The integrated delivery pipe body also has a switch valve body located downstream of the pressure sensor; The switch valve body is located at the opening position on the side wall of the integrated delivery pipe.

3. The pipeline conveying system for a pet food processing production line according to claim 2, characterized in that, The integrated delivery pipe is equipped with a twin screw pump and a negative pressure suction pump. The integrated conveying pipe is also equipped with a flow sensor and a high-frequency ultrasonic sensor installed in parallel with the pressure sensor; the flow sensor can monitor the material conveying speed and material flow rate inside the integrated conveying pipe, and the high-frequency ultrasonic sensor can collect the interface reflection signal between the material and the air.

4. A pipeline conveying method for a pipeline conveying system for a pet food processing production line as described in claim 3, characterized in that, The method includes: Establish a baseline pressure curve for a pipeline under full material conditions as a reference standard for determining the hollow zone; When a pressure sensor detects a pressure drop of not less than 0.1 MPa and a duration of not less than 50 ms, and the pressure detected by the pressure sensor adjacent to the pressure sensor does not change significantly, the interface reflection signal of the ultrasonic sensor is used to determine that a hollow area has appeared at that location. Furthermore, by using a coupled calculation method combining sensor time difference and pipeline flow velocity, the specific location of the hollow area is accurately determined. The specific process is as follows: The material conveying speed v and flow rate Q in the pipeline are collected in real time by the flow sensor. When the pressure sensor A first detects a sudden pressure drop, and then detects a pressure rebound after an interval of Δt, the length of the hollow area L is calculated as (Q×Δt) / S, where S is the cross-sectional area of ​​the pipeline. The position coordinates of the hollow area are updated in real time by the pressure signal changes of subsequent sensors, forming the movement trajectory of the hollow area and performing dynamic tracking. Based on the moving speed v of the hollow zone, which is consistent with the material conveying speed, the predicted node time t=(x2-x1) / v for the hollow zone to reach the downstream switch valve body is calculated, where x2 is the position coordinate of the downstream switch valve body node and x1 is the current position coordinate of the hollow zone. The opening degree of the downstream switch valve body is adjusted according to the node time t corresponding to the hollow zone, so that the switch valve body can automatically open and release pressure when the hollow zone moves to the position of the switch valve body.

5. The pipeline transportation method according to claim 4, characterized in that, The flow sensor, the high-frequency ultrasonic sensor, and the pressure sensor are respectively connected to the control input terminal of the electronic control module, and the control output terminal of the electronic control module is connected to the switch valve body and the twin-screw pump through a circuit. When the pressure is released by moving the starting end of the hollow zone to the position of the switch valve body, the speed of the twin-screw pump and / or the screw conveyor is adjusted synchronously according to the control command. This increases the material conveying volume of the hollow zone from the upstream and reduces the pushing effect on the downstream material section of the hollow zone through the pressure release to achieve stable filling of the hollow zone and improve the continuity of material conveying.

6. The pipeline transportation method according to claim 5, characterized in that, After the twin-screw pump adjusts its speed, the upstream material conveying speed value added to the original displacement speed is not less than the displacement speed value of the hollow zone.

7. A pretreatment process for pet food processing production lines, characterized in that, Including the pipeline transportation method as described in any one of claims 4-6.

8. The pretreatment process for pet food processing lines according to claim 7, characterized in that, It also includes the following steps; Specific raw materials are transported by category and cooked and processed differently using steam. The untreated raw materials and the cooled and matured raw materials are sequentially fed into the grinding and chopping assembly; The materials and auxiliary materials are further mixed in a vacuum environment; The mixed materials are shaped in various ways using a molding mechanism.

9. The pretreatment process for pet food processing lines according to claim 8, characterized in that, The specific classification and delivery of raw materials, and the differentiated steam cooking process, includes: After thawing and undergoing full inspection, the meat raw materials are classified and processed according to type. The classification types of meat raw materials include Category I meat raw materials, which account for 10% of the total; Category II bone-in meat raw materials, which account for 10% of the total; and Category III conventional meat raw materials, which account for 80% of the total. The first type of meat raw material, accounting for 10% of the total, is fed into the steaming and cooking mechanism through the conveying component. The steaming and cooking mechanism uses steam heating to cook the raw material. The steam temperature and cooking time are precisely controlled according to the preset process parameters to ensure that the raw material is thoroughly cooked and retains its nutrients. After that, the raw material is quickly cooled after being taken out of the box. 10% of the total bone-in meat and 80% of the total regular meat are not steamed or boiled. The process of sequentially feeding untreated raw materials and cooled, matured raw materials into a grinding and chopping assembly specifically includes: After the first type of meat raw material is steamed and cooked, it is rapidly cooled to the preset temperature and then automatically conveyed to the second type of bone-in meat raw material and the third type of regular meat raw material through the corresponding spiral lifting mechanism. The spiral lifting mechanism runs smoothly according to the preset conveying rate, and accurately feeds the various types of meat raw materials into the meat grinder input end of the grinding, chopping and grinding component in sequence, thus completing the automated transfer of raw materials.

10. The pretreatment process for a pet food processing line according to claim 9, characterized in that, The classification and delivery of specific raw materials, and the differentiated steam cooking process, specifically includes: A meat feed ratio control architecture is constructed to perform meat feed ratio identification and density difference correction processes on weighed meat feed. The specific process is as follows: Based on the production requirements, the total volume V of the single addition of meat is preset, and the target volume ratio parameter between muscle tissue and fat tissue is obtained as V1:V2. Then, according to the standard density values ​​of muscle tissue and fat tissue, combined with the density formula m=ρ×V, the target weighing weight M1 of muscle tissue and the target weighing weight M2 of fat tissue, as well as the target total weighing weight M, are calculated. Weigh a piece of meat with a weight of M, and perform a spectral scan on the current meat based on the near-infrared spectral detection module in the meat proportion control architecture to obtain the spectral characteristic data of the meat. The spectral characteristic data includes, but is not limited to, characteristic absorption peak wavelength and absorbance value parameters. The obtained spectral characteristic data is compared and matched with a preset muscle tissue and adipose tissue spectral database. By comparing the spectral characteristic parameters of muscle tissue and adipose tissue in the meat raw material, the actual volume ratio of muscle tissue and adipose tissue in the total volume V of the current meat is obtained as V3:V4. Based on the current total mass parameter M of the meat, and combined with the identified actual volume ratio of muscle tissue to fat tissue V3:V4 and the actual density values ​​of muscle tissue and fat tissue respectively, the mass of muscle tissue M3 and the mass of fat tissue M4 in the current meat are calculated using the density formula m=ρ×V, and are used as the actual mass of muscle tissue and fat tissue. Therefore, the difference M5 between the current muscle tissue mass M3 and the target weight M1 of the muscle tissue, and the difference M6 between the current fat tissue mass M4 and the target weight M2 of the fat tissue are calculated. Based on the difference M5 and the difference M6, the corresponding mass of muscle tissue and fat tissue are increased or decreased accordingly to avoid the deviation of the ingredient volume caused by the density difference. Then, the weighed meat material after the muscle tissue and fat tissue ratio identification and correction is completed is transported to the subsequent process.

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