Cross-contamination prevention automatic adjustable meat grinder

Abstract

The present application relates to meat processing technical field, specifically is related to a kind of meat processing is used to prevent cross-contamination automatic adjustable meat grinder. Including body, inlet and outlet are equipped on the body, the body is equipped with feed screw, meat chopper assembly and screen plate assembly, wherein screen plate assembly includes fixed screen plate and movable screen plate, in processing state, fixed screen plate and movable screen plate are in close contact state and the mesh of both are aligned, fixed sleeve is fixedly provided on the body, movable sleeve is embedded in fixed sleeve, movable sleeve is sleeved on fixed screen plate and is fixedly connected with movable screen plate, air hole is formed in movable sleeve, inlet is formed in fixed sleeve, in cleaning mode, movable screen plate is away from fixed screen plate, and forms pressure gap. The present application is matched with fixed screen plate by movable screen plate that can be axially moved, realizes mesh alignment when processing, discharges, forms pressure gap backblowing and cleans residue when cleaning, and accurate alignment is ensured by means of guide rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of meat processing, in particular to an automatic cross-contamination prevention adjustable meat grinder for meat processing. BACKGROUND

[0002] The meat grinder is used by meat processing enterprises to process raw materials into granular meat paste of different specifications according to different process requirements. The existing meat grinder pushes the meat to the cutter through the feed screw for cutting, and then the meat is extruded out of the screen plate to complete the processing. However, in the scenario of switching different types of meat, the residues of the previous batch of meat are prone to accumulate and stay in the pores and surface of the screen plate. If the next type of meat is directly processed without thorough cleaning, it will cause cross-mixing of different meat qualities, affecting the purity and taste of the product. At present, the cleaning process requires disassembly of the screen plate, cutter and other components of the meat grinder, which is complicated and time-consuming, seriously affecting the processing efficiency.

[0003] The currently disclosed Chinese patent CN113117843B discloses an automatic adjustable meat grinder, which comprises a machine body and a processing mechanism arranged on the machine body. The processing mechanism intermittently conveys and processes the meat, and adjusts the processing area to prevent mixing of different meats when processing different meats. The processing mechanism includes an intermittent feeding structure and a multi-element movable processing structure arranged at the discharge end of the intermittent feeding structure. The meat is intermittently conveyed to the multi-element movable processing structure for processing, and the processing area of the multi-element movable processing structure is adjusted when processing different meats.

[0004] According to the above-mentioned patent, the meat is pushed to the multi-element movable processing structure for processing by the intermittent feeding structure. When processing different meats, the multi-element movable processing structure is adjusted to change the processing area, and the meat is conveyed by the intermittent feeding structure for processing. This avoids the problem of reduced meat grinding efficiency caused by the need to clean the device before processing when processing different meats.

[0005] However, the above-mentioned patent avoids cleaning but has a complex structure and occupies a large space. It takes time to switch the processing area, and is prone to failure. The switching mechanism is prone to wear and tear during long-term use, affecting reliability. Therefore, there is currently a need for an automatic cross-contamination prevention adjustable meat grinder for meat processing that does not require switching of the processing area and can automatically clean the same processing flow channel. SUMMARY

[0006] In view of the problems existing in the prior art, the application provides an automatic adjustable meat processing cross-contamination prevention mincer, which realizes the alignment of the mesh holes during processing, the formation of a pressure gap for back-blowing and slag removal during cleaning, and precise alignment with the help of guide rods.

[0007] To solve the problems in the prior art, the application provides an automatic adjustable meat processing cross-contamination prevention mincer, which comprises a body, a feed inlet and a discharge outlet arranged on the body, a feed screw, a cutter assembly and a mesh plate assembly arranged in the body, wherein the mesh plate assembly comprises a fixed mesh plate and a movable mesh plate, the fixed mesh plate is fixedly arranged at the discharge outlet end of the body, and the movable mesh plate is arranged on the outer side of the fixed mesh plate and can move axially, in the processing state, the fixed mesh plate and the movable mesh plate are in close contact and the mesh holes of the two are aligned, forming a continuous passage for the minced meat to be discharged, a fixed sleeve coaxial with the fixed mesh plate is fixedly arranged on the body, an active sleeve is embedded in the fixed sleeve, the active sleeve is sleeved on the fixed mesh plate and fixedly connected with the movable mesh plate, a linear actuator for driving the active sleeve to move is arranged on the fixed sleeve, a gas hole is arranged on the active sleeve, and an air inlet is arranged on the fixed sleeve, in the cleaning mode, the movable mesh plate is away from the fixed mesh plate, forming a pressure gap, when the fixed mesh plate and the movable mesh plate are in close contact, the pressure gap is in a closed state, when the movable mesh plate is away from the fixed mesh plate, the pressure gap is in an open state, forming an air flow channel in communication with the gas hole and the air inlet for blowing out the residual meat in the mesh hole, and a discharge outlet is arranged at the bottom of the connection between the body and the fixed sleeve, and a baffle for shielding the discharge outlet in the processing state is fixedly arranged on the active sleeve.

[0008] Preferably, a plurality of guide rods extending inwardly and parallel to the axis of the fixed sleeve are uniformly distributed along the circumferential direction of the fixed sleeve, the inwardly extending end of each guide rod is fixedly connected with the fixed mesh plate, and a guide opening is arranged on the movable mesh plate in correspondence, under the limiting action of the guide rods, the mesh holes between the fixed mesh plate and the movable mesh plate are always in alignment.

[0009] Preferably, an extension cylinder is fixedly arranged on the active sleeve, the extension cylinder passes through the fixed sleeve and extends outwardly along the axis, and is used to shield the gap between the active sleeve and the fixed sleeve.

[0010] Preferably, a drainage slope is arranged on the side of the fixed mesh plate facing the inner cavity of the body.

[0011] Preferably, the inner wall of the baffle is flush with the inner wall of the body, and a rubber block in contact with the end of the baffle is arranged on the body to seal the discharge outlet.

[0012] Preferably, the fixed mesh plate and the movable mesh plate are respectively provided with a first rubber pad and a second rubber pad on opposite sides, and when the first rubber pad and the second rubber pad are tightly attached, they form a sealed interface covering the entire bonding surface.

[0013] Preferably, the end of the machine body away from the discharge port is provided with a medium port located at the lowest part of the inner cavity, which is used to introduce compressed gas or cleaning liquid, and in the cleaning mode, the medium is introduced into the machine body to cooperate with the rotation of the feed screw to flush and push the residues out of the discharge port.

[0014] Preferably, the outside of the machine body is provided with a heating structure for heating the inside of the machine body during cleaning.

[0015] Preferably, the linear driver is a pneumatic driving structure, and the linear driver includes a gas pressure port opened on the side of the fixed sleeve opposite to the movable sleeve, and a plurality of gas pressure ports are uniformly distributed along the circumference of the fixed sleeve, and a return spring is further fixedly connected between the movable sleeve and the fixed sleeve.

[0016] Preferably, a plurality of gas holes are opened on the movable sleeve along the circumferential direction.

[0017] The beneficial effects of the present application compared with the prior art are:

[0018] 1. The mesh plate assembly composed of the fixed mesh plate and the movable mesh plate cooperates with the linear driver to realize axial attachment or separation of the fixed mesh plate and the movable mesh plate, so that the mesh holes form aligned passages for meat filling to be discharged during processing, and form a pressurized gap for air flow to blow back and clean residues during cleaning.

[0019] During the axial attachment or separation of the fixed mesh plate and the movable mesh plate, the movement of the movable mesh plate is accurately guided through the cooperation of the guide rod and the guide port on the movable mesh plate, ensuring that the movable mesh plate always maintains circumferential alignment with the fixed mesh plate during reciprocating movement, so that the mesh holes can be accurately aligned in the processing and cleaning states, thereby ensuring smooth discharge, efficient residue cleaning by air flow, avoiding blockage, leakage or cross contamination due to misalignment, and improving the hygiene, reliability and automation level of the equipment.

[0020] 2. The extension cylinder dynamically shields the annular gap between the movable sleeve and the fixed sleeve, preventing meat foam from seeping in and causing jamming or wear. Meanwhile, a drainage slope is provided on the inside of the fixed mesh plate, and a discharge port is opened at the corresponding lowest part, cooperating with the integrated baffle on the movable sleeve to realize linkage opening and closing.

[0021] During processing, the baffle covers the discharge port, the inner wall of which is flush with the inner wall of the machine body, and forms a reliable seal through the end compression rubber block to prevent leakage. During cleaning, the baffle moves away with the movable sleeve, and the discharge port is opened, so that the residues collected through the drainage slope are automatically discharged. The hygiene performance of the mesh plate assembly is improved.

[0022] 3. The application sets the first and second rubber pads on the opposite sides of the fixed and movable mesh plates respectively, when the fixed and movable mesh plates are attached in the processing state, the first and second rubber pads are pressed tightly to form a continuous sealing interface covering the entire bonding surface, effectively preventing the meat stuffing from seeping into the gap to cause residue or contamination, and buffering the rigid impact between the metal parts, reducing noise and wear.

[0023] In the cleaning mode, the movable mesh plate moves backward to separate the first and second rubber pads, and the seal is removed to provide a smooth channel for air blowing and slag discharge. While ensuring high sealing and hygiene during processing, the cleaning efficiency is also considered, improving the reliability and stability of the mesh plate assembly operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0025] Figure 2 is a partial three-dimensional structural sectional view of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0026] Figure 3 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0027] Figure 4 is a partial three-dimensional structural sectional view of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0028] Figure 5 is a partial three-dimensional structural sectional view of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0029] Figure 6 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0030] Figure 7 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0031] Figure 8 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application.

[0032] Figure 9 is a three-dimensional structural schematic diagram of a meat processing anti-cross contamination automatic adjustable meat grinder of the application. Figure 7 is an enlarged schematic diagram of A of the application.

[0033] Figure 10 is a planar cross-sectional view of a mesh plate assembly of an automatic cross-contamination prevention adjustable meat grinder in a cleaning mode according to the present application.

[0034] Figure 11 is a three-dimensional structural cross-sectional view of a mesh plate assembly of an automatic cross-contamination prevention adjustable meat grinder in a cleaning mode according to the present application.

[0035] Figure 12 is a mesh plate assembly of an automatic cross-contamination prevention adjustable meat grinder according to the present application. Figure 10 is an enlarged schematic view of B of the mesh plate assembly.

[0036] The reference signs in the figure are: 1, machine body; 11, feeding port; 12, discharging port; 13, discharging port; 14, medium port; 2, feeding screw; 3, mesh plate assembly; 31, fixed mesh plate; 311, drainage slope; 32, movable mesh plate; 33, sealing interface; 331, first rubber pad; 332, second rubber pad; 4, fixed sleeve; 41, air inlet; 42, guide rod; 43, air pressure port; 44, return spring; 441, fixed magnetic sticker; 442, movable magnetic sticker; 5, movable sleeve; 51, air hole; 52, extension cylinder; 53, baffle; 531, rubber block. DETAILED DESCRIPTION

[0037] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in combination with the accompanying drawings and specific embodiments.

[0038] Reference is made to Figures 1-6As shown, an automatic cross-contamination prevention adjustable meat grinder for meat processing includes a machine body 1, the machine body 1 is provided with a feeding port 11 and a discharging port 12, the machine body 1 is provided with a feeding screw 2, a cutter assembly and a screen plate assembly 3, wherein the screen plate assembly 3 includes a fixed screen plate 31 and a movable screen plate 32, the fixed screen plate 31 is fixedly arranged at the end of the discharging port 12 of the machine body 1, the movable screen plate 32 is movably arranged at the outer side of the fixed screen plate 31 in the axial direction, in the processing state, the fixed screen plate 31 and the movable screen plate 32 are in close contact and the screen holes of the two are aligned, forming a continuous passage for the ground meat to be discharged, the machine body 1 is fixedly provided with a fixed sleeve 4 coaxial with the fixed screen plate 31, the fixed sleeve 4 is embedded with a movable sleeve 5, the movable sleeve 5 is arranged on the fixed screen plate 31 and is fixedly connected with the movable screen plate 32, the fixed sleeve 4 is provided with a linear actuator for driving the movable sleeve 5 to move, the movable sleeve 5 is provided with an air hole 51, the fixed sleeve 4 is provided with an air inlet 41, in the cleaning mode, the movable screen plate 32 is away from the fixed screen plate 31, forming a pressurized gap, when the fixed screen plate 31 and the movable screen plate 32 are in close contact, the pressurized gap is in a closed state, when the movable screen plate 32 is away from the fixed screen plate 31, the pressurized gap is in an open state, forming an air flow channel in communication with the air hole 51 and the air inlet 41 for blowing out the residual meat in the screen holes, the bottom of the connection between the machine body 1 and the fixed sleeve 4 is provided with a discharge port 13, the movable sleeve 5 is fixedly provided with a baffle 53 for shielding the discharge port 13 in the processing state.

[0039] The reamer assembly is installed at one end of the feeding screw 2 close to the discharging port 12.

[0040] The reamer assembly is not shown in the figure.

[0041] In the automatic cross-contamination prevention adjustable meat grinder for meat processing, the screen plate assembly 3 is the key component for the final forming and discharging of the meat, and its structure design directly determines the processing efficiency and hygiene performance. The screen plate assembly 3 is composed of a fixed screen plate 31 and a movable screen plate 32, which work together to realize automatic switching between processing and self-cleaning modes under different working conditions.

[0042] In the normal processing state, the movable screen plate 32 moves inward under the action of the linear actuator until it is in close contact with the fixed screen plate 31. At this time, the screen holes of the two are accurately aligned to form a continuous and unobstructed passage. The cutter assembly cuts the meat pushed by the feeding screw 2 into meat of the required particle size and continuously pushes it to the screen plate area. Since the fixed screen plate 31 is firmly installed at the end of the discharging port 12 of the machine body 1 and the movable screen plate 32 is tightly pressed on the outside, the meat passes through the aligned screen holes smoothly under the action of the screw thrust, completing a complete meat grinding process.

[0043] When a batch of meat processing is completed, if different types of raw materials need to be replaced, the equipment automatically enters the cleaning mode. At this time, the linear actuator moves, driving the movable sleeve 5 to move the movable screen plate 32 outward along the axial direction, so that it is separated from the fixed screen plate 31, and an annular pressurized gap is formed between the two. As the movable screen plate 32 moves backward, the originally closed air flow channel is opened. The air inlet 41 on the fixed sleeve 4 is in communication with the air hole 51 on the movable sleeve 5, and forms a through path with the pressurized gap. Compressed gas enters through the air inlet 41, is sprayed into the pressurized gap through the air hole 51, and is sprayed out from the screen holes of the fixed screen plate 31 and the movable screen plate 32 in the opposite direction at high speed. The air flow has sufficient pressure and speed, which can forcefully blow away the residual meat fat embedded in the screen holes and on the surface, avoiding cross contamination of different batches of meat due to residue retention.

[0044] In the cleaning mode, compressed gas is bidirectionally sprayed from the aligned screen holes of the fixed screen plate 31 and the movable screen plate 32 through the pressurized gap: the air flow sprayed from the outside screen holes of the movable screen plate 32 directly carries the residual meat fat outward out of the body 1. The air flow sprayed from the inside screen holes of the fixed screen plate 31 is blown into the inner cavity of the body 1 in the opposite direction, washing down the meat fat embedded in the screen holes, and collecting at the discharge port 13 at the bottom of the body 1 to be discharged, thereby realizing comprehensive cleaning of the screen plate assembly 3.

[0045] In the processing state, the baffle 53 on the movable sleeve 5 moves synchronously with the movable sleeve 5, and when the movable screen plate 32 is tightly attached to the fixed screen plate 31, the baffle 53 tightly covers and completely shields the discharge port 13, preventing the leakage of meat stuffing or juice.

[0046] In the cleaning mode, the movable sleeve 5 moves away with the baffle 53, so that the discharge port 13 is opened, ensuring that the impurities sprayed inward are smoothly discharged.

[0047] When the movable screen plate 32 is completely attached to the fixed screen plate 31, the pressurized gap is closed, ensuring that there is no gas leakage or meat stuffing overflow during processing. Once separated, the pressurized gap becomes the core area of air flow diffusion and impact. The air flow acts on the inner wall of the screen hole to remove the adhering matter. The entire cleaning process does not require manual disassembly of the screen plate, nor does it need to interrupt the overall operation process. High-efficiency self-cleaning can be achieved by program-controlled air pressure on-off and displacement of the movable screen plate 32.

[0048] The meat grinder realizes continuous and clean processing of different meats in the same processing flow channel, fundamentally solving the low efficiency and cross contamination problems caused by the complicated cleaning of traditional equipment, and improving the automation level and food safety guarantee capability of meat processing.

[0049] Referring to Figures 6-12As shown, a plurality of guide rods 42 extending inwardly and parallel to the axis of the fixed sleeve 4 are evenly distributed along the circumferential direction of the fixed sleeve 4, and the inwardly extending end of each guide rod 42 is fixedly connected with the fixed mesh plate 31. The movable mesh plate 32 is provided with a corresponding guide port, and under the limiting action of the guide rod 42, the mesh holes between the fixed mesh plate 31 and the movable mesh plate 32 are always in a registered state.

[0050] When the linear driver drives the movable mesh plate 32 to move axially, the guide rod 42 is always inserted into the corresponding guide port, accurately constraining the movement track of the movable mesh plate 32. This guide structure ensures that the movable mesh plate 32 does not deviate or tilt circumferentially during the process of approaching or moving away from the fixed mesh plate 31, so that the mesh holes on it are always accurately registered with the mesh holes of the fixed mesh plate 31.

[0051] Whether in the processing state where the two mesh plates are tightly attached to form a continuous discharging channel, or in the cleaning state where they are separated to form a pressure-filled gap, the alignment relationship of the mesh holes is maintained, which not only ensures smooth discharge of the meat filling, but also ensures that the reverse airflow can accurately pass through the mesh holes to achieve efficient slag cleaning, effectively avoiding the problems of blockage, leakage or cleaning failure caused by misalignment.

[0052] Referring to Figures 7-12 As shown, the movable sleeve 5 is fixedly provided with an extension cylinder 52 which penetrates the fixed sleeve 4 and extends axially outward to shield the gap between the movable sleeve 5 and the fixed sleeve 4.

[0053] During the operation of the meat grinder, the movable sleeve 5 moves axially along with the movable mesh plate 32, and the extension cylinder 52 fixedly arranged thereon penetrates the corresponding opening on the fixed sleeve 4 and continuously extends outward. The outer diameter of the extension cylinder 52 is tightly matched with the fixed sleeve 4, thereby forming a dynamic shielding barrier between the movable sleeve 5 and the fixed sleeve 4.

[0054] When the device is in the processing state, the extension cylinder 52 covers the annular gap between the two, effectively preventing the extruded meat from penetrating into the gap and affecting the movement of the movable sleeve 5. In the cleaning state, even if the movable sleeve 5 moves backward to form a displacement, the extension cylinder 52 still remains shielding to avoid the residual meat particles from being stuck in the sliding fit surface between the movable sleeve 5 and the fixed sleeve 4. Not only does it prevent the movement from being stuck or worn due to the accumulation of impurities, but it also maintains the sealing and smooth operation of the driving system, ensuring the long-term reliable operation of the linear driver.

[0055] Referring to Figure 9 and Figure 12 As shown, the fixed mesh plate 31 is provided with a drainage slope 311 on the side facing the inner cavity of the machine body 1.

[0056] The drainage slope 311 on the side of the fixed mesh plate 31 facing the inner cavity of the machine body 1 is inclined, gradually lowering from the periphery of the fixed mesh plate 31 to the center of the bottom, for guiding the residual meat and cleaning medium blown from the mesh holes during cleaning to the lowest point.

[0057] In the normal processing state, the movable sleeve 5 drives the fixed baffle 53 to move to the discharge port 13, so that the baffle 53 tightly covers and completely shields the discharge port 13, preventing the leakage of meat or juice from the discharge port 13 during the mincing process, and ensuring the processing sealing.

[0058] When the device enters the cleaning mode and the movable mesh plate 32 moves backward, the movable sleeve 5 synchronously drives the baffle 53 away from the discharge port 13, so that it is opened. At this time, the residues collected through the drainage slope 311 are smoothly discharged outside the machine through the discharge port 13 under the push of airflow or flushing medium, realizing automatic slagging. Through the linkage opening and closing of the baffle 53 and the discharge port 13, the cleaning and waste discharge are efficiently completed while ensuring the processing sealing, improving the automation and hygiene performance of the device.

[0059] Referring to Figure 9 and Figure 12 , the inner wall of the baffle 53 is flush with the inner wall of the machine body 1, and the machine body 1 is provided with a rubber block 531 in contact with the end of the baffle 53 for sealing the discharge port 13.

[0060] During the operation of the meat grinder, the baffle 53 moves synchronously with the movable sleeve 5, and its inner wall is always flush with the inner wall of the machine body 1, ensuring that there is no step or concave-convex obstruction when the material flows in the cavity, avoiding the accumulation of meat foam at this point.

[0061] When the device is in the processing state, the baffle 53 moves to the position of the discharge port 13, and its end is tightly pressed on the rubber block 531 provided on the inner side of the machine body 1. The rubber block 531 has elastic deformation ability and fills the small gap between the baffle 53 under the pressure of the baffle 53, forming a reliable sealing interface 33, effectively preventing the leakage of meat, juice or compressed gas from the discharge port 13.

[0062] Referring to Figures 6-12 , the opposite sides of the fixed mesh plate 31 and the movable mesh plate 32 are respectively provided with a first rubber pad 331 and a second rubber pad 332. When the first rubber pad 331 and the second rubber pad 332 are tightly attached, they form a sealing interface 33 covering the entire joint surface.

[0063] When the meat grinder enters the processing state, the movable screen plate 32 moves axially under the push of the linear drive towards the fixed screen plate 31 until the two are tightly attached. At this time, the first rubber pad 331 and the second rubber pad 332 respectively arranged on the opposite sides of the fixed screen plate 31 and the movable screen plate 32 are in full contact and pressed, forming a continuous sealing interface 33 covering the entire bonding surface. It effectively prevents the meat stuffing from seeping into the gap between the two screen plates during high-pressure pushing, prevents residues from being stuck or breeding bacteria, and at the same time buffers the rigid collision between metal parts, reducing operating noise and wear.

[0064] When the device switches to the cleaning mode, the movable screen plate 32 moves backward, the first rubber pad 331 and the second rubber pad 332 are separated, and the sealing state is released, providing a channel for subsequent airflow back blowing and residue discharge. While ensuring the processing sealing and hygiene, it also improves the durability and smooth operation of the screen plate assembly 3.

[0065] Referring to Figure 2 , Figure 5 , Figure 8 and Figure 11 , the end of the machine body 1 away from the discharge port 12 is provided with a medium port 14 at the lowest part of the inner cavity, which is used to introduce compressed gas or cleaning liquid. In the cleaning mode, the medium is introduced into the machine body 1 to cooperate with the rotation of the feed screw 2 to flush and push the residues out of the discharge port 13.

[0066] When the meat grinder enters the cleaning mode, the medium port 14 is opened to introduce compressed gas or cleaning liquid. After the medium enters, the feed screw 2 is started to rotate synchronously, driving the medium to flow along the inner wall of the machine body 1 and the surface of the meat grinder assembly, flushing and stirring the residual meat, oil and impurities.

[0067] Under the pushing action of the screw, the stripped residues and the medium are mixed and gradually collected at the bottom of the machine body 1, then slide along the drainage slope 311 on the side of the fixed screen plate 31, and finally discharged outside through the opened discharge port 13. It realizes the overall flushing and automatic residue discharge of the inside of the meat grinding cavity without manual disassembly, improving the cleaning efficiency and the sanitary level of the equipment.

[0068] Referring to Figures 1-3 , the outside of the machine body 1 is provided with a heating structure for heating the inside of the machine body 1 during cleaning.

[0069] The heating structure is not shown in the figure.

[0070] During the cleaning process, the heating structure located on the outside of the machine body 1 is activated to evenly heat the interior of the machine body 1. This effectively reduces the viscosity of residual grease, making it easier for it to be emulsified by the cleaning liquid or blown away from the inner wall by the airflow. At the same time, when using the cleaning liquid, heating also increases the liquid temperature, enhances the cleaning power, and accelerates the subsequent drying process, preventing moisture retention and bacterial growth.

[0071] Furthermore, in airflow cleaning mode, heating prevents meat fat from solidifying and clogging the mesh or discharge channels at low temperatures, ensuring thorough and efficient cleaning. The entire heating process works in conjunction with media flushing, screw rotation, and slag discharge, further enhancing the reliability and hygiene standards of the equipment's self-cleaning mechanism.

[0072] See Figure 9 and Figure 12 As shown, the linear actuator is a pneumatic drive structure. The linear actuator includes an air pressure port 43 on the side of the fixed sleeve 4 facing the movable sleeve 5. Multiple air pressure ports 43 are evenly distributed on the fixed sleeve 4 along its circumference. A return spring 44 is also fixedly connected between the movable sleeve 5 and the fixed sleeve 4.

[0073] The fixed sleeve 4 is provided with a fixed magnet 441, and the movable sleeve 5 is provided with a movable magnet 442. When the fixed magnet 441 and the movable magnet 442 attract each other, they together with the return spring 44 form a double positioning structure for the movable sleeve 5.

[0074] During the operation of the meat grinder, the linear actuator controls the axial movement of the movable sleeve 5 pneumatically. When compressed air enters through multiple air pressure ports 43 evenly distributed along the circumference of the fixed sleeve 4, the air pressure acts on the end face of the movable sleeve 5, pushing it to move inward against the elastic force of the return spring 44, thus driving the movable mesh plate 32 closer to the fixed mesh plate 31 and entering the processing state.

[0075] In cleaning mode, the air pressure is unloaded, the return spring 44 releases its stored energy, and pushes the movable sleeve 5 back, causing the movable mesh plate 32 to move away from the fixed mesh plate 31. During this reset process, the movable magnet 442 and the fixed magnet 441 attract each other, generating a magnetic locking effect, which, together with the return spring 44, forms a dual positioning structure, improving the stability of the movable mesh plate 32 in cleaning mode.

[0076] See Figure 12 As shown, the movable sleeve 5 has a plurality of air holes 51 along its circumference.

[0077] The plurality of air holes 51 evenly arranged on the movable sleeve 5 in the circumferential direction are communicated with the air inlet 41 on the fixed sleeve 4 in the cleaning mode, so that the compressed gas can enter through the air inlet 41 and be evenly distributed to the pressure charging gap between the movable mesh plate 32 and the fixed mesh plate 31, thereby realizing omnidirectional and high-efficiency reverse blowing of the mesh hole area and ensuring that the residual meat is completely removed.

[0078] The mesh plate assembly 3 composed of the fixed mesh plate 31 and the movable mesh plate 32 is matched with the linear driver to realize axial adhesion or separation of the two. When adhered, the mesh holes are aligned to form a material discharging passage, and when separated, the pressure charging gap is formed for airflow back blowing to remove slag. Through the cooperation of the guide rod 42 and the guide opening on the movable mesh plate 32, it is ensured that the mesh holes are always accurately aligned in the circumferential direction during reciprocating motion, avoiding blockage or leakage caused by misalignment.

[0079] An extension cylinder 52 is arranged on the movable sleeve 5 to dynamically shield the annular gap between the movable sleeve 5 and the fixed sleeve 4, preventing meat from seeping in and causing jamming. The inner side of the fixed mesh plate 31 is provided with a drainage slope 311, and a material discharging opening 13 is arranged at the lowest position and is linked and opened and closed by the baffle 53 on the movable sleeve 5. During processing, the baffle 53 presses the rubber block 531 and keeps the inner wall flush, realizing reliable sealing, and during cleaning, the baffle 53 is moved away, so that the residual material is automatically discharged through the drainage slope 311.

[0080] Meanwhile, the first rubber pad 331 and the second rubber pad 332 are arranged on the opposite sides of the fixed mesh plate 31 and the movable mesh plate 32 respectively, forming a full-covering sealing interface 33 when adhered, blocking the meat stuffing from seeping in and buffering the impact, and releasing the sealing when separated, ensuring smooth airflow. The functions of guiding, sealing, slag discharging and self-cleaning are integrated, improving the hygiene, operation stability and automation level of the equipment.

[0081] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An automatic cross-contamination prevention adjustable meat grinder for meat processing, comprising a machine body, a feed inlet and a discharge outlet are arranged on the machine body, a feed screw, a cutter assembly and a screen assembly are arranged in the machine body; characterized in that The screen assembly comprises a fixed screen and a movable screen; The fixed screen is fixedly arranged at the discharge outlet end of the machine body; The movable screen is movably arranged outside the fixed screen in the axial direction; In the processing state, the fixed screen and the movable screen are in close contact and the screen holes of the two are aligned, forming a continuous passage for the ground meat to be discharged; A fixed sleeve coaxial with the fixed screen is fixedly arranged on the machine body, an movable sleeve is embedded in the fixed sleeve, the movable sleeve is sleeved on the fixed screen and fixedly connected with the movable screen, a linear actuator for driving the movable sleeve to move is arranged on the fixed sleeve; Air holes are arranged on the movable sleeve, and air inlets are arranged on the fixed sleeve; In the cleaning mode, the movable screen is away from the fixed screen, forming a pressurized gap; When the fixed screen and the movable screen are in close contact, the pressurized gap is in a closed state; When the movable screen is away from the fixed screen, the pressurized gap is in an open state, forming an air flow channel in communication with the air holes and the air inlets for blowing out the residual meat in the screen holes; A discharge port is arranged at the bottom of the connection between the machine body and the fixed sleeve, and a baffle for shielding the discharge port in the processing state is fixedly arranged on the movable sleeve; A plurality of guide rods extending inward and parallel to the axis of the fixed sleeve are uniformly distributed in the circumferential direction of the fixed sleeve, and the inward extending end of each guide rod is fixedly connected with the fixed screen, and a guide hole is correspondingly arranged on the movable screen, and under the limiting action of the guide rods, the screen holes between the fixed screen and the movable screen are always in alignment; A drainage slope is arranged on the side of the fixed screen facing the inner cavity of the machine body; A medium port is arranged at the lowest position of the inner cavity of the machine body away from the discharge outlet, and the medium port is used to introduce compressed gas or cleaning liquid, and in the cleaning mode, the medium is introduced into the machine body to cooperate with the rotation of the feed screw to flush and push the residual material out of the discharge port.

2. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, An extension cylinder is fixedly arranged on the movable sleeve, the extension cylinder passes through the fixed sleeve and extends outward in the axial direction, and is used to shield the gap between the movable sleeve and the fixed sleeve.

3. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, The inner wall of the baffle is flush with the inner wall of the machine body, and a rubber block in contact with the end of the baffle is arranged on the machine body to seal the discharge port.

4. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, First and second rubber pads are arranged on the opposite sides of the fixed screen and the movable screen respectively, and when the first and second rubber pads are in close contact, they form a sealing interface covering the entire joint surface.

5. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, A heating structure is arranged on the outside of the machine body to heat the inside of the machine body during cleaning.

6. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, The linear actuator is a pneumatic driving structure, the linear actuator comprises a gas pressure port arranged on the side of the fixed sleeve opposite to the movable sleeve, a plurality of gas pressure ports are uniformly distributed in the circumferential direction of the fixed sleeve, and a return spring is further fixedly connected between the movable sleeve and the fixed sleeve.

7. The automatic cross-contamination prevention adjustable meat grinder for meat processing according to claim 1, characterized in that, A plurality of air holes are arranged on the movable sleeve in the circumferential direction thereof.

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