A beef marinating device for processing beef
By using a tree-like hole structure composed of a hollow main needle and a solid secondary needle, along with servo cylinder-controlled injection technology, the problem of uneven marinade penetration is solved, achieving uniformity and efficient utilization in beef marinating.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SICHUAN LINSHANGHAO FOOD CO LTD
- Filing Date
- 2026-05-26
- Publication Date
- 2026-07-24
Smart Images
Figure CN122439718A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of beef marinating apparatus technology, and more specifically, to a beef marinating apparatus for processing beef. Background Technology
[0002] Marinating beef is a crucial step in enhancing its texture and flavor during cooking. Mass processing of beef utilizes a marinating injection machine. Its working principle involves placing large, pre-processed pieces of beef on an automatic conveyor belt and feeding them into the injection area of the machine. The prepared marinade is pressurized by a high-pressure pump and transported through pipes to a needle plate device filled with injection needles. Rows of hollow needles pierce the meat, injecting the high-pressure marinade directly into the deep muscle fibers. After injection, the meat is sent to a vacuum tumbler or sealing device for further processing. The injected marinade flows and diffuses within the gaps in the muscle fibers, improving the uniformity of flavor throughout the beef.
[0003] Existing beef marinating injection machines use multiple needles to pierce the meat block, leaving multiple rows of vertical needle holes. Due to the dense muscle fibers and strong fascia barrier of beef, the penetration resistance of multiple rows of vertical single holes is large. The marinade can only slowly diffuse outwards from a single hole point. The distance between two needle holes is relatively large, and the muscle fibers between two needle holes still cannot penetrate into the marinade. This results in a large difference in flavor between different areas of the meat block. Even after subsequent vacuum sealing and tumbling processing, the flavor inside the beef is still inconsistent. Furthermore, because muscle fibers are elastic, the pressure difference during the injection process causes the marinade to overflow rapidly from the gap between the needle and the muscle fibers. Very little marinade remains in the needle hole, resulting in low utilization of the marinade. This can also lead to a situation where the inside of the beef tastes bland while the surface tastes salty.
[0004] Therefore, this application proposes a beef marinating apparatus for processing beef to solve the above-mentioned problems. Summary of the Invention
[0005] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a beef marinating device for processing beef, which solves the above-mentioned problems.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a beef marinating device for processing beef, comprising a shell and a support chain conveyor installed at the bottom of the shell, wherein a pressing and injecting mechanism is installed inside the shell; The injection mechanism includes a needle plate installed inside the housing, and a hollow main needle is threaded to the bottom of the needle plate. The bottom of the hollow main needle is symmetrically provided with injection holes. The hollow main needle has symmetrically provided limiting holes on its outer side. Solid auxiliary needles are slidably connected inside the limiting holes. The tail ends of the two solid auxiliary needles are rotatably connected to a pressure sleeve. A limiting wedge sleeve is fixedly connected inside the hollow main needle. The hollow main needle is internally slidably connected to an injection tube, which is fixed to the lower pressure sleeve. The lower pressure sleeve is slidably installed inside the hollow main needle, and the injection tube and the limiting wedge sleeve are slidably arranged.
[0007] In a new embodiment, the solid auxiliary needles are provided in two groups, with two solid auxiliary needles in each group, and the four solid auxiliary needles are arranged in a cross-shaped staggered arrangement.
[0008] In a new embodiment, the inclined surfaces of both the limiting hole and the limiting wedge sleeve are 30°, and the bottom surface of the limiting hole and the inclined surface of the limiting wedge sleeve are flush. After the hollow main needle pierces the meat block, leaving a main hole, the injection tube drives the lower pressure sleeve to slide down. The tip of the solid secondary needle and the inclined surface of the limiting wedge sleeve collide and deflect, and punch out from the limiting hole along the inclined surface of the limiting wedge sleeve. The solid secondary needle with potential energy pierces the inclined micro-minor holes inside the muscle fibers of the meat block. The main hole and multiple micro-minor holes form a tree-like hole structure.
[0009] In a new embodiment, a servo cylinder A is fixedly connected to the top of the housing, and the bottom end of the rod of the servo cylinder A is fixedly connected to the needle plate. The inner wall of the housing is symmetrically equipped with a servo compiler for detecting the depth of the hollow main needle piercing the meat block. The outer side of the needle plate is symmetrically equipped with a punching mechanism that controls the punching out and retraction of the solid auxiliary needle.
[0010] In a new embodiment, the punching mechanism includes B servo cylinders symmetrically mounted on the outside of the needle plate; The punching mechanism also includes a distribution network fixedly connected to the top of the injection pipe, and a storage device is installed on the outside of the housing. The distribution network and the storage device are connected by a hose. A lifting plate is fixedly installed on the top of the distribution network, and a hinge seat is symmetrically fixedly connected to the top of the lifting plate. A rotating rod is symmetrically installed between the top of the rod of the B servo cylinder and the hinge seat. The rod of the A servo cylinder and the lifting plate are slidably arranged.
[0011] In a new embodiment, a pressing mechanism for locating the injection hole position of the meat block is installed below the needle plate; The pressing mechanism includes slide rods slidably mounted at the four corners of the needle plate, a pressing plate fixedly connected to the bottom of the slide rod, a spring installed between the needle plate and the pressing plate, and the spring sleeved on the outside of the slide rod; The extrusion plate has slots that are the same number and position as the hollow main needles; The bottom of the extrusion plate is equipped with a blocking mechanism to reduce marinade overflow and waste.
[0012] In a new embodiment, the blocking mechanism includes a hollow cover fixedly installed at the bottom of the extrusion plate, the hollow cover and the slot on the outside of the extrusion plate being positioned correspondingly; The hollow cover has a flow guide groove on its inner wall, and a filter screen is fixedly connected inside the flow guide groove; An atomizing nozzle is fixedly connected to the outside of the hollow hood.
[0013] In a new embodiment, the hollow cover has an A injection hole and a B injection hole inside, the radius of the A injection hole is larger than the radius of the B injection hole, and the B injection hole is connected to the atomizing nozzle. When the meat is injected with marinade, a large amount of marinade overflows from the top of the main hole due to the pressure difference and the squeezing of the meat by the extrusion plate. The overflowing marinade passes through the guide groove on the inner wall of the hollow cover in sequence through the A injection hole and the B injection hole, and is then pressurized and sprayed onto the outer surface of the meat from the atomizing nozzle. A rubber ring is fixedly connected to the bottom of the hollow cover.
[0014] Beneficial effects: Compared with the prior art, the advantages of this invention are: 1. After the hollow main needle penetrates the meat block, the solid secondary needles, which have potential energy, pierce multiple secondary holes around the main hole formed by the hollow main needle piercing the meat block. The main hole and multiple secondary holes form a tree-like hole structure. The tree-like holes are densely distributed inside the muscle fibers. When the marinade enters through the main hole, it automatically diverts and spreads in three dimensions—horizontally, longitudinally, and obliquely—along the already formed main and secondary hole channels, forming multiple flavor-absorbing networks inside the meat block. This changes the slow diffusion from a single point to multi-point synchronous penetration, increasing the diffusion speed of the marinade inside the muscle fibers and accelerating the marinating and flavor absorption of the meat block. At the same time, it improves the uniformity of the marinating and flavor absorption of the meat block. 2. The solid secondary needle pierces the muscle fibers at a 30° angle. The needle tip slides into the gaps between the muscle fibers at a 30° angle, making the needle insertion easier, less prone to bending, and less likely to break the meat. The angled insertion lengthens the marinade channel, allowing the marinade to penetrate a longer path and cover a wider area. The 30° angled piercing laterally stretches the fibers, and after rebounding, it still retains micro-gaps, making the channels less likely to close. The marinade can remain for a long time and continue to penetrate. The 30° secondary hole has an angled retention effect, locking the marinade from flowing out quickly and allowing it to slowly infiltrate between the fiber layers. 3. During the injection process, the marinade sprayed from the main hole is filtered through the filter screen on the inner wall of the hollow cover and stored inside the hollow cover. After being pressurized through injection holes B and A, the marinade is sprayed at high speed onto the outer surface of the meat pieces through the atomizing nozzle. The excess material is recycled to improve the utilization rate of the marinade and to ensure that the marinade is evenly absorbed into the meat pieces on both the inside and outside. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the injection mechanism and the punching mechanism of the present invention; Figure 3 This is a schematic diagram of the connection structure between the hollow main needle and the injection tube of the present invention; Figure 4 This is a schematic diagram of the connection structure between the hollow main needle and the solid auxiliary needle of the present invention; Figure 5 This is a schematic diagram of the internal structure of the hollow main needle of the present invention; Figure 6 This is a schematic diagram of the connection structure between the extrusion plate and the blocking mechanism of the present invention; Figure 7 This is a schematic diagram of the hollow cover of the present invention; Figure 8 This is a schematic diagram of the internal structure of the hollow cover of the present invention; Figure 9 This is a side view of the present invention.
[0016] The attached diagram is labeled as follows: 1. Shell; 2. Support chain conveyor; 3. Injection mechanism; 31. Needle plate; 32. Hollow main needle; 33. Limiting hole; 34. Solid auxiliary needle; 35. Lower pressure sleeve; 36. Limiting wedge sleeve; 37. Injection tube; 4. A servo cylinder; 5. Servo compiler; 6. Punching mechanism; 61. B servo cylinder; 62. Distribution pipeline; 63. Storage container; 64. Lifting plate; 65. Hinge seat; 66. Rotating rod; 7. Pressing mechanism; 71. Slide rod; 72. Pressing plate; 73. Spring; 8. Blocking mechanism; 81. Hollow cover; 82. Flow guide channel; 83. Filter screen; 84. Atomizing nozzle; 9. Injection hole A; 10. Injection hole B; 11. Rubber ring. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.
[0018] This application provides a beef marinating device for processing beef, which solves the technical problem of existing marinade injection machines that use multiple rows of needles to pierce multiple rows of vertical single holes inside the meat block. The single hole has high penetration resistance, and the marinade can only slowly diffuse outward from a single hole point. The distance between two needle holes is also large, and the muscle fibers between the two needle holes still cannot penetrate into the marinade, resulting in large differences in flavor in different areas of the meat block.
[0019] Example 1: Please refer to Figure 1 - Figure 5 A beef marinating device for processing beef includes a housing 1 and a support chain conveyor 2 installed at the bottom of the housing 1. A pressing and injecting mechanism 3 is installed inside the housing 1. The injection mechanism 3 includes a needle plate 31 installed inside the housing 1. A hollow main needle 32 is threadedly connected to the bottom of the needle plate 31. Injection holes are symmetrically opened at the bottom of the hollow main needle 32. A limiting hole 33 is symmetrically opened on the outer side of the hollow main needle 32. A solid auxiliary needle 34 is slidably connected inside the limiting hole 33. The tail ends of the two solid auxiliary needles 34 are rotatably connected to a pressing sleeve 35. A limiting wedge sleeve 36 is fixedly connected inside the hollow main needle 32. The hollow main needle 32 is internally slidably connected to an injection tube 37. The injection tube 37 and the lower pressure sleeve 35 are fixed. The lower pressure sleeve 35 is slidably installed inside the hollow main needle 32. The injection tube 37 and the limiting wedge sleeve 36 are slidably set.
[0020] Specifically, the working principle of the injection mechanism 3 is as follows: The support chain conveyor 2 transports the meat block to the injection area inside the housing 1. The needle plate 31 drives the hollow main needle 32 at its bottom to descend and pierce the meat block, leaving a main hole. After that, the injection tube 37 drives the fixed pressure sleeve 35 to slide down inside the hollow main needle 32. When the solid auxiliary needle 34 and the inclined surface of the limiting wedge sleeve 36, which are symmetrically installed inside the pressure sleeve 35, come into contact, the solid auxiliary needle 34 deflects slightly and punches out of the limiting hole 33 along the inclined surface of the limiting wedge sleeve 36, leaving an auxiliary hole in the meat block near the main hole.
[0021] Please see Figure 4 As a preferred embodiment of the present invention, there are two sets of solid auxiliary needles 34, with two solid auxiliary needles 34 in each set, and the four solid auxiliary needles 34 are arranged in a cross-shaped staggered arrangement.
[0022] In this embodiment, four solid auxiliary needles 34 leave four auxiliary holes around the main hole pierced by the hollow main needle 32, increasing the number of penetration holes for the marinade.
[0023] Please see Figure 5 As a preferred embodiment of the present invention, the inclined surfaces of both the limiting hole 33 and the limiting wedge sleeve 36 are 30°, and the bottom surface of the limiting hole 33 and the inclined surface of the limiting wedge sleeve 36 are flush. When the hollow main needle 32 pierces the meat block and leaves a main hole, the injection tube 37 drives the lowering sleeve 35 to slide down. The tip of the solid auxiliary needle 34 and the inclined surface of the limiting wedge sleeve 36 collide and deflect, and punch out from the limiting hole 33 along the inclined surface of the limiting wedge sleeve 36. The solid auxiliary needle 34 with potential energy pierces the inclined micro-minor holes inside the muscle fibers of the meat block. The main hole and multiple micro-minor holes form a tree-like hole structure.
[0024] In this embodiment, due to the dense muscle fibers and strong fascia barrier of beef, the solid secondary needle 34 pierces the muscle fibers at a 30° angle. The needle tip slides into the gaps between the muscle fibers at a 30° angle, making the needle insertion easier, less prone to bending, and less likely to break the meat. The angled insertion lengthens the infiltration channel, resulting in a longer and wider penetration path for the marinade. The 30° angled piercing causes the fibers to be stretched laterally, and micro-gaps are retained after rebound. The channels are not easy to close, allowing the marinade to remain for a long time and continue to penetrate. The 30° secondary hole has an angled retention effect, locking the marinade from rapid leakage and allowing it to slowly infiltrate between the fiber layers.
[0025] Please see Figure 1 and Figure 9 As a preferred embodiment of the present invention, a servo cylinder 4 is fixedly connected to the top of the housing 1, and the bottom end of the rod of the servo cylinder 4 is fixedly connected to the needle plate 31. The inner wall of the housing 1 is symmetrically equipped with a servo compiler 5 for detecting the depth of the hollow main needle 32 piercing the meat block.
[0026] In this embodiment, servo cylinder A 4 is used to drive the needle plate 31 fixed on the rod to descend inside the housing 1. The downward pressure causes the hollow main needle 32 to pierce the meat block smoothly. Servo compiler 5 is used to measure the thickness of the meat block and control the stroke of the rod of servo cylinder A 4 according to the thickness of the meat block, so that the piercing depth of the hollow main needle 32 is controlled at 70% to 85% of the thickness of the meat block, preventing the hollow main needle 32 from directly piercing the meat block, which would cause the marinade to be discharged directly from the hollow main needle 32 during injection, and the meat block would not achieve the marinating effect.
[0027] Please see Figure 1 - Figure 3 As a preferred embodiment of the present invention, a punching mechanism 6 for controlling the punching out and retraction of the solid auxiliary needle 34 is symmetrically installed on the outer side of the needle plate 31. The punching mechanism 6 includes B servo cylinders 61 symmetrically installed on the outer side of the needle plate 31. The punching mechanism 6 also includes a distribution network 62 fixedly connected to the top of the injection pipe 37, and a storage device 63 is installed on the outside of the housing 1. The distribution network 62 and the storage device 63 are connected by a hose. A lifting plate 64 is fixedly installed on the top of the distribution network 62. A hinge seat 65 is symmetrically fixedly connected to the top of the lifting plate 64. A rotating rod 66 is symmetrically installed between the top of the rod of the B servo cylinder 61 and the hinge seat 65. The rod of servo cylinder 4 and the lifting plate 64 are slidably arranged.
[0028] Specifically, the working principle of the injection mechanism 3 is as follows: After the hollow main needle 32 pierces the meat block, the B servo cylinder 61 drives its rod to rise. During this process, the rotating rod 66 connected to the rod rotates in the hinge seat 65 at the top of the lifting plate 64. Due to the rotation of the rotating rod 66, the rotating rod 66 drives the lifting plate 64 to descend slightly. The descending lifting plate 64 drives the bottom-fixed injection tube 37 to slide down inside the hollow main needle 32. The sliding injection tube 37 drives the lowering sleeve 35 to slide inside the hollow main needle 32, thereby causing the tip of the solid auxiliary needle 34 to abut against the limiting wedge sleeve 36 and punch out from the limiting hole 33 along the inclined surface of the limiting wedge sleeve 36, leaving a micro-minor hole inside the meat block. After the solid auxiliary needle 34 with potential energy punches out and leaves a micro auxiliary hole around the main hole inside the meat block, the B servo cylinder 61 drives its rod to descend, and the rotating rod 66 drives the lifting plate 64 to rise. As the lower pressure sleeve 35 rises, the solid auxiliary needle 34 inside the lower pressure sleeve 35 slides in the limiting hole 33 outside the hollow main needle 32 and retracts into the interior of the hollow main needle 32. Subsequently, the storage container 63 pressurizes the marinade inside and causes the marinade inside the storage container 63 to enter the distribution network 62 through the hose. The marinade then enters the hollow main needle 32 through the injection pipe 37 and is discharged from the injection hole at the bottom of the hollow main needle 32. The marinade continuously spreads from the main hole to the secondary hole.
[0029] Please see Figure 2 As a preferred embodiment of the present invention, a pressing mechanism 7 for positioning the injection hole position of the meat block during the injection process is installed below the needle plate 31. The pressing mechanism 7 includes slide rods 71 that are slidably installed at the four corners of the needle plate 31. A pressing plate 72 is fixedly connected to the bottom of the slide rods 71. A spring 73 is installed between the needle plate 31 and the pressing plate 72. The spring 73 is sleeved on the outside of the slide rods 71. The extrusion plate 72 has the same number of slots as the hollow main needle 32 and corresponding in position.
[0030] In this embodiment, during the descent of the needle plate 31 fixed to the drive rod of the A servo cylinder 4, the extrusion plate 72 below the needle plate 31 first contacts the upper surface of the meat block. As the needle plate 31 continues to descend, the slide rod 71 fixed to the top of the extrusion plate 72 slides at the four corners of the needle plate 31. At the same time, the spring 73 is in a compressed state. The extrusion plate 72 can press down to fix the meat block at the top of the support chain conveyor 2, and cooperate with the hollow main needle 32 to achieve positioning and puncture. After the meat chunks are filled, the needle plate 31 fixed to the drive rod of the A servo cylinder 4 is lifted. At this time, the compressed spring 73 is released until the extrusion plate 72 is fully reset. The elastic force generated by the spring 73 driving the extrusion plate 72 can help the meat chunks pierced by the hollow main needle 32 fall off, preventing the hollow main needle 32 from lifting the meat chunks when it rises. The meat chunks cannot fall onto the support chain conveyor 2 to complete the conveying process.
[0031] Working principle: In the first step, the support chain conveyor 2 transports the meat block to the injection area inside the housing 1. The servo compiler 5 detects the thickness of the meat block and sets the depth to which the hollow main needle 32 pierces the meat block, with the piercing depth controlled between 70% and 85%. In the second step, the needle plate 31 connected to the drive rod of the A servo cylinder 4 descends, the extrusion plate 72 contacts the upper surface of the meat block, and the hollow main needle 32 penetrates through the slot on the outside of the extrusion plate 72. The hollow main needle 32 pierces the meat block and forms a main hole inside the meat block until it pierces 70% to 85% of the thickness of the meat block. During this process, the lifting plate 64 descends synchronously with the needle plate 31. The B servo cylinder 61 drives its rod to extend, and the two rotating rods 66 installed at the driving end of the B servo cylinder 61 rotate inside the hinge seat 65, and the lifting plate 64 drives the injection tube 37 to descend. The injection tube 37 drives the outer fixed pressure sleeve 35 to slide down inside the hollow main needle 32 until the solid auxiliary needle 34 and the inclined surface of the limiting wedge sleeve 36 inside the hollow main needle 32 come into contact. The solid auxiliary needle 34 punches out from the limiting hole 33 along the inclined surface of the limiting wedge sleeve 36 and forms a secondary hole around the inner wall of the main hole of the meat block. After that, the injection tube 37 drives the pressure sleeve 35 to slide up and reset. The sliding pressure sleeve 35 drives the solid auxiliary needle 34 to deflect and retract into the interior of the hollow main needle 32. The third step is that the storage container 63 on the outside of the shell 1 pressurizes the internal marinade. The marinade enters the distribution network 62 from the hose and is injected into the bottom of the main hole from the injection hole at the lower end of the hollow main needle 32. Part of the marinade inside the main hole fills the secondary hole along the gap between the hollow main needle 32 and the muscle fibers. The marinade diffuses along multiple points in the main hole and the secondary hole. In the fourth step, the needle plate 31 fixed to the drive rod of the A servo cylinder 4 is lifted and reset, the extrusion plate 72 and the meat block are separated, the spring 73 drives the extrusion plate 72 to rebound, assisting the separation of the hollow main needle 32 and the meat block, and the support chain conveyor 2 continues to transport the meat block to the discharge port of the shell 1.
[0032] Example 2: Please refer to Figure 6 - Figure 8 This embodiment provides a technical solution for a beef marinating device for processing beef based on embodiment one: a blocking mechanism 8 for reducing marinade overflow and waste is installed at the bottom of the extrusion plate 72. The blocking mechanism 8 includes a hollow cover 81 fixedly installed at the bottom of the extrusion plate 72, and the hollow cover 81 corresponds to the slot on the outside of the extrusion plate 72. The inner wall of the hollow cover 81 is provided with a flow guide groove 82, and a filter screen 83 is fixedly connected inside the flow guide groove 82; Atomizing nozzle 84 is fixedly connected to the outside of the hollow cover 81.
[0033] In this embodiment, when the meat block is injected with marinade, a large amount of marinade overflows from the top of the main hole due to the pressure difference and the squeezing of the meat block by the extrusion plate 72. The overflowing marinade enters from the guide groove 82 on the inner wall of the hollow cover 81. The overflowing marinade collected by the guide groove 82 is then sprayed onto the outer surface of the meat block from the atomizing nozzle 84. The marinade contains spices, and the filter screen 83 can filter particulate matter to prevent a large amount of spices from entering the hollow cover 81, thereby preventing the hollow cover 81 and the atomizing nozzle 84 from becoming clogged.
[0034] Please see Figure 7 - Figure 8 As a preferred embodiment of the present invention, the hollow cover 81 has an A injection hole 9 and a B injection hole 10 inside. The radius of the A injection hole 9 is larger than the radius of the B injection hole 10. The B injection hole 10 is connected to the atomizing nozzle 84. A rubber ring 11 is fixedly connected to the bottom of the hollow cover 81.
[0035] In this embodiment, after the marinade is filtered by the filter screen 83 of the guide channel 82, it passes through the A injection hole 9 and the B injection hole 10 in sequence. Since the radius of the A injection hole 9 is larger than the radius of the B injection hole 10, the flow rate of the marinade is increased by the gradually changing flow channels of the A injection hole 9 and the B injection hole 10, so that the marinade is sprayed out at high speed from the atomizing nozzle 84, thereby increasing the spraying area of the marinade and improving the marinating effect on the surface of the meat.
[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A beef marinating apparatus for processing beef, comprising a housing (1) and a support chain conveyor (2) mounted on the bottom of the housing (1), characterized in that: The housing (1) is equipped with a pressing injection mechanism (3). The injection mechanism (3) includes a needle plate (31) installed inside the housing (1), and a hollow main needle (32) is threaded to the bottom of the needle plate (31). The bottom of the hollow main needle (32) is symmetrically provided with injection holes. The hollow main needle (32) has symmetrically provided limiting holes (33) on its outer side. Solid auxiliary needles (34) are slidably connected inside the limiting holes (33). The tail ends of the two solid auxiliary needles (34) are rotatably connected to a lower pressure sleeve (35). The hollow main needle (32) is fixedly connected to a limiting wedge sleeve (36). The hollow main needle (32) is slidably connected to an injection tube (37). The injection tube (37) and the lower pressure sleeve (35) are fixed. The lower pressure sleeve (35) is slidably installed inside the hollow main needle (32). The injection tube (37) and the limiting wedge sleeve (36) are slidably arranged.
2. The beef marinating apparatus for processing beef according to claim 1, characterized in that: The solid auxiliary needles (34) are provided in two groups, and each group of solid auxiliary needles (34) has two needles. The four solid auxiliary needles (34) are arranged in a cross shape and staggered.
3. The beef marinating apparatus for processing beef according to claim 1, characterized in that: The inclined surfaces of the limiting hole (33) and the limiting wedge sleeve (36) are both 30°, and the bottom surface of the limiting hole (33) and the inclined surface of the limiting wedge sleeve (36) are flush. When the hollow main needle (32) pierces the meat block and leaves a main hole, the injection tube (37) drives the lower pressure sleeve (35) to slide down. The tip of the solid auxiliary needle (34) and the inclined surface of the limiting wedge sleeve (36) abut and deflect, and punch out from the limiting hole (33) along the inclined surface of the limiting wedge sleeve (36). The solid auxiliary needle (34) with potential energy pierces the inclined micro-minor hole inside the muscle fiber of the meat block. The main hole and multiple micro-minor holes form a tree-like hole structure.
4. The beef marinating apparatus for processing beef according to claim 1, characterized in that: The top of the housing (1) is fixedly connected to a servo cylinder (4), and the bottom end of the rod of the servo cylinder (4) is fixedly connected to the needle plate (31). The inner wall of the housing (1) is symmetrically equipped with a servo compiler (5) for detecting the depth of the hollow main needle (32) piercing the meat block. The needle plate (31) is symmetrically equipped with a punching mechanism (6) for controlling the punching out and retraction of the solid auxiliary needle (34).
5. The beef marinating apparatus for processing beef according to claim 4, characterized in that: The punching mechanism (6) includes B servo cylinders (61) symmetrically mounted on the outside of the needle plate (31). The punching mechanism (6) also includes a distribution network (62) fixedly connected to the top of the injection pipe (37), and a storage device (63) is installed on the outside of the housing (1). The distribution network (62) and the storage device (63) are connected by a hose. A lifting plate (64) is fixedly installed on the top of the distribution network (62), and a hinge seat (65) is symmetrically fixedly connected to the top of the lifting plate (64). A rotating rod (66) is symmetrically installed between the top of the rod of the B servo cylinder (61) and the hinge seat (65). The rod of the A servo cylinder (4) and the lifting plate (64) are slidably arranged.
6. The beef marinating apparatus for processing beef according to claim 1, characterized in that: A pressing mechanism (7) for locating the injection hole position of the meat block during the injection process is installed below the needle plate (31). The pressing mechanism (7) includes a slide rod (71) slidably installed at the four corners of the needle plate (31). A pressing plate (72) is fixedly connected to the bottom of the slide rod (71). A spring (73) is installed between the needle plate (31) and the pressing plate (72). The spring (73) is sleeved on the outside of the slide rod (71). The extrusion plate (72) has the same number of slots and holes as the hollow main needle (32) and corresponding to the positions of the slots; The bottom of the extrusion plate (72) is equipped with a blocking mechanism (8) to reduce marinade overflow and waste.
7. The beef marinating apparatus for processing beef according to claim 6, characterized in that: The blocking mechanism (8) includes a hollow cover (81) fixedly installed at the bottom of the extrusion plate (72), and the hollow cover (81) and the slot on the outside of the extrusion plate (72) are in corresponding positions. The hollow cover (81) has a flow guide groove (82) on its inner wall, and a filter screen (83) is fixedly connected inside the flow guide groove (82). An atomizing nozzle (84) is fixedly connected to the outside of the hollow cover (81).
8. The beef marinating apparatus for processing beef according to claim 7, characterized in that: The hollow cover (81) has an A injection hole (9) and a B injection hole (10) inside. The radius of the A injection hole (9) is larger than the radius of the B injection hole (10). The B injection hole (10) is connected to the atomizing nozzle (84). When the meat is injected with marinade, a large amount of marinade overflows from the top of the main hole due to the pressure difference and the squeezing of the meat by the extrusion plate (72). The overflowing marinade is sprayed from the guide groove (82) on the inner wall of the hollow cover (81) through the A injection hole (9) and the B injection hole (10) in sequence, and then sprayed onto the outer surface of the meat from the atomizing nozzle (84). A rubber ring (11) is fixedly connected to the bottom of the hollow cover (81).