A brine injection mechanism for pickled meat

Abstract

A brine injection mechanism for pickled meat, comprising a cross beam, a conveyor belt for horizontal transmission is arranged below the cross beam, a probe assembly and a number of injection assemblies are longitudinally arranged on the cross beam; a driving mechanism for driving the longitudinal sliding of the probe assembly and the injection assemblies is also arranged on the cross beam; the probe assembly and the injection assemblies are both slidably arranged on the cross beam through slide rails, and along the conveying direction of the conveyor belt, the meat products first pass through the probe assembly and then pass through the injection assemblies; a controller is also provided, the controller is connected to the probe assembly and each injection assembly for control, after the probe assembly detects the position and depth of the hard bone in the meat product, it transmits the position and depth of the hard bone to the controller, and the controller controls the needles at the corresponding positions of the injection assemblies to actively retract by the corresponding depth in advance, avoiding damage to the injection needle heads by the bones in the meat products, and at the same time only the probe needs to be replaced, avoiding frequent replacement of the needle heads.

Description

Technical Field

[0001] The present invention relates to a liquid distribution device, and more particularly to a brine distribution and injection mechanism. Background Art

[0002] During the production of pickled meat products on an assembly line, automated brine distribution and injection equipment is usually used. Such brine distribution and injection equipment usually uses a longitudinally moving injection head, on which a number of retractable injection needles are provided. Below the injection head, there is a conveyor belt on which the meat products to be injected are placed. The injection head moves longitudinally downward to insert the injection needles into the interior of the meat products to inject brine. Since there are usually bones at uncertain positions in the meat products, in order to protect the needles, the injection needles need to be set to be retractable. However, this requires a relatively complex injection needle installation structure, which not only needs to ensure that the injection needles have a certain downward pressure to be able to insert into the interior of the meat products, but also needs to have the ability to retract when encountering bones. Even so, since a number of parallel injection heads are usually required, although the injection needles can retract, they all need to come into hard contact with the bones before they can retract. Over time, this will still cause damage to the needles, resulting in needle bending and injection hole deformation, affecting the injection effect. And this kind of damage is not easy to detect and is also inconvenient to replace. Usually, the entire injection head is replaced after a period of time instead of replacing the damaged needles individually, resulting in a relatively high use cost.

[0003] Therefore, it is necessary to design a pickled meat brine injection detection and control mechanism to solve the problems of complex needle structure, easy damage and inconvenient replacement in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a pickled meat brine injection mechanism to solve the technical problems in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A pickled meat brine injection mechanism, characterized in that it includes a cross beam, a horizontally conveyed conveyor belt is arranged below the cross beam, a probe assembly and a number of injection assemblies are longitudinally arranged on the cross beam; a driving mechanism for driving the longitudinal sliding of the probe assembly and the injection assemblies is also arranged on the cross beam; the probe assembly and the injection assemblies are both slidably arranged on the cross beam through slide rails, and along the conveying direction of the conveyor belt, the meat products first pass through the probe assembly and then pass through the injection assemblies; a controller is also provided, and the controller is connected to the probe assembly and each injection assembly for control. After the probe assembly detects the position and depth of the hard bones in the meat products, it transmits the position and depth of the hard bones to the controller, and the controller controls the needles at the corresponding positions of the injection assemblies to actively retract by the corresponding depth in advance.

[0007] Preferably, the probe assembly includes a moving beam, which is fixedly connected to the output end of the driving mechanism. Both ends of the moving beam are slidably arranged on the slide rails on both sides; a number of probe units are longitudinally arranged on the moving beam.

[0008] Preferably, the probe unit includes a probe cylinder body, a probe, and a probe hydraulic circuit; the top end of the probe cylinder body is fixedly arranged on the moving beam, the lower end of the probe cylinder body is fixedly connected to a liquid supply beam, and a pressing plate is connected below the liquid supply beam through a limiting rod and a spring.

[0009] Preferably, the top of the probe has a probe piston that expands relative to the needle body. The needle body of the probe moves and extends outwards in the first through hole at the lower end of the probe cylinder body. There is a probe cavity inside the probe cylinder body for the probe piston to move. The probe piston slides up and down in the probe cavity, and the shape of the probe piston matches the inner wall of the probe cavity.

[0010] Preferably, an oil outlet is provided in the rodless cavity at the top of the probe cavity, and an oil inlet is provided in the rod cavity at the bottom of the probe cavity; one end of the probe hydraulic circuit is connected to the oil inlet, and the other end is connected to the oil outlet; a first variable pump, a first stop valve, and an adjustable throttle valve are arranged on the probe hydraulic circuit.

[0011] Preferably, a rotary encoder is arranged at the pump shaft of the first variable pump, and the rotary encoder is communicatively connected to the controller.

[0012] Preferably, the position and quantity of the injection units in the injection assembly relative to the moving beam are the same as the position and quantity of the probe units in the probe assembly relative to the moving beam.

[0013] Preferably, the injection unit includes an injection needle cylinder body, an injection needle, and an injection needle hydraulic circuit. The top of the injection needle has an injection needle piston. The injection needle cylinder body includes an injection needle cavity, which is divided into a rod cavity and a rodless cavity by the injection needle piston. The rod cavity of the injection needle cavity has a second oil inlet, and the rodless cavity of the injection needle cavity has a second oil outlet; one end of the injection needle hydraulic circuit is connected to the second oil inlet, and the other end is connected to the second oil outlet.

[0014] Preferably, the injection needle hydraulic circuit is provided with a second variable pump and a second stop valve; both the second variable pump and the second stop valve are communicatively connected to the controller.

[0015] Preferably, the rotary encoder of the probe unit detects the moving amount of the probe, and at the same time transmits the moving amount data to the controller. The controller controls the second variable pump on the injection unit at the corresponding position of the injection assembly to fill oil into the rod cavity of its injection needle cavity, and the oil filling amount ensures that the injection needle is lifted by the same moving amount relative to its injection needle cylinder body.

[0016] The beneficial effects of the present invention are:

[0017] 1. A probe unit is arranged in front of the injection unit. The position and depth of the bones on the meat product are detected by the probe unit, and the injection needle at the same position is controlled to move actively, avoiding damage to the needle tip of the injection needle by the bones in the meat product. At the same time, only the probe needs to be replaced, avoiding frequent replacement of the needle tip;

[0018] 2. When the probe head contacts the bones in the meat product passively, the probe can move upward relative to the back pressure. The movement amount of the probe is detected by the rotary encoder of the probe unit, and at the same time, the movement amount data is transmitted to the controller to realize synchronous detection of the position and depth of the bones; at the same time, the controller controls the second variable pump on the injection unit at the corresponding position of the injection assembly to fill oil into the rodless cavity of the injection needle cavity, and the oil filling amount ensures that the injection needle lifts the same movement amount relative to the injection needle barrel, and then closes the second stop valve, avoiding hard contact between the injection needle and the bones. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the brine injection mechanism for pickled meat of the present application;

[0020] Figure 2 is a schematic structural diagram of the probe assembly of the present application;

[0021] Figure 3 is a schematic structural diagram of the injection assembly of the present application;

[0022] In the figure: cross beam 100, conveyor belt 200, meat product M, probe assembly 1, injection assembly 2, slide rail 101, drive mechanism 102, moving beam 103, probe barrel 11a, probe 11b, probe hydraulic circuit 11c, liquid supply beam 104, limit rod 106, spring 107, pressing plate 105, probe piston 17, first through hole 13, probe cavity 12, probe cavity seal ring 14, first oil outlet 12b, first oil inlet 12a, first variable pump 11d, first stop valve 15, adjustable throttle valve 16, bone B, injection unit 21, injection needle barrel 21a, injection needle 21b, injection needle hydraulic circuit 21c, injection needle piston 27, outlet 211, second through hole 23, cavity 231, liquid supply channel 1041, injection needle cavity seal ring 24, sealing plug 21e, second variable pump 21d, second stop valve 25. Detailed Embodiments

[0023] The following describes in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0024] As Figure 1The figure shows a schematic diagram of the brine injection mechanism of the present invention. It includes a cross beam 100, and a horizontally conveyed conveyor belt 200 is arranged below the cross beam 100. The meat products M without brine injection are laid on the conveyor belt 200. The cross beam 100 is arranged along the conveying direction of the conveyor belt 200, and a probe assembly 1 and a plurality of injection assemblies 2 are longitudinally arranged on the cross beam 100. Both the probe assembly 1 and the injection assemblies 2 are slidably arranged on the cross beam 100 through slide rails 101, and a driving mechanism 102 for driving the longitudinal sliding of the probe assembly 1 and the injection assemblies 2 is also arranged on the cross beam 100. The driving mechanism 102 can adopt a conventional gear-rack driving structure, a lead screw-nut driving structure or a structure directly driven by a cylinder, a hydraulic cylinder or an electric cylinder.

[0025] Along the conveying direction of the conveyor belt 200, the meat product M first passes through the probe assembly 1 and then passes through the injection assemblies 2. When the meat product M is located below the probe assembly 1, the probe assembly 1 is driven by the driving mechanism 102 to press down longitudinally, and the probe assembly 1 is used to detect possible hard bones, cartilage, etc. in the meat product M. When the meat product M moves below the injection assemblies 2, the injection assemblies 2 are driven by the driving mechanism 102 to press down longitudinally, and brine is injected into the meat product M through the injection assemblies 2.

[0026] The present invention is also provided with a controller (not shown). The controller adopts a conventional PLC controller structure. The controller is connected to the probe assembly 1 and each injection assembly 2 for control. After the probe assembly 1 detects that there are hard-to-penetrate positions such as hard bones and cartilage at corresponding positions in the meat product M, the corresponding information is transmitted to the controller, and the controller controls the injection assemblies 2 to take measures to retract the needles at the corresponding positions in the injection assemblies 2 in advance to avoid hard contact between the needles at this position and the hard bones and cartilage.

[0027] As Figure 2The following is a schematic structural diagram of the probe assembly 1 of the present invention. As shown in the figure, the probe assembly 1 includes a moving beam 103, which is fixedly connected to the output end of the driving mechanism 102. Both ends of the moving beam 103 are slidably arranged on the sliding rails 101 on both sides. A plurality of probe units 11 are longitudinally arranged on the moving beam 103. The probe unit 11 includes a probe cylinder 11a, a probe 11b, and a probe hydraulic circuit 11c. The top end of the probe cylinder 11a is fixedly arranged on the moving beam 103, and the lower end of the probe cylinder 11a is fixedly connected to a liquid supply beam 104. A pressing plate 105 is connected below the liquid supply beam 104 through a limiting rod 106 and a spring 107. The top end of the limiting rod 106 passes through the liquid supply beam 104, and the limiting rod 106 can slide relative to the liquid supply beam 104. At the same time, the top end of the limiting rod 106 has an enlarged portion to achieve limiting and prevent the limiting rod 106 from coming out of the liquid supply beam 104. The lower end of the limiting rod 106 is fixedly connected to the upper side of the pressing plate 105, and the spring 107 is sleeved on the rod body of the limiting rod 106 between the pressing plate 105 and the liquid supply beam 104. The probe 11b is slidably installed inside the probe cylinder 11a, and the lower end of the probe 11b passes through a through hole in the pressing plate 105. When the driving mechanism 102 drives the moving beam 103 to press down, the moving beam 103 drives the probe unit 11 to press down. The pressing plate 105 first contacts the meat product M below. As the moving beam 103 moves further downward, the probe 11b extends from the pressing plate 105 and pierces into the interior of the meat product M.

[0028] The top of the probe 11b has a probe piston 17 that expands relative to the needle body. The needle body of the probe 11b moves and extends outward in the first through hole 13 at the lower end of the probe cylinder 11a. There is a probe cavity 12 inside the probe cylinder 11a for the probe piston 17 to move. The probe piston 17 slides up and down in the probe cavity 12, and the shape of the probe piston 17 matches the inner wall of the probe cavity 12. A probe cavity seal ring 14 is provided at the bottom of the probe cavity 12 for sealing the probe cavity 12. At the top of the probe cavity 12, that is, the rodless cavity of the probe cavity 12, there is a first oil outlet 12b, and at the bottom of the probe cavity 12, that is, the rod cavity of the probe cavity 12, there is a first oil inlet 12a. One end of the probe hydraulic circuit 11c is connected to the first oil inlet 12a, and the other end is connected to the first oil outlet 12b. A first variable pump 11d, a first stop valve 15, and an adjustable throttle valve 16 are provided on the probe hydraulic circuit 11c. The rod cavity, rodless cavity of the probe cavity 12, and the probe hydraulic circuit 11c are all filled with hydraulic oil. The first variable pump 11d can be driven to rotate forward and backward to respectively fill and drain oil from the rod cavity and rodless cavity of the probe cavity 12. When the first variable pump 11d fills oil into the rod cavity of the probe cavity 12, the probe 11b moves upward actively, and vice versa, the probe 11b moves downward actively. As Figure 2As shown, when the probe 11b is pressed down, after the head of the probe 11b touches the bone B, the probe 11b moves upward relative to the probe cylinder 11a. The probe piston 17 delivers the hydraulic oil in the rodless cavity to the rod cavity through the first oil outlet 12b, the adjustable flow valve 16, the first stop valve 15, the first variable pump 11d, and the first oil inlet 12a. During this process, the first variable pump 11d is not driven, and its pump shaft (not shown) is rotated by the hydraulic oil. A rotary encoder is arranged at its pump shaft to detect the number of rotations of the pump shaft, so as to detect the movement amount of the probe 11b, thereby detecting the presence of hard substances such as bones at the probe 11b, and at the same time detecting the relative depth of the bone hard substance. The rotary encoder of each probe 11b is communicatively connected to the controller, and transmits the needle contact condition and displacement data of the corresponding probe 11b position to the controller.

[0029] In the above probe hydraulic circuit 11c, an adjustable flow valve 16 is provided to adjust the back pressure in the probe hydraulic circuit 11c. This back pressure makes the probe 11b not move upward during the process of inserting into the meat product M, and only moves upward when the resistance is greater than the back pressure when touching the bone. The first stop valve 15 is used to switch on and off the probe hydraulic circuit 11c. After each pressing of the probe assembly 1, the first variable pump 11d of each probe unit 11 fills the rodless cavity with oil to reset the probe 11b to the lowest position.

[0030] As Figure 3 As shown is a schematic structural diagram of the injection assembly 2 of the present invention. The injection assembly 2 has the same structure as the probe assembly 1, and the difference is that the injection unit 21 in the injection assembly 2 replaces the probe unit 11. The position and quantity of the injection unit 21 in the injection assembly 2 relative to the moving beam 103 are the same as the position and quantity of the probe unit 11 in the probe assembly 1 relative to the moving beam 103, and they have a one-to-one correspondence relationship.

[0031] Similarly, the injection unit 21 has a cylinder-piston structure similar to the probe unit 11. The injection unit 21 includes an injection needle cylinder 21a, an injection needle 21b, and an injection needle hydraulic circuit 21c. The top end of the injection needle cylinder 21a is fixedly arranged on the moving beam 103, and the lower end of the injection needle cylinder 21a is fixedly connected to the liquid supply beam 104. The top end of the injection needle 21b has an injection needle piston 27. The body of the injection needle 21b is of a hollow structure, and an outlet 211 is provided near the bottom needle tip. The bottom of the injection needle piston 27 has a needle body, and the needle body passes through the second through hole 23 at the bottom of the injection needle cylinder 21a. A spherical cavity 231 is provided at the bottom of the second through hole 23, and a brine inlet 212 is provided at the part of the needle body of the injection needle 21b located in the second through hole 23. A liquid supply channel 1041 is provided on the liquid supply beam 104. The liquid supply channel 1041 is connected to an external brine supply device. At the same time, the liquid supply channel 1041 communicates with the cavity 231 above each injection unit 21. At the same time, the size of the second through hole 23 is slightly larger than the size of the needle body of the injection needle 21b. The external brine supply device distributes brine into the cavity 231 of each injection unit 21 through the liquid supply channel 1041 of the liquid supply beam 104. Then the brine flows into the inside of the injection needle 21b from the inlet 212 and flows out from the outlet 211, and is injected into the meat product M.

[0032] The injection needle cylinder 21a includes an injection needle cavity 22. The injection needle cavity 22 is divided into a rod chamber and a rodless chamber by the injection needle piston 27. The rod chamber of the injection needle cavity 22 has an injection needle cavity sealing ring 24. The upper end of the second through hole 23 is sealed by the injection needle cavity sealing ring 24, and the lower end is sealed by a sealing plug 21e. Similarly, the rod chamber of the injection needle cavity 22 has a second oil inlet 22a, and the rodless chamber of the injection needle cavity 22 has a second oil outlet 22b. One end of the injection needle hydraulic circuit 21c communicates with the second oil inlet 22a, and the other end communicates with the second oil outlet 22b. The rod chamber and the rodless chamber of the injection needle cavity 22 and the injection needle hydraulic circuit 21c are all filled with hydraulic oil. The injection needle hydraulic circuit 21c is provided with a second variable pump 21d and a second stop valve 25. Both the second variable pump 21d and the second stop valve 25 are communicatively connected to the controller. When the second variable pump 21d fills the rod chamber of the injection needle cavity 22 with oil, the injection needle 21b can be lifted relative to the injection needle cylinder 21a. At the same time, the second variable pump 21d receives the control of the controller to fill the rod chamber with a fixed amount of oil, and can lift the injection needle 21b relative to the injection needle cylinder 21a by a controllable displacement amount. When the second variable pump 21d fills the rodless chamber with oil, the injection needle 21b is reset to the lowest position relative to the injection needle cylinder 21a. The second stop valve 25 is controlled by the controller to open and close the injection needle hydraulic circuit 21c. When the second stop valve 25 is controlled to close, the flow paths of the rod chamber and the rodless chamber of the injection needle cavity 22 are cut off, and the injection needle 21b is held in a specific position during the process of inserting into the meat product M.

[0033] The following combinesFigures 1-3 Describe the working process of the present invention.

[0034] Along the conveying direction of the conveyor belt 200, the meat product M first passes through the probe assembly 1 and then through the injection assembly 2. When the meat product M is located below the probe assembly 1, the probe assembly 1 is driven by the driving mechanism 102 to press down longitudinally. Each probe unit 11 in the probe assembly 1, due to the back pressure of the adjustable flow valve 16, the probe 11b inserts downward into the meat product M. If the head of one of the probes 11b touches the bone B in the meat product M, taking the second probe unit 11 from the left as an example, at this time the probe 11b moves upward relative to overcoming the back pressure, and the rotary encoder of this probe unit 11 detects the moving amount of the probe 11b and transmits the moving amount data to the controller at the same time. At this time, the controller controls the second variable pump 21d on the injection unit 21 at the corresponding position of the injection assembly 2 to fill oil into the rod chamber of its injection needle cavity 22, and the oil filling amount ensures that its injection needle 21b is lifted by the same moving amount relative to its injection needle barrel 21a, and then closes the second cut-off valve 25. Subsequently, when the meat product M moves below the injection assembly 2, the moving beam 103 presses down each injection unit 21. Since the injection needle 21b at this position has been lifted by the corresponding moving amount in advance, the needle tip of the injection needle 21b at this position will not make hard contact with the bone B at this position on the meat product M, so the needle tip will not be damaged. After the brine injection is completed, when the moving beam 103 moves upward and the needle tip leaves the meat product M, when the second variable pump 21d fills the oil into the rodless chamber, the injection needle 21b is reset to the lowest position relative to the injection needle barrel 21a.

[0035] By the above method, a probe unit is arranged in front of the injection unit. The position and depth of the bone on the meat product are detected by the probe unit, and the injection needle at the same position is controlled to move actively, avoiding damage to the needle tip of the injection needle by the bone in the meat product.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0037] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A brine injection mechanism for pickled meat, characterized in that, It includes a cross beam, a conveyor belt for horizontal transmission is arranged below the cross beam, a probe assembly and several injection assemblies are longitudinally arranged on the cross beam; a driving mechanism for driving the longitudinal sliding of the probe assembly and the injection assemblies is also arranged on the cross beam; the probe assembly and the injection assemblies are both slidably arranged on the cross beam through slide rails, and along the conveying direction of the conveyor belt, the meat product first passes through the probe assembly and then through the injection assembly; a controller is also provided, the controller is control-connected to the probe assembly and each injection assembly, after the probe assembly detects the position and depth of the hard bone of the meat product, it transmits the position and depth of the hard bone to the controller, and the controller controls the needles at the corresponding positions of the injection assemblies to actively retract in advance by the corresponding depth; The probe assembly includes a moving beam, the moving beam is fixedly connected to the output end of the driving mechanism, and both ends of the moving beam are slidably arranged on the slide rails on both sides; several probe units are longitudinally arranged on the moving beam; The probe unit includes a probe cylinder body, a probe, and a probe hydraulic circuit; the top end of the probe cylinder body is fixedly arranged on the moving beam, the lower end of the probe cylinder body is fixedly connected to a liquid supply beam, and a pressing plate is connected below the liquid supply beam through a limiting rod and a spring; The top of the probe has a probe piston that expands relative to the needle body, the needle body of the probe moves and extends outwards in the first through hole at the lower end of the probe cylinder body, there is a probe cavity inside the probe cylinder body for the probe piston to move, the probe piston slides up and down in the probe cavity, and the shape of the probe piston matches the inner wall of the probe cavity.

2. The brine injection mechanism for pickled meat according to claim 1, characterized in that: The rodless cavity at the top of the probe cavity is provided with a first oil outlet, and the rod cavity at the bottom of the probe cavity is provided with a first oil inlet; one end of the probe hydraulic circuit is connected to the first oil inlet, and the other end is connected to the first oil outlet; a first variable pump, a first stop valve and an adjustable throttle valve are arranged on the probe hydraulic circuit.

3. The brine injection mechanism for pickled meat according to claim 2, characterized in that: A rotary encoder is arranged at the pump shaft of the first variable pump, and the rotary encoder is in communication connection with the controller.

4. The brine injection mechanism for pickled meat according to claim 3, wherein: The position and quantity of the injection units in the injection assembly relative to the moving beam are the same as the position and quantity of the probe units in the probe assembly relative to the moving beam.

5. The brine injection mechanism for pickled meat according to claim 4, characterized in that: The injection unit includes an injection needle cylinder body, an injection needle, and an injection needle hydraulic circuit. The top end of the injection needle has an injection needle piston. The injection needle cylinder body includes an injection needle cavity, and the injection needle cavity is divided into a rod cavity and a rodless cavity by the injection needle piston. The rod cavity of the injection needle cavity has a second oil inlet, and the rodless cavity of the injection needle cavity has a second oil outlet; one end of the injection needle hydraulic circuit is connected to the second oil inlet, and the other end is connected to the second oil outlet.

6. The brine injection mechanism for pickled meat according to claim 5, characterized in that: The injection needle hydraulic circuit is provided with a second variable pump and a second stop valve; both the second variable pump and the second stop valve are in communication connection with the controller.

7. The brine injection mechanism for pickled meat according to claim 6, characterized in that: The rotary encoder of the probe unit detects the moving amount of the probe, and at the same time transmits the moving amount data to the controller. The controller controls the second variable pump on the injection unit at the corresponding position of the injection assembly to fill the rod cavity of its injection needle cavity with oil, and the oil filling amount ensures that the injection needle is lifted by the same moving amount relative to its injection needle cylinder body.

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