A linear reciprocating quick-freezing tunnel for food

Abstract

The present invention discloses a linear reciprocating quick-freezing tunnel for food, which relates to the technical field of conveying devices, including a machine body, a refrigeration system, a conveyor belt, a fixed bin, a lifting frame, a lifting unit, a floating frame, a first kneading roller, a second kneading roller, and a reciprocating rotating unit, wherein the reciprocating rotating unit is used to drive the second kneading roller to reciprocate when the lifting frame moves vertically. The present invention transports food raw materials to the second kneading roller of the lifting frame by setting a conveyor belt, and then the lifting frame moves downward, and then moves downward through the floating frame, so that the first kneading roller and the second kneading roller move relative to each other and squeeze the food raw materials. In addition, when the lifting frame moves downward, the first kneading roller will reciprocate, thereby driving the food raw materials to reciprocate horizontally between the first kneading roller and the second kneading roller, so that the blood water in the food raw materials can be squeezed out, and the squeezed blood water is mixed into the diluent for dilution, so as to avoid the high concentration of blood water and the generation of a large odor.

Description

Technical Field

[0001] The invention relates to the technical field of conveying devices, in particular to a linear reciprocating quick-freezing tunnel for food. Background Art

[0002] During the processing of food (especially meat products), the raw materials or finished products of the food need to be frozen. The food raw materials are transported and quickly frozen through the quick-freezing tunnel equipment, and then enter the freezing equipment for frozen storage.

[0003] The current quick-freezing tunnel equipment is equipped with a refrigeration system and a conveying system. The conveying system transports food raw materials. During the conveying process, the refrigeration system quickly freezes the food raw materials. Some foods, such as meat products, may be mixed with a large amount of water or blood before quick freezing. During quick freezing, the blood overflows to the surface of the meat products and causes the blood to freeze on the surface of the conveying system. As a result, after the meat products are quick-frozen, the surface of the meat products and the surface of the conveying system are frozen and bonded together, making them difficult to remove, thereby affecting the processing efficiency of the food. Summary of the invention

[0004] The object of the present invention is to provide a linear reciprocating quick-freezing tunnel for food to solve the problems raised in the above-mentioned background technology.

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

[0006] A linear reciprocating quick-freezing tunnel for food, comprising a quick-freezing tunnel body, a refrigeration system installed on the body, conveyor belts installed at both ends of the body, and further comprising:

[0007] A fixed bin is arranged in the body, wherein the diluent is stored in the fixed bin, the top of the fixed bin is open and the fixed bin is arranged between the two conveyor belts;

[0008] A lifting frame arranged in the fixed bin, wherein the lifting frame is driven to move vertically by a lifting unit installed in the fixed bin;

[0009] A floating frame is arranged above the lifting frame, a first kneading roller is rotatably connected to the floating frame, and a second kneading roller is rotatably connected to the lifting frame;

[0010] A reciprocating rotation unit connected to the lifting frame is used to drive the second kneading roller to reciprocate when the lifting frame moves vertically.

[0011] Furthermore, the lifting unit comprises:

[0012] A lifting cylinder vertically installed in the fixed bin, wherein a connecting column is connected to the cylinder rod of the lifting cylinder;

[0013] A bracket fixedly connected to the lifting frame, wherein the bracket is hinged to the upper end of the connecting column;

[0014] A flip assembly is arranged on the connecting column, and the flip assembly is used to drive the bracket to rotate along the hinge axis of the bracket on the connecting column.

[0015] Furthermore, the flip assembly comprises:

[0016] A movable hinge seat hinged on the connecting column, wherein a turning cylinder is installed on the movable hinge seat;

[0017] A connecting head is hinged on the bracket, and the connecting head is connected to the cylinder rod of the flip cylinder.

[0018] Furthermore, the reciprocating rotating unit comprises:

[0019] a gear fixedly connected to the second kneading roller, wherein the second kneading roller and the gear are coaxial;

[0020] A strip plate vertically installed in the installation groove provided in the inner wall of the fixed bin, wherein the outer wall of the strip plate is provided with a plurality of rack parts from top to bottom, and the gear is used in conjunction with the rack parts;

[0021] A reset assembly is arranged on the lifting frame, and the reset assembly is used to drive the gear to rotate when the gear is out of engagement with the rack portion.

[0022] Furthermore, the reset assembly includes a pivot coaxially fixed to the second kneading roller, the outer wall of the lifting frame is provided with a blind hole-shaped mounting hole, a volute spring is installed in the mounting hole, the volute spring is fixedly sleeved on the pivot, and its two ends in the elastic force direction are respectively fixed to the inner wall of the mounting hole and the periphery of the pivot.

[0023] Furthermore, a rubber layer is provided on the surface of the first kneading roller and the second kneading roller.

[0024] Furthermore, the lifting frame is provided with a driving unit, and the driving unit is used to drive the floating frame to move downward relative to the lifting frame when the lifting frame moves downward.

[0025] Furthermore, the driving unit comprises:

[0026] A fixed cylinder vertically fixed to the lifting frame, wherein a partition is fixed inside the fixed cylinder, and the partition divides the inside of the fixed cylinder into a first cavity and a second cavity from top to bottom in sequence, and a connecting pipe is provided on the fixed cylinder, and two ends of the connecting pipe are respectively connected to the first cavity and the second cavity;

[0027] A first piston coaxially engaged with the first cavity, wherein the first piston freely slides up and down in the first cavity;

[0028] a first sliding rod vertically fixed to the first piston, the first sliding rod passing through the fixed cylinder and sliding freely, one end of the first sliding rod passing through the fixed cylinder being fixed to the floating frame;

[0029] A second piston coaxially engaged in the second cavity, the second piston freely sliding up and down in the second cavity;

[0030] A buoyancy drive assembly is provided on the second piston, and the buoyancy drive assembly is used to drive the second piston to move upward.

[0031] Furthermore, a return spring is sleeved on the first sliding rod, and two ends of the return spring in the elastic force direction elastically press against the lifting frame and the floating frame respectively.

[0032] Furthermore, the buoyancy drive assembly includes a second sliding rod vertically fixed to the second piston, the lower end of the second sliding rod passes through the fixing tube and slides freely, and a floating ball is fixed to the lower end of the second sliding rod.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention provides a conveyor belt to convey the food raw materials to the second kneading roller of the lifting frame, and then the lifting frame moves downward, and then the floating frame moves downward, so that the first kneading roller and the second kneading roller move relatively and squeeze the food raw materials. In addition, when the lifting frame moves downward, the first kneading roller will reciprocate, thereby driving the food raw materials to reciprocate horizontally between the first kneading roller and the second kneading roller, so that the blood water in the food raw materials can be squeezed out, so as to avoid the blood water freezing during the quick freezing process, which makes it difficult to take the food raw materials out of the conveyor belt. In addition, the squeezed blood water is mixed with a diluent for dilution, so as to avoid the high concentration of blood water and the generation of a large odor.

[0035] The present invention is provided with a lifting frame that when it moves downward, the gear will mesh with the rack part, and when meshing, the second kneading roller will be driven to rotate, so that the food raw material moves horizontally. When the gear is out of meshing with the rack part, the elastic potential energy accumulated in the spiral spring is released, and then the driving gear rotates in the opposite direction, and then the second kneading roller rotates in the opposite direction, so that the food raw material moves in the opposite direction. In this way, when the lifting frame moves downward, the food raw material can move horizontally back and forth, so that the blood in the food raw material can be fully squeezed out.

[0036] The present invention arranges that when the lifting frame moves downward, the float contacts the diluent, and the diluent generates buoyancy on the float, so that the float drives the second sliding rod to move upward, so that the second piston slides upward in the second cavity, and then squeezes the air in the second cavity into the first cavity through the connecting pipe, and drives the first piston to move downward in the first cavity, so that the first piston drives the first sliding rod to move downward, and then the floating frame moves downward relative to the lifting frame, so that the first kneading roller and the second kneading roller generate a certain squeezing force on the food raw materials, so that the blood in the food raw materials can be squeezed out. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of a linear reciprocating quick-freezing tunnel for food in the present invention;

[0038] Figure 2 for Figure 1 A schematic diagram of the structure from a side view;

[0039] Figure 3 for Figure 1 The schematic diagram of the structure after the machine body is omitted;

[0040] Figure 4 for Figure 3 A schematic cross-sectional view of the middle structure;

[0041] Figure 5 for Figure 3 The structural diagram after omitting the floating frame;

[0042] Figure 6 for Figure 5 Schematic diagram of the explosion decomposition of the structure;

[0043] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point A;

[0044] Figure 8 It is a schematic diagram of the structure after the floating frame and the first kneading roller are assembled in the present invention;

[0045] Fig. 9 for Figure 8 A schematic cross-sectional view of the middle structure;

[0046] Fig.10 for Fig. 9 An enlarged schematic diagram of the local structure at point B.

[0047] In the figure, the description of each figure mark is as follows: 1. conveyor belt; 2. machine body; 3. refrigeration system; 4. fixed bin; 5. floating frame; 6. second kneading roller; 7. first kneading roller; 8. lifting frame; 9. reset spring; 10. first sliding rod; 11. mounting groove; 12. bracket; 13. second sliding rod; 14. float; 15. lifting cylinder; 16. connecting column; 17. flip cylinder; 18. connecting head; 19. strip plate; 20. gear; 21. volute spring; 22. pivot; 23. rack; 24. fixed cylinder; 25. connecting pipe; 26. second piston; 27. first piston; 28. first cavity; 29. ​​second cavity. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1 - Fig.10 The present invention provides a technical solution: a linear reciprocating quick-freezing tunnel for food, comprising a body 2 of the quick-freezing tunnel, a refrigeration system 3 installed on the body 2, the refrigeration system 3 is used to cool the inside of the body 2, and conveyor belts 1 are installed at both ends of the body 2, a fixed bin 4 with an open top is installed in the body 2, the fixed bin 4 is arranged between the two conveyor belts 1, and a certain amount of diluent (the diluent can be a tasteless and harmless liquid such as water) is stored in the fixed bin 4, a lifting frame 8 that can slide freely up and down is clamped in the fixed bin 4, and two brackets 12 are welded on the lifting frame 8, one of the brackets 12 is hinged with a connecting column 16, and the fixed A lifting cylinder 15 is vertically installed in the fixed warehouse 4, and the cylinder rod of the lifting cylinder 15 is connected to the connecting column 16. In addition, a movable hinge seat is hinged on the periphery of the connecting column 16, and a flip cylinder 17 is installed on the movable hinge seat. A connecting head 18 is connected to the cylinder rod of the flip cylinder 17, and the connecting head 18 is hinged on another bracket 12. In this way, when the cylinder rod of the lifting cylinder 15 is extended or retracted, the lifting frame 8 will be driven to move up and down accordingly. In addition, when the cylinder rod of the flip cylinder 17 is extended or retracted, the connecting head 18 will be driven to move. When the connecting head 18 moves, the lifting frame 8 is synchronously driven to flip, and the flip axis is the hinge axis of the lifting frame 8 on the connecting column 16;

[0050] Four first ear blocks are welded on the lifting frame 8, and a first sliding rod 10 that can slide freely up and down is vertically penetrated on the first ear block, and the upper ends of the plurality of first sliding rods 10 are connected to a floating frame 5 together. Specifically, four second ear blocks are welded on the floating frame 5, and the first ear block and the second ear block are correspondingly arranged, and the upper end of the first sliding rod 10 is welded on the second ear block, and the floating frame 5 is arranged in parallel with the lifting frame 8. A first kneading roller 7 is horizontally rotatably connected to the floating frame 5, and a second kneading roller 6 is horizontally rotatably connected to the lifting frame 8 through an installation pivot 22. The first kneading roller 7 and the second kneading roller 6 are arranged in a one-to-one correspondence, that is, the positive projection areas of the first kneading roller 7 and the second kneading roller 6 coincide, and a gear 20 is sleeved on one end of the pivot 22 that passes through the lifting frame 8, and the gear 20 is coaxially arranged with the second kneading roller 6. Mounting grooves 11 are provided on the inner walls on both sides of the fixed bin 4, and a strip plate 19 is vertically welded on the inner wall of one side of the mounting groove 11. The strip plate 19 The length direction is consistent with the vertical moving direction of the lifting frame 8. In addition, a plurality of rack parts 23 are provided on the strip plate 19 from top to bottom. The rack parts 23 are arranged at equal intervals, and the gear 20 is used in conjunction with the rack parts 23. A blind hole-shaped mounting hole is opened on the outer wall of the lifting frame 8. A volute spring 21 is installed in the mounting hole. The volute spring 21 is fixedly sleeved on the pivot 22, and its two ends in the direction of elastic force are respectively fixed to the inner wall of the mounting hole and the periphery of the pivot 22. When the lifting frame 8 is downward, When moving, the gear 20 begins to mesh with the rack portion 23. When meshing, the gear 20 drives the pivot 22 to rotate, thereby driving the second kneading roller 6 to rotate. At the same time, the pivot 22 winds up the spiral spring 21, so that the spiral spring 21 accumulates elastic potential energy. As the lifting frame 8 continues to move downward, the gear 20 disengages from the meshing with the rack portion 23. At this time, the elastic potential energy accumulated in the spiral spring 21 is released, thereby driving the pivot 22 to rotate in the opposite direction, and causing the second kneading roller 6 to rotate in the opposite direction.

[0051] A fixed cylinder 24 is vertically welded on the second ear block, and a partition is fixed inside the fixed cylinder 24. The partition divides the inside of the fixed cylinder 24 into a first cavity 28 and a second cavity 29 from top to bottom. A connecting pipe 25 is provided on the fixed cylinder 24, and both ends of the connecting pipe 25 are respectively connected with the first cavity 28 and the second cavity 29. A first piston 27 that can slide freely up and down is coaxially engaged in the first cavity 28. The lower end of the first sliding rod 10 penetrates into the fixed cylinder 24 and slides freely up and down. The first sliding rod 10 penetrates into the fixed cylinder 24. One end of the cylinder 24 is fixedly connected to the first piston 27, and the second cavity 29 is coaxially engaged with the second piston 26. The second piston 26 slides freely up and down in the second cavity 29. A return spring 9 is wrapped around the first sliding rod 10. The two ends of the return spring 9 elastically press against the lifting frame 8 and the floating frame 5 respectively. The second piston 26 is vertically fixedly connected with the second sliding rod 13. The lower end of the second sliding rod 13 passes through the fixed cylinder 24 and slides freely. The lower end of the second sliding rod 13 is fixedly connected with a floating ball 14.

[0052] When the lifting frame 8 moves downward, the float 14 will contact the diluent in the fixed bin 4, and the diluent will generate an upward buoyancy on the float 14. Under the action of the buoyancy, the float 14 drives the second sliding rod 13 to move upward, so that the second piston 26 moves upward in the second cavity 29, so that the second piston 26 squeezes the air in the second cavity 29 into the first cavity 28 through the connecting pipe 25, so that the first piston 27 moves downward in the first cavity 28 (the pipe opening of the connecting pipe 25 corresponding to the first cavity 28 is located above the first piston 27), and then the first piston 27 drives the first sliding rod 10 to move downward, so that the first sliding rod 10 drives the floating frame 5 to move downward, and the first ear block and the second ear block are reciprocated. The positioning spring 9 is compressed, and the return spring 9 accumulates elastic potential energy after compression, so that the floating frame 5 and the lifting frame 8 move relative to each other, that is, the floating frame 5 moves downward relative to the lifting frame 8, so that the first kneading roller 7 and the second kneading roller 6 jointly squeeze the food raw materials, and then squeeze out the blood in the food raw materials. After being squeezed out, the blood flows into the diluent, and the diluent dilutes the blood to avoid the high concentration of the blood and the generation of odor. In addition, the first kneading roller 7 and the second kneading roller 6 are provided with a rubber layer (not shown in the figure) on the surface. By providing the rubber layer, the friction resistance between the first kneading roller 7 and the second kneading roller 6 and the surface of the food raw materials is large, so that the first kneading roller 7 and the second kneading roller 6 can smoothly move the food raw materials back and forth.

[0053] Working principle of the present invention: Food raw materials are located on the left side of the machine body 2 (reference Figure 1 ) is transported to the machine body 2 by the conveyor belt 1, and the refrigeration system 3 on the machine body 2 works to cool down the inside of the machine body 2. During the transportation process, the food raw materials are initially cooled by the refrigeration system 3, and then the food raw materials fall from the discharge end of the conveyor belt 1 to the second kneading roller 6 of the lifting frame 8. Subsequently, the sensor installed in the machine body 2 senses that there are food raw materials on the lifting frame 8. At this time, the sensing signal of the sensor is fed back to the external control cabinet, and the control cabinet controls the lifting cylinder 15 to start, and the cylinder rod of the lifting cylinder 15 changes from the initial extended state to the shortened state, so that the lifting cylinder 15 drives the lifting frame 8 to move downward;

[0054] When the lifting frame 8 moves downward, the float 14 will contact the diluent in the fixed bin 4, and the diluent will generate an upward buoyancy on the float 14. Under the action of the buoyancy, the float 14 drives the second sliding rod 13 to move upward, so that the second piston 26 moves upward in the second cavity 29, so that the second piston 26 squeezes the air in the second cavity 29 into the first cavity 28 through the connecting pipe 25, so that the first piston 27 moves downward in the first cavity 28, and then the first piston 27 drives the first sliding rod 10 to move downward. , so that the first sliding rod 10 drives the floating frame 5 to move downward, and the first ear block and the second ear block compress the reset spring 9. After the reset spring 9 is compressed, the elastic potential energy is accumulated, and the floating frame 5 moves relative to the lifting frame 8, that is, the floating frame 5 moves downward relative to the lifting frame 8, so that the first kneading roller 7 and the second kneading roller 6 squeeze the food raw material together, and then squeeze out the blood in the food raw material. After being squeezed out, the blood flows into the diluent, and the diluent dilutes the blood to avoid the high concentration of blood and the generation of odor;

[0055] In addition, when the lifting frame 8 moves downward, the gear 20 begins to mesh with the rack portion 23. When meshing, the gear 20 drives the pivot 22 to rotate, thereby driving the second kneading roller 6 to rotate. At the same time, the pivot 22 winds up the spiral spring 21, so that the spiral spring 21 accumulates elastic potential energy. As the lifting frame 8 continues to move downward, the gear 20 disengages from the meshing with the rack portion 23. At this time, the elastic potential energy accumulated in the spiral spring 21 is released, thereby driving the pivot 22 to rotate in the opposite direction, and the second kneading roller 6 to rotate in the opposite direction, so that the first kneading roller 7 and the second kneading roller 6 knead the food raw materials back and forth, thereby squeezing out the blood in the food raw materials.

[0056] Subsequently, the cylinder rod of the lifting cylinder 15 extends, driving the lifting frame 8 to move upward, and the floating ball 14 begins to gradually break away from the contact with the diluent, thereby releasing the elastic potential energy of the return spring 9, thereby driving the first piston 27 to move upward, and the second piston 26 to move downward, and the floating frame 5 moves upward relative to the lifting frame 8. After the cylinder rod of the lifting cylinder 15 is extended to the right position, the flip cylinder 17 is started, and the cylinder rod of the flip cylinder 17 changes from the initial extended state to the shortened state, thereby causing the connector 18 to move in the direction of the flip cylinder 17, thereby causing the connector 18 to drive the lifting frame 8 to move upward. The lowering frame 8 flips toward the feeding end of another conveyor belt 1. After the lifting frame 8 moves up to its position, the gear 20 disengages from the meshing state with the rack portion 23. At this time, the second kneading roller 6 is in a free rotation state. Since the lifting frame 8 is in an inclined state, the food raw materials will move on the second kneading roller 6 under the action of gravity and fall to the feeding end of another conveyor belt 1. The conveyor belt 1 continues to convey the food raw materials after the blood is squeezed out. In this process, the food raw materials will be fully cooled by the refrigeration system 3. After being conveyed out, the workers collect the quick-frozen food raw materials.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A linear reciprocating quick-freezing tunnel for food, comprising a quick-freezing tunnel body (2), a refrigeration system (3) installed on the body (2), and conveyor belts (1) installed at both ends of the body (2), characterized in that: Also includes: A fixed bin (4) is arranged in the machine body (2), wherein the fixed bin (4) stores a diluent, the top of the fixed bin (4) is open and the fixed bin (4) is arranged between the two conveyor belts (1); A lifting frame (8) disposed in the fixed bin (4), the lifting frame (8) being driven to move vertically by a lifting unit installed in the fixed bin (4); A floating frame (5) is arranged above the lifting frame (8), a first kneading roller (7) is rotatably connected to the floating frame (5), and a second kneading roller (6) is rotatably connected to the lifting frame (8); a reciprocating rotation unit connected to the lifting frame (8), the reciprocating rotation unit being used to drive the second kneading roller (6) to reciprocate when the lifting frame (8) moves vertically; The lifting frame (8) is provided with a driving unit, and the driving unit is used to drive the floating frame (5) to move downward relative to the lifting frame (8) when the lifting frame (8) moves downward; The driving unit comprises: A fixed cylinder (24) vertically fixed to the lifting frame (8), a partition being fixedly connected inside the fixed cylinder (24), the partition separating the inside of the fixed cylinder (24) into a first cavity (28) and a second cavity (29) from top to bottom, a connecting pipe (25) being provided on the fixed cylinder (24), two ends of the connecting pipe (25) respectively communicating with the first cavity (28) and the second cavity (29); A first piston (27) coaxially engaged with the first cavity (28), wherein the first piston (27) slides freely up and down in the first cavity (28); a first sliding rod (10) vertically fixed to the first piston (27), the first sliding rod (10) passing through the fixed cylinder (24) and sliding freely, one end of the first sliding rod (10) passing through the fixed cylinder (24) being fixed to the floating frame (5); a second piston (26) coaxially engaged with the second cavity (29), the second piston (26) being able to slide freely up and down in the second cavity (29); A buoyancy drive component is provided on the second piston (26), and the buoyancy drive component is used to drive the second piston (26) to move upward.

2. The linear reciprocating quick-freezing tunnel for food according to claim 1, characterized in that: The lifting unit comprises: A lifting cylinder (15) vertically mounted in the fixed bin (4), wherein a connecting column (16) is connected to a cylinder rod of the lifting cylinder (15); A bracket (12) fixedly connected to the lifting frame (8), the bracket (12) being hinged to the upper end of the connecting column (16); A flip assembly is provided on the connecting column (16), and the flip assembly is used to drive the bracket (12) to rotate along a hinge axis of the bracket (12) on the connecting column (16).

3. The linear reciprocating quick-freezing tunnel for food according to claim 2, characterized in that: The flip assembly comprises: A movable hinge seat hinged to the connecting column (16), a tilting cylinder (17) being mounted on the movable hinge seat; A connecting head (18) is hingedly connected to the bracket (12), and the connecting head (18) is connected to the cylinder rod of the tilting cylinder (17).

4. The linear reciprocating quick-freezing tunnel for food according to claim 1, characterized in that: The reciprocating rotating unit comprises: a gear (20) fixedly connected to the second kneading roller (6), the second kneading roller (6) and the gear (20) being coaxial; A strip plate (19) vertically mounted in a mounting groove (11) provided on the inner wall of the fixed bin (4), wherein a plurality of rack portions (23) are provided on the outer wall of the strip plate (19) from top to bottom, and the gear (20) cooperates with the rack portions (23); A reset component is arranged on the lifting frame (8), and is used to drive the gear (20) to rotate when the gear (20) is disengaged from the gear rack (23).

5. The linear reciprocating quick-freezing tunnel for food according to claim 4, characterized in that: The reset assembly comprises a pivot (22) coaxially fixed to the second kneading roller (6); the outer wall of the lifting frame (8) is provided with a blind hole-shaped mounting hole, a volute spring (21) is installed in the mounting hole, the volute spring (21) is fixedly sleeved on the pivot (22), and its two ends in the direction of elastic force are respectively fixed to the inner wall of the mounting hole and the periphery of the pivot (22).

6. The linear reciprocating quick-freezing tunnel for food according to claim 1, characterized in that: The surfaces of the first kneading roller (7) and the second kneading roller (6) are provided with a rubber layer.

7. The linear reciprocating quick-freezing tunnel for food according to claim 1, characterized in that: A return spring (9) is sleeved around the first sliding rod (10), and two ends of the return spring (9) in the elastic force direction elastically press against the lifting frame (8) and the floating frame (5) respectively.

8. The linear reciprocating quick-freezing tunnel for food according to claim 1, characterized in that: The buoyancy drive assembly comprises a second sliding rod (13) vertically fixed to the second piston (26), the lower end of the second sliding rod (13) passes through the fixed cylinder (24) and slides freely, and the lower end of the second sliding rod (13) is fixedly connected to a floating ball (14).

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