Pet food vacuum packaging equipment

Abstract

The present invention belongs to the technical field of packaging equipment, specifically a pet food vacuum packaging equipment, including a workbench, a vacuum cover is movable on the workbench, two connecting rods are movable on both sides of the workbench, a plurality of connecting rods are movably connected to the side of the vacuum cover, and the two connecting rods are arranged in parallel; a fixing base plate is also arranged on the side of the connecting rod away from the vacuum cover, and a guide screw assembly is arranged on the fixing base plate, and the guide screw assembly is used to limit the movement of the vacuum cover so that it moves along a specified direction; the guide screw assembly includes a guide arc column arranged on the fixing base plate, an arc-shaped square tube is slid on the guide arc column, and vents are arranged on the opposite surfaces of the two arc-shaped square tubes on one side of the workbench. The present invention can prevent gas from infiltrating or flowing out during the packaging process, resulting in the inability to reach a vacuum state inside the processing chamber, by means of a pressurized closed unit, thereby improving the use effect of the vacuum packaging equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging, in particular to vacuum packaging equipment for pet food. Background Art

[0002] The vacuum packaging machine can automatically extract the air from the packaging bag and complete the sealing process after reaching a predetermined vacuum degree; it can also be refilled with nitrogen or other mixed gases to complete the sealing process; vacuum packaging machines are often used in the food industry because after vacuum packaging, the food can resist oxidation, thereby achieving the purpose of long-term preservation.

[0003] When the existing pet food vacuum packaging equipment is closing the lid, that is, connecting the vacuum lid to the workbench for vacuuming, it is impossible to ensure that the two are tightly connected. If there is a gap between the two when closing due to debris or other non-human factors on the workbench, not only will the package be at risk of damage, but air will also penetrate into the working area, resulting in the inability to reach a vacuum state inside, making it impossible for the equipment to operate normally, which makes the equipment have limitations when used and reduces the use effect of the equipment. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a vacuum packaging device for pet food, which effectively solves the problems in the above background technology.

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

[0006] A pet food vacuum packaging device comprises a workbench, on which a vacuum cover is movably disposed; two connecting rods are movably disposed on both sides of the workbench, a plurality of connecting rods are movably connected to the side surfaces of the vacuum cover, and the two connecting rods are arranged in parallel;

[0007] A fixing base plate is also provided on the side of the connecting rod away from the vacuum cover, and a guide screw assembly is provided on the fixing base plate, and the guide screw assembly is used to limit the movement of the vacuum cover so that it moves along a specified direction; the guide screw assembly includes a guide arc column provided on the fixing base plate, and an arc-shaped square tube is slidably provided on the guide arc column, and air holes are provided on the opposite surfaces of the two arc-shaped square tubes on one side of the workbench, and a pressurized sealing unit is provided on the air holes; when the workbench and the vacuum cover are closed, the sealing of the connection between the two is enhanced by the pressurized sealing unit.

[0008] Preferably, the pressurized closed unit includes a first L-tube, the air inlet end of the first L-tube is arranged on the arc-shaped square tube and connected to the air vent; the air outlet end of the first L-tube is connected to the second L-tube; gas-making square boxes are fixed on both sides of the workbench, and the outlets of the two second L-tubes on each side of the workbench are connected to the bottom surface of the gas-making square box; air inlet valves are symmetrically arranged on the opposite surfaces of the two gas-making square boxes.

[0009] Preferably, connecting valves are installed on both sides of the gas-making box, and both connecting valves are installed with bent pipes, and the output ends of the bent pipes face the vacuum cover; a pressurizing column slides on the output ends of the bent pipes.

[0010] Preferably, U-shaped bases are installed on both sides of the workbench, and the two U-shaped bases are facing the workbench; limiting cylinders are symmetrically arranged on the opposite surfaces of the two U-shaped bases, and the two limiting cylinders on one side of the workbench are slidably arranged together to set a limiting cross block, and a handle is installed on the side of the limiting cross block away from the workbench; two limiting arc blocks are installed on the top surface of the limiting cross block, and the two limiting arc blocks on one side of the workbench are respectively located on the side surfaces of the two arc-shaped square tubes on this side; a limiting rod is installed on the side of the limiting arc block close to the arc-shaped square tube; a plurality of limiting slots are provided on the side of the guide arc column, and the limiting rod passes through the arc-shaped square tube and is connected with the limiting slots.

[0011] Preferably, a limit spring is sleeved on the limit cylinder, one end of the limit spring is connected to the limit cross block, and the other end is connected to the limit circular plate, and the limit circular plate is arranged at the end of the limit cylinder away from the U-shaped base; an arc spring is arranged in the arc square tube, one end of the arc spring is connected to the guide arc column, and the other end is connected to the inner bottom surface of the arc square tube.

[0012] Preferably, the two guide arc columns respectively provided on both sides of the vacuum cover are respectively arranged at relative positions of two fixing substrates on one side of the vacuum cover; one end of the arc-shaped square tube is an open end, and the other end is a closed end, and a guide base is installed on the closed end of the arc-shaped square tube, and the guide base is fixed on the workbench.

[0013] Preferably, processing chambers are symmetrically arranged on the top surface of the workbench, and the vacuum cover fits with one of the processing chambers during movement; pressurized circular grooves are also symmetrically arranged on the top surface of the workbench, and the size of the pressurized circular grooves is larger than the processing chambers; circular pressure blocks are slidably arranged on the two pressurized circular grooves, and the side of the circular pressure blocks close to the bending pipe is connected to the pressurized column; a plurality of pressurized springs are arranged in the pressurized circular groove, one end of the pressurized spring is connected to the circular pressure block, and the other end is connected to the inner bottom surface of the pressurized circular groove.

[0014] Preferably, a gas cooler is also provided on the bent pipe; the gas cooler also includes a connecting hole provided on the bent pipe, and a control valve is provided on the connecting hole; a gas L-pipe is also installed on the bent pipe, and the gas L-pipe is connected to the connecting hole.

[0015] Preferably, a cooling nozzle is rotated on the output end of the gas-making L-tube, and the output end of the cooling nozzle faces the processing chamber; an auxiliary base is provided on the workbench, and the auxiliary base is connected to the gas-making L-tube and the cooling nozzle.

[0016] Preferably, a locking circular groove is provided on one side of the vacuum cover close to the workbench, and the locking circular groove has the same size as the pressurizing circular groove; the locking circular groove is located on the moving path of the circular pressurizing block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The gas in the arc-shaped square tube enters the first L-tube through the vent hole, and the gas is transported to the gas-making box under the action of the second L-tube, so that the gas pressure inside is increased; at this time, the air inlet valve, the connecting valve and the control valve are all in a closed state, until the vacuum cover moves to the processing room on the left side of the figure and contacts the surface of the workbench, indicating that the processing room at this location is in a closed state to wait for the start of the equipment for vacuum packaging. At this time, by closing the connecting valve, due to the different pressures on the gas-making box and the bent pipe, the gas in the gas-making box will flow into the bent pipe and act on the pressurization The vacuum cover is placed on the cylinder to limit its movement in the bent pipe, thereby driving the circular pressure block to move, causing it to limit its movement in the pressurized circular groove and enter the locking circular groove on the vacuum cover, so that the pressure spring is in a buffer state, which not only further isolates the processing chamber to prevent gas from seeping in or out during the packaging process, resulting in the inability to reach a vacuum state inside the processing chamber, thereby improving the sealing performance of the equipment during packaging, but also further limits the vacuum cover to prevent it from shaking or swinging due to the gas generated during the processing, thereby improving the stability of the vacuum cover during use, thereby improving the use effect of the equipment.

[0019] 2. When the gas is ejected from the connecting hole through the bent pipe, it will enter the gas-making L-tube. Under the action of the cooling nozzle, the cooled gas will be ejected and act on the newly packaged food bag to cool it and avoid damage to the food caused by the heating temperature aisle. At the same time, cooling can also reduce the temperature inside the packaging bag, reduce the growth rate of microorganisms, reduce the risk of food spoilage, and improve the safety of food packaging.

[0020] 3. After the vacuum cover moves into position, that is, after it contacts the workbench, the handle that was originally pulled outward is released, so that the limit spring that was originally in the buffer state is reset, thereby driving the limit arc block on the limit horizontal block to reset and move, so that the limit plug rod on it passes through the arc-shaped square tube and is connected to the limit slot, thereby limiting the guide arc column to the current position, avoiding the movement of the vacuum cover due to non-human factors during the pet food packaging process, causing gas to penetrate or flow out; and, when the guide arc column is limited, no force is applied to the vacuum cover at this time, so that the arc spring in the buffer state cannot be reset, and the elastic force brought about acts on the guide arc column, which can effectively enhance the friction and strength of the contact between the limit plug rod and the limit slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0022] In the attached picture:

[0023] Figure 1 This is one of the overall structural schematic diagrams of the pet food vacuum packaging equipment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the guide base in the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the limiting slot in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the cooling nozzle in the present invention;

[0027] Figure 5 This is the second overall structural schematic diagram of the pet food vacuum packaging equipment of the present invention;

[0028] Figure 6 is a cross-sectional view of the gas-making square box of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the limiting plug rod in the present invention;

[0030] Figure 8 It is an internal diagram of the pressurized circular groove in the present invention;

[0031] Fig. 9 It is a cross-sectional view of the arc-shaped square tube in the present invention;

[0032] Fig.10 It is a structural schematic diagram of the arc spring in the present invention;

[0033] Fig.11 It is a structural schematic diagram of the locking circular groove in the present invention;

[0034] In the figure: 1, workbench; 2, vacuum cover; 3, connecting rod; 4, fixed base plate; 5, guide arc column; 6, arc-shaped square tube; 7, vent hole; 8, first L-tube; 9, second L-tube; 10, gas-making square box; 11, air inlet valve; 12, connecting valve; 13, bending pipe; 14, pressurizing column; 15, U-shaped base; 16, limit cylinder; 17, limit horizontal block; 18, handle; 19, Limit arc block; 20, limit rod; 21, limit slot; 22, limit spring; 23, limit circular plate; 24, arc spring; 25, guide base; 26, processing chamber; 27, pressurized circular groove; 28, circular pressurizing block; 29, pressurizing spring; 30, connecting hole; 31, control valve; 32, gas L-tube; 33, cooling nozzle; 34, auxiliary base; 35, locking circular groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 11 As shown, the pet food vacuum packaging equipment of the present invention includes a workbench 1, on which a vacuum cover 2 is movably disposed; two connecting rods 3 are movably disposed on both sides of the workbench 1, and a plurality of connecting rods 3 are movably connected to the side surfaces of the vacuum cover 2, and the two connecting rods 3 are arranged in parallel; a fixing base plate 4 is also disposed on the side of the connecting rod 3 away from the vacuum cover 2, and a guide screw assembly is disposed on the fixing base plate 4, and the guide screw assembly is used to limit the movement of the vacuum cover 2 so that it moves along a specified direction.

[0037] In some embodiments, the guide screw assembly includes a guide arc column 5 arranged on a fixed base plate 4, an arc-shaped square tube 6 is slid on the guide arc column 5, and vents 7 are provided on the opposite surfaces of the two arc-shaped square tubes 6 on one side of the workbench 1, and a pressurized sealing unit is provided on the vents 7; when the workbench 1 and the vacuum cover 2 are closed, the sealing of the connection between the two is enhanced by the pressurized sealing unit.

[0038] At the same time, the present invention also installs U-shaped bases 15 on both sides of the workbench 1, and the two U-shaped bases 15 are facing the workbench 1; limiting cylinders 16 are symmetrically arranged on the opposite surfaces of the two U-shaped bases 15, and the two limiting cylinders 16 on one side of the workbench 1 are slidably arranged to set a limiting horizontal block 17 together, and a handle 18 is installed on the side of the limiting horizontal block 17 away from the workbench 1; two limiting arc blocks 19 are installed on the top surface of the limiting horizontal block 17, and the two limiting arc blocks 19 on one side of the workbench 1 are respectively located on the side surfaces of the two arc-shaped square tubes 6 on this side; a limiting plug rod 20 is installed on the side of the limiting arc block 19 close to the arc-shaped square tube 6; a plurality of limiting slots 21 are provided on the side of the guide arc column 5, and the limiting plug rod 20 passes through the arc-shaped square tube 6 and The limiting slot 21 is connected; a limiting spring 22 is sleeved on the limiting cylinder 16, one end of the limiting spring 22 is connected to the limiting horizontal block 17, and the other end is connected to the limiting circular plate 23, and the limiting circular plate 23 is arranged at the end of the limiting cylinder 16 away from the U-shaped base 15; an arc spring 24 is arranged in the arc-shaped square tube 6, one end of the arc spring 24 is connected to the guide arc column 5, and the other end is connected to the inner bottom surface of the arc-shaped square tube 6; the two guide arc columns 5 respectively provided on both sides of the vacuum cover 2 are respectively arranged at the relative positions of the two fixing base plates 4 on one side of the vacuum cover 2; one end of the arc-shaped square tube 6 is an open end, and the other end is a closed end. A guide base 25 is installed on the closed end of the arc-shaped square tube 6, and the guide base 25 is fixed on the workbench 1.

[0039] During the packaging process of pet food, the vacuum cover 2 is operated to contact the workbench 1. When the vacuum cover 2 is moving, the two connecting rods 3 are parallel, so that the two connecting rods 3 move synchronously, and the end connected to the workbench 1 is fixed and rotated at the current position, thereby driving the fixed base plate 4 to rotate, so that the guide arc column 5 on it moves within the arc-shaped square tube 6, and then the arc spring 24 inside it is in a buffering state, which is used to limit the movement of the vacuum cover 2, avoid dislocation or shaking during movement, and cause problems in the connection between the vacuum cover 2 and the workbench 1, so that the stability of the vacuum cover 2 during movement is ensured.

[0040] At the same time, when the vacuum cover 2 moves into position, that is, after it contacts the workbench 1, by loosening the handle 18 that was originally pulled outward, the limit spring 22 that was originally in the buffer state is reset, thereby driving the limit arc block 19 on the limit cross block 17 to reset and move, so that the limit plug rod 20 on it passes through the arc-shaped square tube 6 and is connected to the limit slot 21, thereby limiting the guide arc column 5 to the current position, avoiding the movement of the vacuum cover 2 due to non-human factors during the pet food packaging process, causing gas to infiltrate or flow out, thereby improving the use effect of the equipment.

[0041] It should be noted that when the guide arc column 5 is limited, no force is applied to the vacuum cover 2, so that the arc spring 24 in the buffer state cannot be reset. The elastic force brought about acts on the guide arc column 5, thereby enhancing the friction and strength of the contact between the limit rod 20 and the limit slot 21, and further improving the safety of the equipment when in use.

[0042] In some other embodiments, the above-mentioned pressurized closed unit includes a first L-tube 8, the air inlet end of the first L-tube 8 is arranged on the arc-shaped square tube 6 and is connected to the vent hole 7; the air outlet end of the first L-tube 8 is connected to the second L-tube 9; gas-making square boxes 10 are fixed on both sides of the workbench 1, and the outlets of the two second L-tubes 9 on both sides of the workbench 1 are connected to the bottom surface of the gas-making square box 10; air inlet valves 11 are symmetrically arranged on the opposite surfaces of the two gas-making square boxes 10; connecting valves 12 are installed on both sides of the gas-making square box 10, and the two connecting valves 12 are installed with bent pipes 13, and the output end of the bent pipe 13 faces the vacuum cover 2; a pressurized column 14 is slid on the output end of the bent pipe 13.

[0043] In addition, processing chambers 26 are symmetrically arranged on the top surface of the workbench 1, and the vacuum cover 2 is fitted with one of the processing chambers 26 during movement; pressurized circular grooves 27 are also symmetrically arranged on the top surface of the workbench 1, and the size of the pressurized circular grooves 27 is larger than the processing chambers 26; circular pressurizing blocks 28 are slidably arranged on the two pressurized circular grooves 27, and the side of the circular pressurizing blocks 28 close to the bending pipe 13 is connected to the pressurizing column 14; a plurality of pressurizing springs 29 are arranged in the pressurizing circular grooves 27, one end of the pressurizing spring 29 is connected to the circular pressurizing block 28, and the other end is connected to the inner bottom surface of the pressurizing circular groove 27; a locking circular groove 35 is arranged on the side of the vacuum cover 2 close to the workbench 1, and the locking circular groove 35 has the same size as the pressurized circular groove 27; the locking circular groove 35 is located on the moving path of the circular pressurizing block 28.

[0044] When in use, a plurality of food packages to be packaged are first placed in one of the processing chambers 26, and then the vacuum cover 2 is moved, for example, from Figure 1 The process of the processing chamber 26 on the right side moving to the processing chamber 26 on the left side of the figure indicates that the food in the processing chamber 26 on the right side has been vacuum packed. At this time, during the movement, the guide arc column 5 on the left side is limitedly moved in the arc-shaped square tube 6, that is, it enters the arc-shaped square tube 6, and the other side is opposite; the gas in the arc-shaped square tube 6 enters the first L-tube 8 through the vent 7, and the above-mentioned gas is transported to the gas-making square box 10 under the action of the second L-tube 9, so that the gas pressure inside it increases.

[0045] It should be noted that at this time, the air inlet valve 11, the connecting valve 12 and the control valve 31 are all in a closed state, until the vacuum cover 2 moves to the processing chamber 26 on the left side of the figure and contacts the surface of the workbench 1, indicating that the processing chamber 26 there is in a closed state to wait for the start of the equipment for vacuum packaging. At this time, by closing the connecting valve 12, due to the different pressures on the gas-making box 10 and the bent pipe 13, the gas in the gas-making box 10 will flow into the bent pipe 13 and act on the pressurized column 14, causing it to move within the bent pipe 13, thereby The circular pressure block 28 is driven to move, so that it moves within the pressure circular groove 27 and enters the locking circular groove 35 on the vacuum cover 2, so that the pressure spring 29 is in a buffer state, which not only further isolates the processing chamber 26, but also prevents gas from infiltrating or flowing out during the packaging process, resulting in the inability to reach a vacuum state inside the processing chamber 26, thereby improving the sealing performance of the equipment during packaging and avoiding the above-mentioned phenomenon; at the same time, the vacuum cover 2 is further limited to prevent the gas generated during the processing from causing it to shake or swing, thereby improving the stability of the vacuum cover 2 during use. It should be noted that by closing the connecting valve 12, the gas in the bent pipe 13 cannot flow out during use.

[0046] It is worth mentioning that when the vacuum cover 2 completes packaging of the food in the processing chamber 26 on the left and needs to be detached and the above operation needs to be repeated on the processing chamber 26 on the right, the air inlet valve 11 is opened to restore the gas in the arc-shaped square tube 6, and the control valve 31 is opened at the same time to reset the pressure spring 29 in the buffer state, and then the gas in the pressurized circular groove 27 is ejected from the connecting hole 30 through the bent pipe 13, so that the circular pressure block 28 is reset and moved, thereby preventing it from affecting the movement of the vacuum cover 2, reducing the limitations of the equipment during use, and improving the use effect of the equipment.

[0047] In some embodiments, the present invention further provides an air cooler on the bent pipe 13 .

[0048] Specifically, the gas cooler also includes a connecting hole 30 arranged on the bent pipe 13, and a control valve 31 is provided on the connecting hole 30; a gas L-tube 32 is also installed on the bent pipe 13, and the gas L-tube 32 is connected to the connecting hole 30; a cooling nozzle 33 is rotated on the output end of the gas L-tube 32, and the output end of the cooling nozzle 33 faces the processing chamber 26; an auxiliary base 34 is provided on the workbench 1, and the auxiliary base 34 is connected to the gas L-tube 32 and the cooling nozzle 33.

[0049] When the gas in the pressurized closed unit is ejected from the connecting hole 30 through the bent pipe 13, it will enter the gas making L-tube 32, and the cooled gas will be ejected under the action of the cooling nozzle 33 and act on the food bag that has just been packaged, so as to cool it and avoid damage to the food caused by the heating temperature aisle. At the same time, cooling can also lower the temperature inside the packaging bag, thereby reducing the growth rate of microorganisms and the risk of food spoilage, thereby improving the use effect of the equipment and reducing the limitations of the equipment during use, so that the safety of food packaging is also improved.

[0050] 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.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum packaging device for pet food, comprising a workbench (1), wherein a vacuum cover (2) is movable on the workbench (1); characterized in that: Two connecting rods (3) are movably provided on both sides of the workbench (1), and the connecting rods (3) are movably connected to the side of the vacuum cover (2), and the two connecting rods (3) are arranged in parallel; A fixing base plate (4) is also provided on the side of the connecting rod (3) away from the vacuum cover (2), and a guide screw assembly is provided on the fixing base plate (4), and the guide screw assembly is used to limit the movement of the vacuum cover (2) so that it moves along a specified direction; the guide screw assembly comprises a guide arc column (5) provided on the fixing base plate (4), and an arc-shaped square tube (6) is slidably provided on the guide arc column (5), and air holes (7) are provided on the opposite surfaces of the two arc-shaped square tubes (6) on one side of the workbench (1), and a pressurized sealing unit is provided on the air holes (7); when the workbench (1) and the vacuum cover (2) are closed, the sealing property of the connection between the two is enhanced by the pressurized sealing unit; The pressurized closed unit comprises a first L-tube (8), the air inlet end of the first L-tube (8) is arranged on the arc-shaped square tube (6) and is connected to the air vent (7); the air outlet end of the first L-tube (8) is connected to a second L-tube (9); both sides of the workbench (1) are fixed with gas-making square boxes (10), and the outlets of the two second L-tubes (9) on both sides of the workbench (1) are connected to the bottom surface of the gas-making square box (10); and air inlet valves (11) are symmetrically arranged on opposite surfaces of the two gas-making square boxes (10); The two sides of the gas-making box (10) are provided with connecting valves (12), and the two connecting valves (12) are both provided with bent pipes (13), and the output ends of the bent pipes (13) face the vacuum cover (2); a pressurizing column (14) is slidably mounted on the output ends of the bent pipes (13); U-shaped bases (15) are installed on both sides of the workbench (1), and the two U-shaped bases (15) are both facing the workbench (1); limiting cylinders (16) are symmetrically arranged on opposite surfaces of the two U-shaped bases (15); the two limiting cylinders (16) on one side of the workbench (1) are slidably arranged together to form a limiting horizontal block (17); a handle (18) is installed on the side of the limiting horizontal block (17) away from the workbench (1); two limiting arc blocks (19) are installed on the top surface of the limiting horizontal block (17), and the two limiting arc blocks (19) on one side of the workbench (1) are respectively located on the side surfaces of the two arc-shaped square tubes (6) on the side; a limiting plug rod (20) is installed on the side of the limiting arc block (19) close to the arc-shaped square tube (6); a plurality of limiting slots (21) are arranged on the side of the guide arc column (5), and the limiting plug rod (20) passes through the arc-shaped square tube (6) and is connected to the limiting slots (21).

2. The pet food vacuum packaging equipment according to claim 1, characterized in that: A limiting spring (22) is sleeved on the limiting cylinder (16), one end of the limiting spring (22) is connected to the limiting horizontal block (17), and the other end is connected to the limiting circular plate (23), and the limiting circular plate (23) is arranged at the end of the limiting cylinder (16) away from the U-shaped base (15); an arc spring (24) is arranged in the arc-shaped square tube (6), one end of the arc spring (24) is connected to the guide arc column (5), and the other end is connected to the inner bottom surface of the arc-shaped square tube (6).

3. The pet food vacuum packaging equipment according to claim 1, characterized in that: The two guide arc columns (5) respectively provided on both sides of the vacuum cover (2) are respectively arranged at relative positions of two fixing base plates (4) on one side of the vacuum cover (2); one end of the arc-shaped square tube (6) is an open end, and the other end is a closed end; a guide base (25) is installed on the closed end of the arc-shaped square tube (6), and the guide base (25) is fixed on the workbench (1).

4. The pet food vacuum packaging equipment according to claim 1, characterized in that: Processing chambers (26) are symmetrically arranged on the top surface of the workbench (1), and the vacuum cover (2) fits with one of the processing chambers (26) during movement; pressurized circular grooves (27) are also symmetrically arranged on the top surface of the workbench (1), and the size of the pressurized circular grooves (27) is larger than the processing chamber (26); circular pressurizing blocks (28) are slidably arranged on the two pressurized circular grooves (27), and the side of the circular pressurizing blocks (28) close to the bending pipe (13) is connected to the pressurizing column (14); a plurality of pressurizing springs (29) are arranged in the pressurizing circular grooves (27), one end of the pressurizing springs (29) is connected to the circular pressurizing block (28), and the other end is connected to the inner bottom surface of the pressurizing circular groove (27).

5. The pet food vacuum packaging equipment according to claim 1, characterized in that: The bent pipeline (13) is also provided with a gas cooler; the gas cooler also includes a connecting hole (30) provided on the bent pipeline (13), and a control valve (31) is provided on the connecting hole (30); the bent pipeline (13) is also provided with a gas L-tube (32), and the gas L-tube (32) is connected to the connecting hole (30).

6. The pet food vacuum packaging equipment according to claim 5, characterized in that: A cooling nozzle (33) is rotatably mounted on the output end of the gas production L-tube (32), and the output end of the cooling nozzle (33) faces the processing chamber (26); an auxiliary base (34) is mounted on the workbench (1), and the auxiliary base (34) is connected to the gas production L-tube (32) and the cooling nozzle (33).

7. The pet food vacuum packaging equipment according to claim 1, characterized in that: A locking circular groove (35) is provided on one side of the vacuum cover (2) close to the workbench (1); the locking circular groove (35) has the same size as the pressurizing circular groove (27); and the locking circular groove (35) is located on the moving path of the circular pressurizing block (28).

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