Vacuum pumping device of stretch film packaging machine

Abstract

The utility model relates to the technical field of stretch film packaging machines, in particular to a vacuum pumping device of a stretch film packaging machine, which is characterized in that the output end of a vacuum pumping component is communicated with a vacuum pump, and the vacuum pump is started, so that the interior of a vacuum cover is quickly vacuumized by the vacuum pumping component, and the vacuum packaging efficiency is improved; comprising a vacuum cover and a sealing strip, the sealing strip is arranged at the bottom end of the vacuum cover, the device further comprises a vacuumizing assembly and a non-return assembly, the vacuumizing assembly is arranged on the vacuum cover, and the non-return assembly is arranged on the vacuumizing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of stretch film packaging machines, in particular to a vacuum extraction device for stretch film packaging machines. Background Art

[0002] Stretch film packaging machine, also known as film wrapping machine, or stretch film wrapping packaging machine, is a packaging machine that realizes mechanized film wrapping instead of manual film wrapping, and uses stretch film to wrap products under a certain tension. It is often used to wrap products accumulated on pallets or shallow plates together with pallets or shallow plates. When using stretch film packaging machines to package items, such as some special items, such as food and oxidizable items, the stretch film packaging machine wraps both sides of the product with two layers of film, and at the same time vacuums and bonds through a vacuum system, and then packages the product, so that the film is tightly attached to the surface of the item to isolate the air.

[0003] At present, most vacuum sealing molds of domestic stretch film vacuum machines use round holes in the front and back of the mold to extract vacuum. Due to the location and space, the vacuum extraction channel is limited. To complete the vacuum extraction in a larger step mold, the time must be extended. Due to the airtightness of the equipment material, only limited vacuum can be achieved, which shortens the shelf life of the product. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a vacuum extraction device for a stretch film packaging machine which improves processing efficiency.

[0005] The utility model discloses a vacuum extraction device for a stretch film packaging machine, comprising a vacuum cover and a sealing strip, wherein the sealing strip is arranged at the bottom end of the vacuum cover, and further comprising a vacuum extraction component and a non-return component, wherein the vacuum cover is provided with a vacuum extraction component, and the non-return component is arranged on the vacuum extraction component; the output end of the vacuum extraction component is connected with a vacuum pump, and the vacuum pump is started, so that the vacuum extraction component can quickly perform a vacuum extraction operation on the inside of the vacuum cover, thereby improving the vacuum packaging efficiency.

[0006] Preferably, the vacuum assembly includes grooves, circular holes, air suction pipes, air suction heads, air supply pipes, three-way pipes, hoses and a fixing frame assembly. Two groups of grooves are arranged at the top of the interior of the vacuum hood, a group of circular holes are arranged at the top of each group of grooves, a group of air suction pipes are fixedly installed in each group of grooves through the fixing frame assembly, multiple groups of air suction heads are arranged at the bottom of each group of air suction pipes, a group of air supply pipes are arranged at the top of each group of air suction pipes, a group of air supply pipes are passed through each group of circular holes, the output ends of the two groups of air supply pipes are respectively connected with the two groups of input ends of the three-way pipe, the output end of the three-way pipe is connected with the input end of the hose, and a group of check assemblies are respectively arranged on each group of air supply pipes; the output end of the hose is connected with the input end of the vacuum pump, and the vacuum pump is started, so that the multiple groups of air suction heads on the two groups of air suction pipes cooperate with each other to perform rapid vacuuming operations on the interior of the vacuum hood, thereby shortening the vacuuming time, increasing the equipment operation speed, and improving the packaging efficiency of the product.

[0007] Preferably, the check assembly includes a box body, a light bar, a spring, a movable plate and a sealing gasket. A box body is arranged on the air supply pipe, two groups of light bars are arranged inside the box body, and the movable plate is slidably installed on the two groups of light bars. A spring is arranged on the end of the movable plate close to the three-way pipe, and the spring is sleeved on the outside of the light bar. A sealing gasket is arranged on the end of the movable plate away from the three-way pipe. Start the vacuum pump, and the movable plate and the sealing gasket approach the direction of the three-way pipe under the action of the pressure difference, so as to perform vacuum operation on the air inside the vacuum cover. When air leakage occurs between the three-way pipe and the hose, the movable plate and the sealing gasket seal the air supply pipe under the action of the spring elastic force to prevent air backflow and improve the protectiveness.

[0008] Preferably, the fixing frame assembly includes a fixing frame, a circular opening and a bolt. The fixing frame is provided with a circular opening, and the bolt is passed through the circular opening. The fixing frame is mounted on the outer wall of the exhaust pipe, and then the bolt is passed through the circular opening and threadedly connected to the vacuum cover, thereby completing the fixation of the exhaust pipe and improving the convenience of disassembly and installation.

[0009] Preferably, it also includes an anti-skid pad, and the inner wall of the fixing frame is provided with an anti-skid pad; the fixing frame clamps and fixes the exhaust pipe through the anti-skid pad to improve the firmness.

[0010] Preferably, it also includes a sealing sleeve, which is arranged between the outer wall of the gas pipe and the inner wall of the circular hole; the sealing sleeve seals the gap between the gas pipe and the circular hole to prevent air leakage.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the output end of the vacuum pump is connected to the vacuum pump, and the vacuum pump is started, so that the vacuum pump can quickly perform a vacuum operation on the inside of the vacuum cover, thereby improving the vacuum packaging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0013] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0015] Figure 4 yes Figure 3 A partial enlarged structural diagram of the middle part;

[0016] Figure 5 It is an enlarged structural schematic diagram of structures such as a fixing frame and an anti-slip pad;

[0017] Figure 6 It is an enlarged structural diagram of structures such as the box body and the movable plate.

[0018] Markings in the attached figure: 1. vacuum cover; 2. sealing strip; 3. groove; 4. round hole; 5. exhaust pipe; 6. exhaust head; 7. air supply pipe; 8. three-way pipe; 9. hose; 10. box body; 11. light bar; 12. spring; 13. movable plate; 14. sealing gasket; 15. fixing frame; 16. round mouth; 17. bolt; 18. anti-slip pad. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example 1

[0020] like Figures 1 to 6 As shown, a vacuum extraction device for a stretch film packaging machine of the utility model comprises a vacuum cover 1 and a sealing strip 2, wherein the sealing strip 2 is arranged at the bottom end of the vacuum cover 1, and further comprises a vacuum extraction component and a non-return component, wherein the vacuum cover 1 is provided with a vacuum extraction component, and the non-return component is arranged on the vacuum extraction component;

[0021] like Figure 1 , Figure 2 ,and Figure 3As shown, the vacuum assembly includes grooves 3, circular holes 4, air extraction pipes 5, air extraction heads 6, air supply pipes 7, three-way pipes 8, hoses 9 and a fixing frame assembly. Two groups of grooves 3 are arranged at the top of the vacuum cover 1. A group of circular holes 4 are arranged at the top of each group of grooves 3. A group of air extraction pipes 5 are fixedly installed in each group of grooves 3 through a fixing frame assembly. Multiple groups of air extraction heads 6 are arranged at the bottom of each group of air extraction pipes 5. A group of air supply pipes 7 are arranged at the top of each group of air extraction pipes 5. A group of air supply pipes 7 are respectively penetrated by each group of circular holes 4. The output ends of the two groups of air supply pipes 7 are respectively connected with the two groups of input ends of the three-way pipe 8. The output end of the three-way pipe 8 is connected with the input end of the hose 9. A group of check components are respectively arranged on each group of air supply pipes 7.

[0022] like Figure 6 As shown, the check assembly includes a box body 10, a light bar 11, a spring 12, a movable plate 13 and a sealing gasket 14. The box body 10 is arranged on the gas supply pipe 7, and two groups of light bars 11 are arranged inside the box body 10. The movable plate 13 is slidably installed on the two groups of light bars 11. The spring 12 is arranged on the end of the movable plate 13 close to the three-way pipe 8, and the spring 12 is mounted on the outside of the light bar 11. The sealing gasket 14 is arranged on the end of the movable plate 13 away from the three-way pipe 8.

[0023] In this embodiment, the output end of the hose 9 is connected to the input end of the vacuum pump, and the vacuum pump is started, so that the multiple groups of vacuum heads 6 on the two groups of vacuum pipes 5 cooperate with each other to quickly evacuate the inside of the vacuum cover 1, shortening the vacuum time. The vacuum pump is started, and the movable plate 13 and the sealing gasket 14 approach the direction of the three-way pipe 8 under the action of the pressure difference, thereby performing a vacuum operation on the air inside the vacuum cover 1. When an air leak occurs between the three-way pipe 8 and the hose 9, the movable plate 13 and the sealing gasket 14 seal the air supply pipe 7 under the action of the elastic force of the spring 12 to prevent air backflow and improve protection. Example 2

[0024] like Figures 1 to 6 As shown, a vacuum extraction device for a stretch film packaging machine of the utility model comprises a vacuum cover 1 and a sealing strip 2, wherein the sealing strip 2 is arranged at the bottom end of the vacuum cover 1, and further comprises a vacuum extraction component and a non-return component, wherein the vacuum cover 1 is provided with a vacuum extraction component, and the non-return component is arranged on the vacuum extraction component;

[0025] like Figure 1 , Figure 2 ,and Figure 3As shown, the vacuum assembly includes grooves 3, circular holes 4, air extraction pipes 5, air extraction heads 6, air supply pipes 7, three-way pipes 8, hoses 9 and a fixing frame assembly. Two groups of grooves 3 are arranged at the top of the vacuum cover 1. A group of circular holes 4 are arranged at the top of each group of grooves 3. A group of air extraction pipes 5 are fixedly installed in each group of grooves 3 through a fixing frame assembly. Multiple groups of air extraction heads 6 are arranged at the bottom of each group of air extraction pipes 5. A group of air supply pipes 7 are arranged at the top of each group of air extraction pipes 5. A group of air supply pipes 7 are respectively penetrated by each group of circular holes 4. The output ends of the two groups of air supply pipes 7 are respectively connected with the two groups of input ends of the three-way pipe 8. The output end of the three-way pipe 8 is connected with the input end of the hose 9. A group of check components are respectively arranged on each group of air supply pipes 7.

[0026] like Figure 6 As shown, the non-return assembly includes a box body 10, a light bar 11, a spring 12, a movable plate 13 and a sealing gasket 14. The box body 10 is arranged on the gas delivery pipe 7, two groups of light bars 11 are arranged inside the box body 10, and the movable plate 13 is slidably mounted on the two groups of light bars 11. The end of the movable plate 13 close to the three-way pipe 8 is provided with a spring 12, and the spring 12 is sleeved on the outside of the light bar 11. The end of the movable plate 13 away from the three-way pipe 8 is provided with a sealing gasket 14;

[0027] like Figure 4 and Figure 5 As shown, the fixing frame assembly includes a fixing frame 15, a round opening 16 and a bolt 17. The fixing frame 15 is provided with a round opening 16, and the bolt 17 is passed through the round opening 16;

[0028] The fixing frame 15 further comprises an anti-skid pad 18 , and the inner side wall of the fixing frame 15 is provided with an anti-skid pad 18 .

[0029] In this embodiment, the fixing frame 15 is mounted on the outer wall of the exhaust pipe 5, and then the bolt 17 is passed through the circular opening 16 and threadedly connected to the vacuum cover 1, thereby completing the fixation of the exhaust pipe 5. The output end of the hose 9 is connected to the input end of the vacuum pump, and the vacuum pump is started, so that the multiple groups of exhaust heads 6 on the two groups of exhaust pipes 5 cooperate with each other to quickly evacuate the inside of the vacuum cover 1, shortening the vacuum time. The vacuum pump is started, and the movable plate 13 and the sealing gasket 14 approach the direction of the three-way pipe 8 under the action of the pressure difference, thereby performing a vacuum operation on the air inside the vacuum cover 1. When an air leak occurs between the three-way pipe 8 and the hose 9, the movable plate 13 and the sealing gasket 14 seal the air supply pipe 7 under the action of the elastic force of the spring 12 to prevent air backflow and improve protection.

[0030] The round mouth 16 of the vacuum extraction device of a stretch film packaging machine of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for creative labor by technicians in the field.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum extraction device for a stretch film packaging machine, comprising a vacuum cover (1) and a sealing strip (2), wherein the sealing strip (2) is arranged at the bottom end of the vacuum cover (1), and characterized in that: It also comprises a vacuum pumping component and a non-return component. The vacuum cover (1) is provided with a vacuum pumping component, and the non-return component is provided on the vacuum pumping component.

2. A vacuum extraction device for a stretch film packaging machine as claimed in claim 1, characterized in that: The vacuum pumping assembly comprises a groove (3), a circular hole (4), an air extraction pipe (5), an air extraction head (6), an air supply pipe (7), a three-way pipe (8), a hose (9) and a fixing frame assembly. Two groups of grooves (3) are arranged at the top of the vacuum cover (1). A group of circular holes (4) are arranged at the top of each group of grooves (3). A group of air extraction pipes (5) are fixedly installed in each group of grooves (3) through the fixing frame assembly. A plurality of air extraction heads (6) are arranged at the bottom of each group of air extraction pipes (5). A group of air supply pipes (7) are arranged at the top of each group of air extraction pipes (5). A group of air supply pipes (7) are passed through each group of circular holes (4). The output ends of the two groups of air supply pipes (7) are respectively connected to the two groups of input ends of the three-way pipe (8). The output end of the three-way pipe (8) is connected to the input end of the hose (9). A group of check components are respectively arranged on each group of air supply pipes (7).

3. A vacuum extraction device for a stretch film packaging machine as claimed in claim 2, characterized in that: The non-return assembly comprises a box body (10), a light bar (11), a spring (12), a movable plate (13) and a sealing gasket (14). The box body (10) is arranged on the gas transmission pipe (7), two groups of light bars (11) are arranged inside the box body (10), and the movable plate (13) is slidably mounted on the two groups of light bars (11). The spring (12) is arranged at one end of the movable plate (13) close to the three-way pipe (8), and the spring (12) is sleeved on the outside of the light bar (11). The sealing gasket (14) is arranged at one end of the movable plate (13) away from the three-way pipe (8).

4. A vacuum extraction device for a stretch film packaging machine as claimed in claim 2, characterized in that: The fixing frame assembly comprises a fixing frame (15), a circular opening (16) and a bolt (17). The fixing frame (15) is provided with a circular opening (16), and the bolt (17) is passed through the circular opening (16).

5. A vacuum extraction device for a stretch film packaging machine as claimed in claim 4, characterized in that: It also includes an anti-skid pad (18), and the inner side wall of the fixing frame (15) is provided with an anti-skid pad (18).

6. A vacuum extraction device for a stretch film packaging machine as claimed in claim 2, characterized in that: It also comprises a sealing sleeve, which is arranged between the outer wall of the gas delivery pipe (7) and the inner wall of the circular hole (4).

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