Cavity-type vacuum sealing machine

Abstract

The utility model discloses a cavity-type vacuum sealing machine, comprising a machine body and a cover which covers the machine body. The machine body is internally provided with a tray; an airtight cavity for holding packaging bags is formed between the tray and the cover; the cavity is internally provided with a hot-pressing bar and a heating and sealing component for sealing the packaging bags; the machine body is internally provided with a vacuum pump set for vacuumization; and the suction ports of the vacuum pump set communicate with the airtight cavity for holding the packaging bags via tubes. The cavity-type vacuum machine disclosed by the utility model has the advantages of smaller volume and small occupied space.

Claims

1. A cavity-type vacuum sealing machine, comprising a machine body (1) and a cover (2) which covers the machine body, characterized in that the machine body is internally provided with a tray (3); an airtight cavity for holding packaging bags is formed between the tray and the cover; the cavity is internally provided with a hot-pressing bar (5) and a heating and sealing component (6) for sealing the packaging bags; the machine body is internally provided with a vacuum pump set (4) for vacuumization; and suction ports of the vacuum pump set communicate with the airtight cavity for holding the packaging bags; the vacuum pump set (4) is a vacuum pump, comprising a housing, a driver (402) and air pumps (404) driven by the driver; the driver (402) is a dual-head motor; output shafts (4021) at two ends of the motor are connected with eccentric wheels (403); four air pumps (404) are arranged; one eccentric wheel is connected with two air pumps; each air pump is connected with a suction port (406) of the suction ports and an exhaust port (407), which communicate with the air pump; and one-way valves (405) are arranged between the suction ports and the air pumps and between the exhaust ports and the air pumps.

2. The cavity-type vacuum sealing machine according to claim 1, wherein the machine body is internally provided with a rolled bag chamber for holding rolled bags; the rolled bag chamber is located in a front part of the machine body (1); and a front side of the machine body is provided with a chamber door (9) for opening the rolled bag chamber.

3. The cavity-type vacuum sealing machine according to claim 2, wherein a bottom side of the tray (3) is an oblique plane and mouths of the packaging bags in the cavity are located on top side of the oblique plane.

4. The cavity-type vacuum sealing machine according to claim 3, wherein a connecting rod (7) is arranged between the cover (2) and the machine body (1) and two ends of the connecting rod are respectively hinged with the cover and the machine body.

5. The cavity-type vacuum sealing machine according to claim 4, wherein the cover (2) comprises an upper cover (21) and a lower cover (22) which fit together, and a control panel (10) is arranged on the upper cover.

6. The cavity-type vacuum sealing machine according to claim 5, wherein the machine body (1) is provided with a safety switch (8) and is actuated through the connecting rod.

7. The cavity-type vacuum sealing machine according to claim 1, wherein each air pump (404) comprises a connecting rod (4041), a piston (4042) connected with the connecting rod and a cylinder (4043) having an air cavity; a head of the connecting rod is connected to an eccentric position of the eccentric wheel; and the cylinder is provided with a cylinder bottom cover, which is provided with a suction passage and an exhaust passage.

8. The cavity-type vacuum sealing machine according to claim 7, wherein each one-way valve (405) comprises a valve (4051) and a valve bottom cover (4052); the valve is located between the cylinder bottom cover and the valve bottom cover; the valve is provided with two air-blocking pads (511) which are respectively located at the suction passage and the exhaust passage; and the valve bottom cover is provided with air passages, which respectively communicate with the suction ports (406) and the exhaust ports (407).

9. The cavity-type vacuum sealing machine according to claim 8, wherein the housing comprises an upper cover (4011) and a lower cover (4012), which are buckled with each other.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is the three-dimensional structure diagram of the utility model.

(2) FIG. 2 is the cross-sectional structure diagram of the utility model.

(3) FIG. 3 is the breakdown structure diagram of the parts of the utility model.

(4) FIG. 4 is the state structure diagram of the utility model when the cover is closed.

(5) FIG. 5 is the state structure diagram of the utility model when the cover is open.

(6) FIG. 6 is the three-dimensional structure diagram of the vacuum pump of the utility model.

(7) FIG. 7 is the cross-sectional structure diagram of the vacuum pump of the utility model.

(8) FIG. 8 is the breakdown structure diagram of the parts of the vacuum pump of the utility model.

(9) FIG. 9 is the breakdown structure diagram of the parts of the utility model at the air pumps and the valves.

DETAILED DESCRIPTION OF THE INVENTION

(10) To facilitate the understanding of the technicians in the field, the utility model is further described with the following drawings.

(11) As shown in FIG. 1, FIG. 2 and FIG. 3, a cavity-type vacuum sealing machine comprises a machine body 1 and a cover 2 which covers the machine body. The cover 2 comprises an upper cover 21 and a lower cover 22, which fit together; and a control panel 10 is arranged on the upper cover 21. The machine body 1 is internally provided with a tray 3; an airtight cavity for holding the packaging bags is formed between the tray 3 and the cover 1; and the cavity is internally provided with a hot-pressing bar 5 and a heating and sealing component 6 for sealing the packaging bags. The bottom side of the tray 3 is an oblique plane; the mouth of the packaging bag is located at the top of the oblique plane. While being sealed, the packaging bag is arranged on a slant on the tray 3; if the packaging bag contains liquid, the liquid flows from the bottom side of the tray 3 to the bag bottom, so that too much liquid attached on the mouth of the bag is avoided. The hot-pressing bar 5 and the heating and sealing component 6 are capable of evaporating a small amount of liquid at the mouth of the packaging bag to be sealed, and then the packaging bag is sealed, so that the sealing quality is guaranteed. The rolled bag chamber is located in the front of the machine body 1.

(12) As shown in FIG. 4 and FIG. 5, a connecting rod 7 is arranged between the cover 2 and the machine body 1 and two ends of the connecting rod 7 are respectively hinged with the cover 2 and the machine body 1. The machine body 1 is provided with the safety switch 8 and the safety switch 8 is located at the location of the connecting rod 7 and actuated through the connecting rod 7. When the cover 2 is closed, the connecting rod 7 contacts with the safety switch 8, the circuit of the machine is closed and the machine can work normally. When the cover 2 is open, the connecting rod 7 is far away from the safety switch 8 and the circuit of the machine is cut off to prevent the occurrence of accidents.

(13) As shown in FIG. 6-9, the machine body 1 is internally provided with a rolled bag chamber for holding rolled bags 11 and a vacuum pump set 4 for vacuumization; and the suction ports of the vacuum pump set 4 communicate with the airtight cavity for holding the packaging bag. The vacuum pump set 4 comprises a vacuum pump, comprising a housing, a driver 402 and air pumps 404 driven by the driver 402. The housing 4011 comprises an upper cover 4011 and a lower cover 4012, which are buckled with each other to enclose the driver 402 and the air pumps 404. The driver 402 and the air pumps 404 are connected through eccentric wheels 403; the air pumps 404 are connected with suction ports 406 and exhaust ports 407, which communicate with the air pumps; one-way valves 405 are arranged between the suction ports 406 and the air pumps 404 and between the exhaust ports 407 and the air pumps 404; the suction ports 406 are used for pumping air in the packaging bag, the exhaust ports 407 are used for discharging air pumped by the air pumps 404, and the one-way valves 405 are used for preventing the air exhaustion of the suction passages and the air intake of the exhaust passages. The driver 402 is a dual-head motor; output shafts 4021 at two ends of the motor are connected with the eccentric wheels 403; four air pumps 404 are arranged; one eccentric wheel 403 are connected with two air pumps 404; each air pump 404 is connected with the suction port 406 and the exhaust port 407, that is, one dual-head motor drives four air pumps 4 to work at the same time.

(14) The air pump 404 comprises a connecting rod 4041, a piston 4042 connected with the connecting rod 4041 and a cylinder 4043 having an air cavity; the head of the connecting rod 4041 is connected to the eccentric position of the eccentric wheel 403; the cylinder 4043 is provided with a cylinder bottom cover, which is provided with the suction passage and the exhaust passage. The one-way valve 405 comprises a valve 4051 and a valve bottom cover 4052; the valve 4051 is located between the cylinder bottom cover 4043 and the valve bottom cover 4052; the valve 4051 is provided with two air-blocking pads 511, which are respectively located at the suction passages and the exhaust passages and the air-blocking pads 511 are used to unidirectionally close the suction passage and the exhaust passage, that is, the suction passage cannot exhaust air and the exhaust passage cannot intake air. The valve bottom covers 4052 are provided with air passages, which respectively communicate with the suction ports 406 and the exhaust ports 407. The cylinders 4043 are provided with raised structures 40431; the housing 1 is provided with concave holes 4013 matched with the raised structures 40431; and the cylinders 4043 are clamped in the concave holes 4013 through the raised structures 40431 and fixed in the housing 1.

(15) The working process of the embodiment is as follows: the dual-head motor is started to drive the eccentric wheels 403 at two ends of the dual-head motor to rotate and then drive the four connecting rods 4041 to reciprocate; the connecting rods 4041 drives the pistons 4042 to reciprocate in the cylinders 4043, so that the volumes of the internal cavities of the cylinders 4043 are changed and the air suction and the air exhaustion are realized; during air suction, one air-blocking pad 511 closes the exhaust passage and the air is pumped from the suction port 406 to the pump; during air exhaustion, the other air-blocking pad 511 closes the suction passage and the air is discharged from the exhaust port 407. The vacuum pump has four air pumps 404; the air pumps 404 can be connected in series to boost the pumping pressure, can be connected in parallel to accelerate the pumping speed or can be used in a serial-parallel connection to achieve the actual use requirements. One driver drives four air pumps to work synchronously, so that the pumping pressure is boosted and the vacuum degree is improved.

(16) The front side of the machine body 1 is provided with a chamber door 9 for opening the rolled bag chamber; and the rolled bag 11 is replaced by opening the chamber door 9, so that the rolled bag 11 is more convenient to be handled.

(17) In the embodiment, the rolled bag 11 is replaced through the chamber door 9; the packaging bag for packing products is drawn from the rolled bag 11; after the product is packed, the packaging bag is delivered to the tray 3 and then is vacuumized and sealed.

(18) The embodiment is the better implementation mode of the utility model and is not the limit to the utility model. Without getting out of the inventive concept of the utility model, any obvious replacement is within the protective scope of the utility model.