A vacuum sealing machine with improved pressure relief locking force

Abstract

The utility model discloses a vacuum sealer with improved pressure relief locking force. A pressure relief device is arranged on an air pipe assembly. The pressure relief device includes a pressure relief seat and an elastic seal. The pressure relief seat is arranged on the air pipe assembly. A pressure relief port is provided on one side of the pressure relief seat. The elastic seal passes through the pressure relief port and is inserted into the pressure relief seat. A sealing plug is arranged on the outer end of the elastic seal. The sealing plug protrudes from the pressure relief port. The outer diameter of the sealing plug is larger than the inner diameter of the pressure relief port. The sealing plug is matched with a seat body or a cover body. When the cover is opened, the elastic seal is separated from the pressure relief seat or there is a pressure relief gap between the elastic seal and the pressure relief seat. The structure is simple, the cost is low, and the space occupation is reduced. When vacuum sealing is performed, the cover body is pressed against the seat body, so that the elastic seal seals the pressure relief port. The elastic seal is sealed by the snapping force of the seat body and the cover body, thereby improving the pressure relief locking force of the vacuum sealer, preventing accidental air leakage and pressure relief during the pressure holding stage, and improving stability and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum sealing machines, in particular to a vacuum sealing machine with improved pressure relief locking force. Background Art

[0002] The vacuum sealing machine includes a lower seat and an upper seat hinged to the rear side of the lower seat, a heating strip for heat sealing is arranged on the front side of the lower cover, a vacuum groove is arranged on the rear side of the heating strip, the bag opening of the vacuum packaging bag is inserted into the vacuum groove, and the vacuum groove is sealed when the upper seat cover is closed on the lower seat, and the vacuum groove is evacuated by an air pump to evacuate the vacuum packaging bag, and after the vacuum is completed, the vacuum packaging bag is heat-sealed by the heating strip. After the vacuum sealing is completed, in order to facilitate the opening of the upper seat, it is often necessary to relieve the pressure of the vacuum tank. Some vacuum sealing machines also inflate and deflate the air bag to drive the heating strip to rise and fall or drive the air bag to seal the bag mouth. When the vacuum sealing is completed, the air bag also needs to be relieved. The pressure relief mechanism of the existing vacuum sealing machine usually requires an additional pressure relief pipe to be connected to the air pipe assembly through a three-way connector, and then the pressure relief pipe or the sealing gasket is driven to move relatively to relieve and maintain pressure. The sealing gasket or the pressure relief pipe is compressed by the elastic force of the spring. However, the elastic force of the spring is limited, so there is a pressure between the sealing gasket and the pressure relief pipe. The clamping force is small, resulting in a small pressure relief locking force, which makes it easy for a gap to appear between the sealing gasket and the pressure relief tube, resulting in a decrease in the sealing performance and failure to maintain pressure. In particular, for vacuum sealing machines that use air bags to drive the heating strip to rise and fall or drive the air bags to seal the bag mouth, the air bags need to be inflated. When the positive pressure in the air bags is greater than the pressure relief locking force of the spring, it will cause accidental air leakage and pressure relief, and the reliability and stability are poor. In addition, the traditional pressure relief mechanism requires an additional driving mechanism to drive the pressure relief tube or the sealing gasket, which has a complex structure, high cost, and requires a large installation space. Therefore, it is necessary to improve it. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a vacuum sealing machine with improved pressure relief locking force, improve the pressure relief locking force of the vacuum sealing machine, prevent accidental air leakage and pressure relief during the pressure maintaining stage, improve stability and reliability, simplify the structure, reduce costs, and reduce space occupancy.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a vacuum sealing machine with improved pressure relief locking force, comprising a seat body, a cover body, a sealing device and a vacuum device, the cover body is rotatably installed on the upper part of the seat body, the vacuum device is arranged inside the seat body, the sealing device is arranged at the front part of the seat body and / or the cover body, a vacuum groove is arranged on the rear side of the sealing device, the vacuum device is connected to the sealing device and / or the vacuum groove through an air pipe assembly, a pressure relief device is arranged on the air pipe assembly, the pressure relief device comprises a pressure relief seat and an elastic sealing member, the pressure relief seat is arranged on the air pipe assembly, a pressure relief port is opened on one side of the pressure relief seat, the elastic sealing member passes through the pressure relief port and is inserted into the pressure relief seat, a sealing plug is arranged on the outer end part of the elastic sealing member, the sealing plug protrudes from the pressure relief port, the outer diameter of the sealing plug is larger than the inner diameter of the pressure relief port, the sealing plug is matched with the seat body or the cover body, and when the cover is opened, the elastic sealing member is separated from the pressure relief seat or there is a pressure relief gap between the elastic sealing member and the pressure relief seat.

[0005] In a further technical solution, a mounting groove with an opening facing downward is provided at the lower part of the cover body, the pressure relief seat is fixedly installed in the mounting groove, the pressure relief port is provided at the lower part of the pressure relief seat, the sealing plug is provided at the lower part of the elastic seal, and a connecting part is provided at the upper part of the elastic seal. The connecting part passes through the pressure relief port and is fixedly connected or slidably connected to the upper part of the pressure relief seat, the pressure relief part abuts against the upper part of the seat body, and a pressure relief gap is provided between the elastic seal and the pressure relief seat when the cover is opened.

[0006] In a further technical solution, an annular groove is opened on the outer wall of the connecting part along the circumferential direction, a mounting hole penetrating the pressure relief seat is opened on the upper part of the pressure relief seat, the connecting part is inserted into the mounting hole, and the inner wall of the annular groove is limitedly matched with the mounting hole.

[0007] In a further technical solution, the length of the annular groove is greater than the length of the mounting hole, and the connecting portion and the annular groove are slidably matched up and down.

[0008] In a further technical solution, the upper inner diameter of the pressure relief port is smaller than the lower inner diameter of the pressure relief port to form a conical pressure relief port, the upper part of the sealing plug is provided with a conical sealing portion corresponding to the pressure relief port, and the lower part of the sealing plug is provided with a circular sealing portion, the outer wall of the conical sealing portion is abutted against the inner wall of the pressure relief port, and the circular sealing portion is abutted against the lower end surface of the pressure relief seat.

[0009] In a further technical solution, a guide slide hole is opened below the mounting hole, the diameter of the guide slide hole is larger than the diameter of the mounting hole, the upper part of the elastic seal is slidably installed in the guide slide hole, the outer side wall of the upper part of the elastic seal is provided with a plurality of annular upper sealing rings at intervals along the vertical direction, and the outer side surface of the conical sealing part is provided with a plurality of annular lower sealing rings at intervals along the vertical direction, each upper sealing ring is respectively abutted against the inner wall of the guide slide hole, and each lower sealing ring is respectively abutted against the inner wall of the pressure relief port.

[0010] In a further technical solution, a traction column extends upward from the upper end of the connecting portion, and a guiding inclined surface inclined outward from top to bottom is provided between the traction column and the connecting portion.

[0011] In a further technical solution, the sealing device includes a heat-generating sealing component and a bag-pressing sealing component, the heat-generating sealing component is arranged at the front of the base body, the vacuum groove is arranged at the front of the base body and is located at the rear side of the heat-generating sealing component, and the bag-pressing sealing component is arranged at the front of the cover body and moves relative to and presses with the heat-generating sealing component;

[0012] The bag pressing and sealing assembly is provided with an air bag strip, the interior of the air bag strip is hollow, the vacuum device includes an air pump and an air pump, the air pump is connected to the vacuum groove, the air pump and the air bag strip are connected through an air pipe assembly, the side wall of the pressure relief seat is provided with two air pipe connecting columns, the two air pipe connecting columns are respectively provided with air holes connected to the inner cavity of the pressure relief seat, the air pipe assembly includes two connecting air pipes, one end of the two connecting air pipes are respectively connected to the two air pipe connecting columns, and the other end of the two connecting air pipes are respectively connected to the air bag strip and the air outlet interface of the air pump.

[0013] In a further technical solution, a locking mechanism is respectively provided on the left and right sides of the seat body, and the locking mechanism includes a locking slider and a return spring. The return spring is arranged on the inner side of the locking slider, and a lower locking buckle is arranged on the upper part of the locking slider. The corresponding upper locking buckles are respectively arranged on the left and right sides of the lower part of the cover body. The two lower locking buckles and the two upper locking buckles are respectively snap-fitted, and the lower part of the airbag strip is provided with an avoidance groove with an opening facing downward for avoiding the heating sealing component.

[0014] In a further technical solution, a control circuit is also provided inside the seat body, and the control circuit is electrically connected to the vacuum pump and the inflation pump respectively; an inflation switch is provided inside the seat body, and the inflation switch is electrically connected to the control circuit; a downwardly protruding inflation trigger block is provided at the lower part of the cover body, and a trigger through hole is provided at the upper part of the corresponding seat body; when the cover body and the seat body are pressed against each other, the elastic sealing member seals the pressure relief port, and the inflation trigger block passes through the trigger through hole and cooperates with the inflation switch trigger.

[0015] After adopting the above structure, the advantages of the utility model compared with the prior art are: the pressure relief device is arranged on the air pipe, and there is no need to use an additional three-way pressure relief pipe, the structure is simple, the cost is low, and the space occupancy is reduced; when vacuum sealing is performed, the cover body is pressed against the seat body, so that the elastic seal seals the pressure relief port, and the elastic seal is sealed by the snapping force of the seat body and the cover body, thereby improving the pressure relief locking force of the vacuum sealing machine, preventing accidental air leakage and pressure relief during the pressure holding stage, and improving stability and reliability; after the sealing is completed, the cover body is separated from the seat body, thereby separating the elastic seal from the pressure relief seat or generating a pressure relief gap to complete the pressure relief, and no independent pressure relief drive mechanism is required, and the pressure relief is completed while the cover is opened, the structure is simple, the cost is low, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 The utility model Figure 1 A magnified view of part A;

[0019] Figure 3 It is a state reference diagram of the utility model during vacuum sealing;

[0020] Figure 4 This is a reference diagram of the utility model when the cover is opened;

[0021] Figure 5 It is a connection schematic diagram of the pressure relief device of the utility model;

[0022] Figure 6 It is an exploded view of the pressure relief device of the utility model.

[0023] In the figure:

[0024] 1 seat body, 11 vacuum groove, 12 trigger perforation;

[0025] 2 cover body, 21 mounting slot, 22 inflatable trigger block;

[0026] 3. Air pump;

[0027] 4. Connect the trachea;

[0028] 5 pressure relief device, 51 pressure relief seat, 511 pressure relief port, 512 mounting hole, 513 guide sliding hole, 514 air pipe connecting column, 515 air hole, 52 elastic sealing member, 521 sealing plug, 5211 conical sealing portion, 5212 circular sealing portion, 5213 lower sealing ring, 522 annular groove, 523 upper sealing ring, 524 traction column, 525 guide inclined surface, 53 pressure relief gap;

[0029] 6 sealing device, 61 heating sealing component, 62 bag pressing sealing component, 621 air bag pressure strip, 622 avoidance groove, 63 inflation switch;

[0030] 71 is a locking slide block, 72 is an upper locking buckle, and 73 is a lower locking buckle. DETAILED DESCRIPTION

[0031] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

[0032] A vacuum sealer with improved pressure relief locking force, such as Figures 1 to 6As shown, it includes a base body 1, a cover body 2, a sealing device 6 and a vacuum device. The cover body 2 is rotatably mounted on the upper part of the base body 1, the vacuum device is arranged inside the base body 1, the sealing device 6 is arranged at the front of the base body 1 and / or the cover body 2, and a vacuum groove 11 is arranged on the rear side of the sealing device 6. The vacuum device is connected to the sealing device 6 and / or the vacuum groove 11 through an air pipe assembly. The air pipe assembly is provided with a pressure relief device 5, and the pressure relief device 5 includes a pressure relief seat 51 and an elastic sealing member 52. The pressure relief seat 51 is arranged on the air pipe assembly. On the pipe assembly, a pressure relief port 511 is provided on one side of the pressure relief seat 51, and the elastic seal 52 passes through the pressure relief port 511 and is inserted into the pressure relief seat 51. A sealing plug 521 is provided at the outer end of the elastic seal 52, and the sealing plug 521 protrudes from the pressure relief port 511. The outer diameter of the sealing plug 521 is larger than the inner diameter of the pressure relief port 511, and the sealing plug 521 is abutted against the seat body 1 or the cover body 2. When the cover is opened, the elastic seal 52 is separated from the pressure relief seat 51 or a pressure relief gap 53 is provided between the elastic seal 52 and the pressure relief seat 51.

[0033] The pressure relief device of the traditional vacuum sealing machine is to connect an additional pressure relief pipe to the air pipe through a tee, and then drive the pressure relief pipe or the sealing pad to move and separate relatively to achieve the purpose of pressure relief. The structure is complex, the cost is high, and it takes up a large installation space. When maintaining pressure, the pressure relief pipe or the sealing pad is reset by a spring so that the sealing pad seals the pressure relief pipe. Under negative pressure, the sealing pad can keep a close fit with the pressure relief pipe, but when inflating the vacuum packaging bag, inflating and deflation of the airbag to drive the heating strip to rise or fall, or driving When the airbag seals the bag opening, a positive pressure state will be generated. Under the positive pressure state, the sealing pad and the pressure relief pipe are pressed tightly by the elastic force of the spring as the pressure relief locking force. When the positive pressure is greater than the elastic force of the spring, a gap will appear between the sealing pad and the pressure relief pipe, resulting in failure of pressure maintenance and accidental pressure relief. The reliability and stability are poor, and the pressure maintenance capacity is poor. The pressure relief device 5 of the utility model is arranged on the trachea, and there is no need to use an additional three-way connection pressure relief pipe. The structure is simple, the cost is low, and the space occupation is reduced. Figure 3 As shown, when vacuum sealing is performed, the cover body 2 is pressed against the base body 1, so that the elastic seal 52 seals the pressure relief port 511. The elastic seal 52 is sealed by the snapping force between the base body 2 and the cover body 1, thereby improving the pressure relief locking force of the vacuum sealer, preventing accidental gas leakage and pressure relief during the pressure holding stage, and improving stability and reliability; Figure 4 As shown, after the sealing is completed, the cover body 2 is separated from the seat body 1, so that the elastic seal 52 is separated from the pressure relief seat 51 or a pressure relief gap 53 is generated to complete the pressure relief. No independent pressure relief drive mechanism is required, and the pressure relief is completed while the cover is opened. The structure is simple, the cost is low, and the operation is convenient.

[0034] Specifically, the lower part of the cover body 2 is provided with a mounting groove 21 with an opening facing downward, the pressure relief seat 51 is fixedly installed in the mounting groove 21, the pressure relief port 511 is provided at the lower part of the pressure relief seat 51, the sealing plug 521 is provided at the lower part of the elastic seal 52, and the upper part of the elastic seal 52 is provided with a connecting portion, the connecting portion passes through the pressure relief port 511 and is fixedly connected or slidably connected to the upper part of the pressure relief seat 51, the pressure relief portion is abutted against the upper part of the seat body 1, and a pressure relief gap 53 is provided between the elastic seal 52 and the pressure relief seat 51 when the cover is opened. When the elastic seal 52 always maintains connection with the pressure relief seat 51, there is no need to separate the elastic seal 52 from the pressure relief seat 51 during pressure relief, and the pressure relief seat 51 can protect the elastic seal 52, extend the service life of the elastic seal 52, and prevent the elastic seal 52 from deflecting during the insertion process into the pressure relief seat 51 when the cover is closed to maintain pressure, without the need for a guide mechanism, further improving reliability and stability. When pressure relief is performed, the elastic seal 52 moves downward or is elastically reset, so that a pressure relief gap 53 is generated between the elastic seal 52 and the pressure relief seat 51, and the pressure relief is completed.

[0035] Specifically, an annular groove 522 is formed on the outer wall of the connection part along the circumferential direction, a mounting hole 512 penetrating the pressure relief seat 51 is formed on the upper part of the pressure relief seat 51, the connection part is inserted into the mounting hole 512, and the inner wall of the annular groove 522 is limitedly matched with the mounting hole 512. The annular groove 522 and the mounting hole 512 limit the elastic seal 52 to prevent the elastic seal 52 from falling off, and the structure is simple and the cost is low.

[0036] When the length of the annular groove 522 is equal to the length of the mounting hole 512, the elastic seal 52 is fixedly mounted on the pressure relief seat 51. When the pressure is maintained, the seat body 1 presses against the elastic seal 52, so that the elastic seal 52 is compressed to deform and seal the pressure relief port 511. When the pressure is released, the seat body 1 is separated from the cover body 2, and the elastic seal 52 is elastically reset, thereby generating a pressure relief gap 53 for pressure relief.

[0037] When the length of the annular groove 522 is greater than the length of the mounting hole 512, the connecting portion and the annular groove 522 slide up and down to cooperate. The elastic seal 52 slides up and down and is installed on the pressure relief seat 51. When the pressure is maintained, the seat body 1 presses against the elastic seal 52, so that the elastic seal 52 moves upward and generates a certain elastic deformation to seal the pressure relief port 511. When the pressure is released, the seat body 1 is separated from the cover body 2, and the elastic seal 52 moves downward and elastically resets, thereby generating a pressure relief gap 53 for pressure relief. The elastic seal 52 can move relative to the pressure relief seat 51 to reduce the deformation degree of the elastic seal 52, increase the pressure relief gap 53, and increase the pressure relief speed.

[0038] Specifically, the inner diameter of the upper part of the pressure relief port 511 is smaller than the inner diameter of the lower part of the pressure relief port 511 to form a tapered pressure relief port 511. The upper part of the sealing plug 521 is provided with a tapered sealing portion 5211 corresponding to the pressure relief port 511, and the lower part of the sealing plug 521 is provided with a circular sealing portion 5212. The outer wall of the tapered sealing portion 5211 is abutted against the inner wall of the pressure relief port 511, and the circular sealing portion 5212 is abutted against the lower end surface of the pressure relief seat 51. When the pressure is maintained, the outer end of the pressure relief port 511 is sealed by the circular sealing portion 5212, and at the same time, the inner wall of the pressure relief port 511 is sealed by the tapered sealing portion 5211. The tapered pressure relief port 511 and the tapered sealing portion 5211 increase the contact area between the sealing plug 521 and the pressure relief port 511, further improving the sealing effect.

[0039] Specifically, a guide sliding hole 513 is provided below the mounting hole 512, the diameter of the guide sliding hole 513 is larger than the diameter of the mounting hole 512, the upper part of the elastic seal 52 is slidably installed in the guide sliding hole 513, a plurality of annular upper sealing rings 523 are arranged at intervals along the vertical direction on the outer side wall of the upper part of the elastic seal 52, a plurality of annular lower sealing rings 5213 are arranged at intervals along the vertical direction on the outer side surface of the conical sealing portion 5211, each upper sealing ring 523 is respectively abutted against the inner wall of the guide sliding hole 513, and each lower sealing ring 5213 is respectively abutted against the inner wall of the pressure relief port 511. The elastic seal 52 is guided by the guide sliding hole 513, and a step is formed between the guide sliding hole 513 and the mounting hole 512. The elastic seal 52 further improves the sealing effect of the mounting hole 512 through the step when maintaining pressure, prevents pressure relief caused by the mounting hole 512, and improves reliability and stability. A multi-layer seal is formed by the upper sealing ring 523 and the lower sealing ring 5213, thereby further improving the sealing effect.

[0040] Specifically, a traction column 524 extends upward from the upper end of the connection part, and a guide slope 525 inclined outward from top to bottom is provided between the traction column 524 and the connection part. When the pressure relief seat 51 and the elastic seal 52 are assembled, the elastic seal 52 is inserted into the pressure relief seat 51 from the pressure relief port 511, and the traction column 524 is passed through the mounting hole 512, and then the traction column 524 is pulled from the outside of the pressure relief seat 51, and the connection part of the elastic seal 52 is deformed through the guide slope 525, and finally the annular groove 522 is inserted into the mounting hole 512 to complete the installation, which has a simple structure, low cost, is easy to install, and improves production efficiency.

[0041] Specifically, the sealing device 6 includes a heating sealing component 61 and a pressing bag sealing component 62. The heating sealing component 61 is arranged at the front of the seat body 1. The vacuum groove 11 is arranged at the front of the seat body 1 and is located at the rear side of the heating sealing component 61. The pressing bag sealing component 62 is arranged at the front of the cover body 2 and moves relative to and presses with the heating sealing component 61. The pressing bag sealing component 62 is provided with an air bag strip 621. The interior of the air bag strip 621 is hollow. The vacuum device includes an air pump and an air pump 3. The air pump 3 is connected to the vacuum groove 11, and the air pump is connected to the airbag strip 621 through an air pipe assembly. The side wall of the pressure relief seat 51 is provided with two air pipe connecting columns 514, and the two air pipe connecting columns 514 are respectively provided with air holes 515 connected to the inner cavity of the pressure relief seat 51. The air pipe assembly includes two connecting air pipes 4, one end of the two connecting air pipes 4 is respectively connected to the two air pipe connecting columns 514, and the other end of the two connecting air pipes 4 is respectively connected to the airbag strip 621 and the air outlet interface of the inflation pump 3. The conventional vacuum sealer presses the heat-generating sealing component 61 with a rubber strip to completely press the vacuum packaging bag against the heat-generating sealing component 61 for heat sealing. However, whether in vacuuming or sealing, the rubber strip is always pressed against the heat-generating sealing component 61 throughout the whole process, which results in the rubber strip still being pressed against the heat-generating sealing component 61 during vacuuming, and the heat-generating sealing component 61 is difficult to obtain good heat dissipation. During long-term continuous vacuuming and sealing, the high-temperature protection is easily triggered, and the next step of operation needs to be performed after the heat-generating sealing component 61 cools down, which is inefficient. The utility model has a low rate and a high failure rate. During sealing, the air bag strip 621 is inflated by the air pump 3 so that the vacuum packaging bag is pressed against the heating sealing component 61. When vacuuming and not sealing, the air bag strip 621 is deflated and pressure-relieved by the pressure relief device 5, so that the air bag strip 621 shrinks and separates from the heating sealing component 61, reducing the contact time with the heating sealing component 61 and improving the heat dissipation efficiency of the heating sealing component 61, thereby enabling the vacuum sealing machine to operate continuously and improving the efficiency of vacuuming and sealing.

[0042] Specifically, a locking mechanism is provided on the left and right sides of the seat 1, respectively. The locking mechanism includes a locking slider 71 and a reset spring. The reset spring is provided on the inner side of the locking slider 71. A lower lock buckle 73 is provided on the upper part of the locking slider 71. An upper lock buckle 72 is provided on the left and right sides of the lower part of the corresponding cover 2. The two lower lock buckles 73 and the two upper lock buckles 72 are snap-fitted respectively. The lower part of the airbag pressure strip 621 is provided with an avoidance groove 622 with an opening facing downward for avoiding the heating sealing component 61. The seat 1 and the cover 2 are locked by the locking force of the upper lock buckle 72 and the lower lock buckle 73, thereby further improving the pressure relief locking force of the pressure relief device 5, and improving reliability and stability. The heating strip on the heating sealing component 61 is avoided by the avoidance groove 622, thereby increasing the contact area between the heating strip and the vacuum packaging bag, increasing the heat sealing area, and improving the sealing effect.

[0043] Specifically, the seat body 1 is further provided with a control circuit, which is electrically connected to the air pump and the air pump 3 respectively, and the seat body 1 is provided with an air-inflating switch 63, which is electrically connected to the control circuit. The lower part of the cover body 2 is provided with an air-inflating trigger block 22 protruding downward, and the upper part of the corresponding seat body 1 is provided with a triggering hole 12. When the cover body 2 and the seat body 1 are pressed against each other, the elastic sealing member 52 seals the pressure relief port 511, and the air-inflating trigger block 22 passes through the triggering hole 12 to trigger the air-inflating switch 63. When the cover is closed, the air-inflating switch 63 is triggered by the air-inflating trigger block 22, thereby playing a safety protection role, preventing the air pump 3 from being started before the cover is closed, causing energy waste, improving safety, reducing energy consumption, and preventing accidental triggering.

[0044] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A vacuum sealing machine for improving the pressure relief locking force, comprising a base (1), a cover (2), a sealing device (6) and a vacuum device, wherein the cover (2) is rotatably mounted on the upper part of the base (1), the vacuum device is arranged inside the base (1), the sealing device (6) is arranged at the front part of the base (1) and / or the cover (2), a vacuum groove (11) is arranged on the rear side of the sealing device (6), and the vacuum device is connected to the sealing device (6) and / or the vacuum groove (11) through an air pipe assembly, characterized in that: A pressure relief device (5) is provided on the air pipe assembly. The pressure relief device (5) comprises a pressure relief seat (51) and an elastic sealing member (52). The pressure relief seat (51) is provided on the air pipe assembly. A pressure relief port (511) is provided on one side of the pressure relief seat (51). The elastic sealing member (52) passes through the pressure relief port (511) and is inserted into the pressure relief seat (51). A sealing plug (521) is provided at the outer end of the elastic sealing member (52). The sealing plug (521) protrudes from the pressure relief port (511). The outer diameter of the sealing plug (521) is larger than the inner diameter of the pressure relief port (511). The sealing plug (521) is abutted against the seat body (1) or the cover body (2). When the cover is opened, the elastic sealing member (52) is separated from the pressure relief seat (51) or a pressure relief gap (53) is provided between the elastic sealing member (52) and the pressure relief seat (51).

2. A vacuum sealer with improved pressure relief locking force according to claim 1, characterized in that: The lower part of the cover body (2) is provided with a mounting groove (21) with an opening facing downward, the pressure relief seat (51) is fixedly installed in the mounting groove (21), the pressure relief port (511) is provided at the lower part of the pressure relief seat (51), the sealing plug (521) is provided at the lower part of the elastic sealing member (52), the upper part of the elastic sealing member (52) is provided with a connecting portion, the connecting portion passes through the pressure relief port (511) and is fixedly connected or slidably connected to the upper part of the pressure relief seat (51), the pressure relief portion is abutted against the upper part of the seat body (1), and when the cover is opened, there is a pressure relief gap (53) between the elastic sealing member (52) and the pressure relief seat (51).

3. A vacuum sealer with improved pressure relief locking force according to claim 2, characterized in that: An annular groove (522) is formed on the outer wall of the connecting portion along the circumferential direction, a mounting hole (512) penetrating the pressure relief seat (51) is formed on the upper portion of the pressure relief seat (51), the connecting portion is inserted into the mounting hole (512), and the inner wall of the annular groove (522) is limitedly matched with the mounting hole (512).

4. A vacuum sealer with improved pressure relief locking force according to claim 3, characterized in that: The length of the annular groove (522) is greater than the length of the mounting hole (512), and the connecting portion and the annular groove (522) are slidably matched up and down.

5. The vacuum sealing machine with improved pressure relief locking force according to claim 3, characterized in that: The inner diameter of the upper part of the pressure relief port (511) is smaller than the inner diameter of the lower part of the pressure relief port (511), forming a conical pressure relief port (511); the upper part of the sealing plug (521) is provided with a conical sealing portion (5211) corresponding to the pressure relief port (511); the lower part of the sealing plug (521) is provided with a circular sealing portion (5212); the outer wall of the conical sealing portion (5211) is abutted against the inner wall of the pressure relief port (511); and the circular sealing portion (5212) is abutted against the lower end surface of the pressure relief seat (51).

6. A vacuum sealer with improved pressure relief locking force according to claim 5, characterized in that: A guide sliding hole (513) is provided below the mounting hole (512), and the diameter of the guide sliding hole (513) is larger than the diameter of the mounting hole (512). The upper part of the elastic sealing member (52) is slidably mounted in the guide sliding hole (513). The outer side wall of the upper part of the elastic sealing member (52) is provided with a plurality of annular upper sealing rings (523) at intervals in the vertical direction. The outer side surface of the conical sealing portion (5211) is provided with a plurality of annular lower sealing rings (5213) at intervals in the vertical direction. Each upper sealing ring (523) is respectively abutted against the inner wall of the guide sliding hole (513), and each lower sealing ring (5213) is respectively abutted against the inner wall of the pressure relief port (511).

7. The vacuum sealing machine with improved pressure relief locking force according to claim 3, characterized in that: A traction column (524) extends upward from the upper end of the connecting portion, and a guiding inclined surface (525) inclined outward from top to bottom is provided between the traction column (524) and the connecting portion.

8. A vacuum sealer with improved pressure relief locking force according to any one of claims 2 to 7, characterized in that: The sealing device (6) comprises a heat-generating sealing component (61) and a bag-pressing sealing component (62); the heat-generating sealing component (61) is arranged at the front of the base (1); the vacuum groove (11) is arranged at the front of the base (1) and is located at the rear side of the heat-generating sealing component (61); the bag-pressing sealing component (62) is arranged at the front of the cover (2) and moves relative to and presses with the heat-generating sealing component (61); The bag pressing and sealing assembly (62) is provided with an air bag strip (621), the interior of the air bag strip (621) is hollow, the vacuum device comprises an air pump and an air pump (3), the air pump (3) is connected to the vacuum groove (11), the air pump and the air bag strip (621) are connected via the air pipe assembly, the side wall of the pressure relief seat (51) is provided with two air pipe connecting columns (514), the two air pipe connecting columns (514) are respectively provided with air holes (515) connected to the inner cavity of the pressure relief seat (51), the air pipe assembly comprises two connecting air pipes (4), one end of the two connecting air pipes (4) is respectively connected to the two air pipe connecting columns (514), and the other end of the two connecting air pipes (4) is respectively connected to the air bag strip (621) and the air outlet interface of the air pump (3).

9. The vacuum sealing machine with improved pressure relief locking force according to claim 8, characterized in that: A locking mechanism is respectively provided on the left and right sides of the seat body (1), and the locking mechanism includes a locking slider (71) and a return spring, the return spring is arranged on the inner side of the locking slider (71), a lower locking buckle (73) is arranged on the upper part of the locking slider (71), and upper locking buckles (72) are respectively provided on the left and right sides of the lower part of the corresponding cover body (2), the two lower locking buckles (73) and the two upper locking buckles (72) are respectively snap-fitted, and an avoidance groove (622) with an opening facing downward for avoiding the heating sealing component (61) is provided at the lower part of the airbag pressure strip (621).

10. The vacuum sealing machine with improved pressure relief locking force according to claim 9, characterized in that: A control circuit is also provided inside the seat body (1), and the control circuit is electrically connected to the vacuum pump and the inflation pump (3) respectively. An inflation switch (63) is provided inside the seat body (1), and the inflation switch (63) is electrically connected to the control circuit. A downwardly protruding inflation trigger block (22) is provided at the lower part of the cover body (2), and a trigger through hole (12) is provided at the upper part of the corresponding seat body (1). When the cover body (2) and the seat body (1) are pressed against each other, the elastic sealing member (52) seals the pressure relief port (511), and the inflation trigger block (22) passes through the trigger through hole (12) to trigger and cooperate with the inflation switch (63).

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