A packaging bag sealing device

Abstract

The application discloses a packaging bag sealing device and belongs to the field of packaging equipment. The device comprises a rack and a sealing assembly, a constant-current adjustable power supply and an insulating support plate are fixedly installed on the rack, a strip-shaped electric heating sheet is fixed on the insulating support plate, a plurality of conductive connectors are integrally formed on the electric heating sheet, the plurality of conductive connectors are sequentially arranged along the length direction of the electric heating sheet, one end of the electric heating sheet and one conductive connector are respectively electrically connected with the output positive pole and the output negative pole of the constant-current adjustable power supply, and a high-temperature cloth cover is arranged on the electric heating sheet. A pressing strip is slidingly installed on the rack, the pressing strip and the high-temperature cloth can clamp the bag opening of the packaging bag to be sealed. The bag opening of the packaging bag can be arranged between one end of the electric heating sheet and one conductive connector which are electrically connected with the output positive pole and the output negative pole of the constant-current adjustable power supply. The electric heating sheet in the device can realize local power heating, the device is low in power consumption and rapid in heating while ensuring smooth sealing.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to a packaging bag sealing device. Background Technology

[0002] In industries such as food and daily necessities, sealing packaging bags is a key process in product packaging. The sealing effect, adaptability, energy consumption, and ease of operation of sealing devices directly affect product packaging efficiency and quality.

[0003] In applications where packaging bag sizes are variable and sealing is non-continuous, conventional electrothermal sealing devices mostly use an integral heating element structure. This means the heating element is constantly energized and heating up, regardless of the size of the bag opening. This not only wastes a lot of electricity but also prolongs the preheating time of the heating element, reducing sealing efficiency. At the same time, because the heating element has a fixed heating length, it cannot adapt to packaging bags of different widths. When the width of the bag opening is smaller than the length of the heating element, the excess area of ​​the heating element continues to heat up, which can easily cause the sealing edge of the bag to overheat and break, affecting the sealing quality and increasing the limitations of the device's use.

[0004] In view of the problems of high energy consumption, poor adaptability, inconvenient operation, insufficient safety and poor sealing quality in the existing technology, there is an urgent need for a packaging bag sealing device that can solve the above defects, adapt to packaging bags of different sizes, has low energy consumption, is easy to operate and has high safety. Summary of the Invention

[0005] The purpose of this invention is to provide a packaging bag sealing device that solves the problems of high energy consumption, slow heating rate and unstable sealing quality of existing sealing devices.

[0006] To achieve the above objectives, the present invention provides a packaging bag sealing device, comprising: frame; A sealing assembly includes a constant current adjustable power supply, an insulating support plate, a heating element, a high-temperature cloth, and a pressure strip. The constant current adjustable power supply and the insulating support plate are both fixedly mounted on the frame. The heating element is strip-shaped and is tightly fixed to one side of the insulating support plate. Multiple conductive connectors are integrally formed on the heating element, arranged sequentially along its length. One end of the heating element and one of the conductive connectors are electrically connected to the positive and negative output terminals of the constant current adjustable power supply, respectively. The high-temperature cloth covers the heating element, and the high-temperature cloth... The heating element is tightly attached to the side of the surface away from the insulating support plate; the pressure strip is slidably mounted on the frame, the sliding direction of the pressure strip relative to the frame is perpendicular to the surface of the insulating support plate, the length direction of the pressure strip is the same as the length direction of the heating element, and the pressure strip and the heating element are directly opposite each other along the direction perpendicular to the surface of the insulating support plate; the opening of the packaging bag to be sealed can be arranged and clamped between the pressure strip and the high-temperature cloth; the opening of the packaging bag can be arranged between one end of the heating element, which is electrically connected to the positive and negative output terminals of the constant current adjustable power supply, and one of the conductive connectors.

[0007] This device can achieve localized heating of the heating element at the opening of packaging bags of different sizes and specifications, thereby reducing power consumption and increasing the heating speed and sealing efficiency; at the same time, the movable pressure strip can tighten the opening of the packaging bag to ensure that the opening of the packaging bag can be heat-sealed smoothly.

[0008] Preferably, the sealing assembly further includes a first conductive bolt, a first nut, a second conductive bolt, and a second nut. The length direction of the insulating support plate is the same as the length direction of the heating element. Multiple through holes are formed on the surface of the insulating support plate. The conductive connector is plate-shaped, and each conductive connector has a mounting hole. The multiple through holes and mounting holes are aligned. The first conductive bolt passes through the mounting hole and the through hole in sequence and is screwed onto the first nut. One first conductive bolt passes through each through hole. One first conductive bolt is electrically connected to the negative output of the constant current adjustable power supply. Each end of the heating element has a second mounting hole. Two second through holes are formed on the surface of the insulating support plate. The two second mounting holes are aligned with the two second through holes. The second conductive bolt passes through the mounting hole and the through hole in sequence and is screwed onto the second nut. One second conductive bolt passes through each second through hole. One second conductive bolt is electrically connected to the positive output of the constant current adjustable power supply. On the one hand, the heating element can be reliably and tightly fixed to the insulating support plate; on the other hand, the end of the heating element and the conductive connector can be reliably connected to the constant current adjustable power supply.

[0009] Preferably, the sealing assembly further includes multiple switches, all of which are fixedly mounted on the frame. Each of the multiple conductive bolts is connected to one terminal of one of the multiple switches via a wire, and the other terminal of each of the multiple switches is connected to the negative output terminal of the constant current adjustable power supply via a wire. The switches can control the on / off state of the circuit between the conductive connector and the constant current adjustable power supply, thereby facilitating the adjustment of the heating length of the heating element.

[0010] Preferably, the frame is fixed with multiple strip-shaped protrusions, the length direction of which is perpendicular to the length direction of the heating element. These protrusions are arranged equidistantly along the length of the heating element, and each protrusion corresponds to a specific position of one of the switches. The protrusions primarily serve as markers, ensuring that the opening of the packaging bag is positioned between the energized end of the heating element and a conductive connector in a conductive state.

[0011] Preferably, the pressure strip is arranged horizontally along its length and is vertically slidably mounted on the frame. The pressure strip, the high-temperature cloth, the heating element, and the insulating support plate are arranged sequentially along the vertical direction. Moving the pressure strip downwards can press the opening of the packaging bag to be sealed, ensuring that the bag opening can be compressed and heat-sealed.

[0012] Preferably, the sealing assembly further includes a mounting plate, a first screw, an abutment plate, a fastening nut, a guide rod, a second screw, a limiting nut, a spring, and a movable beam; two mounting plates are provided and both are fixed to the frame, the mounting plates are arranged horizontally, each mounting plate has a hole on its surface and a first screw is inserted vertically through it, the upper end of the first screw is fixed to the abutment plate, the fastening nut is screwed onto the first screw, the abutment plate and the fastening nut together clamp the mounting plate; two guide rods are provided and both are arranged vertically, each guide rod is fixed to one of the two abutment plates, and the pressure strip is arranged between the two guide rods; Two screws are provided, each coaxially fixed to the upper end of the two guide rods; two limiting nuts are provided, each screwed onto the two screws; two springs are provided, each fitted onto the two guide rods; the movable beam is horizontally arranged with a limiting hole at each end, and the two guide rods are slidably inserted into the two limiting holes coaxially; the pressure strip is detachably installed on the movable beam, and the length direction of the pressure strip is the same as the length direction of the movable beam; the lower end of the spring abuts against the upper surface of the abutment plate, the upper end of the spring abuts against the lower side wall of the movable beam, and the upper side wall of the movable beam abuts against the limiting nuts. Pressing down the movable beam can move the pressure strip; releasing the movable beam allows the pressure strip to reliably move upward and return to its original position.

[0013] Preferably, the sealing assembly further includes a T-shaped strip. The lower sidewall of the movable beam is provided with a T-shaped groove, the length direction of which is the same as the length direction of the movable beam. A T-shaped strip matching its shape and size is embedded in the T-shaped groove. The upper long sidewall of the pressure strip is integrally formed with the long sidewall of the T-shaped strip. The lower long sidewall of the pressure strip and the upper surface of the high-temperature cloth can both contact the opening of the packaging bag. The pressure strip is easy to disassemble and replace, and can be reliably installed on the movable beam.

[0014] Preferably, the device also includes a disinfection component, which comprises a protective cover and a UV disinfection lamp. The protective cover is detachably fastened to the frame, and the UV disinfection lamp is fixed inside the protective cover. The UV disinfection lamp is electrically connected to an external power source and can be positioned above the pressure strip. The movable beam, the pressure strip, the high-temperature cloth, and the insulating support plate can all be positioned inside the protective cover. On one hand, the protective cover provides fixation and protection for the UV disinfection lamp, preventing it from irradiating the user. On the other hand, when the heating element is not powered on, the UV lamp can disinfect the movable beam, pressure strip, high-temperature cloth, and insulating support plate.

[0015] Preferably, the protective cover has a positioning protrusion fixed on it, and the frame has a positioning hole, into which the positioning protrusion can be inserted. The protective cover can be detachably installed on the frame and will not easily fall off.

[0016] The advantages and positive effects of the packaging bag sealing device described in this invention are: 1. One end of the heating element can be energized by one of the multiple conductive connectors, thereby achieving localized heating of the heating element. Users can select a suitable conductive connector to be energized according to the size and specifications of the packaging bag to be sealed. This design can significantly reduce the power consumption of the device, while improving the heating speed of the heating element and increasing the sealing efficiency.

[0017] 2. The surface of the heating element is covered with a high-temperature cloth, which has an insulating effect to avoid the risk of electric shock when using the device.

[0018] 3. The heating element and conductive connector can be reliably electrically connected to the constant current adjustable power supply.

[0019] 4. A constant current adjustable power supply is adopted. This design can ensure that the heating element heats up constantly and is adjustable, and the heating element will not burn out.

[0020] 5. By designing guide rods and springs, the pressure bar can be moved down by pressing down on the movable beam, and the pressure bar can be elastically and quickly reset after releasing the hand.

[0021] 6. By designing T-slots and T-strips, the pressure strip can be reliably installed on the movable beam, and the pressure strip is easy to disassemble and replace.

[0022] 7. By designing the disinfection component, on the one hand, the protective cover can fix and protect the ultraviolet disinfection lamp, preventing the ultraviolet disinfection lamp from irradiating the user; on the other hand, when the heating element is powered on, some areas of the movable beam, pressure strip, high-temperature cloth, and insulating support plate cannot be heated and disinfected by the heating element. That is, the heat conducted to the above components when the heating element is heated cannot achieve the effect of high-temperature disinfection. When the heating element is not powered on, the ultraviolet disinfection lamp can be powered on to disinfect the movable beam, pressure strip, high-temperature cloth, and insulating support plate. In addition, the ultraviolet disinfection lamp can also generate ozone when powered on, thereby further improving the disinfection and deodorization effect of the disinfection component.

[0023] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is an overall isometric view of the present invention; Figure 2 This is an isometric view of the disinfection component in this invention; Figure 3 For the partial isometric projection of the present invention Figure 1 ; Figure 4 For the partial isometric projection of the present invention Figure 2 ; Figure 5 for Figure 3 Explosion axonometric drawing; Figure 6 For the partial isometric projection of the present invention Figure 3 ; Figure 7 For the partial isometric projection of the present invention Figure 4 ; Figure 8 For the partial isometric projection of the present invention Figure 5 ; Figure 9 For the partial isometric projection of the present invention Figure 6 ; Figure 10 This is an isometric view of the movable beam in this invention; Figure 11 This is an isometric view of the heating element in this invention; Figure 12 This is an isometric view of the insulating support plate in this invention.

[0025] Figure Labels 01 is the frame, 010 is the strip protrusion, 011 is the positioning hole, 02 is the constant current adjustable power supply, 03 is the insulating support plate, 030 is the through hole one, 031 is the through hole two, 04 is the heating element, 040 is the conductive connector, 0400 is the mounting hole one, 041 is the mounting hole two, 05 is the high temperature cloth, 06 is the pressure strip, 07 is the conductive bolt one, 08 is the nut one, 09 is the conductive bolt two, 10 is the nut two, 11 is the switch, 12 is the mounting plate, 13 is the screw one, 14 is the abutment plate, 15 is the fastening nut, 16 is the guide rod, 17 is the screw two, 18 is the limit nut, 19 is the spring, 20 is the movable beam, 200 is the limit hole, 201 is the T-slot, 21 is the T-strip, 22 is the protective cover, 220 is the positioning protrusion, and 23 is the ultraviolet disinfection lamp. Detailed Implementation

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0028] See appendix Figure 1-12 This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. Specifically, the present invention discloses a packaging bag sealing device capable of sealing packaging bags of different sizes and specifications. The device includes: The frame 01 needs to be placed stably on a horizontal surface when the device is in use.

[0029] The sealing assembly includes a constant current adjustable power supply 02, an insulating support plate 03, a heating element 04, a high-temperature cloth 05, and a pressure strip 06. The constant current adjustable power supply 02 is fixedly installed on the frame 01 by bolts. The constant current adjustable power supply 02 ensures that the heating element 04 maintains constant heating, and the heating element 04 will not burn out regardless of its heating length. Multiple columns are fixed on the frame 01, and the insulating support plate 03 is horizontally arranged on the upper end of the multiple columns and fixed to the multiple columns by bolts. The insulating support plate 03 is an alumina ceramic plate.

[0030] The heating element 04 is strip-shaped and is fixedly attached to one side of the insulating support plate 03. Multiple sheet-shaped conductive connectors 040 are integrally formed on the heating element 04. The multiple conductive connectors 040 are arranged equidistantly along the length of the heating element 04. One end of the heating element 04 is electrically connected to the positive output of the constant current adjustable power supply 02, and one of the conductive connectors 040 is electrically connected to the negative output of the constant current adjustable power supply 02. Note that when using this device, ensure that only one conductive connector 040 is electrically connected to the negative output of the constant current adjustable power supply 02.

[0031] A strip of high-temperature cloth 05 is placed over the heating element 04. The high-temperature cloth 05 is in close contact with the side of the heating element 04 away from the insulating support plate 03. The high-temperature cloth 05 is bonded and fixed to the insulating support plate 03 with high-temperature resistant adhesive. The high-temperature cloth 05 is made of Teflon high-temperature cloth, which has insulation properties to prevent the user from directly contacting the heating element 04 during use and to prevent electric shock.

[0032] A flexible pressure strip 06 is slidably mounted on the frame 01. The pressure strip 06 can be a silicone strip. The sliding direction of the pressure strip 06 relative to the frame 01 is perpendicular to the surface of the insulating support plate 03. The length direction of the pressure strip 06 is the same as the length direction of the heating element 04. The pressure strip 06 and the heating element 04 are directly opposite each other along the direction perpendicular to the surface of the insulating support plate 03. Since the pressure strip 06 is slidably mounted on the frame 01, when the pressure strip 06 moves, one side wall of it and the high-temperature cloth 05 can together clamp the opening of the packaging bag to be sealed. The opening of the packaging bag can be arranged between one end of the heating element 04, which is electrically connected to the positive and negative output terminals of the constant current adjustable power supply 02, and a conductive connector 040.

[0033] Since the packaging bags to be sealed have different sizes and specifications, the heating element 04 in this device can achieve localized heating, which ensures reliable sealing of the packaging bags while avoiding heating of the entire heating element 04, reducing power consumption and increasing heating speed.

[0034] More specifically, the sealing assembly also includes conductive bolt 07, nut 08, conductive bolt 09, and nut 10. The insulating support plate 03 is a rectangular plate with its length direction being the same as that of the heating element 04. Multiple through holes 030 are opened on the surface of the insulating support plate 03. Each conductive connector 040 has a mounting hole 0400. The multiple through holes 030 and mounting holes 0400 are respectively aligned. The conductive bolt 07 passes through the mounting hole 0400 and the through hole 030 in sequence and is screwed onto the nut 08. The bolt head of the conductive bolt 07 can press the conductive connector 040 and the two can achieve electrical connection. Each through hole 030 has a conductive bolt 07 inserted into it. One conductive bolt 07 is electrically connected to the negative output of the constant current adjustable power supply 02.

[0035] Each end of the heating element 04 has a mounting hole 2 041. The insulating support plate 03 has two through holes 2 031. The two mounting holes 2 041 are directly opposite the two through holes 2 031. The conductive bolt 2 09 passes through the mounting hole 2 041 and the through hole 2 031 in sequence and is screwed into the nut 2 10. The bolt head of the conductive bolt 2 09 can press the heating element 04 and the two can be electrically connected. Each through hole 2 031 has a conductive bolt 2 09. The conductive bolt 2 09 on the left side is electrically connected to the positive output of the constant current adjustable power supply 02, and the conductive bolt 2 09 on the right side serves to fix the heating element 04.

[0036] More specifically, the sealing assembly also includes multiple switches 11, which are rocker switches. All switches 11 are fixedly mounted on the frame 01 via snap-fit ​​connections. Multiple conductive bolts 07 are each connected to one terminal of each switch 11 via a wire, and the other terminal of each switch 11 is connected to the negative output of the constant current adjustable power supply 02 via a wire. Each switch 11 controls the on / off state of multiple conductive connectors 040. Under normal conditions, all switches 11 are in the off state. The user can open a switch 11 at a suitable position according to the size of the packaging bag opening to ensure that the heating element 04 in that area can successfully seal the packaging bag.

[0037] Multiple strip-shaped protrusions 010 are fixed on the frame 01. The length direction of the strip-shaped protrusions 010 is perpendicular to the length direction of the heating element 04. The multiple strip-shaped protrusions 010 are arranged equidistantly along the length direction of the heating element 04. The multiple strip-shaped protrusions 010 correspond to the positions of multiple switches 11 along the length direction of the strip-shaped protrusions 010. The strip-shaped protrusions 010 mainly serve as marking and positioning. The opening of the packaging bag should be arranged between the energized end of the heating element 04 and the strip-shaped protrusion 010 corresponding to an open switch 11. The energized end of the heating element 04 is the end of the heating element 04 that is electrically connected to the positive output of the constant current adjustable power supply 02.

[0038] The pressure strip 06 is arranged horizontally along its length and is vertically slidably mounted on the frame 01. The pressure strip 06, high-temperature cloth 05, electric heating element 04 and insulating support plate 03 are arranged in sequence. The user can manually move the pressure strip 06 down to perform the sealing operation. This operation method is simple and reliable.

[0039] More specifically, the sealing assembly also includes a mounting plate 12, a screw 13, an abutment plate 14, a fastening nut 15, a guide rod 16, a screw 17, a limit nut 18, a spring 19, and a movable beam 20. There are two mounting plates 12, both of which are fixed on the frame 01. The mounting plates 12 are arranged horizontally. Each mounting plate 12 has a hole on its surface and a screw 13 passes through it vertically. The upper end of the screw 13 is fixed with an abutment plate 14. A fastening nut 15 is screwed onto the screw 13. The abutment plate 14 and the fastening nut 15 together clamp the mounting plate 12.

[0040] Two guide rods 16 are provided, both arranged vertically. Each guide rod 16 is fixed to one of the two abutment plates 14. A pressure strip 06 is arranged between the two guide rods 16. Two screw rods 17 are provided, each coaxially fixed to the upper end of the two guide rods 16. Two limit nuts 18 are provided, each screwed onto one of the two screw rods 17. Two springs 19 are provided, each sleeved on one of the two guide rods 16. The movable beam 20 is arranged horizontally, with a limit hole 200 at each end. The two guide rods 16 are slidably inserted into the two limit holes 200 on the same axis. The pressure strip 06 is detachably installed on the movable beam 20, and the length direction of the pressure strip 06 is the same as the length direction of the movable beam 20.

[0041] The lower end of the spring 19 abuts against the upper surface of the abutment plate 14, and the upper end of the spring 19 abuts against the lower side wall of the movable beam 20. The upper side wall of the movable beam 20 can abut against the limiting nut 18. When the user manually presses down on the movable beam 20, the pressure bar 06 can move down. When the user releases the movable beam 20, due to the elastic force of the spring 19, the movable beam 20 can move up and abut against the limiting nut 18.

[0042] The lower side wall of the movable beam 20 is provided with a T-shaped groove 201. The length direction of the T-shaped groove 201 is the same as the length direction of the movable beam 20. The opening side of the T-shaped groove 201 is arranged downward. A T-shaped strip 21 matching its shape and size is embedded in the T-shaped groove 201. The upper long side wall of the pressure strip 06 is integrally formed with the long side wall of the T-shaped strip 21. The lower long side wall of the pressure strip 06 and the upper surface of the high temperature cloth 05 can both contact the bag opening of the packaging bag.

[0043] More specifically, it also includes a disinfection component, which includes a protective cover 22 and an ultraviolet disinfection lamp 23. The protective cover 22 is detachably fastened to the frame 01, and when the device is used for sealing operations, the protective cover 22 is completely separated from the frame 01. The ultraviolet disinfection lamp 23 is fixed inside the protective cover 22 and is electrically connected to an external power source. The ultraviolet disinfection lamp 23 can be arranged above the pressure strip 06. The movable beam 20, the pressure strip 06, the high-temperature cloth 05, and the insulating support plate 03 can all be arranged inside the protective cover 22. When the heating element 04 is powered on and heats up, some areas of the movable beam 20, pressure strip 06, high-temperature cloth 05, and insulating support plate 03 cannot be heated and disinfected by the heating element 04. When the heating element 04 is not powered on, the ultraviolet disinfection lamp 23 is powered on. The ultraviolet disinfection lamp 23 can disinfect the movable beam 20, pressure strip 06, high-temperature cloth 05, and insulating support plate 03. In addition, the ultraviolet disinfection lamp 23 can also generate ozone when powered on, thereby further improving the disinfection and deodorization effect of the disinfection component.

[0044] The protective cover 22 is fixed with a positioning protrusion 220, and the frame 01 is provided with a positioning hole 011. The positioning protrusion 220 can be inserted into the positioning hole 011, and the protective cover 22 will not fall off the frame 01.

[0045] By designing this disinfection component, the sealing device can be used to seal packaging bags for food, medicine, and other products.

[0046] Initially, all switches 11 are in the off state. The user selects a suitable switch 11 and turns it on according to the size of the bag opening. The switch 11 in the open state will be electrically connected to the energized end of the heating element 04 and generate heat. The user can stretch the opening of the bag to be sealed horizontally and place it between the pressure strip 06 and the high-temperature cloth 05, with the opening of the bag located between the open switch 11 and the energized end of the heating element 04. Then, the user manually presses down the movable beam 20, causing the pressure strip 06 to move down. After the opening of the bag is pressed between the pressure strip 06 and the high-temperature cloth 05 for a period of time, the user releases the movable beam 20 to ensure that the bag is sealed smoothly. The user then removes the sealed bag.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A packaging bag sealing device, characterized in that, include: Rack (01); A sealing assembly, comprising a constant current adjustable power supply (02), an insulating support plate (03), a heating element (04), a high-temperature cloth (05), and a pressure strip (06). The constant current adjustable power supply (02) and the insulating support plate (03) are both fixedly mounted on the frame (01). The heating element (04) is strip-shaped and is tightly fixed to one side of the insulating support plate (03). Multiple conductive connectors (040) are integrally formed on the heating element (04), and the multiple conductive connectors (040) are arranged sequentially along the length of the heating element (04). One end of the heating element (04) and one of the conductive connectors (040) are electrically connected to the positive and negative output terminals of the constant current adjustable power supply (02), respectively. The high-temperature cloth (05) covers the heating element (04). The high-temperature cloth (05) is in close contact with the side surface of the heating element (04) away from the insulating support plate (03); the pressure strip (06) is slidably mounted on the frame (01), the sliding direction of the pressure strip (06) relative to the frame (01) is perpendicular to the plate surface of the insulating support plate (03), the length direction of the pressure strip (06) is the same as the length direction of the heating element (04), and the pressure strip (06) and the heating element (04) are directly opposite each other along the direction perpendicular to the plate surface of the insulating support plate (03); the pressure strip (06) and the high-temperature cloth (05) can be arranged and clamped to seal the bag opening of the packaging bag; the bag opening of the packaging bag can be arranged between one end of the heating element (04) which is electrically connected to the positive and negative output terminals of the constant current adjustable power supply (02) and a conductive connector (040).

2. The packaging bag sealing device according to claim 1, characterized in that, The sealing assembly also includes a first conductive bolt (07), a first nut (08), a second conductive bolt (09), and a second nut (10). The length direction of the insulating support plate (03) is the same as the length direction of the heating element (04). Multiple through holes (030) are provided on the surface of the insulating support plate (03). The conductive connector (040) is plate-shaped, and each conductive connector (040) has a mounting hole (0400). The multiple through holes (030) and the multiple mounting holes (0400) are respectively aligned. The first conductive bolt (07) passes through the mounting hole (0400) and the first through hole (030) in sequence and is screwed onto the first nut (08). Each through hole (030) has a... One of the conductive bolts (07) is electrically connected to the negative output of the constant current adjustable power supply (02); each end of the heating element (04) is provided with a mounting hole (041); two through holes (031) are provided on the surface of the insulating support plate (03); the two mounting holes (041) are respectively aligned with the two through holes (031); the conductive bolt (09) passes through the mounting hole (041) and the through hole (031) in sequence and is screwed to the nut (10); a conductive bolt (09) is passed through each through hole (031); and one of the conductive bolts (09) is electrically connected to the positive output of the constant current adjustable power supply (02).

3. A packaging bag sealing device according to claim 2, characterized in that, The sealing assembly also includes multiple switches (11), which are fixedly installed on the frame (01). Each of the multiple conductive bolts (07) is connected to one terminal of the multiple switches (11) via a wire, and the other terminal of the multiple switches (11) is connected to the negative output terminal of the constant current adjustable power supply (02) via a wire.

4. A packaging bag sealing device according to claim 3, characterized in that, Multiple strip protrusions (010) are fixed on the frame (01). The length direction of the strip protrusions (010) is perpendicular to the length direction of the heating element (04). The multiple strip protrusions (010) are arranged equidistantly along the length direction of the heating element (04). The multiple strip protrusions (010) correspond to the positions of the multiple switches (11) along the length direction of the strip protrusions (010).

5. A packaging bag sealing device according to claim 1, characterized in that, The pressure strip (06) is arranged horizontally along its length and is vertically slidably mounted on the frame (01). The pressure strip (06), the high-temperature cloth (05), the electric heating element (04), and the insulating support plate (03) are arranged in sequence along the vertical direction.

6. A packaging bag sealing device according to claim 5, characterized in that, The sealing assembly also includes a mounting plate (12), a screw (13), an abutment plate (14), a fastening nut (15), a guide rod (16), a screw (17), a limiting nut (18), a spring (19), and a movable beam (20). Two mounting plates (12) are provided and fixed to the frame (01). The mounting plates (12) are horizontally arranged, and each mounting plate (12) has a hole on its surface through which a screw (13) passes vertically. The upper end of the screw (13) is fixed to the abutment plate (14), and the fastening nut (15) is screwed onto the screw (13). The abutment plate (14) and the fastening nut (15) together clamp the mounting plate (12). Two guide rods (16) are provided and vertically arranged. Each guide rod (16) is fixed to one of the two abutment plates (14), and the pressure strip (06) is arranged on the two guide rods. Between the guide rods (16); two screw rods (17) are provided and each is coaxially fixed to the upper end of the two guide rods (16); two limit nuts (18) are provided and each is screwed onto the two screw rods (17); two springs (19) are provided and each is fitted onto the two guide rods (16); the movable beam (20) is arranged horizontally and each of its two ends is provided with a limit hole (200), the two guide rods (16) are coaxially slidably inserted into the two limit holes (200), the pressure strip (06) is detachably installed on the movable beam (20), the length direction of the pressure strip (06) is the same as the length direction of the movable beam (20); the lower end of the spring (19) abuts against the upper plate surface of the abutment plate (14), the upper end of the spring (19) abuts against the lower side wall of the movable beam (20), and the upper side wall of the movable beam (20) can abut against the limit nut (18).

7. A packaging bag sealing device according to claim 6, characterized in that, The sealing assembly also includes a T-shaped strip (21), and the lower side wall of the movable beam (20) is provided with a T-shaped groove (201). The length direction of the T-shaped groove (201) is the same as the length direction of the movable beam (20). The T-shaped groove (201) is embedded with a T-shaped strip (21) that matches its shape and size. The upper long side wall of the pressure strip (06) is integrally formed with the long side wall of the T-shaped strip (21). The lower long side wall of the pressure strip (06) and the upper surface of the high-temperature cloth (05) can both contact the bag opening of the packaging bag.

8. A packaging bag sealing device according to claim 6, characterized in that, It also includes a disinfection component, which includes a protective cover (22) and an ultraviolet disinfection lamp (23). The protective cover (22) is detachably fastened to the frame (01). The ultraviolet disinfection lamp (23) is fixed inside the protective cover (22). The ultraviolet disinfection lamp (23) is electrically connected to an external power source. The ultraviolet disinfection lamp (23) can be arranged above the pressure strip (06). The movable beam (20), the pressure strip (06), the high-temperature cloth (05), and the insulating support plate (03) can all be arranged inside the protective cover (22).

9. A packaging bag sealing device according to claim 8, characterized in that, The protective cover (22) is fixed with a positioning protrusion (220), and the frame (01) is provided with a positioning hole (011). The positioning protrusion (220) can be inserted into the positioning hole (011).

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