Vacuum shaping machine with short circuit protection effect

Abstract

The utility model discloses a vacuum shaping machine with a short-circuit protection effect, which relates to the technical field of product packaging equipment and comprises an operation platform, and the left side of the operation platform is fixedly connected with a circuit box. A short circuit protection mechanism is arranged in an inner cavity of the circuit box and comprises a circuit board, an input wiring terminal, a reset switch, a field effect transistor, an optocoupler relay, an output wiring terminal, a first resistor, a second resistor and a third resistor, and the circuit board is fixedly installed in the inner cavity of the circuit box. The bottom end of the input wiring terminal is fixedly installed on the upper left corner of the top end of the circuit board, and the bottom end of the reset switch is fixedly installed on the rear middle side of the top end of the circuit board. According to the vacuum shaping machine with the short circuit protection effect, the problems that in the actual using process of existing equipment, the short circuit protection function is not achieved or the protection sensitivity is not high enough, and electric leakage and electric shock of users can be caused are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of product packaging equipment, and in particular relates to a vacuum shaping machine with short-circuit protection effect. Background Art

[0002] The shaping vacuum machine can remove oxygen to help the product prevent moisture and oxidation. The mildew and deterioration of the product is mainly caused by the activity of microorganisms in the air, and most microorganisms need oxygen to survive. Vacuum packaging uses this principle to remove the oxygen in the packaging bag and the inner cavity of the built-in product, so that the microorganisms lose their "living environment."

[0003] However, in actual use, existing equipment does not have a short-circuit protection function or the protection sensitivity is not fast enough, which may cause leakage and electric shock to users. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing equipment does not have a short-circuit protection function or the protection sensitivity is not fast enough.

[0005] The utility model solves the technical problem by adopting the following technical scheme: a vacuum shaping machine with short-circuit protection effect, comprising an operating platform, a circuit box is fixedly connected to the left side of the operating platform, a short-circuit protection mechanism is arranged in the inner cavity of the circuit box, the short-circuit protection mechanism comprises a circuit board, an input wiring terminal, a reset switch, a field effect transistor, an optical coupler relay, an output wiring terminal, a first resistor, a second resistor and a third resistor, the circuit board is fixedly installed in the inner cavity of the circuit box, the bottom end of the input wiring terminal is fixedly installed at the upper left corner of the top of the circuit board, the bottom end of the reset switch is fixedly installed at the middle rear side of the top of the circuit board, the bottom ends of the field effect transistor and the optical coupler relay are installed side by side at the front side of the top of the circuit board, the bottom end of the output wiring terminal is fixedly installed at the upper right corner of the top of the circuit board, and the bottom ends of the first resistor, the second resistor and the third resistor are installed side by side at the top of the circuit board, located at the rear side of the field effect transistor and the optical coupler relay.

[0006] As a preferred embodiment of the present invention, the output end of the negative pole of the input terminal is electrically connected to the input end of the first resistor, the output end of the first resistor is electrically connected to the input end of the field effect transistor, the input end of the optocoupler relay is electrically connected to the output end of the field effect transistor, and the input end of the reset switch is electrically connected to the output end of the optocoupler relay.

[0007] As a preferred embodiment of the present invention, the output end of the positive pole of the input terminal is electrically connected to the input end of the third resistor, the output end of the third resistor is electrically connected to the third corner of the optocoupler relay, the output end of the first resistor is electrically connected to the fourth corner of the optocoupler relay, and the output end of the field effect transistor is electrically connected to the input end of the second resistor.

[0008] As a preferred embodiment of the utility model, the second corner of the optocoupler relay is electrically connected to the output end of the second resistor, the first corner of the optocoupler relay is electrically connected to the input end of the output terminal, the two ends of the reset switch are respectively electrically connected to the third corner and the fourth corner of the optocoupler relay, and the second corner of the optocoupler relay is electrically connected to a light-emitting diode.

[0009] As a preferred embodiment of the utility model, the right side of the top end of the operating platform is movably connected with a movable clamping plate and a heating pressing plate, the movable clamping plate is arranged on the rear side of the heating pressing plate, and the top end of the operating platform is movably connected with a sealing cover, the inner cavity of the sealing cover is movably sleeved on the outer sides of the movable clamping plate and the heating pressing plate.

[0010] As a preferred embodiment of the utility model, a vacuum pump is fixedly installed at the upper left corner of the top of the operating platform, the rear end of the vacuum pump is fixedly connected to a gas pipeline, and the other end of the gas pipeline is fixedly connected to the rear end of the sealing cover.

[0011] As a preferred embodiment of the utility model, an inspection cover is fixedly installed on the back of the operating platform by bolts, a supporting upright plate is fixedly connected to the bottom end of the operating platform, and a device base is fixedly connected to the bottom end of the supporting upright plate.

[0012] The beneficial effects of the utility model are:

[0013] 1. This vacuum shaping machine with short-circuit protection effect solves the problem that the existing equipment does not have a short-circuit protection function or the protection sensitivity is not fast enough during actual use, which may cause leakage and electric shock to users through the coordinated use of various components.

[0014] 2. This vacuum shaping machine with short-circuit protection effect can form enclosed air in the inner cavity of the sealing cover when it is closed through the setting of the sealing cover, so as to facilitate the evacuation of the air in the inner cavity of the packaging bag. Through the setting of the inspection cover, the internal components of the operating platform can be inspected and replaced to avoid the impact of component damage on the operation of the device. Through the setting of the supporting vertical plate and the device base, the device can be supported and fixed to avoid shaking of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall front side structure provided by an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall back side structure provided by an embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a sealing cover provided by an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the side view structure of the circuit board provided by the embodiment of the utility model;

[0019] Figure 5 It is a schematic diagram of the circuit board circuit structure provided by an embodiment of the utility model.

[0020] Explanation of the marks in the figure: 1. Operating platform; 2. Circuit box; 3. Short-circuit protection mechanism; 301. Circuit board; 302. Input terminal; 303. Reset switch; 304. Field effect transistor; 305. Optocoupler relay; 306. Output terminal; 307. First resistor; 308. Second resistor; 309. Third resistor; 4. Movable clamping plate; 5. Heating and pressing plate; 6. Sealing cover; 7. Vacuum pump; 8. Gas pipeline; 9. Inspection cover; 10. Support plate; 11. Device base. DETAILED DESCRIPTION

[0021] The present invention will now be further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0022] like Figures 1 to 5 As shown, the utility model provides a vacuum shaping machine with short-circuit protection effect, including an operating platform 1, a circuit box 2 is fixedly connected to the left side of the operating platform 1, a short-circuit protection mechanism 3 is arranged in the inner cavity of the circuit box 2, and the short-circuit protection mechanism 3 includes a circuit board 301, an input terminal 302, a reset switch 303, a field effect transistor 304, an optical coupler relay 305, an output terminal 306, a first resistor 307, a second resistor 308 and a third resistor 309, the circuit board 301 is fixedly installed in the inner cavity of the circuit box 2, the input terminal The bottom end of the sub 302 is fixedly installed at the upper left corner of the top of the circuit board 301, the bottom end of the reset switch 303 is fixedly installed at the middle rear side of the top of the circuit board 301, the bottom ends of the field effect transistor 304 and the optocoupler relay 305 are installed side by side on the front side of the top of the circuit board 301, the bottom end of the output terminal 306 is fixedly installed at the upper right corner of the top of the circuit board 301, and the bottom ends of the first resistor 307, the second resistor 308 and the third resistor 309 are installed side by side at the top of the circuit board 301, located behind the field effect transistor 304 and the optocoupler relay 305.

[0023] refer to Figures 1 to 5 The output end of the negative electrode of the input terminal 302 is electrically connected to the input end of the first resistor 307, the output end of the first resistor 307 is electrically connected to the input end of the field effect transistor 304, the input end of the optocoupler relay 305 is electrically connected to the output end of the field effect transistor 304, the input end of the reset switch 303 is electrically connected to the output end of the optocoupler relay 305, the output end of the positive electrode of the input terminal 302 is electrically connected to the input end of the third resistor 309, the output end of the third resistor 309 is electrically connected to the third horn of the optocoupler relay 305 The output end of the first resistor 307 is electrically connected to the fourth corner of the optocoupler relay 305, the output end of the field effect transistor 304 is electrically connected to the input end of the second resistor 308, the second corner of the optocoupler relay 305 is electrically connected to the output end of the second resistor 308, the first corner of the optocoupler relay 305 is electrically connected to the input end of the output terminal 306, the two ends of the reset switch 303 are respectively electrically connected to the third corner and the fourth corner of the optocoupler relay 305, and the second corner of the optocoupler relay 305 is electrically connected to a light-emitting diode.

[0024] The above scheme is adopted: through the setting of the field effect transistor 304, the on and off of the entire main circuit can be controlled; through the setting of the first resistor 307, the field effect transistor 304 can be prevented from being suspended and misleading the optocoupler relay 305 to be turned on by environmental interference; through the setting of the second resistor 308, the field effect transistor 304 can be current limited to avoid excessive current; through the setting of the optocoupler relay 305, the field effect transistor 304 can be controlled; through the setting of the third resistor 309, the light-emitting diode at the second corner of the optocoupler relay 305 can be current limited.

[0025] refer to Figures 1 to 5 The right side of the top of the operating platform 1 is movably connected with a movable clamping plate 4 and a heating pressing plate 5, and the movable clamping plate 4 is arranged on the rear side of the heating pressing plate 5. The top of the operating platform 1 is movably connected with a sealing cover 6, and the inner cavity of the sealing cover 6 is movably sleeved on the outer sides of the movable clamping plate 4 and the heating pressing plate 5. A vacuum pump 7 is fixedly installed at the upper left corner of the top of the operating platform 1, and the rear end of the vacuum pump 7 is fixedly connected with a gas pipeline 8, and the other end of the gas pipeline 8 is fixedly connected to the rear end of the sealing cover 6. An inspection cover 9 is fixedly installed on the back of the operating platform 1 by bolts, and the bottom end of the operating platform 1 is fixedly connected with a supporting vertical plate 10, and the bottom end of the supporting vertical plate 10 is fixedly connected with a device base 11.

[0026] The above scheme is adopted: through the setting of the sealing cover 6, the inner cavity of the sealing cover 6 can form a confined air when it is closed, which is convenient for evacuating the air in the inner cavity of the packaging bag; through the setting of the inspection cover 9, the internal components of the operating platform 1 can be inspected and replaced to avoid the impact of component damage on the operation of the device; through the setting of the supporting plate 10 and the device base 11, the device can be supported and fixed to avoid shaking of the device during use.

[0027] Working principle:

[0028] When in use, the components of the device are operated and controlled through the PLC control panel. The sealing cover 6 is opened, the opening of the packaging bag is placed under the movable clamping plate 4 and the heating pressing plate 5, the opening of the packaging bag is clamped by controlling the movable clamping plate 4 to move downward, and then the sealing cover 6 is closed, so that the bottom end of the sealing cover 6 contacts the top end of the operating platform 1 to form a closed space, and the air in the inner cavity of the sealing cover 6 is extracted through the air pipeline 8 by controlling the vacuum pump 7 to work, thereby extracting the air in the inner cavity of the packaging bag to form a vacuum in the inner cavity, and then the heating pressing plate 5 is controlled to move downward and heat the bag opening so that the bag opening is bonded and sealed, thereby completing the vacuum processing of the packaging bag, and connecting the input terminal 302 to the input power supply, connecting the output terminal 306 to the electrical components of the device, and pressing the reset switch 303 to turn on the circuit. At this time, the positive electrode of the input power supply will pass through the third resistor 309 for current limiting, and then pass The reset switch 303 sends a signal to the field effect transistor 304 and provides a driving signal to turn on the field effect transistor 304. At this time, the input power will flow to the output terminal 306 for output, and at the same time, the first and second corners of the optocoupler relay 305 will form a loop, so that the light-emitting diode will emit light, and the photosensitive transistors at the third and fourth corners of the optocoupler relay 305 will be turned on, so that the entire circuit will be self-locking, thereby releasing the reset switch 303 and this circuit will work normally. When a short circuit occurs at the output end of the output terminal 306, the voltage of the output terminal 306 will become 0 volts, and the first and second corners of the optocoupler relay 305 will also become 0 volts, causing the photosensitive transistors at the third and fourth corners of the optocoupler relay 305 to be cut off, and the voltage at the gate of the field effect transistor 304 will be quickly discharged to the ground through the first resistor 307 to cut off the field effect transistor 304, thereby cutting off the main loop to achieve the short-circuit protection function.

[0029] In summary: this vacuum shaping machine with short-circuit protection effect, through the coordinated use of various components, solves the problem that the existing equipment does not have a short-circuit protection function or the protection sensitivity is not fast enough during actual use, which may cause leakage and electric shock to users.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device;

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents;

[0032] The above description only describes the specific implementation methods of the utility model. Various examples do not limit the essential content of the utility model. Ordinary technicians in the relevant technical field can modify or deform the specific implementation methods described above after reading the description without departing from the essence and scope of the utility model.

Claims

1. A vacuum shaping machine with short-circuit protection effect, comprising an operating platform (1), characterized in that: A circuit box (2) is fixedly connected to the left side of the operating platform (1); The inner cavity of the circuit box (2) is provided with a short-circuit protection mechanism (3); the short-circuit protection mechanism (3) comprises a circuit board (301), an input wiring terminal (302), a reset switch (303), a field effect transistor (304), an optical coupling relay (305), an output wiring terminal (306), a first resistor (307), a second resistor (308) and a third resistor (309); the circuit board (301) is fixedly mounted in the inner cavity of the circuit box (2); the bottom end of the input wiring terminal (302) is fixedly mounted at the upper left corner of the top of the circuit board (301) The bottom end of the reset switch (303) is fixedly mounted on the middle rear side of the top of the circuit board (301); the bottom ends of the field effect transistor (304) and the photocoupler relay (305) are mounted side by side on the front side of the top of the circuit board (301); the bottom end of the output terminal (306) is fixedly mounted on the upper right corner of the top of the circuit board (301); and the bottom ends of the first resistor (307), the second resistor (308) and the third resistor (309) are mounted side by side on the top of the circuit board (301) and are located behind the field effect transistor (304) and the photocoupler relay (305).

2. A vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: The output end of the negative pole of the input terminal (302) is electrically connected to the input end of the first resistor (307), the output end of the first resistor (307) is electrically connected to the input end of the field effect transistor (304), the input end of the optical coupler relay (305) is electrically connected to the output end of the field effect transistor (304), and the input end of the reset switch (303) is electrically connected to the output end of the optical coupler relay (305).

3. A vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: The output end of the positive pole of the input terminal (302) is electrically connected to the input end of the third resistor (309), the output end of the third resistor (309) is electrically connected to the third corner of the optocoupler relay (305), the output end of the first resistor (307) is electrically connected to the fourth corner of the optocoupler relay (305), and the output end of the field effect transistor (304) is electrically connected to the input end of the second resistor (308).

4. A vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: The second corner of the optical coupler relay (305) is electrically connected to the output end of the second resistor (308), the first corner of the optical coupler relay (305) is electrically connected to the input end of the output terminal (306), the two ends of the reset switch (303) are electrically connected to the third corner and the fourth corner of the optical coupler relay (305), respectively, and the second corner of the optical coupler relay (305) is electrically connected to a light emitting diode.

5. The vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: The right side of the top end of the operating platform (1) is movably connected to a movable clamping plate (4) and a heating pressing plate (5), and the movable clamping plate (4) is arranged on the rear side of the heating pressing plate (5). The top end of the operating platform (1) is movably connected to a sealing cover (6), and the inner cavity of the sealing cover (6) is movably sleeved on the outer sides of the movable clamping plate (4) and the heating pressing plate (5).

6. A vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: A vacuum pump (7) is fixedly installed at the upper left corner of the top of the operating platform (1), the rear end of the vacuum pump (7) is fixedly connected to a gas pipeline (8), and the other end of the gas pipeline (8) is fixedly connected to the rear end of the sealing cover (6).

7. The vacuum shaping machine with short-circuit protection effect according to claim 1, characterized in that: An inspection cover plate (9) is fixedly mounted on the back of the operating platform (1) by means of bolts, a supporting vertical plate (10) is fixedly connected to the bottom end of the operating platform (1), and a device base (11) is fixedly connected to the bottom end of the supporting vertical plate (10).

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