Temperature-controllable curing furnace for packaging bag processing

Abstract

The utility model discloses a kind of curing furnace for packaging bag processing with temperature control, including furnace body, the side hinged cover plate of furnace body, the upper surface of furnace body is fixedly connected with exhaust pipe and air suction pipe, first electric valve is installed on the exhaust pipe and air suction pipe, the inner chamber of exhaust pipe and air suction pipe is installed with fan. The utility model, by setting high-pressure gas cylinder, gas hose, replacement pipe, second electric valve and oxygen detection sensor etc., force the oxygen in furnace to rise and be discharged from the fan inside exhaust pipe, while oxygen detection sensor detects the oxygen content of exhaust pipe discharge gas, when oxygen content reaches threshold value, signal is transmitted to PLC controller, first electric valve and second electric valve on exhaust pipe are closed by PLC controller control, then material is heated and cured, avoid the oxygen of furnace body to cause the oxidation or combustion of material when curing, to improve curing effect.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag processing technology, and in particular to a curing furnace for packaging bag processing with temperature control. Background Technology

[0002] Packaging bags are bags used to package various goods, facilitating transportation and storage during production and distribution. They are widely used in daily life and industrial production. A crucial step in processing packaging bags is curing, which must be completed in a curing furnace. However, most existing curing furnaces of this type cannot quickly dissipate heat after operation, resulting in a long waiting time before packaging bags can be removed after the furnace is opened. This prolonged waiting can also lead to a deterioration in the quality of the cured packaging bags. To address this, patent announcement number CN210758708U discloses "A Curing Furnace for Temperature-Controlled Packaging Bag Processing." This solution utilizes an intake pipe, an exhaust pipe, and two sets of fans operating simultaneously. Cold air is introduced into the furnace through the intake pipe, while hot air is expelled through the exhaust pipe, allowing for rapid heat dissipation. This enables personnel to remove the trays more quickly, preventing packaging bags from becoming hot. The bags, which remain inside the furnace for extended periods, suffer from quality deterioration, thus saving waiting time. By incorporating a base plate, positioning plate, slider, and support rod, the movable pull rod moves the tray, while the slider slides stably between the base plate and positioning plate, allowing the tray to be easily fed into or removed from the furnace, making bag transport more convenient. Furthermore, the installation of a first heating element, a second heating element, and two power interfaces allows for adjustment of the heating elements' operation according to the curing process. The heating elements can be gradually shut off as curing nears completion, utilizing residual heat within the furnace to finish the final curing process, effectively saving energy.

[0003] However, in this scheme, a large amount of oxygen is present in the furnace during the curing process, which can easily lead to the oxidation or combustion of materials and affect the curing effect. Therefore, a curing furnace for packaging bag processing with temperature control is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a temperature-controlled curing oven for processing packaging bags.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a temperature-controlled curing furnace for processing packaging bags, comprising a furnace body, a cover plate hinged to one side of the furnace body, an exhaust pipe and an intake pipe fixedly connected to the upper surface of the furnace body, a first electric valve installed on both the exhaust pipe and the intake pipe, a fan installed in the inner cavity of both the exhaust pipe and the intake pipe, a PLC controller fixedly installed on one side of the furnace body, the PLC controller being electrically connected to two first electric valves and two fans, and a replacement structure and a clamping structure provided on the furnace body;

[0006] The replacement structure includes a replacement pipe fixedly connected to one side of the furnace body. A second electric valve is installed on the replacement pipe. The second electric valve is electrically connected to a PLC controller, and the PLC controller controls the opening and closing of the second electric valve.

[0007] As a further description of the above technical solution:

[0008] A high-pressure gas cylinder is provided on the side of the furnace body. The high-pressure gas cylinder contains compressed carbon dioxide gas. A gas delivery hose is fixedly installed at the outlet of the high-pressure gas cylinder. The other end of the gas delivery hose is fixedly connected to one end of the replacement pipe. The carbon dioxide gas inside the high-pressure gas cylinder is delivered into the gas delivery hose, then into the replacement pipe, and finally enters the furnace body from the lower side inside the furnace body.

[0009] As a further description of the above technical solution:

[0010] An oxygen detection sensor is fixedly installed on the inner top of the furnace body. The oxygen detection sensor is located below the exhaust pipe and is electrically connected to the PLC controller. The oxygen detection sensor detects the oxygen content of the gas discharged from the exhaust pipe. When the oxygen content reaches a threshold, it transmits a signal to the PLC controller, which then controls the first and second electric valves on the exhaust pipe to close.

[0011] As a further description of the above technical solution:

[0012] The clamping structure includes a fixed column fixedly connected to one side of the furnace body. A movable groove is opened on one side of the fixed column, and a bidirectional threaded rod is rotatably connected in the movable groove. A servo motor is fixedly connected to one side of the fixed column. The output shaft of the servo motor is fixedly connected to one end of the bidirectional threaded rod. The servo motor is electrically connected to a PLC controller. The PLC controller controls the servo motor to start, and the servo motor drives the bidirectional threaded rod to rotate.

[0013] As a further description of the above technical solution:

[0014] Each of the opposite threaded sections of the bidirectional threaded rod is threaded with a movable column. Each movable column is slidably connected in a movable groove. An arc-shaped clamp is fixedly connected to one side of each of the two movable columns. The opposite threaded sections of the bidirectional threaded rod drive the two movable columns to slide in the movable groove and move closer to each other. The movable columns drive the corresponding arc-shaped clamps to move, and the high-pressure gas cylinder is clamped and fixed by the two arc-shaped clamps.

[0015] As a further description of the above technical solution:

[0016] The interior of the furnace body is fixedly connected to guide rails on opposite sides. A tray is slidably connected to the interior of the two guide rails. A pull rod is fixedly connected to one side of the tray. The material is placed in the tray and slid into the furnace body through the guide rails for easy cooking.

[0017] As a further description of the above technical solution:

[0018] A display screen is fixedly connected to one side of the furnace body, and temperature sensors are fixedly installed on opposite sides of the interior. The display screen and the two temperature sensors are electrically connected to the PLC controller. A support block is fixedly connected to the top of the furnace body, and a mounting plate is fixedly connected to the bottom of the support block. Multiple sets of first heating tubes and multiple sets of second heating tubes are alternately fixedly connected to the bottom of the mounting plate. Two sets of power interfaces are fixedly installed on one side of the furnace body. Each set of power interfaces is electrically connected to multiple sets of first heating tubes and multiple sets of second heating tubes. The first and second heating tubes cook the materials, while the temperature sensors detect the temperature, transmit the signal to the PLC controller, and display the temperature on the display screen.

[0019] This utility model has the following beneficial effects:

[0020] 1. Compared with existing technologies, this temperature-controlled curing furnace for packaging bag processing, by setting up a high-pressure gas cylinder, gas delivery hose, replacement pipe, second electric valve, and oxygen detection sensor, allows carbon dioxide gas from the high-pressure gas cylinder to be delivered into the gas delivery hose, then into the replacement pipe, and finally into the furnace body from the lower side. Because carbon dioxide is denser than oxygen, the injected carbon dioxide will settle at the bottom of the furnace, forcing the oxygen in the furnace to rise and be discharged from the exhaust pipe by a fan. At the same time, the oxygen detection sensor detects the oxygen content of the gas discharged from the exhaust pipe. When the oxygen content reaches a threshold, a signal is transmitted to the PLC controller, which controls the first and second electric valves on the exhaust pipe to close, and then heats and cures the material. This avoids the oxygen in the furnace body causing the material to oxidize or burn during curing, thereby improving the curing effect.

[0021] 2. Compared with existing technologies, this temperature-controlled curing furnace for packaging bag processing, by setting up fixed columns, bidirectional threaded rods, servo motors, moving columns, and arc-shaped clamps, places the high-pressure gas cylinder between two arc-shaped clamps. Then, the PLC controller controls the servo motor to start, and the servo motor drives the bidirectional threaded rod to rotate. The opposite threaded sections of the bidirectional threaded rod drive the two moving columns to slide in the moving groove and move closer together. The moving columns drive the corresponding arc-shaped clamps to move, and the two arc-shaped clamps clamp and fix the high-pressure gas cylinder, preventing the high-pressure gas cylinder from being damaged due to accidental collision and tipping, thus improving the stability of the high-pressure gas cylinder. Attached Figure Description

[0022] Figure 1 This is a first-view perspective three-dimensional structural diagram of a temperature-controlled curing furnace for processing packaging bags proposed in this utility model.

[0023] Figure 2 This is a second-view perspective three-dimensional structural diagram of a temperature-controlled curing furnace for processing packaging bags proposed in this utility model.

[0024] Figure 3 This is a plan view of a temperature-controlled curing furnace for processing packaging bags according to the present invention.

[0025] Figure 4 This is a cross-sectional view of a temperature-controlled curing furnace for processing packaging bags according to the present invention.

[0026] Figure 5 This is an exploded view of the clamping structure of a temperature-controlled curing furnace for processing packaging bags, as proposed in this utility model.

[0027] Legend:

[0028] 1. Furnace body; 2. Cover plate; 3. Exhaust pipe; 4. Suction pipe; 5. First electric valve; 6. PLC controller; 7. Display screen; 8. Replacement structure; 801. High-pressure gas cylinder; 802. Gas delivery hose; 803. Replacement pipe; 804. Second electric valve; 805. Oxygen detection sensor; 9. Clamping structure; 901. Fixed column; 902. Bidirectional threaded rod; 903. Servo motor; 904. Moving column; 905. Arc-shaped clamp; 10. Power interface; 11. Temperature sensor; 12. Support block; 13. Mounting plate; 14. First heating element; 15. Second heating element; 16. Guide rail; 17. Storage tray; 18. Pull rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figures 1 to 5This utility model provides a temperature-controlled curing furnace for processing packaging bags: It includes a furnace body 1, a cover plate 2 hinged to one side of the furnace body 1, an exhaust pipe 3 and an intake pipe 4 fixedly connected to the upper surface of the furnace body 1, a first electric valve 5 installed on both the exhaust pipe 3 and the intake pipe 4, and a fan installed inside the exhaust pipe 3 and the intake pipe 4. A PLC controller 6 is fixedly installed on one side of the furnace body 1, and the PLC controller 6 is electrically connected to the two first electric valves 5 and the two fans. The furnace body 1 is provided with a replacement structure 8 and a clamping structure 9. A display screen 7 is fixedly connected to the outer side of the furnace body 1, and temperature sensors 11 are fixedly installed on opposite sides inside. The display screen 7 and the two temperature sensors 11 are electrically connected to the PLC controller 6. A support block 12 is fixedly connected to the inner top of the furnace body 1, and the bottom of the support block 12 is fixedly connected to... The furnace body 1 is equipped with a mounting plate 13. Multiple sets of first heating tubes 14 and multiple sets of second heating tubes 15 are alternately fixedly connected to the bottom of the mounting plate 13. Two sets of power interfaces 10 are fixedly installed on the outer side of the furnace body 1. Each set of power interfaces 10 is electrically connected to multiple sets of first heating tubes 14 and multiple sets of second heating tubes 15 respectively. The first heating tubes 14 and the second heating tubes 15 cook the materials. At the same time, the temperature sensor 11 detects the temperature and transmits the signal to the PLC controller 6. The temperature is displayed on the display screen 7. Guide rails 16 are fixedly connected to opposite sides inside the furnace body 1. A tray 17 is slidably connected inside the two guide rails 16. A pull rod 18 is fixedly connected to one side of the tray 17. The materials are placed in the tray 17 and the tray 17 is slid into the furnace body 1 through the guide rails 16 for easy cooking.

[0031] To reduce the oxygen content, the displacement structure 8 includes a displacement pipe 803 fixedly connected to one side of the furnace body 1. A second electric valve 804 is installed on the displacement pipe 803 and is electrically connected to the PLC controller 6. A high-pressure gas cylinder 801 is located on the side of the furnace body 1. The high-pressure gas cylinder 801 contains compressed carbon dioxide gas. A gas delivery hose 802 is fixedly installed at the outlet of the high-pressure gas cylinder 801. The other end of the gas delivery hose 802 is fixedly connected to one end of the displacement pipe 803. An oxygen detection sensor 805 is fixedly installed at the top inside the furnace body 1. The oxygen detection sensor 805 is located below the exhaust pipe 3 and is electrically connected to the PLC controller 6. The high-pressure gas cylinder 801 contains… Carbon dioxide gas is delivered into the gas delivery hose 802, then into the replacement pipe 803, and then enters the furnace body 1 from the lower side. Because carbon dioxide is denser than oxygen, the injected carbon dioxide will settle at the bottom of the furnace, forcing the oxygen in the furnace to rise and be discharged from the blower inside the exhaust pipe 3. At the same time, the oxygen detection sensor 805 detects the oxygen content of the gas discharged from the exhaust pipe 3. When the oxygen content reaches the threshold, the signal is transmitted to the PLC controller 6. The PLC controller 6 controls the first electric valve 5 and the second electric valve 804 on the exhaust pipe 3 to close, and then heats and cures the material to avoid the oxygen in the furnace body 1 causing the material to oxidize or burn during curing, thereby improving the curing effect.

[0032] To achieve the clamping purpose, the clamping structure 9 includes a fixed column 901 fixedly connected to one side of the furnace body 1. A movable groove is provided on one side of the fixed column 901, and a bidirectional threaded rod 902 is rotatably connected within the movable groove. A servo motor 903 is fixedly connected to one side of the fixed column 901. The output shaft of the servo motor 903 is fixedly connected to one end of the bidirectional threaded rod 902. The servo motor 903 is electrically connected to the PLC controller 6. Movable columns 904 are threadedly connected to the opposite threaded sections of the bidirectional threaded rod 902. Each movable column 904 is slidably connected within the movable groove. Two movable columns 904 are positioned opposite each other... Each side is fixedly connected with an arc-shaped clamping plate 905. The high-pressure gas cylinder 801 is placed between the two arc-shaped clamping plates 905. Then, the PLC controller 6 controls the servo motor 903 to start. The servo motor 903 drives the bidirectional threaded rod 902 to rotate. The opposite threaded sections of the bidirectional threaded rod 902 drive the two moving columns 904 to slide in the moving groove and move closer to each other. The moving columns 904 drive the corresponding arc-shaped clamping plates 905 to move. The high-pressure gas cylinder 801 is clamped and fixed by the two arc-shaped clamping plates 905 to prevent the high-pressure gas cylinder 801 from being damaged due to accidental collision and tipping, thereby improving the stability of the high-pressure gas cylinder 801.

[0033] Working principle: The high-pressure gas cylinder 801 is placed between two arc-shaped clamping plates 905. Then, the PLC controller 6 controls the servo motor 903 to start. The servo motor 903 drives the bidirectional threaded rod 902 to rotate. The opposite threaded sections of the bidirectional threaded rod 902 drive two moving columns 904 to slide in the moving groove and move closer together. The moving columns 904 drive the corresponding arc-shaped clamping plates 905 to move. The two arc-shaped clamping plates 905 clamp and fix the high-pressure gas cylinder 801 to prevent it from being damaged due to accidental collision and tipping, thus improving the stability of the high-pressure gas cylinder 801. The material is placed in the placement tray 17 and slid into the furnace body 1 through the guide rail 16. Then, the cover plate 2 is closed. Then, the PLC controller 6 controls the first electric valve 5 and the second electric valve 5 on the exhaust pipe 3. When valve 804 is opened, carbon dioxide gas from high-pressure cylinder 801 is delivered into gas delivery hose 802, then into replacement pipe 803, and finally enters furnace 1 from the lower side. Because carbon dioxide is denser than oxygen, the injected carbon dioxide settles at the bottom of the furnace, forcing oxygen in the furnace to rise and be discharged from the blower inside exhaust pipe 3. At the same time, oxygen detection sensor 805 detects the oxygen content of the gas discharged from exhaust pipe 3. When the oxygen content reaches the threshold, the signal is transmitted to PLC controller 6, which controls the first electric valve 5 and the second electric valve 804 on exhaust pipe 3 to close. Then, the material is heated and cured to prevent oxygen in furnace 1 from causing oxidation or combustion of the material during curing, thereby improving the curing effect.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature-controlled curing furnace for processing packaging bags, comprising a furnace body (1), characterized in that: A cover plate (2) is hinged to one side of the furnace body (1). An exhaust pipe (3) and an intake pipe (4) are fixedly connected to the upper surface of the furnace body (1). A first electric valve (5) is installed on both the exhaust pipe (3) and the intake pipe (4). A fan is installed in the inner cavity of both the exhaust pipe (3) and the intake pipe (4). A PLC controller (6) is fixedly installed on one side of the furnace body (1). The PLC controller (6) is electrically connected to two first electric valves (5) and two fans. A replacement structure (8) and a clamping structure (9) are provided on the furnace body (1). The replacement structure (8) includes a replacement pipe (803) fixedly connected to one side of the furnace body (1), and a second electric valve (804) is installed on the replacement pipe (803). The second electric valve (804) is electrically connected to the PLC controller (6).

2. The temperature-controlled curing oven for processing packaging bags according to claim 1, characterized in that: A high-pressure gas cylinder (801) is provided on the side of the furnace body (1). The high-pressure gas cylinder (801) contains compressed carbon dioxide gas. A gas delivery hose (802) is fixedly installed at the outlet of the high-pressure gas cylinder (801). The other end of the gas delivery hose (802) is fixedly connected to one end of the replacement pipe (803).

3. The temperature-controlled curing oven for processing packaging bags according to claim 1, characterized in that: An oxygen detection sensor (805) is fixedly installed on the inner top of the furnace body (1). The oxygen detection sensor (805) is located below the exhaust pipe (3) and is electrically connected to the PLC controller (6).

4. The temperature-controlled curing oven for processing packaging bags according to claim 1, characterized in that: The clamping structure (9) includes a fixed column (901) fixedly connected to one side of the furnace body (1). A movable groove is provided on one side of the fixed column (901). A bidirectional threaded rod (902) is rotatably connected in the movable groove. A servo motor (903) is fixedly connected to one side of the fixed column (901). The output shaft of the servo motor (903) is fixedly connected to one end of the bidirectional threaded rod (902). The servo motor (903) is electrically connected to the PLC controller (6).

5. A temperature-controlled curing oven for processing packaging bags according to claim 4, characterized in that: The bidirectional threaded rod (902) has a movable column (904) threadedly connected to the opposite threaded section. Each movable column (904) is slidably connected in the movable groove. An arc-shaped clamp (905) is fixedly connected to the opposite side of the two movable columns (904).

6. The temperature-controlled curing oven for processing packaging bags according to claim 1, characterized in that: The furnace body (1) has guide rails (16) fixedly connected to opposite sides inside. The two guide rails (16) are slidably connected to a tray (17) inside. A pull rod (18) is fixedly connected to one side of the tray (17).

7. The temperature-controlled curing oven for processing packaging bags according to claim 1, characterized in that: A display screen (7) is fixedly connected to the outer side of the furnace body (1), and temperature sensors (11) are fixedly installed on the opposite inner side. The display screen (7) and the two temperature sensors (11) are electrically connected to the PLC controller (6). A support block (12) is fixedly connected to the inner top of the furnace body (1), and a mounting plate (13) is fixedly connected to the bottom of the support block (12). Multiple sets of first heating tubes (14) and multiple sets of second heating tubes (15) are alternately fixedly connected to the bottom of the mounting plate (13). Two sets of power interfaces (10) are fixedly installed on the outer side of the furnace body (1). Each set of power interfaces (10) is electrically connected to multiple sets of first heating tubes (14) and multiple sets of second heating tubes (15).

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