Automatic fire extinguishing device of screen printing machine

Abstract

The utility model discloses an automatic fire extinguishing device for a screen printing machine, which comprises a UV (ultraviolet) lamp box and a fire extinguishing support arranged close to the UV lamp box, a fire extinguisher is arranged on the fire extinguishing support, a spray pipe outlet of the fire extinguisher faces the UV lamp box, and a starting cylinder for pressing a switch handle of the fire extinguisher to start the fire extinguisher is arranged on the fire extinguishing support. A smoke sensor is arranged in the UV lamp box, and the starting air cylinder and the smoke sensor are both electrically connected with the control system. A paper feeding monitoring sensor is arranged at an inlet of the UV lamp box, a paper discharging monitoring sensor is arranged at an outlet of the UV lamp box, the control system comprises a timer, and the paper feeding monitoring sensor and the paper discharging monitoring sensor are both electrically connected with the timer. The UV lamp box can give an alarm in time when paper in the UV lamp box is clamped in the UV lamp box, and can automatically extinguish fire when fire occurs in the UV lamp box.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing machines, in particular to an automatic fire extinguishing device for screen printing machines. Background Art

[0002] During the operation of a screen printing machine, when paper enters the UV drying stage, the temperature in the drying section is above 560 degrees. After being oiled, the paper is easily deformed when exposed to high temperatures. These deformed papers can easily get stuck inside the air-drying UV light box when passing through it, causing paper to pile up on the belt. Due to the high temperature generated by the UV lamp, the paper will catch fire in about 10 seconds, which can easily lead to fire accidents and pose a serious threat to the safety of production equipment and operators. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic fire extinguishing device for a screen printing machine, which can alarm in time when paper in a UV light box is stuck in the UV light box, and can automatically extinguish the fire when a fire occurs in the UV light box.

[0004] In order to solve the above technical problems, the present invention adopts the following solutions:

[0005] The automatic fire extinguishing device of the screen printing machine includes a UV light box and a fire extinguishing bracket located near the UV light box. The fire extinguishing bracket is provided with a fire extinguisher, the nozzle outlet of the fire extinguisher is facing the UV light box, and the fire extinguishing bracket is provided with a switch handle for pressing the fire extinguisher to activate the starting cylinder of the fire extinguisher. A smoke sensor is provided in the UV light box.

[0006] It also includes a control system, and the starting cylinder and smoke sensor are electrically connected to the control system. The UV light box, fire extinguisher and control system themselves adopt existing technologies and will not be described in detail. The fire extinguishing bracket is set on the side of the UV light box, avoiding the entrance and exit of the UV light box. Its function is that, through the setting of the control system, starting cylinder and smoke sensor, when there is a fire and smoke in the UV light box, the smoke sensor can sense the smoke and transmit the smoke sensing signal to the control system, and the control system transmits the starting signal to the starting cylinder, driving the starting cylinder to press against the switch handle on the fire extinguisher, so that the fire extinguishing agent of the fire extinguisher is sprayed toward the UV light box through the nozzle to extinguish the fire; through the setting of the fire extinguishing bracket, the fire extinguisher can be fixed and the starting cylinder can be fixed near the switch handle of the fire extinguisher.

[0007] Furthermore, a paper feed monitoring sensor is provided at the entrance of the UV light box, and a paper discharge monitoring sensor is provided at the exit of the UV light box.

[0008] The control system includes a timer, to which both the paper feed monitoring sensor and the paper exit monitoring sensor are electrically connected. These sensors utilize existing technology and are not described in detail here. Their function is to calculate the time difference between the paper feed monitoring sensor and the paper exit monitoring sensor detecting the paper, based on the configuration of the sensors and the timer. A significant variation in this time difference indicates that the paper is deforming and jamming within the UV light box, requiring prompt attention.

[0009] Furthermore, the UV light box includes a light box power supply, and the control system is electrically connected to the light box power supply. This connection between the light box power supply and the control system allows, when the time difference between the paper feed monitoring sensor and the paper discharge monitoring sensor detects a significant change in the time between the paper feed and paper discharge, a control signal can be used to shut off the UV light box power supply, thereby stopping the UV light box from heating the paper and preventing the fire from spreading.

[0010] Furthermore, the UV light box includes a box body and a box lid. Connected below the box lid are at least two lifting cylinders that separate the box lid from the box body. The lifting cylinders are electrically connected to a control system. Both the lifting cylinders and the starting cylinder are equipped with solenoid valves. The control system is actually electrically connected to the solenoid valves on the lifting cylinders and the starting cylinders, respectively. The control system is connected to a control power supply, which is independently configured from the light box power supply. Controlling the operation of the cylinders by switching the solenoid valves is conventional technology and will not be described in detail. The function of the lifting cylinders is to separate the box lid from the box body, thereby facilitating the timely disposal of stuck, deformed paper.

[0011] Furthermore, a mesh belt speed encoder is installed at the entrance of the UV light box and is electrically connected to the control system. The mesh belt speed encoder itself utilizes existing technology and is not described in detail here. Its function is to measure the speed of paper entering the UV light box. Combined with the use of paper feed monitoring sensors and paper exit monitoring sensors, it can more accurately calculate the conveying speed of each sheet of paper within the UV light box, facilitating the detection of speed changes for each sheet of paper. Significant changes in paper speed indicate that the paper is deforming and stuck within the UV light box, requiring prompt attention.

[0012] Furthermore, the UV light box is equipped with an alarm speaker electrically connected to the control system. The alarm speaker itself utilizes existing technology and is not described in detail here. Its function is to promptly alert staff when the control system receives a signal indicating abnormal paper transmission (e.g., when the paper feed monitoring sensor and paper exit monitoring sensor detect a significant change in the time difference between the paper feed and paper exit, or when the mesh belt speed encoder detects a significant change in paper speed).

[0013] Furthermore, the fire extinguishing bracket is in the shape of a hollow cubic frame.

[0014] Furthermore, the fire extinguishing bracket is provided with a support plate for supporting the fire extinguisher.

[0015] Furthermore, the fire extinguishing bracket is provided with a protective rod surrounding the fire extinguisher bottle. Its function is to prevent the fire extinguisher bottle from shaking when the starting cylinder presses against the switch handle through the provision of the protective rod.

[0016] Furthermore, the fire extinguishing bracket is provided with a mounting bracket for mounting a driving cylinder.

[0017] The utility model has the beneficial effects:

[0018] 1. Through the setting of the control system, starting cylinder and smoke sensor, when there is fire and smoke in the UV light box, the smoke sensor can sense the smoke and transmit the smoke sensing signal to the control system. The control system transmits the starting signal to the starting cylinder, driving the starting cylinder to press against the switch handle on the fire extinguisher, so that the fire extinguishing agent of the fire extinguisher is sprayed toward the UV light box through the nozzle to extinguish the fire; through the setting of the fire extinguishing bracket, the fire extinguisher can be fixed and the starting cylinder can be fixed near the switch handle of the fire extinguisher;

[0019] 2. Through the settings of the paper feed monitoring sensor, paper output monitoring sensor and timer, the time difference between the paper feed monitoring sensor and the paper output monitoring sensor detecting the paper can be calculated. When this time difference changes greatly, it means that the paper is deformed and stuck in the UV light box, and timely treatment is required;

[0020] 3. By setting the mesh belt speed encoder, the moving speed of the paper entering the UV light box can be measured. Combined with the use of the paper feed monitoring sensor and the paper output monitoring sensor, the conveying speed of each sheet of paper in the UV light box can be calculated more accurately, which is convenient for detecting the speed change of each sheet of paper. When the paper speed changes greatly, it means that the paper is deformed and stuck in the UV light box, which needs to be dealt with in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present utility model.

[0022] Figure numerals: 1. UV light box; 2. Fire extinguishing bracket; 3. Fire extinguisher; 4. Nozzle; 5. Starting cylinder; 6. Smoke sensor; 7. Paper feed monitoring sensor; 8. Paper output monitoring sensor; 9. Box body; 10. Box cover; 11. Lifting cylinder; 12. Mesh belt running speed encoder; 13. Alarm horn; 14. Support plate; 15. Protective rod; 16. Mounting frame. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] Example 1

[0027] The automatic fire extinguishing device of the screen printing machine includes a UV light box 1 and a fire extinguishing bracket 2 arranged near the UV light box 1. The fire extinguishing bracket 2 is provided with a fire extinguisher 3, and the nozzle 4 of the fire extinguisher 3 is oriented toward the UV light box 1. The fire extinguishing bracket 2 is provided with a switch handle for pressing the fire extinguisher 3 to activate the fire extinguisher 3. A smoke sensor 6 is provided in the UV light box 1.

[0028] It also includes a control system, and the starting cylinder 5 and the smoke sensor 6 are electrically connected to the control system. The UV light box 1, the fire extinguisher 3 and the control system themselves adopt existing technologies and will not be described in detail. The fire extinguishing bracket 2 is arranged on the side of the UV light box 1, avoiding the entrance and exit of the UV light box 1. Its function is that, through the setting of the control system, the starting cylinder 5 and the smoke sensor 6, when there is a fire and smoke in the UV light box 1, the smoke sensor 6 can sense the smoke and transmit the smoke sensing signal to the control system, and the control system transmits the starting signal to the starting cylinder 5, driving the starting cylinder 5 to press against the switch handle on the fire extinguisher 3, so that the fire extinguishing agent of the fire extinguisher 3 is sprayed toward the UV light box 1 through the nozzle 4 to extinguish the fire; through the setting of the fire extinguishing bracket 2, the fire extinguisher 3 can be fixed and the starting cylinder 5 can be fixed near the switch handle of the fire extinguisher 3.

[0029] Specifically, such as Figure 1As shown, a paper feed monitoring sensor 7 is provided at the entrance of the UV light box 1, and a paper discharge monitoring sensor 8 is provided at the exit of the UV light box 1.

[0030] The control system includes a timer, to which both the paper feed monitoring sensor 7 and the paper exit monitoring sensor 8 are electrically connected. Both sensors utilize existing technology and are not described in detail here. Their function is to calculate the time difference between the detection of paper by the two sensors, along with the timer. A significant change in this time difference indicates that the paper is deforming and jamming within the UV light box 1, requiring prompt attention.

[0031] Specifically, such as Figure 1 As shown, the UV light box 1 includes a light box power supply, and the control system is electrically connected to the light box power supply. This connection between the light box power supply and the control system allows the UV light box 1 to be powered off via a control signal when the time difference between the paper feed monitoring sensor 7 and the paper discharge monitoring sensor 8 detects a significant change in the paper feed time. This stops the UV light box 1 from heating the paper and prevents the fire from spreading.

[0032] Specifically, such as Figure 1 As shown, the UV light box 1 includes a box body 9 and a box cover 10. At least two lifting cylinders 11 are connected below the box cover 10 to separate the box cover 10 from the box body 9. The lifting cylinders 11 are electrically connected to the control system. Both the lifting cylinders 11 and the starting cylinder 5 are equipped with solenoid valves. The control system is actually electrically connected to the solenoid valves on the lifting cylinders 11 and the starting cylinder 5, respectively. Controlling the operation of the cylinders by switching the solenoid valves is a prior art technique and will not be described in detail. Its function is to separate the box cover 10 from the box body 9 by setting the lifting cylinders 11, thereby facilitating the timely disposal of stuck and deformed paper.

[0033] Specifically, such as Figure 1 As shown, a mesh belt speed encoder 12 is provided at the entrance of the UV light box 1, and the mesh belt speed encoder 12 is electrically connected to the control system. The mesh belt speed encoder 12 itself adopts existing technology and is not described in detail. Its function is to measure the movement speed of the paper entering the UV light box 1 through the provision of the mesh belt speed encoder 12. In combination with the use of the paper feed monitoring sensor 7 and the paper output monitoring sensor 8, it can more accurately calculate the conveying speed of each sheet of paper in the UV light box 1, making it easier to detect the speed change of each sheet of paper. If the paper speed changes significantly, it indicates that the paper is deformed and stuck in the UV light box 1, and timely treatment is required.

[0034] Specifically, such as Figure 1As shown, the UV light box 1 is equipped with an alarm speaker 13, which is electrically connected to the control system. The alarm speaker 13 itself utilizes existing technology and is not described in detail here. Its function is to promptly alert personnel when the control system receives a signal indicating abnormal paper transmission (such as a significant change in the time difference between the paper feed monitoring sensor 7 and the paper discharge monitoring sensor 8, or a significant change in the paper speed detected by the mesh belt speed encoder 12).

[0035] The fire extinguishing bracket 2 is in the shape of a hollow cubic frame.

[0036] Specifically, such as Figure 1 As shown, a support plate 14 for supporting the fire extinguisher 3 is provided on the fire extinguishing bracket 2 .

[0037] Specifically, such as Figure 1 As shown, the fire extinguishing bracket 2 is provided with a protective rod 15 surrounding the body of the fire extinguisher 3. Its function is to prevent the fire extinguisher 3 from shaking when the starting cylinder 5 is pressed against the switch handle through the provision of the protective rod 15.

[0038] The fire extinguishing bracket 2 is provided with a mounting bracket 16 for mounting a driving cylinder.

[0039] The working principle of this embodiment is described as follows: when the temperature inside the UV light box 1 is too high and the paper is stuck inside the UV light box 1, the paper feed monitoring sensor 7, the paper discharge monitoring sensor 8 and the mesh belt running speed encoder 12 calculate that there is a large error in the paper movement speed inside the UV light box 1, and transmit a paper jam signal to the control system, which transmits an alarm signal to the alarm speaker 13 to notify the staff. At the same time, the control system transmits a signal to the lifting cylinder 11, so that the lifting cylinder 11 lifts the box cover 10, making it easier for the staff to deal with the paper jam.

[0040] When the temperature inside the UV light box 1 is too high and the paper inside the UV light box 1 catches fire and smokes, the smoke sensor 6 transmits a smoke signal to the control system, and the control system transmits a fire extinguishing signal to the starting cylinder 5. The starting cylinder 5 presses the handle of the fire extinguisher 3, causing the fire extinguisher 3 to spray the fire extinguishing agent through the nozzle 4 into the UV light box 1 to extinguish the fire.

[0041] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An automatic fire extinguishing device for a screen printing machine, comprising a UV light box (1), characterized in that: The device further comprises a fire extinguishing bracket (2) arranged near the UV light box (1), a fire extinguisher (3) being arranged on the fire extinguishing bracket (2), a nozzle (4) of the fire extinguisher (3) having an outlet facing the UV light box (1), a starting cylinder (5) for pressing a switch handle of the fire extinguisher (3) to start the fire extinguisher (3) being arranged on the fire extinguishing bracket (2), and a smoke sensor (6) being arranged in the UV light box (1). The invention also comprises a control system, and the starting cylinder (5) and the smoke sensor (6) are both electrically connected to the control system.

2. The automatic fire extinguishing device for a screen printing machine according to claim 1, characterized in that: A paper feed monitoring sensor (7) is provided at the entrance of the UV light box (1), and a paper discharge monitoring sensor (8) is provided at the exit of the UV light box (1). The control system comprises a timer, and a paper feed monitoring sensor (7) and a paper discharge monitoring sensor (8) are both electrically connected to the timer.

3. The automatic fire extinguishing device for a screen printing machine according to claim 2, characterized in that: The UV light box (1) includes a light box power supply, a control system electrically connected to the light box power supply, and the UV light box (1) includes a box body (9) and a box cover (10). At least two lifting cylinders (11) are connected below the box cover (10) to separate the box cover (10) from the box body (9), and the lifting cylinders (11) are electrically connected to the control system.

4. The automatic fire extinguishing device for a screen printing machine according to claim 2, characterized in that: A mesh belt running speed encoder (12) is provided at the entrance of the UV light box (1), and the mesh belt running speed encoder (12) is electrically connected to the control system.

5. The automatic fire extinguishing device for a screen printing machine according to claim 3, characterized in that: The UV lamp box (1) is provided with an alarm speaker (13), and the alarm speaker (13) is electrically connected to the control system.

6. The automatic fire extinguishing device for a screen printing machine according to claim 1, characterized in that: The fire extinguishing bracket (2) is in the shape of a hollow cubic frame.

7. The automatic fire extinguishing device for a screen printing machine according to claim 6, characterized in that: The fire extinguishing bracket (2) is provided with a support plate (14) for supporting the fire extinguisher (3).

8. The automatic fire extinguishing device for a screen printing machine according to claim 7, characterized in that: The fire extinguishing bracket (2) is provided with a protection rod (15) surrounding the body of the fire extinguisher (3).

9. The automatic fire extinguishing device for a screen printing machine according to claim 8, characterized in that: The fire extinguishing bracket (2) is provided with a mounting frame (16) for mounting a driving cylinder.

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