A ventilation system for film production

Abstract

The present invention relates to the field of film production, and particularly to a ventilation system for film production. It includes a ventilation hood arranged above the production line, a negative pressure main pipe, a fire extinguishing powder storage tank, and fire extinguishing nozzles; a ventilation hood is arranged at a certain interval above the production line, a negative pressure branch air pipe is arranged above the ventilation hood, and each of the negative pressure branch air pipes is communicated with the negative pressure main pipe, and flammable harmful gases are sucked out and processed through the negative pressure main pipe; a fire extinguishing powder storage tank is arranged on each side of the ventilation hood, and two selectable fire extinguishing nozzles are arranged on both sides of each fire extinguishing powder storage tank on each side, and the spray pipe of the fire extinguishing powder storage tank is detachably communicated with one end of the fire extinguishing nozzle; the fire extinguishing powder storage tank is controlled to open through a temperature control device. In case of a fire, in order to ensure the reliability of the equipment, we reduce the use of electrical equipment and adopt more reliable mechanical linkage equipment to make the processing reaction more timely and reliable.

Description

Technical Field

[0001] The present invention relates to the field of film production, and particularly to a ventilation system for film production. Background Art

[0002] When we install the adhesive coating on the side baffle during production, some harmful and flammable gases will be generated during the process, including toluene, methyl ethyl ketone, and ethyl acetate. The treatment method we adopt is to purify and discharge through RTO combustion. During the production process, if a fire occurs, it is usually discovered by workers during patrol and then extinguished with a handheld fire extinguisher. Such a method has many defects. Firstly, workers cannot discover and respond in a timely manner. Secondly, when the fire is large, the negative pressure pipe for collecting gas will suck in the flames, causing more serious consequences. And if the fan is turned off, the harmful gases cannot be discharged. Therefore, based on these defects, we have designed a ventilation system for film production. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, meet the actual needs, and provide a ventilation system for film production.

[0004] To achieve the purpose of the present invention, the technical solution adopted by the present invention is: a ventilation system for film production, including a ventilation hood 2 arranged above the production line 1, a negative pressure main pipe 3, a fire extinguishing powder storage tank 4, and a fire extinguishing nozzle 5; a ventilation hood 3 is arranged at a certain interval above the production line, a negative pressure branch air pipe 6 is arranged above the ventilation hood 3, and each negative pressure branch air pipe 6 is communicated with the negative pressure main pipe 3 to suck out and process the flammable harmful gases through the negative pressure main pipe 3; a fire extinguishing powder storage tank 4 is arranged on each side of the ventilation hood 2, and two optional fire extinguishing nozzles 5 are arranged on each side of each fire extinguishing powder storage tank 4. The spray pipe 41 of the fire extinguishing powder storage tank 4 can be detachably connected to one end of the fire extinguishing nozzle 5; the fire extinguishing powder storage tank 4 is controlled to open by a temperature control device 7.

[0005] The temperature control device 7 includes an expansion cavity 71, a sealing piston block 72, and an electric contact switch 75. An expansion cavity placement groove with a vertically cross-sectional shape of a superior arc is arranged on one side of the ventilation hood 2. The expansion cavity is inserted into the expansion cavity placement groove from one side of the expansion cavity placement groove and fixed. The expansion cavity is provided with a sealing piston block 72. An opening is arranged on one side of the sealing piston block, and the diameter of the opening is smaller than the diameter of the sealing piston block. A U-shaped connecting rod 73 is arranged on the side of the piston block close to the opening. One end of the U-shaped connecting rod is connected to the sealing piston block, and the other end is connected to a valve block 74. An expansion gas filling port is arranged on the side of the expansion cavity close to the bottom. The electric contact switch of the fire extinguishing powder storage tank is arranged at the end of the movement path of the valve block 74.

[0006] At the air outlet above the ventilation hood, a four-way pipe cavity 21 is provided. The upper part of the four-way pipe cavity 21 is connected to the negative pressure branch air duct, and the lower part is connected to the air outlet of the ventilation hood. A valve block 74 that perfectly matches the pipe wall is arranged in the pipe on the horizontal side. The valve block is vertically provided with a first communication channel 741. The diameter of the first communication channel is the same as that of the negative pressure branch air duct. Under normal conditions, the upper and lower parts of the first communication channel are respectively connected to the negative pressure branch air duct and the air outlet of the ventilation hood.

[0007] On the side of the first communication channel of the valve block away from the U-shaped connecting rod, an L-shaped second communication channel 742 is provided. The upper pipe orifice of the second communication channel is on the same moving straight line as the upper pipe orifice of the first communication channel. At the pipe orifice on one side below the second communication channel, a power pipe 8 is fixedly arranged. One side pipe orifice of the power pipe is always inside the second communication channel and fits with its inner wall. A wind-rotating blade 81 is arranged in the power pipe. At the end of the first rotating shaft 82 on one side of the wind-rotating blade, a first bevel gear 83 is arranged. On both sides of the first bevel gear, second bevel gears 84 are engaged. The second bevel gears are provided with second rotating shafts 85. At the end of the second rotating shaft, a third bevel gear 86 is sleeved. On one side of the third bevel gear, a fourth bevel gear 51 is horizontally arranged. The fourth bevel gear meshes with the third bevel gear. The fourth bevel gear is fixedly sleeved above the rotating sprinkler head.

[0008] The first rotating shaft, the first bevel gear, the second bevel gear and the second rotating shaft are all arranged in a T-shaped protective sheath 87. Bearings are arranged on the outer circles of the sections where the first rotating shaft and the second rotating shaft extend into the T-shaped protective sheath.

[0009] The number of teeth and the diameter of the fourth bevel gear are larger than those of the third bevel gear.

[0010] Above the fire extinguishing sprinkler head 5, a sealed bearing is provided. The spray pipe of the fire extinguishing powder storage tank is inserted into the sealed bearing for fixation.

[0011] The pipe body below the fire extinguishing sprinkler head 5 is set to be bent.

[0012] Below the fourth bevel gear 51, a first gear 52 is provided. On the same side, another fire extinguishing sprinkler head is provided with a second gear 53. The first gear and the second gear are driven by a toothed belt.

[0013] The beneficial effects of the present invention are as follows:

[0014] In case of a fire, the equipment circuit needs to be quickly shut down. Therefore, for the reliability of the equipment, we reduce the use of electrical equipment and adopt more reliable mechanical linkage equipment to make the processing reaction more timely and reliable. When this device senses abnormal temperature, it can quickly close the ventilation channel and then open the fire extinguisher to extinguish the fire. Brief Description of the Drawings

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figures 1-3 are schematic diagrams of different angles of the present invention;

[0017] Figure 4 is a cross-sectional view of the present invention;

[0018] Figure 5 is a schematic diagram of the temperature control device;

[0019] Figure 6 is a cross-sectional view of the temperature control device;

[0020] Figure 7 is a schematic diagram of the inside of the T-shaped sheath Specific embodiments

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] See Figures 1-7 .

[0023] The present invention discloses a ventilation system for film production, including a ventilation hood 2 arranged above the production line 1, a negative pressure main pipe 3, a fire extinguishing powder storage tank 4, and a fire extinguishing nozzle 5; a ventilation hood 3 is arranged at a certain distance above the production line, a negative pressure branch air pipe 6 is arranged above the ventilation hood 3, and each negative pressure branch air pipe 6 is communicated with the negative pressure main pipe 3, and flammable harmful gases are sucked out and processed through the negative pressure main pipe 3; a fire extinguishing powder storage tank 4 is arranged on both sides of the ventilation hood 2, and two optional fire extinguishing nozzles 5 are arranged on both sides of each fire extinguishing powder storage tank on each side, and the spray pipe 41 of the fire extinguishing powder storage tank 4 is detachably communicated with one end of the fire extinguishing nozzle 5; the fire extinguishing powder storage tank 4 is controlled to open through a temperature control device 7.

[0024] The temperature control device 7 includes an expansion chamber 71, a sealing piston block 72 and an electric contact switch 75. An expansion chamber mounting groove with a vertical cross-section of an excellent arc shape is provided on one side of the ventilation hood 2. The expansion chamber is inserted into the expansion chamber mounting groove from one side of the expansion chamber mounting groove and fixed. A sealing piston block 72 is provided in the expansion chamber. An opening is provided on one side of the sealing piston block. The diameter of the opening is smaller than the diameter of the sealing piston block. A U-shaped connecting rod 73 is provided on the side of the opening of the piston block. One end of the U-shaped connecting rod is connected to the sealing piston block and the other end is connected to a valve block 74. An expansion gas charging port is provided on the bottom side of the expansion chamber. The electric contact switch of the fire extinguishing powder storage tank is provided at the end of the movement path of the valve block 74. When the temperature rises or even an open flame occurs, the expanding gas expands after being heated, thereby pushing the piston block to move. The movement limit of the piston block is not the thrust limit of the expanding gas, but the valve block 74 touching the bottom, that is, touching the electric contact switch, thereby ensuring that when the temperature rises abnormally, the valve block can touch the electric contact switch in time to open the fire extinguishing powder storage tank to spray and extinguish the fire at the fire point.

[0025] A four-way tube cavity 21 is provided at the air outlet above the ventilation hood. The four-way tube cavity 21 is connected to the negative pressure branch air duct above and to the air outlet of the ventilation hood below. A valve block 74 that fully matches the pipe wall is provided in the pipe on the horizontal side. The valve block is vertically provided with a first connecting channel 741. The diameter of the first connecting channel is the same as the diameter of the negative pressure branch air duct. Under normal conditions, the first connecting channel connects the negative pressure branch air duct and the air outlet of the ventilation hood above and below. When the expanding gas expands at high temperature and pushes the piston block, it pushes the valve block so that the first connecting channel is staggered, which blocks the ventilation and prevents the burning flame from entering the pipe to cause a more serious fire.

[0026] On the side of the first communication channel of the valve block away from the U-shaped connecting rod, there is an L-shaped second communication channel 742. The upper pipe orifice of the second communication channel and the upper pipe orifice of the first communication channel are on the same moving straight line. At the pipe orifice on one side below the second communication channel, a power pipe 8 is fixedly arranged. The pipe orifice on one side of the power pipe is always inside the second communication channel and fits with its inner wall. Inside the power pipe, there is a wind-rotating blade 81. At the end of the first rotating shaft 82 on one side of the wind-rotating blade, there is a first bevel gear 83. On both sides of the first bevel gear, there are engaged second bevel gears 84. The second bevel gears are provided with second rotating shafts 85. At the end of the second rotating shaft, there is a third bevel gear 86 sleeved. Horizontally arranged on one side of the third bevel gear is a fourth bevel gear 51, which meshes with the third bevel gear. The fourth bevel gear is fixedly sleeved above the rotating sprinkler head. The diameter of the negative pressure branch air duct 6 is about 20 cm. It needs to extract harmful gases in a certain area, so it has strong suction. After being blocked, its wind power is connected to the second communication channel 742. By introducing the power pipe 8 with a diameter of only about 10 cm, its wind power is further enhanced, so that it can easily drive the four fire sprinkler heads 5 to rotate for fire extinguishing. On the outer circle of the power pipe 8 on one side of the valve block 74, there is a positioning outer edge 88. Under normal conditions, the valve block 74 abuts against the positioning outer edge 88 to play a positioning role and also a limiting role.

[0027] The first rotating shaft, the first bevel gear, the second bevel gear and the second rotating shaft are all arranged in a T-shaped protective sheath 87. Bearings are arranged on the outer circles of the sections of the first rotating shaft and the second rotating shaft extending into the T-shaped protective sheath.

[0028] The number of teeth and the diameter of the fourth bevel gear are larger than those of the third bevel gear. The fourth bevel gear and the third bevel gear are both arranged in a protective shell.

[0029] Above the fire sprinkler head 5, a sealed bearing is arranged, and the spray pipe of the fire extinguishing powder storage tank is inserted into the sealed bearing for fixation.

[0030] The next pipe body of the fire sprinkler head 5 is set to be bent.

[0031] Below the fourth bevel gear 51, there is a first gear 52. On the same side, on the other fire sprinkler head, there is a second gear 53. The first gear and the second gear are driven by a toothed belt.

[0032] Specific operation process:

[0033] Under normal conditions, the first communication channel 741 of the valve block is connected to the upper and lower pipelines. At this time, the ventilation hood 2 normally absorbs harmful gases. When a fire breaks out, the temperature of the inhaled gas rises significantly. When it reaches the established temperature at which the expanding gas in the expansion chamber expands rapidly, the expansion chamber expands, thereby driving the valve block to move and the second communication channel 742 to connect to the suction main pipe, driving the fire extinguishing nozzle 5 to rotate, and the valve block pressing against the electric contact switch 75 to open the fire extinguishing powder storage tank for fire extinguishing.

[0034] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or any direct or indirect application in related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A ventilation system for film production, characterized in that: It includes a ventilation hood (2) arranged above the production line (1), a main negative pressure pipe (3), a fire extinguishing powder storage tank (4), and a fire extinguishing nozzle (5); a ventilation hood (3) is arranged at a certain interval above the production line, a negative pressure branch air duct (6) is arranged above the ventilation hood (3), and each negative pressure branch air duct (6) is communicated with the main negative pressure pipe (3), and the flammable harmful gas is sucked out and processed through the main negative pressure pipe (3); a fire extinguishing powder storage tank (4) is arranged on each side of the ventilation hood (2), and two selectable fire extinguishing nozzles (5) are arranged on each side of the fire extinguishing powder storage tank on each side. The spray pipe (41) of the fire extinguishing powder storage tank (4) can be detachably communicated with one end of the fire extinguishing nozzle (5); the fire extinguishing powder storage tank (4) is controlled to open through a temperature control device (7); the temperature control device (7) includes an expansion cavity (71), a sealing piston block (72), and an electric contact switch (75). An expansion cavity placement groove with a vertically section in the shape of a superior arc is arranged on one side of the ventilation hood (2). The expansion cavity is inserted into the expansion cavity placement groove from one side of the expansion cavity placement groove and fixed. A sealing piston block (72) is arranged in the expansion cavity. An opening is arranged on one side of the sealing piston block, and the diameter of the opening is smaller than the diameter of the sealing piston block. A U-shaped connecting rod (73) is arranged on the side of the piston block near the opening. One end of the U-shaped connecting rod is connected to the sealing piston block, and the other end is connected to a valve block (74). An expansion gas filling port is arranged on the side near the bottom of the expansion cavity. The electric contact switch of the fire extinguishing powder storage tank is arranged at the end of the movement path of the valve block (74); a four-way pipe cavity (21) is arranged at the air outlet above the ventilation hood. The upper part of the four-way pipe cavity (21) is communicated with the negative pressure branch air duct, and the lower part is communicated with the air outlet of the ventilation hood. A valve block (74) that completely matches the pipe wall is arranged in the horizontal side pipe. The valve block is vertically provided with a first communication channel (741), and the diameter of the first communication channel is the same as the diameter of the negative pressure branch air duct. Under normal conditions, the upper and lower parts of the first communication channel are respectively communicated with the negative pressure branch air duct and the air outlet of the ventilation hood; a second communication channel (742) in the shape of an L is arranged on the side of the first communication channel of the valve block away from the U-shaped connecting rod. The upper pipe orifice of the second communication channel is on the same movement straight line as the upper pipe orifice of the first communication channel.

2. The ventilation system for film production according to claim 1, wherein: A power pipe (8) is fixedly arranged at the pipe orifice on one side below the second communication channel. One side pipe orifice of the power pipe is always in the second communication channel and fits with the inner wall thereof. A wind-rotating blade (81) is arranged in the power pipe. A first bevel gear (83) is arranged at the end of a first rotating shaft (82) on one side of the wind-rotating blade. Second bevel gears (84) are engaged on both sides of the first bevel gear. A second rotating shaft (85) is arranged on the second bevel gear. A third bevel gear (86) is sleeved at the end of the second rotating shaft. A fourth bevel gear (51) is horizontally arranged on one side of the third bevel gear. The fourth bevel gear is engaged with the third bevel gear. The fourth bevel gear is fixedly sleeved above the rotating nozzle.

3. The ventilation system for film production according to claim 2, wherein: The first rotating shaft, the first bevel gear, the second bevel gear and the second rotating shaft are all arranged in a T-shaped sheath (87), and bearings are arranged on the outer circles of the first rotating shaft and the second rotating shaft extending into the T-shaped sheath section.

4. A film production ventilation system according to claim 2, characterized in that: The number of teeth and the diameter of the fourth bevel gear are larger than those of the third bevel gear.

5. A film production ventilation system according to claim 2, characterized in that: A sealing bearing is arranged above the fire extinguishing nozzle (5), and the injection pipe of the fire extinguishing powder storage tank is inserted into the sealing bearing for fixation.

6. A thin film production ventilation system according to claim 2, characterized in that: The pipe body of the next fire extinguishing nozzle (5) is set to be bent.

7. A film production ventilation system according to claim 2, characterized in that: A first gear (52) is arranged below the fourth bevel gear (51), and a second gear (53) is arranged on the other fire extinguishing nozzle on the same side. The first gear and the second gear are driven by a toothed belt.

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