Injection molding waste gas purification treatment device

Abstract

The invention relates to an injection molding waste gas purification treatment device applied to the technical field of injection molding devices.The injection molding waste gas purification treatment device comprises a main air duct and an intelligent signal processor, main fiber cloth replacers are arranged on the two sides of a main air duct shell of the main air duct, each main fiber cloth replacer comprises a main rotary damper and a main motor, and a main loop bar A is connected to the main rotary damper; the output end of the main motor is connected with a main sleeve rod B. A main activated carbon fiber cloth roll is installed on the main sleeve rod B. The end of the main activated carbon fiber cloth roll penetrates through the main air duct shell to be fixed to the outer ring of the main sleeve rod A. An activated carbon detection module is arranged in the intelligent signal processor. The activated carbon detection module can regularly detect a main activated carbon fiber cloth roll in the main air duct by using a main activated carbon fiber cloth detector, so that the automatic detection function of activated carbon fiber cloth is realized, and the activated carbon detection module controls the rotation of a main motor in a main fiber cloth replacer; the function of automatically replacing the activated carbon fiber cloth can be realized.

Description

Technical Field

[0001] The invention relates to an exhaust gas purification device, in particular to an injection molding exhaust gas purification treatment device applied in the technical field of injection molding devices. Background Art

[0002] Plastic products have become the most common items in our lives, and injection molding is the most commonly used production method. However, a large amount of organic waste gas will be generated during the injection molding process. If these waste gases are directly discharged into the atmosphere without treatment, they will have a certain impact on the environment and human health.

[0003] The patent with publication number CN215463060U discloses an injection molding waste gas treatment device, including a purification box, in which a primary filter, an activated carbon adsorption component and a spray component are arranged, one end of the purification box is provided with a waste gas inlet, the other end is provided with a clean gas outlet, and a variable diameter air inlet is provided between the purification box and the waste gas inlet, the primary filter includes a first filter layer and a second filter layer, the spray component includes a spray pipeline arranged in the purification box, a plurality of nozzles arranged in the spray pipeline and a spray control valve arranged on the spray pipeline. The injection molding waste gas treatment device mainly uses an activated carbon adsorption method to treat the waste gas, but this method has an adsorption saturation problem, and personnel are required to check and replace it regularly, which will increase the investment in human resources.

[0004] In order to solve the problem that some injection molding waste gas treatment devices using activated carbon adsorption method need to be regularly inspected and replaced by personnel, this solution proposes an injection molding waste gas treatment device. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that some injection molding waste gas treatment devices using the activated carbon adsorption method need to be regularly inspected and replaced by personnel.

[0006] In order to solve the above problems, the present invention provides an injection molding waste gas purification treatment device, including a control panel, a main air duct and an intelligent signal processor; the main air duct includes a main air duct shell, an exhaust fan A arranged at the air inlet of the main air duct shell, and main fiber cloth replacers are arranged on both sides of the main air duct shell. The main fiber cloth replacer includes a plurality of main rotary dampers arranged on one side of the main air duct shell and a plurality of main motors arranged on the other side of the main air duct shell, each main rotary damper is connected to a main sleeve rod A, and the output end of each main motor is connected to a main sleeve rod B, and a main activated carbon fiber cloth roll is installed on the main sleeve rod B, and the main activated carbon fiber cloth The end of the roll passes through the main air duct shell and is fixed to the outer ring of the main sleeve rod A. A main pressure sensor is arranged in each main rotary damper. A partition plate is arranged on the top of the main air duct. A plurality of main activated carbon fiber cloth detectors are arranged on the lower side of the partition plate. An anemometer is arranged at the air outlet of the main air duct shell. The control panel is installed on the main air duct shell. An activated carbon detection module and a wind speed adjustment module are arranged on the intelligent signal processor. The wind speed adjustment module is electrically connected to the exhaust fan A and the anemometer respectively. The activated carbon detection module is electrically connected to a plurality of main activated carbon fiber cloth detectors, a plurality of main pressure sensors, a plurality of main motors and the control panel respectively.

[0007] In the above-mentioned injection molding waste gas purification treatment device, by providing a fiber cloth replacer and an activated carbon fiber cloth detector, the function of automatic detection and replacement of the activated carbon fiber cloth is realized.

[0008] As a further improvement of the present application, an electric venetian blind A is provided at the air outlet of the main air duct shell, a VOCs detector is installed at the air outlet of the main air duct shell, an auxiliary air duct is provided above the main air duct, the auxiliary air duct includes an auxiliary air duct shell, an electric venetian blind B is provided in the air inlet of the auxiliary air duct shell, an exhaust fan B is provided above the electric venetian blind B, an electric venetian blind C is provided in the air outlet of the auxiliary air duct shell, the intelligent signal processor also includes a gas detection module, and the gas detection module is electrically connected to the VOCs detector, electric venetian blind A, electric venetian blind B, exhaust fan B, activated carbon detection module, electric venetian blind C and control panel respectively.

[0009] As a further improvement of the present application, auxiliary fiber cloth replacers are arranged on both sides of the auxiliary air duct shell, and the auxiliary fiber cloth replacers include a plurality of auxiliary rotary dampers arranged on one side of the auxiliary air duct shell and a plurality of auxiliary motors arranged on the other side of the auxiliary air duct shell, each auxiliary rotary damper is connected to a auxiliary sleeve rod A, and the output end of each auxiliary motor is connected to a auxiliary sleeve rod B, and an auxiliary activated carbon fiber cloth roll is installed on the auxiliary sleeve rod B, and the end of the auxiliary activated carbon fiber cloth roll passes through the auxiliary air duct shell and is fixed to the outer ring of the auxiliary sleeve rod A, and a secondary pressure sensor is arranged in each auxiliary rotary damper.

[0010] As a further improvement of the present application, a plurality of auxiliary activated carbon fiber cloth detectors are arranged on the inner wall at the top of the auxiliary air duct shell, and the activated carbon detection module is electrically connected to the plurality of auxiliary activated carbon fiber cloth detectors, the plurality of auxiliary pressure sensors and the plurality of auxiliary motors respectively.

[0011] As another improvement of the present application, through grooves are opened on the main air duct shell corresponding to the multiple main activated carbon fiber cloth rolls, and the multiple through grooves on the main air duct shell are all installed with sealing rings.

[0012] As another improvement supplement of the present application, through grooves are opened on the auxiliary air duct shell corresponding to the multiple auxiliary activated carbon fiber cloth rolls, and the multiple through grooves on the auxiliary air duct shell are all installed with sealing rings 2.

[0013] As another improved supplement of the present application, the electric venetian blind B is fixed to the auxiliary air duct housing through a partition plate, and the inner walls of the main air duct housing and the auxiliary air duct housing are both provided with a protective coating.

[0014] As another improvement of the present application, a protective shell is disposed on the periphery of the main fiber cloth replacer, and a protective shell is disposed on the periphery of the secondary fiber cloth replacer.

[0015] To summarize, the activated carbon detection module will perform regular inspections on the main activated carbon fiber cloth rolls in the main air duct through multiple main activated carbon fiber cloth detectors. When the main activated carbon fiber cloth detector detects that the main activated carbon fiber cloth roll can no longer achieve a good filtering effect, the activated carbon detection module will control the main motor to rotate so that the main activated carbon fiber cloth roll in the main air duct is replaced. The above process realizes the functions of automatic detection and automatic replacement of activated carbon fiber cloth. In addition, in order to make the device have a better service life, the device is also provided with a wind speed adjustment module. The module will detect the wind speed in the main air duct through an anemometer. When the wind speed is detected to be lower than the set value, the wind speed adjustment module will control the exhaust fan A to increase the speed. Conversely, when the wind speed is detected to be higher than the set value, the wind speed adjustment module will control the exhaust fan A to reduce the speed. The device has both good purification effect and realizes long-term operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural diagram of an exhaust gas purification device according to the first and second embodiments of the present application;

[0017] Figure 2 A three-dimensional cross-sectional view of an exhaust gas purification device according to the first and second embodiments of the present application;

[0018] Figure 3 This is a three-dimensional structural diagram of the main fiber cloth replacer of the first embodiment of the present application;

[0019] Figure 4This is an installation diagram of the main fiber cloth replacer according to the first embodiment of the present application;

[0020] Figure 5 This is a structural diagram of the main air duct outlet area of ​​the first and second implementation modes of the present application;

[0021] Figure 6 This is a structural diagram of the main air duct air inlet area of ​​the first and second implementation modes of the present application;

[0022] Figure 7 This is a control principle block diagram of an intelligent signal processor according to the first embodiment of the present application;

[0023] Figure 8 This is an installation diagram of a secondary fiber cloth replacer according to a second embodiment of the present application;

[0024] Fig. 9 This is a block diagram of the control principle of the intelligent signal processor of the second embodiment of the present application.

[0025] Description of the numbers in the figure:

[0026] 1. Control panel; 2. Main air duct; 3. Auxiliary air duct; 4. Main fiber cloth replacer; 5. Auxiliary fiber cloth replacer; 21. Main air duct housing; 22. Exhaust fan A; 23. VOCs detector; 24. Electric venetian blinds A; 25. Dividing plate; 31. Auxiliary air duct housing; 32. Electric venetian blinds B; 33. Exhaust fan B; 34. Electric venetian blinds C; 41. Main activated carbon fiber cloth roll; 42. Main sleeve rod A; 43. Main rotary damper; 44. Main sleeve rod B; 45. Main motor; 51. Auxiliary activated carbon fiber cloth roll; 52. Auxiliary sleeve rod A; 53. Auxiliary rotary damper; 54. Auxiliary sleeve rod B; 55. Auxiliary motor. DETAILED DESCRIPTION

[0027] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0028] The first implementation method:

[0029] See also Figure 1-Figure 7, an injection molding waste gas purification treatment device, comprising a control panel 1, a main air duct 2 and an intelligent signal processor; the main air duct 2 comprises a main air duct shell 21, an exhaust fan A22 arranged at the air inlet of the main air duct shell 21, and main fiber cloth replacers 4 are arranged on both sides of the main air duct shell 21. The main fiber cloth replacer 4 comprises a plurality of main rotary dampers 43 arranged on one side of the main air duct shell 21 and a plurality of main motors 45 arranged on the other side of the main air duct shell 21. Each main rotary damper 43 is connected to a main sleeve rod A42, and the output end of each main motor 45 is connected to a main sleeve rod B44, on which a main activated carbon fiber cloth roll 41 is installed. The end of the main activated carbon fiber cloth roll 41 passes through the main air duct shell 21 and is fixed to the outer ring of the main sleeve rod A42. The main sleeve rod A42 is installed with an unused main activated carbon fiber cloth roll 41, and the main sleeve rod B44 is installed with a used The main activated carbon fiber cloth roll 41 after use is provided with a main rotating damper 43 to prevent the main activated carbon fiber cloth roll 41 on the main sleeve rod A42 from being blown away by the wind, thereby hindering the normal operation of the main fiber cloth replacer 4. Each main rotating damper 43 is provided with a main pressure sensor. The main pressure sensor is used to measure the pressure on the main sleeve rod A42. A partition plate 25 is provided on the top of the main air duct 2, and a plurality of main activated carbon fiber cloth detectors are provided on the lower side of the partition plate 25. The main activated carbon fiber cloth detector is a detector for judging the use status of the main activated carbon fiber cloth roll 41 by color. Due to the low visibility inside the exhaust gas purification device, the main activated carbon fiber cloth detector has its own lighting system, but it is only illuminated during regular inspections. An anemometer is provided at the air outlet of the main air duct shell 21, and the anemometer can detect the wind speed at the air outlet of the main air duct shell 21.

[0030] In addition, the control panel 1 is installed on the main air duct housing 21, and an activated carbon detection module and a wind speed adjustment module are arranged on the intelligent signal processor. The wind speed adjustment module is electrically connected to the exhaust fan A22 and the anemometer respectively. The wind speed adjustment module detects the wind speed at the air outlet of the main air duct 2 through the anemometer. When the wind speed is lower than the set value (the wind speed adjustment module is preset with the normal wind speed of the exhaust gas purification device), the wind speed adjustment module will increase the operating power of the exhaust fan A22. When the wind speed is higher than the set value, the wind speed adjustment module will reduce the operating power of the exhaust fan A22. The activated carbon detection module is electrically connected to multiple main activated carbon fiber cloth detectors, multiple main pressure sensors, multiple main motors 45 and the control panel 1 respectively. When the activated carbon detection module detects that the state of the main activated carbon fiber cloth roll 41 is poor through the main activated carbon fiber cloth detector, the activated carbon detection module will control the main motor 45 to drive the main sleeve rod B44 to rotate, so that the main activated carbon fiber cloth roll 41 is rolled up to the main sleeve rod B44, thereby replacing the main activated carbon fiber cloth roll 41. When the main activated carbon fiber cloth roll 41 on the main sleeve rod A42 is used up, the main pressure sensor will be subjected to a force greater than normal use under the action of the main motor 45. At this time, the activated carbon detection module will stop the rotation of the main motor 45 and display on the control panel 1 that the corresponding main activated carbon fiber cloth roll 41 is used up, reminding the operator to replace the main activated carbon fiber cloth roll 41.

[0031] To sum up, when the above-mentioned exhaust gas purification device is operating normally, the activated carbon detection module will use multiple main activated carbon fiber cloth detectors to perform regular detection on the main activated carbon fiber cloth roll 41 in the main air duct 2. When the main activated carbon fiber cloth detector detects that the main activated carbon fiber cloth roll 41 can no longer achieve a good filtering effect, the activated carbon detection module will control the main motor 45 to rotate and roll the used main activated carbon fiber cloth roll 41 onto the main sleeve rod B44, and the unused main activated carbon fiber cloth roll 41 on the main sleeve rod A42 is brought into the main air duct shell 21, thereby realizing the replacement of the main activated carbon fiber cloth roll 41. When the unused main activated carbon fiber cloth roll 41 on the main sleeve rod A42 is used up, the rotation of the main motor 45 during the replacement process is A force greater than that in normal use will be applied to the main pressure sensor in the main rotary damper 43. After receiving the pressure value transmitted by the main pressure sensor, the activated carbon detection module will determine that the main activated carbon fiber cloth roll 41 on the main sleeve rod A42 has been used up, and display the information on the control panel 1 to remind personnel to replace it, and stop the rotation of the main motor 45 at the same time; when the exhaust gas purification device is in use, in order to make the device have a better service life, the wind speed adjustment module of the device will detect the wind speed in the main air duct 2 through the anemometer. When the wind speed is detected to be lower than the set value, the wind speed adjustment module will control the exhaust fan A22 to increase the speed. Conversely, when the wind speed is detected to be higher than the set value, the wind speed adjustment module will control the exhaust fan A22 to reduce the speed to achieve long-term operation of the device.

[0032] In addition, through grooves are opened on the main air duct shell 21 corresponding to the multiple main activated carbon fiber cloth rolls 41. The width of the through grooves is relatively narrow, and only the main activated carbon fiber cloth rolls 41 are allowed to pass through. The multiple through grooves on the main air duct shell 21 are installed with a sealing ring 1. The function of the sealing ring 1 is to prevent the unpurified exhaust gas in the main air duct 2 from leaking from the through groove, thereby avoiding air pollution; the inner wall of the main air duct shell 21 is provided with a protective coating. The function of the protective coating is to prevent the organic particles in the injection molding exhaust gas from attaching to the inner wall of the main air duct shell 21 during the long-term use of the exhaust gas purification device, causing the need for personnel to clean; a protective shell is provided on the periphery of the main fiber cloth replacer 4. The protective shell is provided because the exhaust gas purification device is mostly installed outdoors, and the main activated carbon fiber cloth roll 41 may be damaged due to weather or other factors, thereby causing unnecessary losses.

[0033] The second implementation method:

[0034] See also Figure 2 , Figure 8 and Fig. 9 , which is different from the first embodiment, an electric blind A24 is provided at the air outlet of the main air duct housing 21, and the electric blind A24 can control the automatic opening or closing of the blind by a motor, and a VOCs detector 23 is installed at the air outlet of the main air duct housing 21, and the VOCs detector 23 can detect the content of volatile organic matter in the injection molding waste gas. VOCs is a class of organic compounds that are volatile at room temperature. An auxiliary air duct 3 is provided above the main air duct 2, and the auxiliary air duct 3 includes an auxiliary air duct housing 31. An electric blind B32 is provided in the air inlet of the auxiliary air duct housing 31, and an exhaust fan B33 is provided above the electric blind B32. When the exhaust fan B33 is in operation, it can effectively guide the gas from the main air duct 2 into the auxiliary air duct 3, and in the auxiliary air duct 3 For directional circulation, an electric venetian blind C34 is arranged in the air outlet of the auxiliary air duct shell 31, and the intelligent signal processor also includes a gas detection module, which is electrically connected to the VOCs detector 23, the electric venetian blind A24, the electric venetian blind B32, the exhaust fan B33, the activated carbon detection module, the electric venetian blind C34 and the control panel 1 respectively. The gas detection module will detect the gas in the air outlet area of ​​the main air duct 2 through the VOCs detector 23. When the gas detection module detects that the VOCs content of the gas exceeds the standard, the gas detection module will control the electric venetian blind A24 to close, the electric venetian blind B32 and the electric venetian blind C34 to open, and start the exhaust fan B33 to guide the gas from the main air duct 2 into the auxiliary air duct 3, so as to facilitate the subsequent purification of the gas.

[0035] In summary, in order to prevent the main activated carbon fiber cloth roll 41 from being damaged or the main activated carbon fiber cloth roll 41 being used up but no personnel replacing it in time, thereby causing the injection molding waste gas to pollute the air, the gas detection module of the waste gas purification device in the second implementation mode will detect the gas in the air outlet area of ​​the main air duct 2 through the VOCs detector 23 to detect whether the quality of the gas meets the label. When the gas detection module detects that the gas does not meet the standard, the gas detection module will control the electric venetian blind A24 to close, the electric venetian blind B32 and the electric venetian blind C34 to open, and start the exhaust fan B33 to guide the gas from the main air duct 2 into the auxiliary air duct 3, so that the gas that does not meet the standard can be discharged. The standard gas is purified again and finally discharged into the air. At the same time, the gas detection module will send a switching signal to the activated carbon detection module. If the main activated carbon fiber cloth roll 41 on the main sleeve rod A42 is not used up at this time, the activated carbon detection module will control the main motor 45 to switch the main activated carbon fiber cloth roll 41. On the contrary, if the main activated carbon fiber cloth roll 41 is used up, it will not respond; when the gas detection module detects through the VOCs detector 23 that the purification function of the main air duct 2 has returned to normal, the gas detection module will control the electric blinds A24 to open, the electric blinds B32 and the electric blinds C34 to close, and stop the operation of the exhaust fan B33.

[0036] In addition, auxiliary fiber cloth replacers 5 are arranged on both sides of the auxiliary air duct housing 31. The auxiliary fiber cloth replacers 5 include a plurality of auxiliary rotary dampers 53 arranged on one side of the auxiliary air duct housing 31 and a plurality of auxiliary motors 55 arranged on the other side of the auxiliary air duct housing 31. Each auxiliary rotary damper 53 is connected to an auxiliary sleeve rod A52. The output end of each auxiliary motor 55 is connected to an auxiliary sleeve rod B54. An auxiliary activated carbon fiber cloth roll 51 is installed on the auxiliary sleeve rod B54. The end of the auxiliary activated carbon fiber cloth roll 51 passes through the auxiliary air duct housing 31 and the auxiliary air duct housing 31. The outer ring of the sleeve rod A52 is fixed, and an unused auxiliary activated carbon fiber cloth roll 51 is installed on the auxiliary sleeve rod A52, and a used auxiliary activated carbon fiber cloth roll 51 is installed on the auxiliary sleeve rod B54. The function of setting the auxiliary rotation damper 53 is to prevent the auxiliary activated carbon fiber cloth roll 51 on the auxiliary sleeve rod A52 from being blown away by the wind, thereby hindering the normal operation of the auxiliary fiber cloth replacer 5. A auxiliary pressure sensor is arranged in each auxiliary rotation damper 53, and the function of the auxiliary pressure sensor is to measure the pressure on the auxiliary sleeve rod A52.

[0037] In addition, a plurality of auxiliary activated carbon fiber cloth detectors are arranged on the inner wall at the top of the auxiliary air duct shell 31, and the activated carbon detection module is electrically connected to the plurality of auxiliary activated carbon fiber cloth detectors, the plurality of auxiliary pressure sensors and the plurality of auxiliary motors 55 respectively. When the activated carbon detection module detects that the auxiliary activated carbon fiber cloth roll 51 is in a poor state through the auxiliary activated carbon fiber cloth detector, the activated carbon detection module will control the auxiliary motor 55 to drive the auxiliary sleeve rod B54 to rotate, so that the used auxiliary activated carbon fiber cloth roll 51 is rolled up to the auxiliary sleeve rod B54, thereby replacing the auxiliary activated carbon fiber cloth roll 51. When the auxiliary activated carbon fiber cloth roll 51 on the auxiliary sleeve rod A52 is used up, the auxiliary pressure sensor will be subjected to a greater force under the action of the auxiliary motor 55. At this time, the activated carbon detection module will stop the rotation of the auxiliary motor 55, and display on the control panel 1 that the corresponding auxiliary activated carbon fiber cloth roll 51 is used up, reminding the operator to replace the auxiliary activated carbon fiber cloth roll 51.

[0038] In addition, through grooves are opened on the auxiliary air duct shell 31 corresponding to the multiple auxiliary activated carbon fiber cloth rolls 51. The width of the through grooves is relatively narrow, and only the auxiliary activated carbon fiber cloth rolls 51 are allowed to pass through. The multiple through grooves on the auxiliary air duct shell 31 are installed with sealing rings 2. The function of the sealing rings 2 is to prevent the unpurified exhaust gas in the auxiliary air duct 3 from leaking from the through grooves, thereby causing air pollution.

[0039] In addition, the electric venetian blind B32 is fixed to the auxiliary air duct shell 31 through the dividing plate 25. The inner wall of the auxiliary air duct shell 31 is provided with a protective coating. The function of the protective coating is to prevent the organic particles in the injection molding exhaust gas from attaching to the inner wall of the auxiliary air duct shell 31 during the long-term use of the exhaust gas purification device, causing the need for personnel to clean up. A protective shell is provided on the periphery of the auxiliary fiber cloth replacer 5. The protective shell is provided because the exhaust gas purification device is mostly installed outdoors, and the auxiliary activated carbon fiber cloth roll 51 may be damaged due to weather or other factors, thereby causing unnecessary losses.

[0040] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An injection molding waste gas purification device, characterized in that: It comprises a control panel (1), a main air duct (2) and an intelligent signal processor; The main air duct (2) comprises a main air duct housing (21), an exhaust fan A (22) arranged at the air inlet of the main air duct housing (21), main fiber cloth replacers (4) are arranged on both sides of the main air duct housing (21), and the main fiber cloth replacer (4) comprises a plurality of main rotary dampers (43) arranged on one side of the main air duct housing (21) and a plurality of main motors (45) arranged on the other side of the main air duct housing (21), each of the main rotary dampers (43) is connected to a main sleeve rod A (42), and the output of each main motor (45) is connected to a main sleeve rod A (42). The ends of the main sleeve rods (44) are connected to the main sleeve rods B (44), a main activated carbon fiber cloth roll (41) is installed on the main sleeve rods B (44), the end of the main activated carbon fiber cloth roll (41) passes through the main air duct shell (21) and is fixed to the outer ring of the main sleeve rod A (42), each of the main rotary dampers (43) is provided with a main pressure sensor, a partition plate (25) is provided at the top of the main air duct (2), a plurality of main activated carbon fiber cloth detectors are provided on the lower side of the partition plate (25), and an anemometer is provided at the air outlet of the main air duct shell (21); The control panel (1) is mounted on the main air duct housing (21); an activated carbon detection module and a wind speed adjustment module are provided on the intelligent signal processor; the wind speed adjustment module is electrically connected to the exhaust fan A (22) and the anemometer, respectively; and the activated carbon detection module is electrically connected to a plurality of main activated carbon fiber cloth detectors, a plurality of main pressure sensors, a plurality of main motors (45) and the control panel (1), respectively.

2. The injection molding waste gas purification treatment device according to claim 1, characterized in that: An electric blind A (24) is arranged at the air outlet of the main air duct housing (21); a VOCs detector (23) is installed at the air outlet of the main air duct housing (21); an auxiliary air duct (3) is arranged above the main air duct (2); the auxiliary air duct (3) comprises an auxiliary air duct housing (31); an electric blind B (32) is arranged in the air inlet of the auxiliary air duct housing (31); an exhaust fan B (33) is arranged above the electric blind B (32); an electric blind C (34) is arranged in the air outlet of the auxiliary air duct housing (31); the intelligent signal processor further comprises a gas detection module; the gas detection module is electrically connected to the VOCs detector (23), the electric blind A (24), the electric blind B (32), the exhaust fan B (33), the activated carbon detection module, the electric blind C (34) and the control panel (1) respectively.

3. The injection molding waste gas purification device according to claim 2, characterized in that: Auxiliary fiber cloth replacers (5) are arranged on both sides of the auxiliary air duct housing (31), and the auxiliary fiber cloth replacers (5) include a plurality of auxiliary rotation dampers (53) arranged on one side of the auxiliary air duct housing (31) and a plurality of auxiliary motors (55) arranged on the other side of the auxiliary air duct housing (31). Each of the auxiliary rotation dampers (53) is connected to an auxiliary sleeve rod A (52), and the output end of each auxiliary motor (55) is connected to an auxiliary sleeve rod B (54). An auxiliary activated carbon fiber cloth roll (51) is installed on the auxiliary sleeve rod B (54). The end of the auxiliary activated carbon fiber cloth roll (51) passes through the auxiliary air duct housing (31) and is fixed to the outer ring of the auxiliary sleeve rod A (52). Each of the auxiliary rotation dampers (53) is provided with an auxiliary pressure sensor.

4. The injection molding waste gas purification treatment device according to claim 3, characterized in that: A plurality of auxiliary activated carbon fiber cloth detectors are arranged on the inner wall at the top of the auxiliary air duct housing (31), and the activated carbon detection module is electrically connected to the plurality of auxiliary activated carbon fiber cloth detectors, the plurality of auxiliary pressure sensors and the plurality of auxiliary motors (55), respectively.

5. The device for purifying and treating injection molding waste gas according to claim 1, characterized in that: The main air duct housing (21) is provided with through grooves corresponding to the plurality of main activated carbon fiber cloth rolls (41), and the plurality of through grooves on the main air duct housing (21) are each provided with a sealing ring.

6. The device for purifying and treating injection molding waste gas according to claim 3, characterized in that: The auxiliary air duct housing (31) is provided with through grooves corresponding to the plurality of auxiliary activated carbon fiber cloth rolls (51), and the plurality of through grooves on the auxiliary air duct housing (31) are each provided with a second sealing ring.

7. The device for purifying and treating injection molding waste gas according to claim 2, characterized in that: The electric venetian blind B (32) is fixed to the auxiliary air duct housing (31) via a partition plate (25), and the inner walls of the main air duct housing (21) and the auxiliary air duct housing (31) are both provided with a protective coating.

8. The device for purifying and treating injection molding waste gas according to claim 3, characterized in that: A protective shell is disposed on the periphery of the main fiber cloth replacer (4), and a protective shell is disposed on the periphery of the secondary fiber cloth replacer (5).

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