Waste gas purification device for injection molding machine

Abstract

The invention relates to the technical field of injection molding machine waste gas treatment, and discloses an injection molding machine waste gas purification device which comprises a purification box, a dust removal box is arranged at the top of the purification box, an odor removal box is arranged on the right side wall of the purification box, a gas transmission mechanism connected with the purification box is arranged on the purification box, and a gas inlet pipe fixedly penetrates through the top of the dust removal box. According to the waste gas purification device for the injection molding machine, the waste gas purification effect is greatly improved through multi-link treatment of dust removal through the filter screen of the dust removal box, aeration treatment of chemical harmful substances through the purification box and deodorization through activated carbon of the deodorization box; dust, chemical harmful substances and peculiar smell can be effectively removed; filter screen vibration anti-blocking and aeration pipe angle dynamic adjustment are achieved, stable operation of equipment is guaranteed, purification uniformity is improved, meanwhile, treatment liquid is treated in a centralized mode, secondary pollution is avoided, and the energy utilization rate is increased.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine exhaust gas treatment technology, specifically to an injection molding machine exhaust gas purification device. Background Technology

[0002] In the plastics processing industry, injection molding machines are widely used as core production equipment in the molding and processing of various plastic products. Their working principle involves heating the plastic raw material to a molten state, then injecting the molten plastic into the mold cavity under high pressure. After cooling and solidification, the desired product is obtained. However, during the heating and melting of the plastic raw material, injection molding, and mold opening and closing, a large amount of waste gas is generated due to the thermal decomposition of the raw material and the volatilization of low-boiling-point components. This waste gas becomes the main source of air pollutants in the injection molding production process. Therefore, when using injection molding machines, waste gas purification devices are also used to treat the waste gas. However, existing waste gas purification devices still have certain shortcomings, such as:

[0003] The "Injection Molding Machine Exhaust Gas Recovery Device" with application number CN202422324176.4 has a single method for purifying injection molding machine exhaust gas. The simple physical adsorption of activated carbon plates is difficult to effectively purify the chemical harmful substances in the exhaust gas, and it is difficult to meet the purification needs of dust, chemical harmful substances and odors in injection molding machine exhaust gas.

[0004] In view of this, and in response to the above problems, an in-depth study was conducted, and a purification device for injection molding machine exhaust gas was proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an injection molding machine exhaust gas purification device to solve the problem mentioned in the background art that existing exhaust gas purification devices have a single purification method and are difficult to effectively purify multiple pollutants in the exhaust gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection molding machine exhaust gas purification device, comprising a purification box, a dust removal box at the top of the purification box, and an odor removal box on the right side wall of the purification box;

[0007] The purification box is equipped with an air supply mechanism connected to the purification box. An air inlet pipe is fixedly and continuously installed on the top of the dust removal box. A filter frame is movably installed inside the dust removal box, and a filter screen is installed inside it. A through pipe is fixedly and continuously connected to the right side wall of the purification box, and the through pipe is fixedly and continuously installed through the left side wall of the deodorizing box. An activated carbon plate is installed inside the deodorizing box, and an exhaust pipe is fixedly and continuously installed through the right side wall of the deodorizing box.

[0008] The dust collection box is equipped with a drive mechanism, and the bottom of the drive mechanism is equipped with an elastic vibration mechanism for the reciprocating movement of the filter frame. The elastic vibration mechanism is connected to the gas supply mechanism through a transmission mechanism. The left end of the drive mechanism is connected to an evaporation and crystallization mechanism, which is connected to the purification box through a pump mechanism. The evaporation and crystallization mechanism is connected to the dust collection box through a heat conduction mechanism.

[0009] The above technical solution facilitates the realization of a complete purification process, including dust interception, treatment of hazardous chemicals, and odor adsorption. At the same time, the design of power transmission and heat recovery between mechanisms improves the overall energy efficiency and operational stability of the device, solving the problems of single purification method and incomplete treatment in existing devices.

[0010] As a preferred embodiment of the present invention, the gas supply mechanism includes a vacuum pump, which is fixedly installed on the top surface of the purification box. The inlet end of the vacuum pump is fixedly connected to the right end of the vacuum pipe, and the vacuum pipe is fixedly passed through the lower end of the right side wall of the purification box. The outlet end of the vacuum pump is fixedly connected to one end of the gas supply pipe, and the gas supply pipe is fixedly passed through the top of the purification box. The other end of the gas supply pipe is fixedly connected to the top of the U-shaped pipe. The bottom of the front and rear sides of the U-shaped pipe is connected to an aeration pipe through a sealed rotary joint, and an aeration port is provided on the aeration pipe.

[0011] The above technical solution facilitates the extraction of waste gas flow via a vacuum pump, which is then diverted to the aeration pipe through a U-shaped tube. The gas is then sprayed out through the aeration port and comes into full contact with the treatment liquid in the purification tank, thereby fully purifying the chemical pollutants in the waste gas.

[0012] As a preferred embodiment of the present invention, the driving mechanism includes a driving rod, the driving rod having a transverse bearing that penetrates the left side wall of the purification chamber, and the right end of the driving rod extending into the interior of the extraction pipe. The axis of the driving rod is collinear with the axis of the extraction pipe, and a turbofan is coaxially fixedly mounted on the right end of the driving rod, the turbofan being located inside the extraction pipe.

[0013] The above technical solution facilitates the use of the kinetic energy of the exhaust gas flow in the extraction pipe to drive the turbine fan to rotate, thereby driving the drive rod to rotate synchronously.

[0014] As a preferred embodiment of the present invention, the elastic vibration mechanism includes a cam, which is fixedly mounted on the surface of the drive rod, and the bottom of the cam movably abuts against a lifting plate. A slide rod is longitudinally fixedly installed through both ends of the lifting plate, and the top end of the slide rod is fixedly connected to the bottom surface of the filter frame. The right side of the filter frame is longitudinally slidably connected to the right inner wall of the dust collector. The slide rod sequentially slides through the bottom of the dust collector and the top of the purification box, and a spring is sleeved on the outer side of the slide rod. The top end of the spring is fixedly connected to the bottom surface of the lifting plate, and the bottom end of the spring is fixedly connected to the inner bottom surface of the dust collector.

[0015] By adopting the above technical solution, the cam can be rotated eccentrically by the drive rod, and with the elastic reset effect of the spring, the lifting plate can be driven to move the slide bar up and down reciprocally, thereby causing the filter frame to generate high-frequency micro-vibration, effectively shaking off the dust attached to the filter screen, preventing filter screen blockage, and ensuring the long-term stable dust interception effect of the dust collector.

[0016] As a preferred embodiment of the present invention, the transmission mechanism includes a movable rod, the top end of which is rotatably connected to the bottom end of a sliding rod, and the bottom end of which is rotatably connected to the top surface of a rack. A sliding plate is fixedly installed on the top surface of the rack, and the top surface of the sliding plate is slidably connected to the inner top surface of the purification box. The rack is meshed with a transmission gear fixedly installed on the surface of the aeration pipe.

[0017] By adopting the above technical solution, the up-and-down reciprocating motion of the slide bar can be converted into the left-and-right linear motion of the rack through the movable rod. Then, by using the meshing transmission between the rack and the transmission gear, the aeration pipe is driven to rotate around the sealed rotary joint, so as to realize the dynamic adjustment of the orientation of the aeration port, expand the contact range between the treated liquid and the waste gas, and improve the uniformity of purification.

[0018] As a preferred embodiment of the present invention, the evaporation and crystallization mechanism includes a tank body, which is fixedly installed on the left side of the purification chamber. A discharge pipe with a valve is fixedly installed through the center of the bottom of the tank body. A rotating rod is installed through the center of the top of the tank body via a longitudinal bearing, and the rotating rod bearing extends through the bottom of the housing. The housing body is fixedly installed on the left side of the dust removal chamber, and the left end of the drive rod extends into the interior of the housing. A bevel gear set is fixedly installed on the surface of the drive rod, and the bevel gear set is fixedly connected to the top end of the rotating rod. A stirring blade is fixedly installed on the surface of the rotating rod, and the stirring blade is located inside the tank body. An electric heating plate is embedded in the inner wall of the tank body, and a receiving pipe is fixedly installed through the top surface of the tank body. A stirring scraper is fixedly installed on the lower end of the rotating rod via a mounting rod, and the stirring scraper is in contact with the inner bottom surface of the tank body.

[0019] The above technical solution facilitates the conversion of the horizontal rotation of the drive rod into the vertical rotation of the rotating rod via a bevel gear set. This drives the stirring blades to agitate the liquid to be treated in the tank. Combined with the heating effect of the electric heating plate, this accelerates water evaporation and contaminant crystallization. Simultaneously, the stirring scraper removes crystals adhering to the bottom surface of the tank, preventing scaling from affecting heating efficiency. The crystals are ultimately discharged through a valved discharge pipe, achieving centralized treatment of contaminants and avoiding secondary pollution. The receiving pipe collects the steam generated by evaporation, facilitating subsequent condensation recovery or harmless treatment.

[0020] As a preferred embodiment of the present invention, the pumping mechanism includes a water pump, which is fixedly installed on the left side wall of the purification tank. The water pump inlet is fixedly connected to one end of the water pumping pipe, and one end of the water pumping pipe is fixedly connected to the lower end of the left side wall of the purification tank. The water pump outlet is fixedly connected to one end of the water supply pipe, and the other end of the water supply pipe is fixedly connected to the top of the tank.

[0021] The above technical solution facilitates the transfer of the treatment liquid for purifying hazardous chemicals in the purification box to the tank body through the cooperation of water pumps, water extraction pipes and water delivery pipes.

[0022] As a preferred embodiment of the present invention, the heat conduction mechanism includes a heat conduction frame, which is installed on the inner bottom surface of the dust collection box, and a plurality of heat conduction fins are evenly arranged on the top surface of the heat conduction frame. A heat conduction strip is fixedly installed on the left side of the heat conduction frame, and the heat conduction strip passes through the bottom of the dust collection box, the top and left side wall of the purification box, and the upper end of the right side wall of the tank in sequence.

[0023] By adopting the above technical solution, it is convenient to efficiently transfer the heat carried in the exhaust gas to the heat conduction frame through the heat conduction fins, and then to the tank through the heat conduction strip, which is conducive to the auxiliary heating of the treatment liquid in the tank by the heat in the exhaust gas.

[0024] As a preferred embodiment of the present invention, a discharge channel is fixedly and continuously provided on the left side wall of the dust collector, and the left end of the filter frame extends into the interior of the discharge channel. The width of the filter frame matches the width of the dust collector and the discharge channel. The bottom surface of the filter frame is connected to the inner bottom of the discharge channel by an elastic band.

[0025] By adopting the above technical solution, the dust shaken off when the filter frame vibrates can be directly discharged through the discharge channel, while the elastic belt can maintain a sealed state when the filter frame vibrates up and down, and at the same time provide a certain buffer for the filter frame.

[0026] As a preferred embodiment of the present invention, a motor is fixedly installed on the left side of the housing, and the output shaft bearing of the motor passes through the left side wall of the housing. The axis of the motor output shaft is collinear with the axis of the drive rod, and the shaft end of the motor is magnetically connected to the left end of the drive rod.

[0027] The above technical solution facilitates the use of a motor to provide auxiliary power to the drive rod.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the injection molding machine exhaust gas purification device;

[0029] 1. By setting up a dust collection box, a purification box, and a deodorization box, the exhaust gas first enters the dust collection box, where it undergoes preliminary dust removal through the filter screen in the filter frame. The exhaust gas is then drawn in and transported by an air pump, and aerated through an aeration pipe into the treatment liquid in the purification box, ensuring full contact between the exhaust gas and the treatment liquid to treat the chemical substances in the exhaust gas. Finally, it enters the deodorization box, where it is deodorized by activated carbon plates. After multiple stages of treatment, the exhaust gas purification effect is significantly improved, effectively removing dust, harmful chemicals, and odors from the exhaust gas, meeting the purification needs of injection molding machine exhaust gas with multiple coexisting pollutants, and significantly enhancing the purification effect.

[0030] 2. During the flow of exhaust gas, the turbofan drives the drive rod to rotate, which in turn drives the cam to rotate. Under the elastic action of the spring, the lifting plate drives the slide rod and filter frame to move up and down reciprocally, ensuring that the filter frame generates high-frequency micro-vibration, effectively shaking off the dust attached to the filter screen and preventing the filter screen from clogging.

[0031] 3. The discharge channel on the left side of the dust collector box matches the width of the filter frame, and the bottom surface of the filter frame is connected to the inner bottom of the discharge channel by an elastic band, ensuring that dust can be smoothly discharged through the discharge channel and maintaining a seal; at the same time, the elastic band provides cushioning for the filter frame, reducing vibration damage to the structure and improving overall operational reliability.

[0032] 4. The up-and-down reciprocating motion of the slide bar is converted into the left-and-right sliding of the rack through the movable rod, which in turn drives the transmission gear on the surface of the aeration pipe to rotate, so that the angle of the aeration pipe can be dynamically adjusted around the sealed rotary joint. This design expands the coverage of the aeration port, allowing the waste gas to come into more full contact with the treatment liquid, and further improves the removal efficiency of chemical pollutants.

[0033] 5. The treatment liquid that adsorbs harmful chemicals in the purification tank is pumped into the tank by starting a water pump. When the drive rod rotates, it drives the rotating rod and stirring blades through a bevel gear set. At the same time, the electric heating plate is activated to heat the treatment liquid in the tank, thereby accelerating water evaporation and pollutant crystallization. The rotation of the rotating rod drives the stirring scraper to remove the crystals on the bottom surface of the tank, preventing scaling from affecting heating efficiency. The crystals are finally discharged through the discharge pipe with a valve, which facilitates subsequent harmless treatment. The steam generated by evaporation is collected through the receiving pipe and can be condensed and recovered or further treated to avoid direct discharge of the treatment liquid and secondary pollution, thus realizing closed-loop management of pollutants.

[0034] 6. The heat-conducting fins inside the dust collector efficiently absorb the heat carried by the exhaust gas and transfer it to the tank through the Z-shaped heat-conducting strips, providing auxiliary heating for the evaporation process of the treated liquid. This design reduces the energy consumption of the electric heating plate, lowers the energy cost of the evaporation and crystallization process, and at the same time realizes the recovery and utilization of waste heat from the exhaust gas, improving energy utilization efficiency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the front view structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the rear side view of the present invention;

[0037] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0038] Figure 4 This is a schematic diagram of the cross-sectional connection structure of the dust collector box, rotating rod, and exhaust pipe of the present invention;

[0039] Figure 5 This is a schematic diagram of the cross-sectional connection structure of the filter frame, the discharge channel, and the elastic band of the present invention;

[0040] Figure 6 This is a schematic diagram of the connection structure between the sealing rotary joint, the U-shaped tube, and the aeration tube of the present invention;

[0041] Figure 7 This is a schematic diagram of the connection structure between the movable rod, the sliding rod, and the rack of the present invention;

[0042] Figure 8 This is a schematic diagram of the cross-sectional connection between the tank body and the rotating rod of the present invention;

[0043] Figure 9 This is a schematic diagram showing the connection between the heat-conducting frame, heat-conducting fins, and heat-conducting strips of the present invention;

[0044] Figure 10 This is a schematic diagram of the cross-sectional connection structure between the housing and the motor in Embodiment 2 of the present invention.

[0045] In the diagram: 1. Purification box; 2. Dust removal box; 3. Odor removal box; 4. Filter frame; 5. Through pipe; 6. Activated carbon plate; 7. Exhaust pipe; 8. Air pump; 9. Air extraction pipe; 10. Air delivery pipe; 11. U-shaped pipe; 12. Sealing rotary joint; 13. Aeration pipe; 14. Drive rod; 15. Turbine fan; 16. Cam; 17. Lifting plate; 18. Slide rod; 19. Spring; 20. Discharge channel; 21. Elastic belt 22. Movable rod; 23. Rack; 24. Slide plate; 25. Transmission gear; 26. Tank body; 27. Rotating rod; 28. Shell; 29. ​​Bevel gear set; 30. Stirring blade; 31. Electric heating plate; 32. Material receiving pipe; 33. Agitating scraper; 34. Water pump; 35. Water suction pipe; 36. Water delivery pipe; 37. Heat conduction frame; 38. Heat conduction fins; 39. Heat conduction strip; 40. Air inlet pipe; 41. Motor. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1

[0048] Please see Figure 1 - Figure 9 The technical solution of this invention is as follows: A purification device for injection molding machine exhaust gas includes a purification box 1, a dust collection box 2 on the top of the purification box 1, a controller for controlling various electrical devices on the purification box 1, a liquid inlet pipe fixedly connected to the top surface of the purification box 1 for injecting treatment liquid (alkaline liquid), a deodorization box 3 on the right side wall of the purification box 1, a gas supply mechanism connected to the purification box 1, an air inlet pipe 40 fixedly connected to the top of the dust collection box 2, a filter frame 4 movably arranged inside the dust collection box 2, and a filter screen inside the filter frame 4. A pipe 5 is fixedly connected to the wall and passes through the left side wall of the deodorizing box 3. An activated carbon plate 6 is installed inside the deodorizing box 3, and an exhaust pipe 7 is fixedly installed through the right side wall of the deodorizing box 3. A drive mechanism is installed on the dust removal box 2. An elastic vibration mechanism for reciprocating movement of the filter frame 4 is installed at the bottom of the drive mechanism. The elastic vibration mechanism is connected to the gas supply mechanism through the transmission mechanism. An evaporation crystallization mechanism is connected to the left end of the drive mechanism. The evaporation crystallization mechanism is connected to the purification box 1 through the pump mechanism. The evaporation crystallization mechanism is connected to the dust removal box 2 through the heat conduction mechanism.

[0049] The gas supply mechanism includes a vacuum pump 8, which is fixedly installed on the top surface of the purification box 1. The air inlet of the vacuum pump 8 is fixedly connected to the right end of the vacuum pipe 9, and the vacuum pipe 9 is fixedly passed through the lower end of the right side wall of the purification box 1. The air outlet of the vacuum pump 8 is fixedly connected to one end of the gas supply pipe 10, and the gas supply pipe 10 is fixedly passed through the top of the purification box 1. The other end of the gas supply pipe 10 is fixedly connected to the top of the U-shaped pipe 11. The gas supply pipe 10 is located inside the purification box 1. The bottom of the front and rear sides of the U-shaped pipe 11 is connected to the aeration pipe 13 through the sealing rotary joint 12. The aeration pipe 13 is provided with aeration ports.

[0050] The drive mechanism includes a drive rod 14, which has a transverse bearing that passes through the left side wall of the purification chamber 1, and the right end of the drive rod 14 extends into the interior of the exhaust pipe 9. The axis of the drive rod 14 is collinear with the axis of the exhaust pipe 9, and a turbo fan 15 is coaxially fixedly installed at the right end of the drive rod 14. The turbo fan 15 is located inside the exhaust pipe 9.

[0051] The elastic vibration mechanism includes a cam 16, which is fixedly mounted on the surface of the drive rod 14. The bottom of the cam 16 movably abuts against a lifting plate 17. A slide rod 18 is longitudinally fixedly installed through both ends of the lifting plate 17. The top end of the slide rod 18 is fixedly connected to the bottom surface of the filter frame 4. The right side of the filter frame 4 is longitudinally slidably connected to the right inner wall of the dust collection box 2. The slide rod 18 slides through the bottom of the dust collection box 2 and the top of the purification box 1 in sequence. A spring 19 is sleeved on the outside of the slide rod 18. The top end of the spring 19 is fixedly connected to the bottom surface of the lifting plate 17, and the bottom end of the spring 19 is fixedly connected to the inner bottom surface of the dust collection box 2.

[0052] The transmission mechanism includes a movable rod 22, the top end of which is rotatably connected to the bottom end of a slide rod 18, and the bottom end of the movable rod 22 is rotatably connected to the top surface of a rack 23. A slide plate 24 is fixedly installed on the top surface of the rack 23, and the top surface of the slide plate 24 is slidably connected to the inner top surface of the purification box 1. The rack 23 is meshed with a transmission gear 25 fixedly installed on the surface of the aeration pipe 13.

[0053] The evaporation and crystallization mechanism includes a tank 26, which is fixedly installed on the left side of the purification box 1. A discharge pipe with a valve is fixedly installed through the center of the bottom of the tank 26. A rotating rod 27 is installed through the center of the top of the tank 26 with a longitudinal bearing. The rotating rod 27 is also installed through the bottom of the housing 28. The housing 28 is fixedly installed on the left side of the dust removal box 2. The left end of the drive rod 14 extends into the interior of the housing 28. A bevel gear set 29 is fixedly installed on the surface of the drive rod 14 and is fixedly connected to the top of the rotating rod 27. An agitator 30 is fixedly installed on the surface of the rotating rod 27 and is located inside the tank 26. An electric heating plate 31 is embedded in the inner wall of the tank 26. A receiving pipe 32 is fixedly installed through the top surface of the tank 26. An agitating scraper 33 is fixedly installed on the lower end of the rotating rod 27 via an installation rod and is in contact with the inner bottom surface of the tank 26.

[0054] The pumping mechanism includes a water pump 34, which is fixedly installed on the left side wall of the purification tank 1. The water inlet of the water pump 34 is fixedly connected to one end of the water pump pipe 35, and one end of the water pump pipe 35 is fixedly connected to the lower end of the left side wall of the purification tank 1. The water outlet of the water pump 34 is fixedly connected to one end of the water supply pipe 36, and the other end of the water supply pipe 36 is fixedly connected to the top of the tank 26.

[0055] The heat conduction mechanism includes a heat conduction frame 37, which is installed on the inner bottom surface of the dust collection box 2. Multiple heat conduction fins 38 are evenly arranged on the top surface of the heat conduction frame 37. A heat conduction strip 39 is fixedly installed on the left side of the heat conduction frame 37. The heat conduction strip 39 passes through the bottom of the dust collection box 2, the top and left side wall of the purification box 1, and the upper end of the right side wall of the tank 26 in sequence. The heat conduction strip 39 is Z-shaped.

[0056] A discharge channel 20 is fixedly and continuously provided on the left side wall of the dust collector 2, and the left end of the filter frame 4 extends into the interior of the discharge channel 20. The width of the filter frame 4 matches the width of the dust collector 2 and the discharge channel 20. The bottom surface of the filter frame 4 is connected to the inner bottom of the discharge channel 20 by an elastic band 21. The discharge end of the discharge channel 20 is provided with an openable cover to prevent exhaust gas from overflowing and to discharge the filtered impurities by opening the cover.

[0057] Working principle: When in use, start the air pump 8 to generate suction, ensuring that the exhaust gas generated by the injection molding machine enters the device through the air inlet pipe 40 at the top of the dust collector 2. The filter frame 4 and its internal filter screen in the dust collector 2 directly intercept the dust particles in the exhaust gas to achieve dust removal.

[0058] After dust removal, the exhaust gas will pass through the extraction pipe 9 and then through the gas transmission pipe 10 to the U-shaped pipe 11 inside the purification box 1. The U-shaped pipe 11 will then transmit the exhaust gas to the aeration pipe 13 through the sealed rotary joint 12. Finally, the exhaust gas will be sprayed out from the aeration port on the aeration pipe 13 and come into full contact with the treatment liquid (such as alkaline liquid, which can neutralize the acidic chemical harmful substances in the exhaust gas, such as sulfides and nitrogen oxides) pre-injected into the purification box 1.

[0059] After being treated by the purification box 1, the exhaust gas enters the deodorization box 3 through the pipe 5 on the right side wall of the purification box 1. The activated carbon plate 6 inside the deodorization box 3 uses physical adsorption to adsorb odor molecules in the exhaust gas. Finally, the exhaust gas is discharged through the exhaust pipe 7 on the right side of the deodorization box 3.

[0060] When the airflow passes through the extraction pipe 9, it will drive the turbofan 15 inside the extraction pipe 9 to rotate, which in turn drives the drive rod 14, which is coaxial with the turbofan 15, to rotate synchronously.

[0061] The cam 16 on the surface of the drive rod 14 rotates eccentrically with the drive rod 14. The cam 16 periodically pushes against the lifting plate 17. Under the action of the pushing force of the cam 16 and the elastic restoring force of the spring 19 on the outside of the slide rod 18, the lifting plate 17 drives the slide rod 18 to move up and down reciprocally. Finally, the filter frame 4 fixed to the top of the slide rod 18 generates high-frequency micro-vibration. During the vibration, the dust attached to the filter screen is shaken off, avoiding filter screen blockage and ensuring dust removal efficiency. The shaken dust is discharged through the discharge channel 20 on the left side of the dust collection box 2. The elastic band 21 between the bottom surface of the filter frame 4 and the inner bottom of the discharge channel 20 can remain sealed, while providing vibration buffer for the filter frame 4.

[0062] When the slide bar 18 moves up and down, its bottom end drives the rack 23 to slide left and right through the movable rod 22. Since the rack 23 meshes with the transmission gear 25 on the surface of the aeration pipe 13, the left and right sliding of the rack 23 is converted into the rotational motion of the transmission gear 25, which in turn drives the aeration pipe 13 to rotate around the sealed rotary joint 12, dynamically adjusting the orientation of the aeration port. The continuous change of the port angle expands the contact range between the waste gas and the treatment liquid, allowing the chemical harmful substances in the waste gas to be more fully contacted by the treatment liquid, thus improving the purification effect.

[0063] By activating the water pump 34 on the left side wall of the purification tank 1, the water pump 34 draws out the treatment liquid that adsorbs harmful chemicals in the purification tank 1 through the water pumping pipe 35, and then transports it to the tank 26 through the water delivery pipe 36.

[0064] While the drive rod 14 rotates, the bevel gear set 29 on its surface converts the horizontal rotation of the drive rod 14 into the vertical rotation of the rotating rod 27. The stirring blades 30 on the surface of the rotating rod 27 rotate with the rotating rod 27 to stir the treatment liquid in the tank 26. At the same time, the electric heating plate 31 on the inner wall of the tank 26 is activated to heat the treatment liquid and accelerate the evaporation of water. During the evaporation process, the pollutants in the treatment liquid gradually crystallize. The stirring scraper 33 at the lower end of the rotating rod 27 rotates with the rotating rod 27 and can scrape off the crystals attached to the bottom surface of the tank 26 to prevent scaling from affecting the heating efficiency. Opening the discharge pipe with a valve at the bottom of the tank 26 can discharge the crystallized pollutants for centralized harmless treatment. The steam generated by evaporation is discharged and collected through the collection pipe 32 on the top surface of the tank 26, which can be subsequently condensed and recovered or further treated to avoid secondary pollution.

[0065] The heat-conducting frame 37 on the bottom surface of the dust collector 2 and the multiple heat-conducting fins 38 on its top surface can efficiently absorb heat from the exhaust gas. The Z-shaped heat-conducting strip 39 on the left side of the heat-conducting frame 37 transfers the absorbed heat to the inside of the tank 26, providing auxiliary heating for the evaporation process of the treatment liquid. This can reduce the energy consumption of the electric heating plate 31, realize the recovery and utilization of waste heat from the exhaust gas, and improve the overall energy efficiency of the device.

[0066] Example 2

[0067] Specifically, such as Figure 10 As shown, the difference between this embodiment and embodiment one is that: a motor 41 is fixedly installed on the left side of the housing 28, and the output shaft bearing of the motor 41 passes through the left side wall of the housing 28. The axis of the output shaft of the motor 41 is collinear with the axis of the drive rod 14, and the shaft end of the motor 41 is magnetically connected to the left end of the drive rod 14.

[0068] With the above design, when the airflow in the extraction pipe 9 is weak and the driving force of the turbofan 15 is insufficient, the motor 41 on the left side of the housing 28 can be started. Since the output shaft of the motor 41 is magnetically connected to the left end of the drive rod 14, the motor 41 directly drives the drive rod 14 to rotate when it is running, ensuring that the device can work normally under different exhaust gas emission levels.

[0069] Example 3

[0070] The difference between this embodiment and Embodiment 1 is that the heat-conducting strip 39 is designed in a spiral shape inside the tank 26 and is sleeved on the outside of the stirring blade 30.

[0071] The above design can significantly increase the contact area between the heat-conducting strip 39 and the treatment liquid inside the tank 26. At the same time, the heat-conducting strip 39 can fully contact the flowing treatment liquid stirred by the stirring blade 30, allowing for more complete heat exchange between the treatment liquid and the heat-conducting strip, thereby improving heat transfer efficiency.

[0072] Example 4

[0073] The difference between this embodiment and Embodiment 1 is that the receiving pipe 32 is connected to the air inlet pipe 40 through a connecting pipe, and a solenoid valve is provided on the connecting pipe.

[0074] With the above design, the gas generated by evaporation can be transported to the air inlet pipe 40 through the connecting pipe for further treatment. At the same time, the solenoid valve is set to close when the injection molding waste gas enters through the air inlet pipe 40 to prevent the injection molding waste gas from entering the tank 26.

[0075] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A purification device for exhaust gas from an injection molding machine, comprising a purification chamber (1), a dust removal chamber (2) disposed on the top of the purification chamber (1), and a deodorization chamber (3) disposed on the right side wall of the purification chamber (1), characterized in that: The purification box (1) is provided with an air supply mechanism connected to the purification box (1). The top of the dust removal box (2) is fixedly provided with an air inlet pipe (40). The dust removal box (2) is movably provided with a filter frame (4) with a filter screen inside. The right side wall of the purification box (1) is fixedly connected with a through pipe (5), and the through pipe (5) is fixedly connected through the left side wall of the deodorizing box (3). The deodorizing box (3) is provided with an activated carbon plate (6), and the right side wall of the deodorizing box (3) is fixedly provided with an exhaust pipe (7). The dust collector (2) is provided with a drive mechanism. The bottom of the drive mechanism is provided with an elastic vibration mechanism for the reciprocating movement of the filter frame (4). The elastic vibration mechanism is connected to the gas supply mechanism through a transmission mechanism. The left end of the drive mechanism is connected to an evaporation crystallization mechanism. The evaporation crystallization mechanism is connected to the purification box (1) through a pump mechanism. The evaporation crystallization mechanism is connected to the dust collector (2) through a heat conduction mechanism.

2. The injection molding machine exhaust gas purification device according to claim 1, characterized in that, The gas supply mechanism includes a vacuum pump (8), which is fixedly installed on the top surface of the purification box (1). The air inlet of the vacuum pump (8) is fixedly connected to the right end of the vacuum pipe (9), and the vacuum pipe (9) is fixedly connected through the lower end of the right side wall of the purification box (1). The air outlet of the vacuum pump (8) is fixedly connected to one end of the gas supply pipe (10), and the gas supply pipe (10) is fixedly connected through the top of the purification box (1). The other end of the gas supply pipe (10) is fixedly connected to the top of the U-shaped pipe (11). The bottom of the front and rear sides of the U-shaped pipe (11) is connected to an aeration pipe (13) through a sealed rotary joint (12). An aeration port is provided on the aeration pipe (13).

3. The injection molding machine exhaust gas purification device according to claim 2, characterized in that, The driving mechanism includes a driving rod (14), which has a transverse bearing that passes through the left side wall of the purification box (1), and the right end of the driving rod (14) extends into the interior of the exhaust pipe (9). The axis of the driving rod (14) is collinear with the axis of the exhaust pipe (9), and a turbo fan (15) is coaxially fixedly installed at the right end of the driving rod (14). The turbo fan (15) is located inside the exhaust pipe (9).

4. The injection molding machine exhaust gas purification device according to claim 3, characterized in that, The elastic vibration mechanism includes a cam (16), which is fixedly installed on the surface of the drive rod (14), and the bottom of the cam (16) is movably abutting against a lifting plate (17). The front and rear ends of the lifting plate (17) are longitudinally fixedly provided with slide rods (18), and the top end of the slide rod (18) is fixedly connected to the bottom surface of the filter frame (4). The right side of the filter frame (4) is longitudinally slidably connected to the right inner wall of the dust collector (2). The slide rod (18) slides through the bottom of the dust collector (2) and the top of the purification box (1) in sequence. A spring (19) is sleeved on the outside of the slide rod (18). The top end of the spring (19) is fixedly connected to the bottom surface of the lifting plate (17), and the bottom end of the spring (19) is fixedly connected to the inner bottom surface of the dust collector (2).

5. The injection molding machine exhaust gas purification device according to claim 4, characterized in that, The transmission mechanism includes a movable rod (22), the top end of which is rotatably connected to the bottom end of a sliding rod (18), and the bottom end of the movable rod (22) is rotatably connected to the top surface of a rack (23). A sliding plate (24) is fixedly installed on the top surface of the rack (23), and the top surface of the sliding plate (24) is slidably connected to the inner top surface of the purification box (1). The rack (23) is meshed with a transmission gear (25) fixedly installed on the surface of the aeration pipe (13).

6. The injection molding machine exhaust gas purification device according to claim 3, characterized in that, The evaporation crystallization mechanism includes a tank (26), which is fixedly installed on the left side of the purification box (1). A discharge pipe with a valve is fixedly installed through the center of the bottom of the tank (26). A rotating rod (27) is installed through the center of the top of the tank (26) with a longitudinal bearing. The rotating rod (27) is also installed through the bottom of the housing (28). The housing (28) is fixedly installed on the left side of the dust collector (2). The left end of the drive rod (14) extends into the interior of the housing (28). A cone is fixedly installed on the surface of the drive rod (14). A bevel gear set (29) is fixedly connected to the top of a rotating rod (27). A stirring blade (30) is fixedly installed on the surface of the rotating rod (27), and the stirring blade (30) is located inside the tank (26). An electric heating plate (31) is embedded in the inner wall of the tank (26), and a receiving pipe (32) is fixedly installed through the top surface of the tank (26). A stirring scraper (33) is fixedly installed at the lower end of the surface of the rotating rod (27) through a mounting rod, and the stirring scraper (33) is in contact with the inner bottom surface of the tank (26).

7. The injection molding machine exhaust gas purification device according to claim 6, characterized in that, The pumping mechanism includes a water pump (34), which is fixedly installed on the left side wall of the purification tank (1). The water inlet of the water pump (34) is fixedly connected to one end of the water pump pipe (35), and one end of the water pump pipe (35) is fixedly connected to the lower end of the left side wall of the purification tank (1). The water outlet of the water pump (34) is fixedly connected to one end of the water supply pipe (36), and the other end of the water supply pipe (36) is fixedly connected to the top of the tank body (26).

8. The injection molding machine exhaust gas purification device according to claim 6, characterized in that, The heat conduction mechanism includes a heat conduction frame (37), which is installed on the inner bottom surface of the dust collection box (2). Multiple heat conduction fins (38) are evenly arranged on the top surface of the heat conduction frame (37). A heat conduction strip (39) is fixedly installed on the left side of the heat conduction frame (37). The heat conduction strip (39) passes through the bottom of the dust collection box (2), the top and left side wall of the purification box (1), and the upper right side wall of the tank (26) in sequence.

9. The injection molding machine exhaust gas purification device according to claim 1, characterized in that, The dust collector (2) has a discharge channel (20) fixedly and continuously provided on the left side wall, and the left end of the filter frame (4) extends into the interior of the discharge channel (20). The width of the filter frame (4) matches the width of the dust collector (2) and the discharge channel (20). The bottom surface of the filter frame (4) is connected to the inner bottom of the discharge channel (20) by an elastic band (21).

10. The injection molding machine exhaust gas purification device according to claim 6, characterized in that, A motor (41) is fixedly installed on the left side of the housing (28), and the output shaft bearing of the motor (41) passes through the left side wall of the housing (28). The axis of the output shaft of the motor (41) is collinear with the axis of the drive rod (14), and the shaft end of the motor (41) is magnetically connected to the left end of the drive rod (14).

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