Gas treatment device for operation waste gas of injection molding machine

Abstract

The invention discloses a gas treatment device for operation waste gas of an injection molding machine, and relates to the technical field of waste gas treatment. A gas treatment device for operation waste gas of an injection molding machine comprises a shell, the shell is provided with a gas inlet cover, the gas inlet cover is communicated with an external gas extraction pipeline, an inner barrel is fixedly connected in the shell, one side, away from the gas inlet cover, of the inner barrel is fixedly connected with a gas exhaust cover, and the gas exhaust cover is communicated with an external gas exhaust pipeline; the mounting disc is fixedly connected to the position, close to the air inlet cover, in the inner barrel, and a plurality of flow dividing holes are formed in the mounting disc; the sliding disc is connected to the position, away from the air inlet cover, in the inner barrel in a sliding mode, and a plurality of exhaust holes are formed in the sliding disc; the activated carbon sponge is mounted between the mounting disc and the sliding disc. The position of the sliding disc is adjusted by detecting the concentration of waste gas, so that the size of pores in the activated carbon sponge is controlled, and the duration of the waste gas flowing through the activated carbon sponge is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a gas treatment device for waste gas from the operation of an injection molding machine. Background Art

[0002] During the operation of the injection molding machine, waste gas will be generated due to the heating and decomposition of raw materials, the use of mold release agents and the influence of additives. The waste gas contains volatile organic compounds (VOCs), non-methane hydrocarbons (NMHCs), halogenated hydrocarbons, sulfides and nitrogen oxides. If the waste gas is allowed to diffuse in the workshop, it will not only pollute the external environment, but also harm the health of workshop workers.

[0003] In order to reduce the harm of injection molding waste gas to the environment and workers, activated carbon is usually used to adsorb harmful components in injection molding waste gas. The existing activated carbon adsorption device is affected by the pores of activated carbon, and its waste gas treatment rate is a constant value. However, injection molding waste gas is affected by the number of injection molded parts and injection molding stations, and the concentration of waste gas will change. This results in that when the waste gas concentration is high, the waste gas cannot fully contact with the activated carbon, that is, the activated carbon has a low adsorption efficiency for harmful components in the waste gas, so that the factory can only add excessive activated carbon to ensure that the concentration of the treated waste gas is below the emission limit, resulting in high production costs. Summary of the invention

[0004] The invention provides a gas treatment device for waste gas from the operation of an injection molding machine, so as to overcome the disadvantage of high cost of existing waste gas treatment.

[0005] The technical solution is: a gas treatment device for waste gas from an injection molding machine, comprising: a shell, the shell being equipped with an air intake hood, the air intake hood being connected to an external exhaust pipe, an inner cylinder being fixedly connected in the shell, an exhaust hood being fixedly connected on a side of the inner cylinder away from the air intake hood, the exhaust hood being connected to an external exhaust pipe; a mounting plate, fixedly connected to a position in the inner cylinder close to the air intake hood, the mounting plate being provided with a plurality of diversion holes; a sliding plate, slidably connected to a position in the inner cylinder away from the air intake hood, the sliding plate being provided with a plurality of exhaust holes; an activated carbon sponge, mounted between the mounting plate and the sliding plate, and used for absorbing harmful components in the waste gas in the inner cylinder; a detection power assembly, mounted in the inner cylinder, and used for detecting the concentration of harmful components in the waste gas entering the inner cylinder, and controlling the size of the pores of the activated carbon sponge by controlling the movement of the sliding plate.

[0006] Furthermore, the detection power assembly includes: a filter plate, fixedly connected to a position in the inner cylinder near the air intake hood, for filtering dust from the exhaust gas entering the air intake hood and dispersing harmful components in the exhaust gas; a sensor, installed on a side of the filter plate away from the air intake hood, for monitoring the concentration of the exhaust gas; an electric push rod, installed in the inner cylinder, a shift block fixedly connected to the telescopic end of the electric push rod, and the shift block is squeezed into fit with the sliding plate.

[0007] Furthermore, a plurality of conical cavities are arranged in the activated carbon sponge to increase the variation range of the resistance encountered by the exhaust gas in the process of passing through the activated carbon sponge.

[0008] Furthermore, a plurality of support rings are slidably connected in the inner cylinder, and the plurality of support rings are all located between the mounting plate and the sliding plate, a first spring is fixedly connected between the mounting plate and the adjacent support ring, a second spring is commonly fixedly connected to the adjacent support rings, and a third spring is installed between the sliding plate and the adjacent support rings; in the direction from the air intake hood to the exhaust hood, the elastic coefficients of the first spring, the second spring and the third spring decrease step by step, so that after the activated carbon sponge is compressed, the pores in the above direction gradually decrease.

[0009] Furthermore, elastic sealing rings are fixedly connected between the mounting plate, the support ring and the sliding plate, and the elastic sealing rings are in contact with the activated carbon sponge to restrict the deformation of the activated carbon sponge. The sliding plate and the plurality of support rings are fixedly connected to a limiting ring on one side close to the air intake hood, and the limiting ring is provided with an annular bevel, which is squeezed and fitted with the adjacent elastic sealing ring.

[0010] Furthermore, the plurality of diversion holes are all communicated with the adjacent elastic sealing rings, and the plurality of exhaust holes are all communicated with the adjacent elastic sealing rings, so as to limit the flow range of the exhaust gas.

[0011] Furthermore, the length of the elastic sealing ring in a free state is equal to the length of the limiting ring.

[0012] Furthermore, it also includes: a plurality of locking components, respectively installed on adjacent support rings, for controlling the order of resetting the support rings and the sliding disk, the locking components including: a limiting column, fixedly connected to a side of an adjacent support ring close to the air inlet hood or a side of an adjacent sliding disk close to the air inlet hood, the limiting column being provided with a plurality of evenly distributed one-way grooves; a limiting block, slidably connected in an adjacent support ring, the limiting block being limitedly matched with an adjacent one-way groove, a spring being fixedly connected between the limiting block and the adjacent support ring; a traction rope, fixedly connected to a side of an adjacent support ring away from the air inlet hood or a side of an adjacent mounting disk away from the air inlet hood, an end thereof away from the air inlet hood being fixedly connected to an adjacent limiting block.

[0013] Furthermore, a support hole is provided on the support ring, and the diameter of the support hole is smaller than the diameter of the corresponding position of the activated carbon sponge, that is, the activated carbon sponge is embedded in the support hole, and a traction hole is provided on the sliding plate, and the activated carbon sponge passes through the traction hole, and the diameter of the activated carbon sponge on both sides of the traction hole is larger than the diameter of the traction hole.

[0014] Furthermore, a replacement groove is provided on the sliding plate near the electric push rod, the shift block is located in the replacement groove, and a limiting groove is provided on the sliding plate, and the limiting groove cooperates with the third spring in a limiting manner.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: the present invention detects the concentration of exhaust gas to adjust the position of the sliding disk, thereby controlling the size of the pores in the activated carbon sponge, and then controlling the length of time the exhaust gas flows through the activated carbon sponge, ultimately achieving the purpose of matching the exhaust gas concentration with the treatment rate, while eliminating the need to use excessive activated carbon, thereby reducing production costs.

[0016] By controlling the compactness of each part of the activated carbon sponge, the saturation level of each part of the activated carbon sponge can be made consistent, thereby extending the interval between replacing the activated carbon sponge.

[0017] The elastic sealing ring is used to constrain the circumferential deformation of the activated carbon sponge to ensure the internal compactness of the activated carbon sponge when it is compressed, thereby ensuring the exhaust gas treatment efficiency of the activated carbon sponge.

[0018] By controlling the resetting order of each part of the activated carbon sponge, when the exhaust gas concentration decreases, the high-concentration exhaust gas remaining in the activated carbon sponge can be fully treated to ensure the treatment quality of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2It is a three-dimensional structural cross-sectional view of the housing and the air intake cover of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the inner cylinder, exhaust cover and filter disc of the present invention; Figure 4 It is a three-dimensional structural cross-sectional view of the mounting plate, the support ring and the sliding plate of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the elastic sealing ring and the limiting ring of the present invention; Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle; Figure 7 It is a schematic diagram of the three-dimensional structure of the support ring, the limiting column and the traction rope of the present invention; Figure 8 For the present invention Figure 7 The enlarged view of point B in the middle; Fig. 9 It is a three-dimensional structural schematic diagram of the sliding plate, the shifting block and the third spring of the present invention.

[0020] Wherein: 1- shell, 2- air inlet cover, 3- inner cylinder, 4- exhaust cover, 5- filter plate, 6- sensor, 7- mounting plate, 701- diverter hole, 8- support ring, 801- support hole, 9- sliding plate, 901- traction hole, 902- exhaust hole, 10- activated carbon sponge, 101- conical cavity, 11- electric push rod, 111- dial block, 12- first spring, 13- second spring, 14- third spring, 15- elastic sealing ring, 16- limiting ring, 161- annular slope, 17- limiting column, 171- one-way groove, 18- limiting block, 19- traction rope, 20- replacement groove, 21- limiting groove. DETAILED DESCRIPTION

[0021] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0022] It is worth noting that the following description will be given using the viewing angle in the accompanying drawings as an example.

[0023] A gas treatment device for waste gas from injection molding machine operation, see Figure 1-Figure 4, including: a shell 1, the shell 1 is equipped with an air intake hood 2, the air intake hood 2 is connected to an external exhaust pipe, an inner cylinder 3 is fixedly connected to the shell 1, an exhaust hood 4 is fixedly connected to the side of the inner cylinder 3 away from the air intake hood 2, and the exhaust hood 4 is connected to an external exhaust pipe; a mounting plate 7 is fixedly connected to a position in the inner cylinder 3 close to the air intake hood 2, and a plurality of diversion holes 701 are arranged on the mounting plate 7; a sliding plate 9 is slidably connected to a position in the inner cylinder 3 away from the air intake hood 2, and a plurality of exhaust holes 902 are arranged on the sliding plate 9; an activated carbon sponge 10 is installed between the mounting plate 7 and the sliding plate 9, and is used to absorb harmful components in the exhaust gas in the inner cylinder 3; a detection power component is installed in the inner cylinder 3, and is used to detect the concentration of harmful components in the exhaust gas entering the inner cylinder 3, and control the size of the pores of the activated carbon sponge 10 by controlling the movement of the sliding plate 9.

[0024] In the above scheme, it is intended to solve the problem that when activated carbon is used to adsorb harmful components in exhaust gas, the concentration of harmful components in exhaust gas (hereinafter referred to as exhaust gas concentration) does not match the processing rate of activated carbon for exhaust gas (i.e., the speed of exhaust gas passing through activated carbon); since the time required for exhaust gas to pass through activated carbon is constant, when the exhaust gas concentration is high, the exhaust gas cannot fully contact with activated carbon, that is, the adsorption efficiency of activated carbon for harmful components in exhaust gas is low; the external exhaust pipe is used to collect the exhaust gas generated during the injection molding process; the aperture of the diversion hole 701 is moderate, which can reduce The low mounting plate 7 blocks the aperture of the activated carbon sponge 10, and on the other hand, enables the mounting plate 7 to provide lateral support for the activated carbon sponge 10; the exhaust hole 902 is the same as the above-mentioned diversion hole 701; the inner cylinder 3 and the exhaust hood 4 can be connected by bolts or threads, etc.; the position of the sliding plate 9 is adjusted by detecting the concentration of the exhaust gas, and then the distance between the sliding plate 9 and the mounting plate 7 is changed, so as to control the size of the pores in the activated carbon sponge 10, and then control the length of time that the exhaust gas flows through the activated carbon sponge 10, and finally achieve the purpose of different treatment rates corresponding to exhaust gases of different concentrations.

[0025] See also Figure 3 and Figure 4 The detection power assembly includes: a filter plate 5, which is fixedly connected to a position in the inner cylinder 3 near the air intake hood 2, and is used to filter the exhaust gas entering the air intake hood 2 and disperse the harmful components in the exhaust gas; a sensor 6, which is installed on a side of the filter plate 5 away from the air intake hood 2, and is used to monitor the concentration of the exhaust gas; an electric push rod 11, which is installed in the inner cylinder 3, and a shift block 111 is fixedly connected to the telescopic end of the electric push rod 11, and the shift block 111 is squeezed and matched with the sliding plate 9.

[0026] In the above scheme, the purpose is to adjust the size of the pores of the activated carbon sponge 10 by detecting the exhaust gas concentration; the electric push rods 11 can be two symmetrically distributed to improve the stability of the electric push rods 11 when driving the sliding disk 9 to move, and the number of subsequent dial blocks 111 is increased synchronously; the sensor 6 can be any instrument such as a VOCs monitoring sensor and a PID photoionization sensor that can monitor harmful components in injection molding exhaust gas; the activated carbon sponge 10 is set to an extreme relaxation state at the initial time, and the exhaust gas concentration that can be treated at this time is the initial concentration; according to the detection result of the sensor 6, the telescopic end of the electric push rod 11 is controlled to retract, and when the exhaust gas concentration is greater than the initial concentration, the telescopic end of the electric push rod 11 is contracted, and the sliding disk 9 is squeezed to the left by the dial block 111, and the sliding The distance between the disk 9 and the mounting disk 7 is reduced, and the activated carbon sponge 10 is compressed to reduce the length of the activated carbon sponge 10 and the pore size therein. The resistance encountered by the exhaust gas in the process of passing through the activated carbon sponge 10 is increased, and the harmful components in the exhaust gas can have sufficient time to contact with the activated carbon sponge 10, thereby increasing the adsorption efficiency of the activated carbon sponge 10 for the harmful components; when the exhaust gas concentration is lower than the initial concentration, the telescopic end of the electric push rod 11 is extended and reset, and the sliding disk 9 is moved right and reset under the elastic force of the activated carbon sponge 10 itself. At this time, the pore size in the activated carbon sponge 10 is reset, and the exhaust gas encounters little resistance in the process of passing through the activated carbon sponge 10. The activated carbon sponge 10 can allow the exhaust gas to pass quickly while completing the adsorption of the harmful components, thereby improving the treatment efficiency of the exhaust gas.

[0027] See also Figure 4 A plurality of conical cavities 101 are provided in the activated carbon sponge 10 to increase the range of variation of the resistance encountered by the exhaust gas when passing through the activated carbon sponge 10 .

[0028] In the above scheme, the purpose is to achieve the purpose of increasing the range of variation of the resistance encountered by the exhaust gas in the process of passing through the activated carbon sponge 10; the shape of the conical cavity 101 can be a shuttle shape, an oblate sphere, etc., so that when the activated carbon sponge 10 is squeezed, the corresponding two side surfaces of the conical cavity 101 can contact each other; when the activated carbon sponge 10 is squeezed, the length of the conical cavity 101 in the left and right directions is reduced, that is, the two corresponding conical side surfaces of the conical cavity 101 gradually contact from the circumference to the middle. When the two corresponding side surfaces on the conical cavity 101 contact, the effective space available for the passage of the exhaust gas is reduced due to the contact state, forcing the exhaust gas to follow a more tortuous and complex path, thereby increasing the flow resistance of the exhaust gas in the process of passing through the activated carbon sponge 10. On the basis of the increase in the resistance of the exhaust gas when the activated carbon sponge 10 is squeezed and the exhaust gas passes through, the resistance to the exhaust gas is increased again, thereby increasing the range of variation of the resistance encountered by the exhaust gas in the process of passing through the activated carbon sponge 10, and improving the adaptability of the activated carbon sponge 10 to exhaust gases of different concentrations.

[0029] See also Figure 3 and Figure 4 A plurality of support rings 8 are slidably connected in the inner cylinder 3, and the plurality of support rings 8 are all located between the mounting plate 7 and the sliding plate 9. A first spring 12 is fixedly connected between the mounting plate 7 and the adjacent support ring 8, and a second spring 13 is commonly fixedly connected to the adjacent support rings 8. A third spring 14 is installed between the sliding plate 9 and the adjacent support ring 8. In the direction from the air intake hood 2 to the exhaust hood 4, the elastic coefficients of the first spring 12, the second spring 13 and the third spring 14 decrease step by step, so that after the activated carbon sponge 10 is compressed, the pores in the above direction gradually decrease.

[0030] In the above scheme, the purpose of achieving synchronous change of saturation degree of various parts of activated carbon sponge 10 by changing spring elastic coefficient is to extend the interval time of replacing activated carbon sponge 10; the elastic coefficient of first spring 12, second spring 13 and third spring 14 can be realized by wire diameter, material, surface treatment, etc., and when the first spring 12 is compressed by two unit lengths, the adjacent second spring 13 is compressed by one unit length at the same time, and the compression of the remaining second spring 13 and third spring 14 is similar; the first spring 12, second spring 13 and third spring 14 are all in the storage state at the beginning; the number of support rings 8 and the active carbon sponge 10 are the same. The length of the carbon sponge 10 is related. If the number of support rings 8 is N, the N support rings 8 divide the activated carbon sponge 10 into N+1 parts, which are used to drive the activated carbon sponge 10 to move synchronously when the support rings 8 move, so that the compression amounts of each part of the activated carbon sponge 10 after being divided are different, so that the compression amount of the activated carbon sponge 10 gradually increases from left to right, that is, the pores in the activated carbon sponge 10 gradually decrease from left to right, which adapts to the situation that the exhaust gas concentration gradually decreases from left to right, so that the saturation degree of each part on the activated carbon sponge 10 tends to be consistent, thereby extending the interval time for replacing the activated carbon sponge 10.

[0031] See also Figure 5 and Figure 6 Elastic sealing rings 15 are fixedly connected between the mounting plate 7, the support ring 8 and the sliding plate 9. The elastic sealing ring 15 is in contact with the activated carbon sponge 10 to restrict the deformation of the activated carbon sponge 10. The sliding plate 9 and the multiple support rings 8 are fixedly connected to a limiting ring 16 on one side close to the air intake hood 2. The limiting ring 16 is provided with an annular inclined surface 161, which is squeezed and matched with the adjacent elastic sealing ring 15.

[0032] See also Figure 5 and Figure 6 The plurality of diversion holes 701 are all connected to the adjacent elastic sealing rings 15, and the plurality of exhaust holes 902 are all connected to the adjacent elastic sealing rings 15, so as to limit the flow range of the exhaust gas.

[0033] See also Figure 5 and Figure 6The length of the elastic sealing ring 15 in a free state is equal to the length of the limiting ring 16 , which prevents the elastic sealing ring 15 from wrinkling and assists the limiting ring 16 in constraining the activated carbon sponge 10 .

[0034] In the above scheme, the elastic sealing ring 15 is used to limit the deformation of the activated carbon sponge 10 in the circumferential direction when it is compressed, so as to limit the large-scale expansion of the activated carbon sponge 10 in the circumferential direction, thereby ensuring the size of the pores of the activated carbon sponge 10 after it is compressed; the maximum diameter of the circle tangent to the diversion hole 701 and concentric with the mounting plate 7 is smaller than the inner diameter of the elastic sealing ring 15; the elastic sealing ring 15 can be made of polyvinyl chloride and thermoplastic polyurethane, which can restrain the activated carbon sponge 10 and is airtight; when the sliding plate 9 moves to the left, the activated carbon sponge 10 is squeezed and has a tendency to increase in diameter, and at this time the elastic sealing ring 15 The activated carbon sponge 10 is initially constrained in the circumferential direction by its own elasticity (since the elastic sealing ring 15 itself has elasticity, the elastic sealing ring 15 can only provide flexible constraints on the activated carbon sponge 10). At the same time, the sliding disk 9 drives the adjacent limiting ring 16 to move. The limiting ring 16 squeezes the adjacent elastic sealing ring 15 through the annular inclined surface 161 thereon. By squeezing the adjacent elastic sealing ring 15, the diameter of the activated carbon sponge 10 squeezed by the elastic sealing ring 15 is restored to a normal state. The limiting ring 16 is used to provide a hard constraint for the activated carbon sponge 10, thereby further ensuring the size of the pores of the activated carbon sponge 10.

[0035] See also Figure 7 and Figure 8 , also includes: a plurality of locking components, respectively installed on adjacent support rings 8, for controlling the order of resetting the support rings 8 and the sliding disk 9, the locking components include: a limiting column 17, fixedly connected to the side of the adjacent support ring 8 close to the air intake hood 2 or the side of the adjacent sliding disk 9 close to the air intake hood 2, the limiting column 17 is provided with a plurality of uniformly distributed one-way grooves 171; a limiting block 18, slidably connected in the adjacent support ring 8, the limiting block 18 and the adjacent one-way groove 171 are limitedly matched, and a spring is fixedly connected between the limiting block 18 and the adjacent support ring 8; a traction rope 19, fixedly connected to the side of the adjacent support ring 8 away from the air intake hood 2 or the side of the adjacent mounting disk 7 away from the air intake hood 2, and its end away from the air intake hood 2 is fixedly connected to the adjacent limiting block 18.

[0036] In the above scheme, the purpose is to achieve the purpose of resetting the activated carbon sponge 10 from left to right in sequence when resetting, so as to adapt to the treatment effect of residual high-concentration exhaust gas in the activated carbon sponge 10 when the exhaust gas concentration is reduced; the spring between the limit block 18 and the adjacent support ring 8 is initially in a stored force state, the traction rope 19 is initially in a taut state, the leftmost support ring 8 is not fixedly connected to the limit column 17, and the rightmost support ring 8 is not fixedly connected to the traction rope 19; when it is detected that the exhaust gas concentration is greater than the initial concentration, the telescopic end of the electric push rod 11 contracts and drives the sliding disk 9 to move left through the dial block 111, the sliding disk 9 drives the adjacent support ring 8 to move left through the third spring 14, and the support ring 8 squeezes the adjacent support ring 8 on its left side to move left through the adjacent second spring 13, and finally the leftmost support ring 8 moves left and presses The first spring 12 is compressed. During the leftward movement of the sliding disk 9, the sliding disk 9 drives the adjacent limiting column 17 to move left. At the same time, with the movement of the rightmost support ring 8, the distance between the two adjacent support rings 8 on the rightmost side is reduced, that is, the traction rope 19 on the rightmost side becomes relaxed, and the limiting block 18 on the rightmost side moves downward under the action of the adjacent spring and enters the adjacent one-way groove 171. As the distance between the sliding disk 9 and the leftmost adjacent support ring 8 continues to decrease, the limiting block 18 on the rightmost side moves back and forth up and down under the action of the adjacent one-way groove 171. Until the sliding disk 9 finally stops moving, the limiting block 18 cooperates with the adjacent one-way groove 171 to lock the distance between the sliding disk 9 and the adjacent support ring 8, and the subsequent movement steps of the limiting column 17 on the support ring 8 are the same.

[0037] When it is detected that the exhaust gas concentration is reduced, the telescopic end of the electric push rod 11 is controlled to extend outward by a specified distance (the specified distance here is calculated based on the difference between the exhaust gas concentrations before and after), and the telescopic end of the electric push rod 11 drives the shift block 111 to lose contact with the sliding disk 9. At this time, the first spring 12, the second spring 13 and the third spring 14 are all in the accumulation state. The first spring 12 first pushes the leftmost support ring 8 to the right to reset. During this process, the leftmost traction rope 19 gradually changes from a relaxed state to a tight state. When the leftmost support ring 8 is reset, the traction rope 19 pulls the leftmost limit block 18 to move up and reset, so that the limit block 18 is released from the adjacent one-way groove 171, and then the limit of the upper limit column 17 on the second support ring 8 on the left is released, so that the second support ring 8 on the left repeats the above steps to reset, and the remaining support rings 8 and sliding disks 9 repeat the above steps from left to right to reset, so that the activated carbon sponge 10 is gradually reset in the direction from left to right to complete the treatment of the remaining high-concentration exhaust gas in the activated carbon sponge 10.

[0038] See also Figure 7A support hole 801 is provided on the support ring 8, and the diameter of the support hole 801 is smaller than the diameter of the corresponding position of the activated carbon sponge 10, that is, the activated carbon sponge 10 is embedded in the support hole 801, and a traction hole 901 is provided on the sliding plate 9. The activated carbon sponge 10 passes through the traction hole 901, and the diameters of the activated carbon sponges 10 on both sides of the traction hole 901 are larger than the diameter of the traction hole 901. The sliding plate 9 pulls the activated carbon sponge 10 through the traction hole 901 to reset.

[0039] In the above scheme, the purpose is to achieve the support ring 8 driving the activated carbon sponge 10 to move, and the sliding plate 9 pushing the activated carbon sponge 10 to move; the traction hole 901 can assist in driving the activated carbon sponge 10 to move rightward and reset.

[0040] See also Fig. 9 A replacement groove 20 is provided on the sliding plate 9 near the electric push rod 11 , and the shift block 111 is located in the replacement groove 20 . A limiting groove 21 is provided on the sliding plate 9 , and the limiting groove 21 cooperates with the third spring 14 in a limiting manner.

[0041] In the above scheme, the purpose is to facilitate the replacement of the activated carbon sponge 10 through the design of the limiting groove 21; the third spring 14 is initially in a power storage state, and is used to limit the position of the sliding disk 9 together with the limiting groove 21 to prevent the sliding disk 9 from rotating; when the activated carbon sponge 10 needs to be replaced, the exhaust hood 4 is removed by a tool, and the telescopic end of the electric push rod 11 is controlled to extend so that the telescopic end of the electric push rod 11 protrudes out of the inner cylinder 3, and the sliding disk 9 is rotated at this time, and the sliding disk 9 twists the third spring through the limiting groove 21. 14, so that the replacement groove 20 corresponds to the shift block 111, and at this time, the sliding plate 9 is pulled to the right to make the limiting groove 21 lose contact with the third spring 14. At the same time, the sliding plate 9 drives the activated carbon sponge 10 to move right through the traction hole 901, and the activated carbon sponge 10 is taken out, and then a new activated carbon sponge 10 is inserted into the inner cylinder 3, and the activated carbon sponge 10 is embedded in all the supporting holes 801, and then the right part of the activated carbon sponge 10 is embedded in the traction hole 901, and the sliding plate 9 is reset, thus completing the replacement of the activated carbon sponge 10.

[0042] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present application, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of this application.

Claims

1. A gas treatment device for waste gas from injection molding machine operation, characterized in that: include: A shell (1), the shell (1) being provided with an air intake hood (2), the air intake hood (2) being connected to an external air extraction pipeline, an inner cylinder (3) being fixedly connected inside the shell (1), an exhaust hood (4) being fixedly connected to a side of the inner cylinder (3) away from the air intake hood (2), the exhaust hood (4) being connected to an external exhaust pipeline; A mounting plate (7) fixedly connected to a position in the inner cylinder (3) close to the air inlet cover (2), wherein a plurality of flow diversion holes (701) are provided on the mounting plate (7); A sliding plate (9) slidably connected to a position in the inner cylinder (3) away from the air inlet cover (2), wherein the sliding plate (9) is provided with a plurality of exhaust holes (902); An activated carbon sponge (10) is installed between the installation plate (7) and the sliding plate (9) and is used to absorb harmful components in the exhaust gas in the inner cylinder (3); A detection power assembly is installed in the inner cylinder (3) and is used to detect the concentration of harmful components in the exhaust gas entering the inner cylinder (3), and to control the size of the pores of the activated carbon sponge (10) by controlling the movement of the sliding disk (9).

2. A gas treatment device for waste gas from an injection molding machine according to claim 1, characterized in that: The detection power assembly comprises: A filter disc (5) is fixedly connected to a position in the inner cylinder (3) close to the air intake hood (2), and is used to filter dust from the exhaust gas entering the air intake hood (2) and disperse harmful components in the exhaust gas; A sensor (6) is mounted on a side of the filter disc (5) away from the air intake hood (2) and is used to monitor the concentration of the exhaust gas; An electric push rod (11) is installed in the inner cylinder (3); a shift block (111) is fixedly connected to the telescopic end of the electric push rod (11); the shift block (111) is pressed and matched with the sliding disk (9).

3. A gas treatment device for waste gas from injection molding machine operation according to claim 1, characterized in that: A plurality of conical cavities (101) are arranged in the activated carbon sponge (10) for increasing the range of variation of resistance encountered by exhaust gas during the process of passing through the activated carbon sponge (10).

4. A gas treatment device for waste gas from an injection molding machine according to claim 2, characterized in that: A plurality of support rings (8) are slidably connected in the inner cylinder (3), the plurality of support rings (8) are all located between the mounting plate (7) and the sliding plate (9), a first spring (12) is fixedly connected between the mounting plate (7) and the adjacent support ring (8), a second spring (13) is commonly fixedly connected to the adjacent support rings (8), and a third spring (14) is installed between the sliding plate (9) and the adjacent support ring (8); In the direction from the air intake hood (2) to the exhaust hood (4), the elastic coefficients of the first spring (12), the second spring (13) and the third spring (14) are gradually reduced, so that after the activated carbon sponge (10) is compressed, the pores in the above direction are gradually reduced.

5. A gas treatment device for waste gas from injection molding machine operation according to claim 4, characterized in that: Elastic sealing rings (15) are fixedly connected between each of the mounting plate (7), the support ring (8) and the sliding plate (9); the elastic sealing ring (15) is in contact with the activated carbon sponge (10) and is used to restrict the deformation of the activated carbon sponge (10); the sliding plate (9) and the plurality of support rings (8) are fixedly connected to a limiting ring (16) on one side close to the air intake hood (2); the limiting ring (16) is provided with an annular inclined surface (161); the annular inclined surface (161) is pressed and fitted with an adjacent elastic sealing ring (15).

6. A gas treatment device for waste gas from injection molding machine operation according to claim 5, characterized in that: The plurality of diversion holes (701) are all in communication with the adjacent elastic sealing ring (15), and the plurality of exhaust holes (902) are all in communication with the adjacent elastic sealing ring (15), so as to limit the flow range of the exhaust gas.

7. A gas treatment device for waste gas from injection molding machine operation according to claim 5, characterized in that: The length of the elastic sealing ring (15) in a free state is equal to the length of the limiting ring (16).

8. The gas treatment device for waste gas from injection molding machine operation according to claim 5, characterized in that: Also includes: A plurality of locking assemblies are respectively mounted on adjacent support rings (8) and are used to control the order in which the support rings (8) and the sliding disks (9) are reset. The locking assemblies include: A limiting column (17) is fixedly connected to a side of the adjacent support ring (8) close to the air inlet cover (2) or a side of the adjacent sliding plate (9) close to the air inlet cover (2), and the limiting column (17) is provided with a plurality of uniformly distributed one-way grooves (171); a limit block (18) slidably connected in the adjacent support ring (8), the limit block (18) being in position-limiting cooperation with the adjacent one-way groove (171), and a spring being fixedly connected between the limit block (18) and the adjacent support ring (8); The traction rope (19) is fixedly connected to a side of the adjacent support ring (8) away from the air intake cover (2) or a side of the adjacent mounting plate (7) away from the air intake cover (2), and one end of the traction rope (19) away from the air intake cover (2) is fixedly connected to the adjacent limit block (18).

9. A gas treatment device for waste gas from an injection molding machine according to claim 8, characterized in that: The support ring (8) is provided with a support hole (801), the diameter of the support hole (801) being smaller than the diameter of a corresponding position of the activated carbon sponge (10), that is, the activated carbon sponge (10) is embedded in the support hole (801), the sliding plate (9) is provided with a traction hole (901), the activated carbon sponge (10) passes through the traction hole (901), and the diameter of the activated carbon sponge (10) on both sides of the traction hole (901) is larger than the diameter of the traction hole (901).

10. A gas treatment device for waste gas from an injection molding machine according to claim 9, characterized in that: A replacement groove (20) is provided on the sliding plate (9) near the electric push rod (11), the shift block (111) is located in the replacement groove (20), and a limiting groove (21) is provided on the sliding plate (9), the limiting groove (21) being in limiting cooperation with the third spring (14).

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