CN214214414U

CN214214414U - Pulverizer for recycling polystyrene

Info

Publication number: CN214214414U
Application number: CN202120028085.XU
Authority: CN
Inventors: 窦振辉; 韩旭; 刘同威
Original assignee: Tianjin Geyade New Material Technology Co ltd
Current assignee: Tianjin Geyade New Material Technology Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-09-17
Anticipated expiration: 2031-01-06

Abstract

The utility model provides a retrieve polystyrene's rubbing crusher belongs to rubbing crusher technical field. The pulverizer for recycling polystyrene comprises a pulverizing mechanism and a circulating grinding mechanism. Rubbing crusher constructs including quick-witted case, mount, crushing pair roller and feeder hopper, smash the pair roller rotate connect in under the feeder hopper discharge gate quick-witted incasement wall, the second grinding roller rotate connect in quick-witted incasement wall, first grinding roller rotate connect in the flexible end tip of pneumatic cylinder, the feed end of spiral elevator bottom communicate in quick-witted lateral wall bottom, the discharge end at spiral elevator top communicate in quick-witted lateral wall top, the utility model discloses a smash the pair roller and carry out preliminary precomminution to the EPS waste material, realized grinding the control of back crushing granule size through the pneumatic cylinder, realized the many times grinding of EPS waste material through spiral elevator, improved crushing effect and efficiency.

Description

Pulverizer for recycling polystyrene

Technical Field

The utility model relates to a rubbing crusher field particularly, relates to a retrieve polystyrene's rubbing crusher.

Background

Polystyrene foam (EPS) is one of the most widely used plastics in the world today, because it has good water resistance, heat insulation, insulativity, low hygroscopicity and strong shock strength, and its characteristics such as light weight, firmness, easy molding and low price, it is widely used in the fields of packaging, heat preservation, water resistance, heat insulation, shock absorption, decoration, catering industry, etc., and this kind of disposable use of EPS is a great waste of resources, because EPS foam plate is not easy to degrade by itself after being abandoned, and causes great pollution to the environment, therefore, the development of recovery, regeneration and regeneration of EPS also becomes the most urgent problem of the current EPS packaging industry, and the EPS recovery treatment mainly includes crushing recovery, hot melt recovery and chemical recovery at present.

The existing pulverizer for recycling polystyrene only has a grinding function, can not preliminarily pre-grind EPS waste materials, can not fully grind the EPS waste materials with larger volume, has poor grinding effect and lower grinding efficiency, can not control the particle size of ground materials by a common grinder, has low practicability, and has uneven ground particles after grinding, unadjustable ground particles and poor safety and reliability.

SUMMERY OF THE UTILITY MODEL

In order to make up for the above insufficiency, the utility model provides a retrieve rubbing crusher of polystyrene aims at improving the problem that proposes in the above-mentioned background art.

The utility model discloses a realize like this:

the utility model provides a retrieve polystyrene's rubbing crusher, grind the mechanism including rubbing crusher structure and circulation.

Crushing mechanism includes quick-witted case, mount, crushing pair roller and feeder hopper, bottom of the case portion fixed joint in the mount, the feeder hopper bottom communicate in machine roof portion, smash the pair roller rotate connect in under the feeder hopper discharge gate machine incasement wall, bottom of the case portion intercommunication has the discharging pipe.

The circulating grinding mechanism comprises a first grinding roller, a second grinding roller, a hydraulic cylinder, a screen and a spiral elevator, the first grinding roller and the second grinding roller are horizontally and symmetrically arranged under the crushing pair rollers, the second grinding roller is rotationally connected with the inner wall of the case, the hydraulic cylinder is fixedly connected with the outer wall of the case through a tripod, the telescopic end of the hydraulic cylinder penetrates through the side wall of the case and extends to the inside, the first grinding roller is rotationally connected with the end part of the telescopic end of the hydraulic cylinder, the screen is obliquely arranged under the first grinding roller and the second grinding roller, both ends of the screen are elastically connected with the inner wall of the case, the spiral elevator is fixedly connected with the outer wall of one side of the case far away from the hydraulic cylinder, and the feeding end of the bottom of the spiral elevator is communicated with the bottom of the side wall of the case, and the discharge end at the top of the spiral elevator is communicated with the top of the side wall of the case.

The utility model discloses an in the embodiment, be provided with the dust remover on the machine case lateral wall, the dust remover includes bag-type dust removal case, dust absorption pipe and dust absorption fan, the bag-type dust removal case pass through fixation clamp fixed connection in machine case lateral wall top, dust absorption pipe one end communicate in bag-type dust removal roof portion, the dust absorption pipe other end communicate in machine case top portion, the dust absorption fan is installed on the dust absorption pipe.

In an embodiment of the present invention, the second grinding roller is configured to be in transmission connection with an external driving member, the first grinding roller and the circumferential side of the second grinding roller are uniformly provided with trapezoidal tooth arrays, the first grinding roller and the second grinding roller rotate in opposite directions, and the trapezoidal tooth arrays thereon are engaged with each other.

The utility model discloses an in the embodiment, screw elevator includes servo motor and screw feeder, servo motor install in the screw feeder top, servo motor output transmission connect in screw feeder, the discharge end at screw feeder top pass through the back flow communicate in quick-witted lateral wall top.

The utility model discloses an in one embodiment, machine side wall bottom set up with the opening of the feed end adaptation of screw feeder bottom, machine side wall top set up with the through-hole of back flow adaptation.

The utility model discloses an in the embodiment, the screen cloth top is fixed with the connecting block, vibrating motor is installed at the connecting block top, the connecting block is close to one side of machine incasement side is fixed with the slider, set up on the machine incasement side wall with the spout of slider adaptation.

The utility model discloses an in one embodiment, the connecting block with the bottom of screen cloth bottom all is fixed with first spring, first spring bottom all through fixed plate fixed connection in quick-witted incasement wall.

In an embodiment of the present invention, the fixing frame includes a fixed ring sleeve, a supporting column and shock absorbing legs, the supporting column is fixedly connected to four corners of the bottom of the fixed ring sleeve, and the shock absorbing legs are fixed to the bottom of the supporting column.

The utility model discloses an in one embodiment, the shock attenuation stabilizer blade includes first backup pad, protecting crust, spacing flexible pipe, second spring and second backup pad, first backup pad fixed connection in the support column bottom, spacing flexible pipe symmetry sets up two, spacing flexible pipe with the second spring is all fixed first backup pad with between the second backup pad, just the second spring is located two between the spacing flexible pipe, the protecting crust parcel is in first backup pad with periphery side between the second backup pad, second backup pad lower surface still is equipped with the shock pad.

In an embodiment of the present invention, a material containing box is disposed under the discharging pipe, a handle is fixed on the front surface of the material containing box, and universal wheels are disposed at four corners of the bottom of the material containing box.

The utility model has the advantages that: the utility model discloses a rubbing crusher of retrieving polystyrene that above-mentioned design obtained, during the use, the EPS waste material passes through the feeder hopper and gets into quick-witted incasement, it rotates to drive crushing pair roller through the external drive piece, carry out preliminary pre-crushing to the EPS waste material that falls into between the crushing pair roller, reduce the particle size of EPS waste material, be convenient for follow-up grinding to it, improve crushing efficiency, grind the EPS waste material through preliminary pre-crushing through first grinding roller and second grinding roller and roll the grinding, control about driving first grinding roller through the flexible end of pneumatic cylinder, thereby adjust the clearance between first grinding roller and the second grinding roller, realized the control of grinding back crushing grain size, the crushing grain of the EPS waste material after the grinding falls on the screen cloth and screens, fall to the chassis bottom portion and discharge through the discharging pipe with the crushing grain sieve that the particle size meets the condition, the crushing grain that will persist on the screen cloth advances once more between first grinding roller and the second grinding roller through screw elevator And grinding is carried out, so that the EPS waste is ground for many times, and the quality of a ground finished product is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a pulverizer for recycling polystyrene according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a crushing mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a shock absorption foot according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a circulating grinding mechanism according to an embodiment of the present invention;

fig. 5 is an enlarged schematic structural diagram of a portion a in fig. 4 according to an embodiment of the present invention.

In the figure: 10-a crushing mechanism; 110-a chassis; 111-opening; 112-a through hole; 113-a chute; 120-a fixed mount; 121-fixed ring sleeve; 122-support column; 123-shock absorbing legs; 1231 — a first support plate; 1232-a protective shell; 1233-limit telescopic tube; 1234-a second spring; 1235-a second support plate; 1236-shock pad; 130-crushing pair rollers; 140-a feed hopper; 150-a dust remover; 151-bag type dust removal box; 152-a dust suction pipe; 153-dust collection fan; 154-a retaining clip; 160-a discharge pipe; 170-material containing box; 171-a handle; 172-universal wheels; 20-a circulating grinding mechanism; 210-a first grinding roller; 220-a second grinding roller; 230-a hydraulic cylinder; 231-tripod; 240-screen mesh; 241-a first spring; 242 — a fixed plate; 250-a screw elevator; 251-a servo motor; 252-a screw feeder; 253-a return conduit; 260-a vibration motor; 270-connecting block; 271-slide block.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-5, the present invention provides a technical solution: a pulverizer for recycling polystyrene comprises a pulverizing mechanism 10 and a circulating grinding mechanism 20.

Referring to fig. 2, the crushing mechanism 10 includes a case 110, a fixing frame 120, crushing rollers 130 and a feeding hopper 140, the bottom of the case 110 is fixedly clamped in the fixing frame 120, the case 110 and the fixing frame 120 are fixed by welding or bolts, the bottom of the feeding hopper 140 is connected to the top of the case 110, the bottom of the feeding hopper 140 is located right above the crushing rollers 130 so as to ensure that all the EPS waste material falls into the space between the crushing rollers 130, the crushing rollers 130 are rotatably connected to the inner wall of the case 110 right below the discharge port of the feeding hopper 140, the crushing rollers 130 are driven by an external driving member, the external driving member drives the crushing rollers 130 to rotate, preliminary pre-crushing is performed on the EPS waste material falling into the space between the crushing rollers 130 from the feeding hopper 140, the particle size of the EPS waste material is reduced, subsequent grinding of the EPS waste material is facilitated, the crushing efficiency is improved, the bottom of the case 110 is communicated with a discharge pipe 160, a material containing box 170 is arranged right below the discharge pipe 160, be convenient for concentrate the crushing granule after the collection grinding, flourishing workbin 170 front is fixed with handle 171, and flourishing workbin 170 bottom four corners is provided with universal wheel 172, through the setting of handle 171 and universal wheel 172, is convenient for promote flourishing workbin 170 and carries out the transportation of crushing granule.

In some specific embodiments, the dust collector 150 is disposed on a sidewall of the chassis 110 to prevent dust from leaking and affecting a working environment, specifically, the dust collector 150 includes a bag-type dust collection box 151, a dust collection pipe 152 and a dust collection fan 153, the bag-type dust collection box 151 is fixedly connected to a top of a sidewall of the chassis 110 by a fixing clip 154, one end of the dust collection pipe 152 is communicated with a top of the bag-type dust collection box 151, the other end of the dust collection pipe 152 is communicated with a top of the chassis 110, the dust collection fan 153 is mounted on the dust collection pipe 152, the dust collection fan 153 sucks dust into the dust collection pipe 152, and the dust is conveyed into the bag-type dust collection box 151 through the dust collection pipe 152 to be filtered and collected.

Referring to fig. 2 and 3, the fixing frame 120 includes a fixing ring sleeve 121, a supporting column 122 and shock absorbing legs 123, the supporting column 122 is fixedly connected to four corners of the bottom of the fixing ring sleeve 121, the supporting column 122 and the fixing ring sleeve 121 are fixed by bolts or welding, the shock absorbing legs 123 are fixed to the bottom end of the supporting column 122, specifically, the shock absorbing legs 123 include a first supporting plate 1231, a protective shell 1232, two limit telescopic tubes 1233, a second spring 1234 and a second supporting plate 1235, the first supporting plate 1231 is fixedly connected to the bottom end of the supporting column 122, the limit telescopic tubes 1233 are symmetrically arranged in two numbers, the limit telescopic tubes 1233 and the second spring 1234 are both fixed between the first supporting plate 1231 and the second supporting plate 1235, the second spring 1234 is located between the two limit telescopic tubes 1233, the limit telescopic tubes 1233 play a limiting role to prevent the second spring 1234 from deflecting to cause unstable support, the protective shell 1232 wraps the outer peripheral side between the first supporting plate 1231 and the second supporting plate 1235, the subassembly protects in it, and second backup pad 1235 lower surface still is equipped with shock pad 1236, absorbs the shaking force of rubbing crusher during operation through second spring 1234 and shock pad 1236 buffering, can reduce the impact force that vibrations brought for the whole even running of rubbing crusher reduces the noise, can do benefit to the life who prolongs rubbing crusher simultaneously.

Referring to fig. 4 and 5, the circulating grinding mechanism 20 includes a first grinding roller 210, a second grinding roller 220, a hydraulic cylinder 230, a screen 240 and a spiral elevator 250, the first grinding roller 210 and the second grinding roller 220 are horizontally and symmetrically disposed under the crushing pair roller 130, the second grinding roller 220 is rotatably connected to the inner wall of the housing 110, the second grinding roller 220 is configured to be in transmission connection with an external driving member, trapezoidal tooth arrays are uniformly disposed on the peripheral sides of the first grinding roller 210 and the second grinding roller 220, the first grinding roller 210 and the second grinding roller 220 rotate in opposite directions, and the trapezoidal tooth arrays thereon are engaged with each other, by such arrangement, the first grinding roller 210 and the second grinding roller 220 rotate in opposite directions under the driving of the external driving member, the trapezoidal teeth on the first grinding roller 210 and the second grinding roller 220 are attached to each other and then separated with the rotation, and when the attachment is performed, the EPS waste material subjected to preliminary pre-crushing is pressed for grinding, when the EPS waste materials are separated, the crushed particles of the EPS waste materials fall off from the first grinding roller 210 and the second grinding roller 220, the hydraulic cylinder 230 is fixedly connected to the outer side wall of the case 110 through the triangular frame 231, the telescopic end of the hydraulic cylinder 230 penetrates through the side wall of the case 110 and extends to the inside, the first grinding roller 210 is rotatably connected to the end part of the telescopic end of the hydraulic cylinder 230, the first grinding roller 210 is driven to move left and right through the telescopic end of the hydraulic cylinder 230, so that the gap between the first grinding roller 210 and the second grinding roller 220 is adjusted, and the size of the crushed particles after grinding is controlled.

In this embodiment, the screen 240 is obliquely disposed under the first grinding roller 210 and the second grinding roller 220, and both ends of the screen 240 are elastically connected to the inner wall of the case 110, a connection block 270 is fixed to the top end of the screen 240, a first spring 241 is fixed to the bottom of the connection block 270 and the bottom end of the screen 240, the bottom end of the first spring 241 is fixedly connected to the inner side wall of the case 110 through a fixing plate 242, a vibration motor 260 is installed at the top of the connection block 270, a sliding block 271 is fixed to one side of the connection block 270 close to the inner side of the case 110, a sliding groove 113 adapted to the sliding block 271 is formed in the inner side wall of the case 110, the screen 240 is vibrated by the vibration motor 260, the crushed particles meeting the conditions are screened to the bottom of the case 110 and discharged through a discharging pipe 160, and the crushed particles remaining on the screen 240 are discharged into the spiral elevator 250 through the opening 111.

In this embodiment, the screw elevator 250 is fixedly connected to the outer wall of the side of the chassis 110 away from the hydraulic cylinder 230, the feeding end of the bottom of the screw elevator 250 is communicated with the bottom of the side wall of the chassis 110, the discharging end of the top of the screw elevator 250 is communicated with the top of the side wall of the chassis 110, the screw elevator 250 includes a servo motor 251 and a screw feeder 252, the servo motor 251 is installed at the top of the screw feeder 252, the output end of the servo motor 251 is connected to the screw feeder 252 in a transmission manner, the bottom of the side wall of the chassis 110 is provided with an opening 111 adapted to the feeding end of the bottom of the screw feeder 252, the discharging end of the top of the screw feeder 252 is communicated with the top of the side wall of the chassis 110 through a return pipe 253, when the pulverized particles of the ground EPS waste fall on the screen 240, the pulverized particles with the particle size meeting the condition are screened to the bottom of the chassis 110, meanwhile, the crushed particles stored on the case 110 are sent to the feeding end at the bottom of the screw feeder 252 through the opening 111, and are lifted by the screw feeder 252 and then conveyed to the space between the first grinding roller 210 and the second grinding roller 220 again through the return pipe 253 and the guide plate below the return pipe 253 to be ground again, so that the EPS waste is ground for multiple times, and the quality of a ground finished product is improved.

Specifically, the working principle of the pulverizer for recycling polystyrene is as follows: when in use, EPS waste enters the case 110 through the feed hopper 140, the crushing double rollers 130 are driven to rotate by the external driving part, the EPS waste falling between the crushing double rollers 130 is preliminarily pre-crushed, the particle size of the EPS waste is reduced, the subsequent grinding of the EPS waste is facilitated, the crushing efficiency is improved, the first grinding roller 210 and the second grinding roller 220 are driven to rotate in opposite directions by the external driving part, trapezoidal teeth on the first grinding roller 210 and the second grinding roller 220 are mutually attached along with the rotation and then separated, the EPS waste subjected to preliminary pre-crushing is pressed in during the attachment and is ground, the crushed particles of the EPS waste fall off from the first grinding roller 210 and the second grinding roller 220 during the separation, the first grinding roller 210 is driven to move left and right by the telescopic end of the hydraulic cylinder 230, so that the gap between the first grinding roller 210 and the second grinding roller 220 is adjusted, and the control of the size of the crushed particles after grinding is realized, the crushing granule of the EPS waste material after grinding falls on screen cloth 240, through vibrating motor 260 vibration screen cloth 240, the crushing granule sieve that accords with the condition with the particle size falls to quick-witted case 110 bottom and discharges through discharging pipe 160 and falls into containing case 170, will persist the feed end of the crushing granule in opening 111 screw feeder 252 bottom on screen cloth 240, servo motor 251 drives screw feeder 252 and carries it after promoting again through back flow 253 and grind once more between first grinding roller 210 and the second grinding roller 220, realize the many times of grinding of EPS waste material, thereby the off-the-shelf quality after the grinding has been improved, filter the collection dirt to the dust that pre-crushing and grinding process produced through dust remover 150, avoid the dust leakage, influence operational environment.

It should be noted that the specific model specifications of the dust collection fan 153, the hydraulic cylinder 230, the servo motor 251 and the vibration motor 260 need to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed burdens are not needed.

The power supply of the suction fan 153, the hydraulic cylinder 230, the servo motor 251 and the vibration motor 260 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulverizer for recycling polystyrene is characterized by comprising

The crushing mechanism (10) comprises a case (110), a fixing frame (120), crushing roller pairs (130) and a feed hopper (140), the bottom of the case (110) is fixedly clamped in the fixing frame (120), the bottom end of the feed hopper (140) is communicated with the top of the case (110), the crushing roller pairs (130) are rotatably connected to the inner wall of the case (110) right below a discharge port of the feed hopper (140), and the bottom of the case (110) is communicated with a discharge pipe (160);

the circulating grinding mechanism (20) comprises a first grinding roller (210), a second grinding roller (220), a hydraulic cylinder (230), a screen (240) and a spiral elevator (250), wherein the first grinding roller (210) and the second grinding roller (220) are horizontally and symmetrically arranged under the crushing roller pair (130), the second grinding roller (220) is rotatably connected to the inner wall of the case (110), the hydraulic cylinder (230) is fixedly connected to the outer side wall of the case (110) through a tripod (231), the telescopic end of the hydraulic cylinder (230) penetrates through the side wall of the case (110) and extends to the inside, the first grinding roller (210) is rotatably connected to the end part of the telescopic end of the hydraulic cylinder (230), the screen (240) is obliquely arranged under the first grinding roller (210) and the second grinding roller (220), and two ends of the screen (240) are elastically connected to the inner wall of the case (110), the spiral elevator (250) is fixedly connected to the outer wall of one side, far away from the hydraulic cylinder (230), of the case (110), the feeding end of the bottom of the spiral elevator (250) is communicated with the bottom of the side wall of the case (110), and the discharging end of the top of the spiral elevator (250) is communicated with the top of the side wall of the case (110).

2. The pulverizer for recycling polystyrene according to claim 1, wherein a dust collector (150) is disposed on a sidewall of the machine box (110), the dust collector (150) comprises a bag-type dust collection box (151), a dust collection pipe (152) and a dust collection fan (153), the bag-type dust collection box (151) is fixedly connected to a top of the sidewall of the machine box (110) through a fixing clip (154), one end of the dust collection pipe (152) is communicated with the top of the bag-type dust collection box (151), the other end of the dust collection pipe (152) is communicated with the top of the machine box (110), and the dust collection fan (153) is installed on the dust collection pipe (152).

3. The pulverizer for recycling polystyrene according to claim 1, wherein the second grinding roller (220) is configured to be drivingly connected to an external driving member, the peripheral side surfaces of the first grinding roller (210) and the second grinding roller (220) are uniformly provided with trapezoidal tooth arrays, the first grinding roller (210) and the second grinding roller (220) rotate in opposite directions, and the trapezoidal tooth arrays thereon are engaged with each other.

4. The pulverizer for recycling polystyrene as claimed in claim 1, wherein the screw elevator (250) comprises a servo motor (251) and a screw feeder (252), the servo motor (251) is installed on the top of the screw feeder (252), the output end of the servo motor (251) is in transmission connection with the screw feeder (252), and the discharge end of the top of the screw feeder (252) is communicated with the top of the side wall of the cabinet (110) through a return pipe (253).

5. The pulverizer for recycling polystyrene as claimed in claim 4, wherein the bottom of the side wall of the case (110) is provided with an opening (111) adapted to the feeding end of the bottom of the screw feeder (252), and the top of the side wall of the case (110) is provided with a through hole (112) adapted to the return pipe (253).

6. The pulverizer for recycling polystyrene according to claim 1, wherein a connecting block (270) is fixed at the top end of the screen (240), a vibration motor (260) is installed at the top of the connecting block (270), a sliding block (271) is fixed at one side of the connecting block (270) close to the inner side of the case (110), and a sliding groove (113) matched with the sliding block (271) is formed in the inner side wall of the case (110).

7. The pulverizer for recycling polystyrene according to claim 6, wherein the bottom of the connecting block (270) and the bottom of the bottom end of the screen (240) are fixed with first springs (241), and the bottom ends of the first springs (241) are fixedly connected to the inner side wall of the cabinet (110) through fixing plates (242).

8. The pulverizer for recycling polystyrene according to claim 1, wherein the fixing frame (120) comprises a fixing collar (121), supporting columns (122) and shock-absorbing legs (123), the supporting columns (122) are fixedly connected to four corners of the bottom of the fixing collar (121), and the shock-absorbing legs (123) are fixed to the bottom ends of the supporting columns (122).

9. The pulverizer for recycling polystyrene according to claim 8, the shock absorption support leg (123) comprises a first support plate (1231), a protective shell (1232), a limiting telescopic pipe (1233), a second spring (1234) and a second support plate (1235), the first supporting plate (1231) is fixedly connected to the bottom end of the supporting column (122), the two limiting telescopic pipes (1233) are symmetrically arranged, the limit telescopic pipe (1233) and the second spring (1234) are both fixed between the first supporting plate (1231) and the second supporting plate (1235), and the second spring (1234) is positioned between the two limit telescopic pipes (1233), the protective shell (1232) is wrapped on the outer peripheral side between the first supporting plate (1231) and the second supporting plate (1235), and a damping pad (1236) is further arranged on the lower surface of the second supporting plate (1235).

10. The pulverizer for recycling polystyrene as claimed in claim 1, wherein a material containing box (170) is arranged under the material discharging pipe (160), a handle (171) is fixed on the front surface of the material containing box (170), and universal wheels (172) are arranged at four corners of the bottom of the material containing box (170).