CN114101049A

CN114101049A - Anti-erosion wear-resistant plastic screening device

Info

Publication number: CN114101049A
Application number: CN202210082732.4A
Authority: CN
Inventors: 王娟; 王江伟; 李琰; 任芳; 王江波; 王秀福
Original assignee: Henan Zhongnai Gaoke Furnace Lining Material Co ltd
Current assignee: Henan Zhongnai Gaoke Furnace Lining Material Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-03-01
Anticipated expiration: 2042-01-25
Also published as: CN114101049B

Abstract

The invention discloses an anti-erosion wear-resistant plastic screening device, and relates to the technical field of plastic screening. This anti wear-resisting plastic sieving mechanism that corrodes includes the screening installation, slidable mounting has the screening board on the inner wall of screening installation, the screening board is through shell fragment and screening installation elastic connection No. one. This wear-resisting plastic sieving mechanism of anti erosion, can drive the rotor plate through rotating the axis of rotation and rotate, rotate through the rotor plate and can drive the fixed plate and control the removal, make the plastic that the slurcam can promote on the screening board remove, can promote the plastic to remove to the left side, the plastic that can't filter removes to the left side, the plastic that avoids unable screening piles up the effect that influences the screening on the screening board, the horizontal pole can promote the lagging and rotate, avoid the slurcam to promote the plastic and remove the rightmost side of screening board, influence the plastic and break away from the screening board.

Description

Anti-erosion wear-resistant plastic screening device

Technical Field

The invention relates to the technical field of plastic screening, in particular to an anti-erosion wear-resistant plastic screening device.

Background

The plastic material is one kind of unshaped refractory material, which is compounded with granular and powder material in 70-80 wt% and binding agent such as plastic clay in 10-25 wt% and proper amount of plasticizer, and through mixing with binding agent such as plastic clay and plasticizer, small amount of water is added to form the unshaped refractory material in hard paste form and maintaining high plasticity for long period.

Because plastic material's variation in size needs filter plastic material, and plastic material's granule can pile up and can't filter on the filter during screening, makes the unmatched plastic material of size can pile up the filtration screening effect that influences the filter on the filter.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an anti-erosion wear-resistant plastic screening device, which solves the problems in the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the anti-erosion wear-resistant plastic screening device comprises screening equipment, wherein a screening plate is slidably mounted on the inner wall of the screening equipment and is elastically connected with the screening equipment through a first elastic sheet, a supporting plate is fixedly mounted on the right side of the screening equipment, the supporting plate is penetrated through by a rotating shaft and is rotatably sleeved on the supporting plate, a rotating plate is fixedly mounted at the bottom of the rotating shaft, a rotating block is rotatably mounted at the bottom of the rotating plate, a pull rod is slidably sleeved on the right side of the screening equipment, a connecting plate is fixedly mounted on the right side of the pull rod and is fixed with one end of a connecting rod, the other end of the connecting rod is hinged with the rotating block, a fixed plate is fixedly mounted on the left side of the pull rod, a sleeve plate is rotatably mounted at the bottom of the fixed plate, a push plate is slidably sleeved at the bottom of the sleeve plate, a baffle is fixedly mounted on the right side of the fixed plate, the fixed plate is elastically connected with the sleeve plate through a second elastic sheet.

Preferably, the right side of lagging is articulated with the one end of horizontal pole, the other end slidable mounting of horizontal pole is at the pull rod, the slurcam is through the inner wall elastic connection of No. three shell fragments with the lagging, the screening board is provided with two, and two screening boards pass through support fixed connection, the inner wall left side of screening installation is rotated and is installed out the flitch, it passes through No. six shell fragments and screening board elastic connection to go out the flitch.

Preferably, screening apparatus's right side fixed mounting has elastic airbag, the air jet that runs through is seted up on screening apparatus's right side, rotate on elastic airbag's the inner wall and install the jet-propelled pipe, jet-propelled pipe and air jet intercommunication, fixed mounting has an arc on elastic airbag's the inner wall, the top fixed mounting of an arc has the arc push pedal, the triangle-shaped recess has been seted up in the left side of arc push pedal.

Preferably, the left side fixed mounting of connecting plate has the slide bar, the articulated loop bar in left side of slide bar, the movable rod has been cup jointed in the top slip of loop bar, the top of movable rod articulates in the bottom of screening board, fixed mounting has elastic telescopic rod on the inner wall of loop bar, fixed mounting has the fixed block on elastic telescopic rod's the free end, rotate on the outer wall of fixed block and install the gyro wheel.

Preferably, the left side of an arc plate is rotated and is installed the catch bar, and catch bar and an arc plate are fixed with No. four shell fragment both ends respectively, fixed mounting has the lockplate on the inner wall of elasticity gasbag, the right side fixed mounting of lockplate has the slider, the right side fixed mounting of slider has the elasticity piece.

Preferably, fixed mounting has a piston on the outer wall of slurcam, a piston slidable mounting has on the inner wall of lagging, the gas outlet has been seted up in the left side of lagging, the right side fixed mounting of gas outlet has flexible pipe, the fixed slot has been seted up at the top of slurcam, flexible pipe and fixed slot intercommunication.

Preferably, the left side of the third elastic sheet is fixedly provided with a second arc-shaped plate, the bottom of the second arc-shaped plate is fixedly provided with a convex block, the inner wall of the fixed groove is slidably provided with a second piston, and the top of the second piston is fixedly provided with a transmission rod.

Preferably, the transmission rod is elastically connected with the pushing plate through a fifth elastic sheet, the top of the transmission rod is in contact with the projection, the top of the pushing plate is provided with an air inlet groove, and the air inlet groove is communicated with the fixing groove.

(III) advantageous effects

The invention provides an anti-erosion wear-resistant plastic screening device. The method has the following beneficial effects:

(1) this anti wear-resisting plastic sieving mechanism that corrodes, can drive the rotor plate through rotating the axis of rotation and rotate, rotate through the rotor plate and to drive the fixed plate and control the removal, make the plastic that the slurcam can promote on the screening board remove, can promote the plastic to remove to the left side, the plastic that can't filter removes to the left side, the plastic that avoids unable screening piles up the effect that influences the screening on the screening board, the horizontal pole can promote the lagging and rotate, avoid the slurcam to promote the plastic and remove the rightmost side of screening board, influence the plastic and break away from the screening board.

(2) This wear-resisting plastic sieving mechanism of anti erosion, can extrude elastic airbag when the connecting plate removes, elastic airbag can clear up the screening board from jet-propelled pipe spun gas, can accelerate the effect of screening board screening, can also avoid plastic to block up the screening efficiency that the screening board influences plastic material, elastic airbag can promote an arc and arc push pedal when being extruded and remove, make the triangle-shaped recess in the arc push pedal can change the jet-propelled direction of jet-propelled pipe, the clearance effect of exhaust gas to the screening board has been improved.

(3) This wear-resisting plastic sieving mechanism of anti erosion, the connecting plate removes and to promote the slide bar and remove, the loop bar can promote the screening board through the movable rod and remove, the fixed block can promote the movable rod rebound, when the dynamics that promotes the movable rod rebound at the fixed block reached certain size, the gyro wheel can remove on the movable rod, the promotion movable rod that makes the fixed block can not stop removes, the screening board can shake from top to bottom, thereby can improve the efficiency that the screening board screened.

(4) This anti wear-resisting plastic sieving mechanism that corrodes, can promote the catch bar when an arc removes and move on slider and elastic block, the elastic block limits the catch bar and moves, when catch bar thrust is greater than the elasticity of elastic block, the catch bar can move, make the catch bar can intermittent type nature remove, it spouts gas to make jet-propelled pipe carry out intermittent type nature, make a large amount of gas of blowout in the jet-propelled pipe short time, the slide bar is intermittent type nature removal simultaneously also, the screening effect that makes the screening board is better, further avoided the screening board to be blockked up by plastic.

(5) When the screening plate pushes the pushing plate to move, the erosion-resistant wear-resistant plastic screening device, the pushing plate can push the first piston to move, the first piston can push the gas in the sleeve plate to be sprayed out from the gas outlet, the gas sprayed out from the gas outlet can push the plastic material to move, can blow the plastic material that can't filter and break away from with the screening board, the efficiency that the screening board was screened can further be accelerated to gas outlet spun gas, the deformation of No. three shell fragments can promote No. two arcs and remove, No. two pistons can block the gaseous blowout from the gas outlet of lagging inside, lug on No. two arcs can promote No. two pistons and remove, make the gaseous blowout from the gas outlet that can only intermittent type nature of lagging inside, can increase the gaseous dynamics of blowout in the gas outlet short time equally, improve the gaseous dynamics of gas outlet blowout, the effect that the plastic material removed is blown to the gas outlet has further been improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the overall internal structure of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the internal structure of the loop bar of the present invention;

FIG. 5 is a schematic view of the internal structure of the elastic airbag of the present invention;

FIG. 6 is a schematic view of the internal structure of the loop bar of the present invention;

FIG. 7 is an enlarged view of the portion B of FIG. 6 according to the present invention.

In the figure: 1. screening equipment; 2. screening the plate; 31. a support plate; 32. a rotating shaft; 33. a rotating plate; 34. rotating the block; 35. a connecting rod; 36. a connecting plate; 37. a pull rod; 38. a fixing plate; 39. sheathing; 310. a baffle plate; 311. a push plate; 312. a cross bar; 41. an elastic air bag; 42. a first arc plate; 43. an arc-shaped push plate; 44. a gas ejector tube; 51. a slide bar; 52. a loop bar; 53. a movable rod; 54. an elastic telescopic rod; 55. a fixed block; 56. a roller; 61. a push rod; 62. a locking plate; 63. a slider; 64. an elastic block; 71. a piston I; 72. an air outlet; 73. a telescopic pipe; 81. a piston II; 82. a transmission rod; 83. a second arc plate; 84. a bump; 85. an air inlet groove; 9. and a discharging plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: the anti-erosion wear-resistant plastic screening device comprises a screening device 1, a screening plate 2 is slidably mounted on the inner wall of the screening device 1, the top of the screening plate 2 is arc-shaped, the screening plate 2 is elastically connected with the screening device 1 through a spring plate, a supporting plate 31 is fixedly mounted on the right side of the screening device 1, the supporting plate 31 is penetrated through by a rotating shaft 32, the rotating shaft 32 is rotatably sleeved on the supporting plate 31, a rotating plate 33 is fixedly mounted at the bottom of the rotating shaft 32, a rotating block 34 is rotatably mounted at the bottom of the rotating plate 33, the right side of the screening device 1 is slidably sleeved on a pull rod 37, a connecting plate 36 is fixedly mounted on the right side of the pull rod 37, the connecting plate 36 is fixed with one end of a connecting rod 35, the other end of the connecting rod 35 is hinged with the rotating block 34, a fixing plate 38 is fixedly mounted on the left side of the pull rod 37, a sleeve plate 39 is rotatably mounted at the bottom of the fixing plate 38, a pushing plate 311 is slidably sleeved at the bottom of the sleeve plate 39, the right side of the fixed plate 38 is fixedly provided with a baffle 310, the fixed plate 38 is elastically connected with the sleeve plate 39 through a second elastic sheet, the right side of the sleeve plate 39 is hinged with one end of a cross rod 312, the other end of the cross rod 312 is slidably arranged on a pull rod 37, a push plate 311 is elastically connected with the inner wall of the sleeve plate 39 through a third elastic sheet, two filter plates 2 are arranged, the two filter plates 2 are fixedly connected through a bracket, the left side of the inner wall of the filter device 1 is rotatably provided with a discharge plate 9, the discharge plate 9 is elastically connected with the filter plates 2 through a sixth elastic sheet, the rotating shaft 32 can be rotated to drive the rotating plate 33 to rotate, the rotating plate 33 can drive the rotating block 34 to move, the connecting plate 36 and the pull rod 37 can be driven to move through the rotating block 34, the pull rod 37 can drive the fixed plate 38 and the push plate 311 to move, the baffle 310 can perform one-way limiting on the sleeve plate 39, the push plate 311 can push the plastic materials which cannot be screened on the filter plates 2 to move to the left side, avoid the plastic material of unable screening to pile up the effect that influences the screening on screening board 2, horizontal pole 312 can promote lagging 39 and rotate, avoids the slurcam 311 to promote plastic material and removes the rightmost side of screening board 2, influences the effect that plastic material breaks away from screening board 2.

The right side fixed mounting of screening installation 1 has elasticity gasbag 41, the air jet that runs through is seted up on the right side of screening installation 1, the inside of air jet is provided with the filter screen, rotate on the inner wall of elasticity gasbag 41 and install jet-propelled pipe 44, jet-propelled pipe 44 and air jet intercommunication, jet-propelled pipe 44 is through seven shell fragments and elasticity gasbag 41's inner wall elastic connection, fixed mounting has an arc 42 on the inner wall of elasticity gasbag 41, the top fixed mounting of an arc 42 has arc push pedal 43, the left side of arc push pedal 43 is seted up triangular groove, when connecting plate 36 is compressed by elasticity gasbag 41, the gas in elasticity gasbag 41 can be spout from jet-propelled pipe 44, the effect of screening 2 screening can be accelerated, can also avoid plastic to block up screening plate 2 and influence the screening efficiency of plastic, the deformation that elasticity gasbag 41 produced can promote an arc 42 and move, no. one arc 42 can promote arc push plate 43 and remove, and the triangle-shaped recess on arc push plate 43 can close gas-blast pipe 44 spun direction, has improved the clearance effect of exhaust gas to screening plate 2.

A sliding rod 51 is fixedly installed on the left side of the connecting plate 36, a sleeve rod 52 is hinged on the left side of the sliding rod 51, a movable rod 53 is sleeved on the top of the sleeve rod 52 in a sliding manner, the top of the movable rod 53 is hinged on the bottom of the screening plate 2, an elastic telescopic rod 54 is fixedly installed on the inner wall of the sleeve rod 52, a fixed block 55 is fixedly installed on the free end of the elastic telescopic rod 54, a roller 56 is rotatably installed on the outer wall of the fixed block 55, the connecting plate 36 can be moved to push the sliding rod 51 to move, the sleeve rod 52 can push the screening plate 2 to move through the movable rod 53, the fixed block 55 can push the movable rod 53 to move upwards, when the dynamics that fixed block 55 promoted movable rod 53 rebound reached certain size, gyro wheel 56 can move on movable rod 53, makes the promotion movable rod 53 that fixed block 55 can not stop move, and screening plate 2 can shake from top to bottom to can improve the efficiency of screening plate 2 screening.

The pushing rod 61 is rotatably installed on the left side of the first arc plate 42, the pushing rod 61 and the first arc plate 42 are respectively fixed with two ends of a fourth elastic sheet, the locking plate 62 is fixedly installed on the inner wall of the elastic air bag 41, the sliding block 63 is fixedly installed on the right side of the locking plate 62, the elastic block 64 is fixedly installed on the right side of the sliding block 63, the first arc plate 42 can drive the pushing rod 61 to move, the pushing rod 61 can move on the sliding block 63 and the elastic block 64, the elastic block 64 can limit the pushing rod 61 to move, when the pushing force of the pushing rod 61 is larger than the elastic force of the elastic block 64, the pushing rod 61 can move, the elastic air bag 41 can be limited to deform by intermittent movement of the pushing rod 61, the air injection pipe 44 can perform intermittent air injection, a large amount of air can be injected by the air injection pipe 44 in a short time, meanwhile, the sliding rod 51 also moves intermittently, and the screening effect of the screening plate 2 is better, further avoiding the clogging of the screening plate 2 by plastic material.

A first piston 71 is fixedly arranged on the outer wall of a pushing plate 311, the first piston 71 is slidably arranged on the inner wall of a sleeve plate 39, an air outlet 72 is formed in the left side of the sleeve plate 39, an extension pipe 73 is fixedly arranged on the right side of the air outlet 72, a fixing groove is formed in the top of the pushing plate 311, the extension pipe 73 is communicated with the fixing groove, a second arc-shaped plate 83 is fixedly arranged on the left side of a third elastic sheet, a lug 84 is fixedly arranged at the bottom of the second arc-shaped plate 83, a second piston 81 is slidably arranged on the inner wall of the fixing groove, a transmission rod 82 is fixedly arranged at the top of the second piston 81, the transmission rod 82 is elastically connected with the pushing plate 311 through a fifth elastic sheet, the top of the transmission rod 82 is contacted with the lug 84, an air inlet groove 85 is formed in the top of the pushing plate 311, the air inlet groove 85 is communicated with the fixing groove, filter screens are arranged on the air outlet 72 and the air nozzle, when the sleeve plate 39 moves, the pushing plate 311 can be pushed by the screening plate 2 to move up and down, pushing plate 311 can drive a piston 71 and reciprocate, piston 71 can promote the inside gaseous blowout from gas outlet 72 of lagging 39, gas outlet 72 spun is gaseous can promote plastic and remove, can blow the plastic that can't filter and break away from with screening plate 2, pushing plate 311 can promote No. three shell fragments to deform when removing, No. three shell fragments can promote No. two arc plates 83 and remove, No. two piston 81 can block the inside gaseous blowout from gas outlet 72 of lagging 39, lug 84 on No. two arc plates 83 can promote No. two piston 81 and remove, make the inside gaseous blowout from gas outlet 72 of lagging 39 that can only intermittent type nature, can increase the gaseous volume of gas outlet 72 short time blowout equally, improve the gaseous dynamics of gas outlet 72 blowout, the effect that plastic removed is blown to gas outlet 72 has further improved.

When the plastic material screening device works (or is used), when plastic material needs to be screened, the plastic material is added from the top of the screening device 1, the plastic material falls on the screening plate 2, the rotating shaft 32 is rotated, the rotating shaft 32 can drive the rotating plate 33 and the rotating block 34 to rotate, the rotating block 34 rotates to drive the connecting plate 36 to move left and right through the transmission of the connecting rod 35, the connecting plate 36 moves left and right to drive the pull rod 37 to move left and right, the pull rod 37 drives the fixed plate 38, the sleeve plate 39 and the pushing plate 311 to move left, the baffle 310 can limit the sleeve plate 39, the pushing plate 311 can push the plastic material which cannot be screened on the screening plate 2 to move left, the plastic material which cannot be screened can move to the discharging plate 9 to discharge the screening device 1, when the pushing plate 311 moves, the screening plate 2 can push the pushing plate 311 to move to the inside of the sleeve plate 39, when the pushing plate 311 moves upwards, the first piston 71 can be driven to move upwards, the first piston 71 can extrude gas in the sleeve plate 39, when the pushing plate 311 moves upwards, the third elastic sheet can extrude, deformation generated by the third elastic sheet can drive the second arc-shaped plate 83 to move, the bump 84 on the second arc-shaped plate 83 can push the transmission rod 82 and the second piston 81 to move, when the second piston 81 moves, gas in the sleeve plate 39 can enter the fixed groove from the air inlet groove 85, so that gas in the sleeve plate 39 can be sprayed out from the air outlet 72 through the telescopic pipe 73, when the fixed plate 38, the sleeve plate 39 and the pushing plate 311 move to the right side, when the cross rod 312 contacts with the screening device 1, the cross rod 312 can push the sleeve plate 39 and the pushing plate 311 to rotate clockwise, so that the pushing plate 311 cannot push plastic materials to move to the right side, and when the connecting plate 36 moves, the slide rod 51 can be driven to move, the sliding rod 51 can drive the loop bar 52 to move when moving, the fixed block 55 in the loop bar 52 can push the movable rod 53, the movable rod 53 can push the screening plate 2 to move up and down, the roller 56 can move on the movable rod 53 when the loop bar 52 can push the force greater than that of the elastic telescopic rod 54, so that the fixed block 55 can continuously push the movable rod 53, the fixed block 55 can drive the screening plate 2 to shake up and down through the movable rod 53, the connecting plate 36 can extrude the elastic airbag 41 when moving, so that the gas in the elastic airbag 41 can be ejected from the gas ejector 44 and the gas ejector, the deformation generated by the elastic airbag 41 can drive the first arc-shaped plate 42 to move, the first arc-shaped plate 42 can drive the arc-shaped push plate 43 to move, the triangular groove on the arc-shaped push plate 43 can push the gas ejector 44 to rotate, the first arc-shaped plate 42 can drive the push rod 61 to move, the push rod 61 can move on the sliding block 63 and the elastic block 64, the elastic block 64 can limit the push rod 61 to move, when the pushing force of the push rod 61 is greater than that of the elastic block 64, the push rod 61 moves to enable the push rod 61 to intermittently move, and the connecting plate 36 can intermittently push the elastic air bag 41.

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

Claims

1. The utility model provides an anti wear-resisting plastic sieving mechanism that corrodes, includes screening installation (1), its characterized in that: the screening device is characterized in that the screening plate (2) is slidably mounted on the inner wall of the screening device (1), the screening plate (2) is elastically connected with the screening device (1) through a first elastic sheet, a supporting plate (31) is fixedly mounted on the right side of the screening device (1), the supporting plate (31) is penetrated through by a rotating shaft (32), the rotating shaft (32) is rotatably sleeved on the supporting plate (31), a rotating plate (33) is fixedly mounted at the bottom of the rotating shaft (32), a rotating block (34) is rotatably mounted at the bottom of the rotating plate (33), the right side of the screening device (1) is slidably sleeved on a pull rod (37), a connecting plate (36) is fixedly mounted on the right side of the pull rod (37), the connecting plate (36) is fixed with one end of a connecting rod (35), the other end of the connecting rod (35) is hinged to the rotating block (34), a fixing plate (38) is fixedly mounted on the left side of the pull rod (37), the bottom of fixed plate (38) rotates installs lagging (39), the bottom of lagging (39) slides and has cup jointed slurcam (311), the right side fixed mounting of fixed plate (38) has baffle (310), fixed plate (38) are through No. two shell fragment and lagging (39) elastic connection.

2. The plastic screening device of claim 1, wherein the plastic screening device comprises: the right side of lagging (39) is articulated with the one end of horizontal pole (312), the other end slidable mounting of horizontal pole (312) is in pull rod (37), inner wall elastic connection through No. three shell fragments and lagging (39) in slurcam (311), screening plate (2) are provided with two, and two screening plates (2) are through support fixed connection, the inner wall left side of screening installation (1) is rotated and is installed play flitch (9), it passes through No. six shell fragments and screening plate (2) elastic connection to go out flitch (9).

3. The plastic screening device of claim 1, wherein the plastic screening device comprises: the right side fixed mounting of screening installation (1) has elasticity gasbag (41), the air jet that runs through is seted up on the right side of screening installation (1), rotate on the inner wall of elasticity gasbag (41) and install jet-propelled pipe (44), jet-propelled pipe (44) and air jet intercommunication, fixed mounting has arc (42) No. one on the inner wall of elasticity gasbag (41), the top fixed mounting of arc (42) has arc push pedal (43), the triangle-shaped recess has been seted up in the left side of arc push pedal (43).

4. The plastic screening device of claim 1, wherein the plastic screening device comprises: the utility model discloses a screening machine, including connecting plate (36), connecting plate, movable rod (53), the top of movable rod (53) is articulated loop bar (52) in the left side fixed mounting of connecting plate (36), movable rod (52) are articulated in the left side of slide rod (51), movable rod (53) have been cup jointed in the top slip of loop bar (52), the top of movable rod (53) articulates the bottom in screening plate (2), fixed mounting has elastic telescopic rod (54) on the inner wall of loop bar (52), fixed mounting has fixed block (55) on the free end of elastic telescopic rod (54), rotate on the outer wall of fixed block (55) and install gyro wheel (56).

5. The plastic screening device of claim 3, wherein the plastic screening device is characterized in that: the left side of an arc (42) is rotated and is installed catch bar (61), and catch bar (61) and an arc (42) are fixed with No. four shell fragment both ends respectively, fixed mounting has lockplate (62) on the inner wall of elasticity gasbag (41), the right side fixed mounting of lockplate (62) has slider (63), the right side fixed mounting of slider (63) has elastic block (64).

6. The plastic screening device of claim 1, wherein the plastic screening device comprises: fixed mounting has a piston (71) on the outer wall of slurcam (311), a piston (71) slidable mounting is on the inner wall of lagging (39), gas outlet (72) have been seted up in the left side of lagging (39), the right side fixed mounting of gas outlet (72) has flexible pipe (73), the fixed slot has been seted up at the top of slurcam (311), flexible pipe (73) and fixed slot intercommunication.

7. The plastic screening device of claim 2, wherein the plastic screening device is characterized in that: no. two arc plates (83) are fixedly mounted on the left side of the third elastic sheet, a bump (84) is fixedly mounted at the bottom of each two arc plates (83), a second piston (81) is slidably mounted on the inner wall of each fixed groove, and a transmission rod (82) is fixedly mounted at the top of each second piston (81).

8. The plastic screening device of claim 7, wherein the plastic screening device comprises: the transmission rod (82) is elastically connected with the pushing plate (311) through a fifth elastic sheet, the top of the transmission rod (82) is in contact with the bump (84), the top of the pushing plate (311) is provided with an air inlet groove (85), and the air inlet groove (85) is communicated with the fixing groove.