CN111847831A

CN111847831A - Dewatering and consolidating method for dredging slurry

Info

Publication number: CN111847831A
Application number: CN202010695348.2A
Authority: CN
Inventors: 赵瑞荣
Original assignee: Huanqiu New Energy Technology Center
Current assignee: Huanqiu New Energy Technology Center
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2020-10-30

Abstract

The invention discloses a desilting slurry dewatering and consolidating method which realizes dewatering and consolidating of desilting slurry through desilting slurry dewatering and consolidating integrated equipment provided with a ring-shaped seat stand, a conical cover, a vacuum heat insulation ring, a graphite heat insulation ring, a motor A, a side frame, a motor B, a lifting shaft, a feeding bin, a rear seat, a motor C and a push shaft. The invention successfully solves the problems that the existing dehydration method proposed in the prior art mainly dehydrates in a centrifugal force water drainage and absorption mode, has low dehydration speed, can not continuously and uniformly remove water and crystallize the water, can not completely remove water in dredging mud better, and is easy to be blocked by equipment during dehydration to be not beneficial to quick removal.

Description

Dewatering and consolidating method for dredging slurry

Technical Field

The invention relates to the technical field of pollution treatment and recovery, in particular to a desilting slurry dewatering and consolidating method.

Background

Water conservancy faces three big problems of flood disaster aggravation, water resource shortage and water ecological environment deterioration, and unsmooth flood movement and water quality deterioration caused by serious siltation of river, sea and lake reservoirs are one of the important reasons for the three problems. Dredging the river, sea and lake reservoir, controlling and optimizing the environmental quality around the river, sea and lake reservoir, and is an important measure for promoting the sustainable development of national economy, particularly improving the passive situation of the current water conservancy industry and improving the living quality of people around the river, sea and lake reservoir.

A patent with patent number CN104874230B, for example, discloses a device for quickly dewatering sludge. The centrifugal machine comprises a conical centrifugal barrel which is narrow at the top and wide at the bottom and is driven by a power device to rotate, wherein a plurality of filter screens are arranged in the conical centrifugal barrel, the filter screens are radially arranged by taking a rotating shaft of the conical centrifugal barrel as a center, and the filter screens are all parallel to the rotating shaft of the conical centrifugal barrel; the filter screen is composed of a double-sided filter material and an interlayer between the double-sided filter material, a drainage channel is arranged on the interlayer, and the drainage channel is communicated with a drainage hole on the barrel wall of the conical centrifugal barrel; the upper end of the conical centrifugal barrel is provided with a slurry inlet, the lower end of the conical centrifugal barrel is connected with an escape bin, and the escape bin is provided with an escape outlet. The invention fully utilizes the centrifugal force and the centrifugal force difference to solve the problems of rapid separation of mud and rapid discharge of solid soil particles after separation, and has remarkable effect.

Another example is patent No. CN104803577B, which discloses a rapid dewatering device for high water content mud, said device comprising: the device comprises a mud water storage component, a mud inlet component, a liquid level measuring component, a mud inlet control component, an electroosmosis component, a conveying support component, a conveying component, a water absorbing component, a mud scraping component, a mud receiving component, a dewatering component and a water receiving component, wherein when mud moves to the top end along with the conveying component, mud on the surface of a water absorbing belt is scraped away through the mud scraping component, and the scraped mud falls into the mud receiving component; after the mud on the surface of the water absorbing component is scraped, the mud is extruded by the dewatering component to remove the water in the water absorbing component, and the extruded water falls into the water receiving component. The invention increases the discharging efficiency and obviously improves the dehydration efficiency of the slurry.

However, the dewatering method used at present mainly carries out dewatering by a centrifugal force drainage and water absorption mode, the dewatering speed is low, water cannot be continuously and uniformly and quickly removed and crystallized, water in the dredging slurry cannot be better and thoroughly removed, and meanwhile, equipment is easy to block during dewatering, so that the quick removal is not facilitated, the existing requirements are not met, and the dewatering and consolidating method for the dredging slurry is provided.

Disclosure of Invention

Problem (A)

The invention aims to provide a dewatering and consolidating method for dredging mud, which aims to solve the problems that the existing dewatering method proposed in the background art mainly dewaters in a centrifugal force drainage and water absorption mode, has low dewatering speed, can not continuously and uniformly drain water quickly and crystallize the water, can not drain water in the dredging mud completely and is easily blocked by equipment during dewatering, and is not beneficial to quick draining.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme:

a desilting mud dehydration concretion method, said method realizes the dehydration concretion of desilting mud through the desilting mud dehydration concretion integrated apparatus equipped with ring type seat platform, conical cover, vacuum heat-insulating ring, graphite heat-insulating ring, electrical machinery A, side bearer, electrical machinery B, lifting shaft, feed bin, back seat, electrical machinery C, push shaft;

The dredging slurry dewatering and solidifying integrated equipment comprises an annular seat platform; the main body of the ring-shaped seat stand is of an annular structure, a heater is arranged in the annular structure, and the inner side edge and the outer side edge of the ring-shaped seat stand are uniformly provided with a ring wall; the inner side ring wall of the ring-shaped seat stand is higher than the outer side ring wall, and the top of the inner side ring wall of the ring-shaped seat stand is fixedly provided with a conical cover; the middle bottom of the ring-type seat stand is fixedly provided with a vacuum heat-insulating ring, and the top of the vacuum heat-insulating ring is fixedly provided with a graphite heat-insulating ring; side frames are fixedly arranged on two sides of the annular seat platform, and the inner sides of the tops of the side frames are fixedly connected through connecting plates arranged on bolts; a lifting shaft is rotatably arranged in the middle of the connecting plate through a bearing; the lifting shaft also comprises a sun gear and a planetary gear; the outer side of the top of the lifting shaft is fixedly provided with a sun gear through key connection; three groups of planetary gears are rotatably arranged at the bottom of the connecting plate through a rotating shaft, and the planetary gears are meshed with the sun gear; a feeding bin is fixedly arranged in the middle of the bottom of the annular seat platform; a rear seat is fixedly arranged at the rear end of the feeding bin; the rear end of the rear seat is slidably provided with two groups of push shafts.

The ring-type seat platform also comprises a sunken channel, an inclined baffle and a conveying belt; a sunken channel is integrally formed at one end of the front side of the annular seat platform; inclined baffles are uniformly arranged at two ends of the inner side of the sunken channel, and the top of the rear side of the sunken channel extends towards the front side; a conveying belt is rotatably arranged in the concave channel through a rotating shaft; a motor A is fixedly arranged on one side of the sunken channel, and a rotating shaft of the motor A is provided with a bevel gear in transmission connection with the conveying belt.

The cone cover further comprises an annular heater; the outer side of the conical cover is of a conical structure, a vertical pipe structure is integrally arranged in the middle of the conical cover, and the bottom of the vertical pipe structure is communicated with the feeding bin; and the inner side of the outer wall of the conical cover is fixedly provided with an annular heater.

The lifting shaft also comprises a gear ring, a connecting rod and a push plate; a motor B is fixedly arranged on the rear side of the top of the connecting plate, and the motor B is in meshing transmission connection with a bevel gear arranged on the top of the lifting shaft; a gear ring is rotatably arranged on the outer side of the planet gear, and one side of the gear ring extends outwards; the bottom of the extending part of the gear ring is fixedly provided with a connecting rod, the bottom of the connecting rod is fixedly provided with a push plate, and the push plate is arranged in the ring-type seat platform in a sliding mode.

Preferably, the bottom outside integral type of promotion axle is provided with the screw, and the screw main part is located the bell, and the bottom of screw is located the feeding storehouse.

Preferably, the feeding bin further comprises a feeding hole, a partition plate and a one-way plate; a feed inlet is integrally formed in the top of the rear side of the feed bin; a partition plate is integrally arranged in the middle of the rear side of the feeding bin; the top of the front side of the two ends of the partition board is provided with a one-way board through rotation of a rotating shaft, and the bottom of the one-way board is naturally vertical to the bottom surface of the feeding bin.

Preferably, the rear seat further comprises a motor groove, a transmission shaft and a driven gear; a motor groove is formed in the middle of the rear side of the rear seat, and a transmission shaft is rotatably arranged on the front side of the motor groove through a shaft bracket structure matched with a bearing; a motor C is fixedly arranged on the rear side of the motor groove, and the motor C is in meshing transmission connection with a bevel gear arranged at the top of the transmission shaft; driven gears are rotatably arranged on two sides of the top of the rear seat through a rotating shaft, and gears are arranged on the outer side of the top of the transmission shaft and meshed with the two groups of driven gears; the top of the driven gear is provided with a shaft rod in a whole manner, and the positions of the shaft rods at the top of the two groups of driven gears are staggered.

Preferably, the push shaft further comprises a strip-shaped frame, a frame and a one-way strip; the rear sides of the push shafts are fixedly provided with strip frames, and the strip frames are respectively arranged on the outer sides of the shaft levers at the tops of the driven gears in a sliding manner; the front sides of the push shafts are connected with a frame through a support structure; the inboard of frame all is provided with one-way strip through the pivot rotation, and one-way strip all can overturn to the front side.

(III) advantageous effects

The invention provides a desilting mud dehydration and consolidation method, which can quickly evaporate desilting mud by arranging an annular heater, can dehydrate the desilting mud, has high evaporation speed and uniform evaporation, can effectively discharge water in the mud, and can directly evaporate steam without being hindered during dehydration because a conical cover and an annular seat are arranged in the open air.

Secondly, the lifting shaft can drive the planetary gear to rotate through the sun gear while rotating, the gear ring core connecting rod is continuously circulated, the push plate is used for scraping, the dehydrated slurry solidified body is pushed into the concave channel, and the solidified body is discharged through the conveying belt in the concave channel; meanwhile, the inclined baffles are arranged on the two sides of the concave channel, so that the consolidation body can be guaranteed to accurately fall on the surface of the transmission belt.

Moreover, the setting of pushing away the axle provides and lasts even grog function, can last to carry mud through the cooperation of one-way board and one-way strip, and the hookup location of bar frame and driven gear is crisscross, can guarantee that the transportation process of mud is crisscross and not be interrupted, has effectively guaranteed the transport of mud.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective front view of an embodiment of the present invention;

FIG. 3 is a schematic bottom view of an embodiment of the present invention;

FIG. 4 is a partial cross-sectional structural schematic view of an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a rear seat according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a push shaft according to an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a lift shaft in an embodiment of the present invention;

FIG. 8 is an enlarged partial structural view of part A in the embodiment of the present invention;

in fig. 1 to 8, the correspondence between the part names or lines and the reference numbers is:

1. a ring-type seat stand; 101. a recessed channel; 102. an inclined baffle plate; 103. a conveyor belt; 2. a conical cover; 201. a ring heater; 3. a vacuum heat-insulating ring; 4. a graphite heat-insulating ring; 5. a motor A; 6. a side frame; 601. a connecting plate; 7. a motor B; 8. a lift shaft; 801. a sun gear; 802. a planetary gear; 803. a gear ring; 804. a connecting rod; 805. pushing the plate; 9. a feeding bin; 901. a feed inlet; 902. a partition plate; 903. a one-way plate; 10. a rear seat; 1001. a motor slot; 1002. a drive shaft; 1003. a driven gear; 11. a motor C; 12. pushing the shaft; 1201. a bar frame; 1202. a frame; 1203. a unidirectional strip.

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.

Referring to fig. 1 to 8, an embodiment of the present invention includes:

a desilting mud dehydration concretion method, said method is through having annular seat stand 1, conical cover 2, vacuum heat-insulating ring 3, graphite heat-insulating ring 4, electrical machinery A5, side bearer 6, electrical machinery B7, lifting shaft 8, feed bin 9, back seat 10, electrical machinery C11, desilting mud dehydration concretion integrated apparatus of the push shaft 12 to realize the dehydration concretion of the desilting mud;

the dredging slurry dewatering and solidifying integrated equipment comprises an annular seat stand 1; the main body of the ring-shaped seat stand 1 is of a ring-shaped structure, a heater is arranged in the ring-shaped structure, and the inner side edge and the outer side edge of the ring-shaped seat stand 1 are uniformly provided with a ring wall; the inner side ring wall of the ring-shaped seat stand 1 is higher than the outer side ring wall, and the top of the inner side ring wall of the ring-shaped seat stand 1 is fixedly provided with a conical cover 2; the middle bottom of the ring-type seat stand 1 is fixedly provided with a vacuum heat-insulating ring 3, and the top of the vacuum heat-insulating ring 3 is fixedly provided with a graphite heat-insulating ring 4; side frames 6 are fixedly arranged on two sides of the annular seat platform 1, and the inner sides of the tops of the side frames 6 are fixedly connected through bolt arrangement connecting plates 601; a lifting shaft 8 is rotatably arranged in the middle of the connecting plate 601 through a bearing; the lifting shaft 8 further comprises a sun gear 801, planet gears 802; the outer side of the top of the lifting shaft 8 is fixedly provided with a sun gear 801 through key connection; the bottom of the connecting plate 601 is rotatably provided with three groups of planetary gears 802 through a rotating shaft, and the planetary gears 802 are meshed with the sun gear 801; a feeding bin 9 is fixedly arranged in the middle of the bottom of the annular seat platform 1; a rear seat 10 is fixedly arranged at the rear end of the feeding bin 9; two groups of push shafts 12 are slidably arranged at the rear end of the rear seat 10.

Wherein, the ring-type seat stand 1 also comprises a concave channel 101, an inclined baffle plate 102 and a conveyor belt 103; one end of the front side of the ring-type seat stand 1 is integrally provided with a sunken channel 101; inclined baffles 102 are uniformly arranged at two ends of the inner side of the concave channel 101, and the top of the rear side of the concave channel 101 extends towards the front side; a conveyor belt 103 is rotatably arranged in the concave channel 101 through a rotating shaft; a motor A5 is fixedly arranged on one side of the concave channel 101, and a bevel gear is arranged on the rotating shaft of the motor A5 and is in transmission connection with the conveyor belt 103.

Wherein, the conical cover 2 also comprises a ring-shaped heater 201; the outer side of the conical cover 2 is of a conical structure, a vertical pipe structure is integrally arranged in the middle of the conical cover 2, and the bottom of the vertical pipe structure is communicated with the feeding bin 9; the inner side of the outer wall of the conical cover 2 is fixedly provided with a ring-shaped heater 201.

Wherein, the lifting shaft 8 also comprises a gear ring 803, a connecting rod 804 and a push plate 805; a motor B7 is fixedly arranged on the rear side of the top of the connecting plate 601, and a bevel gear meshed with and in transmission connection with the top of the lifting shaft 8 is arranged on the motor B7; the outer side of the planetary gear 802 is rotatably provided with a gear ring 803, and one side of the gear ring 803 extends outwards; the bottom of the extension of the gear ring 803 is fixedly provided with a connecting rod 804, and the bottom of the connecting rod 804 is fixedly provided with a push plate 805, the push plate 805 is slidably arranged in the ring-type seat 1.

Wherein, the bottom outside integral type of lifting shaft 8 is provided with screw, and the screw main part is arranged in conical cover 2, and screw's bottom is arranged in feeding storehouse 9.

Wherein, the feeding bin 9 also comprises a feeding hole 901, a clapboard 902 and a one-way plate 903; a feed inlet 901 is integrally formed at the top of the rear side of the feed bin 9; a partition plate 902 is integrally arranged in the middle of the rear side of the feeding bin 9; the tops of the front sides of the two ends of the partition 902 are both provided with a one-way plate 903 in a rotating way through a rotating shaft, and the bottoms of the one-way plates 903 are naturally vertical to the bottom surface of the feeding bin 9.

Wherein, the rear seat 10 also comprises a motor groove 1001, a transmission shaft 1002 and a driven gear 1003; a motor groove 1001 is formed in the middle of the rear side of the rear base 10, and a transmission shaft 1002 is rotatably arranged on the front side of the motor groove 1001 through a shaft bracket structure matched with a bearing; a motor C11 is fixedly arranged at the rear side of the motor groove 1001, and a bevel gear meshed with and in transmission connection with the top of the transmission shaft 1002 is arranged at the motor C11; driven gears 1003 are rotatably arranged on two sides of the top of the rear seat 10 through rotating shafts, and gears are arranged on the outer side of the top of the transmission shaft 1002 and meshed with the two groups of driven gears 1003; the top of the driven gears 1003 is integrally provided with a shaft rod, and the positions of the shaft rods at the top of the two groups of driven gears 1003 are staggered.

The pushing shaft 12 further comprises a bar frame 1201, a frame 1202 and a one-way bar 1203; the rear sides of the push shafts 12 are fixedly provided with strip frames 1201, and the strip frames 1201 are respectively arranged outside the shaft lever at the top of the driven gear 1003 in a sliding manner; the front sides of the push shafts 12 are respectively provided with a frame 1202 through a support structure in a connecting manner, and the frames 1202 are attached to and slide in the channels on the two sides of the feeding bin 9 and the partition 902; the inner sides of the frames 1202 are all provided with one-way strips 1203 in a rotating mode through rotating shafts, and the one-way strips 1203 can be overturned towards the front side.

The working principle is as follows: during the use, pour desilting mud into feed inlet 901, start motor C11, motor C11 drives the transmission shaft 1002 through the bevel gear and rotates, and transmission shaft 1002 drives two sets of driven gear 1003 rotatoryly through the gear, and driven gear 1003 drives two sets of push shafts 12 and lasts reciprocating motion, lasts and drives frame 1202 and remove, and frame 1202 promotes desilting mud through one-way strip 1203 and moves to the bottom centre of ring type seat 1, lasts and carries the bottom position of lift shaft 8 with desilting mud.

Starting the motor B7 and the annular heater 201, driving the lifting shaft 8 to continuously rotate by the motor B7, lifting the dredging slurry by using the screw propeller and discharging the dredging slurry from the top of the conical cover 2, and enabling the dredging slurry to uniformly adhere to the outer side conical structure of the conical cover 2 and slide down; the ring heater 201 heats the outside of the cone cover 2, heats up while the dredging slurry slides over the cone cover 2, and falls into the ring-type seat 1 while heating up; when the lifting shaft 8 rotates, the sun gear 801 drives the planetary gear 802 to rotate, so that the gear ring 803 continuously rotates, the connecting rod 804 and the push plate 805 are driven to rotate, the solidified dredging mud falling into the ring-shaped seat table 1 is discharged into the concave channel 101, the motor A5 drives the conveyor belt 103 to continuously rotate, and a solidified body is discharged; the vacuum insulation ring 3 and the graphite insulation ring 4 can insulate heat.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A desilting slurry dewatering and consolidating method is characterized in that: the method realizes dehydration and consolidation of dredging slurry through dredging slurry dehydration and consolidation integrated equipment provided with an annular seat stand (1), a conical cover (2), a vacuum heat-insulation ring (3), a graphite heat-insulation ring (4), a motor A (5), a side frame (6), a motor B (7), a lifting shaft (8), a feeding bin (9), a rear seat (10), a motor C (11) and a push shaft (12);

the dredging slurry dewatering and solidifying integrated equipment comprises an annular seat stand (1); the main body of the ring-shaped seat stand (1) is of a ring-shaped structure, a heater is arranged in the ring-shaped structure, and the inner side edge and the outer side edge of the ring-shaped seat stand (1) are uniformly provided with a ring wall; the inner side annular wall of the annular seat stand (1) is higher than the outer side annular wall, and the top of the inner side annular wall of the annular seat stand (1) is fixedly provided with a conical cover (2); a vacuum heat-insulating ring (3) is fixedly arranged at the bottom of the middle of the ring-type seat stand (1), and a graphite heat-insulating ring (4) is fixedly arranged at the top of the vacuum heat-insulating ring (3); side frames (6) are fixedly arranged on two sides of the annular seat stand (1), and the inner sides of the tops of the side frames (6) are fixedly connected through bolt setting connecting plates (601); a lifting shaft (8) is rotatably arranged in the middle of the connecting plate (601) through a bearing; the lifting shaft (8) also comprises a sun gear (801) and a planetary gear (802); the outer side of the top of the lifting shaft (8) is fixedly provided with a sun gear (801) through key connection; the bottom of the connecting plate (601) is rotatably provided with three groups of planetary gears (802) through a rotating shaft, and the planetary gears (802) are meshed with the sun gear (801); a feeding bin (9) is fixedly arranged in the middle of the bottom of the ring-shaped seat platform (1); a rear seat (10) is fixedly arranged at the rear end of the feeding bin (9); two groups of push shafts (12) are arranged at the rear end of the rear seat (10) in a sliding manner;

The ring-type seat stand (1) also comprises a concave channel (101), an inclined baffle (102) and a conveyor belt (103); one end of the front side of the ring-shaped seat stand (1) is integrally provided with a sunken channel (101); inclined baffles (102) are uniformly arranged at two ends of the inner side of the concave channel (101), and the top of the rear side of the concave channel (101) extends towards the front side; a conveyor belt (103) is rotatably arranged in the concave channel (101) through a rotating shaft; a motor A (5) is fixedly arranged on one side of the sunken channel (101), and a bevel gear is arranged on a rotating shaft of the motor A (5) and is in transmission connection with the conveying belt (103);

the conical cover (2) also comprises an annular heater (201); the outer side of the conical cover (2) is of a conical structure, a vertical pipe structure is integrally arranged in the middle of the conical cover (2), and the bottom of the vertical pipe structure is communicated with the feeding bin (9); an annular heater (201) is fixedly arranged on the inner side of the outer wall of the conical cover (2);

the lifting shaft (8) also comprises a gear ring (803), a connecting rod (804) and a push plate (805); a motor B (7) is fixedly arranged on the rear side of the top of the connecting plate (601), and bevel gears are arranged on the tops of the motor B (7) and the lifting shaft (8) and are in meshing transmission connection; a gear ring (803) is rotatably arranged on the outer side of the planetary gear (802), and one side of the gear ring (803) extends outwards; the bottom of the extending part of the gear ring (803) is fixedly provided with a connecting rod (804), the bottom of the connecting rod (804) is fixedly provided with a push plate (805), and the push plate (805) is arranged in the ring-type seat table (1) in a sliding manner.

2. A method of dewatering and consolidating dredging sludge as claimed in claim 1, wherein: the outer side of the bottom of the lifting shaft (8) is integrally provided with a spiral propeller, the main body of the spiral propeller is positioned in the conical cover (2), and the bottom of the spiral propeller is positioned in the feeding bin (9); the feeding bin (9) also comprises a feeding hole (901), a partition plate (902) and a one-way plate (903); a feed inlet (901) is integrally formed in the top of the rear side of the feed bin (9); a partition plate (902) is integrally arranged in the middle of the rear side of the feeding bin (9); the top of the front side of the two ends of the partition plate (902) is provided with a one-way plate (903) in a rotating way through a rotating shaft, and the bottom of the one-way plate (903) is naturally vertical to the bottom surface of the feeding bin (9).

3. A method of dewatering and consolidating dredging sludge as claimed in claim 2, wherein: the rear seat (10) also comprises a motor groove (1001), a transmission shaft (1002) and a driven gear (1003); a motor groove (1001) is formed in the middle of the rear side of the rear base (10), and a transmission shaft (1002) is rotatably arranged on the front side of the motor groove (1001) through a shaft bracket structure matched with a bearing; a motor C (11) is fixedly arranged on the rear side of the motor groove (1001), and the motor C (11) is in meshing transmission connection with a bevel gear arranged at the top of the transmission shaft (1002); driven gears (1003) are rotatably arranged on two sides of the top of the rear seat (10) through rotating shafts, and gears are arranged on the outer side of the top of the transmission shaft (1002) and meshed with the two groups of driven gears (1003); the top of the driven gears (1003) is uniformly provided with shaft rods, and the positions of the shaft rods at the top of the two groups of driven gears (1003) are staggered; the push shaft (12) further comprises a strip-shaped frame (1201), a frame (1202) and a one-way strip (1203); the rear sides of the push shafts (12) are fixedly provided with strip frames (1201), and the strip frames (1201) are respectively arranged on the outer sides of the shaft levers at the tops of the driven gears (1003) in a sliding mode; the front sides of the push shafts (12) are respectively provided with a frame (1202) through a support structure; the inner sides of the frames (1202) are all provided with one-way strips (1203) in a rotating mode through rotating shafts, and the one-way strips (1203) can be overturned towards the front side.