CN111591692A

CN111591692A - Spiral conveying mechanism for slurry non-landing system

Info

Publication number: CN111591692A
Application number: CN202010439541.XA
Authority: CN
Inventors: 唐伯成; 陈晓爱; 唐晟宇
Original assignee: Bokesite Industrial Technology Jiangsu Co ltd
Current assignee: Bokesite Industrial Technology Jiangsu Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-28

Abstract

The invention discloses a spiral conveying mechanism for a slurry non-landing system, which comprises a speed reducer and a conveying cylinder, the speed reducer is arranged on the parallel left side of the conveying cylinder, the left end of the speed reducer is connected with a working motor, the conveying cylinder is transversely internally connected with a conveying rotating shaft, by adding a novel dredging anti-blocking device at the bottom of the discharge hopper of the spiral conveying mechanism for the mud non-landing system, and the novel dredging anti-clogging device can do horizontal circumferential rotation through the reinforcing ring connected to the bottom of the discharge hopper, thus, when the interior of the discharge hopper is blocked, the blocked discharge hopper can be dredged by manually operating the dredging and anti-blocking device, thereby preventing the situation that the slurry remained after the slurry is conveyed in the discharging hopper is solidified and is difficult to clean and block, therefore, the whole slurry can be stably conveyed and used for a long time by the spiral conveying mechanism for the system without falling to the ground.

Description

Spiral conveying mechanism for slurry non-landing system

Technical Field

The invention belongs to the technical field of spiral conveyors, and particularly relates to a spiral conveying mechanism for a mud non-landing system.

Background

The screw conveyer is a machine which utilizes a motor to drive a screw to rotate and push materials so as to realize the conveying purpose, can horizontally, obliquely or vertically convey, and has the advantages of simple structure, small cross-sectional area, good sealing performance, convenient operation, easy maintenance, convenient closed transportation and the like The friction resistance of materials, the spiral blades welded on the rotating shaft of the spiral conveyor, the surface type of the blades have the solid surface type, the belt surface type, the blade surface type and other types according to different conveyed materials, the thrust bearing is arranged at the terminal of the spiral shaft of the spiral conveyor in the material moving direction so as to provide axial reaction force for the spiral along with the materials, and when the length is longer, a middle hanging bearing is added.

The prior spiral conveying mechanism for the slurry non-landing system has the following problems: current mud does not fall to the ground screw conveyor for system mainly carries two points to mud, it is from A point to carry B point to mud, and the mud of carrying then has soft or hard, when the mud of carrying is harder, when the mud carries ejection of compact department from carrying a section of thick bamboo feed site this moment, mud can discharge through the play hopper of ejection of compact department, and because the mud of being carried is harder, then can cause the inside of mud jam at a hopper easily like this, thereby prevent normal transport of mud and discharge, like this still need the workman to use the incessant business turn over hopper inside of disclosing of rod and dredge it, such mediation mode not only complex operation also can influence the mediation efficiency to a hopper simultaneously, thereby be unfavorable for whole mud does not fall to the ground stable use of screw conveyor for system.

Disclosure of Invention

The invention aims to provide a spiral conveying mechanism for a slurry non-landing system, which aims to solve the problems that when the conveyed slurry is hard, the slurry is discharged through a discharge hopper at the discharge position when the slurry is conveyed from the feeding position of a conveying cylinder to the discharge position, and the conveyed slurry is hard, so that the slurry is easily blocked in the discharge hopper, and the normal conveying and discharging of the slurry are prevented.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a mud does not fall to ground spiral delivery mechanism for system, includes reduction gear and a transport section of thick bamboo, the parallel left side at a transport section of thick bamboo is installed to the reduction gear, the left end of reduction gear is connected with the work motor, the horizontal internal connection of a transport section of thick bamboo has the transport pivot, the leftmost end of transport pivot passes a transport section of thick bamboo left end and is connected with the reduction gear transmission, solid fixed ring has been cup jointed on the circumference outer wall of a transport section of thick bamboo, solid fixed ring, reduction gear and work motor's bottom all is provided with the mounting bracket, a transport section of thick bamboo is close to left side upper end and is provided with the ascending feeder hopper of opening, a transport section of thick bamboo is close to right side lower extreme and is provided with the downward play hopper of opening, the lower extreme that goes out the hopper is connected with mediation anti, T type slider, connection dead lever, vertical action bars and reinforcement ring, the reinforcement ring passes through welded connection in the bottom of a hopper, reinforcement ring circumference outside inside is provided with the downward ring T type spout of opening, the inside of ring T type spout is embedded to have T type slider, the lower extreme of T type slider is connected with vertical action bars, vertical action bars sets up outside the lower extreme of reinforcement ring, vertical action bars is close to and is provided with the connection dead lever on the upside left end outer wall, the left end of connecting the dead lever is connected with vertical bull stick, vertical bull stick passes the reinforcement ring and sets up inside a hopper, be connected with on the left side inner wall of vertical bull stick and scrape the movable fin.

Preferably, the fixed bearing is embedded in the center of the left end and the right end of the conveying cylinder, and the conveying rotating shaft is fixedly connected with the conveying cylinder through the two fixed bearings.

Preferably, the conveying rotating shaft circumferential outer wall inside the conveying barrel circumference is connected with the spiral conveying piece from left to right, the pushing direction of the spiral conveying piece faces right when the conveying rotating shaft rotates clockwise, the pushing direction of the spiral conveying piece faces left when the conveying rotating shaft rotates anticlockwise, and the circumferential outer wall of the spiral conveying piece is not attached to the circumferential inner wall of the conveying barrel.

Preferably, fixed ring is provided with four altogether, four fixed ring all through welding and a transport section of thick bamboo fixed connection, four the mounting bracket that fixed ring and reduction gear and work motor bottom are connected keeps horizontal parallel and level down.

Preferably, the vertical rotating rod and the inner wall of the circumference of the discharge hopper are kept vertical and parallel, the vertical rotating rod is arranged on one side of the circle center of the discharge hopper, and an anti-skid sleeve is further sleeved outside the circumference of the lower half section of the vertical operating rod and used for operating anti-skid.

Preferably, feeder hopper and play hopper all pass through screw and conveying cylinder fixed connection, feeder hopper and play hopper all communicate with conveying cylinder is inside, it has waterborne paint to be used for anticorrosive rust-resistant to all coat on the outer wall of feeder hopper, conveying cylinder and play hopper.

Preferably, the T-shaped sliding block can be driven by the vertical operating rod to circumferentially slide inside the circular T-shaped sliding groove, the reinforcing ring is fixedly connected with the discharge hopper through welding, and the inner circumferential walls of the reinforcing ring and the discharge hopper are parallel and level.

Compared with the prior art, the invention provides a spiral conveying mechanism for a slurry non-landing system, which has the following beneficial effects:

1. according to the invention, the novel dredging anti-blocking device is additionally arranged at the bottom of the discharge hopper of the spiral conveying mechanism for the slurry non-landing system, and can rotate horizontally and circularly through the reinforcing ring connected to the bottom of the discharge hopper, so that when the inside of the discharge hopper is blocked, the blocked discharge hopper can be dredged by manually operating the dredging anti-blocking device, and the situation that the residual slurry is difficult to clean and block after being conveyed inside the discharge hopper is solidified is prevented, and the whole spiral conveying mechanism for the slurry non-landing system can be used for conveying the slurry stably for a long time;

2. the invention relates to a dredging anti-clogging device, which comprises a scraping wing, a vertical rotating rod, a circular T-shaped chute, a T-shaped slider, a connecting fixing rod, a vertical operating rod and a reinforcing ring, wherein the reinforcing ring is connected to the bottom of a discharge hopper through welding, the opening of the circular T-shaped chute is downwards embedded in the circumference of the reinforcing ring, the T-shaped slider is additionally arranged in the circular T-shaped chute, the bottom of the T-shaped slider is additionally provided with the vertical operating rod, the vertical rotating rod is additionally arranged in the feed hopper, the vertical rotating rod and the vertical operating rod are fixedly connected through the connecting fixing rod, so that when the discharge hopper is blocked, a user can hold the vertical operating rod by hand and rotate the circumference clockwise and anticlockwise, at the moment, the vertical operating rod can stably rotate the circumference by embedding the T-shaped slider in the circular T-shaped chute, and the embedded fixing of T type slider just can not produce not hard up the dropping inside the annular T type spout, and then can be through the connection of connecting the fixed link and the ring shape rotation is done along feeder hopper circumference inner wall in the synchronous drive vertical bull stick inside the play hopper when the horizontal circumference of vertical action bars rotates, and vertical bull stick then can drive the scraping wing piece of connecting on the outer wall of one side of it and give scraping and dredge the mud that blocks up in the feeder hopper inside when the inside ring of feeder hopper rotates, thereby play the mediation and prevent blockking up the effect to the feeder hopper, and scraping the wing piece and be sheet structure, then can not influence the normal ejection of compact operation of a hopper like this, thereby make whole mud not fall to the ground for the system screw conveyor construct can be stable carry out mud transport work always.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention without limiting the invention in which:

FIG. 1 is a schematic view of an external plane structure of a screw conveying mechanism for a slurry non-landing system according to the present invention;

FIG. 2 is a schematic view of the internal plan structure of a screw conveying mechanism for a slurry non-landing system according to the present invention;

FIG. 3 is a schematic vertical sectional view of the dredging and anti-clogging device according to the present invention;

in the figure: 1. a working motor; 2. a speed reducer; 3. a conveying rotating shaft; 4. a feed hopper; 5. a delivery cartridge; 6. a fixing ring; 7. a mounting frame; 8. a discharge hopper; 9. dredging the anti-blocking device; 10. a spiral conveying sheet; 11. fixing the bearing; 12. a scraping wing panel; 13. a vertical rotating rod; 14. a circular ring T-shaped chute; 15. a T-shaped slider; 16. connecting a fixed rod; 17. a vertical operating rod; 18. and (7) reinforcing the ring.

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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the present invention provides a technical solution: a spiral conveying mechanism for a slurry non-landing system comprises a speed reducer 2 and a conveying cylinder 5, wherein the speed reducer 2 is installed on the parallel left side of the conveying cylinder 5, the left end of the speed reducer 2 is connected with a working motor 1, the conveying cylinder 5 is transversely internally connected with a conveying rotating shaft 3, the leftmost end of the conveying rotating shaft 3 penetrates through the left end of the conveying cylinder 5 and is in transmission connection with the speed reducer 2, fixing rings 6 are sleeved on the outer wall of the circumference of the conveying cylinder 5, the four fixing rings 6 are arranged in total, the four fixing rings 6 are fixedly connected with the conveying cylinder 5 through welding, the four fixing rings 6 are horizontally aligned with the lowermost end of a mounting frame 7 connected with the speed reducer 2 and the bottom of the working motor 1, the four fixing rings 6 are arranged at equal intervals and fixed with the conveying cylinder 5, so that the conveying cylinder 5 can be fixed more firmly, and meanwhile, the vibration influence generated, thereby increasing the stability of the screw conveying mechanism for the whole slurry non-landing system during working and use, the fixing ring 6, the speed reducer 2 and the working motor 1 are all provided with a mounting rack 7 at the bottom, the conveying cylinder 5 is provided with a feed hopper 4 with an upward opening near the upper end of the left side, the conveying cylinder 5 is provided with a discharge hopper 8 with a downward opening near the lower end of the right side, the feed hopper 4 and the discharge hopper 8 are both fixedly connected with the conveying cylinder 5 through screws, the feed hopper 4 and the discharge hopper 8 are both communicated with the inside of the conveying cylinder 5, the outer walls of the feed hopper 4, the conveying cylinder 5 and the discharge hopper 8 are coated with water-based paint for corrosion and rust prevention, thus the feed hopper 4 and the discharge hopper 8 with different calibers can be rapidly replaced according to the conveying requirement, thereby increasing the use flexibility of the screw conveying mechanism for the whole slurry non-landing system, and because the feed, if the slurry conveying device is directly exposed for use, the slurry conveying device can be easily attacked by slurry and external water vapor to cause rusting and corrosion, the water-based paint can play a role in isolation, so that the three can be prevented from rusting, the whole slurry can be ensured to be used for a longer time without falling to the ground by using the spiral conveying mechanism for the system, the lower end of the discharge hopper 8 is connected with the dredging anti-blocking device 9, when the inside of the discharge hopper 8 is blocked, the blocked discharge hopper 8 can be dredged by manually operating the dredging anti-blocking device 9, the phenomenon that the slurry is difficult to clean and block after the residual slurry is solidified after the slurry is conveyed inside the discharge hopper 8 can be prevented, the whole slurry can be ensured to be stably conveyed and used by using the spiral conveying mechanism for the system for no falling to the ground for a long time by using the working motor 1 through the electrical connection of an external power supply, the spiral conveying pieces 10 are connected to the, carry spiral delivery piece 10's direction of thrust when 3 clockwise rotations of pivot to the right side, spiral delivery piece 10's direction of thrust when carrying 3 anticlockwise rotations of pivot is towards the left side, spiral delivery piece 10's circumference outer wall all not with the laminating of the circumference inner wall of transfer cylinder 5, transfer cylinder 5 is controlled inside both ends center department and is all embedded to have fixing bearing 11, carry pivot 3 through two fixing bearing 11 and transfer cylinder 5 fixed connection, fixing bearing 11 can enough play the fixed action to carrying pivot 3, can supply again to make simultaneously to carry pivot 3 to be the circumference rotation, thereby just can make whole mud not fall to the ground the system with spiral delivery mechanism can normally carry out the mud and carry the operation.

A spiral conveying mechanism for a mud non-landing system is disclosed, wherein a dredging anti-blocking device 9 comprises a scraping wing 12, a vertical rotating rod 13, a circular T-shaped sliding groove 14, a T-shaped sliding block 15, a connecting fixing rod 16, a vertical operating rod 17 and a reinforcing ring 18, the reinforcing ring 18 is connected to the bottom of a discharge hopper 8 through welding, the circular T-shaped sliding groove 14 with a downward opening is arranged inside the outermost side of the circumference of the reinforcing ring 18, the T-shaped sliding groove 14 is embedded inside the circular T-shaped sliding groove 15, the lower end of the T-shaped sliding block 15 is connected with the vertical operating rod 17, the vertical operating rod 17 is arranged outside the lower end of the reinforcing ring 18, the connecting fixing rod 16 is arranged on the outer wall of the vertical operating rod 17 close to the left end of the upper side, the left end of the connecting fixing rod 16 is connected with the vertical rotating rod 13, the vertical rotating rod 13 penetrates through the reinforcing ring 18 and is arranged inside the discharge, the vertical rotating rod 13 is vertically parallel and level with the inner wall of the circumference of the discharging hopper 8, the vertical rotating rod 13 is arranged at one side of the circle center of the discharging hopper 8, the outer part of the circumference of the lower half section of the vertical operating rod 17 is also sleeved with an anti-skid sleeve for anti-skid operation, a T-shaped sliding block 15 can be driven by the vertical operating rod 17 to do circumferential sliding in a circular T-shaped sliding chute 14, a reinforcing ring 18 is fixedly connected with the discharging hopper 8 by welding, the reinforcing ring 18 is parallel and level with the inner wall of the circumference of the discharging hopper 8, when the vertical operating rod 17 rotates along the horizontal circumference, the vertical rotating rod 13 can be synchronously driven by the connection of a connecting and fixing rod 16 to do circular rotation along the inner wall of the circumference of the feeding hopper 4 in the discharging hopper 8, and when the circular rotation of the vertical rotating rod 13 in the feeding hopper 4, the vertical rotating rod 13 can drive a scraping wing 12 connected on the outer wall of one side of the vertical rotating, when the discharge hopper 8 is blocked, a user can hold the vertical operating rod 17 by hand and do circumferential rotation clockwise and anticlockwise, at the moment, the vertical operating rod 17 can stably do circumferential rotation by embedding the T-shaped slider 15 in the circular T-shaped chute 14, the T-shaped slider 15 is embedded and fixed in the circular T-shaped chute 14 and cannot be loosened and fall off, when the vertical operating rod 17 rotates horizontally and circumferentially, the vertical rotating rod 13 is synchronously driven to do circular rotation along the inner wall of the circumference of the discharge hopper 4 in the discharge hopper 8 through the connection of the connecting and fixing rod 16, and the vertical rotating rod 13 drives the scraping wing piece 12 connected on the outer wall of one side of the vertical rotating rod 13 to scrape and dredge the slurry blocked in the discharge hopper 4 when rotating circularly in the discharge hopper 4, so that the dredging and anti-blocking effects on the discharge hopper 4 are achieved, and the scraping wing pieces 12 are of a sheet structure, therefore, the normal discharging operation of the discharging hopper 8 cannot be influenced, and the whole slurry can be stably conveyed by the spiral conveying mechanism for the system without falling to the ground.

The working principle and the using process of the invention are as follows: after the installation of the screw conveying mechanism for the slurry non-landing system, when the screw conveying mechanism for the slurry non-landing system is used, firstly, the working motor 1, the speed reducer 2 and the conveying cylinder 5 which are connected together on the screw conveying mechanism for the slurry non-landing system are installed on an installation position needing slurry conveying through the installation frame 7, then, the working motor 1 needs to be electrified for use, and the model of the working motor 1 is as follows: GB/T1029-1993, after the working motor 1 is powered on, the working motor slowly drives the conveying rotating shaft 3 to rotate clockwise at a constant speed through the deceleration of the decelerator 2, at the moment, slurry is required to be poured through the feed hopper 4, after the slurry is poured into the rear end of the conveying cylinder 5 through the feed hopper 4, the conveying rotating shaft 3 rotating clockwise at a constant speed drives the spiral conveying sheet 10 on the circumferential outer wall to rotate, the spiral conveying sheet 10 can spirally push the slurry in the rear end of the conveying cylinder 5 forwards when rotating clockwise, after the slurry is spirally pushed into the front end of the conveying cylinder 5 by the spiral conveying sheet 10, the slurry is discharged to a designated conveying position through the discharge hopper 8 at the bottom of the front end of the conveying cylinder 5, so that the purpose of conveying the slurry without falling to the ground is achieved, and a novel anti-blocking dredging device 9 is additionally arranged at the bottom of the discharge hopper 8 of the spiral conveying mechanism for the slurry non-falling system, and this neotype mediation anti-clogging device 9 can be through connecting at the reinforcing ring 18 of the 8 bottom of play hopper and do horizontal circumference and rotate, like this when the inside jam that appears of play hopper 8, this mediation anti-clogging device 9 of accessible manual operation comes to dredge the play hopper 8 that blocks up this moment to prevent to go out the condition appearance that causes difficult clearance and jam after the remaining mud solidifies after 8 inside transport of hopper, can guarantee like this that whole mud does not fall to the ground for the system spiral conveying mechanism can carry out the mud transport use for permanent stability always.

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 a mud does not fall to ground screw feed mechanism for system, includes reduction gear (2) and delivery cylinder (5), its characterized in that: the device is characterized in that the speed reducer (2) is arranged on the parallel left side of the conveying cylinder (5), the left end of the speed reducer (2) is connected with the working motor (1), the conveying rotating shaft (3) is transversely connected inside the conveying cylinder (5), the leftmost end of the conveying rotating shaft (3) penetrates through the left end of the conveying cylinder (5) and is in transmission connection with the speed reducer (2), the outer wall of the circumference of the conveying cylinder (5) is sleeved with a fixing ring (6), the bottoms of the fixing ring (6), the speed reducer (2) and the working motor (1) are respectively provided with a mounting frame (7), the conveying cylinder (5) is provided with a feed hopper (4) with an upward opening close to the upper end of the left side, the conveying cylinder (5) is provided with a discharge hopper (8) with a downward opening close to the lower end of the right side, the lower end of the discharge hopper (8) is connected with, the dredging anti-blocking device (9) comprises a scraping wing piece (12), a vertical rotating rod (13), a circular T-shaped sliding groove (14), a T-shaped sliding block (15), a connecting fixing rod (16), a vertical operating rod (17) and a reinforcing ring (18), wherein the reinforcing ring (18) is connected to the bottom of the discharge hopper (8) in a welding mode, the circular T-shaped sliding groove (14) with a downward opening is formed in the outermost side of the circumference of the reinforcing ring (18), the T-shaped sliding block (15) is embedded in the circular T-shaped sliding groove (14), the vertical operating rod (17) is connected to the lower end of the T-shaped sliding block (15), the vertical operating rod (17) is arranged outside the lower end of the reinforcing ring (18), the connecting fixing rod (16) is arranged on the outer wall of the left end of the upper side of the vertical operating rod (17), and the vertical rotating rod (13) is connected to the left end of the connecting fixing, the vertical rotating rod (13) penetrates through the reinforcing ring (18) and is arranged inside the discharging hopper (8), and the inner wall of the left side of the vertical rotating rod (13) is connected with a scraping wing piece (12).

2. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: carry a section of thick bamboo (5) about both ends center department inside all embedded have fixing bearing (11), carry pivot (3) through two fixing bearing (11) and carry a section of thick bamboo (5) fixed connection.

3. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: carry and be connected with auger delivery piece (10) from left right side on the inside transport pivot (3) circumference outer wall of a circle of section of thick bamboo (5), auger delivery piece (10) when carrying pivot (3) clockwise turning impels the direction to the right side, auger delivery piece (10) when carrying pivot (3) anticlockwise turning impels the direction to the left side, the circumference outer wall of auger delivery piece (10) all not laminate with the circumference inner wall of a section of thick bamboo (5).

4. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: fixed ring (6) are provided with four altogether, four fixed ring (6) all through welding and delivery cylinder (5) fixed connection, four fixed ring (6) keep the level parallel and level with mounting bracket (7) that reduction gear (2) and work motor (1) bottom are connected bottom.

5. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: the vertical rotating rod (13) and the inner wall of the circumference of the discharging hopper (8) are kept vertical and parallel, the vertical rotating rod (13) is arranged on one side of the circle center of the discharging hopper (8), and an anti-slip sleeve is further sleeved outside the circumference of the lower half section of the vertical operating rod (17) and used for operating anti-slip.

6. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: feeder hopper (4) and play hopper (8) all through screw and conveying cylinder (5) fixed connection, feeder hopper (4) and play hopper (8) all with conveying cylinder (5) inside intercommunication, it has waterborne paint to be used for anticorrosive rust-resistant to all coat on the outer wall of feeder hopper (4), conveying cylinder (5) and play hopper (8).

7. The screw conveying mechanism for the mud landing-free system according to claim 1, wherein: t type slider (15) accessible vertical action bars (17) drive do the circumference and slide in ring T type spout (14) inside, reinforcement ring (18) and play hopper (8) are through welded fastening connection, the circumference inner wall parallel and level of reinforcement ring (18) and play hopper (8).