Mobile water replenishment device and method for sand, gravel and rock dam filling materials

Abstract

The present invention provides a mobile water replenishment device and method for sand, gravel and stone dam filling materials. The mobile water replenishment device includes a vehicle body, a rolling and crushing component, a material turning bin, a material turning component, a filter screen, a water replenishment component and a material rake component; the vehicle body is used to move along a preset direction; the rolling and crushing component is connected to the vehicle body and is used to roll and crush the filling materials to form small-particle filling materials; the material turning bin is connected to the vehicle body and is arranged behind the rolling and crushing component along the preset direction; the material turning component is arranged in the material turning bin and is used to eject small-particle filling materials to the rear of the preset direction; the filter screen is connected to the material turning bin and is used to receive the small-particle filling materials ejected by the material turning component; the water replenishment component is connected to the vehicle body and is used to spray high-pressure water toward the filter screen to turn the small-particle filling materials into water-containing small-particle filling materials; the material rake component is used to spread the water-containing small-particle filling materials. The present invention can realize sufficient water replenishment of the filling materials to improve the optimal moisture content of the filling materials.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and more specifically to a mobile water replenishment device and method for sand, gravel and rock dam filling materials. Background Art

[0002] In recent years, my country has built a large number of gravel dams in the southwest. Since the compaction degree of gravel filling materials is closely related to their water content, a large number of tests will be conducted before the project starts to determine the water content control index in the dam body filling, that is, the optimal water content. During filling, the water content must fluctuate around the optimal water content. However, the earth-rock dam has a large filling area. After a series of processes such as transportation and paving on the dam, the water in the earth and stone will evaporate, resulting in a water content lower than the optimal water content. The usual practice is to carry out water replenishment on the dam surface before compaction. In the prior art, water replenishment is generally achieved by manual spraying or water spraying by a sprinkler truck. The manual spraying method is inefficient; earth and stone materials are prone to agglomeration during transportation, and there will still be agglomeration after paving. The water sprayed by the sprinkler truck cannot be well combined with the inside of the agglomerated earth and stone materials, resulting in the water content after replenishment being actually lower than the optimal water content, resulting in poor water replenishment effect. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is that the existing manual water replenishment method is inefficient and the water replenishment effect of the sprinkler truck water replenishment method is not good.

[0005] (II) Technical solution

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a mobile water replenishing device for sand and gravel dam filling materials, which is used for replenishing water for filling materials with insufficient water content to form water-containing small-particle filling materials. The mobile water replenishing device comprises a vehicle body, a rolling and crushing component, a material turning bin, a material turning component, a filter screen and a water replenishing component; the vehicle body is used to move along a preset direction; the rolling and crushing component is connected to the vehicle body and is used to roll and crush the filling materials to form small-particle filling materials; the material turning bin is connected to the vehicle body, and the material turning bin is arranged behind the rolling and crushing component along the preset direction; the material turning component is arranged in the material turning bin, and the material turning component is used to project the small-particle filling materials to the rear of the preset direction; the filter screen is connected to the material turning bin, and the filter screen is used to receive the small-particle filling materials projected by the material turning component; the water replenishing component is connected to the vehicle body, and the water replenishing component is used to spray high-pressure water toward the filter screen to turn the small-particle filling materials into water-containing small-particle filling materials.

[0008] Preferably, the material turning assembly also includes a first rotating shaft, a material turning part, a second rotating shaft, a first driving part and a second driving part, the first rotating shaft is rotatably connected to the material turning bin, a plurality of the material turning parts are arranged at intervals on the first rotating shaft, the filter is rotatably connected to the material turning bin through the second rotating shaft, the output end of the first driving part is connected to the first rotating shaft, the output end of the second driving part is connected to the second rotating shaft, and the material turning part is used to project the small-particle filling material onto the filter.

[0009] Preferably, the material turning portion includes a first material turning tooth and a second material turning tooth connected to the first rotating shaft, the first material turning tooth has a first bending portion toward the first end of the first rotating shaft, and the second material turning tooth has a second bending portion toward the second end of the first rotating shaft.

[0010] Preferably, there are a plurality of the first material turning teeth, and a plurality of the second material turning teeth, and the plurality of the first material turning teeth and the plurality of the second material turning teeth are staggered along the circumferential direction of the first rotating shaft.

[0011] Preferably, the water replenishment component includes a water storage tank, a pipe and a plurality of nozzles; the water storage tank is connected to the vehicle body, the pipes respectively connect the water storage tank and the plurality of nozzles, the plurality of nozzles are arranged in the material turning bin and are all arranged downward toward the filter.

[0012] Preferably, it also includes a rake assembly, which is connected to the vehicle body and is arranged behind the tipping bin along the preset direction. The rake assembly is used to spread the water-containing small-particle filling material.

[0013] Preferably, the raking assembly comprises a raking plate and a flat plate, both of which are connected to the vehicle body, the raking plate has a plurality of raking teeth arranged at intervals, and the flat plate is arranged behind the raking plate along the preset direction.

[0014] Preferably, it also includes an atomizing assembly, which is connected to the vehicle body and is used to spray water mist into the air above the filling material.

[0015] Preferably, the rolling and crushing assembly comprises a rolling roller and a third driving unit, the rolling roller is rotatably connected to the vehicle body, the output end of the third driving unit is connected to the rolling roller, and the rolling roller is provided with a plurality of protrusions at circumferential intervals.

[0016] Preferably, the vehicle body includes a front end, a front wheel track assembly, a frame and a rear wheel assembly, the front end is connected to one end of the frame, the rear wheel assembly is connected to the other end of the frame, and the front wheel track assembly is arranged at the bottom of the front end.

[0017] In a second aspect, the present invention further provides a method for mobile water replenishment of sand, gravel and rock dam filling materials, which is implemented based on the mobile water replenishment device for sand, gravel and rock dam filling materials described in any one of the above technical solutions, and the mobile water replenishment method comprises the following steps:

[0018] The vehicle body moves along a preset direction on the area to be compacted;

[0019] The rolling and crushing component rolls and crushes the filling material in the front of the preset direction to form small particles of filling material;

[0020] The material turning component turns the small-particle filling material out and projects it onto the filter screen, and the water replenishing component sprays high-pressure water toward the filter screen to turn the small-particle filling material into water-containing small-particle filling material, which falls from the filter screen to the area to be compacted under the impact force of the water flow.

[0021] (III) Beneficial effects

[0022] The above technical solution of the present invention has at least the following advantages:

[0023] 1. In the present invention, the rolling and crushing component rolls and crushes the filling material in front of the preset direction to form small-particle filling material to increase the specific surface area of ​​the filling material. The turning component turns the small-particle filling material out and ejects it onto the filter screen. The water replenishment component sprays high-pressure water toward the filter screen. The high-pressure water impacts the filter screen to form a tiny water mist, which increases the specific surface area of ​​the water. The water mist is then combined with the small-particle filling material, further improving the combination effect of water and filling material, making the water replenishment more uniform and sufficient. During the rolling process of the coarse-grained filling material, as the coarse-grained filling material is crushed, the content of small-particle filling material continues to increase, the small-particle filling material is fully combined with water, and the optimal moisture content is also improved. During the working process, the turning bin can isolate the radiant heat of the sun and prevent the water sprayed by the water replenishment component from evaporating into the environment to ensure the water replenishment effect.

[0024] 2. In the present invention, the filter is rotatably connected to the material turning bin through the second rotating shaft. After working for a period of time, the second driving part can drive the second rotating shaft to rotate, thereby realizing the flipping of the filter, so as to pour the large-sized filling material above the filter onto the ground. Under the impact force of the high-pressure water sprayed by the water replenishment component, the large-sized filling material can be separated from the filter, and the filter can be cleaned. That is, the high-pressure water sprayed by the water replenishment component can also be used to clean the filter, prevent the filter from being blocked, and ensure the smooth progress of the working process.

[0025] 3. In the present invention, the first material turning tooth has a first bending portion facing the first end of the first rotating shaft, and the second material turning tooth has a second bending portion facing the second end of the first rotating shaft. The bending directions of the first bending portion and the second bending portion are opposite, so that the small-particle filling materials are ejected in different directions, thereby preventing the small-particle filling materials from piling up in the same direction, helping the small-particle filling materials to be fully dispersed and combined with the water sprayed by the water replenishment component, thereby improving the uniformity of water replenishment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a mobile water replenishment device for sand, gravel and stone dam filling materials provided in an embodiment of the present invention.

[0028] Figure 2 It is one of the structural schematic diagrams of the material turning assembly provided in the embodiment of the present invention.

[0029] Figure 3 This is the second structural schematic diagram of the material turning assembly provided in an embodiment of the present invention.

[0030] Figure 4 It is a schematic structural diagram of a first material turning tooth and a second material turning tooth provided in an embodiment of the present invention.

[0031] The reference numerals in the figures are:

[0032] 1. Vehicle body; 2. Rolling and crushing assembly; 3. Material turning bin; 4. Material turning assembly; 5. Filter; 6. Water supply assembly; 7. Material raking assembly; 8. Atomization assembly; 11. Vehicle head; 12. Front wheel track assembly; 13. Vehicle frame; 14. Rear wheel assembly; 21. Rolling roller; 41. First rotating shaft; 42. Material turning part; 43. Second rotating shaft; 411. First end; 412. Second end; 421. First material turning tooth; 422. Second material turning tooth; 4211. First bending part; 4221. Second bending part; 61. Water storage bin; 62. Sprinkler; 71. Material raking plate; 72. Flat plate; 711. Raking teeth. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

[0037] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4As shown, an embodiment of the present invention provides a mobile water replenishing device for sand and gravel dam filling materials, which is used to replenish water for filling materials with insufficient water content to form water-containing small-particle filling materials. The mobile water replenishing device includes a vehicle body 1, a rolling and crushing component 2, a material turning bin 3, a material turning component 4, a filter screen 5 and a water replenishing component 6; the vehicle body 1 is used to move along a preset direction; the rolling and crushing component 2 is connected to the vehicle body 1, and is used to roll and crush the filling materials to form small-particle filling materials; the material turning bin 3 is connected to the vehicle body 1, and the material turning bin 3 is arranged at the rear of the rolling and crushing component 2 along the preset direction; the material turning component 4 is arranged in the material turning bin 3, and the material turning component 4 is used to project small-particle filling materials to the rear in the preset direction; the filter screen 5 is connected to the material turning bin 3, and the filter screen 5 is used to receive the small-particle filling materials projected by the material turning component 4; the water replenishing component 6 is connected to the vehicle body 1, and the water replenishing component 6 is used to spray high-pressure water toward the filter screen 5 to The small-particle filling material is changed into a water-containing small-particle filling material; during the working process, the turning bin 3 can prevent the water sprayed by the water replenishment component 6 from evaporating into the environment to ensure the water replenishment effect; specifically, the turning bin 3 is preferably made of a heat-conducting material, and a cooling system can also be set on the turning bin 3. The cooling system includes a refrigerant conveying device (or a heat exchange component) and a cooling pipeline. The cooling pipeline is arranged on the surface of the turning bin 3, and the refrigerant conveying device is connected to the cooling pipeline. The refrigerant conveying device is used to convey a refrigerant (low-temperature water or low-temperature oil, etc.) into the cooling pipeline to realize the cooling of the turning bin 3. The cooled turning bin 3 can block the heat of the sun to avoid the evaporation of water in the water replenishment area caused by the radiant heat of the sun. At the same time, the mist in the turning bin 3 will condense on the inner wall surface of the cooled turning bin 3 to form water droplets that fall into the water replenishment area, thereby further improving the water replenishment effect. Alternatively, in another embodiment, the turning bin 3 is preferably made of a heat-insulating material to isolate the radiant heat of the sun as much as possible.

[0038] In one embodiment, the material turning assembly 4 also includes a first rotating shaft 41, a material turning part 42, a second rotating shaft 43, a first driving part (not shown) and a second driving part (not shown), the first rotating shaft 41 is rotatably connected to the material turning bin 3, a plurality of material turning parts 42 are arranged at intervals on the first rotating shaft 41, the filter screen 5 is rotatably connected to the material turning bin 3 through the second rotating shaft 43, the output end of the first driving part is connected to the first rotating shaft 41, the output end of the second driving part is connected to the second rotating shaft 43, and the material turning part 42 is used to project small-particle filling material onto the filter screen 5. The material turning part 42 throws the small-particle filling material onto the filter screen 5. The small-particle filling material collides with the filter screen 5. The agglomerated small-particle filling material can be further dispersed under the action of the impact force. The water replenishment component 6 is used to spray high-pressure water toward the filter screen 5. The impact force generated by the high-pressure water acting on the filter screen 5 can blast the agglomerated small-particle filling material and make it fully dispersed. At the same time, the high-pressure water impacting the filter screen will form tiny water mist, which increases the surface area of ​​the water. The water mist is combined with the small-particle filling material, which further enhances the water binding effect and makes the water replenishment more uniform and sufficient. In order to prevent some particles from being unable to disperse and larger particles from clogging the filter 5, the filter 5 is rotatably connected to the tipping bin 3 via the second rotating shaft 43. After working for a period of time, the second driving unit can drive the second rotating shaft 43 to rotate, thereby realizing the flipping of the filter 5, so as to pour the large-sized filling material above the filter 5 onto the ground. Under the impact force of the high-pressure water sprayed by the water replenishment component 6, the large-sized filling material can be separated from the filter 5, and the filter 5 can be cleaned. Specifically, the second driving unit can be electrically connected to the corresponding control system module. After the tipping component 4 works for a period of time, the second driving unit is started at a fixed time to drive the filter 5 to flip.

[0039] In one embodiment, the material turning part 42 includes a first material turning tooth 421 and a second material turning tooth 422 connected to the first rotating shaft 41, the first material turning tooth 421 has a first bending part 4211 facing the first end 411 of the first rotating shaft 41, and the second material turning tooth 422 has a second bending part 4221 facing the second end 412 of the first rotating shaft 41. The bending directions of the first bending part 4211 and the second bending part 4221 are opposite, so that the small-particle filling material is ejected in different directions, thereby preventing the small-particle filling material from piling up in the same direction, helping the small-particle filling material to be fully dispersed and combined with the water sprayed by the water replenishing component 6, thereby improving the uniformity of water replenishment.

[0040] In one embodiment, there are a plurality of first material turning teeth 421 and a plurality of second material turning teeth 422, and the plurality of first material turning teeth 421 and the plurality of second material turning teeth 422 are staggeredly arranged along the circumference of the first rotating shaft 41. The plurality of first material turning teeth 421 and the plurality of second material turning teeth 422 rotate rapidly to turn over the filling material in the area to be compacted and project it onto the filter screen 5.

[0041] In one embodiment, the water replenishment assembly 6 includes a water storage tank 61, a pipeline (not shown) and a plurality of nozzles 62; the water storage tank 61 is connected to the vehicle body 1, and the pipelines respectively connect the water storage tank 61 and the plurality of nozzles 62, and the plurality of nozzles 62 are arranged in the material turning bin 3 and are all arranged downward toward the filter screen 5. A water pump is arranged in the water storage tank 61, and the water pump pumps the water in the water storage tank to the plurality of nozzles 62 through the pipeline and sprays it out in a high-pressure state.

[0042] In one of the embodiments, a rake component 7 is further included. The rake component 7 is connected to the vehicle body 1 and is arranged behind the tipping bin 3 along a preset direction. The rake component 7 is used to spread water-containing small-particle filling materials.

[0043] In one embodiment, the raking assembly 7 includes a raking plate 71 and a flat plate 72, both of which are connected to the vehicle body 1, the raking plate 71 has a plurality of raking teeth 711 arranged at intervals, and the flat plate 72 is arranged behind the raking plate 71 along a preset direction. The raking plate 71 is used to rake the accumulated water-containing small-particle filling materials, and the flat plate 72 is used to level the surface of the water-containing small-particle filling materials to facilitate the next step of compaction.

[0044] In one embodiment, it also includes an atomizing assembly 8, which is connected to the vehicle body 1 and is used to spray water mist into the air above the filling material. When construction is carried out on a hot sunny day, the atomizing assembly 8 can be started to spray water mist into the air above the filling material. The water mist will absorb the heat of the atmosphere to achieve cooling of the environment. At the same time, the formed water mist environment can reflect sunlight to prevent sunlight from directly irradiating the filling material area after water replenishment, so as to reduce the evaporation of water in the filling material area after water replenishment, thereby keeping the moisture content in the filling material area within the optimal range.

[0045] In one embodiment, the rolling and crushing assembly 2 includes a rolling roller 21 and a third driving unit (not shown), the rolling roller 21 is rotatably connected to the vehicle body 1, the output end of the third driving unit is connected to the rolling roller 21, and the rolling roller 21 is provided with a plurality of protrusions (not shown) at intervals in the circumferential direction. The rolling roller 21 can roll the agglomerated filling material (earth and stone material) into small-particle filling material, and the plurality of protrusions can increase the friction force on the surface of the rolling roller and increase the effect of extrusion and crushing.

[0046] It should be noted that, in this embodiment, the first drive unit, the second drive unit and the third drive unit are preferably motors, and their specific connection structure can be that the output end of the motor is directly connected to the corresponding structure, or is connected to the corresponding structure through a gear set or a pulley set.

[0047] In one embodiment, the vehicle body 1 includes a front end 11, a front wheel track set 12, a frame 13 and a rear wheel set 14, the front end 11 is connected to one end of the frame 13, the rear wheel set 14 is connected to the other end of the frame 13, and the front wheel track set 12 is arranged at the bottom of the front end 11. Specifically, the front wheel track set 12 has a starting system that can drive the front wheel track set 12 to move, and the starting system can drive the front wheel track set 12 to rotate, thereby realizing the movement of the vehicle body 1. The front wheel track set 12 has better moving stability on mountainous terrain.

[0048] The embodiment of the present invention further provides a method for mobile water replenishment of sand, gravel and rock dam filling materials, which is implemented based on a mobile water replenishment device for sand, gravel and rock dam filling materials in any one of the above technical solutions. The mobile water replenishment method comprises the following steps:

[0049] The vehicle body 1 moves along a preset direction on the area to be compacted;

[0050] The rolling and crushing component 2 rolls and crushes the filling material in the front of the preset direction to form small particles of filling material;

[0051] The turning component 4 turns the small-grain filling material out and ejects it onto the filter screen 5, and the water replenishing component 6 sprays high-pressure water toward the filter screen 5 to turn the small-grain filling material into water-containing small-grain filling material. The water-containing small-grain filling material falls from the filter screen 5 to the area to be compacted under the impact force of the water flow;

[0052] The raking assembly 7 spreads the water-containing small-particle filling material in the area to be compacted.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mobile water replenishment device for sand, gravel and rock dam filling materials, characterized in that: Used to replenish water to filling materials with insufficient moisture content to form small-particle filling materials containing water. The mobile water replenishing device includes: A vehicle body, used for moving in a preset direction; A rolling and crushing assembly is connected to the vehicle body and is used for rolling and crushing the filling material to form small-particle filling material; A material turning bin connected to the vehicle body, the material turning bin being arranged behind the rolling and crushing assembly along the preset direction; A material turning assembly is arranged in the material turning bin, and is used to eject the small-particle filling material to the rear in a preset direction; A filter screen is connected to the material tipping bin, and is used to receive small particles of filling material ejected by the material tipping assembly; A water replenishing component is connected to the vehicle body and is used to spray high-pressure water toward the filter screen to convert the small-particle filling material into water-containing small-particle filling material. The water-containing small-particle filling material falls from the filter screen to the area to be compacted under the impact force of the water flow.

2. The sand and gravel dam filling material moving water replenishment device according to claim 1, characterized in that: The material turning assembly also includes a first rotating shaft, a material turning part, a second rotating shaft, a first driving part and a second driving part. The first rotating shaft is rotatably connected to the material turning bin. A plurality of the material turning parts are arranged at intervals on the first rotating shaft. The filter is rotatably connected to the material turning bin via the second rotating shaft. The output end of the first driving part is connected to the first rotating shaft, and the output end of the second driving part is connected to the second rotating shaft. The material turning part is used to project the small-particle filling material onto the filter.

3. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 2, characterized in that: The material turning portion includes a first material turning tooth and a second material turning tooth connected to the first rotating shaft, the first material turning tooth has a first bending portion facing the first end of the first rotating shaft, and the second material turning tooth has a second bending portion facing the second end of the first rotating shaft.

4. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 3, characterized in that: There are a plurality of the first material turning teeth, and a plurality of the second material turning teeth. The plurality of the first material turning teeth and the plurality of the second material turning teeth are staggered along the circumferential direction of the first rotating shaft.

5. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 1, characterized in that: The water replenishment component includes a water storage tank, a pipeline and a plurality of nozzles; the water storage tank is connected to the vehicle body, the pipeline respectively connects the water storage tank and the plurality of nozzles, and the plurality of nozzles are arranged in the material turning bin and are all arranged downward toward the filter.

6. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 1, characterized in that: It also includes an atomizing assembly, which is connected to the vehicle body and is used for spraying water mist into the air above the filling material.

7. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 1, characterized in that: It also includes a rake component, which is connected to the vehicle body and is arranged behind the tipping bin along the preset direction. The rake component is used to spread the water-containing small-particle filling material.

8. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 7, characterized in that: The raking assembly comprises a raking plate and a flat plate, both of which are connected to the vehicle body, the raking plate has a plurality of raking teeth arranged at intervals, and the flat plate is arranged behind the raking plate along the preset direction.

9. The sand-pebble-gravel dam filling material moving water replenishment device according to claim 1, characterized in that: The vehicle body comprises a front end, a front wheel track assembly, a frame and a rear wheel assembly. The front end is connected to one end of the frame, the rear wheel assembly is connected to the other end of the frame, and the front wheel track assembly is arranged at the bottom of the front end.

10. A method for replenishing water by moving sand, gravel and rock dam filling materials, characterized in that: Based on the mobile water replenishment device for sand, gravel and gravel dam filling materials according to any one of claims 1 to 9, the mobile water replenishment method comprises the following steps: The vehicle body moves along a preset direction on the area to be compacted; The rolling and crushing component rolls and crushes the filling material in the front of the preset direction to form small particles of filling material; The material turning component turns the small-particle filling material out and projects it onto the filter screen, and the water replenishing component sprays high-pressure water toward the filter screen to turn the small-particle filling material into water-containing small-particle filling material, which falls from the filter screen to the area to be compacted under the impact force of the water flow.

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