Green's sewage purification treatment system
Technical Field
The invention belongs to the technical field of sewage purification, and particularly relates to a green and environment-friendly sewage purification treatment system.
Background
Domestic sewage is wastewater discharged in daily life of residents and mainly comes from residential buildings and public buildings, such as houses, institutions, schools, hospitals, shops, public places, industrial enterprise toilets and the like; with the deepening of the awareness of water conservation, people usually use washing water to flush toilets or irrigate crops, so that water sources are fully utilized.
In the existing sewage purification system, sewage needs to be subjected to precipitation treatment, and then precipitated water is absorbed; simultaneously scraping sludge deposited at the bottom of the water; but cause the secondary to mix easily when scraping off mud among the prior art, reduced the effect of sewage deposit.
Disclosure of Invention
The invention provides a green and environment-friendly sewage purification treatment system in order to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the device comprises a main body, water inlet bins arranged on two side walls of the main body, a water suction pipe arranged at the upper end of the main body, a penetration device arranged in the main body, a mud scraping device arranged at the bottom of the main body, and filtering devices arranged on two inner side walls of the main body; the sludge passing and scraping device comprises a driving groove arranged at the bottom of the main body, a driving gear arranged in the driving groove, a chain arranged on the driving gear, a sludge collecting box arranged on the chain, a collecting cylinder arranged on the sludge collecting box, a guide plate arranged on the side wall of the sludge collecting box, a sludge scraping plate arranged at the lower end of the sludge collecting box, an inlet arranged at one side of the collecting cylinder, an outlet arranged at the other side of the collecting box, a fan wheel arranged in the collecting cylinder, a rack arranged on the inner wall of the main body, a large gear arranged on the collecting cylinder, a gear ring arranged on the inner wall of the collecting cylinder, a small gear arranged at the end part of the fan wheel, a transmission gear arranged on the inner wall of the collecting cylinder and a sludge discharging mechanism arranged on the sludge collecting box; the cross section of the driving groove is rectangular, the longitudinal section of the driving groove is concave, and the driving groove is arranged on the bottom wall of the main body; the two gears are arranged, one of the two gears is provided with a motor and can be rotatably embedded in the driving groove; the chain is connected with the two gears; the mud gathering box is arranged on the chain and movably positioned on the driving groove; the collecting cylinder is fixedly arranged at the front end of the sludge collecting box; the longitudinal section of the guide plate is arc-shaped and is fixedly arranged on the collecting cylinder; the mud scraping plate is arranged at the lower end of the collecting cylinder and can be abutted against the bottom of the main body; the inlet is arranged on the collecting cylinder and is aligned with the mud scraping plate; the outlet is aligned with the mud gathering box; the fan wheel is rotatably embedded in the collecting cylinder; the rack is arranged on the inner wall of the main body; the large gear is rotatably embedded on the collecting cylinder and can be meshed with the rack; the gear ring is arranged on the inner wall of the collecting cylinder; the pinion is arranged on the fan wheel and can be meshed with the transmission gear; the transmission gear is rotatably embedded on the inner wall of the collecting cylinder and can be respectively meshed with the gear ring and the pinion.
Discharging sewage into a filtering device through a water inlet bin, and firstly pretreating the sewage; then the pretreated sewage flows into the main body to start precipitation, and then the driving gear is started to drive the chain to start as time goes on; thereby driving the mud gathering box to start moving at the bottom of the main body; then the mud scraper scrapes the mud at the bottom of the main body; under the action of the special shape of the mud scraping plate, the sludge moves upwards; at the moment, when the mud collecting box moves, the large gear is meshed with the rack to start rotating; the transmission gear starts to drive the pinion to start rotating; then the fan wheel starts to rotate, and at the moment, sludge is sucked into the collecting cylinder from the inlet; further pushing the sludge to an outlet to discharge into a sludge gathering box along with the rotation of the fan wheel; thereby realizing the scraping of the sludge at the bottom of the main body; when the mud collecting box finishes moving, resetting is started; at the moment, the bottom of the sludge gathering box drives a sludge discharge mechanism to be started, and sludge in the sludge gathering box is discharged; after the sewage is settled for a period of time, the water quality on the sewage becomes clear, the water suction pipe is started to suck clear water, and the sewage is secondarily filtered by the filtering device while being sucked; the sewage enters from the side of the main body through the arrangement of the water inlet bin, so that the speed of filling the main body is increased, and the sinking effect is improved; on the other hand, the sewage treatment device can effectively prevent the sewage from being mixed with clean water, and further improves the sewage purification effect; the arrangement of the penetration device can realize secondary filtration when absorbing the water after the precipitation is finished, thereby further ensuring the water quality; due to the arrangement of the mud scraping device, on one hand, mud at the bottom of the main body is scraped, and the sewage purification effect is improved; on the other hand, secondary pollution is realized during sludge scraping, and the sewage purification effect is further improved; the sewage can be pretreated before being precipitated through the filtering device, and large impurities in the sewage are removed, so that the effect of sewage precipitation treatment is improved; further improving the sewage purification effect; the driving gear and the chain are arranged, so that the mud collecting box can move, and the mud scraping effect is improved; on the other hand, the accuracy of transmission can be ensured in a dirty environment; the sludge is collected during sludge scraping through the arrangement of the sludge collection box, so that the sludge is prevented from being mixed with water again to influence the sedimentation effect; the arrangement of the guide plate can further prevent the sludge from being mixed with the clear water, thereby improving the sewage purification effect; the arrangement of the fan wheel realizes the active absorption of the scraped sludge into the sludge gathering box; further improving the effect of sewage precipitation; the arrangement of the rack and the large gear realizes that the fan wheel is driven to rotate when the sludge collecting box moves, so that sludge is more uniformly sucked; the stability of scraping mud is improved, prevents that mud from blockking up the import.
The sludge discharging mechanism comprises a turning plate arranged at the rear end of the sludge gathering box, a turning plate torsion spring arranged on the turning plate, a support rod arranged on the sludge gathering box, a support rod spring arranged on the support rod, a collection box arranged at the bottom of the main body, a stretching door arranged on the collection box, a top block arranged on the stretching door and a top block spring arranged on the top block; one end of the turning plate is embedded in the inner wall of the mud gathering box in a turnover way; the turnover plate torsion spring is connected with the turnover plate and the inner wall of the mud collecting box; one end of the propping rod is connected with the turning plate, and the other end of the propping rod can prop against the inner wall of the main body; the supporting rod spring is arranged on the supporting rod in a looped mode and can be abutted against the inner wall of the mud collecting box and the turning plate respectively; the cross section of the collecting box is rectangular and is fixedly arranged at the bottom end of the main body; the stretching door is foldable and embedded at one end of the collecting box; the top block is arranged at the upper end of the stretching door and can be abutted against the mud gathering box; the top block spring is connected with the top block and the collecting box.
When the resetting of the mud gathering box is finished, firstly, the mud gathering box is abutted against the top block; then the stretching door is driven to open, and the bottom of the sludge collecting box is butted with the upper end of the collecting box at the moment; the further support rod is supported against the inner wall of the main body and then drives the turning plate to turn over; at the moment, the sludge in the sludge gathering box is discharged into the collecting box; the mud gathering box is sealed by the arrangement of the turning plate, so that the mud in the mud gathering box is prevented from entering water again, and the mud scraping stability is improved; on the other hand, the sludge in the sludge gathering box can be stirred during sludge discharge, so that the sludge discharge fluency is improved; the limit of the turning plate is realized through the arrangement of the supporting rod and the supporting rod spring, the automatic rotation of the turning plate caused by the action of water pressure is prevented, and the stability of mud scraping is reduced; on one hand, the collection box is sealed by the arrangement of the stretching door, so that water and sludge are separated; on the other hand can in time dock with gathering the mud bottom when opening for in time to the sealed of collecting box when row's mud, further improved the stability of arranging mud.
The filtering device comprises a filtering chamber arranged on the side wall of the main body, a water permeable hole arranged on one side of the filtering chamber, a rotating roller arranged in the filtering chamber, three filtering plates arranged on the rotating roller, a plurality of groups of sieving mechanisms arranged on the filtering plates, a ratchet ring arranged on the main body, a ratchet wheel arranged on the rotating roller, three buckles arranged on the inner wall of the main body, buckle torsional springs arranged on the buckles, and a positioning block arranged on the rotating roller; the longitudinal sections of the filter cavities are circular, and two filter cavities are arranged and are respectively positioned on two side walls of the main body; the water permeable holes are arranged on the inner wall of the filtering cavity and are positioned on the filtering cavity close to one side in the main body; the rotating roller is rotatably embedded on the filter cavity; the filter plates are provided with three blocks which are uniformly arranged along the circumferential direction of the rotating roller; the ratchet is annularly arranged on the inner wall of the filtering cavity; the ratchet wheel is arranged on the rotating roller and can be meshed with the ratchet ring; three buckles are arranged and can be embedded on the inner wall of the filtering cavity in a turnover way; the bayonet torsion spring is connected with the buckle and the inner wall of the filter cavity; the locating piece is equipped with three, evenly arranges along the circumferencial direction of rotatory roller, can detain mutually with the buckle.
When sewage enters the filter cavity from the water inlet cavity, firstly, water can be in between the two filter plates; at the moment, a sieving mechanism on the vertical filter plate blocks large-particle garbage in the sewage, and water passes through the filter plate and enters the main body through the water permeable holes; when the garbage in the filtering cavity is accumulated slowly, the positioning block is disengaged from the buckle due to the change of the water pressure; further driving the rotating roller to rotate, so that the filter plate rotates anticlockwise, and the garbage on the original filter plate is poured into the collection box; the main body can be separated through the arrangement of the filter cavity, so that the pretreated water and the precipitated water are prevented from being mixed to influence the precipitation effect; the sewage can be blocked by the arrangement of the filter plate, so that the pretreatment effect is realized; meanwhile, the garbage can be collected according to the changed water pressure, so that the efficiency of sewage treatment is realized; the bottom sinking effect is further improved; on one hand, the arrangement of the sieving component realizes that water can be filtered during sieving, and garbage can not pass through; on the other hand, when the water is filtered, the water is prevented from entering the collecting tank, so that the stability of sewage pretreatment is improved; the arrangement of the ratchet wheel and the ratchet ring can realize that the rotating roller can only rotate anticlockwise, so that the condition that the filtering plate rotates disorderly to influence the sieving effect due to the uncertainty of water pressure is prevented; the filter plate can generate resistance through the arrangement of the buckle and the buckle torsional spring, so that the filter plate can drive the rotating roller to rotate according to the change of hydraulic pressure, and the sieving automation is improved; further improving the effect of sewage treatment.
The sieving mechanism comprises a plurality of sieve pores arranged on the filter plate, a plugging plate arranged on the sieve pores, a plugging torsion spring arranged on the plugging plate, a limiting plate arranged on the filter plate, a limiting spring arranged on the limiting plate, a positioning block arranged on the plugging plate, a groove arranged on the limiting plate and a positioning groove arranged on the limiting plate; a plurality of screening holes are arranged and are uniformly distributed on the side surface of the filtering plate; the blocking plate is embedded in the sieving hole in a turnover way; the blocking torsion spring is connected with the blocking plate and the inner wall of the sieving hole; the limiting plate can be transversely movably embedded on the filter plate; the limiting spring is connected with the limiting plate and the inner wall of the filter plate; the positioning block is fixedly arranged on the blocking plate and is positioned in the slot; the positioning groove is arranged on the limiting plate and is positioned in the groove; the slot is arranged on the limiting plate.
When the filter plate is used for sieving, the positioning block is positioned in the groove under the action of the limiting spring of the limiting plate; at the moment, water pressure can drive the blocking plate to turn over, so that water can flow through the sieving holes; when the filter plate rotates anticlockwise, the limiting plate abuts against the inner wall of the filter cavity and drives the limiting plate to move, so that the positioning block is embedded into the positioning groove, and the limiting of the blocking plate is realized; by the mechanism, when the sewage needs to be screened by the screening holes, the blocking plate is automatically opened, so that water can flow to the water permeable holes from the screening holes; the sieving effect is improved; on the other hand, the blocking plate can be limited by the movement of the limiting plate, so that water is prevented from entering the collecting box after the filter plate rotates; the pretreatment effect of the sewage is improved, and the sewage purification effect is further improved.
The infiltration device comprises a filter plate arranged in the main body, a filter hole arranged on the filter plate, an infiltration pipe arranged on the filter hole, an infiltration hole arranged on the side wall of the infiltration pipe, an infiltration ball arranged at the lower end of the filter hole, and a filter ball arranged in the infiltration ball; the filter plate is transversely arranged on the inner wall of the main body and is positioned below the water suction pipe; the filter holes are uniformly arranged on the surface of the filter plate; the longitudinal section of the filtering hole is an inverted triangle; the permeation tube is arranged on the filter hole; the longitudinal section of the upper end of the permeation tube is arc-shaped; the permeation holes are formed in the side wall of the permeation tube; the penetrating ball is arranged below the filtering hole, and the surface of the filtering hole is provided with a starting hole; the infiltration ball is arranged in the filtering ball.
Opening the water suction pipe to suck water, and then fully beating the water through the permeation balls and the filter balls to further filter stains in the water; then water enters the upper part of the filter plate through the permeation holes; the speed of water permeation is reduced through the arrangement of the filter holes, so that water is more fully contacted with the filter balls, and the water purification effect is improved; the water can come out from the side edge through the arrangement of the permeation holes, so that the water flow is thinner, and impurities in the water are effectively prevented from entering; the water can be fully contacted with the filtering ball through the arrangement of the penetrating ball, so that the filtering effect of the water is further improved; the device can filter the water for the second time before being absorbed, and filter the filth which is not deposited.
In conclusion, the invention has the following advantages: the structure is simple, and the sewage is purified in a precipitation mode, so that the environment is protected; the sewage can be purified through the permeation device, and the sewage treatment effect is improved; sludge deposited at the bottom of the main body can be timely scraped by the sludge scraping device, so that the sewage purification effect is improved; on the other hand, the sludge is mixed into the water again when the sludge is scraped, so that the sewage purification effect is improved; the water is firstly pre-purified when being purified by the filtering device, the effect of sewage sedimentation is improved, and the purifying effect of sewage is further improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a cross-sectional perspective view along a-a of fig. 2 of the present invention.
Fig. 5 is a cross-sectional view along a-a of fig. 2 of the present invention.
Fig. 6 is a cross-sectional view taken along B-B of fig. 3 of the present invention.
FIG. 7 is a cross-sectional perspective view of FIG. 3 taken along C-C of the present invention.
Fig. 8 is an exploded schematic view of a permeation mechanism of the present invention.
FIG. 9 is a partial view taken at A of FIG. 5 in accordance with the present invention.
Fig. 10 is a partial view of the invention at B in fig. 4.
Fig. 11 is a partial view of the invention at C of fig. 4.
Fig. 12 is a partial view of the invention at D in fig. 6.
Fig. 13 is a partial view of fig. 8 taken at E in accordance with the present invention.
Fig. 14 is a partial view of the invention at F in fig. 4.
Detailed Description
As shown in fig. 1-14, an environment-friendly sewage purification treatment system comprises a main body 1, a water inlet bin 2, a water suction pipe 3, a penetration device 4, a mud scraping device 5 and a filtering device 6; the over-mud scraping device 5 comprises a driving groove 51, a driving gear 52, a chain 53, a mud collecting box 54, a collecting cylinder 55, a guide plate 56, a mud scraping plate 57, an inlet 58, an outlet 59, a fan wheel 590, a rack 591, a large gear 592, a toothed ring 593, a small gear 594, a transmission gear 595 and a mud discharging mechanism 7; the main body 1 is made of concrete; the water inlet bin 2 is arranged on two side walls of the main body 1; the water suction pipe 3 is arranged at the upper end of the main body 1; the infiltration device 4 is arranged in the main body 1; the mud scraping device 5 is arranged at the bottom of the main body 1; the filtering devices 6 are arranged on two inner walls of the main body 1; the cross section of the driving groove 51 is rectangular, the longitudinal section of the driving groove is concave, and the driving groove is arranged on the bottom wall of the main body 1; two gears 52 are provided, wherein one gear 52 is provided with a motor and is rotatably embedded in the driving groove 51; the chain 53 connects the two gears 52; the mud gathering box 54 is arranged on the chain 53 and movably positioned on the driving groove 51; the collecting barrel 55 is fixedly arranged at the front end of the sludge gathering box 54; the longitudinal section of the guide plate 56 is arc-shaped and is fixedly arranged on the collecting cylinder 55; the mud scraper 57 is arranged at the lower end of the collecting cylinder 55, and the mud scraper 57 can be abutted against the bottom of the main body 1; the inlet 58 is arranged on the collecting cylinder 55 and is aligned with the scraper 57; the outlet 59 is aligned in the mud collection tank 54; the fan wheel 590 is rotatably embedded in the collecting cylinder 55; the rack 591 is arranged on the inner wall of the main body 1; the gearwheel 592 is rotatably embedded on the collecting barrel 55 and can be meshed with the rack 591; the gear ring 593 is arranged on the inner wall of the collecting barrel 55; the pinion 594 is disposed on the sector 590 and is engaged with the transmission gear 595; the transmission gear 595 is rotatably embedded on the inner wall of the collecting barrel 55 and can be respectively meshed with the toothed ring 593 and the pinion 594; the sludge discharging mechanism 7 is arranged on the sludge collecting box 54.
As shown in fig. 9-11, the mud discharging mechanism 7 comprises a flap 71, a flap torsion spring 72, a resisting rod 73, a resisting rod spring 74, a collecting box 75, an extension door 76, a top block 77 and a top block spring 78; one end of the turning plate 71 is embedded in the inner wall of the mud collecting box 54 in a turnover way; the turning plate torsion spring 72 is connected with the turning plate 71 and the inner wall of the mud collecting box 54; one end of the abutting rod 73 is connected with the turning plate 71, and the other end of the abutting rod can abut against the inner wall of the main body 1; the supporting rod spring 74 is annularly arranged on the supporting rod 73 and can be respectively abutted against the inner wall of the mud collecting box 54 and the turning plate 71; the cross section of the collecting box 75 is rectangular and is fixedly arranged at the bottom end of the main body 1; the stretching door 76 is foldable and embedded at one end of the collecting box 75; the top block 77 is arranged at the upper end of the stretching door 76 and can be abutted against the mud collecting box 54; the top block spring 78 connects the top block 77 and the collection tank 75.
As shown in fig. 6-7 and 12, the filtering device 6 comprises a filtering chamber 61, a water permeable hole 62, a rotating roller 63, a filtering plate 64, a sieving mechanism 8, a ratchet ring 65, a ratchet wheel 66, three buckles 67, a buckle torsion spring 68 and a positioning block 69; the longitudinal section of the filter cavity 61 is circular, and two filter cavities are arranged and are respectively positioned on two side walls of the main body 1; the water permeable holes 62 are arranged on the inner wall of the filter cavity 61 and are positioned on the filter cavity 61 close to one side in the main body 1; the rotating roller 63 is rotatably embedded in the filter cavity 61; the filter plates 64 are provided with three blocks which are uniformly arranged along the circumferential direction of the rotating roller 63; the ratchet ring 65 is arranged on the inner wall of the filter cavity 61; the screening mechanisms 8 are provided with a plurality of groups and are uniformly distributed along the surface of the filter plate 64; the ratchet wheel 66 is arranged on the rotating roller 63 and can be meshed with the ratchet ring 65; three buckles 67 are arranged and can be embedded on the inner wall of the filter cavity 61 in a turnover way; the bayonet torsion spring 68 is connected with the bayonet 67 and the inner wall of the filter cavity 61; the positioning blocks 69 are evenly arranged along the circumferential direction of the rotating roller 63 and can be buckled with the buckles 67.
As shown in fig. 8 and 13, the sieving mechanism 8 includes a sieving hole 81, a blocking plate 82, a blocking torsion spring 83, a limiting plate 84, a limiting spring 85, a positioning block 86, a slot 87, and a positioning slot 88; a plurality of screening holes 81 are uniformly arranged on the side surface of the filtering plate 64; the blocking plate 82 is embedded in the sieve holes 81 in a turnover manner; the blocking torsion spring 83 is connected with the blocking plate 82 and the inner wall of the sieving hole 81; the limit plate 84 can be transversely movably embedded on the filter plate 64; the limiting spring 85 is connected with the limiting plate 84 and the inner wall of the filter plate 64; the positioning block 86 is fixedly arranged on the blocking plate 82 and is positioned in the slot 87; the positioning groove 88 is arranged on the limiting plate 84 and is positioned in the groove 87; the slot 87 is opened on the limit plate 84.
As shown in fig. 14, the infiltration apparatus 4 includes an infiltration plate 41, a filtration hole 42, an infiltration pipe 43, an infiltration hole 44, an infiltration ball 45, and a filtration ball 46; the penetration plate 41 is transversely arranged on the inner wall of the main body 1 and is positioned below the water suction pipe 3; the filter holes 42 are provided in plurality and are uniformly arranged on the surface of the penetration plate 41; the longitudinal section of the filtering hole 42 is an inverted triangle; the penetration pipe 43 is arranged on the filter hole 42; the longitudinal section of the upper end of the permeation tube 43 is circular arc; the penetration holes 44 are opened on the side wall of the penetration pipe 43; the infiltration balls 45 are arranged below the filter holes 42, and the surface of each filter hole 42 is provided with a starting hole; the permeate ball 45 is disposed within the filter ball 46.
The specific implementation mode is as follows: sewage is discharged into the filtering device through the water inlet bin 2, and firstly, water is positioned between the two filtering plates 64; at the moment, the sieving mechanism on the vertical filtering plate 64 blocks large-particle garbage in the sewage, and water passes through the filtering plate 64 and enters the main body 1 through the water permeable holes 62; when the garbage in the filter cavity 61 is accumulated slowly, the positioning block 69 is separated from the buckle 67 due to the change of water pressure; further driving the rotating roller 63 to rotate, so that the filter plate rotates anticlockwise, and the garbage on the original filter plate 64 is poured into the collection box 75; when the filter plate 64 is screened, the limiting plate 84 is under the action of the limiting spring 85, and the positioning block 86 is positioned in the slot 87; at the moment, water pressure can drive the blocking plate 82 to turn over, so that water can flow through the sieving holes 81; when the filter plate 64 rotates anticlockwise, the limiting plate 84 abuts against the inner wall of the filter cavity 61, and the limiting plate 84 is driven to move, so that the positioning block 86 is embedded into the positioning groove 88, and the limiting of the blocking plate 82 is realized; the pretreated sewage flows into the main body 1 to start precipitation, and then the driving gear 52 is started to drive the chain 53 to start along with the lapse of time; thereby driving the mud collecting box 54 to start moving at the bottom of the main body 1; then the mud scraper 57 scrapes the mud at the bottom of the main body 1; under the action of the special shape of the mud scraper 57, the sludge moves upwards; at the moment, when the mud collecting box 54 moves, the large gear 592 is meshed with the rack 591 to start rotating; the pinion 594 begins to rotate through the transmission gear 595; the fan 590 is then started to rotate, while the sludge is sucked from the inlet 58 into the collection cylinder 55; further with the rotation of the fan 590, the sludge is pushed to the outlet 59 and discharged into the sludge collecting tank 54; thereby realizing the scraping of the sludge at the bottom of the main body 1; when the mud collecting box 54 finishes moving, resetting is started; first against the top block 77; then the stretching door 74 is driven to open, and the bottom of the sludge collecting box 54 is butted with the upper end of the collecting box 75; the further abutting rod 73 abuts against the inner wall of the main body 1 and then drives the turning plate 71 to turn over; at this time, the sludge in the sludge collecting tank 54 is discharged into the collecting tank; after further sewage is precipitated, the water suction pipe 3 is opened to suck water, and then the water is fully beaten by the permeation balls 45 and the filter balls 46 to further filter stains in the water; then, the water enters above the penetration plate 41 through the penetration holes 44; the water after precipitation is sucked.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics 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.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.