阅读说明：本技术 一种化工脱水机 (Chemical industry hydroextractor ) 是由 柳建凤 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种化工脱水机,涉及化工技术领域,其结构包括减震支撑架、底座传送皮带、电机支撑架、电机、脱水筒,底座为三角形,底座顶部的三个角分别安装有减震支撑架,三个减震支撑架之间安装有脱水筒,脱水筒的侧面设有电机支撑架,电机支撑架上安装有电机,电机通过传送皮带与脱水筒活动配合,本发明的有益效果：本发明通过在内胆顶部设置齿轮带动丝杆旋转,使螺母副带动清洗组件进行上升与下降,清洗组件底部两侧的钢丝刷与毛刷可以分别对筒体的内壁与内胆的外壁进行清理,钢丝刷为环状对筒体内壁上下的杂质膜刮擦,毛刷通过内胆的自旋转对杂质膜清理,凸块组和内胆凸块可以将清洗组件两侧的圆头活塞杆顶进。(The invention discloses a chemical dehydrator, which relates to the technical field of chemical industry and structurally comprises a damping support frame, a base conveying belt, a motor support frame, a motor and a dehydrating cylinder, wherein the base is triangular, the damping support frames are respectively arranged at three corners of the top of the base, the dehydrating cylinder is arranged between the three damping support frames, the motor support frame is arranged on the side surface of the dehydrating cylinder, the motor is arranged on the motor support frame, and the motor is movably matched with the dehydrating cylinder through the conveying belt, so that the chemical dehydrator has the beneficial effects that: according to the invention, the gear is arranged at the top of the liner to drive the screw rod to rotate, so that the nut pair drives the cleaning assembly to ascend and descend, the steel wire brushes and the hairbrushes on two sides of the bottom of the cleaning assembly can respectively clean the inner wall of the cylinder and the outer wall of the liner, the steel wire brushes scrape impurity films on the upper portion and the lower portion of the inner wall of the cylinder in an annular mode, the hairbrushes clean the impurity films through self-rotation of the liner, and the round head piston rods on two sides of the cleaning assembly can be pushed in by the convex block group and the inner liner convex block.)

1. The utility model provides a chemical industry hydroextractor, its structure is including shock attenuation support frame (1), base (2), conveyer (3), motor support frame (4), motor (5), dewatering cylinder (6), three shock attenuation support frame (1) is installed at base (2) top, it is three install dewatering cylinder (6) between shock attenuation support frame (1), dewatering cylinder (6) side is equipped with motor support frame (4), install motor (5) on motor support frame (4), motor (5) are through conveyer (3) and dewatering cylinder (6) clearance fit, its characterized in that:

the dewatering cylinder (6) comprises a cylinder body (61), a cleaning power group (62), a cylinder chassis (63), a chassis water outlet pipe (64), a main shaft (65), an inner container (66), an annular brush (x) and an annular steel wire brush (y), wherein the inner container (66) is arranged inside the cylinder body (61), the cleaning power group (62) is arranged between the inner container (66) and the cylinder body (61), the cleaning power group (62) is provided with two or more groups, the top of the cleaning power group (62) is matched with the inner container (66), one side of the cleaning power group (62) far away from the inner container (66) is connected with the inner wall of the cylinder body (61), the annular brush (x) penetrates through the inner container (66) and is in contact with the inner container (66), the annular brush (x) is connected with the cleaning power group (62), and the cleaning power group (62) is positioned between the annular brush (x) and the annular steel wire brush (y), the inner wall of the annular steel wire brush (y) is connected with the washing power group (62), the outer wall of the annular steel wire brush (y) is in contact with the inner wall of the barrel body (61), the main shaft (65) penetrates through the barrel chassis (63) to be in transition fit with the inner container (66), the main shaft (65) is in clearance fit with the barrel chassis (63), and a chassis water outlet pipe (64) is further fixed at the bottom of the barrel chassis (63).

2. The chemical dehydrator according to claim 1, wherein: wash power pack (62) including supporting disk (621), nut pair (622), washing subassembly (623), lead screw (624), gear (625), lead screw (624) from last run through in proper order in nut pair (622), supporting disk (621) and be connected with gear (625), inside supporting disk (621) is located to gear (625), lead screw (624) and supporting disk (621) clearance fit, lead screw (624) and nut pair (622) clearance fit, nut pair (622) and washing subassembly (623) fixed connection, supporting disk (621) link to each other with barrel (61) inner wall.

3. The chemical dehydrator according to claim 1, wherein: washing subassembly (623) including casing (231), stock solution chamber (232), spring (235), button head piston rod (236), No. two spring (237), ball (238), crowded water drum (239), the inside of casing (231) is equipped with stock solution chamber (232), the inside both ends in stock solution chamber (232) all are equipped with crowded water drum (239), crowded water drum (239) and button head piston rod (236) transition fit, the semicircle head of button head piston rod (236) is connected with casing (231) through spring (235), the inside of button head piston rod (236) is equipped with Y type passageway (234), two delivery port departments of Y type passageway (234) are equipped with shower nozzle (233), the one end of a spring (235) is kept away from to crowded water drum (239) is equipped with No. two spring (237), ball (238) have been inlayed to No. two spring (237).

4. The chemical dehydrator according to claim 3, wherein: the water squeezing barrel (239) is provided with a round hole matched with the round bead (238), the shell (231) is positioned between the annular hairbrush (x) and the annular steel wire brush (y), one side of the shell (231) is connected with the annular hairbrush (x), and the other side of the shell is connected with the annular steel wire brush (y).

5. The chemical dehydrator according to claim 2, wherein: the bottom of supporting disk (621) is equipped with shaft hole (a), supporting disk (621) be equipped with gear (625) clearance fit's arc opening (b), lead screw (624) run through in shaft hole (a) and be connected with gear (625).

6. The chemical dehydrator according to claim 1, wherein: the top of the inner container (66) is provided with a gear (661) meshed with the first gear (625), and one side of the inner container (66) is provided with an inner container lug (662).

Technical Field

The invention relates to the field of chemical industry, in particular to a chemical dehydrator.

Background

Chemical industry hydroextractor is three-legged pendulum formula structure, and the three-legged is inside all to be equipped with the spring and play the cushioning effect to its during operation, and the three-legged more stable that makes its operation, and inside main component is the inner bag, and the inner bag is covered with the aperture all around, and the motor passes through the conveyer belt and drives the inner bag and rotate, produces centrifugal force, and moisture is thrown away through the hole on the inner bag, flows through the delivery port at last.

Present chemical industry hydroextractor contains a large amount of impurity in the moisture during the dehydration, and centrifugal force gets rid of water through the hole on outside section of thick bamboo wall with the inner bag outer wall, and the dirty thing of a large amount of impurity is remained on section of thick bamboo wall and inner bag outer wall on time can form a rete for a long time, breed the bacterium, when chemical industry article dehydration, some garrulous membranes can run to the chemical industry article surface, need artifical clearance.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a chemical dehydrator to solve the problems that the existing chemical dehydrator contains a large amount of impurities in water during dehydration, water is thrown onto the outer cylinder wall and the outer wall of a liner through holes by centrifugal force, a film can be formed after a long time when a large amount of impurities are dirty and remain on the cylinder wall and the outer wall of the liner, bacteria are bred, and some broken films can run onto the surface of a chemical product during chemical product dehydration and need manual cleaning.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a chemical industry hydroextractor, its structure is including shock attenuation support frame, base, conveyer, motor support frame, motor, dehydration section of thick bamboo, the base is triangle-shaped, shock attenuation support frame, three are do not installed in the three minute at base top install the dehydration section of thick bamboo between the shock attenuation support frame, the side of dehydration section of thick bamboo is equipped with the motor support frame, install the motor on the motor support frame, the motor passes through conveyer and dehydration section of thick bamboo clearance fit.

Further elaborating, the dewatering cylinder comprises a cylinder body, a cleaning power set, a cylinder chassis, a chassis water outlet pipe, a main shaft, an inner container, an annular brush and an annular steel wire brush, wherein the inner container which is of a concentric circle structure is arranged in the cylinder body, the cleaning power set is arranged between the inner container and the cylinder body, two or more groups of cleaning power sets are arranged, the top of each cleaning power set is matched with the inner container, one side of each cleaning power set, far away from the inner container, is connected with the inner wall of the cylinder body, the annular brush penetrates through the inner container and is contacted with the inner container, the outer walls of two ends of the annular brush are connected with the cleaning power set, the cleaning power sets are positioned between the annular brush and the annular steel wire brush, the inner wall of the annular steel wire brush is connected with the cleaning power set, the outer wall of the annular steel wire brush is contacted with the inner wall of the cylinder body, the main shaft penetrates through the cylinder chassis and is in transition fit with the inner container, and the main shaft and the cylinder chassis adopt clearance fit, and a chassis water outlet pipe is also fixed at the bottom of the cylinder chassis.

Further elaboration, it is vice including supporting disk, nut, washing subassembly, lead screw, a gear to wash the power unit, the lead screw from the bottom from last run through in nut pair, supporting disk and gear connection No. one in proper order, inside the supporting disk was located to a gear, the lead screw adopts clearance fit with the supporting disk, lead screw and nut pair clearance fit, the nut is vice with washing subassembly fixed connection, the supporting disk is connected with the barrel inner wall.

Further elaboration, it has the ball to wash the subassembly including casing, stock solution chamber, shower nozzle, Y type passageway, a spring, button head piston rod, No. two springs, ball, crowded water drum, the inside of casing is equipped with the stock solution chamber, stock solution intracavity portion both ends all are equipped with crowded water drum, the piston transition fit of crowded water drum and button head piston rod, the semicircle head of button head piston rod is connected with the casing through a spring, the inside of button head piston rod is equipped with Y type passageway, two water outlets department of Y type passageway are equipped with the shower nozzle, the one end that a spring was kept away from to crowded water drum is equipped with No. two springs, No. two springs are inlayed the ball.

Stated further, the shell is located between the annular brush and the annular wire brush, one side of the shell is connected with the annular brush, and the other side of the shell is connected with the annular wire brush.

Further elaboration, the bottom of supporting disk is equipped with the shaft hole, one side that the barrel was kept away from to the supporting disk is equipped with the arc opening, the arc opening adopts clearance fit with a gear, the lead screw runs through in shaft hole and gear vertical connection No. one.

Further elaborating, the top of inner bag is equipped with the gear, gear and a gear mesh mutually, one side of inner bag is equipped with three inner bag lugs.

Further elaborating, the barrel inner wall is equipped with three group's convex block group side by side, and every group the convex block group is equipped with six lugs, six the lug is the equidistance formula and fixes the inner wall at the barrel.

Advantageous effects

The chemical dehydrator disclosed by the invention has the following beneficial effects:

according to the invention, the gear is arranged at the top of the liner to drive the screw rod to rotate, so that the nut pair drives the cleaning assembly to ascend and descend, the annular steel wire brush and the annular brush can respectively clean the inner wall of the cylinder and the outer wall of the liner, the annular steel wire brush scrapes impurity films on the upper portion and the lower portion of the inner wall of the cylinder, the annular brush cleans the impurity films through self-rotation of the liner, the round-head piston rods on two sides of the cleaning assembly can be pushed by the convex block group and the inner liner convex block, sodium bicarbonate liquid in the water squeezing cylinder is squeezed out to spray on the inner wall of the cylinder and the outer wall of the liner, so that the impurity films are decomposed, the inner wall of the cylinder and the outer wall of the liner are cleaned just by the annular steel wire brush, and thus thrown impurities and dirt cannot form impurity films, the broken films are remained on the surface of chemical articles to breed bacteria, and manual cleaning is not needed.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the detailed description of non-limiting embodiments with reference to the attached drawings.

FIG. 1 is a schematic structural diagram of a chemical dehydrator according to the present invention.

Figure 2 is a schematic cross-sectional view of the dewatering cylinder of the present invention.

FIG. 3 is a schematic view of the structure of the cleaning power set of the present invention cooperating with the annular brush and the annular wire brush.

FIG. 4 is a schematic diagram of a cleaning power pack according to the present invention.

FIG. 5 is a schematic view of the structure of the cleaning assembly of the present invention cooperating with the annular brush and the annular wire brush.

Fig. 6 is a schematic perspective view of the support disc of the present invention.

Fig. 7 is a schematic top view of the combination of the cylinder and the liner of the present invention.

The corresponding relation between the figure numbers and the component names in the figures is as follows: a shock-absorbing support frame-1, a base-2, a conveying belt-3, a motor support frame-4, a motor-5, a dewatering cylinder-6, a cylinder body-61, a cleaning power set-62, a cylinder base-63, a base plate water outlet pipe-64, a main shaft-65, an inner container-66, an annular brush-x, an annular steel wire brush-y, a support plate-621 and a nut pair-622, the cleaning component-623, the screw rod-624, the first gear-625, the shell-231, the liquid storage cavity-232, the spray head-233, the Y-shaped channel-234, the first spring-235, the round head piston rod-236, the second spring-237, the ball-238, the water squeezing barrel-239, the shaft hole-a, the arc opening-b and the gear-661.

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.

Example 1

As shown in fig. 1, the present invention provides a technical solution of a chemical dehydrator: its structure is including shock attenuation support frame 1, base 2, conveyer 3, motor support frame 4, motor 5, dehydration section of thick bamboo 6, base 2 is triangle-shaped, shock attenuation support frame 1, three are do not installed to the three angle at 2 tops of base install dehydration section of thick bamboo 6 between the shock attenuation support frame 1, the side of dehydration section of thick bamboo 6 is equipped with motor support frame 4, install motor 5 on the motor support frame 4, motor 5 passes through conveyer 3 and dehydration section of thick bamboo 6 clearance fit.

As shown in fig. 2-3, the dewatering cylinder 6 includes a cylinder 61, a cleaning power set 62, a cylinder base 63, a base plate water outlet pipe 64, a main shaft 65, an inner container 66, an annular brush x, and an annular wire brush y, the inner container 66 with a concentric structure is disposed inside the cylinder 61, the cleaning power set 62 is disposed between the inner container 66 and the cylinder 61, the cleaning power set 62 has two or more sets, the top of the cleaning power set 62 is matched with the inner container 66, one side of the cleaning power set 62 away from the inner container 66 is connected with the inner wall of the cylinder 61, the annular brush x penetrates the inner container 66 and contacts with the inner container, the outer walls of the two ends of the annular brush x are connected with the cleaning power set 62, the cleaning power set 62 is disposed between the annular brush x and the annular wire brush y, the annular brush x is disposed in the inner container 66 for cleaning, and the annular wire brush y is disposed in the inner wall of the cylinder 61 for cleaning, the inner wall of the annular steel wire brush y is connected with the washing power unit 62, the outer wall of the annular steel wire brush y is in contact with the inner wall of the cylinder body 61, the main shaft 65 penetrates through the cylinder bottom disc 63 to be in transition fit with the inner container 66, the main shaft 65 and the cylinder bottom disc 63 are in clearance fit, and a bottom disc water outlet pipe 64 is further fixed at the bottom of the cylinder bottom disc 63.

The inner wall of the cylinder body 61 is provided with three groups of convex block groups in parallel, each group of convex block groups is provided with six convex blocks 611, and the six convex blocks 611 are equidistantly fixed on the inner wall of the cylinder body 61.

As shown in fig. 2-4, the cleaning power unit 62 includes a supporting plate 621, a nut pair 622, a cleaning assembly 623, a screw rod 624, a first gear 625, the screw rod 624 sequentially penetrates through the nut pair 622, the supporting plate 621 is connected with the first gear 625 from bottom to top, the first gear 625 is disposed inside the supporting plate 621, the screw rod 624 and the supporting plate 621 adopt clearance fit, the screw rod 624 is movably fitted with the nut pair 622, the nut pair 622 is fixedly connected with the cleaning assembly 623, the supporting plate 621 is connected with the inner wall of the cylinder 61, and the supporting plate 621 is used for supporting the first gear 625 and the screw rod 624.

Example 2

As shown in fig. 1-7, the present invention provides a technical solution of a chemical dehydrator: its structure is including shock attenuation support frame 1, base 2, conveyer 3, motor support frame 4, motor 5, dehydration section of thick bamboo 6, base 2 is triangle-shaped, shock attenuation support frame 1, three are do not installed to the three angle at 2 tops of base install dehydration section of thick bamboo 6 between the shock attenuation support frame 1, the side of dehydration section of thick bamboo 6 is equipped with motor support frame 4, install motor 5 on the motor support frame 4, motor 5 passes through conveyer 3 and dehydration section of thick bamboo 6 clearance fit.

The dewatering cylinder 6 comprises a cylinder body 61, a cleaning power group 62, a cylinder chassis 63, a chassis water outlet pipe 64, a main shaft 65, an inner container 66, an annular brush x and an annular steel wire brush y, wherein the inner container 66 which is in a concentric circle structure is arranged inside the cylinder body 61, the cleaning power group 62 is arranged between the inner container 66 and the cylinder body 61, the cleaning power group 62 is provided with two or more groups, the top of the cleaning power group 62 is matched with the inner container 66, one side of the cleaning power group 62, which is far away from the inner container 66, is connected with the inner wall of the cylinder body 61, the annular brush x penetrates through the inner container 66 and is contacted with the inner container, the outer walls of two ends of the annular brush x are connected with the cleaning power group 62, the cleaning power group 62 is positioned between the annular brush x and the annular steel wire brush y, the inner wall of the annular steel wire brush y is connected with the cleaning power group 62, and the outer wall of the annular steel wire brush y is contacted with the inner wall of the cylinder body 61, the main shaft 65 penetrates through the cylinder base plate 63 to be in transition fit with the inner container 66, the main shaft 65 and the cylinder base plate 63 are in clearance fit, and a base plate water outlet pipe 64 is further fixed at the bottom of the cylinder base plate 63.

The inner wall of the cylinder body 61 is provided with three groups of convex block groups in parallel, each group of convex block groups is provided with six convex blocks 611, and the six convex blocks 611 are equidistantly fixed on the inner wall of the cylinder body 61.

Wash power pack 62 including supporting disk 621, the vice 622 of nut, washing subassembly 623, lead screw 624, a gear 625, lead screw 624 from last run through in proper order in the vice 622 of nut, supporting disk 621 and a gear 625 be connected down, a gear 625 is located inside the supporting disk 621, lead screw 624 and supporting disk 621 adopt clearance fit, lead screw 624 and the vice 622 clearance fit of nut, the vice 622 of nut and washing subassembly 623 fixed connection, supporting disk 621 is connected with barrel 61 inner wall, supporting disk 621 is used for supporting a gear 625 and lead screw 624.

The cleaning component 623 comprises a shell 231, a liquid storage cavity 232, a spray head 233, a Y-shaped channel 234, a first spring 235, a round-head piston rod 236, a second spring 237, a round-ball 238 and a water squeezing barrel 239, wherein the liquid storage cavity 232 is arranged inside the shell 231, the water squeezing barrel 239 is arranged at each of two ends inside the liquid storage cavity 232, the water squeezing barrel 239 is in transition fit with a piston of the round-head piston rod 236, a half head of the round-head piston rod 236 is connected with the shell 231 through the first spring 235, the Y-shaped channel 234 is arranged inside the round-head piston rod 236, the Y-shaped channel 234 prevents an inner container projection 662 and the projection 611 from ejecting the round-head piston rod 236 into the water squeezing barrel 239, the liquid inside can be sprayed out from the other end, the spray heads 233 are arranged at two water outlets of the Y-shaped channel 234, the spray head 233 enables one water flow to be divided into water flows for spraying the outer wall of the barrel body and the inner container, the second spring 237 is arranged at one end, which is far away from the first spring 235, of the water squeezing barrel 239, the second spring 237 is embedded with a ball 238.

The shell 231 is positioned between the annular hairbrush x and the annular steel wire brush y, one side of the shell 231 is connected with the annular hairbrush x, and the other side of the shell 231 is connected with the annular steel wire brush y.

The bottom of supporting disk 621 is equipped with shaft hole a, one side that barrel 61 was kept away from to supporting disk 621 is equipped with arc opening b, arc opening b adopts clearance fit with a gear 625, lead screw 624 runs through in shaft hole a and gear 625 vertical connection.

The top of inner bag 66 is equipped with gear 661, gear 661 meshes with a gear 625 mutually, one side of inner bag 66 is equipped with three inner bag lug 662, inner bag lug 662 is through the rotation of inner bag 66, three inner bag lug 662 is one row, and when washing subassembly 623 descends, rotatory inner bag lug 662 advances button head piston rod 236 top.

The bottom of the water squeezing barrel 239 is provided with a round hole, when the round hole extrudes the round-head piston rod 236, the round hole is blocked by the round bead 238 due to internal pressure, and liquid in the water squeezing barrel 239 is prevented from flowing out through the round hole.

The working principle is as follows: when the motor 5 is started, the main shaft 65 is rotated through the conveying belt 3 to drive the inner container 66 to rotate, the gear 661 on the inner container 66 is meshed with the first gear 625 to rotate through the arc-shaped opening b, the first gear 625 rotates to drive the screw rod 624 to rotate, so that the nut pair 622 is translated up and down, the nut pair 622 drives the cleaning component 623 to move up and down, the annular steel wire brush Y scrapes the barrel body 61 up and down, the inner container 66 is matched with the annular steel brush x through self-rotation to clean impurities, in the descending and ascending processes of the shell 231, the convex block 611 on the inner wall of the barrel body 61 pushes the round head piston rod 236 far away from one side of the inner container 66 into the first spring 235 behind the round head piston rod 236 inside the water squeezing barrel 239 to be squeezed and contracted, the round beads 238 inside the water squeezing barrel 239 are squeezed by water to seal the round hole inside the water squeezing barrel 239, so that the liquid can only pass through the Y-shaped channel 234, and the liquid inside the water squeezing barrel 239 forms a plurality of water flows out from the spray head 233 through the Y-shaped channel 234, and inner bag lug 662 on inner bag 66 will keep away from the inside rivers blowout of crowded water drum 239 of round head piston rod 236 top of barrel 61 one side through inner bag 66 autogyration, and when both sides do not have the lug to pass through, round head piston rod 236 does not receive external force to influence, and round head piston rod 236 is ejecting to spring 235, and No. two springs 237 pull back ball 238, and the negative pressure appears in crowded water drum 239 and absorbs water to stock solution chamber 232.

The invention solves the problems that the existing chemical dehydrator contains a large amount of impurities during dehydration, water is thrown onto the outer cylinder wall and the outer wall of the liner through holes by centrifugal force, a large amount of impurities remain on the cylinder wall and the outer wall of the liner for a long time to form a film to breed bacteria, some broken films can run onto the surface of the chemical during dehydration of the chemical, and manual cleaning is needed, the invention cleans the impurity films on and under the inner wall of the cylinder by arranging a gear on the top of the liner to drive a screw rod to rotate, so that a nut pair drives a cleaning component to ascend and descend, an annular steel wire brush and an annular brush can respectively clean the inner wall of the cylinder and the outer wall of the liner, the annular brush cleans the impurity films on and under the inner wall of the cylinder, the annular brush cleans the impurity films through self-rotation of the liner, round-head piston rods on two sides of the cleaning component can be pushed into by a convex block group and a convex block of the liner, soda liquid in the water squeezing cylinder is squeezed out to spray the inner wall of the cylinder and the outer wall of the cylinder, make the impurity film decompose, the just good clearance barrel inner wall and inner bag outer wall of annular steel brush and annular brush, the dirty thing of impurity of throwing away like this just can not form the miscellaneous membrane, and the garrulous membrane is remained on the chemical industry article surface, breeds the bacterium, need not artifical clearance.

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.