阅读说明：本技术 一种绿色建筑施工使用的多级喷淋式抑尘节水装置 (Multistage fountain dust suppression water saving fixtures that green building construction used ) 是由 魏华 郭庆胜 鹿杰 肖红琰 刘庆军 于 2021-09-02 设计创作，主要内容包括：本发明涉及建筑施工技术领域,尤其涉及了一种绿色建筑施工使用的多级喷淋式抑尘节水装置,包括底座、水箱、转动机构和喷水机构,喷水机构由水泵一、抽水管一、卡扣、通水管、喷水器和雾化喷头组成,转动机构由电机、转轴、蜗杆、蜗轮、安装台、水泵安装槽、滑动垫、连接管和固定板组成。该绿色建筑施工使用的多级喷淋式抑尘节水装置,对绿色建筑施工场地进行喷水,通过雾化喷头将水雾分散,增大水雾与空气中灰尘的接触面积,增大水雾与空气中灰尘的接触几率,从而增加降尘的效果,使喷水器跟随转动,使喷水器在转动的过程中喷出水对绿色建筑施工场地进行喷水抑尘,在转动的过程中喷水,增大了喷水器喷出的水的覆盖范围,从而增加降尘的效果。(The invention relates to the technical field of building construction, in particular to a multi-stage spraying type dust suppression water-saving device for green building construction. This multistage fountain that green building construction used presses down dirt water saving fixtures, spray water to green building construction place, disperse the water smoke through atomizer, the area of contact of dust in increase water smoke and the air, the contact probability of dust in increase water smoke and the air, thereby increase the effect of dust fall, make the sprinkler follow the rotation, make the sprinkler spout water spray to green building construction place at pivoted in-process blowout water and press down the dirt, at the pivoted in-process water spray, the coverage of sprinkler spun water has been increased, thereby increase the effect of dust fall.)

1. The utility model provides a multistage fountain dust suppression water saving fixtures that green building construction used, includes base (1), water tank (2), slewing mechanism (4) and water spray mechanism (5), its characterized in that: the water tank (2) is fixedly arranged at the center of the top of the base (1), the rotating mechanism (4) is arranged at the top of the water tank (2), and the water spraying mechanism (5) is fixedly arranged at the top of the rotating mechanism (4);

water spray mechanism (5) comprise water pump (501), drinking-water pipe (502), buckle (503), water service pipe (504), sprinkler (505) and atomizer (506), water pump (501) fixed mounting is in the top of slewing mechanism (4), water pumping pipe (502) fixed connection is in the output of water pump (501), buckle (503) cup joint in the surface of drinking-water pipe (502), water service pipe (504) fixed connection is in the output of water pump (501), sprinkler (505) fixed mounting is in the one end of water service pipe (504) keeping away from water pump (501), atomizer (506) fixed mounting is in the inside left side of sprinkler (505).

2. The multi-stage spraying dust suppression water saving device for green building construction according to claim 1, characterized in that: one end that the water pump (501) was kept away from to drinking-water pipe (502) extends to the inside of water tank (2), the quantity of buckle (503) is two, water service pipe (504) run through the inside of sprinkler (505) and communicate with atomizer (506).

3. The multi-stage spraying dust suppression water saving device for green building construction according to claim 1, characterized in that: the rotating mechanism (4) consists of a motor (401), a rotating shaft (402), a worm (403), a worm wheel (404), an installation platform (405), a water pump installation groove (406), a sliding pad (407), a connecting pipe (408) and a fixing plate (409), the motor (401) is fixedly arranged at the right side of the top of the water tank (2), the rotating shaft (402) is connected with the output end of the motor (401), the worm (403) is fixedly connected with one end of the rotating shaft (402) far away from the motor (401), the worm wheel (404) is connected with the side surface of the worm (403) in a meshing way, the mounting table (405) is fixedly mounted at the top of the worm wheel (404), the water pump mounting groove (406) is arranged on the upper surface of the mounting table (405), the sliding pad (407) is arranged at the bottom of the worm wheel (404), the connecting pipe (408) is fixedly connected to the bottom of the worm wheel (404), and the fixing plate (409) is arranged at the bottom of the outer surface of the connecting pipe (408).

4. The multi-stage spraying dust suppression water saving device for green building construction according to claim 3, characterized in that: output shaft fixed connection of pivot (402) and motor (401), the diameter of mount table (405) is less than the diameter of worm wheel (404), the top of water pump mounting groove (406) and the bottom joint of water pump (501), the material of sliding pad (407) is rubber, connecting pipe (408) run through sliding pad (407) and extend to the inside of fixed plate (409), the inside of fixed plate (409) and the surface sliding connection of connecting pipe (408).

5. The multi-stage spraying dust suppression water saving device for green building construction according to claim 1, characterized in that: the utility model discloses a dustproof road surface cleaning device, including base (1), the inside fixed mounting of base (1) has power supply box (3), the top left and right sides fixed mounting of base (1) has guardrail (6), the side fixed mounting of guardrail (6) has presses down dirt mechanism (7), water inlet (8) have been seted up in the front of water tank (2), the positive fixed mounting of base (1) has baffle (9), the left and right sides of base (1) is provided with wheel (10).

6. The multi-stage spraying dust suppression water saving device for green building construction according to claim 5, characterized in that: the back fixedly connected with handle of guardrail (6), power supply box (3) respectively with water pump (501) and motor (401) electric connection, the quantity that presses down dirt mechanism (7) is two, two press down dirt mechanism (7) symmetric distribution in the left and right sides of guardrail (6).

7. The multi-stage spraying dust suppression water saving device for green building construction according to claim 6, characterized in that: press down dirt mechanism (7) by shower (701), porous shower nozzle (702), press down dirt agent pond (703), one-way valve (704), drinking-water pipe two (705) and water pump two (706) and constitute, shower (701) fixed connection is in guardrail (6) one side of keeping away from water tank (2), porous shower nozzle (702) fixed mounting is in the top of shower (701), press down dirt agent pond (703) fixed mounting in the inside of shower (701), water pump two (706) fixed mounting is in the front of water tank (2), drinking-water pipe two (705) fixed connection is in the output of water pump two (706).

8. The multi-stage spraying dust suppression water saving device for green building construction according to claim 7, characterized in that: the dust suppressant tank (703) is filled with dust suppressant, the dust suppressant is formed by combining a novel multifunctional high polymer, one end of the second water pumping pipe (705) extends to the inside of the water tank (2), the other end of the second water pumping pipe (705) penetrates through the spraying pipe (701) and the dust suppressant tank (703), the one-way valve (704) is arranged on the part, penetrating through the dust suppressant tank (703), of the outer surface of the second water pumping pipe (705), and the second water pump (706) is electrically connected with the power supply box (3).

Technical Field

The invention relates to the technical field of building construction, in particular to a multi-stage spraying type dust suppression water-saving device used in green building construction.

Background

The green building is a high-quality building which saves resources, protects the environment, reduces pollution, provides healthy, applicable and efficient use space for people and realizes harmony and symbiosis between people and nature to the maximum extent in the whole life cycle, and the green building inevitably generates a large amount of smoke in the construction process.

The prior art generally adopts spray equipment to fall dust, but the contact probability of the water smoke sprayed by the existing spray equipment and dust-containing gas is lower, and the water liquid is easy to capture larger dust particles, so that the collection effect of fine dust is poor, and the coverage area is smaller.

Disclosure of Invention

The invention aims to provide a multi-stage spraying type dust suppression water-saving device for green building construction, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a multistage fountain dust suppression water saving fixtures that green building construction used, includes base, water tank, slewing mechanism and water spray mechanism, water tank fixed mounting is in the top center of base, slewing mechanism sets up in the top of water tank, water spray mechanism fixed mounting is in slewing mechanism's top.

The utility model discloses a water spray mechanism, including water pump one, drinking-water pipe one, buckle, water service pipe, sprinkling machine and atomizer, a water pump fixed mounting is in slewing mechanism's top, a drinking-water pipe fixed connection is in the output of water pump one, the buckle cup joints the surface in drinking-water pipe one, water service pipe fixed connection is in the output of water pump one, sprinkling machine fixed mounting keeps away from the one end of water pump one in the water service pipe, atomizer fixed mounting is in the inside left side of sprinkling machine.

Preferably, the one end that water pump one was kept away from to the drinking-water pipe extends to the inside of water tank, the quantity of buckle is two, the water service pipe runs through the inside of sprinkler and communicates with atomizer, when spraying water to green building construction place and suppressing dirt, through starting water pump one, water pump one takes the inside water of water tank out through drinking-water pipe one, lets in the inside of sprinkler from the water service pipe after a water pump pressurization, and the water after the pressurization is from atomizer blowout.

Preferably, slewing mechanism comprises motor, pivot, worm wheel, mount table, water pump mounting groove, sliding pad, connecting pipe and fixed plate, motor fixed mounting is on the top right side of water tank, the pivot is connected in the output of motor, the one end of motor is kept away from in the pivot to worm fixed connection, the worm wheel meshing is connected in the side of worm, mount table fixed mounting is in the top of worm wheel, the upper surface of mount table is seted up to the water pump mounting groove, the sliding pad sets up in the bottom of worm wheel, connecting pipe fixed connection is in the bottom of worm wheel, the fixed plate sets up in the surface bottom of connecting pipe.

Preferably, the output shaft fixed connection of pivot and motor, the diameter of mount table is less than the diameter of worm wheel, the top of water pump mounting groove and the bottom joint of water pump one, the material of sliding pad is rubber, the connecting pipe runs through the inside that sliding pad just extended to the fixed plate, the inside of fixed plate and the surface sliding connection of connecting pipe when spraying water to green building construction place and suppressing dirt, through the starter motor, the output shaft of motor drives the pivot and rotates, and the pivot drives the worm and rotates, and the worm drives rather than the worm wheel rotation of meshing, because the joint of water pump one is in the inside of water pump mounting groove, and the upper surface of mount table is seted up to the water pump mounting groove, the top fixed connection of mount table and worm wheel, therefore the water pump can be driven rotatoryly to make the water sprayer follow and rotate.

Preferably, the inside fixed mounting of base has the power supply box, the top left and right sides fixed mounting of base has the guardrail, the side fixed mounting of guardrail has the dust suppression mechanism, the water inlet has been seted up in the front of water tank, the front fixed mounting of base has the baffle, the left and right sides of base is provided with the wheel.

Preferably, the back fixedly connected with handle of guardrail, the power supply box respectively with water pump one and motor electric connection, press down the quantity of dirt mechanism and be two, two press down dirt mechanism symmetric distribution in the left and right sides of guardrail, when spraying water to green building construction place and press down dirt, constructor makes the wheel rotate through the handle that promotes the guardrail back to promote whole automobile body and remove at green building construction place.

Preferably, it comprises shower, porous shower nozzle, dust suppressant pond, one-way valve, drinking-water pipe two and water pump two to press down dirt mechanism, shower fixed connection is in the one side that the water tank was kept away from to the guardrail, porous shower nozzle fixed mounting is in the top of shower, dust suppressant pond fixed mounting is in the inside of shower, two fixed mounting of water pump are in the front of water tank, two fixed connection of drinking-water pipe are in the output of water pump two.

Preferably, the dust suppressant tank is internally filled with dust suppressant, the dust suppressant is formed by combining a novel multifunctional high polymer, one end of the second water pumping pipe extends to the inside of the water tank, the other end of the second water pumping pipe penetrates through the spraying pipe and the dust suppressant tank, the one-way valve is arranged on the part, penetrating through the dust suppressant tank, of the outer surface of the second water pumping pipe, the second water pump is electrically connected with the power supply box, when water is sprayed to a green building construction site for suppressing dust, the second water pump is started to pump out water inside the water tank through the second water pumping pipe and send the water into the spraying pipe along the second water pumping pipe, when the water passes through the dust suppressant tank, the dust suppressant inside the dust suppressant tank can be taken out by the water, and the water sprayed from the porous spray head contains the dust suppressant.

Compared with the prior art, the invention has the beneficial effects that:

1. this multistage fountain that green building construction used presses down dirt water saving fixtures, when spraying water and pressing down dirt to green building construction place, through starting water pump one, water pump one is taken out the inside water of water tank through drinking-water pipe one, let in the inside of sprinkler from the water service pipe after the pressurization through water pump one, water after the pressurization is from the atomizer blowout, spray water to green building construction place, disperse the water smoke through the atomizer, the area of contact of dust in increase water smoke and the air, the contact probability of dust in increase water smoke and the air, thereby increase the effect of dust fall.

2. This multistage fountain that green building construction used presses down dirt water saving fixtures, when spraying water and pressing down dirt to green building construction place, through the starter motor, the output shaft of motor drives the pivot and rotates, the pivot drives the worm and rotates, the worm drives rather than the worm wheel rotation of meshing, because the joint of water pump one is in the inside of water pump mounting groove, and the upper surface of mount table is seted up to the water pump mounting groove, the top fixed connection of mount table and worm wheel, therefore the water pump can be driven rotatoryly, thereby make the sprinkler follow and rotate, make the sprinkler spout water spray water to green building construction place at the pivoted in-process and press down dirt, at pivoted in-process water spray, the coverage of sprinkler spun water has been increased, thereby increase the effect of dust fall.

3. This multistage fountain that green building construction used presses down dirt water saving fixtures, when spraying water and pressing down dirt to green building construction place, through starting water pump two, water pump two is taken the inside water of water tank out through drinking-water pipe two, send into inside the shower pipe along drinking-water pipe two, when water is through pressing down the dirt agent pond, press down the inside dirt agent in dirt agent pond and can be taken out by the hosepipe, make the aquatic of spun contain the dirt agent from the porous nozzle, the dirt agent that presses down that forms by the combination of novel multi-functional high polymer, firmly adsorb the particle dust, have very strong press down dirt, dirt-proof effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a front view of the present invention;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a top view of the rotating mechanism of the present invention;

FIG. 4 is a front view of the sliding pad of the present invention;

FIG. 5 is a schematic structural view of a water spraying mechanism according to the present invention;

FIG. 6 is a schematic structural view of a dust suppressing mechanism of the present invention.

In the figure: 1 base, 2 water tanks, 3 power supply boxes, 4 rotating mechanisms, 401 motors, 402 rotating shafts, 403 worms, 404 worm wheels, 405 installation tables, 406 water pump installation grooves, 407 sliding pads, 408 connecting pipes, 409 fixing plates, 5 water spraying mechanisms, 501 water pumps, 502 water pumping pipes, 503 buckles, 504 water through pipes, 505 water sprayers, 506 atomizing nozzles, 6 guardrails, 7 dust suppression mechanisms, 701 spray pipes, 702 porous nozzles, 703 dust suppressant pools, 704 one-way valves, 705 water pumping pipes II, 706 water pumps II, 8 water inlets, 9 baffles and 10 wheels.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-6, the present invention provides a technical solution: a multi-stage spraying dust suppression water saving device used in green building construction comprises a base 1, a water tank 2, a rotating mechanism 4 and a water spraying mechanism 5, wherein the water tank 2 is fixedly arranged at the center of the top of the base 1, the rotating mechanism 4 is arranged at the top of the water tank 2, the water spraying mechanism 5 is fixedly arranged at the top of the rotating mechanism 4, a power supply box 3 is fixedly arranged inside the base 1, guardrails 6 are fixedly arranged on the left side and the right side of the top of the base 1, a dust suppression mechanism 7 is fixedly arranged on the side surfaces of the guardrails 6, a water inlet 8 is formed in the front of the water tank 2, a baffle plate 9 is fixedly arranged on the front surface of the base 1, axles are fixedly connected on the left side and the right side of the base 1, wheels 10 are rotatably connected to the outer surfaces of the axles, a handle is fixedly connected to the backs of the guardrails 6, the power supply box 3 is respectively electrically connected with a first water pump 501 and a motor 401, the number of the dust suppression mechanisms 7 is two, the two dust suppression mechanisms 7 are symmetrically distributed on the left side and the right side of the guardrails 6, when spraying water and suppressing dirt to green building construction place, constructor makes wheel 10 rotate through the handle that promotes 6 backs of guardrail to promote whole automobile body and remove at green building construction place, spray water to green building construction place many places and suppress dirt, water inlet 8 conveniently mends water to water tank 2, and baffle 9 can reduce the impact of striking to water tank 2.

The rotating mechanism 4 comprises a motor 401, a rotating shaft 402, a worm 403, a worm wheel 404, an installation platform 405, a water pump installation groove 406, a sliding pad 407, a connecting pipe 408 and a fixing plate 409, the motor 401 is fixedly installed on the right side of the top of the water tank 2, the rotating shaft 402 is connected with the output end of the motor 401, the worm 403 is fixedly connected with one end of the rotating shaft 402 far away from the motor 401, the worm wheel 404 is meshed and connected with the side surface of the worm 403, the installation platform 405 is fixedly installed on the top of the worm wheel 404, the water pump installation groove 406 is opened on the upper surface of the installation platform 405, the sliding pad 407 is arranged at the bottom of the worm wheel 404, the connecting pipe 408 is fixedly connected with the bottom of the worm wheel 404, the fixing plate 409 is arranged at the bottom of the outer surface of the connecting pipe 408, the rotating shaft 402 is fixedly connected with the output shaft of the motor 401, the diameter of the installation platform 405 is smaller than that of the worm wheel 404, the top of the water pump installation groove 406 is clamped with the bottom of the water pump 501, and the sliding pad 407 is made of rubber, the connecting pipe 408 penetrates through the sliding pad 407 and extends to the inside of the fixing plate 409, the inside of the fixing plate 409 is connected with the outer surface of the connecting pipe 408 in a sliding manner, when water spraying and dust suppression are performed on a green building construction site, the motor 401 is started, the output shaft of the motor 401 drives the rotating shaft 402 to rotate, the rotating shaft 402 drives the worm 403 to rotate, the worm 403 drives the worm wheel 404 meshed with the worm to rotate, the first water pump 501 is clamped inside the water pump mounting groove 406, the water pump mounting groove 406 is arranged on the upper surface of the mounting table 405, and the mounting table 405 is fixedly connected with the top of the worm wheel 404, so that the first water pump 501 is driven to rotate, the water sprayer 505 rotates along with the worm wheel, water is sprayed out of the water sprayer 505 in the rotating process to spray water and suppress dust on the green building construction site, water is sprayed out in the rotating process, the coverage range of the water sprayed out of the water sprayer 505 is enlarged, and the dust suppression effect is increased, the worm wheel 404 drives the connecting pipe 408 to rotate in the rotating process, so that the connecting pipe 408 rotates in the fixing plate 409, and the rubber sliding pad 407 prevents the worm wheel 404 from contacting with the fixing plate 409 to generate friction in the rotating process.

The water spraying mechanism 5 comprises a first water pump 501, a first water pumping pipe 502, a buckle 503, a water through pipe 504, a water sprayer 505 and an atomizing spray nozzle 506, wherein the first water pump 501 is fixedly arranged at the top of the rotating mechanism 4, the first water pumping pipe 502 is fixedly connected to the output end of the first water pump 501, the buckle 503 is sleeved on the outer surface of the first water pumping pipe 502, the water through pipe 504 is fixedly connected to the output end of the first water pump 501, the water sprayer 505 is fixedly arranged at one end, away from the first water pump 501, of the water through pipe 504, the atomizing spray nozzle 506 is fixedly arranged at the left side of the inside of the water sprayer 505, one end, away from the first water pump 501, of the water pumping pipe 502 extends into the water tank 2, the number of the buckle 503 is two, the water through pipe 504 penetrates through the inside of the water sprayer 505 and is communicated with the atomizing spray nozzle 506, when water spraying and dust suppression are carried out on a green building construction site, the first water pump 501 is started, the first water pump 501 pumps the water out of the water through the first water pumping pipe 502, the pressurized water is introduced into the water sprayer 505 from the water pipe 504 after being pressurized by the first water pump 501, the pressurized water is sprayed out from the atomizing nozzle 506 to spray water to a green building construction site, the water mist is dispersed by the atomizing nozzle 506, the contact area between the water mist and dust in the air is increased, the contact probability between the water mist and the dust in the air is increased, and the dust settling effect is increased.

The dust suppression mechanism 7 comprises a spray pipe 701, a porous spray head 702, a dust suppressant pool 703, a one-way valve 704, a water pumping pipe two 705 and a water pump two 706, the spray pipe 701 is fixedly connected to one side of the guardrail 6 far away from the water tank 2, the porous spray head 702 is fixedly arranged at the top of the spray pipe 701, the dust suppressant pool 703 is fixedly arranged inside the spray pipe 701, the water pump two 706 is fixedly arranged on the front side of the water tank 2, the water pumping pipe two 705 is fixedly connected to the output end of the water pump two 706, the dust suppressant pool 703 is filled with dust suppressant, the dust suppressant is formed by combining novel multifunctional high polymer, one end of the water pumping pipe two 705 extends into the water tank 2, the other end of the water pumping pipe two 705 penetrates through the spray pipe 701 and the dust suppressant pool 703, the one-way valve 704 is arranged on the outer surface of the water pumping pipe two 705 and penetrates through the dust suppressant pool 703, the one-way valve 704 is equidistantly distributed on the outer surface of the water pumping pipe two 705 and penetrates through the dust suppressant pool 703, the second water pump 706 is electrically connected with the power supply box 3, when water is sprayed to a green building construction site for dust suppression, the second water pump 706 is started, the second water pump 706 pumps water in the water tank 2 through the second water pumping pipe 705 and sends the water into the spraying pipe 701 along the second water pumping pipe 705, when the water passes through the dust suppressant pool 703, the dust suppressant in the dust suppressant pool 703 is taken out by water, so that the water sprayed from the porous spray head 702 contains the dust suppressant, the dust suppressant formed by combining novel multifunctional high polymer is in a cross-linking molecular structure, various ion groups are arranged among the molecules, and the ion groups have strong affinity with ions due to high charge density, can quickly capture and firmly adsorb particle dust through coagulation, bonding and other actions, and can be solidified into a film on the surface of the dust after being dried, so that the dust suppression and dust prevention effects are achieved.

When in use, by starting the motor 401, the output shaft of the motor 401 drives the rotating shaft 402 to rotate, the rotating shaft 402 drives the worm 403 to rotate, the worm 403 drives the worm wheel 404 engaged with the worm 403 to rotate, because the first water pump 501 is clamped inside the water pump installation groove 406, and the water pump installation groove 406 is opened on the upper surface of the installation platform 405, the installation platform 405 is fixedly connected with the top of the worm wheel 404, therefore, the first water pump 501 is driven to rotate, and by starting the first water pump 501, the first water pump 501 pumps out the water in the water tank 2 through the first water pumping pipe 502, pressurized by the first water pump 501, then introduced into the sprinkler 505 from the water pipe 504, and the pressurized water is sprayed out from the atomizing nozzle 506, the water sprayer 505 sprays water to the green building construction site, the water sprayer sprays water to the green building construction site in the rotating process to inhibit dust, and the water sprayer 505 sprays water in the rotating process to enlarge the coverage of the water sprayed by the water sprayer 505.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.