CN219893852U - Water and fertilizer drip irrigation integrated device for green and crisp Li Chongzhi greenhouse - Google Patents
Water and fertilizer drip irrigation integrated device for green and crisp Li Chongzhi greenhouse Download PDFInfo
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- CN219893852U CN219893852U CN202321191754.0U CN202321191754U CN219893852U CN 219893852 U CN219893852 U CN 219893852U CN 202321191754 U CN202321191754 U CN 202321191754U CN 219893852 U CN219893852 U CN 219893852U
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- 239000003337 fertilizer Substances 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000003973 irrigation Methods 0.000 title claims abstract description 36
- 230000002262 irrigation Effects 0.000 title claims abstract description 36
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 235000021018 plums Nutrition 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011259 mixed solution Substances 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000004720 fertilization Effects 0.000 abstract description 3
- 238000007790 scraping Methods 0.000 abstract description 2
- 210000003608 fece Anatomy 0.000 abstract 2
- 239000010871 livestock manure Substances 0.000 abstract 2
- 241001233242 Lontra Species 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 244000309464 bull Species 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000012010 growth Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000021049 nutrient content Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000021749 root development Effects 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Abstract
Description
技术领域Technical field
本实用新型涉及施肥技术领域，具体为大棚青脆李种植用水肥滴灌一体化装置。The utility model relates to the technical field of fertilization, specifically an integrated device for drip irrigation of green crisp plums with water and fertilizer in greenhouses.
背景技术Background technique
水肥一体化技术，指灌溉与施肥融为一体的农业新技术。水肥一体化是借助压力系统(或地形自然落差)，将可溶性固体或液体肥料，按土壤养分含量和作物种类的需肥规律和特点，配兑成的肥液与灌溉水一起，通过可控管道系统供水、供肥，使水肥相融后，通过管道和滴头形成滴灌,均匀、定时、定量浸润作物根系发育生长区域，使主要根系土壤始终保持疏松和适宜的含水量；同时根据不同的作物的需肥特点，土壤环境和养分含量状况,作物不同生长期需水，需肥规律情况进行不同生育期的需求设计，把水分、养分定时定量，按比例直接提供给作物。Water and fertilizer integration technology refers to a new agricultural technology that integrates irrigation and fertilization. The integration of water and fertilizer is to use the pressure system (or the natural height difference of the terrain) to mix the soluble solid or liquid fertilizer according to the soil nutrient content and the fertilizer demand rules and characteristics of the crop type, and then mix the fertilizer liquid together with the irrigation water through controllable pipelines. The system supplies water and fertilizer. After the water and fertilizer are mixed, drip irrigation is formed through pipes and drippers, which evenly, regularly and quantitatively infiltrates the crop root development and growth area, so that the main root soil always maintains looseness and appropriate moisture content; at the same time, according to different crops According to the fertilizer demand characteristics, soil environment and nutrient content conditions, water needs of crops in different growth periods, and fertilizer demand patterns, the needs of different growth periods are designed, and water and nutrients are regularly and quantitatively provided to crops directly in proportion.
如专利申请号为202120397696.1的一种大棚青脆李种植用水肥滴灌一体化装置，通过所述转动块与所述齿轮四以及所述齿轮三与所述齿轮二，配合所述齿轮一与所述螺纹套以及所述螺纹杆，在所述漂浮板与所述压力传感器的互相作用，能够更好的在对青脆李进行水肥滴灌时更好的进行定量滴灌操作，从而便于能够更好的满足人们的使用需求。For example, the patent application number is 202120397696.1, an integrated device for planting water and fertilizer drip irrigation in greenhouses. Through the rotating block and the gear four, and the gear three and the gear two, the gear one and the gear two are matched. The interaction between the threaded sleeve and the threaded rod and the floating plate and the pressure sensor can better perform quantitative drip irrigation operations when drip irrigation of water and fertilizer on green crisp plums, thereby facilitating better satisfaction. people’s usage needs.
但是上述的此类水肥滴灌一体化装置没有设置独立的混合设备，通常需要人工事先对水肥进行混合搅拌，才能达到良好的混合效果，由此增加了操作人员的劳动强度，通过在搅拌过程中无法保证对结块的肥料进行搅拌彻底，容易导致管道的堵塞，因此，本领域技术人员设计一种大棚青脆李种植用水肥滴灌一体化装置，以解决上述背景技术所提出的问题。However, the above-mentioned integrated water and fertilizer drip irrigation device does not have independent mixing equipment. It usually requires manual mixing of water and fertilizer in advance to achieve a good mixing effect. This increases the labor intensity of the operator and cannot be achieved during the mixing process. Ensuring that the agglomerated fertilizer is stirred thoroughly will easily lead to pipe blockage. Therefore, those skilled in the art designed an integrated device for drip irrigation of water and fertilizer for green crisp plum cultivation in greenhouses to solve the problems raised by the above background technology.
实用新型内容Utility model content
本实用新型的目的在于提供大棚青脆李种植用水肥滴灌一体化装置，以解决上述背景技术中提出的问题。The purpose of this utility model is to provide an integrated device for drip irrigation of green crisp plums in greenhouses with water and fertilizer, so as to solve the problems raised in the above background technology.
为实现上述目的，本实用新型提供如下技术方案：大棚青脆李种植用水肥滴灌一体化装置，包括底板，所述底板顶部固定连接有多个支撑腿，多个所述支撑腿之间设置有水肥混合机构，所述水肥混合机构包括混合筒，所述混合筒固定连接于多个支撑腿之间，所述混合筒内壁固定连接有滤网板，所述混合筒内壁顶部底部之间转动连接有转杆，所述转杆完全贯穿于滤网板，所述转杆表面固定连接有多个搅拌杆，所述转杆表面固定连接有刮板，所述刮板底部滑动连接于滤网板顶部。In order to achieve the above purpose, the present utility model provides the following technical solution: an integrated device for drip irrigation of green crisp plums in greenhouses with water and fertilizer, including a bottom plate. A plurality of supporting legs are fixedly connected to the top of the bottom plate, and a plurality of supporting legs are provided between them. Water and fertilizer mixing mechanism, the water and fertilizer mixing mechanism includes a mixing barrel, the mixing barrel is fixedly connected between a plurality of supporting legs, the inner wall of the mixing barrel is fixedly connected with a filter plate, and the top and bottom of the inner wall of the mixing barrel are rotatably connected. There is a rotating rod, which completely penetrates the filter plate. A plurality of stirring rods are fixedly connected to the surface of the rotating rod. A scraper is fixedly connected to the surface of the rotating rod. The bottom of the scraper is slidingly connected to the filter plate. top.
优选的，所述转杆顶部延伸至混合筒外，且固定连接有被动轮，其中两所述支撑腿一侧固定连接有支撑架，所述支撑架一侧固定连接有驱动电机，所述驱动电机输出端固定连接有主动轮，所述被动轮与主动轮之间通过皮带传动。Preferably, the top of the rotating rod extends to the outside of the mixing barrel and is fixedly connected to a driven wheel. One side of the two supporting legs is fixedly connected to a support frame, and one side of the support frame is fixedly connected to a drive motor. The drive A driving wheel is fixedly connected to the output end of the motor, and the driven wheel and the driving wheel are driven by a belt.
优选的，所述混合筒底部连通有出料管。Preferably, a discharge pipe is connected to the bottom of the mixing barrel.
优选的，所述底板顶部固定连接有抽泵，所述抽泵输入端与出料管相连通。Preferably, a pump is fixedly connected to the top of the bottom plate, and the input end of the pump is connected to the discharge pipe.
优选的，所述抽泵输出端同样连通有出料管，所述出料管另一端连通有三通阀，所述三通阀呈“T”型设置，所述三通阀另外两端分别连通有上水用送水管和滴灌用滴灌埋管。Preferably, the output end of the pump is also connected to a discharge pipe, and the other end of the discharge pipe is connected to a three-way valve. The three-way valve is arranged in a "T" shape, and the other two ends of the three-way valve are connected to each other. There are water delivery pipes for water supply and drip irrigation buried pipes for drip irrigation.
优选的，所述混合筒顶部开设有注料槽，所述注料槽内壁铰接有可开合加料门板。Preferably, a feeding trough is provided on the top of the mixing drum, and an opening and closing feeding door panel is hinged on the inner wall of the feeding trough.
优选的，所述混合筒表面贯穿开设有可视槽，所述可视槽内壁固定连接有透明玻璃挡片。Preferably, the surface of the mixing barrel is provided with a visual groove, and a transparent glass baffle is fixedly connected to the inner wall of the visual groove.
与现有技术相比，本实用新型的有益效果是：Compared with the existing technology, the beneficial effects of this utility model are:
该大棚青脆李种植用水肥滴灌一体化装置，通过转杆转动带动搅拌杆对筒内的肥料和清水进行混合，混合完成后通过滤网板落入混合筒底部的存储腔内进行存放，部分结块的肥料落在滤网板上方，再通过转杆的转动，带动刮板在滤网板上滑动，对结块的肥料进行刮磨，使其能够与内部水肥混合液进行充分混合在一起，提高了装置的混合效果，避免造成对管道的堵塞现象，降低了工人劳动强度。This integrated device for drip irrigation of green crisp plums with water and fertilizer in the greenhouse uses the rotation of the rotating rod to drive the stirring rod to mix the fertilizer and clean water in the cylinder. After the mixing is completed, it falls through the filter plate into the storage cavity at the bottom of the mixing cylinder for storage. The agglomerated fertilizer falls on the filter plate, and then the rotation of the rotating rod drives the scraper to slide on the filter plate, scraping the agglomerated fertilizer so that it can be fully mixed with the internal water and fertilizer mixture. , improve the mixing effect of the device, avoid clogging of pipelines, and reduce the labor intensity of workers.
同时，当大棚青脆李种植用水肥滴灌一体化装置设置三通阀，抽出的水肥混合溶液送至三通阀处，由三通阀控制对送水管闭合时，由抽泵的运作，使水肥混合溶液通过事先铺设的滴灌埋管对大棚内青脆李的根部进行滴灌水肥混合液，在进行滴水工作时，停止抽泵工作，通过调节三通阀，使其对出料管进行闭合，由与水源连接的送水管对滴灌埋管内持续供水，完成了日常对大棚内青脆李的滴灌水工作。At the same time, when the green crisp plum planting in the greenhouse is equipped with a three-way valve in the water-fertilizer drip irrigation integrated device, the extracted water-fertilizer mixed solution is sent to the three-way valve. When the three-way valve controls the water supply pipe to close, the operation of the pump makes the water and fertilizer The mixed solution is drip-irrigated with water and fertilizer mixture through the drip irrigation buried pipe laid in advance in the greenhouse. During the dripping work, the pump is stopped, and the three-way valve is adjusted to close the discharge pipe. The water supply pipe connected to the water source continuously supplies water to the drip irrigation buried pipe, completing the daily drip irrigation of green plums in the greenhouse.
附图说明Description of the drawings
图1为本实用新型的主体结构示意图；Figure 1 is a schematic diagram of the main structure of the utility model;
图2为本实用新型的水肥混合机构内部结构示意图；Figure 2 is a schematic diagram of the internal structure of the water and fertilizer mixing mechanism of the present utility model;
图3为本实用新型的主体底部结构示意图。Figure 3 is a schematic diagram of the bottom structure of the main body of the utility model.
图中：1、底板；2、支撑腿；3、水肥混合机构；301、混合筒；302、转杆；303、搅拌杆；304、滤网板；305、刮板；306、被动轮；307、支撑架；308、驱动电机；309、主动轮；310、皮带；311、加料门板；4、出料管；5、抽泵；6、三通阀；7、送水管；8、滴灌埋管。In the picture: 1. Bottom plate; 2. Supporting legs; 3. Water and fertilizer mixing mechanism; 301. Mixing cylinder; 302. Rotary rod; 303. Stirring rod; 304. Filter plate; 305. Scraper; 306. Passive wheel; 307 , support frame; 308, drive motor; 309, driving wheel; 310, belt; 311, feeding door panel; 4, discharge pipe; 5, pump; 6, three-way valve; 7, water supply pipe; 8, drip irrigation buried pipe .
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
需要说明的是，在本实用新型的描述中，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，并不是指示或暗示所指的装置或元件所必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。It should be noted that in the description of the present utility model, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal" and "top" The orientations or positional relationships indicated by "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not meant to indicate or imply. The device or component must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present invention.
此外，应当理解，为了便于描述，附图中所示出的各个部件的尺寸并不按照实际的比例关系绘制，例如某些层的厚度或宽度可以相对于其他层有所夸大。Furthermore, it should be understood that, for convenience of description, the dimensions of various components shown in the drawings are not drawn to actual scale, such that, for example, the thickness or width of some layers may be exaggerated relative to other layers.
应注意的是，相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义或说明，则在随后的附图的说明中将不需要再对其进行进一步的具体讨论和描述。It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined or illustrated in one drawing, it will not need to be repeated in the description of subsequent drawings. It is discussed and described in further detail.
在进行青脆李的大棚种植中，为将肥料均匀的抛洒在每颗植株上，使用了本本实用新型提供的大棚青脆李种植用水肥滴灌一体化装置，相较于传统的水肥设备，本设备使其能够与内部水肥混合液进行充分混合在一起，提高了装置的混合效果，避免造成对管道的堵塞现象，降低了工人劳动强度。During the greenhouse planting of green crisp plums, in order to evenly sprinkle fertilizer on each plant, the integrated water and fertilizer drip irrigation device for greenhouse green crisp plum planting provided by the utility model is used. Compared with the traditional water and fertilizer equipment, this utility model The equipment allows it to be fully mixed with the internal water and fertilizer mixture, which improves the mixing effect of the device, avoids clogging of the pipeline, and reduces the labor intensity of workers.
如图1-3所示，本实用新型提供一种技术方案：大棚青脆李种植用水肥滴灌一体化装置，包括底板1，底板1顶部固定连接有多个支撑腿2，多个支撑腿2之间设置有水肥混合机构3，水肥混合机构3包括混合筒301，混合筒301固定连接于多个支撑腿2之间，混合筒301内壁固定连接有滤网板304，混合筒301内壁顶部底部之间转动连接有转杆302，转杆302完全贯穿于滤网板304，转杆302表面固定连接有多个搅拌杆303，转杆302表面固定连接有刮板305，刮板305底部滑动连接于滤网板304顶部，通过操作人员将提前配比好的肥料和等比例的清水投入至混合筒301内，通过转杆302的转动，转杆302带动搅拌杆303对筒内的肥料和清水的混合进行搅拌使混合效率更高，混合完成后通过滤网板304落入混合筒301底部的存储腔内进行存放，部分结块的肥料落在滤网板304上方，通过转杆302的转动同时带动刮板305在滤网板304上滑动，对结块的肥料进行刮磨，使其能够与内部水肥混合液进行充分混合在一起，提高了装置的混合效果。As shown in Figures 1-3, the present utility model provides a technical solution: an integrated device for drip irrigation of green crisp plums in greenhouses with water and fertilizer, including a bottom plate 1, and a plurality of supporting legs 2 fixedly connected to the top of the bottom plate 1. A water and fertilizer mixing mechanism 3 is provided between them. The water and fertilizer mixing mechanism 3 includes a mixing cylinder 301. The mixing cylinder 301 is fixedly connected between the plurality of supporting legs 2. The inner wall of the mixing cylinder 301 is fixedly connected with a filter plate 304. The top and bottom of the inner wall of the mixing cylinder 301 are A rotating rod 302 is rotatably connected between them. The rotating rod 302 completely penetrates the filter plate 304. A plurality of stirring rods 303 are fixedly connected to the surface of the rotating rod 302. A scraper 305 is fixedly connected to the surface of the rotating rod 302. The bottom of the scraper 305 is slidingly connected. On the top of the filter plate 304, the operator puts the pre-proportioned fertilizer and equal proportion of clean water into the mixing barrel 301. Through the rotation of the rotating rod 302, the rotating rod 302 drives the mixing rod 303 to mix the fertilizer and clean water in the cylinder. The mixing is carried out to make the mixing efficiency higher. After the mixing is completed, it falls into the storage cavity at the bottom of the mixing cylinder 301 through the filter plate 304 for storage. The partially agglomerated fertilizer falls on the filter plate 304 and is rotated by the rotation of the rotating rod 302. At the same time, the scraper 305 is driven to slide on the filter plate 304 to scrape and grind the agglomerated fertilizer so that it can be fully mixed with the internal water and fertilizer mixture, thereby improving the mixing effect of the device.
作为一种具体的实施例，转杆302顶部延伸至混合筒301外，且固定连接有被动轮306，其中两支撑腿2一侧固定连接有支撑架307，支撑架307一侧固定连接有驱动电机308，驱动电机308输出端固定连接有主动轮309，被动轮306与主动轮309之间通过皮带310传动，通过设置在支撑架307上的驱动电机308进行工作，驱动电机308带动主动轮309进行转动工作，同时通过在转杆302的顶端固定连接有被动轮306，有设置在主动轮309和被动轮306表面的皮带310进行传动工作，使其驱动电机308能够控制对转杆302的转动工作，混合筒301底部连通有出料管4，底板1顶部固定连接有抽泵5，抽泵5输入端与出料管4相连通，在进行水肥灌溉工作时，由设置的抽泵5工作，抽泵5通过出料管4从混合筒301储存腔内将混合完成的水肥混合液抽出，抽泵5输出端同样连通有出料管4，出料管4另一端连通有三通阀6，三通阀6呈“T”型设置，三通阀6另外两端分别连通有上水用送水管7和滴灌用滴灌埋管8，抽出的水肥混合溶液送至三通阀6处，由三通阀6控制流向，三通阀6对上水用的送水管7闭合时，由抽泵5的运作，使水肥混合溶液通过事先铺设的滴灌埋管8对大棚内青脆李的根部进行滴灌水肥混合液，在进行滴水工作时，停止抽泵5工作，通过调节三通阀6，使其对出料管4进行闭合，由与水源连接的送水管7对滴灌埋管8持续供水，完成了日常对大棚内青脆李的滴灌水工作，混合筒301顶部开设有注料槽，注料槽内壁铰接有可开合加料门板311，操作人员将提前配比好的肥料和等比例的清水通过打开可开合的加料门板311，从注料槽处对混合筒301内进行注料工作，混合筒301表面贯穿开设有可视槽，可视槽内壁固定连接有透明玻璃挡片，通过设置可视槽和透明玻璃挡片，便于操作人员，在装置工作时，能够实时了解混合筒301内部情况。As a specific embodiment, the top of the rotating rod 302 extends to the outside of the mixing barrel 301 and is fixedly connected with the driven wheel 306. One side of the two supporting legs 2 is fixedly connected with a support frame 307, and one side of the support frame 307 is fixedly connected with a driving wheel. The output end of the motor 308 and the driving motor 308 is fixedly connected with the driving wheel 309. The driven wheel 306 and the driving wheel 309 are driven by a belt 310 and work through the driving motor 308 provided on the support frame 307. The driving motor 308 drives the driving wheel 309. To carry out the rotation work, at the same time, the driven wheel 306 is fixedly connected to the top of the rotating rod 302, and the belt 310 provided on the surface of the driving wheel 309 and the driven wheel 306 performs transmission work, so that the driving motor 308 can control the rotation of the rotating rod 302 When working, the bottom of the mixing barrel 301 is connected with a discharge pipe 4, and the top of the bottom plate 1 is fixedly connected with a pump 5. The input end of the pump 5 is connected with the discharge pipe 4. When water and fertilizer irrigation is performed, the set pump 5 works. , the pump 5 pumps out the mixed water and fertilizer mixture from the storage chamber of the mixing barrel 301 through the discharge pipe 4. The output end of the pump 5 is also connected to the discharge pipe 4, and the other end of the discharge pipe 4 is connected to a three-way valve 6. The three-way valve 6 is arranged in a "T" shape. The other two ends of the three-way valve 6 are connected to the water supply pipe 7 and the drip irrigation buried pipe 8 respectively. The extracted water and fertilizer mixed solution is sent to the three-way valve 6, and is connected to the three-way valve 6. The one-way valve 6 controls the flow direction. When the three-way valve 6 closes the water supply pipe 7 for supplying water, the operation of the pump 5 causes the water and fertilizer mixed solution to drip irrigate the roots of the green crisp plums in the greenhouse through the drip irrigation buried pipe 8 laid in advance. When the water and fertilizer mixture is dripping, the pump 5 is stopped, and the three-way valve 6 is adjusted to close the discharge pipe 4. The water supply pipe 7 connected to the water source continues to supply water to the drip irrigation buried pipe 8, and the process is completed. In order to facilitate the daily drip irrigation work of green plums in the greenhouse, a feeding trough is provided on the top of the mixing cylinder 301, and an opening and closing feeding door panel 311 is hinged on the inner wall of the feeding trough. The operator will mix the proportioned fertilizer and clean water in advance. By opening the retractable feeding door panel 311, the mixing barrel 301 is filled from the feeding trough. A visual groove is provided on the surface of the mixing barrel 301, and a transparent glass baffle is fixedly connected to the inner wall of the visual groove. By setting The visual groove and the transparent glass cover allow the operator to understand the internal conditions of the mixing barrel 301 in real time when the device is working.
尽管已经示出和描述了本实用新型的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本实用新型的范围由所附权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.
Claims (7)
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