Engine cleaning sewage treatment device

文档序号:1633952 发布日期:2020-01-17 浏览:16次 中文

阅读说明:本技术 一种发动机清理污水处理装置 (Engine cleaning sewage treatment device ) 是由 钟新杰 于 2019-10-29 设计创作,主要内容包括:本发明公开了一种发动机清理污水处理装置,包括机壳,所述机壳内右端设有传动腔,所述机壳内还设有第一进水腔,所述第一进水腔下侧设有过滤腔,所述传动腔内设有为装置提供动力的传动机构,所述第一进水腔内设有感应装置是否堵塞并加速过滤排水的压水机构,所述过滤腔内设有起过滤作用的过滤机构,所述过滤腔内还设有冲洗灰尘和油层的冲洗机构,该装置在工作时,能高效连续对清理完的发动机的污水进行震荡过滤处理,该装置还自带清理功能,当装置清理污水时过滤板堵塞,该装置会自动感应并将过滤板进行清理,并将堵塞物集中收集起来。(The invention discloses an engine cleaning sewage treatment device, which comprises a machine shell, wherein a transmission cavity is arranged at the right end in the machine shell, a first water inlet cavity is also arranged in the machine shell, a filter cavity is arranged at the lower side of the first water inlet cavity, a transmission mechanism for providing power for the device is arranged in the transmission cavity, a water pressing mechanism for sensing whether a device is blocked and accelerating filtering and draining is arranged in the first water inlet cavity, a filter mechanism for filtering is arranged in the filter cavity, and a flushing mechanism for flushing dust and an oil layer is also arranged in the filter cavity.)

1. The utility model provides an engine clearance sewage treatment plant, includes the casing, its characterized in that: a transmission cavity is arranged at the right end in the casing, a first water inlet cavity is further arranged in the casing, a filter cavity is arranged at the lower side of the first water inlet cavity, a transmission mechanism for providing power for the device is arranged in the transmission cavity, a water pressing mechanism for sensing whether the device is blocked and accelerating filtering and drainage is arranged in the first water inlet cavity, a filter mechanism for filtering is arranged in the filter cavity, and a flushing mechanism for flushing dust and an oil layer is further arranged in the filter cavity;

the water pressing mechanism comprises a second water inlet cavity positioned on the right side of the first water inlet cavity, a partition plate cavity with a downward opening is arranged on the upper cavity wall of the second water inlet cavity, a driven cavity is arranged in the first water inlet cavity, a partition plate capable of moving up and down in the cavity is arranged in the partition plate cavity, a tension spring connected with the upper cavity wall of the partition plate cavity is fixedly arranged on the upper end surface of the partition plate, a rack capable of moving up and down in the cavity is arranged in the driven cavity, a fixed plate is fixedly connected with the right end surface of the upper end of the rack, an elastic spring is fixedly arranged on the lower end surface of the fixed plate and connected with the lower cavity wall of the driven cavity, a piston plate capable of moving up and down in the first water inlet cavity is fixedly arranged on the lower end surface of the rack, a driven gear with the left end extending into the left cavity wall of the partition plate cavity is rotatably connected with the, the left end of the first sector gear is also provided with a second sector gear in meshed connection with the rack, the right end of the driven gear is provided with a driven gear positioned in the transmission cavity, the upper end face of the right end of the piston plate is fixedly connected with a hemp rope, the right cavity wall of the filter cavity is provided with a moving cavity with a left opening, a moving block capable of moving up and down in the cavity is arranged in the moving cavity, the lower cavity wall of the moving block is provided with a lower cavity wall connected with the moving cavity, the right end face of the moving block is fixedly connected with one end of a cotton rope, and the left end face of the moving block is fixedly connected with;

the device provides power through the transmission mechanism, sewage is treated through the filter plate, whether dust and oil stains separated from the sewage need to be washed or not is sensed through the first water inlet cavity, and finally the dust and the oil stains are washed and collected together through the washing mechanism.

2. The engine-cleaning wastewater treatment device according to claim 1, wherein: the transmission mechanism comprises a motor fixed on the wall of the right cavity of the transmission cavity, the left end of the motor is in power connection with a transmission shaft, the left end of the transmission shaft is in key connection with a sliding gear, a sliding cavity with a left opening is formed in the sliding gear, a sliding block capable of sliding in the cavity is arranged in the sliding cavity, the left end face of the sliding block is fixedly connected with one end of the cord, the right end of the transmission shaft is provided with an annular plate located on the right side of the sliding gear, and the left end face of the annular plate is fixedly provided with two extension springs connected with the right end.

3. The engine-cleaning wastewater treatment device according to claim 1, wherein: the filtering mechanism comprises lifting cavities arranged on the left cavity wall and the right cavity wall of the filtering cavity, lifting blocks capable of moving up and down in the lifting cavities are arranged in the lifting cavities, a compression spring connected with the lower cavity wall of the lifting cavity is arranged on the lower end surface of the lifting block, a pull rope is fixedly connected with the upper end surface of the lifting block on the right side, a filter plate is fixedly connected between the two lifting blocks, the filter plate can move up and down in the filter cavity, the lower cavity wall of the transmission cavity is provided with a push rod cavity with an upward opening, a push rod capable of moving up and down in the cavity is arranged in the push rod cavity, a return spring is fixedly arranged on the lower end face of the push rod and connected with the lower cavity wall of the push rod cavity, the left end face of the push rod is fixedly connected with one end of the pull rope, a water outlet of the cleaned water discharging device is formed in the lower cavity wall of the filter cavity, and a cam located on the upper side of the push rod is arranged at the left end of the transmission shaft.

4. The engine-cleaning wastewater treatment device according to claim 1, wherein: the flushing mechanism comprises a collecting cavity positioned on the right side of the filter cavity, a through hole communicated with the filter cavity is arranged on the left cavity wall of the collecting cavity, a baffle cavity is arranged in the through hole, a pressure spring is fixedly arranged on the upper end surface of the baffle which can move up and down in the cavity and is connected with the upper cavity wall of the baffle cavity, the upper end surface of the baffle is connected with one end of the hemp rope, a sundry outlet communicated with the external space is arranged on the right cavity wall of the collecting cavity, a pipeline is arranged outside the left cavity wall of the filter cavity, a baffle cavity is arranged in the pipeline, a baffle block which can move up and down in the cavity is arranged in the baffle cavity, an expansion spring connected with the upper cavity wall of the baffle cavity is fixedly arranged on the upper end surface of the baffle block, a thin rope is fixedly connected with the upper end surface of the baffle block, a pressing block, the pressing block lower end face is fixedly provided with an elastic spring connected with the pressing block cavity lower cavity wall, the pressing block left end face is fixedly connected with one end of the thin rope, and the second water inlet cavity left cavity wall is provided with a water inlet communicated with an external space.

5. The engine-cleaning wastewater treatment device according to claim 1, wherein: in an initial state, the floating plate and the moving block are positioned at the lower end in the moving cavity.

6. The engine-cleaning wastewater treatment device according to claim 2, characterized in that: in an initial state, the sliding gear is disconnected from the driven gear, and the tensile force of the extension spring is larger than the friction force applied to the sliding gear when the sliding gear slides on the transmission shaft.

7. The engine-cleaning wastewater treatment device according to claim 1, wherein: in an initial state, the partition plate and the rack are respectively positioned in the partition plate cavity and the driven cavity under the tensile force of the tension spring and the elastic spring.

Technical Field

The invention relates to the field of cleaning, in particular to a device for treating engine cleaning sewage.

Background

The engine can be infected with more dust and oil stain after using for a long time, need regularly wash the engine, and the water that has washd the engine can have oil stain and dust, directly can cause the pollution to the environment with its discharge, needs carry out the scrubbing to the water that has washd.

At the present stage, the water which is cleaned up by the engine is generally not treated and is directly discharged into a sewer, and the cleaned up water can not be utilized to cause water pollution, and can cause certain pollution to the environment.

Disclosure of Invention

The invention aims to solve the technical problem of providing an engine cleaning sewage treatment device, which overcomes the problems of slow filtration, blockage of a filter device and the like, improves the filtration efficiency and increases the function of cleaning blockage.

The invention is realized by the following technical scheme.

The invention discloses an engine cleaning sewage treatment device, which comprises a machine shell, wherein a transmission cavity is arranged at the right end in the machine shell, a first water inlet cavity is also arranged in the machine shell, a filter cavity is arranged at the lower side of the first water inlet cavity, a transmission mechanism for providing power for the device is arranged in the transmission cavity, a water pressing mechanism for sensing whether the device is blocked and accelerating filtration and drainage is arranged in the first water inlet cavity, a filter mechanism for filtering is arranged in the filter cavity, and a flushing mechanism for flushing dust and an oil layer is also arranged in the filter cavity;

the water pressing mechanism comprises a second water inlet cavity positioned on the right side of the first water inlet cavity, a partition plate cavity with a downward opening is arranged on the upper cavity wall of the second water inlet cavity, a driven cavity is arranged in the first water inlet cavity, a partition plate capable of moving up and down in the cavity is arranged in the partition plate cavity, a tension spring connected with the upper cavity wall of the partition plate cavity is fixedly arranged on the upper end surface of the partition plate, a rack capable of moving up and down in the cavity is arranged in the driven cavity, a fixed plate is fixedly connected with the right end surface of the upper end of the rack, an elastic spring is fixedly arranged on the lower end surface of the fixed plate and connected with the lower cavity wall of the driven cavity, a piston plate capable of moving up and down in the first water inlet cavity is fixedly arranged on the lower end surface of the rack, a driven gear with the left end extending into the left cavity wall of the partition plate cavity is rotatably connected with the, the left end of the first sector gear is also provided with a second sector gear in meshed connection with the rack, the right end of the driven gear is provided with a driven gear positioned in the transmission cavity, the upper end face of the right end of the piston plate is fixedly connected with a hemp rope, the right cavity wall of the filter cavity is provided with a moving cavity with a left opening, a moving block capable of moving up and down in the cavity is arranged in the moving cavity, the lower cavity wall of the moving block is provided with a lower cavity wall connected with the moving cavity, the right end face of the moving block is fixedly connected with one end of a cotton rope, and the left end face of the moving block is fixedly connected with;

the device provides power through the transmission mechanism, sewage is treated through the filter plate, whether dust and oil stains separated from the sewage need to be washed or not is sensed through the first water inlet cavity, and finally the dust and the oil stains are washed and collected together through the washing mechanism.

Further, the transmission mechanism comprises a motor fixed on the right cavity wall of the transmission cavity, the left end of the motor is in power connection with a transmission shaft, the left end of the transmission shaft is in key connection with a sliding gear, a sliding cavity with a left opening is arranged in the sliding gear, a sliding block capable of sliding in the cavity is arranged in the sliding cavity, the left end face of the sliding block is fixedly connected with one end of the cord, the right end of the transmission shaft is provided with an annular plate located on the right side of the sliding gear, and the left end face of the annular plate is fixedly provided with two extension springs connected with the right end face of the sliding.

Further, the filtering mechanism comprises a lifting cavity arranged on the left cavity wall and the right cavity wall of the filtering cavity, the lifting cavities are internally provided with lifting blocks which can move up and down in the cavities, the lower end faces of the lifting blocks are provided with compression springs connected with the lower cavity walls of the lifting cavities, the upper end faces of the lifting blocks on the right side are fixedly connected with pull ropes, a filter plate is fixedly connected between the two lifting blocks, the filter plate can move up and down in the filter cavity, the lower cavity wall of the transmission cavity is provided with a push rod cavity with an upward opening, a push rod capable of moving up and down in the cavity is arranged in the push rod cavity, a return spring is fixedly arranged on the lower end face of the push rod and connected with the lower cavity wall of the push rod cavity, the left end face of the push rod is fixedly connected with one end of the pull rope, a water outlet of the cleaned water discharging device is formed in the lower cavity wall of the filter cavity, and a cam located on the upper side of the push rod is arranged at the left end of the transmission shaft.

Further, the flushing mechanism comprises a collecting cavity positioned on the right side of the filter cavity, a through hole communicated with the filter cavity is arranged on the left cavity wall of the collecting cavity, a baffle cavity is arranged in the through hole, a pressure spring is fixedly arranged on the upper end face of the baffle capable of moving up and down in the baffle cavity and is connected with the upper cavity wall of the baffle cavity, the upper end face of the baffle is connected with one end of the hemp rope, a sundry outlet communicated with the external space is arranged on the right cavity wall of the collecting cavity, a pipeline is arranged outside the left cavity wall of the filter cavity, a baffle cavity is arranged in the pipeline, a baffle capable of moving up and down in the baffle cavity is arranged in the baffle cavity, a telescopic spring connected with the upper cavity wall of the baffle cavity is fixedly arranged on the upper end face of the baffle, a thin rope is fixedly connected with the upper end face of the baffle, a pressing block cavity with an, the pressing block lower end face is fixedly provided with an elastic spring connected with the pressing block cavity lower cavity wall, the pressing block left end face is fixedly connected with one end of the thin rope, and the second water inlet cavity left cavity wall is provided with a water inlet communicated with an external space.

Further, in an initial state, the floating plate and the moving block are located at the lower end in the moving cavity.

Further, in an initial state, the sliding gear is disconnected from the driven gear, and the tensile force of the extension spring is greater than the friction force applied to the sliding gear when the sliding gear slides on the transmission shaft.

Further, in an initial state, the partition plate and the rack are located in the partition plate cavity and the driven cavity under the tensile force of the tension spring and the elastic spring respectively.

The invention has the beneficial effects that: the device simple structure, the simple operation, the device can vibrate filtration treatment to the sewage of the engine that has cleared up in high-efficient succession at the during operation, and the device is still from taking clearance function, and the filter blocks up when the device clears up sewage, and the device can the auto-induction and clears up the filter to concentrate the plug and collect.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure at A in FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a schematic view of the structure shown at B in FIG. 1 according to the embodiment of the present invention;

figure 4 is a schematic view of the first sector gear in full section in the embodiment of the present invention.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The engine cleaning sewage treatment device according to the attached fig. 1-4 comprises a casing 18, a transmission cavity 48 is arranged at the right end in the casing 18, a first water inlet cavity 34 is further arranged in the casing 18, a filter cavity 16 is arranged at the lower side of the first water inlet cavity 34, a transmission mechanism 53 for providing power for the device is arranged in the transmission cavity 48, a water pressing mechanism 35 for sensing whether the device is blocked and accelerating filtration and drainage is arranged in the first water inlet cavity 34, a filter mechanism 11 for filtering is arranged in the filter cavity 16, a flushing mechanism 25 for flushing dust and oil layers is further arranged in the filter cavity 16, the water pressing mechanism 35 comprises a second water inlet cavity 33 positioned at the right side of the first water inlet cavity 34, a partition plate cavity 39 with a downward opening is arranged on the upper wall of the second water inlet cavity 33, a driven cavity 40 is arranged in the first water inlet cavity 34, a partition plate 37 capable of moving up and down in the partition plate cavity 39 is arranged in the partition plate cavity, the upper end face of the partition board 37 is fixedly provided with a tension spring 38 connected with the upper cavity wall of the partition board cavity 39, the driven cavity 40 is internally provided with a rack 43 capable of moving up and down in the cavity, the right end face of the upper end of the rack 43 is fixedly connected with a fixed plate 42, the lower end face of the fixed plate 42 is fixedly provided with an elastic spring 41 connected with the lower cavity wall of the driven cavity 40, the lower end face of the rack 43 is fixedly provided with a piston plate 45 capable of moving up and down in the first water inlet cavity 34, the right cavity wall of the transmission cavity 48 is rotatably connected with a driven gear 46 with the left end extending into the left cavity wall of the partition board cavity 39, the left end of the driven gear 46 is provided with a first sector gear 36 engaged and connected with the front end face of the partition board 37, the left end of the first sector gear 36 is further provided with a second sector gear 44 engaged and connected with the rack 43, and the right end, the upper end face of the right end of the piston plate 45 is fixedly connected with a hemp rope 73, the right cavity wall of the filter cavity 16 is provided with a moving cavity 56 with a leftward opening, a moving block 57 capable of moving up and down in the moving cavity is arranged in the moving cavity 56, the lower cavity wall of the moving block 57 is provided with 13 and is connected with the lower cavity wall of the moving cavity 56, one end of a cotton rope 58 is fixedly connected with the right end face of the moving block 57, the left end face of the moving block 57 is fixedly connected with a floating plate 14, the device provides power through the transmission mechanism 53, sewage is treated through the filter plate 17, whether dust and oil stains separated from the sewage need to be washed or not is sensed through the first water inlet cavity 34, and finally the dust and the oil stains are washed and collected in a centralized mode through.

Advantageously, the transmission mechanism 53 includes a motor 52 fixed on the right wall of the transmission cavity 48, a transmission shaft 66 is dynamically connected to the left end of the motor 52, a sliding gear 68 is keyed to the left end of the transmission shaft 66, a sliding cavity 67 with a left opening is formed in the sliding gear 68, a sliding block 64 capable of sliding in the sliding cavity is formed in the sliding cavity 67, one end of the wire 58 is fixedly connected to the left end face of the sliding block 64, an annular plate 70 located on the right side of the sliding gear 68 is arranged at the right end of the transmission shaft 66, and two extension springs 69 are fixedly arranged on the left end face of the annular plate 70 and connected to the right end face of the sliding gear.

Beneficially, the filtering mechanism 11 comprises a lifting chamber 20 arranged on the left chamber wall and the right chamber wall of the filtering chamber 16, a lifting block 21 capable of moving up and down in the chamber is arranged in each lifting chamber 20, a compression spring 19 connected with the lower chamber wall of the lifting chamber 20 is arranged on the lower end face of each lifting block 21, a pull rope 12 is fixedly connected with the upper end face of the lifting block 21 on the right side, a filter plate 17 is fixedly connected between the two lifting blocks 21, the filter plate 17 can move up and down in the filtering chamber 16, a push rod chamber 51 with an upward opening is arranged on the lower chamber wall of the transmission chamber 48, a push rod 50 capable of moving up and down in the chamber is arranged in the push rod chamber 51, a return spring 55 is fixedly arranged on the lower end face of the push rod 50 and connected with the lower chamber wall of the push rod chamber 51, one end of the pull rope 12 is fixedly connected with the left end face of the push rod 50, a water outlet 15, the left end of the transmission shaft 66 is provided with a cam 49 positioned on the upper side of the push rod 50.

Beneficially, the flushing mechanism 25 includes a collecting chamber 10 located on the right side of the filtering chamber 16, a through hole 65 communicating with the filtering chamber 16 is arranged on the left chamber wall of the collecting chamber 10, a baffle chamber 59 is arranged in the through hole 65, a pressure spring 62 is fixedly arranged on the upper end face of a baffle 63 capable of moving up and down in the chamber is arranged in the baffle chamber 59 and connected with the upper chamber wall of the baffle chamber 59, one end of the hemp rope 73 is connected with the upper end face of the baffle 63, a sundry outlet 60 communicating with the external space is arranged on the right chamber wall of the collecting chamber 10, a pipeline 24 is arranged outside the left chamber wall of the filtering chamber 16, a baffle chamber 23 is arranged in the pipeline 24, a baffle 22 capable of moving up and down in the baffle chamber 23 is arranged in the baffle chamber 23, a telescopic spring 26 connected with the upper chamber wall of the baffle chamber 23 is fixedly arranged on the upper end face of the baffle 22, a string 27 is fixedly connected with the upper end face of the baffle 22, a pressing block 32 capable of moving up and down in the pressing block cavity 28 is arranged in the pressing block cavity 28, an elastic spring 30 connected with the lower cavity wall of the pressing block cavity 28 is fixedly arranged on the lower end face of the pressing block 32, one end of the string 27 is fixedly connected to the left end face of the pressing block 32, and a water inlet 29 communicated with the external space is formed in the left cavity wall of the second water inlet cavity 33.

Advantageously, in the initial state, the floating plate 14 and the moving block 57 are located at the lower end in the moving chamber 56.

Advantageously, in the initial condition, the sliding gear 68 is disconnected from the driven gear 46, and the tension of the tension spring 69 is greater than the friction force to which the sliding gear 68 is subjected when sliding on the transmission shaft 66.

Advantageously, in the initial condition, the diaphragm 37 and the rack 43 are located in the diaphragm chamber 39 and the driven chamber 40, respectively, under the tension of the tension spring 38 and the elastic spring 41.

Sequence of mechanical actions of the whole device:

1: the sewage after the cleaning of the engine flows into the second water inlet cavity 33 through the water inlet 29 and finally flows into the filter cavity 16 through the first water inlet cavity 34, the dust and oil stains in the sewage are left on the upper surface of the filter plate 17 under the filtering action of the filter plate 17, and the filtered water flows out through the water outlet 15;

2: the motor 52 is started, the motor 52 works to drive the transmission shaft 66 to rotate, so that the sliding gear 68 and the cam 49 are driven to rotate, when the cam 49 rotates to enable the convex part to be abutted against the push rod 50, the push rod 50 is pushed to move downwards, the pull rope 12 is tensioned, the two lifting blocks 21 and the filter plate 17 are pulled to move upwards, when the cam 49 rotates to enable the convex part not to be abutted against the push rod 50, the push rod 50 moves upwards under the action of the reset spring 55, the pull rope 12 is loosened, the two lifting blocks 21 and the filter plate 17 move downwards under the action of the two compression springs 19, and the reciprocating motion forms a vibration effect so as to accelerate the filtering effect of the filter plate 17 on water;

3: when dust and oil stains are accumulated on the filter plate 17, the filtering speed of water on the filter plate 17 is reduced, water is accumulated in the filter chamber 16, the floating plate 14 moves upwards under the buoyancy of the water to drive the moving block 57 to move upwards to tension the cord 58, the sliding gear 68 moves leftwards under the tension of the cord 58 to be meshed with the driven gear 46 to drive the driven gear 46 to rotate, the driven gear 46 rotates to drive the second sector gear 44 and the first sector gear 36 to rotate, so as to drive the rack 43 and the partition plate 37 which are meshed with the second sector gear to move downwards, the partition plate 37 moves downwards to seal the first water inlet chamber 34 to form a closed space, at the moment, the water is stopped to enter into the water inlet 29, the rack 43 descends to drive the piston plate 45 to move downwards to extrude the water in the first water inlet chamber 34, when the first sector gear 36 and the second sector gear 44 rotate until the toothless part is disengaged from the partition plate 37 and the rack 43, the rack 43 and the partition plate 37 move upwards under the action of the tension of the elastic spring 41 and the tension spring 38 respectively, so that dust and oil stains in the filter cavity 16 are stirred to promote the water level to drop in a reciprocating mode until the water level drops, and the floating plate 14 and the moving block 57 move downwards under the action of the spring 13 to reset;

4: when the piston plate 45 moves downwards, the hemp rope 73 is slowly tensioned, when the separation plate 37 moves downwards to start to extrude the pressing block 32, the hemp rope 73 is completely tensioned, the baffle 63 moves upwards under the action of the tension of the hemp rope 73, the collecting cavity 10 is communicated with the filtering cavity 16 through the through hole 65, when the separation plate 37 moves downwards to extrude the pressing block 32, the pressing block 32 moves downwards, the thin rope 27 is tensioned, the stopper 22 is pulled upwards by the thin rope 27, the pipeline 24 is communicated, and water in the pipeline 24 pushes the blockage on the filtering plate 17 into the through hole 65 and flows into the collecting cavity 10;

5: after the blockage on the filter plate 17 is cleaned, the water level in the filter chamber 16 descends, the floating plate 14 and the moving block 57 descend under the action of the floating plate 13, the sliding gear 68 loses the tension of the cord 58 and moves rightwards under the tension of the tension spring 69 to be disengaged from the driven gear 46 to complete reset, the driven gear 46 stops rotating, the driven shaft 47, the first sector gear 36 and the second sector gear 44 stop rotating, and the partition plate 37 and the rack 43 move upwards under the action of the tension spring 38 and the elastic spring 41 to reset respectively.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

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