阅读说明：本技术 一种地下水开采系统 (Underground water exploitation system ) 是由 钱飞 陈小云 沈俊 周粉华 陈婷婷 何硕 许飞飞 王婷 贾心宇 于 2020-05-28 设计创作，主要内容包括：本发明实施例提供的地下水开采系统,包括：取水装置、固定台、超声水位仪、升降结构、罩体、升降杆、控制器、电源；取水装置包括电磁继电器、取水管道、水泵；电磁继电器包括继电器线圈、继电器常闭触点、电磁阀；固定台上的升降结构控制升降杆向观测井内运动,移动至预定距离后停止,超声水位仪实时监测其距离地下水面的距离,并将上述距离实时传输至控制器,在上述控制器中预先设定许可开采范围,当地下水位超出预定范围时,控制器控制继电器线圈得电,继电器常闭触点断开,电磁阀断电断开,取水管道断开,停止从地下水中抽取水,水泵停止工作,采用本发明实施例提供的地下水开采系统,有效的预防了地下水的过度开采,合理利用地下水资源。(The groundwater mining system provided by the embodiment of the invention comprises: the device comprises a water taking device, a fixed platform, an ultrasonic water level meter, a lifting structure, a cover body, a lifting rod, a controller and a power supply; the water taking device comprises an electromagnetic relay, a water taking pipeline and a water pump; the electromagnetic relay comprises a relay coil, a relay normally closed contact and an electromagnetic valve; the lifting structure on the fixed platform controls the lifting rod to move towards the observation well and stop after moving to a preset distance, the ultrasonic water level meter monitors the distance between the ultrasonic water level meter and the underground water surface in real time and transmits the distance to the controller in real time, an allowable exploitation range is preset in the controller, when the underground water level exceeds the preset range, the controller controls the relay coil to be electrified, the normally closed contact of the relay is disconnected, the electromagnetic valve is disconnected, the water taking pipeline is disconnected, water is stopped being extracted from the underground water, and the water pump stops working.)

1. An underground water mining system, comprising: the device comprises a water taking device, a fixed platform, an ultrasonic water level meter, a lifting structure, a cover body, a lifting rod, a controller and a power supply;

the water taking device comprises an electromagnetic relay, a water taking pipeline and a water pump; the electromagnetic relay comprises a relay coil, a relay normally closed contact and an electromagnetic valve; the controller is connected with the relay coil in a control mode, and the controller controls the relay coil to be powered on or powered off; the input end of the relay coil is connected with the controller, the output end of the relay coil is connected with the negative electrode of the power supply, the output end of the relay coil is connected with the normally closed relay contact in a control mode, and the electromagnetic valve is connected to a connecting line of the relay coil and the normally closed relay contact in series; the electromagnetic valve is arranged on the water intake pipeline and controls the on-off of the water intake pipeline; the positive electrode of the power supply is electrically connected with the power supply input end of the controller;

a plurality of supporting structures are arranged at the bottom of the fixed table and used for supporting the fixed table to a preset height;

the lifting structure is connected with the lifting rod in a driving mode, the driving structure drives the lifting rod to move up and down, and the axis of the lifting rod is perpendicular to the horizontal plane;

the cover body is of a semi-surrounding structure, one end of the lifting rod is connected to the top of the cover body, and the controller is connected with the ultrasonic water level meter through a shielded cable; the ultrasonic water level meter is positioned in the cover body, and the working direction of the ultrasonic water level meter faces to the opening of the cover body.

2. A groundwater mining system as claimed in claim 1, wherein the cover is made of toughened glass or hard steel.

3. A groundwater mining system as claimed in claim 1, wherein the lifting structure comprises a limiting portion, a drive motor, a drive gear; the lifting rod comprises a lifting rod and is characterized in that a gear strip is fixedly arranged on the side wall of the lifting rod, a driving gear is meshed with the gear strip, a limiting part is of a cylinder structure, a through hole is formed in the axis direction of the limiting part, the through hole is matched with the lifting rod, the lifting rod is movably connected with the through hole, a plurality of spherical hinge structures are arranged on the side wall of the through hole, the spherical hinge structures are uniformly distributed on the inner wall of the through hole, and the height range of the side wall of the through hole is 1-2 mm.

4. A groundwater mining system as claimed in claim 3, wherein the controller controls the drive motor to rotate forward, reverse or stop.

5. A groundwater mining system as claimed in claim 1, wherein the predetermined height is 10-50 cm.

6. A groundwater mining system as claimed in claim 1, wherein the ultrasonic water level gauge comprises a high frequency pulse transmitter, a high frequency pulse receiver, a timer;

the controller is connected with the high-frequency pulse transmitter and the timer in a control mode; the controller is communicatively coupled to the high frequency pulse receiver.

7. A groundwater mining system as claimed in claim 6, wherein the high frequency pulse transmitter transmits sound waves at a frequency of 60-80 kHz.

Technical Field

The invention relates to the technical field of underground water exploitation equipment, in particular to an underground water exploitation system.

Background

Water shortage becomes a serious problem threatening human survival, and under such a situation, water conservation becomes an imminent social problem. Due to the shortage of water resources, the phenomenon of underground water super-exploitation generally exists, so that the water environment problem caused by the phenomenon becomes serious day by day, and serious negative effects are generated on the sustainable development of economy and the sustainable utilization of water resources. However, there is no effective solution for preventing the over-exploitation of groundwater other than manual measurement.

Disclosure of Invention

In order to solve the technical problem that excessive exploitation of underground water cannot be controlled in the prior art, the embodiment of the invention aims to provide an underground water exploitation system, and the specific technical scheme is as follows:

an embodiment of the present invention provides an underground water mining system, including: the device comprises a water taking device, a fixed platform, an ultrasonic water level meter, a lifting structure, a cover body, a lifting rod, a controller and a power supply;

the water taking device comprises an electromagnetic relay, a water taking pipeline and a water pump; the electromagnetic relay comprises a relay coil, a relay normally closed contact and an electromagnetic valve; the controller is connected with the relay coil in a control mode, and the controller controls the relay coil to be powered on or powered off; the input end of the relay coil is connected with the controller, the output end of the relay coil is connected with the negative electrode of the power supply, the output end of the relay coil is connected with the normally closed relay contact in a control mode, and the electromagnetic valve is connected to a connecting line of the relay coil and the normally closed relay contact in series; the electromagnetic valve is arranged on the water intake pipeline and controls the on-off of the water intake pipeline; the positive electrode of the power supply is electrically connected with the power supply input end of the controller;

a plurality of supporting structures are arranged at the bottom of the fixed table and used for supporting the fixed table to a preset height;

the lifting structure is connected with the lifting rod in a driving mode, the driving structure drives the lifting rod to move up and down, and the axis of the lifting rod is perpendicular to the horizontal plane;

the cover body is of a semi-surrounding structure, one end of the lifting rod is connected to the top of the cover body, and the controller is connected with the ultrasonic water level meter through a shielded cable; the ultrasonic water level meter is positioned in the cover body, and the working direction of the ultrasonic water level meter faces to the opening of the cover body.

Optionally, the cover body is made of tempered glass or hard steel.

Optionally, the lifting structure comprises a limiting part, a driving motor and a driving gear; the lifting rod comprises a lifting rod and is characterized in that a gear strip is fixedly arranged on the side wall of the lifting rod, a driving gear is meshed with the gear strip, a limiting part is of a cylinder structure, a through hole is formed in the axis direction of the limiting part, the through hole is matched with the lifting rod, the lifting rod is movably connected with the through hole, a plurality of spherical hinge structures are arranged on the side wall of the through hole, the spherical hinge structures are uniformly distributed on the inner wall of the through hole, and the height range of the side wall of the through hole is 1-2 mm.

Optionally, the controller controls the driving motor to rotate forward, backward or stop.

Optionally, the predetermined height is 10-50 cm.

Optionally, the ultrasonic water level meter comprises a high-frequency pulse transmitter, a high-frequency pulse receiver and a timer;

the controller is connected with the high-frequency pulse transmitter and the timer in a control mode; the controller is communicatively coupled to the high frequency pulse receiver.

Optionally, the frequency of the sound wave sent by the high-frequency pulse transmitter is 60-80 kHz.

The underground water exploitation system provided by the embodiment of the invention comprises: the device comprises a water taking device, a fixed platform, an ultrasonic water level meter, a lifting structure, a cover body, a lifting rod, a controller and a power supply; the water taking device comprises an electromagnetic relay, a water taking pipeline and a water pump; the electromagnetic relay comprises a relay coil, a relay normally closed contact and an electromagnetic valve; the controller is connected with the relay coil in a control mode, and the controller controls the relay coil to be powered on or powered off; the input end of the relay coil is connected with the controller, the output end of the relay coil is connected with the negative electrode of the power supply, the output end of the relay coil is connected with the normally closed contact of the relay in a control mode, and the electromagnetic valve is connected in series on a connecting line of the relay coil and the normally closed contact of the relay; the electromagnetic valve is arranged on the water taking pipeline and controls the on-off of the water taking pipeline; the positive pole of the power supply is electrically connected with the power supply input end of the controller; a plurality of supporting structures are arranged at the bottom of the fixed table and used for supporting the fixed table to a preset height; the lifting structure is connected with the lifting rod driving structure in a driving mode to drive the lifting rod to move up and down, and the axis of the lifting rod is perpendicular to the horizontal plane; the cover body is of a semi-surrounding structure, one end of the lifting rod is connected to the top of the cover body, and the controller is connected with the ultrasonic water level meter through a shielded cable; the ultrasonic water level meter is positioned in the cover body, and the working direction of the ultrasonic water level meter faces to the opening of the cover body.

In practical application, a lifting structure fixed on a fixed platform is utilized to control a lifting rod to move towards an observation well until one end of the lifting rod, which is provided with an ultrasonic water level meter, moves to a preset distance from underground water, and then the lifting rod stops moving, wherein the preset distance can be 100cm or 200 cm; at the moment, the lifting structure stops working, the lifting rod and the fixing table are in relatively fixed positions, the ultrasonic water level meter monitors the distance from the underground water surface in real time and transmits the distance to the controller in real time, and a cover body surrounding the ultrasonic water level meter is arranged on the outer side of the ultrasonic water level meter, so that the phenomenon that the ultrasonic water level meter is suspended by foreign matters on the side wall of an observation well in the descending process of the ultrasonic water level meter in the observation well to cause deviation of the working direction of the ultrasonic water level meter and further influence the detection accuracy of the ultrasonic water level meter is avoided; the controller is connected with the ultrasonic water level meter through the shielded cable, so that the data detected by the ultrasonic water level meter can be accurately transmitted to the controller, and the influence of external signals on the signal transmission between the ultrasonic water level meter and the controller is reduced as much as possible; an allowable mining range is preset in the controller, when the preset distance is 100cm, the allowable mining range can be 100 plus 150cm, namely when the groundwater level is lower than the current groundwater level and exceeds 50cm, the controller controls the relay coil to be electrified, at the moment, the relay coil controls the normally closed contact of the relay to be disconnected, at the moment, the electromagnetic valve on a connecting line of the relay coil and the normally closed contact of the relay is disconnected in a power-off mode, at the moment, the water taking pipeline controlled by the electromagnetic valve is disconnected, water is stopped being taken out from the groundwater, meanwhile, the controller controls the water pump to stop working, energy is saved, meanwhile, the water pump is prevented from idling, the water pump is prevented from being in fault, the allowable mining range can be set according to the actual condition of a user, and when the distance monitored by the ultrasonic water level meter is within the allowable mining range, the controller controls the relay, the relay normally closed contact outage is closed, is located the solenoid valve circular telegram intercommunication on the interconnecting link of relay coil and relay normally closed contact, and solenoid valve control water intaking pipeline intercommunication, and at this moment, controller control water pump power supply work, the water pump is taken groundwater out via water intaking pipeline, is used by the user. By adopting the underground water mining system provided by the embodiment of the invention, the excessive mining of underground water is effectively prevented, and underground water resources are reasonably utilized.

Drawings

In order to more clearly illustrate the embodiments of the present 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.

Fig. 1 is a schematic structural view of an underground water producing system according to an embodiment of the present invention;

fig. 2 is a schematic view of a connection structure of a water intake device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a lifting structure according to an embodiment of the present invention;

fig. 4 is a schematic diagram of control connection provided in the embodiment of the present invention.

Reference numerals:

the device comprises a water taking device 1, a fixing table 2, an ultrasonic water level meter 3, a lifting structure 4, a cover body 5, a lifting rod 6, a controller 7, a power supply 8, an electromagnetic relay 9, a water taking pipeline 10, a water pump 11, a relay coil 12, a relay normally closed contact 13, an electromagnetic valve 14, a support structure 15, a shielded cable 16, a limiting part 17, a driving motor 18, a driving gear 19, a gear rack 20, a spherical hinge structure 21, a pulse transmitter 22, a pulse receiver 23 and a timer 24.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides an underground water mining system, including: the device comprises a water taking device 1, a fixed table 2, an ultrasonic water level meter 3, a lifting structure 4, a cover body 5, a lifting rod 6, a controller 7 and a power supply 8;

the water taking device 1 comprises an electromagnetic relay 9, a water taking pipeline 10 and a water pump 11; the electromagnetic relay 9 comprises a relay coil 12, a relay normally closed contact 13 and an electromagnetic valve 14; the controller 7 is connected with the relay coil 12 in a control mode, and the controller 7 controls the relay coil 12 to be powered on or powered off; the input end of the relay coil 12 is connected with the controller 7, the output end of the relay coil 12 is connected with the negative electrode of the power supply 8, the output end of the relay coil 12 is connected with the relay normally closed contact 13 in a control mode, and the electromagnetic valve 14 is connected in series on a connecting line of the relay coil 12 and the relay normally closed contact 13; the electromagnetic valve 14 is arranged on the water intake pipeline 10, and the electromagnetic valve 14 controls the on-off of the water intake pipeline 10; the positive electrode of the power supply 8 is electrically connected with the input end of the power supply 8 of the controller 7;

a plurality of support structures 15 are arranged at the bottom of the fixed table 2, and the support structures 15 are used for supporting the fixed table 2 to a preset height;

the lifting structure 4 is connected with the lifting rod 6 in a driving mode, the driving structure drives the lifting rod 6 to move up and down, and the axis of the lifting rod 6 is perpendicular to the horizontal plane;

the cover body 5 is of a semi-surrounding structure, one end of the lifting rod 6 is connected to the top of the cover body 5, and the controller 7 is connected with the ultrasonic water level meter 3 through a shielded cable 16; the ultrasonic water level meter 3 is positioned in the cover body 5, and the working direction of the ultrasonic water level meter 3 faces to the opening of the cover body 5.

Specifically, in practical application, the lifting structure 4 fixed on the fixed table 2 is used for controlling the lifting rod 6 to move towards the observation well until the end, provided with the ultrasonic water level meter 3, of the lifting rod 6 moves to a preset distance from underground water, and then the lifting rod stops moving, wherein the preset distance can be 100cm or 200 cm; at the moment, the lifting structure 4 stops working, the lifting rod 6 and the fixed platform 2 are in relatively fixed positions, the ultrasonic water level meter 3 monitors the distance from the underground water surface in real time and transmits the distance to the controller 7 in real time, and a cover body 5 surrounding the ultrasonic water level meter 3 is arranged on the outer side of the ultrasonic water level meter 3, so that the phenomenon that the ultrasonic water level meter 3 is suspended by foreign matters on the side wall of an observation well in the descending process of the ultrasonic water level meter 3 in the observation well to cause the working direction deviation of the ultrasonic water level meter 3 and further influence the detection accuracy of the ultrasonic water level meter is avoided; the controller 7 is connected with the ultrasonic water level meter 3 through a shielded cable 16, so that data detected by the ultrasonic water level meter 3 can be accurately transmitted to the controller 7, and the influence of external signals on signal transmission between the ultrasonic water level meter 3 and the controller 7 is reduced as much as possible; an allowable mining range is preset in the controller 7, when the preset distance is 100cm, the allowable mining range can be 100 plus 150cm, namely when the groundwater level is lower than the current groundwater level and exceeds 50cm, the controller 7 controls the relay coil 12 to be electrified, at the moment, the relay coil 12 controls the relay normally-closed contact 13 to be disconnected, at the moment, the electromagnetic valve 14 on a connecting line of the relay coil 12 and the relay normally-closed contact 13 is disconnected in an outage way, at the moment, the water taking pipeline 10 controlled by the electromagnetic valve 14 is disconnected, water is taken out of groundwater, at the same time, the controller 7 controls the water pump 11 to stop working, energy is saved, meanwhile, the water pump 11 is prevented from idling, the water pump 11 is prevented from being in fault, the allowable mining range can be set according to the actual conditions of users, when the distance monitored by the ultrasonic water level meter 3 is within the allowable mining range, controller 7 control relay coil 12 outage, relay normally closed contact 13 outage closure, the solenoid valve 14 that is located on relay coil 12 and relay normally closed contact 13's the interconnecting link communicates with each other, and solenoid valve 14 control water intaking pipeline 10 communicates, and at this moment, controller 7 control water pump 11 power supply work, and water pump 11 is taken groundwater out via water intaking pipeline 10, is used by the user. By adopting the underground water mining system provided by the embodiment of the invention, the excessive mining of underground water is effectively prevented, and underground water resources are reasonably utilized.

Further, the cover body 5 is made of tempered glass or hard steel.

Further, the lifting structure 4 comprises a limiting part 17, a driving motor 18 and a driving gear 19; the lifting rod comprises a lifting rod 6, and is characterized in that a gear rack 20 is fixedly arranged on the side wall of the lifting rod 6, a driving gear 19 is meshed with the gear rack 20, a limiting part 17 is of a cylinder structure, a through hole is formed in the axis direction of the limiting part 17, the through hole is matched with the lifting rod 6, the lifting rod 6 is movably connected with the through hole, a plurality of spherical hinge structures 21 are arranged on the side wall of the through hole, the spherical hinge structures 21 are uniformly distributed on the inner wall of the through hole, and the height range of the side wall of the through hole is 1-2 mm.

Further, the controller 7 controls the driving motor 18 to rotate forward, backward, or stop. The controller 7 can be a single chip microcomputer, a microprocessor or a programmable controller 7, and the conventional technical means of controlling the driving motor 18 to rotate forwards or backwards by utilizing the existing controller 7 belongs to the technical means in the field. Specifically, in the embodiment of the present invention, the forward rotation or the reverse rotation of the driving motor 18 can realize that the end of the hollow hauling cable, on which the ultrasonic water level meter 3 is installed, ascends or descends in the observation well.

Further, the predetermined height is 10-50 cm.

Further, the ultrasonic water level meter 3 comprises a high-frequency pulse transmitter 22, a high-frequency pulse receiver 23 and a timer 24; the controller 7 is connected with the high-frequency pulse emitter 22 and the timer 24 in a control mode; the controller 7 is communicatively connected to the high frequency pulse receiver 23. The ultrasonic water level meter 3 adopted in the embodiment of the invention is obtained by direct purchase, and the distance measuring method of the ultrasonic water level meter is also a conventional means.

Further, the frequency of the sound wave sent by the high-frequency pulse emitter 22 is 60-80 kHz. In the range of less than 15m, the ultrasonic water level meter 3 emits sound wave with frequency of 60-80kHz, and the distance measurement is most suitable.

The underground water exploitation system provided by the embodiment of the invention comprises: the device comprises a water taking device 1, a fixed table 2, an ultrasonic water level meter 3, a lifting structure 4, a cover body 5, a lifting rod 6, a controller 7 and a power supply 8; the water taking device 1 comprises an electromagnetic relay 9, a water taking pipeline 10 and a water pump 11; the electromagnetic relay 9 comprises a relay coil 12, a relay normally closed contact 13 and an electromagnetic valve 14; the controller 7 is connected with the relay coil 12 in a control mode, and the controller 7 controls the relay coil 12 to be powered on or powered off; the input end of the relay coil 12 is connected with the controller 7, the output end of the relay coil 12 is connected with the negative electrode of the power supply 8, the output end of the relay coil 12 is connected with the relay normally closed contact 13 in a control mode, and the electromagnetic valve 14 is connected in series on a connecting line of the relay coil 12 and the relay normally closed contact 13; the electromagnetic valve 14 is arranged on the water intake pipeline 10, and the electromagnetic valve 14 controls the on-off of the water intake pipeline 10; the positive electrode of the power supply 8 is electrically connected with the input end of the power supply 8 of the controller 7; a plurality of support structures 15 are provided at the bottom of the fixed stage 2, the support structures 15 being used to support the fixed stage 2 to a predetermined height; the lifting structure 4 is connected with the lifting rod 6 in a driving way, the driving structure drives the lifting rod 6 to move up and down, and the axis of the lifting rod 6 is vertical to the horizontal plane; the cover body 5 is of a semi-surrounding structure, one end of the lifting rod 6 is connected to the top of the cover body 5, and the controller 7 is connected with the ultrasonic water level meter 3 through a shielded cable 16; the ultrasonic water level meter 3 is positioned in the cover body 5, and the working direction of the ultrasonic water level meter 3 faces to the opening of the cover body 5.

In practical application, the lifting structure 4 fixed on the fixed table 2 is utilized to control the lifting rod 6 to move towards the observation well until the end, provided with the ultrasonic water level meter 3, of the lifting rod 6 moves to a preset distance from underground water, and then the lifting rod stops moving, wherein the preset distance can be 100cm or 200 cm; at the moment, the lifting structure 4 stops working, the lifting rod 6 and the fixed platform 2 are in relatively fixed positions, the ultrasonic water level meter 3 monitors the distance from the underground water surface in real time and transmits the distance to the controller 7 in real time, and a cover body 5 surrounding the ultrasonic water level meter 3 is arranged on the outer side of the ultrasonic water level meter 3, so that the phenomenon that the ultrasonic water level meter 3 is suspended by foreign matters on the side wall of an observation well in the descending process of the ultrasonic water level meter 3 in the observation well to cause the working direction deviation of the ultrasonic water level meter 3 and further influence the detection accuracy of the ultrasonic water level meter is avoided; the controller 7 is connected with the ultrasonic water level meter 3 through a shielded cable 16, so that data detected by the ultrasonic water level meter 3 can be accurately transmitted to the controller 7, and the influence of external signals on signal transmission between the ultrasonic water level meter 3 and the controller 7 is reduced as much as possible; an allowable mining range is preset in the controller 7, when the preset distance is 100cm, the allowable mining range can be 100 plus 150cm, namely when the groundwater level is lower than the current groundwater level and exceeds 50cm, the controller 7 controls the relay coil 12 to be electrified, at the moment, the relay coil 12 controls the relay normally-closed contact 13 to be disconnected, at the moment, the electromagnetic valve 14 on a connecting line of the relay coil 12 and the relay normally-closed contact 13 is disconnected in an outage way, at the moment, the water taking pipeline 10 controlled by the electromagnetic valve 14 is disconnected, water is taken out of groundwater, at the same time, the controller 7 controls the water pump 11 to stop working, energy is saved, meanwhile, the water pump 11 is prevented from idling, the water pump 11 is prevented from being in fault, the allowable mining range can be set according to the actual conditions of users, when the distance monitored by the ultrasonic water level meter 3 is within the allowable mining range, controller 7 control relay coil 12 outage, relay normally closed contact 13 outage closure, the solenoid valve 14 that is located on relay coil 12 and relay normally closed contact 13's the interconnecting link communicates with each other, and solenoid valve 14 control water intaking pipeline 10 communicates, and at this moment, controller 7 control water pump 11 power supply work, and water pump 11 is taken groundwater out via water intaking pipeline 10, is used by the user. By adopting the underground water mining system provided by the embodiment of the invention, the excessive mining of underground water is effectively prevented, and underground water resources are reasonably utilized.

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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.