阅读说明：本技术 一种音速喷嘴一键自动快换装置 (One-key automatic quick-change device for sonic nozzle ) 是由 陈灿辉 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种音速喷嘴一键自动快换装置,包括驱动机构、运动机构、夹具机构、音速喷嘴机构以及真空管,所述驱动机构的输出轴与所述运动机构连接以驱动所述运动机构进行水平方向上的直线往复运动,所述夹具机构固定连接在所述运动机构上,所述音速喷嘴机构可拆卸设置在夹具机构上,所述夹具机构内设置有供所述音速喷嘴机构气流通过的输气管,所述真空管固定连接在所述驱动机构上,且所述真空管的一端与所述音速喷嘴机构抵接。该装置结构简单,操作简单,能够有效提高音速喷嘴更换效率,而且安装时不需要人工定位,整体受力均匀,不会造成音速喷嘴因磕碰而产生变形或损坏,使得产品质量得到保证,同时提高产品的使用寿命。(The invention discloses a one-key automatic quick change device for a sonic nozzle, which comprises a driving mechanism, a moving mechanism, a fixture mechanism, a sonic nozzle mechanism and a vacuum tube, wherein an output shaft of the driving mechanism is connected with the moving mechanism to drive the moving mechanism to perform linear reciprocating motion in the horizontal direction, the fixture mechanism is fixedly connected to the moving mechanism, the sonic nozzle mechanism is detachably arranged on the fixture mechanism, a gas transmission pipe for allowing airflow of the sonic nozzle mechanism to pass through is arranged in the fixture mechanism, the vacuum tube is fixedly connected to the driving mechanism, and one end of the vacuum tube is abutted against the sonic nozzle mechanism. The device simple structure, easy operation can effectively improve the fast nozzle of sound and change efficiency, does not need artifical location when installing moreover, and whole atress is even, can not cause the fast nozzle of sound to produce because of colliding with and warp or damage for product quality obtains guaranteeing, improves the life of product simultaneously.)

1. The utility model provides an automatic quick change device of sound speed nozzle key which characterized in that, includes actuating mechanism, motion, anchor clamps mechanism, sound speed nozzle mechanism and vacuum tube, actuating mechanism's output shaft with the motion is connected in order to drive the motion carries out the ascending straight reciprocating motion of horizontal direction, anchor clamps mechanism fixed connection be in on the motion, sound speed nozzle mechanism can dismantle the setting on anchor clamps mechanism, be provided with in the anchor clamps mechanism and supply the gas-supply pipe that sound speed nozzle mechanism air current passes through, vacuum tube fixed connection be in on the actuating mechanism, just the one end of vacuum tube with sound speed nozzle mechanism butt.

2. The automatic one-key quick-change device for the sonic nozzle of claim 1, wherein the driving mechanism comprises a cylinder and a cylinder fixing seat, and an output shaft of a transmission rod of the cylinder is connected with the moving mechanism.

3. The automatic one-key quick-change device for the sonic nozzle as claimed in claim 1, wherein the moving mechanism comprises a slide rail and a slide block slidably connected to the slide rail, the slide block is provided with a fixing frame for connecting with the clamping mechanism, and the output end of the driving mechanism is connected with the fixing frame.

4. The automatic one-key quick-change device for the sonic nozzle of claim 1, wherein the fixture mechanism comprises a clamping jaw and a fixture base, the clamping jaw is cylindrical and hollow inside, the sonic nozzle mechanism is in clearance fit with the clamping jaw, and the clamping jaw is fixed on the moving mechanism through the fixture base.

5. The automatic one-key quick change device for the sonic nozzle of claim 1 wherein the sonic nozzle mechanism comprises a sonic nozzle and a nozzle fixture block, the sonic nozzle being nested in the nozzle fixture block.

6. The automatic one-key quick-change device for the sonic nozzle as claimed in claim 5, wherein the nozzle fixing block comprises a fixing block body, and a clamp end and a connecting end respectively arranged at two ends of the fixing block body;

the fixed block body is hollow, and the sonic nozzle is arranged inside the fixed block body;

the clamp end is abutted against the clamp mechanism, a groove for placing a sealing ring is formed in the end face of the clamp end, and the end face of the sonic nozzle is flush with the end face of the clamp end;

the connecting end is abutted to the vacuum tube, the outer diameter of the connecting end is larger than that of the fixing block body, and a vent hole is formed in the middle of the connecting end.

7. The automatic one-key quick-change device for the sonic nozzle of claim 1 wherein the end surface of the vacuum tube abutting the sonic nozzle mechanism is provided with a notch for placing a sealing block.

8. The automatic quick-change device of a sonic nozzle key of claim 1, further comprising a fall prevention mechanism, wherein the fall prevention mechanism comprises a first vertical plate, a first transverse plate and a second vertical plate which are integrally connected, the first vertical plate and the second vertical plate are respectively arranged at two ends of the first transverse plate, the top end of the first vertical plate is provided with a containing port, and the second vertical plate is fixedly connected with the driving mechanism.

9. The automatic one-key quick-change device for the sonic nozzle as claimed in claim 8, wherein the holder is shaped like an arc with two ends recessed along the middle.

10. The automatic one-key quick-change device for sonic nozzle of claim 8 wherein the first vertical plate and the second vertical plate are vertically disposed at two ends of the first horizontal plate respectively, and are oriented in opposite directions, and the first vertical plate is disposed with a support hole for the output shaft to pass through.

Technical Field

The invention relates to the technical field of sonic nozzle accessory equipment, in particular to a one-key automatic quick-change device for a sonic nozzle.

Background

With the international and domestic tightening of emission standards, carburetors as the core components of motorcycles also enter finer air-fuel ratio requirements. When the carburetor is subjected to performance testing, the sonic nozzle equipment for testing needs to be frequently replaced so as to meet the testing requirements of different working conditions.

The existing mode of replacing the sonic nozzle is mostly to manually detach the sonic nozzle fixing device, as shown in fig. 1-2, the sonic nozzle is provided with an upper end cover and a lower end cover which are connected through a bolt buckle, when the sonic nozzle needs to be replaced, the bolt buckle between the upper end cover and the lower end cover is firstly detached through a manual mode, then the bellows is dragged to enable the bellows to contract through a vacuum pipeline adopting a bellows structure, so that the upper end cover and the lower end cover are separated, the sonic nozzle is exposed, then the sonic nozzle is manually taken out and replaced by another specification sonic nozzle, the bellows is loosened and the sonic nozzle is put back into the upper end cover, and finally the bolt buckle is manually fastened for fixation. The manual replacement mode has high requirement on the skill of an operator, high working strength and low replacement efficiency, and often causes the deformation of a mechanism due to uneven stress during installation, and easily causes the poor sealing state of the sealing ring and repeated installation to meet the requirement. All these problems cause the product quality to be difficult to guarantee, and influence the normal production and delivery of the product.

Disclosure of Invention

The invention aims to provide a one-key automatic quick-change device for a sonic nozzle, which has the advantages of simple structure and simple operation, can effectively improve the replacement efficiency of the sonic nozzle, does not need manual positioning during installation, is uniformly stressed integrally, does not cause deformation or damage of the sonic nozzle due to collision, ensures the product quality, and simultaneously prolongs the service life of the product.

In order to solve the problems, the invention is realized according to the following technical scheme:

the invention provides a one-key automatic quick change device for a sonic nozzle, which comprises a driving mechanism, a moving mechanism, a fixture mechanism, a sonic nozzle mechanism and a vacuum tube, wherein an output shaft of the driving mechanism is connected with the moving mechanism to drive the moving mechanism to perform linear reciprocating motion in the horizontal direction, the fixture mechanism is fixedly connected to the moving mechanism, the sonic nozzle mechanism is detachably arranged on the fixture mechanism, a gas transmission pipe for allowing airflow of the sonic nozzle mechanism to pass through is arranged in the fixture mechanism, the vacuum tube is fixedly connected to the driving mechanism, and one end of the vacuum tube is abutted against the sonic nozzle mechanism.

Further, the driving mechanism comprises an air cylinder and an air cylinder fixing seat, and an output shaft of a transmission rod of the air cylinder is connected with the moving mechanism.

Furthermore, the movement mechanism comprises a slide rail and a slide block connected to the slide rail in a sliding manner, a fixing frame used for being connected with the clamp mechanism is arranged on the slide block, and the output end of the driving mechanism is connected with the fixing frame.

Further, the fixture mechanism comprises a clamping jaw and a fixture base, the clamping jaw is in a hollow cylindrical shape, the sonic nozzle mechanism is in clearance fit with the clamping jaw, and the clamping jaw is fixed on the movement mechanism through the fixture base.

Further, the sonic nozzle mechanism comprises a sonic nozzle and a nozzle fixing block, and the sonic nozzle is nested in the nozzle fixing block.

Further, the nozzle fixing block comprises a fixing block body, and a clamp end and a connecting end which are respectively arranged at two ends of the fixing block body;

the fixed block body is hollow, and the sonic nozzle is arranged inside the fixed block body;

the clamp end is abutted against the clamp mechanism, a groove for placing a sealing ring is formed in the end face of the clamp end, and the end face of the sonic nozzle is flush with the end face of the clamp end;

the connecting end is abutted to the vacuum tube, the outer diameter of the connecting end is larger than that of the fixing block body, and a vent hole is formed in the middle of the connecting end.

Furthermore, a notch for placing a sealing block is arranged on the end surface of the vacuum tube, which is abutted to the sonic nozzle mechanism.

Further, still including preventing falling the mechanism, prevent falling the mechanism and include first riser, first diaphragm and the second riser of a body coupling, the first riser with the second riser sets up respectively the both ends of first diaphragm, the top of first riser is provided with flourishing interface, the second riser with actuating mechanism fixed connection.

Furthermore, the containing port is in an arc shape with two ends sunken along the middle.

Further, the first vertical plate and the second vertical plate are respectively vertically arranged at two ends of the first transverse plate and face opposite directions, and a support hole for the output shaft to pass through is formed in the first vertical plate.

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

according to the one-key automatic quick-change device for the sonic nozzle, the sonic nozzle mechanism is clamped on the clamp mechanism, the clamp mechanism is fixedly arranged on the movement mechanism, the movement mechanism is pushed outwards by arranging the driving mechanism, the sonic nozzle mechanism is controlled to be separated from the vacuum tube arranged on the driving mechanism, the sonic nozzle mechanism is exposed, then the sonic nozzle mechanism can be easily taken down and replaced, the movement mechanism is pulled by the driving mechanism after replacement is completed, the sonic nozzle mechanism is connected with the vacuum tube again, and testing can be continuously completed. The device omits the structure of the upper end cover and the lower end cover in the traditional device, reduces the complex processes of disassembling and assembling the upper end cover and the lower end cover in the replacing process, and greatly improves the replacing efficiency of the sonic nozzle. And whole change process no longer need the manual work to go to push and pull, and the location is more accurate, effectively avoids the probability that the sound velocity nozzle damaged because of receiving to collide with in the change process for product quality obtains guaranteeing, improves the life of product simultaneously.

Drawings

Embodiments of the invention are described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic structural view of a prior art apparatus for manually removing a sonic nozzle fixture;

FIG. 2 is a schematic view of a prior art process for manually removing the sonic nozzle fixture;

FIG. 3 is a schematic structural diagram of a one-key automatic quick change device for sonic nozzle according to the present invention;

FIG. 4 is a schematic diagram of the operation process of the one-key automatic quick change device for sonic nozzle according to the present invention;

FIG. 5 is a schematic view of the drive mechanism of the present invention;

FIG. 6 is a schematic view of the motion mechanism of the present invention;

FIG. 7 is a schematic structural view of the clamping mechanism of the present invention;

FIG. 8 is a schematic structural view of the sonic nozzle mechanism of the present invention;

FIG. 9 is a schematic view of the construction of the vacuum tube of the present invention;

FIG. 10 is a schematic view of the structure of the fastening frame of the present invention;

FIG. 11 is a right side view of the holder of FIG. 10;

FIG. 12 is a schematic structural view of the fall arrest mechanism of the present invention;

FIG. 13 is a right side elevational view of the fall arrest mechanism of FIG. 12;

in the figure:

100-manually disassembling the sonic nozzle fixing device; 110-a suspension block; 120-upper end cap; 130-sonic nozzle; 140-bolt fastening; 150-lower end cap; 160-bellows; 200-a drive mechanism; 210-a cylinder; 211-output shaft; 220-cylinder fixing seat; 221-a pipe bore; 230-a workbench fixing block; 300-a motion mechanism; 310-a slide rail; 320-a slide block; 330-slide rail fixing blocks; 340-oil-proof rubber mat; 400-a clamp mechanism; 410-gas delivery pipe; 420-a clamping jaw; 430-a clamp base; 500-sonic nozzle mechanism; 510-nozzle fixing block; 511-fixed block body; 512-connecting end; 513-a clamp end; 514-grooves; 515-a vent; 520-sonic nozzle; 521-air holes; 600-vacuum tube; 610-a notch; 620-sealing block; 700-a fixed mount; 710-vertical plates; 720-transverse plate; 730-shaft hole; 740-reinforcing ribs; 750-through holes; 760-connecting hole; 800-fall prevention mechanism; 810-a first riser; 811-support holes; 812-a fill interface; 820-a first cross plate; 830-a second riser; 840-fixing hole.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and the described embodiments are merely a subset of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 3-13, a one-key automatic quick change device for sonic nozzle 520 includes a driving mechanism 200, a moving mechanism 300, a fixture mechanism 400, a sonic nozzle mechanism 500, and a vacuum tube 600, wherein an output end of the driving mechanism 200 is connected to the moving mechanism 300 to drive the moving mechanism 300 to perform linear reciprocating motion in a horizontal direction, the fixture mechanism 400 is fixedly connected to the moving mechanism 300, the sonic nozzle mechanism 500 is detachably disposed on the fixture mechanism 400, an air pipe 410 for allowing the sonic nozzle mechanism 500 to pass through is disposed in the fixture mechanism 400, the vacuum tube 600 is fixedly connected to the driving mechanism 200, and one end of the vacuum tube 600 is abutted to the sonic nozzle mechanism 500. In the initial state, as shown in fig. 1, the clamp mechanism 400 clamps the sonic nozzle mechanism 500 to abut against an opening at one end of the vacuum tube 600, and the vacuum tube 600 and the sonic nozzle mechanism 500 are communicated with the air pipe 410 of the clamp mechanism 400, so that an air injection test can be performed.

When the sonic nozzle 520 needs to be replaced, as shown in fig. 2, the driving mechanism 200 is such that the output shaft pushes the moving mechanism 300 to move rightward, the sonic nozzle mechanism 500 is separated from the vacuum tube 600, then the sonic nozzle mechanism 500 can be removed from the fixture mechanism 400 for replacing the sonic nozzle 520, after the replacement is completed, the sonic nozzle mechanism 500 is put back into the fixture mechanism 400, the output shaft of the driving mechanism 200 is controlled to contract, the moving mechanism 300 is pulled to move leftward until the sonic nozzle mechanism 500 abuts against the vacuum tube 600 again, and the initial test preparation state is returned. Through adopting this device for the change of sound velocity nozzle 520 is simple swift, does not need artifical location moreover, and whole atress is even, can not cause sound velocity nozzle 520 to produce because of colliding with and warp or damage, makes product quality obtain guaranteeing, improves the life of product simultaneously.

Specifically, the driving mechanism 200 includes an air cylinder 210 and an air cylinder fixing seat 220 for fixing the air cylinder 210, and the air cylinder 210 is fixedly installed on the air cylinder fixing seat 220. The moving mechanism 300 comprises a slide rail 310 and a slide block 320 connected to the slide rail 310 in a sliding manner, a fixing frame 700 used for being connected with the clamp mechanism 400 is arranged on the slide block 320, the fixing frame 700 is L-shaped and comprises a vertical plate 710 and a transverse plate 720, and an output shaft of the air cylinder 210 is connected with the vertical plate 710 of the fixing frame 700. The vertical plate 710 is provided with a shaft hole 730 for inserting an output shaft, the output shaft of the air cylinder 210 is inserted into the shaft hole 730 from one end of the vertical plate 710, and the other end of the vertical plate 710 fixes the output shaft in the shaft hole 730 by using a fastener, so that the output shaft is fixedly connected with the fixing frame 700, and the output shaft can realize the push-pull movement of the fixing frame 700. In this embodiment, the fastening member may be a screw or a bolt. Still be provided with strengthening rib 740 between vertical board 710 and the horizontal board 720 of mount 700 for improve the stability of mount 700, avoid anchor clamps mechanism 400 to take place the skew and lead to gas leakage or cause unexpected emergence such as colliding with to sonic nozzle mechanism 500.

The clamp mechanism 400 includes a clamping jaw 420 and a clamp base 430, the clamping jaw 420 is integrally connected with the clamp base 430, the clamping jaw 420 is in a hollow cylindrical shape, the sonic nozzle mechanism 500 is sleeved in the clamping jaw 420, and the sonic nozzle mechanism 500 is in clearance fit with the clamping jaw 420. The clamping jaw 420 is connected with the fixing frame 700 through the clamp base 430, and the vertical plate 710 of the fixing frame 700 is provided with a through hole 750 for the clamping jaw 420 to pass through and a plurality of connecting holes 760 for fixedly connecting with the clamp base 430. The air pipe 410 inside the clamp mechanism 400 penetrates the clamping jaw 420 and communicates with the air hole 521 of the sonic nozzle 520.

The sonic nozzle mechanism 500 includes a sonic nozzle 520 and a nozzle fixing block 510, the nozzle fixing block 510 includes a fixing block body 511, and a clamp end 513 and a connection end 512 disposed at both ends of the fixing block body 511, the fixing block body 511 is cylindrical with a hollow interior, and the sonic nozzle 520 is embedded in the fixing block body 511. The clamp end 513 abuts against the bottom surface of the inside of the clamping jaw 420, the outer diameter and the inner diameter of the clamp end 513 are the same as those of the fixed block body 511, and one end surface of the sonic nozzle 520 is flush with the end surface of the clamp end 513. Be provided with the recess 514 that is used for placing the sealing washer on the terminal surface of anchor clamps end 513, through placing the sealing washer in recess 514, can effectively guarantee that the leakproofness is good between anchor clamps end 513 and the inside bottom surface of clamping jaw 420, avoids the problem of gas leakage. The connecting end 512 is abutted against the end face of the vacuum tube 600, and the middle part of the connecting end 512 is provided with a vent hole 515 for communicating the vacuum tube 600 with the air hole 521 of the sonic nozzle 520. The outer diameter of the connecting end 512 is larger than that of the fixing block body 511, so that the contact area between the connecting end 512 and the end face of the vacuum tube 600 is increased, the impact force of the vacuum tube 600 on the sonic nozzle mechanism 500 during the operation of replacing the sonic nozzle 520 is reduced, the sonic nozzle mechanism 500 is protected, and the service life is prolonged. Meanwhile, the contact area between the connecting end 512 and the end face of the vacuum tube 600 is increased, which is beneficial to improving the tightness between the connecting end 512 and the end face of the vacuum tube 600.

More preferably, the end surface of the vacuum tube 600 abutting against the sonic nozzle mechanism 500 is provided with a notch 610 for placing a sealing block 620, and the sealing block 620 is arranged at the notch 610, so that the tightness between the sonic nozzle mechanism 500 and the vacuum tube 600 is enhanced, air leakage is prevented, and the accuracy of the test is ensured. The cylinder fixing seat 220 is provided with a pipeline hole 221 for the vacuum pipe 600 to pass through, and the vacuum pipe 600 passes through the pipeline hole 221 and is fixedly installed on the cylinder fixing seat 220.

Still be provided with on this device and prevent falling mechanism 800, prevent falling mechanism 800 including first riser 810, first diaphragm 820 and the second riser 830 of integrative connection, wherein first riser 810 sets up perpendicularly on the both ends of first diaphragm 820 respectively with second riser 830, and the orientation is opposite. The second vertical plate 830 abuts against and is fixed on the cylinder fixing seat 220, a fixing hole 840 is formed in the second vertical plate 830, and the fixing hole 840 penetrates through the second vertical plate 830, the first transverse plate 820 and the first vertical plate 810 simultaneously. Be provided with on the riser 810 and supply the output shaft to pass and play supporting role's support hole 811 to the output shaft, be favorable to guaranteeing to avoid the output shaft to squint downwards under the action of gravity, improve cylinder 210's whole durability. The middle part on the top of first riser 810 is provided with flourishing interface 812, flourishing interface 812 is the arc that both ends are sunken to the centre. If the sonic nozzle 520 accidentally falls off during the taking out process, the drop-preventing mechanism 800 can receive the sonic nozzle 520 through the receiving opening 812 at the top end of the first vertical plate 810, so as to prevent the sonic nozzle 520 from falling off the workbench or the ground. Of course, the receiving opening 812 may be in other shapes, such as V-shape, bowl-shape, etc., as long as it can better achieve the function of receiving the sonic nozzle 520 and avoid the sonic nozzle 520 from falling and being damaged, and such designs all belong to the protection scope of the present invention.

Preferably, in this embodiment, a workbench fixing block 230 is further provided, and the cylinder fixing base 220 is fixedly mounted on the workbench fixing block 230, so as to ensure that the operation of the cylinder 210 is more stable. Meanwhile, the slide rail fixing block 330 is further arranged, the slide rail 310 is fixedly installed above the slide rail fixing block 330, and the oil-proof rubber pad 340 is further arranged below the slide rail fixing block 330 and used for increasing friction force between the slide rail 310 and the slide rail fixing block 330 and a working table surface, so that the slide rail 310 is prevented from being dragged by an output shaft of the cylinder 210 along with the slide block 320, the stroke of the sonic nozzle 520 is insufficient, the sonic nozzle 520 is difficult to take out, and the working efficiency is influenced.

As shown in figures 1-2, most of the prior art adopts the manual disassembly of the sonic nozzle fixing device, the sonic nozzle is sealed by an upper end cover and a lower end cover, and the upper end cover is fixed on a workbench through a suspension block. And the upper end cover and the lower end cover are fixedly connected through a bolt buckle. When the sonic nozzle needs to be replaced, the bolt buckle between the upper end cover and the lower end cover needs to be detached firstly in a manual mode, then the corrugated pipe is dragged downwards to enable the corrugated pipe to contract, the upper end cover and the lower end cover are separated, the sonic nozzle is exposed, the sonic nozzle can be taken out and replaced by the sonic nozzle of another specification, the corrugated pipe is loosened to put the sonic nozzle back into the upper end cover, and the bolt buckle is locked and fixed to seal the upper end cover and the lower end cover. This kind of manual mode of changing, it is big to demolish the process intensity of bolt buckle, and the inefficiency of change causes the atress inequality easily when the bellows is just done manually in the manual work moreover, leads to the sonic nozzle to take place to collide with and lead to the mechanism to warp, also causes easily moreover because artifical location is inaccurate and cause the sealing washer to seal the state not good, needs the repeated installation to just can meet the requirements many times, wastes time and energy.

Compared with the prior art, the one-key automatic quick-change device for the sonic nozzle is characterized in that a traditional vertical installation mode is changed into a horizontal installation mode, and the operation is more convenient. Secondly, through actuating mechanism and motion's cooperation, can stable control sound velocity nozzle take out and install, do not need artifical regulation location for the homoenergetic that the sound velocity nozzle all can remain stable dynamics and angle direction when taking out and installing, can not cause the installation deviation, avoided the sound velocity nozzle to receive to collide with. The device can realize one-key quick change of the sonic nozzle, greatly improve the efficiency of replacing the sonic nozzle, and avoid the problems of errors and mechanism damage in the replacement process of the traditional technical means.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that modifications and variations can be effected by one skilled in the art in light of the above teachings without undue experimentation. Therefore, any technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the present inventive concept should be within the scope of protection defined by the present claims.