阅读说明：本技术 一种用于燃料电池堆的捆扎装置 (Bundling device for fuel cell stack ) 是由 秦如学 李骁 于 2019-12-26 设计创作，主要内容包括：本发明涉及燃料电池捆扎技术领域,提供了一种用于燃料电池堆的捆扎装置。束带紧锁装置包括至少两个带螺纹的锁紧件和底座,所述至少两个带螺纹的锁紧件以转轴方式设置在所述底座上；束带的一端设置有与所述带螺纹的锁紧件数量相匹配的螺孔轨道；所述带螺纹的锁紧件与所述底座的底部之间的间隙距离使得所述束带从底座一侧插入时,所述锁紧件上的螺纹与所述束带上相应的螺孔轨道相耦合。本发明克服了单一螺栓固定方式中,束带通常比较窄,造成燃料电池堆中使用紧固带较多的问题,并且,利用本发明的捆扎装置还能够克服现有技术中采用单一束带中使用多个螺栓来增宽束带方式中,带来的螺栓之间受力不均容易松脱的问题。(The invention relates to the technical field of fuel cell bundling, and provides a bundling device for a fuel cell stack. The strap locking device comprises at least two threaded locking pieces and a base, wherein the at least two threaded locking pieces are arranged on the base in a rotating shaft manner; one end of the binding band is provided with screw hole rails matched with the threaded locking pieces in number; the gap distance between the threaded retaining member and the bottom of the base is such that when the strap is inserted from the side of the base, the threads on the retaining member couple with corresponding threaded hole tracks on the strap. The invention overcomes the problem that the fastening belt is used more in the fuel cell stack because the belt is usually narrower in a single bolt fixing mode, and the binding device can also overcome the problem that the bolts are not uniformly stressed and are easy to loosen in the prior art that the belt is widened by using a plurality of bolts in the single belt.)

1. A strapping device for a fuel cell stack, comprising a strap and a strap locking device, in particular:

the strap locking device comprises at least two threaded locking pieces and a base, wherein the at least two threaded locking pieces are arranged on the base in a rotating shaft manner;

one end of the binding band is provided with screw hole rails matched with the threaded locking pieces in number;

wherein a clearance distance between the threaded retaining member and the bottom of the base is such that when the strap is inserted from the side of the base, threads on the retaining member couple with corresponding threaded hole tracks on the strap.

2. The strapping device for a fuel cell stack according to claim 1, wherein the at least two threaded locking members comprise a first locking member and a second locking member:

the threads of the first locking piece and the second locking piece are clockwise and anticlockwise respectively; alternatively, the first and second electrodes may be,

the threads of the first locking member and the second locking member are clockwise or counterclockwise.

3. The strapping device for a fuel cell stack according to claim 1, wherein the base is provided with a screw-thread transition groove below the corresponding screw-thread of the locker; the thread transition groove enables the thread to overflow the screw hole for a specified length distance when the thread is coupled with the screw hole track.

4. The strapping device for a fuel cell stack according to claim 1, wherein the band locking device further comprises at least one pair of carrying rods, the carrying rods are provided with rotating shaft holes for carrying the locking member connecting rods, wherein the connecting rods at two ends of the locking member are respectively arranged in the rotating shaft holes arranged oppositely in the pair of carrying rods, and the thread on the locking member is positioned in a space region between the pair of carrying rods;

at least two groups of sliding grooves are arranged on the base, and each group of sliding grooves is used for completing embedded fixation of a bearing rod.

5. The strapping device for a fuel cell stack according to claim 4, wherein the strap locking device further comprises a cover plate covering the base for abutting against a carrier bar embedded in the chute.

6. The strapping device for a fuel cell stack according to claim 4, wherein one side of the base is configured to guide a first end of a strap, wherein the first end of the strap is provided with a screw hole track matching the number of the threaded locking members; a fixing hole is formed in the second end of the binding belt, and a protrusion coupled with the fixing hole is correspondingly arranged at the bottom of the other side of the base.

7. The strapping device for a fuel cell stack according to claim 6, wherein the base on the side provided with the protrusion has a space height for accommodating the strap between the bottom of the load bar and the protrusion after the corresponding load bar is pushed into the slide groove, so that the first end of the strap can pass through the space height area during the process of being introduced after the fixing hole of the second end of the strap is fixed on the protrusion.

8. The strapping device for a fuel cell stack according to claim 6, wherein the bottom of the base includes a first layer of through slots leading into a first end of the band, wherein a second layer of through slots are provided in a region of the first layer of through slots located at a second end of the securing band, wherein the second layer of through slots are located above the first layer of through slots, and wherein the protrusions are provided on a surface of the second layer of through slots; so that the second end of the fixed bridle and the first end of the guided bridle respectively present an up-down dislocation structure.

9. The strapping device for a fuel cell stack according to claim 8, wherein a first carrier bar of the pair of carrier bars, which is positioned above the second-layer channel, abuts against a raised surface of the second-layer channel after being inserted into the channel.

10. The strapping device for a fuel cell stack according to claim 4, wherein a pair of the carrier bars, together with the first locking member and the second locking member provided on the pair of the carrier bars, constitute an integrated fitting; the connecting rod end part of the same side of the first locking part and the second locking part is provided with a sleeve cap, and the sleeve cap is used for fixing the initial rotating angle of the first locking part and the initial rotating angle of the second locking part, so that the first locking part and the second locking part are fixed on the symmetrical position through threads.

11. The strapping device for a fuel cell stack according to claim 4, wherein a region of the locker above the projection is a smooth link structure; the locking piece is provided with the screw thread at the side of the leading-in belt with the screw hole track.

12. The strapping device for a fuel cell stack according to any one of claims 1 to 11, wherein the end of the locking member has a bolt head structure including one or more of a hexagonal head, a square head, a cross-shaped countersunk head, a square countersunk head, and a fancy countersunk head.

13. The binding apparatus for a fuel cell stack according to any one of claims 4 to 11, wherein a locking groove is provided above the rotation shaft hole of the support rod, and a locking member link locking spring is provided in the locking groove.

14. A strapping device for a fuel cell stack, comprising a band and a band locking device according to any of claims 1 to 13, and a lock actuator, in particular:

the transmission device of the locking piece is provided with transmission arms with the number matched with that of the locking piece, and the top ends of the transmission arms are used for being coupled with the locking piece; the bottom of each transmission arm is coupled with a respective transmission gear, and each transmission gear completes synchronous rotation in the same direction or synchronous rotation in different directions under the transmission of a main gear of a motor.

15. The strapping device for a fuel cell stack according to claim 14, wherein the first transmission gear and the second transmission gear have the same module and number of teeth, in particular:

when the transmission gears finish synchronous rotation in different directions under the transmission of a main gear of the motor, the main gear is coupled with a first transmission gear, and the first transmission gear is coupled with a second transmission gear; alternatively, the first and second electrodes may be,

when the transmission gears complete synchronous and equidirectional rotation under the transmission of the main gear of the motor, the main gear is respectively coupled with the first transmission gear and the second transmission gear, so that the first transmission gear and the second transmission gear are driven to synchronously rotate in the same direction when the main gear rotates in a single direction.

16. A banding device for a fuel cell stack as claimed in claim 14, characterized in that said locking member actuator further comprises an electric motor, an accumulator and a two-way switch, in particular:

the main gear is fixed on a rotating shaft of the motor; the motor is powered by the storage battery, and the bidirectional switch is connected in series with the storage battery;

the bidirectional switch is used for controlling the electrode to be provided with forward voltage conduction or reverse voltage conduction.

17. A binding method for a fuel cell stack, which is implemented based on the binding apparatus for a fuel cell stack according to any one of claims 1 to 7 and 10 to 13, comprising:

a pair of bearing rods provided with at least two locking pieces are embedded into the sliding grooves of the base and fixedly connected with the corresponding base;

inserting the fixing hole on the second end of the binding belt into the end of the base provided with the bulge, and completing coupling with the corresponding bulge;

inserting the first end of the strap into the other end of the base opposite to the end provided with the protrusion, gradually guiding the first end of the strap into or through the strap locking device by synchronously rotating the locking pieces, and covering the first end of the strap on the second end of the strap.

18. A binding method for a fuel cell stack, which is implemented based on the binding apparatus for a fuel cell stack according to any one of claims 1 to 6 and 8 to 13, comprising:

inserting the fixing hole on the second end of the binding belt into the end of the base provided with the bulge, and completing coupling with the corresponding bulge;

a pair of bearing rods provided with at least two locking pieces are embedded into the sliding grooves of the base and fixedly connected with the corresponding base; wherein, the bottom of the bearing rod positioned at one side of the base provided with the bulge is abutted with the bulge;

inserting the first end of the strap into the other end of the base opposite to the end provided with the protrusion, gradually guiding the first end of the strap into the strap locking device or through the strap locking device by synchronously rotating the locking pieces, and enabling the first end of the strap to pass through the first layer of through grooves.

Technical Field

The invention relates to the technical field of fuel cell bundling, in particular to a bundling device for a fuel cell stack.

Background

A fuel cell is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell) can provide a lower voltage and lower output power. In practice, a plurality of fuel cells are generally stacked together to form a fuel cell stack capable of providing high voltage and high power. Accordingly, since a fuel cell stack of a fuel cell is formed by stacking a plurality of fuel cell cells together, the fuel cell cells of the fuel cell stack must be firmly assembled together to ensure structural stability of the fuel cell stack.

The fuel cell stack of the existing fuel cell is fixed together by a screw rod. However, the fuel cell stack is fixed by the screws, and usually a single-bolt fixing manner is adopted, so that the fuel cell stack is poor in fastening effect easily, and a plurality of fastening belts are needed to realize effective fastening. The wide fastening belt mode of few adoption many bolts realizes because set up a plurality of bolts on a fastening belt, cause the uneven problem of atress easily to cause the problem that the bolt pine takes off more easily.

As shown in fig. 1, a strapping device disclosed in CN102037597A adopts the most conventional single bolt fastening method and fastening straps are matched with the connecting portion of the strap bolts to complete the fastening, but has the typical problem that the width of each fastening strap is small and more fastening straps are needed to complete the whole fuel cell fastening as mentioned above.

As shown in fig. 2, the strapping device disclosed in CN107154503A is more convenient than fig. 1 in terms of convenience of installation, but has a common problem with fig. 1, and still adopts a bolt structure, which may cause a problem that the bolt and the nut are easily loosened in an environment with strong vibration, in addition to the problem that the number of fastening belts at different positions is too large.

As shown in fig. 3, a strapping device disclosed in CN209104283U, which is a more specific strapping device formed by a fastening band and a bolt compared with fig. 1 and 2, is disclosed, and in fig. 3, a base is further used as a fixing force point of the bolt, but it only provides a differentiated fixing mode, but still does not overcome the above problem.

In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a bundling device for a fuel cell stack, which solves the problems that the bundling device in the prior art is poor in stability and easy to cause uneven fastening stress.

The embodiment of the invention further solves the technical problem of how to ensure the storage of the tail end of the binding belt in the binding device provided by the invention.

The embodiment of the invention adopts the following technical scheme:

in a first aspect, the present invention provides a strapping device for a fuel cell stack, including a strap and a strap locking device, specifically:

the strap locking device comprises at least two threaded locking pieces and a base, wherein the at least two threaded locking pieces are arranged on the base in a rotating shaft manner;

one end of the binding band is provided with screw hole rails matched with the threaded locking pieces in number;

wherein a clearance distance between the threaded retaining member and the bottom of the base is such that when the strap is inserted from the side of the base, threads on the retaining member couple with corresponding threaded hole tracks on the strap.

Preferably, the at least two threaded locking members include a first locking member and a second locking member:

the threads of the first locking piece and the second locking piece are clockwise and anticlockwise respectively; alternatively, the first and second electrodes may be,

the threads of the first locking member and the second locking member are clockwise or counterclockwise.

Preferably, a thread transition groove is formed in the base and positioned below the corresponding locking piece thread; the thread transition groove enables the thread to overflow the screw hole for a specified length distance when the thread is coupled with the screw hole track.

Preferably, the strap locking device further comprises at least one pair of bearing rods, wherein the bearing rods are provided with rotating shaft holes for bearing the connecting rods of the locking member, the connecting rods at two ends of the locking member are respectively arranged in the rotating shaft holes in the pair of bearing rods in the opposite layout, and the threads on the locking member are positioned in a space region between the pair of bearing rods;

at least two groups of sliding grooves are arranged on the base, and each group of sliding grooves is used for completing embedded fixation of a bearing rod.

Preferably, the strap locking device further comprises a cover plate, wherein the cover plate covers the base and is used for abutting against the bearing rod embedded in the sliding groove.

Preferably, one side of the base is used for guiding a first end of a binding belt, wherein the first end of the binding belt is provided with screw hole rails matched with the threaded locking pieces in number; a fixing hole is formed in the second end of the binding belt, and a protrusion coupled with the fixing hole is correspondingly arranged at the bottom of the other side of the base.

Preferably, on the base on the side provided with the protrusion, after the corresponding carrying rod is pushed into the sliding groove, a space height for accommodating the strap is arranged between the bottom of the carrying rod and the protrusion, so that after the fixing hole at the second end of the strap is fixed on the protrusion, the first end of the strap can penetrate out of the space height area in the process of being guided in.

Preferably, the bottom of the base comprises a first layer of through grooves leading into the first end of the binding belt, a second layer of through grooves are arranged on the first layer of through grooves in the area of the second end of the fixing binding belt, the second layer of through grooves are arranged on the first layer of through grooves, and the surface of each second layer of through groove is provided with the protrusion; so that the second end of the fixed bridle and the first end of the guided bridle respectively present an up-down dislocation structure.

Preferably, in the pair of carrier bars, the first carrier bar located above the second layer of through groove abuts against the raised surface on the second layer of through groove after being embedded into the sliding groove.

Preferably, the pair of carrying rods, the first locking piece and the second locking piece which are arranged on the pair of carrying rods form an integrated accessory; the connecting rod end part of the same side of the first locking part and the second locking part is provided with a sleeve cap, and the sleeve cap is used for fixing the initial rotating angle of the first locking part and the initial rotating angle of the second locking part, so that the first locking part and the second locking part are fixed on the symmetrical position through threads.

Preferably, the area of the locking member above the projection is of a smooth connecting rod structure; the locking piece is provided with the screw thread at the side of the leading-in belt with the screw hole track.

Preferably, the end of the locking member is in a bolt head structure and comprises one or more of a hexagonal head, a square head, a cross countersunk head, a square countersunk head and a fancy countersunk head.

Preferably, a clamping groove is formed above the rotating shaft hole of the bearing rod, and a spring for clamping the locking piece connecting rod is arranged in the clamping groove.

In a second aspect, the present invention provides a strapping device for a fuel cell stack, including the band and the band locking device of the first aspect, and a lock actuator, specifically:

the transmission device of the locking piece is provided with transmission arms with the number matched with that of the locking piece, and the top ends of the transmission arms are used for being coupled with the locking piece; the bottom of each transmission arm 31 is coupled to a respective transmission gear, and each transmission gear completes synchronous rotation in the same direction or synchronous rotation in different directions under the transmission of a main gear of a motor.

Preferably, the first transmission gear and the second transmission gear have the same module and number of teeth, specifically:

when the transmission gears finish synchronous rotation in different directions under the transmission of a main gear of the motor, the main gear is coupled with a first transmission gear, and the first transmission gear is coupled with a second transmission gear; alternatively, the first and second electrodes may be,

when the transmission gears complete synchronous and equidirectional rotation under the transmission of the main gear of the motor, the main gear is respectively coupled with the first transmission gear and the second transmission gear, so that the first transmission gear and the second transmission gear are driven to synchronously rotate in the same direction when the main gear rotates in a single direction.

Preferably, retaining member transmission still includes motor, battery and two-way switch, and is specific:

the main gear is fixed on a rotating shaft of the motor; the motor is powered by the storage battery, and the bidirectional switch is connected in series with the storage battery;

the bidirectional switch is used for controlling the electrode to be provided with forward voltage conduction or reverse voltage conduction.

In a third aspect, the present invention also provides a bundling method for a fuel cell stack, which is implemented by the bundling apparatus for a fuel cell stack according to the first aspect, including:

a pair of bearing rods provided with at least two locking pieces are embedded into the sliding grooves of the base and fixedly connected with the corresponding base;

inserting the fixing hole on the second end of the binding belt into the end of the base provided with the bulge, and completing coupling with the corresponding bulge;

inserting the first end of the strap into the other end of the base opposite to the end provided with the protrusion, gradually guiding the first end of the strap into or through the strap locking device by synchronously rotating the locking pieces, and covering the first end of the strap on the second end of the strap.

In a fourth aspect, the present invention also provides a bundling method for a fuel cell stack, the method being implemented based on the bundling apparatus for a fuel cell stack of the first aspect, including:

inserting the fixing hole on the second end of the binding belt into the end of the base provided with the bulge, and completing coupling with the corresponding bulge;

a pair of bearing rods provided with at least two locking pieces are embedded into the sliding grooves of the base and fixedly connected with the corresponding base; wherein, the bottom of the bearing rod positioned at one side of the base provided with the bulge is abutted with the bulge;

inserting the first end of the strap into the other end of the base opposite to the end provided with the protrusion, gradually guiding the first end of the strap into the strap locking device or through the strap locking device by synchronously rotating the locking pieces, and enabling the first end of the strap to pass through the first layer of through grooves.

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

the invention adopts at least two locking parts with threads and the screw hole track on the bridle which is matched with the threads for locking and coupling, thereby realizing the effective widening of the bridle (described as a fastening belt in the background technology) in the prior art; the problem that fastening belts are frequently used in a fuel cell stack due to the fact that the belts are usually narrow in a single bolt fixing mode is solved, and the problem that bolts are prone to loosening due to uneven stress in the mode that a plurality of bolts are used in a single belt to widen the belts in the prior art can be solved.

In a preferred mode of the invention, two modes of realizing the position relationship after the setting of the bridle and the leading-in of the bridle are provided, wherein a mode that the first end of the bridle is arranged on the upper side and the second end of the bridle is arranged on the lower side is adopted, the requirement of higher integration level can be met, and the corresponding bridle locking device can be integrally used in factory assembly. And to the first end that adopts the band under, the second end mode on can satisfy the environment requirement of tying up of higher intensity, because, the fixed orifices on the second end docks the back with the arch of base, is through the protruding completion coupling of the direct butt joint of carrier bar, and its suitable intensity is higher.

The binding device provided by the invention is also provided with the locking piece transmission device in a matched manner, and the designed gear transmission mechanism can meet the requirement that at least two locking pieces in a belt locking device can rotate synchronously in the same direction or synchronously in different directions during working, so that the requirement that a corresponding belt is stably led into the belt locking device is met.

[ description of the 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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a banding apparatus for a fuel cell stack according to the prior art;

FIG. 2 is a schematic view of another prior art strapping device for a fuel cell stack according to the present invention;

fig. 3 is a schematic view of a bundling apparatus for a fuel cell stack according to the prior art;

fig. 4-1 is a schematic structural view of a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIG. 4-2 is a schematic view showing a structure of a band locking apparatus in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4-3 are front views of a band locking device in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 4 to 4 are sectional views showing the structures of locking pieces in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4 to 5 are schematic views showing the structures of threads in a locking member of a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4 to 6 are schematic views showing a part of a band locking device in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4 to 7 are schematic structural views of a support rod in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4-8 are schematic views showing the construction of a base of a band locking device in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4-9 are schematic views of a band locking device including a locking spring in a strapping device for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4-10 are schematic views illustrating a band locking device including a cover plate in a strapping apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4-11 are schematic views of the assembled band of the strapping device for a fuel cell stack according to an embodiment of the present invention;

FIGS. 4 to 12 are schematic views showing the structure of a band in an unfolded state in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIG. 5-1 is a schematic view showing a structure of a band locking apparatus in a binding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIG. 5-2 is a front view of a band locking device in a strapping apparatus for a fuel cell stack according to an embodiment of the present invention;

FIG. 6-1 is a schematic view showing another band locking device in the binding apparatus for a fuel cell stack according to the embodiment of the present invention;

FIG. 6-2 is a schematic view showing another structure of a band locking device in the binding apparatus for a fuel cell stack according to the embodiment of the present invention;

FIG. 7-1 is a schematic view of a capped carrier rod assembly of a strapping apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 7-2 is a structural side view of a cap in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 8-1 is a schematic view showing a lock actuator of a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 8-2 is a schematic structural view of a lock actuator in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 8-3 are schematic structural views of a lock actuator in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 8-4 are schematic structural views of a lock actuator in a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 8 to 5 are schematic views showing the structure of a motor in a lock actuator of a banding apparatus for a fuel cell stack according to an embodiment of the present invention;

FIGS. 8-6 are schematic diagrams showing the structure of a control circuit of a lock actuator in a strapping apparatus for a fuel cell stack according to an embodiment of the present invention;

fig. 9 illustrates a method of using a strapping device for a fuel cell stack according to an embodiment of the present invention;

fig. 10 illustrates another method for using a strapping device for a fuel cell stack according to an embodiment of the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention researches the problem that in the prior art, in a single bolt fixing mode, a binding belt is usually narrow, so that a plurality of fastening belts are used in a fuel cell stack. In the prior art, the reason why a single bolt fixing mode is narrower is that once the strap is designed into a wider structure, single bolt fixing easily causes deformation of the strap at a fixing point area due to local stress, and generally, in order to ensure that the strap is not deformed, the strength of the strap needs to be increased, generally, the operation is realized by adopting more expensive high-strength steel or increasing the thickness of the strap, but the operation cannot be accepted by enterprises due to the increase of the cost in the field of fuel cell stacks applied in large batches.

On the other hand, the inventor also considers the research of applying two or more bolts in a wide belt in the research process, but because the fastening force between the bolts is difficult to be consistent, the fastening force of one bolt is easy to be larger, and the fastening force of the other bolt is relatively weaker, so that the bolt with relatively weaker fastening force is easy to loosen and fall off in an application scene (such as an electric automobile) with vibration, and the working stability of the whole fuel cell stack is influenced.

The present invention is a strapping device for a fuel cell stack proposed based on the above objective background research, and the implementation schemes of the present invention will be developed one by one through various embodiments, and in different embodiments, different implementation schemes proposed based on the common inventive concept of the present invention will be described with emphasis on the consideration of different application scenarios of the inventor.