阅读说明：本技术 一种盾构平移过站装置 (Shield translation station-crossing device ) 是由 张轩 陈申强 白杰 龚晓林 申德芳 晏立忠 谢飞 邢杰博 周全洪 余乐 于 2020-04-02 设计创作，主要内容包括：本发明公开了一种盾构平移过站装置,属于盾构施工技术领域。本发明解决了现有技术中平移过站装置对盾构机进行横向平移的困难大,且操作不方便、施工效率低的问题。本发明的技术方案是：包括托架、数个第一牛腿和数个第二牛腿,所述第一牛腿和第二牛腿均设置在盾构机下部的两侧,所述第一牛腿下端设置有升降液压缸,所述托架上设置有纵移液压缸,所述纵移液压缸的轴线方向与托架的长度方向平行,所述纵移液压缸的移动端与第二牛腿连接,所述托架的侧面设置有托架横移液压缸。本发明可以很方便的进行盾构机的横向移动,且操作过程简单,能够提高施工效率,节约施工成本,适用于盾构过站施工。(The invention discloses a shield translation station-crossing device, and belongs to the technical field of shield construction. The invention solves the problems of great difficulty, inconvenient operation and low construction efficiency of the translation station-crossing device for transversely translating the shield tunneling machine in the prior art. The technical scheme of the invention is as follows: including the first bracket of bracket, several and several second bracket, first bracket and second bracket all set up the both sides in the shield constructs the machine lower part, first bracket lower extreme is provided with hydraulic cylinder, it indulges the pneumatic cylinder to be provided with on the bracket, it is parallel with the length direction of bracket to indulge the axis direction who moves the pneumatic cylinder, it is connected with the second bracket to indulge the removal end that moves the pneumatic cylinder, the side of bracket is provided with bracket sideslip pneumatic cylinder. The invention can conveniently carry out the transverse movement of the shield tunneling machine, has simple operation process, can improve the construction efficiency and save the construction cost, and is suitable for the shield station-crossing construction.)

1. The utility model provides a shield constructs translation device of passing a stop which characterized in that: including bracket (20), the first bracket of several (3) and several second bracket (4), first bracket (3) and second bracket (4) all set up the both sides in shield structure machine (1) lower part, first bracket (3) lower extreme is provided with hydraulic cylinder (5), be provided with on bracket (20) and indulge and move pneumatic cylinder (16), the axis direction who indulges and move pneumatic cylinder (16) is parallel with the length direction of bracket (20), the removal end that indulges and move pneumatic cylinder (16) is connected with second bracket (4), the side of bracket (20) is provided with bracket sideslip pneumatic cylinder (14).

2. The shield translation station-crossing device according to claim 1, wherein the bracket (20) comprises a plurality of horizontal bottom braces (2) which are transversely arranged, inclined braces (17) and longitudinal braces (19) are arranged between the adjacent horizontal bottom braces (2), the longitudinal braces (19) are perpendicular to the horizontal bottom braces (2), two ends of each inclined brace (17) are respectively and fixedly connected with the horizontal bottom braces (2), and an included angle between each inclined brace (17) and each horizontal bottom brace (2) is an acute angle.

3. The shield translation station-crossing device according to claim 2, wherein two ends of the horizontal bottom support (2) are respectively provided with a track support (6), a steel rail (8) for supporting the shield tunneling machine (1) is arranged on the track support (6), and the steel rail (8) is perpendicular to the horizontal bottom support (2).

4. A shield translation station-crossing device according to claim 3, characterized in that the cross-sectional shape of the track supports (6) is i-shaped, and the intersection line of the planes of the webs of the two track supports (6) coincides with the center line of the shield machine (1).

5. A shield translation station-crossing device according to claim 3, characterized in that the rail bracket (6) is connected with a first rail bracket reinforcing plate (9), the first rail bracket reinforcing plate (9) is triangular, and two sides of the first rail bracket reinforcing plate (9) are respectively fixedly connected with the rail bracket (6) and the horizontal bottom brace (2).

6. A shield translation station-crossing device according to claim 3, characterized in that two sides of the steel rail (8) are provided with steel rail pressing plates (10), the steel rail (8) is perpendicular to the plane of the steel rail pressing plates (10), and the steel rail pressing plates (10) are respectively fixedly connected with the steel rail (8) and the rail bracket (6).

7. A shield translation station-crossing device according to claim 1, characterized in that the bracket (20) further comprises a mounting bracket (7), the mounting bracket (7) is arranged along the length direction of the bracket (20), a supporting plate (15) is arranged on the mounting bracket (7), and the supporting plate (15) is connected with the fixed end of the longitudinal hydraulic cylinder (16).

8. A shield translation station-crossing device according to claim 7, characterized in that a plurality of mounting holes are uniformly arranged on the mounting frame (7), and the supporting plate (15) is connected with the mounting frame (7) through the mounting holes by bolts.

9. A shield translation station-crossing device according to claim 7, characterized in that a first mounting frame reinforcing plate (12) is fixedly connected to the side surface of the mounting frame (7), and the plane of the first mounting frame reinforcing plate (12) is perpendicular to the mounting frame (7).

10. A shield translation station-crossing device according to claim 1, characterized in that the bracket (20) is connected with a steel wire rope, and the steel wire rope is connected with a winch.

Technical Field

The invention belongs to the technical field of shield construction, and particularly relates to a shield translation station-crossing device.

Background

With the development of cities, urban underground rail transit is more and more mature, and shield construction is the tunnel construction method with the highest safety in tunnel construction at present. In subway construction, a plurality of stations are provided, the section is short, the shield machine needs to pass through one or more stations under most conditions, and the shield machine is large in size, so that the shield machine passing through the stations is a difficult problem in shield construction.

At present, the traditional shield station-crossing mode mainly comprises the steps of dismantling, hoisting, translating and station-crossing. The links of frequent hoisting, disassembly, secondary assembly, secondary debugging and construction and the like of the shield machine and a later matching are needed for disassembling and hoisting, the construction period is seriously influenced, meanwhile, a large amount of investment of manpower, material resources and financial resources is needed, and the construction cost is increased. The existing shield translation station-crossing method is to lay a track on a station bottom plate, install a shield machine on a special rail trolley and pull the shield machine to cross the station by using a winch. However, in general, the tunnel axes at the two ends of the station do not coincide, and when the shield machine moves longitudinally, the shield machine is stressed unevenly, and the moving direction of the shield machine can shift, so that the shield machine needs to be translated transversely, and the axis of the shield machine coincides with the axis at the other end of the station. Because the self weight of the shield machine is large, the existing translation station-crossing device has great difficulty in transversely translating the shield machine, and has inconvenient operation and low construction efficiency.

Therefore, in order to solve the above technical problems, it is necessary to provide a translation station-crossing device suitable for transversely moving a shield machine, so as to overcome the above-mentioned drawbacks in the prior art.

Disclosure of Invention

Aiming at the problems of great difficulty, inconvenient operation and low construction efficiency of the translation station-crossing device in the prior art in carrying out transverse translation on the shield machine, the invention provides a shield translation station-crossing device, which aims to solve the problems that: the difficulty of transverse translation of the shield tunneling machine is reduced, and the construction efficiency is improved.

The technical scheme adopted by the invention is as follows:

the utility model provides a shield constructs translation device of passing a station, includes the first bracket of bracket, several and several second bracket, first bracket and second bracket all set up the both sides in the shield constructs the machine lower part, first bracket lower extreme is provided with hydraulic cylinder, it moves the pneumatic cylinder to be provided with on the bracket indulge, the axis direction who moves the pneumatic cylinder is parallel with the length direction of bracket indulges, it is connected with the second bracket to indulge the removal end that moves the pneumatic cylinder, the side of bracket is provided with bracket sideslip pneumatic cylinder.

After the shield machine is in place on the bracket, the longitudinal moving hydraulic cylinder is matched with the second bracket and can push the shield machine to move longitudinally. When the shield machine needs to be transversely translated, the lifting hydraulic cylinder is started to lift the shield machine to a certain height, then the bracket transverse hydraulic cylinder is started, the bracket transverse hydraulic cylinder pushes the bracket to translate 100-200 mm rightwards (assuming that the bracket translates rightwards), then the lifting hydraulic cylinder on the left side is contracted to enable the left side of the shield machine to be in contact with the bracket, then the lifting hydraulic cylinder on the right side is contracted, the shield machine can roll rightwards around the bracket until the right side of the shield machine is in contact with the bracket, and a transverse moving stroke is completed. If the distance needing to move transversely is large, only a few strokes are needed. After the technical scheme is adopted, the transverse movement of the shield tunneling machine can be conveniently carried out, the operation process is simple, the construction efficiency can be improved, and the construction cost is saved.

Preferably, the bracket comprises a plurality of horizontal bottom supports which are transversely arranged, an inclined support and a longitudinal support are arranged between the adjacent horizontal bottom supports, the longitudinal support is perpendicular to the horizontal bottom supports, two ends of the inclined support are fixedly connected with the horizontal bottom supports respectively, and an included angle between the inclined support and the horizontal bottom supports is an acute angle.

After the preferred scheme is adopted, the rigidity and the stability of the bracket are stronger, and the bracket is not easy to deform or damage.

Preferably, two ends of the horizontal bottom support are respectively provided with a track support, a steel rail for supporting the shield tunneling machine is arranged on the track supports, and the steel rail is perpendicular to the horizontal bottom support.

After the optimal scheme is adopted, the shield tunneling machine transmits the pressure to the horizontal bottom support through the steel rail and the rail support in sequence, the stress of the horizontal bottom support is more uniform and dispersed, and the bracket is prevented from being locally damaged due to the uneven stress of the horizontal bottom support.

Preferably, the cross section of each track support is in an I shape, and the intersection line of the planes where the webs of the two track supports are located coincides with the central line of the shield tunneling machine.

After the preferred scheme is adopted, the web of the track support and the pressure transmitted by the shield tunneling machine are located on the same plane, the stress of the track support is more reasonable, and the bearing capacity of the track support can be improved.

Preferably, the track support is connected with a first track support reinforcing plate, the first track support reinforcing plate is triangular, and two sides of the first track support reinforcing plate are respectively fixedly connected with the track support and the horizontal bottom support.

After adopting this preferred scheme, first track support reinforcing plate can strengthen track support's side direction, increases track support's lateral rigidity, prevents that track support from taking place to warp and destroying.

Preferably, the two sides of the steel rail are provided with steel rail pressing plates, the steel rail is perpendicular to the plane where the steel rail pressing plates are located, and the steel rail pressing plates are fixedly connected with the steel rail and the rail support respectively.

After the preferable scheme is adopted, the steel rail pressing plate can improve the lateral rigidity of the steel rail and prevent the steel rail from generating lateral deformation after being pressed.

Preferably, the bracket further comprises a mounting frame, the mounting frame is arranged along the length direction of the bracket, a supporting plate is arranged on the mounting frame, and the supporting plate is connected with the fixed end of the longitudinal movement hydraulic cylinder.

After the preferable scheme is adopted, the supporting plates can provide the counter force required by the longitudinal movement hydraulic cylinder to push the shield tunneling machine to longitudinally move, and the longitudinal movement hydraulic cylinder is convenient to install.

Preferably, a plurality of mounting holes are uniformly formed in the mounting frame, and the supporting plate is connected with the mounting frame through the mounting holes in a bolt mode.

After adopting this preferred scheme, the position of fagging can be adjusted, is convenient for adjust the position of indulging the pneumatic cylinder as required, when the elongation of indulging the pneumatic cylinder is not enough, can tear down indulging pneumatic cylinder and fagging and install the suitable position of mounting bracket again, can compensate the not enough problem of elongation of indulging the pneumatic cylinder.

Preferably, the side surface of the mounting frame is fixedly connected with a first mounting frame reinforcing plate, and the plane where the first mounting frame reinforcing plate is located is perpendicular to the mounting frame.

After adopting this preferred scheme, the lateral rigidity and the stability of mounting bracket can be improved to first mounting bracket reinforcing plate, prevents that the mounting bracket from taking place lateral deformation and leading to the emergence of incident.

Preferably, the bracket is connected with a steel wire rope, and the steel wire rope is connected with a winch.

After the optimal scheme is adopted, when the shield machine longitudinally moves to the end part of the bracket, the lifting device is started to lift the shield machine, then the bracket is pulled by the winch to continuously move forwards, then the lifting device is contracted to place the shield machine on the bracket, and the shield machine can continuously move forwards under the pushing of the longitudinal movement hydraulic cylinder.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the invention can conveniently carry out the transverse movement of the shield tunneling machine, has simple operation process, can improve the construction efficiency and saves the construction cost.

2. The bracket comprises a horizontal bottom support, an inclined support and a longitudinal support, and an included angle between the inclined support and the horizontal bottom support is an acute angle, so that the rigidity and stability of the bracket are stronger, and the bracket is not easy to deform or damage.

3. The rail is perpendicular with horizontal bottom sprag, and the shield constructs the machine and loops through rail, track support with pressure and transmit for horizontal bottom sprag, and the atress of horizontal bottom sprag is more even and dispersion, prevents that the inhomogeneous atress of horizontal bottom sprag from causing the bracket local damage.

4. The intersection line of the planes of the webs of the two track supports coincides with the central line of the shield tunneling machine, the webs of the track supports and the pressure transmitted by the shield tunneling machine are located on the same plane, the stress of the track supports is more reasonable, and the bearing capacity of the track supports can be improved.

5. First track support reinforcing plate can strengthen track support's side direction, increases track support's lateral rigidity, prevents that track support from taking place to warp and destroying.

6. The steel rail pressing plate can improve the lateral rigidity of the steel rail and prevent the steel rail from lateral deformation after being pressed.

7. The supporting plate can provide the counterforce required by the longitudinal movement of the shield tunneling machine pushed by the longitudinal movement hydraulic cylinder, and the longitudinal movement hydraulic cylinder is convenient to install.

8. The position of fagging can be adjusted, is convenient for adjust the position of indulging the pneumatic cylinder as required, when the elongation of indulging the pneumatic cylinder is not enough, can tear down indulging pneumatic cylinder and fagging and install the suitable position of mounting bracket again, can compensate the not enough problem of elongation of indulging the pneumatic cylinder.

9. The first mounting frame reinforcing plate can improve the lateral rigidity and stability of the mounting frame, and prevents the mounting frame from generating lateral deformation and causing safety accidents.

10. The bracket is connected with a winch, when the shield tunneling machine longitudinally moves to the end part of the bracket, the lifting device is started to lift the shield tunneling machine, then the bracket is pulled by the winch to continuously move forwards, then the lifting device is contracted to enable the shield tunneling machine to be placed on the bracket, and the shield tunneling machine can continuously move forwards under the pushing of the longitudinal movement hydraulic cylinder.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the present invention;

FIG. 3 is a perspective view of the bracket;

FIG. 4 is a schematic view of a carriage lateral movement structure;

FIG. 5 is a schematic view of a shield tunneling machine longitudinal movement cycle construction;

FIG. 6 is a schematic illustration of the shield machine in place on the carriage;

FIG. 7 is a schematic illustration of the shield machine hoist cylinder extended;

FIG. 8 is a schematic view of the carriage after lateral movement;

figure 9 is a schematic view of the hydraulic lift cylinder after retraction of one of its sides.

The device comprises a shield machine 1, a horizontal bottom support 2, a first bracket 3, a second bracket 4, a lifting hydraulic cylinder 5, a track support 6, a mounting frame 7, a steel rail 8, a first track support reinforcing plate 9, a steel rail pressing plate 10, a second track support reinforcing plate 11, a first mounting frame reinforcing plate 12, a second mounting frame reinforcing plate 13, a bracket transverse hydraulic cylinder 14, a support plate 15, a longitudinal hydraulic cylinder 16, a diagonal support 17, a connecting plate 18, a longitudinal support 19 and a bracket 20.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present invention will be described in detail with reference to fig. 1 to 9.

The utility model provides a shield constructs translation device of passing a station, includes bracket 20, the first bracket 3 of several and several second bracket 4, first bracket 3 and second bracket 4 all set up the both sides in 1 lower part of shield structure machine. In this embodiment, the number of the first corbels 3 is four, two sides of the shield tunneling machine 1 are respectively provided, the number of the second corbels 4 is two, and two sides of the shield tunneling machine 1 are respectively provided with one. And the lower end of the first bracket 3 is provided with a lifting hydraulic cylinder 5 for lifting the shield tunneling machine 1. The bracket 20 is provided with a longitudinal movement hydraulic cylinder 16, the axial direction of the longitudinal movement hydraulic cylinder 16 is parallel to the length direction of the bracket 20, and the moving end of the longitudinal movement hydraulic cylinder 16 is connected with the second bracket 4. The carriage-traversing hydraulic cylinder 14 (see fig. 4) is disposed transversely, a fixed end of the carriage-traversing hydraulic cylinder 14 is connected to a tunnel side wall or other fixed object, and a movable end of the carriage-traversing hydraulic cylinder 14 is connected to a side surface of the carriage 20.

The bracket 20 comprises a plurality of horizontal bottom supports 2 which are transversely arranged, two inclined supports 17 and four longitudinal supports 19 are arranged between the adjacent horizontal bottom supports 2, wherein the two longitudinal supports 19 are connected with the middle parts of the horizontal bottom supports, and the two longitudinal supports 19 are connected with the end parts of the horizontal bottom supports 2. The longitudinal support 19 is perpendicular to the horizontal bottom support 2, two ends of the inclined support 17 are fixedly connected with the horizontal bottom support 2, and an included angle between the inclined support 17 and the horizontal bottom support 2 is an acute angle. The longitudinal supports 19, the horizontal bottom braces 2 and the inclined braces 17 form a triangle to improve the stability of the bracket. In this embodiment, the horizontal bottom support 2 is made of H-shaped steel, and the middle of the horizontal bottom support 2 is disconnected and connected by a connecting plate 18 and a bolt. And the longitudinal support 19 and the inclined support 17 are made of channel steel.

The two ends of the horizontal bottom support 2 are respectively provided with a track support 6, a steel rail 8 used for supporting the shield tunneling machine 1 is arranged on the track support 6, and the steel rail 8 is perpendicular to the horizontal bottom support 2.

The cross section of the track support 6 is I-shaped, the lower flange plate of the track support 6 is parallel to the ground, the upper flange plate is perpendicular to the radial direction of the shield tunneling machine, and the plane where the webs of the two track supports 6 are located is provided with an intersection line which is superposed with the central line of the shield tunneling machine 1. The pressure applied to the track support 6 by the shield tunneling machine 1 can be located in the plane where the web plate is located, the web plate is free from forces in other directions, the track support is prevented from laterally overturning, and the bearing capacity of the track support 6 can be improved. In this embodiment, the rail bracket 6 is made of a steel plate with a thickness of 30 mm.

The track support 6 is connected with a first track support reinforcing plate 9 and a second track support reinforcing plate 11. The shape of first track support reinforcing plate 9 is triangle-shaped and two limits of first track support reinforcing plate 9 are respectively with track support 6 and horizontal bottom sprag 2 fixed connection. The width of the second rail bracket reinforcing plate 11 is the same as that of the upper flange plate of the rail bracket 6, and the plane of the second rail bracket reinforcing plate 11 is perpendicular to the rail bracket 6 and is welded with the rail bracket 6. The lateral direction of the rail bracket 6 is a weak part, and the first rail bracket reinforcing plate 9 and the second rail bracket reinforcing plate 11 can reinforce the lateral direction of the rail bracket 6, so that the rail bracket 6 is prevented from being damaged or deformed from the lateral direction.

The steel rail pressing plates 10 are arranged on two sides of the steel rail 8, the steel rail 8 is perpendicular to the plane where the steel rail pressing plates 10 are located, and the steel rail pressing plates 10 are fixedly connected with the steel rail 8 and the rail support 6 respectively. The rail pressing plate 10 is used for laterally supporting the rail 8, and lateral stability of the rail 8 is improved.

The bracket 20 further comprises a mounting rack 7, and the mounting rack 7 is arranged along the length direction of the bracket 20. The cross-sectional shape of mounting bracket 7 is the T font, including flange board and web, is provided with evenly distributed's mounting hole on the flange board, and fagging 15 is connected with the flange board through this mounting hole and bolt, fagging 15 is connected with the stiff end of indulging moving pneumatic cylinder 16. This arrangement facilitates adjustment of the position of the strut plate 15 and thus the position of the hydraulic ram 16. In this embodiment, the mounting frame 7 is made of a steel plate with a thickness of 30 mm.

The side welded connection of mounting bracket 7 has first mounting bracket reinforcing plate 12 and second mounting bracket reinforcing plate 13, first mounting bracket reinforcing plate 12 and second mounting bracket reinforcing plate 13 all are perpendicular with mounting bracket 7. The first and second mount reinforcing plates 12 and 13 serve to improve the lateral stability of the mount 7. In this embodiment, the first mounting bracket reinforcing plate 12 and the second mounting bracket reinforcing plate 13 are both made of 20mm thick steel plates.

A wire rope (not shown) is connected to the forward direction of the carriage 20, and a hoist (not shown) for dragging the carriage 20 is connected to the wire rope.

The working principle and the operation flow of the invention are as follows:

the shield machine moves longitudinally:

after the shield machine 1 is in place on the carriage 20, the longitudinal hydraulic cylinder 16 is controlled to extend, as shown in fig. 5, so that the shield machine 1 moves longitudinally on the carriage 20. When the shield machine 1 moves to the front end of the bracket 20, the lifting hydraulic cylinder 3 is controlled to extend to lift the shield machine 1, and then a winch (not shown in the figure) is started to drag the bracket 20 forwards. And after the bracket 20 is in place, controlling the lifting hydraulic cylinder 3 to shorten, so that the shield tunneling machine 1 is placed on the bracket 20 again. And repeating the steps until the shield tunneling machine moves to the initiating end.

Transversely moving the shield tunneling machine:

the method comprises the following steps: as shown in fig. 6, the shield machine 1 is in place, resting on the carriage 20.

Step two: as shown in fig. 7, the lifting hydraulic cylinder 5 is controlled to extend, so that the shield tunneling machine 1 is lifted by about 200 mm.

Step three: as shown in fig. 4 and 8, the carriage-lateral-moving hydraulic cylinder 14 is controlled to extend, and the carriage 20 is translated rightward (in the present embodiment, only the carriage is moved rightward) by 100 to 200 mm.

Step four: as shown in fig. 9, the hydraulic cylinder 5 on the left side of the shield tunneling machine 1 is controlled to be shortened so that the lower portion of the shield tunneling machine 1 comes into contact with the rail 8 on the left side.

Step five: and controlling the lifting hydraulic cylinder 5 on the right side of the shield machine 1 to shorten, so that the shield machine 1 rolls around the steel rail 8 on the left side until the shield machine 1 is contacted with the steel rail 8 on the right side, and placing the shield machine 1 on the bracket 20 again.

Step six: and (5) circulating construction until the shield tunneling machine 1 moves transversely to a specified position.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.