阅读说明：本技术 一种半预制半现浇型构造柱及其组装结构和施工方法 (Semi-prefabricated and semi-cast-in-place constructional column and assembling structure and construction method thereof ) 是由 王伟 俞钟鸣 黄巍 李亚民 杨毅峰 周向荣 付锋依 唐靖 于 2021-10-19 设计创作，主要内容包括：本发明涉及建筑工程,特别是一种半预制半现浇型构造柱及其组装结构和施工方法。所述半预制半现浇型构造柱包括内部具有钢筋系统的柱体,所述柱体包括从下至上顺序布置的现浇段和预制段,所述预制段的上部一侧表面上竖直设置用于与上结构梁预埋的定位钢筋连接的预留凹槽,所述预制段的下部预埋用于将所述预制段支承在下结构梁上的支承钢筋,且所述支承钢筋贯穿所述现浇段,并从所述现浇段的底面伸出所述现浇段一长度。本发明构造柱的结构及组装方便工人进行混凝土浇筑、振捣,能保证构造柱的浇筑质量,且易与原结构梁连接。(The invention relates to constructional engineering, in particular to a semi-prefabricated semi-cast-in-place constructional column and an assembly structure and a construction method thereof. The semi-prefabricated semi-cast-in-place constructional column comprises a column body which is internally provided with a steel bar system, the column body comprises a cast-in-place section and a prefabricated section which are sequentially arranged from bottom to top, a reserved groove which is used for being connected with a positioning steel bar embedded in an upper structural beam is vertically arranged on the surface of one side of the upper portion of the prefabricated section, supporting steel bars which are used for supporting the prefabricated section on a lower structural beam are embedded in the lower portion of the prefabricated section, the supporting steel bars penetrate through the cast-in-place section and stretch out of the bottom surface of the cast-in-place section by a length of the cast-in-place section. The structure and assembly of the constructional column are convenient for workers to carry out concrete pouring and vibrating, the pouring quality of the constructional column can be ensured, and the constructional column is easy to connect with an original structural beam.)

1. The utility model provides a half prefabricated half cast-in-place type constructional column, includes that the inside has the cylinder of steel bar system, its characterized in that, the cylinder includes from the cast-in-place section (A) and the prefabricated section (B) of following supreme order arrangement, vertically set up on the upper portion side surface of prefabricated section and be used for reservation recess (8) of being connected with the pre-buried positioning bar in the upper structure roof beam, the pre-buried supporting bar (3) that is used for with prefabricated section support on the lower structure roof beam in the lower part of prefabricated section, and the supporting bar runs through the cast-in-place section, and stretches out a length of cast-in-place section from the bottom surface of cast-in-place section.

2. The semi-prefabricated semi-cast-in-place constructional column as claimed in claim 1, wherein the steel bar system comprises a plurality of vertical steel bars (1) penetrating through the whole constructional column system and transverse stirrups (2) connecting the vertical steel bars, the transverse stirrups at the reserved grooves are U-shaped stirrups, and the opening directions of the U-shaped stirrups are consistent with the opening directions of the reserved grooves.

3. Semi-prefabricated semi-cast-in-place constructional column as in claim 1, characterized in that masonry wall tie bars (4) and racking joints (9) are reserved on the prefabricated sections.

4. The semi-prefabricated semi-cast-in-place constructional column as claimed in claim 1, wherein the lower part of the supporting steel bar is provided with an external thread, and a connecting sleeve is screwed on the external thread.

5. A semi-prefabricated semi-cast-in-place type constructional column assembly structure comprises an upper structural beam, a constructional column and a lower structural beam, and is characterized in that vertical downward positioning steel bars (5) are embedded in the upper structural beam, the constructional column is the semi-prefabricated semi-cast-in-place type constructional column as claimed in any one of claims 1 to 4, constructional column planting bars (6) corresponding to vertical steel bars of the constructional column in a one-to-one mode are implanted in the lower structural beam, the positioning steel bars are placed in reserved grooves of a column body, the vertical steel bars (1) of the column body are connected with the constructional column planting bars, the reserved grooves are grouted, and concrete is poured in cast-in-place sections.

6. A semi-prefabricated and semi-cast-in-place constructional column assembly as claimed in claim 5 wherein the support rebar is threadedly connected to the connecting sleeve.

7. The semi-prefabricated semi-cast-in-place constructional column assembly structure of claim 5, wherein the depth of the reserved groove is not less than the protruding length of the positioning steel bar.

8. An assembling construction method of the semi-prefabricated semi-cast-in-place constructional column as claimed in any one of claims 1 to 4, characterized by comprising the following steps:

s1: in the upper structural beam pouring process, positioning steel bars (5) are embedded according to the requirements of construction drawings;

s2: after the lower structural beam is formed, embedding constructional column embedded steel bars (6) at the corresponding positions of the constructional column vertical steel bars (1) on the lower structural beam according to the requirements of construction drawings;

s3: installing a prefabricated section template of the constructional column according to a construction drawing, integrally placing a steel bar system of the constructional column into the installed prefabricated section template, pre-embedding masonry wall tie bars (4) and supporting steel bars (3) according to the drawing requirement, and then completing the prefabricated molding of a prefabricated section (B);

s4: after the prefabricated section is demolded, the constructional column is integrally moved to an installation position, a connecting sleeve (7) is installed at the bottom of a supporting steel bar (3) and then erected, the constructional column is supported on a lower structural beam through the supporting steel bar and the connecting sleeve (7), meanwhile, a positioning steel bar (5) of an upper structural beam is clamped into a reserved groove (8) of the prefabricated section (B), and the top end of the prefabricated section is fully contacted with the bottom surface of the upper structural beam through the height adjustment of the constructional column through the threaded connection of the connecting sleeve and the supporting steel bar;

s5: then, filling and compacting the reserved groove (8) of the constructional column in a grouting mode;

s6: after the grouting material in the reserved groove is fully solidified, connecting a vertical steel bar (1) of a constructional column steel bar system and a constructional column steel bar planting (6) on a lower structural beam into a whole;

s7: after the prefabricated section of the constructional column is fixed, a cast-in-place section template of the constructional column is installed, a pouring opening is formed in the top of the cast-in-place section template, concrete is poured into the cast-in-place section template through the pouring opening during pouring, and the concrete is guaranteed to flow into the bottom of the constructional column through sufficient vibration.

9. The assembling construction method of the semi-prefabricated semi-cast-in-place constructional column as claimed in claim 8, wherein the construction of the plain concrete reverse ridge is performed before the installation of the cast-in-place section formwork, and when the construction of the plain concrete reverse ridge is performed, the elevation is determined by one meter line of the floor building, so as to ensure that the upper openings of the plain concrete reverse ridge formwork are on the same horizontal plane, and the surface of the cast-in-place section formwork, which is in contact with the masonry wall, needs to be pasted with the grout stop bars.

10. The assembling construction method of a semi-prefabricated semi-cast-in-place constructional column as claimed in claim 8, wherein during masonry wall construction, the branches are firstly retreated and then the top is provided with an inclined building opening, and the inclined building is performed to the top after the masonry wall is settled.

Technical Field

The invention relates to a construction project, in particular to a semi-prefabricated semi-cast-in-place constructional column and an assembly structure and a construction method thereof.

Background

According to the requirements related to masonry structure design specifications (GB50003-2011), constructional columns are arranged at the joints of longitudinal walls and transverse walls, the end parts of the walls and the hole edges of large holes in the reinforced brick masonry members. In the actual construction of scene, because the constructional column height (equal to the layer net height) is higher than constructor, operation platform need be set up in many places operation, and constructional column cross sectional area is little, and the shaking stick can't be visited down to the constructional column bottom when the intensive formation of template reinforcement difficulty, reinforcing bar distribution causes pours, further leads to the unable effective vibration in constructional column lower part, has serious quality and potential safety hazard, for example: in the process of connecting and constructing the embedded bars of the constructional column and the upper and lower structural beams, the embedded bars are often required to be adjusted to be dislocated with the vertical steel bars of the constructional column due to the blocking of the steel bars of the original structural beam, so that the binding of the vertical steel bars of the constructional column is influenced, and the quality of the binding and connecting of the vertical steel bars of the constructional column and the embedded bars is poor; when the template of the constructional column is reinforced, the template is difficult to reinforce due to the small cross-sectional area of the constructional column, a formwork supporting and reinforcing system cannot completely bear the self weight of concrete, the lower part of the constructional column is easy to expand, adverse effects are caused to later construction, and the surface impression is poor; when the constructional column is poured, the pouring opening is far higher than the height which can be reached by a human body, and pouring can be completed only by virtue of an operation platform when pouring is carried out; after the constructional column is poured, the problems of concrete honeycomb pitted surface and the like of the constructional column are easily caused due to insufficient vibration, and the quality and the attractiveness of the constructional column are influenced.

Chinese patent CN107288263A discloses a construction method of a semi-prefabricated semi-cast-in-place constructional column, but its prefabricated part is the periphery and bottom of the constructional column, and its pouring opening is also at the top of the constructional column, so although the usage amount of the formwork is reduced, the lower part expansion is also lightened to a certain extent, it is still inconvenient to connect with the structural beam, the steel bar planting dislocation is easy to occur, the pouring is inconvenient, the concrete is difficult to vibrate, the concrete pouring quality can not be guaranteed, and the impression quality is poor.

Disclosure of Invention

The invention aims to solve the technical problem that the existing semi-prefabricated semi-cast-in-place constructional column has the defects, and provides the semi-prefabricated semi-cast-in-place constructional column which is convenient for concrete pouring and vibration and is easy to connect with a structural beam, an assembly structure and a construction method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a half cast-in-place type constructional column of semi-prefabricating, has steel bar system's cylinder including inside, the cylinder includes from the cast-in-place section and the prefabricated section of supreme arranging in proper order down, the vertical reservation recess that is used for being connected with the pre-buried spacer bar of upper structure roof beam that sets up on the upper portion side surface of prefabricated section, the pre-buried supporting reinforcement who is used for with prefabricated section support on lower structure roof beam in the lower part of prefabricated section, just the supporting reinforcement runs through cast-in-place section, and stretches out from the bottom surface of cast-in-place section a length of cast-in-place section.

According to the invention, the constructional column is divided into the upper section and the lower section, the upper section is prefabricated and formed into the prefabricated section, and the lower section is cast in situ to the construction site to form the cast-in-place section, so that the casting opening of the constructional column is moved downwards, the casting and vibration of concrete are facilitated, and the cast-in-place quantity is reduced, so that a formwork expansion of a cast-in-place section is not easy to occur, and the quality of the constructional column is ensured more easily. In addition, the upper part of the prefabricated section is provided with a reserved groove used for being connected with the positioning steel bars pre-embedded on the upper structural beam, and the lower part of the prefabricated section is pre-embedded with the supporting steel bars used for supporting the prefabricated section on the lower structural beam, so that the prefabricated section is convenient to be connected with the upper structural beam and the lower structural beam.

It needs further to explain that, supporting reinforcement only does the prefabricated section of support usefulness in this application, and the constructional column is whole to be connected into an organic whole through vertical reinforcing bar and constructional column embedded steel bar among its steel bar system and the positioning reinforcement of reserving in the upper structure roof beam, upper and lower structure.

The reinforcing bar system comprises a plurality of vertical reinforcing bars and transverse stirrups connected with the vertical reinforcing bars, the transverse stirrups in the reserved grooves adopt U-shaped stirrups, embedded reinforcing bars are conveniently placed on the upper structural beams, and the opening directions of the U-shaped stirrups are consistent with the opening directions of the reserved grooves.

For the convenience with being connected of brickwork wall, brickwork wall drawknot muscle and serrated racking are reserved on the prefabricated section.

Preferably, the lower part of the supporting steel bar is provided with an external thread, and the external thread is in threaded connection with a connecting sleeve, so that the installation height of the constructional column can be conveniently adjusted by adjusting the combination length of the supporting steel bar and the connecting sleeve, and the top of the prefabricated section is in close contact with the upper structural beam.

Based on the same invention concept, the invention also provides a semi-prefabricated semi-cast-in-place constructional column assembly structure which comprises an upper structural beam, a constructional column and a lower structural beam, wherein vertically downward positioning steel bars are pre-embedded on the upper structural beam, the constructional column is the semi-prefabricated semi-cast-in-place constructional column, constructional column planting bars are implanted on the lower structural beam, the positioning steel bars are placed in the reserved grooves of the column body, the bottom of the supporting steel bars is supported on the lower structural beam, the vertical steel bars of the column body are connected with the constructional column planting bars, the reserved grooves are grouted, and concrete is poured in the cast-in-place section.

In order to facilitate the close fitting of the top of the prefabricated section of the constructional column and the upper structural beam, the lower part of the supporting steel bar is provided with an external thread, and the external thread is connected with a connecting sleeve in a threaded manner.

In order to ensure that the positioning steel bars of the upper structural beam are smoothly placed into the reserved grooves, the depth of each reserved groove is not less than the extending length of each positioning steel bar.

Based on the same invention concept, the invention also provides an assembly construction method of the semi-prefabricated semi-cast-in-place constructional column, which comprises the following steps:

s1: in the upper structural beam pouring process, positioning steel bars are embedded according to the requirements of construction drawings;

s2: after the lower structural beam is formed, installing the structural column embedded steel bars according to the requirements of construction drawings;

s3: installing a prefabricated section template of the constructional column according to a construction drawing, integrally placing a steel bar system of the constructional column into the installed prefabricated section template, pre-embedding masonry wall tie bars and supporting steel bars according to the drawing requirement, and then completing the prefabricated molding of the prefabricated section;

s4: after the prefabricated section is demolded, integrally moving the constructional column to an installation position, erecting the constructional column after installing a connecting sleeve at the bottom of a supporting steel bar, supporting the constructional column on a lower structural beam through the supporting steel bar and the connecting sleeve, clamping a positioning steel bar of an upper structural beam into a reserved groove of the prefabricated section, and adjusting the height of the constructional column through the threaded connection of the connecting sleeve and the supporting steel bar to ensure that the top end of the prefabricated section is in full contact with the bottom surface of the upper structural beam;

s5: then, filling and compacting the reserved groove of the constructional column in a grouting manner;

s6: after the grouting material in the reserved groove is fully solidified, connecting the vertical steel bars of the constructional column steel bar system and the constructional column steel bars on the lower structural beam into a whole;

s7: after the prefabricated section of the constructional column is fixed, a cast-in-place section template of the constructional column is installed, a pouring opening is formed in the top of the cast-in-place section template, concrete is poured into the cast-in-place section template through the pouring opening during pouring, and the concrete is guaranteed to flow into the bottom of the constructional column through sufficient vibration.

Preferably, before the cast-in-place section formwork is installed, the elevation of the plain concrete reverse ridge is determined through one meter line of the floor building, the plain concrete reverse ridge is poured, meanwhile, the upper opening of the cast-in-place section formwork is ensured to be on the same horizontal plane, and a grout stop strip is adhered to the surface, in contact with the masonry wall, of the cast-in-place section formwork.

Preferably, when the brickwork wall was built by laying bricks or stones, the serrated raft retreated earlier the back, and the top is stayed and is established the mouth of building to one side, treats that the brickwork wall subsides to accomplish the back and builds to one side to step the top really.

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

1. when the constructional column is installed, the constructional column embedded steel bars are only implanted on the lower structural beam, the vertical steel bars of the constructional column are connected with the constructional column embedded steel bars, and the upper embedded steel bars of the traditional constructional column are replaced by reserved positioning steel bars with the same cross section as the original designed embedded steel bars, so that the quality problems of poor binding quality of the vertical steel bars of the constructional column, large deviation of the thickness of a steel bar protective layer and the like caused by the position deviation of the upper embedded steel bars and the lower embedded steel bars are avoided;

2. the maximum ground clearance of the cast-in-place section is not greater than the maximum height which can be constructed by a constructor standing on the ground, the length of the prefabricated section is the floor clear height minus the height of the cast-in-place section, the cast-in-place and the concrete are convenient to cast in place and fully vibrate, the quality problem of a constructional column caused by insufficient vibration is avoided, an operation platform does not need to be erected for construction in construction, and potential safety hazards are reduced;

3. the height of the cast-in-place section is reduced, so that the aim of reducing the self weight of concrete is fulfilled, and the aim of reducing the hidden danger of expansion is fulfilled;

4. the height of the prefabricated section can be adjusted through the threaded connection length of the supporting steel bar and the connecting sleeve in threaded connection with the supporting steel bar, so that the prefabricated section is effectively guaranteed to be in full contact with the bottom surface of the upper structural beam;

5. the grouting material filled in the reserved groove has the characteristics of high hardness, early strength and high strength, so that the aims of quickly fixing the prefabricated section of the constructional column and preventing the prefabricated section from collapsing are fulfilled.

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

Fig. 1 is a front view of an assembly structure of a semi-prefabricated and semi-cast-in-place type construction column according to the present invention.

Fig. 2 is a left side view of the semi-prefabricated and semi-cast-in-place type construction post assembly structure according to the present invention.

Fig. 3 is a plan view of a semi-prefabricated and semi-cast-in-place type construction column assembly structure according to the present invention.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

As shown in fig. 1 to 3, an embodiment of the semi-prefabricated and semi-cast-in-place type construction column assembly structure according to the present invention includes an upper structural beam C connecting the top of the construction column, a construction column, and a lower structural beam D connecting the bottom of the construction column. And a positioning steel bar 5 which plays a role of fixing the constructional column vertically downwards is embedded in the upper structural beam C. The inside steel bar system that comprises many vertical steel bars 1 and connection the horizontal stirrup 2 of vertical steel bar 1 jointly that has of cylinder of constructional column, and the cylinder includes from the cast-in-place section A and the prefabricated section B of following supreme order and arranging. The maximum ground clearance of the cast-in-place section A is not more than the maximum height which can be constructed by construction personnel standing on the ground, and the length of the prefabricated section B is the height obtained by subtracting the height of the cast-in-place section A from the net height of a floor. The prefabricated section B is characterized in that a reserved groove 8 used for being connected with a positioning steel bar 5 pre-buried on an upper structural beam C is vertically arranged on the surface of one side of the upper portion of the prefabricated section B, supporting steel bars 3 used for supporting the prefabricated section B are pre-buried in the lower portion of the prefabricated section B, the supporting steel bars 3 penetrate through the cast-in-place section A, and a length of the cast-in-place section A extends out of the bottom surface of the cast-in-place section A. And the lower structural beam D is implanted with structural column embedded bars 6 according to the requirements of the drawing.

When the constructional column is installed, the positioning steel bars 5 on the upper structural beam C are placed in the reserved grooves 8 of the constructional column, and the positioning steel bars 5 and the prefabricated sections B are connected into a whole through grouting in the reserved grooves 8. The vertical steel bar 1 of the constructional column is fixedly connected with the steel bar planting 6 of the constructional column. And concrete is poured in the cast-in-place section A.

In order to guarantee that the positioning steel bars 5 on the upper structural beam C are smoothly placed into the reserved groove 8 of the constructional column, the transverse stirrups 2 at the reserved grooves 8 adopt U-shaped stirrups, the opening directions of the U-shaped stirrups are consistent with the opening directions of the reserved grooves 8, and the depth of the reserved grooves 8 is not less than the length of the positioning steel bars 5 extending out of the upper structural beam C.

For the convenience with being connected of brickwork wall, reserve brickwork wall drawknot muscle 4 and horse tooth racking 9 on the prefabricated section B. Simultaneously, the stability of brickwork wall has been strengthened to tooth racking 9 and brickwork wall drawknot muscle 4.

For convenient and lower structure beam D's being connected, adopt the ligature overlap joint between vertical reinforcing bar 1 and the constructional column bar planting 6, overlap joint length should set up according to relevant standard requirement.

For the installation of convenient prefabricated section B fixed, the lower part of supporting reinforcement 3 sets up the external screw thread, and the external screw thread of supporting reinforcement 3 matches with the internal thread of connecting sleeve 7. When the constructional column is installed, before the cast-in-place section A is constructed, the prefabricated section B can be supported through the supporting steel bars 3, and meanwhile, the top surface of the prefabricated section B can be fully contacted with the bottom surface of the upper structural beam C by adjusting the threaded connection between the supporting steel bars 3 and the connecting sleeve 7. In this embodiment, C25 thread steel is preferably used as the support reinforcement 3.

Cast-in-place section A adopts to draw the screw rod to drawing and the reinforced and fixed template of mode of steel pipe after masonry wall builds by laying bricks or stones the completion, and the thick liquid strip is only needed to paste in the face of template and masonry wall contact, prevents to leak thick liquid. Establish the mouth of pouring at the top, pour the concrete through pouring the mouth when pouring in the template, guarantee through abundant vibration that the concrete flows into constructional column bottom, guarantee to pour the quality after the shaping and meet the requirements.

The assembly construction method of the semi-prefabricated semi-cast-in-place constructional column comprises the following steps:

s1: strictly positioning and embedding positioning steel bars 5 according to the requirements of construction drawings in the process of pouring the upper structural beam C;

s2: after the lower structural beam D is formed, positioning and installing the constructional column embedded steel bars 6 according to the requirements of construction drawings;

s3: installing a prefabricated section template of the constructional column according to a construction drawing, integrally placing a steel bar system of the constructional column into the installed prefabricated section template, pre-embedding masonry wall tie bars 4 and supporting steel bars 3 according to the drawing requirement, and then completing the prefabricated molding of a prefabricated section B;

s4: after the prefabricated section B is demoulded, the constructional column is integrally moved to the installation position, two persons are responsible for installing the prefabricated section B, the positioning steel bars 5 of the upper structural beam C are placed into the reserved grooves 8 of the prefabricated section B, and the height of the constructional column is adjusted through the threaded connection of the connecting sleeve 7 and the supporting steel bars 3, so that the top end of the prefabricated section B is fully contacted with the bottom surface of the upper structural beam C, and the fixing effect is achieved;

s5: then, filling and compacting the reserved groove 8 of the constructional column in a grouting mode;

s6: after the grouting material in the reserved groove 8 is fully solidified, connecting the vertical steel bars 1 of the constructional column steel bar system and the constructional column planting bars 6 on the lower structural beam D into a whole, wherein the prefabricated section B and the upper structural beam C can be regarded as a whole by replacing the positioning steel bars 5 of the constructional column vertical steel bars 1 through a single equal section, and the prefabricated section B and the lower structural beam D can be regarded as a whole by one-to-one binding and overlapping of the constructional column vertical steel bars 1 and the constructional column planting bars 6, so that the collapse of the prefabricated section B is effectively prevented;

s7: after the prefabricated section B of the constructional column is fixed (after grouting is finished and the strength of grouting material reaches), installing a cast-in-place section template of the constructional column, arranging a pouring opening at the top of the cast-in-place section template, pouring concrete into the cast-in-place section template through the pouring opening during pouring, ensuring that the concrete flows into the bottom of the constructional column through sufficient vibration, and ensuring that the quality after pouring meets the requirements.

If the construction of the plain concrete reversed bank E needs to be carried out, the construction of the plain concrete reversed bank E needs to be carried out after the prefabricated section B is installed. And building the masonry wall after the plain concrete reverse ridge E is finished, and constructing the cast-in-place section A after the building is finished. When the plain concrete reverse ridge E is constructed, the elevation of the plain concrete reverse ridge is determined by building a one-meter line on a floor, the upper openings of the concrete reverse ridge templates are ensured to be on the same horizontal plane, the templates are firmly reinforced, and the displacement is avoided in the pouring process.

During pouring, the concrete is transported manually, poured into the formwork and vibrated sufficiently, and the surface is horizontal, does not sink obviously, does not generate bubbles and is suitable for surface slurry.

Brickwork wall is built by laying bricks and is guaranteed that perpendicular mortar joint thickness is unified, and the raft retreats earlier afterwards, and the top is stayed and is established oblique joint, treats that the brickwork wall subsides to build to one side after accomplishing and pushes up really.

The template of cast-in-place section A adopts the mode that the counter-pulling screw rod is fixed with the steel pipe is consolidated, and the face that template and brickwork wall contact need paste and only starch the strip, prevents to leak thick liquid.

The above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art can make many possible variations and modifications to the technical solution of the present invention or modify equivalent embodiments using the technical content disclosed above without departing from the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.