CN112832477B - An exterior wall concrete hanging board - Google Patents

Abstract

The invention provides an outer wall concrete hanging plate which is hung on an outer wall of a building and comprises a first keel fixed on the outer wall, a first connecting piece connected to the first keel and a concrete hanging plate fixed on the first connecting piece, wherein a plurality of U-shaped connecting pieces are anchored on the outer wall, a first clamping part is constructed on each U-shaped connecting piece, the first keel is a first frame formed by a plurality of keel pieces, at least part of the keel pieces are constructed with second clamping parts, and the second clamping parts are clamped with the first clamping parts to be suitable for fixing the first keel on the outer wall. The U-shaped connecting piece is formed by bending elastic materials. The invention has simple and convenient installation work, convenient installation and fixation, firm connection and difficult falling in extreme weather and earthquake disasters. The precast process at the concrete link plate does not need more arrangement of reinforcement or built-in fitting, has also saved the cost simultaneously.

Description

An exterior wall concrete hanging board

technical field

The invention relates to the technical field of construction engineering, in particular to an outer wall concrete hanging board.

Background technique

In the field of construction engineering technology, concrete exterior wall siding is a common façade construction method. Usually, prefabricated concrete siding is hung on the outside of the building wall by dry hanging, mainly for exterior decoration, heat preservation, etc. effect. Since the concrete exterior wall hanging board is suspended on the exterior facade of the building, the material and installation method should be considered firm and safe to ensure that the surface will not crack for a long time in the outdoor environment. At the same time, special consideration should be given to safety factors to prevent the Falls in the event of an earthquake, etc.

In the prior art, the concrete hanging board is relatively simple, most of which are directly slotted and dry hanging in the process of on-site construction, the installation efficiency is low, the proficiency of the installer is required to be high, and a large amount of noise pollution and dust will be generated. Pollution.

In addition, due to the limitation of the construction method, most of the existing concrete hanging panels are connected by limited fulcrums, and the stress is relatively concentrated, which has certain requirements on the strength of the concrete hanging panels. Cracking, with double-layer steel bars, it is difficult to control the weight and thickness, which is not only unsightly but also increases the cost. During installation and construction, due to the limited adjustment range, it is not easy for the installer to control the error. In the future, extreme weather and earthquake disasters are likely to cause cracking or falling due to limited activities.

In view of the problems of material strength, connection safety, and inconvenient installation of concrete hanging panels, many improvements have been proposed in the prior art. For example, Chinese Patent Publication CN104652671B discloses a prefabricated concrete external wall panel fixing device, including a wall top hanging part and a panel surface embedded part, the board surface embedded part can be connected with the wall top hanging part; the wall top hanging part includes " L"-shaped steel plate, the horizontal plate and the vertical plate of the steel plate are provided with openings, and the reinforcing steel plate is connected between the horizontal plate and the vertical plate; the back of the vertical plate is fixedly connected with at least two wing plates in the same direction. , the wing plate is provided with a number of through holes; the wing plate passes through a number of transverse steel bars, and the transverse steel bars are cross-connected with a number of vertical steel bars; the board surface embedded part includes a bottom plate, and the Connecting bolts are fixed above the bottom plate, and the bolts can be inserted into the openings on the horizontal plate of the steel plate; the bottom of the bottom plate is fixedly connected with a plurality of anchor bars. It has the advantages of stable and firm connection and convenient construction, but it still does not solve the problem of stress concentration of the concrete siding itself due to too few connection points between the siding and the facade. Therefore, multiple anchor bars have to be used to enhance the connection strength, resulting in concrete The prefabrication process of hanging panels is relatively complicated, and the use of more steel leads to an increase in prefabrication costs.

Chinese Patent Publication CN104234366A discloses a composite prefabricated external wall hanging panel pendant and its device, a composite external wall hanging panel pendant and its device, including a composite external wall hanging panel embedded part, a laminated beam pre-embedded part and a beam plate The installation connecting pick is characterized in that: the inner side of the composite external wall hanging board is provided with a concave cavity; the internal cavity is provided with an external wall hanging board embedded part formed by connecting a horizontal anchor point and a load-bearing pick piece. The left and right and upper sides of the embedded parts on the inner side of the concave cavity are respectively provided with anchoring ribs; the superimposed part in the superimposed beam is provided with pre-embedded parts; the upper end of the superimposed beam pre-embedded parts is provided with a beam plate Connecting pick pieces; the top of the composite outer wall hanging board is connected with the concrete column through the link pieces. It has the advantages of adjustable control position, flexible installation and convenient construction, which can improve the construction and installation efficiency of prefabricated buildings. However, the connection settings of the above-mentioned composite prefabricated external wall panel embedded parts, laminated beam embedded parts, and beam-slab installation connection picks are still too complicated, and there are many embedded parts and pre-embedded ribs. The cost of materials is high, and the connection point The stress is concentrated, and the connection strength and seismic performance are limited.

It can be seen that the prior art still needs to be improved.

SUMMARY OF THE INVENTION

In view of the above problems existing in the prior art, the purpose of the present invention is to provide a safe and sturdy external wall concrete hanging board with low cost, convenient installation and debugging.

In order to achieve the above purpose, the present invention provides an external wall concrete hanging board, which is mounted on the external wall of a building, and includes a first keel fixed on the external wall, a first keel connected to the first keel A connecting piece and a concrete hanging board fixed on the first connecting piece, a plurality of U-shaped connecting pieces are anchored on the outer wall, and a first clamping part is formed on the U-shaped connecting piece, and the The first keel is a first frame composed of a plurality of keel pieces, and at least some of the keel pieces are configured with a second engaging portion, and the second engaging portion is snap-fitted with the first engaging portion so as to The first keel is fixed on the outer wall.

Preferably, the first connecting piece includes a plurality of first fixing pieces fixed on the first keel, and a plurality of fixing rods respectively inserted and fixed between two adjacent first fixing pieces, And a plurality of the fixing rods and a plurality of the first fixing pieces are configured as a second frame with a plurality of insertion spaces; the concrete hanging board includes a plurality of hanging board units spliced with each other, each hanging board The unit is at least partially clamped and fixed in the insertion space.

Preferably, the fixing rod is provided with a first special-shaped groove along its length direction, and the periphery of the first fixing member is provided with a plurality of plugs that are inserted and fitted with the first special-shaped groove. The plate unit is at least partially embedded in the first special-shaped groove.

Preferably, the keel pieces constituting the first keel include a plurality of vertical keel pieces and a plurality of transverse keel pieces fixed on the vertical keel pieces, and the second engaging portion is arranged on the vertical keel pieces. on the keel piece; the transverse keel piece is provided with a second special-shaped groove along its length direction, and the first connecting piece includes a plurality of second fixing pieces that are inserted and fitted in the second special-shaped groove, so The concrete hanging board is connected to the first keel through the second fixing member.

Preferably, the second special-shaped groove includes a first groove body and a second groove body, the second fixing member includes a body that is fitted and fixed to the concrete hanging board, and plug connectors formed at both ends of the body respectively. The insertion part is configured to be inserted into the second groove body at least partially, and the overlap part is configured to be mounted on the outer side of the first groove body.

Preferably, the body is connected with the concrete hanging board through expansion bolts.

Preferably, the U-shaped connecting piece is formed by bending an elastic material, the bottom of the U-shaped groove constructed on the U-shaped connecting piece is provided with an anchor bolt connected to the outer wall, and the vertical keel piece is clamped and fixed on the outer wall. In the U-shaped groove, the two side walls of the U-shaped groove are provided with a tongue configured as the first clamping part facing each other near the end, and the vertical keel member located in the U-shaped groove is correspondingly provided There is a slot configured as the second engaging portion, and the tongue is snap-fitted with the slot.

Preferably, the plug tongue is configured as a trapezoid with at least one oblique side.

Preferably, the width of one side of the vertical keel member inserted into the U-shaped groove of the U-shaped connecting member is smaller than that of the opposite side, and the overall cross section is an isosceles trapezoid.

Preferably, an elastic positioning protrusion that can produce elastic deformation under the action of an external force is juxtaposed at the position where the slot is arranged on the vertical keel. Locating convex matching locating holes.

Compared with the prior art, the external wall concrete hanging board provided by the present invention is fixed on the external wall through the connection of the first keel and the U-shaped connecting piece, the on-site installation is convenient and quick, the installation error is easy to control, and it can be applied to various precast concrete hanging boards. . In a further embodiment, the U-shaped connecting piece is formed by bending an elastic material, the vertical keel is provided with an elastic positioning protrusion, and correspondingly, the inner wall of the U-shaped groove is provided with a positioning hole matching the elastic positioning protrusion. In this way, the installation work is further simplified, and the installation and fixing are very convenient. In the solution of the snap fit between the tongue of the first snap portion of the U-shaped groove and the slot of the second snap portion of the vertical keel located in the U-shaped groove, not only the on-site installation and construction are very convenient and fast , and the connection is firm, and at the same time, the elastic fittings further improve the seismic resistance of the concrete hanging board, and it is not easy to fall in extreme weather and earthquake disasters. In a preferred solution, there are a plurality of second frames with insertion spaces, and the concrete hanging board includes a plurality of hanging board units that are spliced with each other. In this way, the hanging board units are at least partially clamped and fixed in the insertion space. Compared with the traditional technology, which uses multiple fulcrums to connect the hanging panel units, the safety is further improved. The prefabrication process of concrete hanging panels does not require more reinforcement or embedded parts, and the hanging panels can be made light and thin, while saving energy. cost. Due to the dispersion of the stress of the concrete siding, the siding is not easy to crack or fall under extreme weather in a long-term outdoor environment.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the present disclosure.

This document provides a summary of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional explosion structure of a first embodiment of an exterior wall concrete hanging board of the present invention.

FIG. 2 is a schematic structural diagram of a keel member (including a U-shaped connecting member) of the first embodiment of an external wall concrete hanging board according to the present invention.

3 is a schematic diagram of a three-dimensional explosion structure of another embodiment of the keel member of the first embodiment of an exterior wall concrete hanging board of the present invention.

FIG. 4 is a schematic three-dimensional structural diagram of an anchor bolt for anchoring a U-shaped connector according to the first embodiment of an external wall concrete hanging board according to the present invention.

FIG. 5 is a schematic structural diagram of a hanger unit fixing member of a first embodiment of an external wall concrete hanger according to the present invention.

FIG. 6 is a schematic three-dimensional structure diagram (including a partial enlarged view) of a second embodiment of an exterior wall concrete hanging board according to the present invention.

FIG. 7 is another three-dimensional structural schematic diagram (including a partial enlarged view) of a second embodiment of an external wall concrete hanging board according to the present invention.

FIG. 8 is a schematic diagram (including a partial enlarged view) of the connection structure between the hanging board unit and the first connecting piece according to the second embodiment of an external wall concrete hanging board according to the present invention.

Main reference signs:

100...exterior wall; 200...first keel; 300...first connecting piece; 400...siding unit; 500...second fixing piece; 201...U-shaped connecting piece; 202...vertical keel piece; 203...transverse keel piece 301...first fixing part; 302...fixing rod; 303...connecting panel; 501...plug-in part; 502...overlapping part; Connector body; 2012…Anchor bolt; 2013…Second fixing bolt; 3021…First special-shaped slot; 3022…Clamping slot; 3031…Clamping end; ...first shrapnel; 20111...threaded hole; 20112...insert tongue; 20113...beveled edge; 20211...slot; 20121...anchor bolt body; 20122...fastening nut; 20123...neck end; 20124...clamp; 20125... The second expansion end; 20126...the second elastic piece.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure.

Obviously, the described embodiments are some, but not all, embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in this disclosure, "comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of well-known functions and well-known components.

As shown in FIG. 1 and FIG. 2 , the present invention provides a first embodiment of a concrete hanging board for an external wall. A concrete hanging board (not marked) composed of a plurality of hanging board units 400 is mounted on the building through the hanging structure. On the outer wall 100 , the mounting structure includes a first keel 200 fixed on the outer wall 100 , a first connecting piece 300 connected on the first keel 200 , and a first connecting piece 300 fixed on the first connecting piece 300 The outer wall 100 is anchored with a plurality of U-shaped connectors 201 through anchor bolts 2012, and the U-shaped connectors 201 are configured with a first clamping part (not marked in the figure), the The first keel 200 is a first frame composed of a plurality of keel pieces, and at least some of the keel pieces are formed with a second engaging portion. In the example of FIG. 1 , the snap connection is achieved by the elastic clamping of the U-shaped connector 201 and the fixing of the second fixing bolt 2013 . The second engaging portion is engaged with the first engaging portion, so that the first keel 200 is fixed on the outer wall 100 . It can be understood that, in the present invention, the U-shaped connector 201 is made of elastic material to form a snap connection, and at the same time, it is fixed with bolts, which can make the construction and installation of the concrete hanging plate convenient and fast, and the connection is firm.

Specifically, in the embodiment shown in FIG. 1 , the first connecting member 300 may specifically include a plurality of first fixing members 301 fixed on the first keel 200 , and a plurality of first fixing members 301 fixed on the first keel 200 by plugging and fixing respectively. The fixing rods 302 between the two first fixing members 301 are adjacent to each other, and the plurality of the fixing rods 302 and the plurality of the first fixing members 301 are configured as second fixing rods with a plurality of insertion spaces (not marked). Frame (not marked); the concrete hanging board includes a plurality of hanging board units 400 spliced with each other, and each of the hanging board units 400 is at least partially clamped and fixed in the insertion space. More specifically, the first connecting member 300 can be fixed on the first keel 200 by means of bolting or the like, and is further spliced into a same specification by a plurality of first fixing members 301 of different shapes and fixing rods 302 of the same structure. The grid-shaped second frame, and at this time, a plurality of suspending plate units 400 constituting the concrete suspending plate can be constructed by being embedded in each grid. This embedding process can be realized by providing a first special-shaped groove 3021 through the fixing rod along its length direction, and at the same time, the first special-shaped groove 3021 can also realize the connection with the first fixing member 301 . Specifically, the periphery of the first fixing member 301 is provided with a plurality of inserting falcons (not marked in the figure) that are plug-fitted with the first special-shaped groove 3021, and more importantly, the hanging plate unit 400 can be at least partially embedded in the first special-shaped groove 3021 to achieve assembly. As a further improvement, in some embodiments, as shown in FIG. 1 , the first connecting member further includes a connecting panel 303 , and two sides of the connecting panel are configured with snap ends 3031 , which are close to each other. A fixing hole is formed on one side of the scraper unit 400 , and correspondingly, two opposite sides of the inner wall of the first groove 3021 are formed with a clamping portion 3022 that is engaged with the clamping end 3031 . In this way, during construction, a plurality of connecting panels 303 can be glued or screwed on the connecting panels 303 in advance according to preset specifications, and when construction is required, the connecting panels 303 can be directly connected to the first special-shaped groove through the connecting panels 303. The cooperation of 3021 realizes snap-fit and fixation. Compared with the embedded method, this method can make the joints between the plurality of hanging panel units 400 smaller, with higher aesthetics and better connection stability and subsequent maintainability.

In some embodiments of the present invention, as shown in FIG. 6 and FIG. 7 , the keel member constituting the first keel 200 includes a plurality of vertical keel members 202 and a plurality of vertical keel members 202 fixed on the vertical keel member 202 A plurality of transverse keel pieces 203 , wherein FIG. 3 shows a schematic diagram of the connection structure of an improved vertical keel piece 202 and the U-shaped connecting piece 201 . As shown in FIG. 3 , the width of one side of the vertical keel member 202 inserted into the U-shaped groove of the U-shaped connecting member 201 is smaller than that of the opposite side, and the overall cross section is an isosceles trapezoid. In this way, the technical effect of easier assembly is achieved. At the same time, the U-shaped connector 201 can be formed by bending an elastic material (such as steel sheet or ABS), and the bottom of the U-shaped groove constructed thereon is provided with an anchor bolt connected to the outer wall 100 . The keel member 202 is clamped and fixed in the U-shaped groove. The two side walls of the U-shaped groove are provided with a tongue 20112 configured as the first clamping part facing each other near the end, located in the U-shaped groove. The inner vertical keel member 202 is correspondingly provided with a slot 20211 configured as the second engaging portion, and the insertion tongue 20112 is snap-fitted with the slot 20211 . In this embodiment, a more convenient assembly can be achieved. In addition, a shallow groove 2021 may be processed at the position of the slot 20211 on the vertical keel member 202 , and the slot 20211 is located in the shallow slot 2011 . In this way, the plug tongue 20112 can smoothly slide along the shallow groove 2021 and slide into the slot 20211 to achieve plug-and-match. As a further improvement, it can also be considered that the insertion tongue 20112 is configured as a trapezoid with at least one side bevel 20113 . This structure can make the insertion tongue 20112 slide in the shallow slot 2021 with less resistance and be easier to slide into the slot 20211 . Of course, in this solution, the elastic properties of the U-shaped connector 201 still need to be relied on. Specifically, the U-shaped connector body 2011 of the U-shaped connector 201 needs to be at least made of elastic material. In addition, a screw hole for the anchor bolt 2012 to pass through needs to be opened on the U-shaped connector body 2011 . As a further improvement, in some embodiments, an elastic positioning protrusion (not shown) that can produce elastic deformation under the action of an external force is juxtaposed at the position where the slot 20211 is disposed on the vertical keel member 202, corresponding to The inner wall of the U-shaped groove is provided with a positioning hole matched with the elastic positioning protrusion. This further enhances the fixation effect.

On the basis of the above solution, the second engaging portion can be specifically arranged on the vertical keel member 202; the transverse keel member 203 is provided with a second special-shaped groove (not marked) through the longitudinal direction thereof, In fact, the second special-shaped groove can be composed of the first groove body 2032 and the second groove body 2031 . In this embodiment, the first connector is actually different from the first embodiment. As shown in FIG. 7 and FIG. The second fixing member 500 , the concrete hanging board is connected to the first keel 200 through the second fixing member 500 . The second fixing member 500 specifically includes a body that is attached and fixed to the concrete hanging board, and a plug portion 501 and an overlap portion 502 respectively formed at both ends of the body, and the plug portion 501 is structured In order to be at least partially inserted into the second groove body 2031 , the overlapping portion 502 is configured to be mounted on the outside of the first groove body 2032 . In some applications, the second fixing member 500 can be pre-fixed on the hanging board unit 400, and then the hanging board unit 400 is tilted to insert the plug portion 501 into the second groove body 2031, and then the hanging board unit 400 is connected to the outside. After the wall 100 is leveled, the mounting of the overlapping portion 502 is realized. Meanwhile, at this time, the second fixing member 500 can still slide in the second special-shaped groove to adjust the assembly position. After the adjustment is made properly, the second fixing member 500 and the transverse keel member 203 can be fixed by the first fixing bolts 503 to finally complete the assembly.

FIG. 4 shows a schematic structural diagram of the anchor bolt used to fix the U-shaped connector 201 on the outer wall 100. As shown in FIG. 4, since the outer wall of the concrete hanging board is generally rough and uneven, if the The traditional expansion screw may cause the problem of unstable mounting. Therefore, in the present invention, the anchor bolt 2012 shown preferably includes an anchor bolt body 20121 and a tightening nut 20122, and the anchor bolt body 20121 is configured as a thin neck end 20123 near the end, and the anchor bolt body rests on the thin neck. The end 20123 is provided with a clamp 20124, and the thin neck end 20123 is sleeved with a second expansion end 20125, and the second expansion end 20125 can be composed of a plurality of second elastic pieces 20126. The clamp 20124 is configured to constrain the second elastic pieces 20126 on the narrow neck end 20123 and to retreat when inserted into the outer wall 100 to release the constraint, and at this time, the plurality of second elastic pieces 20126 expand radially outward to achieve fixation. Different from general expansion screws, it does not rely on the linkage of the tightening nut, and the stress damage to the wall surface is small, so it can achieve better mounting effect.

5 shows a schematic structural diagram of the fixing member 504 of the hanging plate unit. As shown in FIG. 5 , it includes a fixing member body 5041 and a first expansion end 5042 , and the first expansion end 5042 includes a plurality of first elastic pieces 50421 . The hanging plate unit fixing member 504 can realize the fixed connection between the second fixing member 500 and the hanging plate unit 400 .

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the spirit and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims (9)

1. An outer wall concrete hanging board, mounted on the outer wall of a building, comprising a first keel fixed on the outer wall, a first connector connected on the first keel, and a first connector fixed on the outer wall. The concrete hanging board on the first connecting piece, the outer wall is anchored with a plurality of U-shaped connecting pieces, the U-shaped connecting piece is configured with a first clamping part, and the first keel is composed of a plurality of U-shaped connecting pieces. The first frame formed by the keel piece, at least part of the keel piece is formed with a second engaging portion, and the second engaging portion is engaged with the first engaging portion to fix the first keel On the outer wall; the first connecting piece includes a plurality of first fixing pieces fixed on the first keel, and a plurality of first fixing pieces which are respectively inserted and fixed between two adjacent first fixing pieces the fixing rods, and the plurality of the fixing rods and the plurality of the first fixing pieces are configured as a second frame with a plurality of insertion spaces; the concrete hanging board includes a plurality of mutually spliced hanging board units, each The hanging plate unit is at least partially clamped and fixed in the insertion space; a plurality of the first fixing parts of different shapes and the fixing rods of the same structure are spliced to form the grid-shaped second second fixing members of the same specification. a frame, the hanging board unit is embedded in each grid; the first connecting piece further includes a connecting panel, the two sides of the connecting panel are configured with snap ends, and are close to the hanging board One side of the unit is configured with a fixing hole, and correspondingly, two opposite sides of the inner wall of the first slot are configured with a snap-fit portion for snap-fit with the snap-fit end. 2 . The concrete hanging board for exterior wall according to claim 1 , wherein a first special-shaped groove is formed through the fixing rod along the length direction thereof, and a plurality of the first special-shaped grooves are arranged on the periphery of the first fixing member. 3 . A plug-in fitted falcon is formed, and the hanging plate unit is at least partially embedded in the first special-shaped groove. 3. The external wall concrete siding as claimed in claim 1, wherein the keel pieces constituting the first keel comprise a plurality of vertical keel pieces and a plurality of transverse keel pieces fixed on the vertical keel pieces, The second clamping part is arranged on the vertical keel piece; the transverse keel piece is provided with a second special-shaped groove along its length direction, and the first connecting piece includes a plurality of plug-in fittings on the A second fixing piece in the second special-shaped groove, the concrete hanging plate is connected to the first keel through the second fixing piece. 4. The external wall concrete hanging board according to claim 3, the second special-shaped groove comprises a first groove body and a second groove body, and the second fixing member comprises a body that is fitted and fixed with the concrete hanging board , and a plug portion and a lap portion respectively formed at both ends of the body, and the plug portion is configured to be at least partially inserted into the second groove, and the lap portion is configured to be mounted on on the outside of the first groove body. 5. The external wall concrete hanging board according to claim 4, wherein the body is connected with the concrete hanging board through expansion bolts. 6. The external wall concrete hanging board as claimed in claim 3, wherein the U-shaped connector is formed by bending elastic material, and the bottom of the U-shaped groove constructed on the U-shaped groove is provided with a fixing bolt connected with the external wall, The vertical keel is clamped and fixed in the U-shaped groove, and the two side walls of the U-shaped groove are opposite to each other near the ends. A slot configured as the second engaging portion is correspondingly provided on the vertical keel in the slot, and the insertion tongue is snap-fitted with the slot. 7 . The concrete siding for exterior walls as claimed in claim 6 , wherein the tongue is configured as a trapezoid with at least one side hypotenuse. 8 . 8. The external wall concrete hanging board according to claim 6, wherein the width of one side of the vertical keel inserted into the U-shaped groove is smaller than that of the opposite side, and the overall cross section is an isosceles trapezoid. 9 . The concrete hanging board for external wall according to claim 6 , the position where the slot is arranged on the vertical keel member is juxtaposed with an elastic positioning protrusion that can produce elastic deformation under the action of an external force, and the corresponding said The inner wall of the U-shaped groove is provided with a positioning hole matched with the elastic positioning protrusion.

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