Autoclaved lightweight concrete plate

Abstract

The invention belongs to the technical field of building materials, and particularly relates to an autoclaved lightweight concrete plate which comprises a concrete body and a framework. The concrete body comprises cement, steel fiber, expanded clay and the like. The framework comprises a left end plate, a right end plate, a plurality of connecting ribs, a plurality of connected blocks and a plurality of connecting pieces. A connected block is fixed in the through hole of the left end plate, the outer end faces of the connected block and the left end plate are flush, and a cavity port formed in the connected block faces outwards. A slotted hole structure is formed in the right end plate, a port of the slotted hole structure faces the outer side and is fixedly provided with an upper connecting piece, and a U-shaped arm on the connecting piece extends outwards. The left end plate and the right end plate are connected into a whole through a plurality of connecting ribs; the U-shaped arm on the connecting piece can be connected with the cavity in the connected block in an inserted mode. According to the invention, by improving the framework and adaptively adjusting the components and the proportion, the condition of cracking after a wall is built by the plates can be effectively inhibited, and the building quality of the wall is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and in particular relates to an autoclaved lightweight concrete plate. Background Art

[0002] Autoclaved lightweight concrete panels are widely used because of their good thermal insulation performance and the characteristics of being lightweight, soundproof, energy-saving and environmentally friendly. The main raw materials of autoclaved lightweight concrete panels include cement, lime, fly ash and slag, etc., and appropriate amounts of auxiliary ingredients such as gas generating agents, bubble stabilizers and regulators are added at the same time. After being mixed and stirred evenly and stirred into slurry with water, a porous concrete product is obtained after pouring, static stopping / static curing, cutting, high-pressure steam curing and other processes. It is also often called autoclaved aerated concrete panels. As an emerging building material, autoclaved lightweight concrete panels require the edges and corners of the panels to be aligned with each other during the masonry construction process, and the panels contained in the rows and columns formed by the arrangement are required to meet the standards of compact contact and high end surface fit. Therefore, the degree of dependence on the construction experience or level of the workers in the masonry construction is relatively high, and there are problems such as slow masonry speed and easy cracking of the wall obtained by masonry at the joint position of the panels. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides an autoclaved lightweight concrete board, which helps to effectively suppress the occurrence of cracks that may occur after the board is built into a wall.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an autoclaved lightweight concrete plate, including a concrete body and a skeleton. The concrete body contains the following ingredients in parts by weight: 30 to 45 parts of cement, 10 to 25 parts of lime, 5 to 8 parts of fly ash, 0.5 to 2.5 parts of aluminum-containing slag, 1 to 2.5 parts of steel fiber, and 0.5 to 3.5 parts of expanded clay. The skeleton includes a left end plate, a right end plate, a plurality of connecting ribs, a plurality of receiving blocks, and a plurality of connecting parts.

[0005] The receiving blocks are fixedly installed in the multiple through holes opened on the left end plate respectively, so that the outer end surface of the receiving block is flush with the outer end surface of the left end plate and the port of the cavity formed on the outer end surface of the receiving block faces outward.

[0006] A slot structure is formed on the right end plate, which can be opposite to the distribution position of each receiving block, and the port of the slot structure is facing outward. The connecting pieces are fixedly installed at the slot structure of the right end plate, so that the U-shaped arm formed at the free end side of the connecting piece extends outward relative to the outer end surface of the right end plate.

[0007] The left end plate and the right end plate are connected into a whole by a plurality of connecting ribs, so that the U-shaped arm on the connecting piece can establish a plug-in connection relationship with the cavity on the receiving block.

[0008] Optionally, in parts by weight, the steel fiber is 1.3 to 2.0 parts, and the expanded clay is 0.5 to 1.3 parts.

[0009] Optionally, a radially extending edge plate is formed on the outer wall of the receiving block and near its closed end. A pair of front and rear opposite wedge-shaped convex strips are formed on the inner wall of the cavity and near the inner bottom, so that the protruding ends of the wedge-shaped convex strips are relatively close to the inner bottom surface of the cavity, and a clamping groove or a clamping edge structure can be formed inside the cavity. The receiving block is interference-matched with the through hole on the left end plate, and the edge plate contacts the inner wall of the left end plate at the periphery of the inner port of the through hole.

[0010] The ends of the two arm plates of the U-shaped arm and the outer surfaces of each arm plate are provided with latching teeth, and an elastic deformation zone is also formed at the root of the arm plate. After the connector is installed on the right end plate, the two arm plates on the U-shaped arm are arranged front and back relative to each other, and the latching teeth on the arm plate located at the front side are protruded toward the front side; and the latching teeth on the arm plate located at the rear side are protruded toward the rear side. The elastic deformation zone can cause the two arm plates of the U-shaped arm to produce elastic deformation from their roots, and the free ends of the two arm plates can move toward and away from each other, so that the front and rear positions of the latching teeth on the two arm plates change.

[0011] The U-shaped arm is gradually inserted into the mold cavity, and the front and rear wedge-shaped convex strips can contact the outer side surfaces of the front and rear two clamping teeth respectively, and can force the two clamping teeth to move forward or backward, so as to cause the two arm plates to produce elastic deformation, so that the free ends of the arm plates gradually approach each other, and finally the two clamping teeth can simultaneously go around the inner side of the protruding ends of the two wedge-shaped convex strips, and respectively establish a connection relationship of mold contact matching with the two clamping grooves, and connect the receiving block and the connecting piece in the left and right directions to form a whole.

[0012] Optionally, an elastic pad is fixedly provided on the inner bottom surface of the cavity. After the U-shaped arm is inserted into the cavity and the latch tooth matches the latch groove, the free end of the latch tooth can remain in a state of being sunk into the elastic pad, that is, the end surface of the latch tooth can compress the elastic pad to undergo elastic deformation, so that the end of the latch tooth is pressed into the elastic pad.

[0013] Optionally, a coating is applied on the outer end surface of the left end plate and / or on the outer end surface of the right end plate, and the coating can produce elastic deformation in the left-right direction. In other words, an elastic coating is applied on the outer end surface of the left end plate and / or on the outer end surface of the right end plate.

[0014] Optionally, a threaded hole corresponding to the connecting piece is provided on the right end plate, that is, the slot structure on the right end plate is a threaded hole. A screw body is formed on the connecting piece, and the screw body is matched with the threaded hole on the right end plate, so that the connecting piece is fixedly installed on the right end plate.

[0015] Optionally, the slot structure on the right end plate includes a slot part 1 and a plurality of slot parts 2 formed on the outer end wall surface of the right end plate, and the slot part 1 is located at the edge of the wall surface, and the slot part 2 is located inside the wall surface. The slot part 1 and the plurality of slot parts 2 are distributed alternately front and back. A straight-line plug interface extending in the front-to-back direction is formed on the slot part 1. The slot part 2 is an L-shaped slot, and the long side end of the L-shaped slot is extended toward the end side of the slot part 2 away from the slot part 1, so that a straight-line plug interface with the same extension direction can be formed on the slot part 1 and the slot part 2.

[0016] Correspondingly, the connector is fixedly arranged on the movable carrier. A hook arm 1 that can be matched with the groove part 1 is formed on the movable carrier, and a plurality of hook arms 2 that can be matched with the groove part 2 are formed. The hook arm 1 can establish a plug-in fixed connection with the groove part 1 along the front-back direction, and at the same time, the hook arm 2 can establish a plug-in fixed connection with the groove part 2 along the front-back direction, and the movable carrier is fixedly installed on the right end plate, so that during the masonry operation, multiple connectors can be quickly fixed on the right end plate, thereby improving the masonry efficiency.

[0017] If the groove part 1 is located at the rear edge of the outer end wall of the right end plate, then the plurality of groove parts 2 are relatively located in front of the groove part 1 and formed inside the outer end wall. During operation, the hook arm 1 is gradually inserted into the groove part 1 from the rear side to the front side, and the hook arm 2 first extends into the rear side of the groove part 2, and then moves toward the front side relative to the groove part 2 to be inserted into the groove part 2.

[0018] Optionally, multiple layers of connecting ribs are alternately arranged in the vertical direction, and the number of connecting ribs in each layer is multiple. The height position of the connecting ribs located in the uppermost layer is lower than the upper end surface of the left end plate and the upper end surface of the right end plate, and the height position of the connecting ribs located in the lowermost layer is higher than the lower end surface of the left end plate and the lower end surface of the right end plate. The multiple connecting ribs in each layer are alternately arranged in the front-to-back direction.

[0019] Optionally, a plurality of convex columns extending vertically upward and a plurality of convex columns extending vertically downward are formed on the connecting ribs. A movable pipe group is fixedly provided on at least part of the convex columns extending upward, and a fixed pipe group is fixedly provided on at least part of the convex columns extending downward, and the distribution positions of the movable pipe groups are vertically aligned with the distribution positions of the fixed pipe groups one by one, and a certain verticality deviation is satisfied.

[0020] The moving tube group includes an outer tube, a tongue rod and a pusher arranged in a multi-step countersunk hole formed on the upper part of the outer tube. The pusher includes a bottom block and a spring-shaped capsule. The lower end of the outer tube is fixedly connected to the convex column and can keep the outer tube in a state of extending in the vertical direction, that is, the tube cavity of the moving tube group is kept in a state of extending upward in the vertical direction. The upper part of the fixed tube group is fixedly connected to the convex column and can keep the tube cavity of the fixed tube group in a state of extending downward in the vertical direction.

[0021] The lower end of the spring-shaped sac is fixedly connected to the bottom block and the connecting cavity formed on the bottom block is connected to the sac cavity of the spring-shaped sac. A radial flange is formed in the middle of the tongue rod and after the lower part of the tongue rod is inserted into the upper end of the spring-shaped sac, the lower end face of the radial flange contacts the upper end face of the spring-shaped sac. The side wall of the radial flange can contact the inner wall of the upper part of the multi-step countersunk hole, so that the tongue rod can move in the vertical direction relative to the outer tube. Grouting holes are formed on the wall of the connecting cavity, and pipe fittings are provided between the grouting holes of the multiple push parts, and the connecting cavities on each push part are connected to each other by the pipe fittings. In the initial state, the upper part of the tongue rod corresponds to the upper hole cavity of the multi-step countersunk hole, and the upper end of the tongue rod is relatively located on the inner side of the upper port of the outer tube.

[0022] Between two stacked plates, the tongues of the movable tube groups on the lower plate can be inserted into the tube cavities of the fixed tube groups on the upper plate, thereby fixing and connecting the two stacked plates in the vertical direction.

[0023] The outer diameter of the upper part of the tongue bar is not larger than the inner diameter of the tube cavity of the fixed tube group, preferably the former is smaller than the latter, and it is also preferred that a partial wall section of the upper part of the tongue bar and a partial tube cavity of the fixed tube group can be formed into an interference fit relationship by an elastic member placed between the relative circumferences of the two. For example, this can be achieved by sleeve-arranging an elastic gasket on the wall of the upper part of the tongue bar, or by arranging an elastic convex rib on the inner side of the inner wall of the tube cavity of the fixed tube group.

[0024] In order to prevent the slurry from flowing into the outer tube and the tube cavity of the fixed tube group during the grouting process, a sealing body can be provided at the upper end of the outer tube and at the lower end of the tube cavity of the fixed tube group. The sealing body can be a sealing film body; or a matching body composed of a plug ring and a sealing cap. The upper end of the tongue rod can be formed into a tip (cone) or a cone column. The outer diameter of the lower end of the tip is not greater than the outer diameter of the upper part of the tongue rod, and the outer diameter of the lower end of the cone column is not greater than the outer diameter of the upper part of the tongue rod.

[0025] Optionally, the skeleton further comprises two mesh bodies, wherein one mesh body matches each moving tube group arranged above the connecting rib, and the other mesh body matches each fixed tube group arranged below the connecting rib.

[0026] A through hole channel with an axis in the vertical direction is formed on the mesh body. Both the moving tube group and the fixed tube group can extend upward or downward through the through hole channel on the mesh body, and the outer wall of the moving tube group and the outer wall of the fixed tube group are respectively in contact with the inner wall of each through hole channel to establish an interference fit relationship.

[0027] The beneficial effects of the present invention are as follows: the present invention adjusts the skeleton structure of the autoclaved lightweight concrete board and adaptively adjusts the components of the concrete body of the autoclaved lightweight concrete board to make it compatible with the improved skeleton structure and form a firm and stable combination; after optimizing the skeleton structure, the connection form between the autoclaved lightweight concrete boards is improved, which can improve the compactness, stability and reliability of the masonry joint surfaces between the boards, and help to effectively suppress the cracking of the boards after they are built into a wall, and help to greatly reduce the probability of cracking after the boards are built into a wall, and can suppress the size of the gaps formed once cracks occur, so that the cracks are formed into narrow cracks at most, which is convenient for later repair. In addition, the skeleton structure of the board involved in the present invention also helps to greatly improve the operating efficiency of masonry construction, reduce the dependence on the operator's experience in masonry operations, and help to achieve modular production and manufacturing of boards.

[0028] By coating the outer end surface of the left end plate and / or the right end plate with an elastic coating, the possibility of cracks between the butting surfaces of the plates can be nearly eliminated; by allowing the paste fluid injected into the spring-shaped bladder to burst the bladder wall of the spring-shaped bladder after reaching a certain internal pressure, and flow into the space between the opposite surfaces of the two butted plates and into the tube cavity of the fixed pipe group that is wrapped around the tongue rod and filled in, the stability of the stacking of the plates in the vertical plane can be greatly improved, the overall masonry effect between the plates can be significantly improved, and the possibility of lateral displacement of the two plates can be further effectively suppressed, which helps to further suppress the occurrence of cracks after the plates are built into a wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention in a top view.

[0030] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention.

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of the skeleton in the present invention when viewed from above.

[0032] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0033] Figure 5 It is a schematic diagram of the cross-sectional structure of the receiving block in the present invention.

[0034] Figure 6 It is a schematic diagram of the side structure of the receiving block in the present invention.

[0035] Figure 7 It is a schematic diagram of the cross-sectional structure of the connecting piece in the present invention.

[0036] Figure 8 It is a schematic diagram of the side structure of the connecting piece in the present invention.

[0037] Fig. 9 This is a schematic diagram of the concrete slabs according to the present invention being connected in the transverse direction by means of their skeletons.

[0038] Fig.10 for Fig. 9 Schematic diagram of the local enlarged structure at point B in the middle.

[0039] Fig.11 It is a schematic diagram of the structure of the transverse connection of the plates involved in the present invention.

[0040] Fig.12 for Fig.11 Schematic diagram of the local enlarged structure at point C in the middle.

[0041] Fig.13 It is a schematic diagram of the assembly process of the skeleton optimization structure in the present invention.

[0042] Fig.14 It is a schematic diagram of another improved structure of the skeleton in the present invention.

[0043] Fig.15 It is a cross-sectional schematic diagram of the plate materials involved in the present invention being connected in the vertical direction by means of their framework.

[0044] Fig.16 for Fig.15 Schematic diagram of the local enlarged structure at point D in the middle.

[0045] In the figure: 100 plate; 200 frame; 10 concrete body; 20 mesh body; 30 left end plate, 31 through hole; 40 right end plate, 41 threaded hole, 42 movable carrier plate, 421 hook arm 1, 422 hook arm 2, 43 groove part 1, 44 groove part 2; 50 connecting rib, 51 convex column; 60 receiving block, 61 cavity, 62 edge plate, 63 wedge convex strip, 64 slot, 65 elastic pad; 70 connecting piece, 71 U-shaped Arm, 711 latching teeth, 712 elastic deformation zone, 72 screw body; 80 moving tube group, 81 outer tube, 811 multi-step countersunk holes, 812 conical surface, 813 radial inclined grooves, 82 tongue rod, 821 radial flange, 822 tip, 83 pushing part, 831 bottom block, 8311 connecting cavity, 8312 grouting hole, 832 spring-shaped capsule, 84 plug ring, 85 sealing cap, 851 top wall; 90 fixed tube group, 91 sealing membrane body. DETAILED DESCRIPTION

[0046] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0047] Figures 1 to 16 The autoclaved lightweight concrete board (hereinafter referred to as board 100) is shown, which is different from the existing autoclaved lightweight concrete board in that it contains a skeleton 200 with an innovative structure. At the same time, the ingredients and proportions for forming the concrete body 10 are adaptively adjusted according to the prior art to ensure that a reliable, firm and tight bonding relationship can be established between the skeleton 200 and the concrete body 10, meet the toughness requirements, and ensure that the present invention can achieve the desired effect.

[0048] The plate 100 of the present invention comprises a concrete body 10 and a skeleton 200. The concrete body 10 comprises the following ingredients in parts by weight: 30 to 45 parts of cement, 10 to 25 parts of lime, 5 to 8 parts of fly ash, 0.5 to 2.5 parts of aluminum-containing slag, 1 to 2.5 parts of steel fiber, and 0.5 to 3.5 parts of expanded clay. Preferably, the concrete body 10 further comprises the following ingredients in parts by weight: 1.3 to 2.0 parts of steel fiber and 0.5 to 1.3 parts of expanded clay. The skeleton 200 comprises a left end plate 30, a right end plate 40, a plurality of connecting ribs 50, a plurality of receiving blocks 60, and a plurality of connecting members 70.

[0049] The receiving blocks 60 are fixedly installed in the multiple through holes 31 opened on the left end plate 30 respectively, so that the outer end surface of the receiving block 60 is flush with the outer end surface of the left end plate 30 and the port of the cavity 61 formed on the outer end surface of the receiving block 60 faces outward.

[0050] A slot structure is formed on the right end plate 40 to be opposite to the distribution position of each receiving block 60, and the end of the slot structure is oriented outward. The connecting members 70 are fixedly installed at the slot structure of the right end plate 40, so that the U-shaped arm 71 formed at the free end side of the connecting member 70 protrudes outward relative to the outer end surface of the right end plate 40.

[0051] The left end plate 30 and the right end plate 40 are connected as a whole by a plurality of connecting ribs 50 so that the U-shaped arm 71 on the connecting member 70 can establish a plug-in connection relationship with the cavity 61 on the receiving block 60 .

[0052] The preparation method of the above-mentioned autoclaved lightweight concrete board generally includes the following process.

[0053] To prepare the slurry, evenly mix 30 to 35 parts of cement, 10 to 15 parts of lime, 5 to 8 parts of fly ash, 0.5 to 1.0 parts of aluminum slag, 1.2 to 1.5 parts of steel fiber, and 0.8 to 1.2 parts of expanded clay, and add water to stir into a slurry.

[0054] The skeleton 200 is assembled, and receiving blocks 60 are fixedly installed in the multiple through holes 31 opened on the left end plate 30, so that the outer end surface of the receiving block 60 is flush with the outer end surface of the left end plate 30 and the port of the cavity 61 formed on the outer end surface of the receiving block 60 faces outward. The port of the slot structure formed on the right end plate 40 faces outward and the distribution position of each slot structure corresponds to the distribution position of each receiving block 60 on the left and right; the left end plate 30 and the right end plate 40 are connected as a whole by multiple connecting ribs 50. The connecting ribs 50 can be distributed in multiple layers in the vertical direction and each layer contains multiple connecting ribs 50. The height position of the connecting ribs 50 located at the uppermost layer should be lower than the upper end surface of the left end plate 30 and the upper end surface of the right end plate 40, and the height position of the connecting ribs 50 located at the lowermost layer should be higher than the lower end surface of the left end plate 30 and the lower end surface of the right end plate 40. Generally, the upper end surface of the left end plate 30 is flush with the upper end surface of the right end plate 40 , and the lower end surface of the left end plate 30 is flush with the lower end surface of the right end plate 40 .

[0055] During casting, the assembled skeleton 200 is placed in the groove of the mold, so that the outer end surface of the left end plate 30 and the outer end surface of the right end plate 40 are respectively attached to the left inner wall and the right inner wall of the groove to block the ports of each cavity 61 and the ports of each slot structure to prevent the slurry from flowing in. The toughness and crack resistance of the plate 100 are improved by adding steel fiber and expanded clay, so that the concrete body 10 formed by the hardening of the slurry can be tightly and firmly combined with the skeleton 200 to form a whole, which is not easy to loosen due to vibration during transportation, moving, masonry construction and other operations.

[0056] Curing: send the mold filled with slurry into the curing room for gasification and curing. The room temperature in the curing room is controlled at 50 to 75 degrees Celsius, and the curing time is controlled at 1.3 to 2.5 hours.

[0057] Steam curing: the board 100 after static curing is placed in a steam curing kettle for high-pressure steam curing. The steam curing temperature is controlled at 180 to 210 degrees Celsius, and the pressure in the kettle is controlled at 1.1 to 1.3 MPa.

[0058] The connecting member 70 is fixedly installed at the slot structure of the right end plate 40 , so that the U-shaped arm 71 formed on the free end side of the connecting member 70 protrudes outward relative to the outer end surface of the right end plate 40 .

[0059] The left end plate 30 on one plate 100 is laid opposite to the right end plate 40 on the other plate 100, and the receiving blocks 60 distributed on the left end plate 30 are matched with the connecting pieces 70 provided on the right end plate 40, and the U-shaped arms 71 on each connecting piece 70 can be inserted into the cavity 61 of each receiving block 60 to complete the lateral connection between the two plates 100. The connecting piece 70 may not be installed on the plate 100 laid at the end, and the slot structure on the right end plate 40 may be sealed with a paste such as cement, putty, etc.

[0060] A radially extending edge plate 62 is formed on the outer wall of the receiving block 60 and near the closed end of the receiving block 60. A pair of front-to-back wedge-shaped convex strips 63 are formed on the inner wall of the cavity 61 and near the inner bottom, and the protruding end of the wedge-shaped convex strip 63 is relatively close to the inner bottom surface of the cavity 61, and a slot 64 (or a slot structure) is formed inside the cavity 61. After the receiving block 60 is fixed on the left end plate 30, the edge plate 62 contacts the inner wall (of the left end plate 30) at the periphery of the inner port of the through hole 31, and the receiving block 60 can be prevented from moving outward relative to the through hole 31 with the help of the edge plate 62. The receiving block 60 and the through hole 31 on the left end plate 30 are interference matched, and a firm and reliable relative fixed relationship can be established between the two, and the receiving block 60 can withstand a large external pulling force in the left and right directions, and it is not easy to separate from the left end plate 30.

[0061] Correspondingly, a latching tooth 711 is formed at the end of the U-shaped arm 71 and on the outer side surface, so that the outer side surface of the latching tooth 711 is formed into an inclined surface and the end portion is formed with a rounded corner. Figure 4 An elastic deformation zone 712 is formed at the root of the U-shaped arm 71, and the elastic deformation zone 712 can cause the two arm plates of the U-shaped arm 71 to produce elastic deformation from the root thereof, thereby causing the free ends of the two arm plates of the U-shaped arm 71 to move toward and away from each other, and move the latching tooth 711 in the front-rear direction.

[0062] In the process of gradually inserting the U-shaped arm 71 into the cavity 61, the wedge-shaped convex strip 63 will contact the outer side surface of the arm plate of the U-shaped arm 71 (that is, contact the outer side surface of the latch tooth 711), and can gradually compress the free end of the arm plate, causing the two arm plates of the U-shaped arm 71 to produce elastic deformation to make way, and continue to move / insert toward the inner end of the cavity 61, and finally cause the latch tooth 711 at the end of the arm plate to bypass the wedge-shaped convex strip 63 and correspond to the latch groove 64, so that the receiving block 60 and the connecting member 70 are connected as a whole, that is, the two plates 100 can be compactly connected into a whole in the transverse direction, and are not prone to lateral deviation.

[0063] In order to establish a more compact docking state between the receiving block 60 and the connecting member 70, in other words, between the left and right ends of the two plates 100, an elastic pad 65 is fixedly provided on the inner bottom surface of the cavity 61, and the elastic pad 65 has a certain thickness, generally in the range of 3mm to 10mm. When the U-shaped arm 71 on the connecting member 70 is fully inserted into the cavity 61, the end of the U-shaped arm 71 will compress the elastic pad 65 to undergo elastic deformation (producing deformation in the left and right directions), and the elastic pad 65 will exert a reverse elastic force on the U-shaped arm 71 or on the connecting member 70, so as to promote the relative profiles between the latch teeth 711 and the latch groove 64 to be in close contact, and promote the connecting member 70 to maintain a tightly plugged connection with the receiving block 60, and can generate a pulling force F between the two plates 100 that are docked on the left and right sides to promote the relative surfaces between the two to be close to each other, as shown in FIG. Fig. 9 If the material of the elastic pad 65 is relatively soft and has a certain fluidity, when the elastic pad 65 is elastically deformed, it may penetrate into the gap between the relative surfaces of the latch teeth 711 and the latch groove 64, thereby better ensuring the stability and reliability of the plug-in connection between the connector 70 and the receiving block 60.

[0064] In order to improve the docking quality between the left end plate 30 and the right end plate 40, that is, to improve the bonding quality between the left and right opposite surfaces of the two plates 100, so that the left and right opposite surfaces can fully contact and the gap is smaller. A coating is provided on the outer surface of the left end plate 30 and / or on the coating of the right end plate 40, and the coating can produce elastic deformation in the thickness direction, which can be called an elastic coating. The thickness (dimension in the left and right direction) of the elastic coating provided on the left end plate 30 and / or the right end plate 40 is generally in the range of 0.3mm to 2mm. The port of the cavity 61 of the receiving block 60 can be inwardly convergent relative to the outer surface of the elastic protrusion layer, that is, when the elastic coating is coated on the left end plate 30, it is still sufficient to make the outer end surface of the receiving block 60 (the port of the cavity 61) flush with the outer end surface of the left end plate 30 body.

[0065] like Figure 1 to Figure 2 , Figures 9 and 10 ,as well as Fig.14 As shown, the right end plate 40 and the connecting piece 70 are fixedly connected by nuts, and this connection method generally requires the connection between the connecting piece 70 and the right end plate 40 to be completed before pouring the slurry, which easily complicates the groove structure of the casting mold, increases production costs and process difficulty. Figure 3 to Figure 4 , Figure 11 to Figure 12 As shown, a threaded hole 41 (preferably a threaded countersunk hole) is pre-processed on the right end plate 40, and a screw body 72 is correspondingly formed on the connecting member 70, so that the connecting member 70 is fixedly connected to the threaded hole 41 through the matching of the screw body 72 and the threaded hole 41, but this connection structure will increase the complexity of fixing the connecting member 70 on the right end plate 40, affecting the efficiency of the masonry operation. To overcome this problem, see Fig.13 As shown, a groove part 1 43 and a plurality of groove parts 2 44 are formed on the outer wall surface of the right end plate 40, and the groove part 1 43 is located at the edge of the wall surface, and the groove part 2 44 is located inside the wall surface, and the groove part 1 43 and the plurality of groove parts 2 44 are distributed alternately along the front-back direction. A straight-line plug-in interface extending along the front-back direction is formed on the groove part 1 43. The groove part 2 44 is an L-shaped groove, and the long side end of the L-shaped groove is extended toward the end side of the groove part 2 44 away from the groove part 1 43, so that a straight-line plug-in interface with the same extension direction can be formed on both the groove part 1 43 and the groove part 2 44.

[0066] Correspondingly, the connector 70 is pre-fixed and distributed on the movable carrier plate 42 (assembled in advance in the workshop), or the connector 70 and the movable carrier plate 42 are integrally formed. A hook arm 1 421 that can be matched with the groove portion 1 43 is formed on the movable carrier plate 42, and a plurality of hook arms 2 422 that can be matched with the groove portion 2 44 are formed. The hook arm 1 421 can establish a plug-in fixed connection with the groove portion 1 43 along the front-to-back direction, and at the same time, the hook arm 2 422 can establish a plug-in fixed connection with the groove portion 2 44 along the front-to-back direction, and the movable carrier plate 42 is fixedly installed on the right end plate 40, that is, multiple connectors 70 can be quickly fixed on the right end plate 40 during masonry. The hook arm 1 421 is gradually inserted into the groove 1 43 from the rear side to the front side, and the hook arm 2 422 first extends into the rear side of the groove 2 44, and then moves toward the front side relative to the groove 2 44 to be inserted into the groove 2 44, as shown in FIG. Fig.13 .

[0067] In order to establish a stable and reliable connection between the two stacked plates 100, Figure 15 to Figure 16As shown, a tongue rod plug-in connection structure can be provided. To this end, the structure of the skeleton 200 involved in the above steps needs to be optimized, and multiple moving tube groups 80 and multiple fixed tube groups 90 are configured, as follows.

[0068] A plurality of convex columns 51 extending vertically upward and vertically downward are fixedly provided on the connecting rib 50, a movable pipe group 80 is fixedly provided on at least a portion of the plurality of convex columns 51 extending vertically upward, and a fixed pipe group 90 is fixedly provided on at least a portion of the plurality of convex columns 51 extending vertically downward, and the distribution position of the movable pipe group 80 is vertically opposite to the distribution position of the fixed pipe group 90.

[0069] When multiple layers of connecting ribs 50 are provided, a plurality of movable tube groups 80 are arranged only on a portion of the convex cylinder 51 of the connecting rib 50 located at the uppermost layer, and the axial centerline extension direction of each movable tube group 80 is in the vertical direction; a plurality of fixed tube groups 90 are arranged only on a portion of the convex cylinder 51 of the connecting rib 50 located at the lowermost layer, and the axial centerline extension direction of each fixed tube group 90 is in the vertical direction.

[0070] In order to better define the axial direction of each moving tube group 80 so that it remains in the vertical direction, and define the axial direction of each fixed tube group 90 so that it remains in the vertical direction, and make the distribution position of each moving tube group 80 and the distribution position of each fixed tube group 90 correspond to each other one by one to form a vertically facing relationship. Preferably, a mesh body 20 (or mesh plate) is respectively arranged above the connecting rib 50 located at the top layer and below the connecting rib 50 located at the bottom layer. A through hole channel with an axis along the vertical direction is formed on the mesh body 20. Both the moving tube group 80 and the fixed tube group 90 can pass through the through hole channel on the mesh body 20, and the outer wall of the moving tube group 80 (that is, the outer wall of the outer tube 81, which will be mentioned below) and the outer wall of the fixed tube group 90 are in contact with the inner wall of the corresponding through hole channel. With the help of the restraining effect of the mesh body 20, when pouring slurry into the mold groove / cavity of the mold, the axial direction of each movable pipe group 80 and the axial direction of each fixed pipe group 90 can be better suppressed from being significantly deviated relative to the vertical direction, which can better ensure that the axial direction of the movable pipe group 80 and the axial direction of the fixed pipe group 90 meet the (construction) verticality requirements.

[0071] The lower parts of the moving tube groups 80 are connected by pipe fittings, so that the spring-shaped capsule 832 provided on the inner end side of the outer tube 81 of the moving tube group 80 is connected, and the free end of the pipe fitting is led to the outside of the frame 200. The tongue rod 82 provided in the outer tube 81 is matched with the spring-shaped capsule 832, and the upper end of the tongue rod 82 is close to the sealing body (i.e., the sealing cap 85 shown in the figure) provided at the upper end of the outer tube 81. When the axis of the tongue rod 82 is along the vertical direction and driven by the spring-shaped capsule 832, the upper end of the tongue rod 82 can move vertically upward and pass through the sealing body, and then extend upward to the outside. The axis of the tube cavity of the fixed tube group 90 is extended in the vertical direction and the end of the tube cavity is downward. In order to prevent the slurry from entering the tube cavity of the fixed tube group 90 during pouring, a sealing film body 91 is provided at the lower end of the tube cavity of the fixed tube group 90.

[0072] The free end of the pipe connected to the spring-shaped capsule 832 is extended outside the mold, and the top surface of the sealing body provided at the upper end of the outer tube 81 is flush with the upper end of the mold groove (if the top surface of the sealing body provided at the upper end of the outer tube 81 extends upward relative to the mold groove end, the sealing body needs to be cut later to make its upper end flush with the upper end of the mold groove). The lower end of the fixed tube group 90 is placed against the bottom surface of the mold groove.

[0073] After the connecting pieces 70 and receiving blocks 60 on the same layer are plugged in and connected, that is, after the wall is built, a paste fluid is pumped into the spring-shaped bag 832 through the pipe connected to the spring-shaped bag 832 to cause the spring-shaped bag 832 to stretch upward in the vertical direction, to push the tongue rod 82 to move upward, to cause the upper end of the tongue rod 82 to pass through the seal at the upper end of the outer tube 81, and to be correspondingly inserted into the tube cavity of the fixed tube group 90 located directly above it, thereby completing the fixed connection between the multiple plates 100 stacked on each other in the vertical plane.

[0074] During implementation, multiple stress indentations may be provided on the upper part of the spring-shaped capsule 832, preferably, the multiple stress indentations are alternately distributed around the circumferential direction. In this way, multiple weak areas are formed on the wall of the spring-shaped capsule 832, and when the spring-shaped capsule 832 is fully stretched and the capsule wall is expanded to a certain extent, it is cracked at the stress indentations, so that the paste fluid pumped into the spring-shaped capsule 832 penetrates into the lumen of the outer tube 81, flows upward along the lumen of the outer tube 81, penetrates into the opposite surface between the two adjacent plates 100 above and below and the lumen of the fixed tube group 90, and wraps the upper part of the tongue rod 82 inserted in the lumen of the fixed tube group 90, so that the upper part of the tongue rod 82 and the lumen of the fixed tube group 90 are bonded as a whole.

[0075] After the upper part of the tongue bar 82 is fully inserted into the lumen of the fixed tube group 90, the lower part of the tongue bar 82 still maintains a matching state with the outer tube 81, that is, the lower part of the tongue bar 82 is always partially retained in the lumen of the outer tube 81. It should be noted that, in general, the outer diameter of the tongue plate 82 is required to be no larger than the inner diameter of the lumen of the fixed tube group 90, and the former is preferably smaller than the latter; however, when the stress indentation is provided on the wall of the spring-shaped capsule 832, the outer diameter of the tongue plate 82 is required to be smaller than the inner diameter of the lumen of the fixed tube group 90, and the diameter difference is preferably in the range of 2mm to 4mm, and should not exceed 8mm. In order to ensure that the tongue bar 82 can be smoothly inserted into the lumen of the fixed tube group 90, the upper end of the tongue bar 82 is formed into a tip 822, such as a conical section, a conical column end, etc. If a conical column end is selected, the small diameter end of the conical column end faces upward, and the outer diameter of the large diameter end of the conical column end is not greater than the outer diameter of the upper portion of the tongue rod 82 .

[0076] like Figure 15 to Figure 16 As shown, the lower part of the outer tube 81 is plug-connected with the convex cylinder 51 and there is an interference fit between the two. A plurality of radial bevel grooves 813 are formed on the outer wall of the outer tube 81, which are distributed alternately up and down, and the radial bevel grooves 813 extend downward from the outside to the inside. The radial bevel grooves 813 can be arc grooves extending in the circumferential direction, or can be annular grooves. After the radial bevel grooves 813 are provided, the bonding firmness between the moving tube group 80 or the outer tube 81 and the concrete body 10 can be increased.

[0077] The lower part of the spring-shaped capsule 832 is provided with a bottom block 831, and the two can be an integrally formed structure, forming a pusher 83. The bottom block 831 includes a connecting cavity 8311 connected to the capsule cavity of the spring-shaped capsule 832, and a grouting hole 8312 is provided on the connecting cavity 8311. The pusher 83 is plugged in the multi-step countersunk hole 811 of the outer tube 81, and the multi-step countersunk hole 811 can be understood as the tube cavity of the moving tube group 80. The spring-shaped capsule 832 is located on the upper part of the bottom block 831.

[0078] After being fixedly connected with the connecting rib 50, the port of the multi-step countersunk hole 811 faces upward. A plug hole connected to the inner bottom end of the multi-step countersunk hole 811 is formed at the lower part of the wall of the outer tube 81. The pipe connecting the spring-shaped capsule 832 is connected to the grouting hole 8312 on the bottom block 831 via the plug hole, so that the lumen of the pipe can be connected to the cavities of each spring-shaped capsule 832 (through the connecting cavity 8311), and the paste fluid can be pumped into the connecting cavity 8311 of the bottom block 831 and filled into the cavities of the spring-shaped capsule 832, so as to cause the spring-shaped capsule 832 to stretch and lengthen, and can push the tongue rod 82 upward relative to the outer tube 81 or the upper part of the multi-step countersunk hole 811 to move upward in the vertical direction, so as to achieve the purpose of pushing the upper end of the tongue rod 82 to the outside / above the upper end of the outer tube 81.

[0079] The lower part of the tongue rod 82 is inserted into the spring-shaped capsule 832, that is, the spring-shaped capsule 832 is annular and the upper part is formed as a circular hole, and the outer wall of the lower part of the tongue rod 82 is in contact with the inner wall of the spring-shaped capsule 832. In order to enable the tongue rod 82 to move substantially in the vertical direction relative to the outer tube 81, a radial flange 821 is formed in the middle of the tongue rod 82. The side wall of the radial flange 821 contacts and matches the inner wall of the tube cavity at the upper part of the multi-step counterbore 811. The radial flange 821 can be annular and the lower part can be formed as a conical surface 812 with a small end facing downward, so that the middle part of the tongue rod 82 is in full contact with the upper end of the spring-shaped capsule 832 and the thrust can be evenly distributed.

[0080] The sealing body disposed on the upper part of the moving tube group 80 may be a sealing film (refer to the sealing film body 91 of the lumen port of the fixed tube group 90). The sealing body disposed on the upper part of the moving tube group 80 may also include: Fig.16 The plug ring 84 and the sealing cap 85 are shown. The plug ring 84 is fixed at the upper end of the multi-step counterbore 811 of the outer tube 81, and forms an interference fit with the outer tube 81 to ensure that the two are firmly plugged into one body. At the same time, the plug ring 84 can also prevent the radial flange 821 of the tongue rod 82 from escaping from the upper end of the outer tube 81. The sealing cap 85 is inserted into the annular cavity of the plug ring 84, and the upper end of the tube cavity of the moving tube group 80 or the upper end of the outer tube 81 is blocked by the top wall 851 of the sealing cap 85, so that the top end (tip 822) of the tongue rod 82 is hidden in the outer tube 81. The upper end surface of the top wall 851 of the sealing cap 85 can be flush with the upper end of the groove on the mold, or it can extend upward / outward relative to the upper end of the groove on the mold. During the masonry operation, the sealing cap 85 can be removed from the moving pipe assembly 80 in advance. It is preferred that the top wall 851 is designed to be thin and the tip 822 can pierce the top wall 851 of the sealing cap 85 and extend to the upper part of the outer tube 81.

[0081] The left end plate 30 and the right end plate 40 can be solid plates or hollow plates. The mesh body 20 shown in the figure is only a schematic style, and the mesh distribution requirements thereon are corresponding to the distribution positions of the moving pipe group 80 and the fixed pipe group 90. During the casting process, a plurality of supporting feet are provided on the front, rear, left and right sides of the mesh body 20, so that the supporting feet on the mesh body 20 can contact the inner wall surface of the groove on the mold, and release the inner end surface of the left end plate 30 and contact the inner end surface of the right end plate 40, so as to facilitate the mesh body 20 to be fixed in the groove of the mold. The supporting feet are preferably elastic supporting feet, that is, the supporting feet can produce slight elastic deformation in the left and right directions or the front and back directions in the plane, so as to ensure that the mesh body 20 can be firmly fixed in the groove of the mold without hindering demoulding.

[0082] The left end plate 30 may be provided with a plurality of connectors 70 at the same time. Similarly, the right end plate 40 may be provided with a plurality of receiving blocks 60 at the same time. Fig.14 The connecting piece 70 on the left end plate 30 can be plugged and connected with the receiving block 60 on the right end plate 40 , and at the same time, the receiving block 60 on the left end plate 30 can be plugged and connected with the connecting piece 70 on the right end plate 40 .

[0083] The spring-shaped capsule 832 is preferably made of an elastic material with water permeability so that the paste fluid injected into the spring-shaped capsule 832 can harden; or the paste fluid used is a paste that can be oxidatively hardened.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An autoclaved lightweight concrete board, comprising a concrete body (10) and a skeleton (200); the concrete body (10) comprises the following ingredients in parts by weight: 30 to 45 parts of cement, 10 to 25 parts of lime, 5 to 8 parts of fly ash, and 0.5 to 2.5 parts of aluminum-containing slag; the characteristics are: The concrete body (10) further comprises the following ingredients in parts by weight: 1 to 2.5 parts of steel fiber and 0.5 to 3.5 parts of expanded clay; the skeleton (200) comprises a left end plate (30), a right end plate (40), a plurality of connecting bars (50), a plurality of receiving blocks (60), and a plurality of connecting members (70); The receiving blocks (60) are respectively fixedly installed in a plurality of through holes (31) opened on the left end plate (30), so that the outer end surface of the receiving block (60) is flush with the outer end surface of the left end plate (30) and the port of the cavity (61) formed on the outer end surface of the receiving block (60) faces outward; A slot structure is formed on the right end plate (40) so as to be opposite to the distribution position of each receiving block (60) on the left and right, and the port of the slot structure is oriented outward; the connecting pieces (70) are fixedly mounted on the slot structure of the right end plate (40), so that the U-shaped arm (71) formed on the free end side of the connecting piece (70) protrudes outward relative to the outer end surface of the right end plate (40); The left end plate (30) and the right end plate (40) are connected into a whole by using a plurality of connecting ribs (50); so that the U-shaped arm (71) on the connecting member (70) can establish a plug-in connection relationship with the cavity (61) on the receiving block (60).

2. The autoclaved lightweight concrete board according to claim 1, characterized in that: In parts by weight, the steel fiber is 1.3 to 2.0 parts, and the expanded clay is 0.5 to 1.3 parts.

3. The autoclaved lightweight concrete board according to claim 1 or 2, characterized in that: A radially extending edge plate (62) is formed on the outer wall of the receiving block (60) and near the closed end side; two front and rear opposite wedge-shaped convex strips (63) are formed on the inner wall of the cavity (61) and near the inner bottom, so that the protruding ends of the wedge-shaped convex strips (63) are relatively close to the inner bottom surface of the cavity (61), so that a groove (64) can be formed inside the cavity (61); the receiving block (60) is interference-matched with the through hole (31) on the left end plate (30), and the edge plate (62) is in contact with the inner wall of the left end plate (30) located outside the inner end of the through hole (31); Clamping teeth (711) are formed at the ends of the two arm plates of the U-shaped arm (71) and on the outer sides of the arm plates, and an elastic deformation zone (712) is formed at the root of the arm plates; the elastic deformation zone (712) can cause the two arm plates of the U-shaped arm (71) to produce elastic deformation from the root, thereby enabling the free ends of the arm plates to move toward and away from each other; When the U-shaped arm (71) is inserted into the mold cavity (61), the wedge-surface convex strip (63) can contact the outer side surface of the latching tooth (711) and force the two arm plates to produce elastic deformation, so that the latching tooth (711) can bypass the wedge-surface convex strip (63) and establish a surface contact matching connection relationship with the latching groove (64).

4. The autoclaved lightweight concrete board according to claim 3 is characterized by: An elastic pad (65) is fixedly provided on the inner bottom surface of the cavity (61); after the U-shaped arm (71) is inserted into the cavity (61) and the latching tooth (711) matches the latching groove (64), the free end of the latching tooth (711) can remain in a state of being embedded in the elastic pad (65).

5. The autoclaved lightweight concrete board according to claim 1 or 2, characterized in that: A coating is applied on the outer end surface of the left end plate (30) and / or on the outer end surface of the right end plate (40), and the coating is capable of elastic deformation in the left-right direction.

6. The autoclaved lightweight concrete board according to claim 1 or 2, characterized in that: The slotted hole structure on the right end plate (40) is a threaded hole (41); a screw body (72) matching the threaded hole (41) is formed on the connecting piece (70) to fix the connecting piece (70) on the right end plate (40).

7. The autoclaved lightweight concrete board according to claim 1 or 2, characterized in that: The slot hole structure on the right end plate (40) includes a slot part 1 (43) and a plurality of slot parts 2 (44) formed on the outer end wall surface thereof, and the slot part 1 (43) is located at the edge of the wall surface, and the slot part 2 (44) is located inside the wall surface; the slot part 1 (43) and the plurality of slot parts 2 (44) are arranged alternately in the front and rear direction; a straight-line plug-in interface extending in the front-rear direction is formed on the slot part 1 (43); the slot part 2 (44) is an L-shaped slot, and the long side end of the L-shaped slot is extended toward the end side of the slot part 2 (44) away from the slot part 1 (43), so that a straight-line plug-in interface with the same extension direction can be formed on the slot part 1 (43) and the slot part 2 (44); The connecting member (70) is fixedly mounted on the movable carrier plate (42); a hook arm 1 (421) that can be matched with the groove portion 1 (43) is formed on the movable carrier plate (42), and a plurality of hook arms 2 (422) that can be matched with the groove portion 2 (44) are formed; the hook arm 1 (421) can establish a plug-in fixed connection with the groove portion 1 (43), and the hook arm 2 (422) can establish a plug-in fixed connection with the groove portion 2 (44), respectively, so that the movable carrier plate (42) is fixedly mounted on the right end plate (40).

8. The autoclaved lightweight concrete board according to claim 1 or 2, characterized in that: Multiple layers of connecting ribs (50) are arranged alternately in the vertical direction, so that the multiple connecting ribs (50) contained in each layer are distributed alternately front to back; the height position of the connecting ribs (50) of the uppermost layer is lower than the upper end surface of the left end plate (30) and the upper end surface of the right end plate (40), and the height position of the connecting ribs (50) of the lowermost layer is higher than the lower end surface of the left end plate (30) and the lower end surface of the right end plate (40).

9. The autoclaved lightweight concrete board according to claim 8, characterized in that: A plurality of convex columns (51) extending vertically upward and downward are formed on the connecting rib (50); a movable pipe group (80) is fixedly provided on at least a portion of the convex columns (51) extending upward, and a fixed pipe group (90) is fixedly provided on at least a portion of the convex columns (51) extending downward, and the distribution position of the movable pipe group (80) is vertically opposite to the distribution position of the fixed pipe group (90); The movable tube assembly (80) comprises an outer tube (81), a tongue rod (82) and a push portion (83) disposed in a multi-step countersunk hole (811) formed at the upper portion of the outer tube (81); the push portion (83) comprises a bottom block (831) and a spring-shaped capsule (832); the lower portion of the outer tube (81) is fixedly connected to the convex column (51); the upper portion of the fixed tube assembly (90) is fixedly connected to the convex column (51); the outer tube (81) and the fixed tube assembly (90) are respectively maintained in a state of extending vertically upward and downward; The lower part of the spring-shaped capsule (832) is fixedly connected to the bottom block (831) and the communicating cavity (8311) of the bottom block (831) is communicated with the cavity of the spring-shaped capsule (832); a radial flange (821) is formed in the middle of the tongue rod (82) and after the lower part of the tongue rod (82) is inserted into the upper end of the spring-shaped capsule (832), the radial flange (821) contacts the upper end surface of the spring-shaped capsule (832); the upper part of the tongue rod (82) corresponds to the upper cavity of the multi-step counterbore (811) and the tongue rod (82) can move in the vertical direction relative to the outer tube (81); a grouting hole (8312) is formed on the wall of the communicating cavity (8311) and the grouting holes (8312) of the plurality of pushing parts (83) are communicated with each other by a pipe fitting.

10. The autoclaved lightweight concrete board according to claim 9, characterized in that: The skeleton (200) further comprises two mesh bodies (20), one mesh body (20) matching each movable tube group (80) arranged above the connecting rib (50), and the other mesh body (20) matching each fixed tube group (90) arranged below the connecting rib (50); a through hole channel with an axis along a vertical direction is formed on the mesh body (20); the movable tube group (80) and the fixed tube group (90) can both pass through the through hole channel on the mesh body (20), and the outer wall of the movable tube group (80) and the outer wall of the fixed tube group (90) are respectively in contact with the inner wall of each through hole channel.

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