A thermal insulation structure for building exterior walls and its construction method

Abstract

The present invention relates to the technical field of building exterior wall thermal insulation, and discloses a building exterior wall thermal insulation structure, which includes an adhesive layer, a polystyrene board, a plastering mortar, a fiberglass mesh, and a surface coating layer. At the center position of the polystyrene board, one end of an insertion column is embedded in the polystyrene board. A threaded groove is provided at the end face of the insertion column located outside the polystyrene board. At one end of the insertion column located outside the polystyrene board, a threaded shaft is provided which passes through the fiberglass mesh and is threadedly connected in the threaded groove. At the end of the threaded shaft away from the insertion column, a pressure plate is provided which fits on the outer wall of the fiberglass mesh. A positioning ring is provided on the circumferential side of the insertion column near one end of the threaded groove, which fits on the outer wall of the polystyrene board. By using the threaded shaft to support the fiberglass mesh laid in the plastering mortar, the possibility of the fiberglass mesh shifting in position during the laying process is reduced, and finally it is beneficial to the stable laying of the fiberglass mesh on the plastering mortar.

Description

Technical Field

[0001] The present invention belongs to the technical field of building exterior wall insulation, and particularly relates to a building exterior wall heat insulation structure and a construction method thereof. Background Art

[0002] In buildings, the heat loss of the exterior wall enclosure structure is relatively large, and the wall is the main component of the exterior enclosure structure. According to the principle of value engineering, developing exterior wall insulation technology has become an important link in realizing building energy conservation. It can not only save a large amount of energy, but also provide a comfortable environment for residents and bring many benefits.

[0003] At present, Chinese Patent No. CN107237409A, with a publication date of October 10, 2017, discloses a construction method for exterior wall thermal insulation coatings, including the following steps: (1) substrate treatment, (2) line snapping, (3) pasting insulation boards, (4) applying surface mortar, (5) laying and pressing fiberglass mesh, (6) applying surface mortar, (7) filling and caulking. This construction method for exterior wall thermal insulation coatings first pastes insulation boards, then applies surface mortar and lays and presses fiberglass mesh, and finally applies the second coat of surface mortar. While ensuring the exterior wall insulation performance, it improves the tensile strength of the exterior wall thermal insulation coating and prevents the coating from cracking and peeling.

[0004] Among them, after applying the surface mortar, the alkali-resistant fiberglass mesh is immediately tightened horizontally, and the trowel is used to smooth and press the mesh into the wet surface mortar from the middle to the upper and lower sides; however, affected by the self-gravity of the fiberglass mesh, when laying and pressing the fiberglass mesh on the surface mortar, the fiberglass mesh is prone to shift in position during the laying and pressing process, which is not conducive to the stable bonding of the fiberglass mesh on the surface mortar. Summary of the Invention

[0005] The purpose of the present invention is to provide a building exterior wall heat insulation structure, which is conducive to the stable laying and pressing of the fiberglass mesh on the surface mortar.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A building exterior wall heat insulation structure includes an adhesive layer coated on the base wall surface, a polystyrene board pasted outside the adhesive layer, a surface mortar coated on the outer wall of the polystyrene board, a fiberglass mesh laid and pressed in the surface mortar, and a surface coating layer coated on the outside of the surface mortar. At the center position of the polystyrene board, there is an insertion post embedded in one end of the polystyrene board. A threaded groove is provided at the end face of the insertion post located outside the polystyrene board. At the end of the insertion post located outside the polystyrene board, there is a threaded shaft that passes through the fiberglass mesh and is threadedly connected to the threaded groove. A pressure plate that fits against the outer wall of the fiberglass mesh is provided at the end of the threaded shaft away from the insertion post. A positioning ring that fits against the outer wall of the polystyrene board is provided on the peripheral side of the insertion post near the threaded groove.

[0007] By adopting the above technical solution, after the polystyrene board is pasted, the insertion post can be inserted into the central position of the polystyrene board, and the positioning ring of the insertion post fits on the outer wall of the polystyrene board; when the fiberglass mesh is pressed in the rendering mortar, the threaded shaft passes through the fiberglass mesh and is threadedly connected in the threaded groove, and at the same time, the pressing disc at the end of the threaded shaft fits on the outer wall of the fiberglass mesh. By rotating the pressing disc, the fiberglass mesh can be driven to be pressed in the rendering mortar, and the fiberglass mesh pressed in the rendering mortar can also be supported by the threaded shaft, reducing the possibility of the fiberglass mesh shifting in position during the pressing process, and finally facilitating the stable pressing of the fiberglass mesh on the rendering mortar.

[0008] The further setting of the present invention is that: a plastic barrier film covering the threaded groove is provided at the end face of the outer end of the insertion post located outside the polystyrene board, and the end of the threaded shaft away from the pressing disc is sharp.

[0009] By adopting the above technical solution, the insertion post uses the plastic barrier film to block the threaded groove, thereby preventing the rendering mortar from entering the threaded groove during the process of coating the outer wall of the polystyrene board.

[0010] The purpose of the present invention also lies in providing a construction method for a building exterior wall thermal insulation structure, which increases the bonding force between the rendering mortar and the polystyrene board by increasing the surface roughness of the polystyrene board.

[0011] The above technical purpose of the present invention is achieved through the following technical solutions: a construction method for a building exterior wall thermal insulation structure, including the following steps:

[0012] S1 Substrate wall cleaning: Before construction, it is first necessary to clean the substrate wall, including removing dust, oil stains, loose coatings, etc. on the wall to ensure that the wall is clean and flat;

[0013] S2 Measuring, setting out lines, and hanging reference lines: According to the design requirements, measure the wall surface to determine the size and position of the polystyrene board, then set out lines, mark the installation position of the polystyrene board on the wall surface, and hang the horizontal reference line to ensure the horizontal installation of the polystyrene board;

[0014] S3 Pasting or anchoring the polystyrene board: According to the marked lines, cut the polystyrene board into appropriate sizes, and then use polymer mortar or special polystyrene board adhesive to paste or anchor the polystyrene board on the substrate wall; ensure firm bonding between the polystyrene board and the wall surface; at the same time, embed the insertion post in the central position of the polystyrene board and the positioning ring fits on the outer wall of the polystyrene board;

[0015] S4 Scoring the surface of the polystyrene board: After the polystyrene board is fixed, use a scoring device to score the surface of the polystyrene board to increase the surface roughness of the polystyrene board, thereby increasing the bonding force between the rendering mortar and the polystyrene board;

[0016] S5 Apply a thin layer of plastering mortar: Apply a thin layer of plastering mortar on the surface of the polystyrene board, with a thickness generally of 3 - 5 mm. Use a spatula to evenly apply the plastering mortar on the surface of the polystyrene board to ensure firm adhesion between the plastering mortar and the polystyrene board;

[0017] S6 Lay and press the fiberglass mesh: Before the plastering mortar is completely dry, attach the fiberglass mesh to the surface of the plastering mortar. Among them, use a threaded shaft to pass through the fiberglass mesh and then thread - connect it into the threaded groove of the plug post, and the pressure plate fits on the fiberglass mesh. Then use a spatula to gently press the surface of the fiberglass mesh to ensure the degree of fit and firm adhesion between the fiberglass mesh and the wall surface;

[0018] S7 Detail treatment and additional application of fiberglass mesh: Treat the detail parts on the wall surface, such as windows, doorways, etc., to ensure a flat surface; It should be noted that at protruding parts or corners, an additional layer of fiberglass mesh can be applied to increase the overall crack - resistance of the wall;

[0019] S8 Level the plastering mortar for the finishing layer: After the bottom - layer plastering mortar is fully dry, carry out the construction of the finishing layer; Use a trowel to evenly apply the plastering mortar on the dry bottom - layer plastering mortar. Through multiple troweling, compaction, and leveling, make the wall surface reach a smooth and flat effect;

[0020] S9 Construction of the surface coating layer: After the plastering mortar for the finishing layer is dry, carry out the construction of the surface coating layer; According to the design requirements, select a suitable exterior wall coating for brushing or spraying to make the exterior wall surface have an aesthetic decorative effect and increase the waterproof and weather - resistant performance of the wall;

[0021] S10 Acceptance: After the construction is completed, carry out the acceptance of the project; Check whether the flatness of the wall surface, the appearance effect, the adhesion of the coating layer, and the overall quality meet the requirements; Only after ensuring that the construction quality is qualified can the construction be ended.

[0022] By adopting the above - mentioned technical solution, after the polystyrene board is fixed, use a surface - roughening device to roughen the surface of the polystyrene board, thereby increasing the surface roughness of the polystyrene board and increasing the adhesion between the plastering mortar and the polystyrene board.

[0023] A further setting of the present invention is that: the surface - roughening device includes a handle column, a connecting rod arranged at one end of the handle column, a base arranged at the end of the connecting rod far from the handle column, a positioning groove opened at the end of the base far from the connecting rod for the end of the plug post to be embedded, connecting arms arranged on both sides of the base, and steel wire brush strips arranged on the lower side of the connecting arms and used for fitting on the outer wall of the polystyrene board.

[0024] By adopting the above technical solution, the construction worker holds the handle column, and then inserts the end of the insertion column into the positioning groove on the base. At this time, the insertion column can position the position of the base on the polystyrene board. Then, by rotating the handle column, the connecting arm can be driven to rotate. As the connecting arm rotates, the wire brush strip that abuts against the outer wall of the polystyrene board can scrape the outer wall of the polystyrene board, thereby increasing the surface roughness of the polystyrene board, and finally increasing the bonding force between the plastering mortar and the polystyrene board.

[0025] A further setting of the present invention is that: a cavity layer is provided inside the handle column, a first connection ring is provided on the upper inner wall of the cavity layer, a plurality of first guiding teeth are provided on the periphery of the first connection ring, a second connection ring is provided on the lower inner wall of the cavity layer, a plurality of second guiding teeth that are offset from the first guiding teeth are provided on the periphery of the second connection ring, a guiding channel is formed between the first guiding teeth and the second guiding teeth, a through hole communicating with the cavity layer is provided on the lower end surface of the handle column, a lifting column is provided at the lower end of the handle column, the upper end of the lifting column passes through the through hole and the lower end is connected to the end of the connecting rod, guide columns are provided on both sides of the lifting column away from the connecting rod end and are embedded in the guiding channel, a push plate that is located inside the first connection ring and abuts against the upper end surface of the lifting column is provided on the upper inner wall of the cavity layer, and a return spring whose upper end is connected to the upper inner wall of the cavity layer and whose lower end is connected to the center of the push plate is provided inside the cavity layer.

[0026] By adopting the above technical solution, when the construction worker needs to drive the connecting arm to rotate, the construction worker holds the handle column and then presses down the handle column. At this time, the lifting column can move towards the inside of the handle column, and the return spring is compressed. Among them, a plurality of first guiding teeth on the first connection ring and a plurality of second guiding teeth on the second connection ring are used, and the plurality of first guiding teeth and the plurality of second guiding teeth are distributed in a staggered manner. As the lifting column moves upward in the cavity layer, the guide columns on the lifting column can move upward and abut against the first guiding teeth and move along the inclined surface of the first guiding teeth; at the same time, when the construction worker cancels the downward pressure, under the elastic restoring force of the return spring, the lifting column can move downward in the cavity layer, and the guide columns on the lifting column can move downward and abut against the second guiding teeth and move along the inclined surface of the second guiding teeth; among them, the movement of the guide columns on the lifting column along the inclined surfaces of the first guiding teeth and the second guiding teeth can drive the lifting column to rotate. Finally, as the construction worker presses down again and again, the lifting column can continuously rotate, thereby driving the rotation of the connecting arm, and the wire brush strip that abuts against the outer wall of the polystyrene board can scrape the outer wall of the polystyrene board;

[0027] Among them, when the construction worker presses down the handle column, a part of the downward pressure will also act on the connecting arm, thereby driving the wire brush strip on the connecting arm to press tightly against the outer wall of the polystyrene board, and finally it is beneficial for the wire brush strip to efficiently scrape the outer wall of the polystyrene board.

[0028] A further setting of the present invention is that: on the outer wall of the base around the positioning groove, a plurality of spherical grooves with a cross-sectional contour line in the shape of a superior arc are provided, and ball bearings for abutting against the positioning ring are embedded in the spherical grooves.

[0029] By adopting the above technical solution, when the insertion column end is embedded in the positioning groove of the base, the ball bearings on the periphery of the base can abut and support on the positioning ring. At this time, when the base rotates, rolling friction can be formed between the base and the positioning ring. Compared with sliding friction, the frictional force of rolling friction is relatively small. Therefore, it is beneficial for the base to rotate smoothly, and finally it is convenient for the wire brush strip to smoothly scratch the outer wall of the polystyrene board.

[0030] A further setting of the present invention is that: on the upper side of the base, a fixed sleeve for the two connecting arms to slide is provided. On the upper side of the fixed sleeve, a toothed hole for the connecting rod to pass through and connect with the inner wall of the fixed sleeve is provided. A toothed sliding sleeve for being embedded in the toothed hole and cooperating with the toothed hole is sleeved on the connecting rod. Tooth grooves for the outer teeth of the toothed sliding sleeve to engage are provided on the side wall of the connecting arm.

[0031] By adopting the above technical solution, when the size of the polystyrene board changes, move the toothed sliding sleeve upward along the connecting rod so that the toothed sliding sleeve is separated from the tooth groove on the connecting arm. At this time, the two connecting arms can be moved on the fixed sleeve so that the two connecting arms move away from or close to each other, so that the length of the connecting arm adapts to the size of the polystyrene board. Then move the toothed sliding sleeve downward along the connecting rod so that the toothed sliding sleeve engages with the tooth groove on the connecting arm again, thereby completing the position positioning of the movement of the connecting arm, and finally the length of the connecting arm can be adjusted according to the size of the polystyrene board.

[0032] A further setting of the present invention is that: on the side of the connecting arm away from the tooth groove, a dovetail sliding rod with an extending direction parallel to the extending direction of the connecting arm is provided. Dovetail sliding grooves for the dovetail sliding rod to pass through are provided on the inner walls of both sides of the fixed sleeve.

[0033] By adopting the above technical solution, the connecting arm is embedded in the dovetail sliding groove on the inner wall of the fixed sleeve by the dovetail sliding rod. At this time, it is beneficial for the connecting arm to stably slide and connect in the fixed sleeve.

[0034] A further setting of the present invention is that: a connecting spring with an upper end connected to the lifting column and a lower end connected to the toothed sliding sleeve is sleeved on the connecting rod.

[0035] By adopting the above technical solution, the upper end of the connecting spring is connected to the lifting column and the lower end is connected to the toothed sliding sleeve. The elastic restoring force of the connecting spring can ensure that the toothed sliding sleeve stably engages with the tooth groove on the connecting arm.

[0036] The beneficial effects of the present invention are as follows: After the polystyrene board is fixed, a sweeping device is used to perform a sweeping treatment on the surface of the polystyrene board. During this process, the construction worker holds the handle column, and then inserts the end of the insertion column into the positioning groove on the base. At this time, the insertion column can position the base on the polystyrene board. Subsequently, the construction worker holds the handle column and then presses down the handle column. At this time, the lifting column can move towards the inside of the handle column, and the return spring is compressed. By using multiple first guiding teeth on the first connecting ring and multiple second guiding teeth on the second connecting ring, and the multiple first guiding teeth and multiple second guiding teeth are distributed in a staggered manner. As the lifting column moves upward in the cavity layer, the guiding column on the lifting column can move upward and then abut against the first guiding teeth and move along the inclined surface of the first guiding teeth. At the same time, when the construction worker cancels the downward pressure, under the elastic restoring force of the return spring, the lifting column can move downward in the cavity layer, and the guiding column on the lifting column can move downward and then abut against the second guiding teeth and move along the inclined surface of the second guiding teeth. The movement of the guiding column on the lifting column along the inclined surfaces of the first guiding teeth and the second guiding teeth can drive the lifting column to rotate. Eventually, with the construction worker pressing down again and again, the lifting column can continuously rotate, thereby driving the rotation of the connecting arm, and the wire brush strip abutting against the outer wall of the polystyrene board can scrape the outer wall of the polystyrene board, thereby increasing the surface roughness of the polystyrene board, and finally increasing the bonding force between the plastering mortar and the polystyrene board. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 is a sectional view of the layer relationship structure among the adhesive layer, polystyrene board, plastering mortar, fiberglass mesh, and surface coating layer in the present invention;

[0039] Figure 2 is a schematic diagram of the connection relationship among the sweeping device, polystyrene board, and insertion column in the present invention. At this time, the sweeping device is in a separated state from the polystyrene board;

[0040] Figure 3 is a sectional view of the structure of the sweeping device in the present invention;

[0041] Figure 4 is a partial sectional view of the sweeping device in the present invention, mainly used to show the structure inside the handle column;

[0042] Figure 5 is a schematic diagram of the structure of the sweeping device in the present invention. At this time, the connecting arm is in a separated state from the fixed sleeve.

[0043] In the figure, 101 is the adhesive layer; 102 is the polystyrene board; 103 is the rendering mortar; 104 is the fiberglass mesh; 105 is the surface coating layer; 2 is the insertion post; 21 is the thread groove; 22 is the threaded shaft; 221 is the pressure plate; 23 is the positioning ring; 24 is the plastic barrier film; 3 is the roughening device; 31 is the handle post; 311 is the cavity layer; 312 is the first connecting ring; 3121 is the first guiding tooth; 313 is the second connecting ring; 3131 is the second guiding tooth; 314 is the guiding channel; 315 is the through hole; 316 is the push plate; 317 is the return spring; 32 is the connecting rod; 321 is the toothed sliding sleeve; 322 is the connecting spring; 33 is the base; 331 is the spherical groove; 332 is the ball; 34 is the positioning groove; 35 is the connecting arm; 351 is the tooth groove; 352 is the dovetail sliding rod; 36 is the steel wire brush strip; 4 is the lifting post; 41 is the guide post; 5 is the fixing sleeve; 51 is the toothed hole; 52 is the dovetail sliding groove. Detailed implementation manners

[0044] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] A thermal insulation structure for building exterior walls, referring to Figure 1 、 Figure 2 ,this thermal insulation structure for building exterior walls includes an adhesive layer 101, a polystyrene board 102, a rendering mortar 103, a fiberglass mesh 104, and a surface coating layer 105. Among them, the adhesive layer 101 is coated on the base wall surface, the polystyrene board 102 is bonded outside the adhesive layer 101, the rendering mortar 103 is coated on the outer wall of the polystyrene board 102, the fiberglass mesh 104 is laid and pressed in the rendering mortar 103, and the surface coating layer 105 is coated outside the rendering mortar 103. At the same time, at the center position of the polystyrene board 102, one end of an insertion post 2 is embedded in the polystyrene board 102, and a thread groove 21 is provided at the end face of the insertion post 2 outside the polystyrene board 102. A plastic barrier film 24 covering the thread groove 21 is bonded at the end face of the insertion post 2 outside the polystyrene board 102.

[0046] Referring to Figure 1 、 Figure 2, at one end of the inserting post 2 located outside the polystyrene board 102, there is a threaded shaft 22 that passes through the fiberglass mesh 104 and is threadedly connected in the threaded groove 21. At one end of the threaded shaft 22 away from the inserting post 2, there is a pressing plate 221 welded to fit on the outer wall of the fiberglass mesh 104. Wherein, a positioning ring 23 that fits on the outer wall of the polystyrene board 102 is arranged on the circumferential side of the inserting post 2 near one end of the threaded groove 21. At the same time, one end of the threaded shaft 22 away from the pressing plate 221 is sharp, and the sharp end of the threaded shaft 22 can conveniently pierce the plastic barrier film 24.

[0047] Principle: After pasting the polystyrene board 102, the inserting post 2 can be inserted into the central position of the polystyrene board 102, and the positioning ring 23 of the inserting post 2 fits on the outer wall of the polystyrene board 102. When the fiberglass mesh 104 is laid and pressed in the plastering mortar 103, the threaded shaft 22 passes through the fiberglass mesh 104 and is threadedly connected in the threaded groove 21. At the same time, the pressing plate 221 at the end of the threaded shaft 22 fits on the outer wall of the fiberglass mesh 104. By rotating the pressing plate 221, the fiberglass mesh 104 can be driven to be laid and pressed in the plastering mortar 103. And the fiberglass mesh 104 laid and pressed in the plastering mortar 103 can also be supported by the threaded shaft 22, reducing the possibility of the fiberglass mesh 104 shifting in position during the laying and pressing process, and finally being beneficial to the stable laying and pressing of the fiberglass mesh on the plastering mortar.

[0048] A construction method for a building exterior wall thermal insulation structure includes the following steps:

[0049] S1 Cleaning of the base wall: Before construction, it is first necessary to clean the base wall, including removing dust, oil stains, loose coatings, etc. on the wall to ensure that the wall is clean and flat;

[0050] S2 Measuring, setting out lines, and hanging reference lines: According to the design requirements, measure the wall surface to determine the size and position of the polystyrene board, then set out lines, mark the installation position of the polystyrene board on the wall surface, and hang the horizontal reference line to ensure the horizontal installation of the polystyrene board;

[0051] S3 Pasting or anchoring the polystyrene board: According to the marked lines set out, cut the polystyrene board into appropriate sizes, and then use polymer mortar or special polystyrene board adhesives to paste or anchor the polystyrene board on the base wall; ensure firm bonding between the polystyrene board and the wall surface; at the same time, embed the inserting post in the central position of the polystyrene board and the positioning ring fits on the outer wall of the polystyrene board;

[0052] S4 Scoring the surface of the polystyrene board: After the polystyrene board is fixed, use the scoring device 3 to score the surface of the polystyrene board to increase the surface roughness of the polystyrene board, thereby increasing the bonding force between the plastering mortar and the polystyrene board;

[0053] S5 Apply a thin layer of rendering mortar: Apply a thin layer of rendering mortar on the surface of the polystyrene board, with a thickness of generally 3 - 5 mm. Use a spatula to evenly apply the rendering mortar on the surface of the polystyrene board to ensure a firm bond between the rendering mortar and the polystyrene board;

[0054] S6 Lay and press the fiberglass mesh: Before the rendering mortar is completely dry, attach the fiberglass mesh to the surface of the rendering mortar. Among them, use a threaded shaft to pass through the fiberglass mesh and then thread it into the threaded groove of the plug post, and the pressure plate is attached to the fiberglass mesh. Then, use a spatula to gently press the surface of the fiberglass mesh to ensure the degree of fit and firm bond between the fiberglass mesh and the wall surface;

[0055] S7 Detail treatment and additional fiberglass mesh pasting: Treat the details on the wall surface, such as windows, doorways, etc., to ensure a flat surface; it should be noted that on protruding parts or corners, an additional layer of fiberglass mesh can be pasted to increase the overall crack resistance of the wall;

[0056] S8 Level the rendering mortar for the finishing layer: After the base rendering mortar is fully dry, carry out the construction of the finishing layer; use a trowel to evenly apply the rendering mortar on the dry base rendering mortar, and through multiple troweling, compaction, and leveling, make the wall surface reach a smooth and flat effect;

[0057] S9 Construction of the surface coating layer: After the rendering mortar for the finishing layer is dry, carry out the construction of the surface coating layer; according to the design requirements, select a suitable exterior wall coating for brushing or spraying to make the exterior wall surface have an aesthetic decorative effect and increase the waterproof and weather resistance of the wall;

[0058] S10 Acceptance: After the construction is completed, carry out the acceptance of the project; check whether the flatness of the wall surface, the appearance effect, the adhesion of the coating, and the overall quality meet the requirements; only after ensuring that the construction quality is qualified can the construction be ended.

[0059] Refer to Figure 2 、 Figure 3, in the surface roughening of the polystyrene board in step S4, this roughening device 3 includes a handle column 31, a connecting rod 32, a base 33, a positioning groove 34, a connecting arm 35, and a steel wire brush strip 36; among them, the handle column 31 is for construction workers to hold by hand, the connecting rod 32 is arranged at one end of the handle column 31, at the same time the base 33 is fixed at the end of the connecting rod 32 away from the handle column 31, and the positioning groove 34 is opened at the end of the base 33 away from the connecting rod 32 and for the end of the insertion post 2 to be embedded, and the central axis of the positioning groove 34 coincides with the central axis of the connecting rod 32; among them, the connecting arms 35 are arranged on both sides of the base 33, and the steel wire brush strips 36 are adhesively fixed on the lower side of the connecting arms 35 and used for fitting on the outer wall of the polystyrene board 102; at the same time, a plurality of spherical grooves 331 with a cross-sectional contour line in the shape of a superior arc are opened on the outer wall of the base 33 around the positioning groove 34, and the plurality of spherical grooves 331 are evenly spaced along the circumference of the base 33, and balls 332 for abutting against the positioning ring 23 are embedded in the spherical grooves 331.

[0060] Referring to Figure 2 , Figure 3 , Figure 4 , a cavity layer 311 is opened inside the handle column 31, and a first connecting ring 312 is welded on the upper inner wall of the cavity layer 311. Among them, a plurality of first guiding teeth 3121 are integrally arranged on the circumference of the first connecting ring 312, and a second connecting ring 313 is welded on the lower inner wall of the cavity layer 311. At the same time, a plurality of second guiding teeth 3131 are integrally arranged on the circumference of the second connecting ring 313, and the plurality of first guiding teeth 3121 and the plurality of second guiding teeth 3131 are distributed in a staggered manner. Among them, a guiding channel 314 is formed between the first guiding teeth 3121 and the second guiding teeth 3131, and a through hole 315 communicating with the cavity layer 311 is opened on the lower end surface of the handle column 31. At the same time, a lifting column 4 is arranged at the lower end of the handle column 31, with the upper end passing through the through hole 315 and the lower end welded to the end of the connecting rod 32, and guide columns 41 embedded in the guiding channel 314 are welded on both sides of the end of the lifting column 4 away from the connecting rod 32; among them, a push plate 316 located inside the first connecting ring 312 and abutting against the upper end surface of the lifting column 4 is arranged on the upper inner wall of the cavity layer 311, and a return spring 317 with the upper end welded to the upper inner wall of the cavity layer 311 and the lower end welded to the center of the push plate 316 is arranged inside the cavity layer 311.

[0061] Referring to Figure 2 , Figure 3 , Figure 4 , Figure 5, a fixing sleeve 5 is welded to the upper side of the base 33. One side of the connecting arm 35 away from the tooth groove 351 is integrally provided with a dovetail slide bar 352 whose extending direction is parallel to that of the connecting arm 35. Dovetail slide grooves 52 for the dovetail slide bar 352 to pass through are formed on the inner walls on both sides of the fixing sleeve 5. At this time, the fixing sleeve 5 can be used for the two connecting arms 35 to be slidably connected; meanwhile, a toothed hole 51 for the connecting rod 32 to pass through and be welded to the inner wall of the fixing sleeve 5 is formed on the upper side of the fixing sleeve 5. A toothed sliding sleeve 321 is sleeved on the connecting rod 32. The toothed sliding sleeve 321 is embedded in the toothed hole 51 and used in cooperation with the toothed hole 51. Tooth grooves 351 for the external teeth of the toothed sliding sleeve 321 to engage are formed on the side wall of the connecting arm 35; meanwhile, a connecting spring 322 whose upper end is welded to the lifting column 4 and lower end is welded to the toothed sliding sleeve 321 is sleeved on the connecting rod 32.

[0062] Principle: After the polystyrene board 102 is fixed, the surface of the polystyrene board 102 is subjected to a sweeping treatment by the sweeping device 3. During this process, the construction worker holds the handle column 31, and then inserts the end of the plug post 2 into the positioning groove 34 on the base 33. At this time, the plug post 2 can position the position of the base 33 on the polystyrene board 102; subsequently, the construction worker holds the handle column 31 and then presses down the handle column 31. At this time, the lifting column 4 can move upward into the handle column 31, and the return spring 317 is compressed. A plurality of first guiding teeth 3121 on the first connecting ring 312 and a plurality of second guiding teeth 3131 on the second connecting ring 313 are used. The plurality of first guiding teeth 3121 and the plurality of second guiding teeth 3131 are staggeredly distributed. As the lifting column 4 moves upward in the cavity layer 311, the guide post 41 on the lifting column 4 can move upward and then abut against the first guiding teeth 3121 and move along the inclined surface of the first guiding teeth 3121; meanwhile, when the construction worker cancels the downward pressure, under the elastic restoring force of the return spring 317, the lifting column 4 can move downward in the cavity layer 311, and the guide post 41 on the lifting column 4 can move downward and then abut against the second guiding teeth 3131 and move along the inclined surface of the second guiding teeth 3131; the movement of the guide post 41 on the lifting column 4 along the inclined surfaces of the first guiding teeth 3121 and the second guiding teeth 3131 can drive the lifting column 4 to rotate. Finally, with the construction worker pressing down again and again, the lifting column 4 can continuously rotate, thereby driving the rotation of the connecting arm 35, and the steel wire brush strip 36 abutting against the outer wall of the polystyrene board 102 can scuff the outer wall of the polystyrene board 102, thereby increasing the surface roughness of the polystyrene board 102, and finally increasing the adhesion between the rendering mortar 103 and the polystyrene board 102.

Claims

1. A construction method for a building exterior wall thermal insulation structure, characterized in that: The steps include: S1 Base wall cleaning: Before construction, you need to clean the base wall first, including removing dust, oil stains, and loose coatings on the wall to ensure that the wall is clean and flat; S2 Measurement, laying out, and hanging reference lines: According to the design requirements, measure the wall, determine the size and position of the polystyrene board, then lay out the lines, mark the installation position of the polystyrene board on the wall, and hang the horizontal reference line to ensure that the polystyrene board is installed horizontally; S3 Paste or anchor the polystyrene board: cut the polystyrene board into appropriate sizes according to the markings, and then use polymer mortar or special polystyrene board adhesive to paste or anchor the polystyrene board on the base wall; ensure that the polystyrene board and the wall are firmly bonded; at the same time, embed the plug in the center of the polystyrene board and fit the positioning ring on the outer wall of the polystyrene board; S4: Brushing the surface of the polystyrene board: After the polystyrene board is fixed, use a brushing device (3) to brush the surface of the polystyrene board to increase the surface roughness of the polystyrene board, thereby increasing the bonding force between the plastering mortar and the polystyrene board; S5 Apply a thin layer of plastering mortar: Apply a thin layer of plastering mortar on the surface of the polystyrene board, the thickness is generally 3-5mm, and use a scraper to evenly apply the plastering mortar on the surface of the polystyrene board to ensure that the plastering mortar and the polystyrene board are firmly bonded; S6 Laying and pressing the fiberglass mesh: Before the plastering mortar is completely dry, attach the fiberglass mesh to the surface of the plastering mortar, wherein the threaded shaft is passed through the fiberglass mesh and then threaded into the threaded groove of the plug column, and the pressure plate is attached to the fiberglass mesh, and then the surface of the fiberglass mesh is lightly pressed with a scraper to ensure the fit and bonding firmness of the fiberglass mesh to the wall; S7 Detail processing and adding fiberglass mesh: Process the details on the wall, such as windows and doorways, to ensure the surface is smooth; it should be noted that an additional layer of fiberglass mesh can be added to the protruding parts or corners to increase the overall crack resistance of the wall; S8: Leveling the surface layer with plastering mortar: After the bottom plastering mortar is fully dried, the surface layer is constructed; use a spatula to evenly apply the plastering mortar on the dry bottom plastering mortar, and make the wall surface smooth and flat through multiple scraping, compacting and leveling; S9 Construction of surface coating layer: After the surface coating mortar is dry, the surface coating layer is constructed; according to the design requirements, select appropriate exterior wall coatings for brushing or spraying to make the exterior wall surface have a beautiful decorative effect and increase the waterproof and weather-resistant performance of the wall; S10 Acceptance: After the construction is completed, the project will be accepted; check whether the wall flatness, appearance, coating adhesion and overall quality meet the requirements; the construction can be completed only after ensuring that the construction quality is qualified; The brushing device (3) comprises a handle column (31), a connecting rod (32) arranged at one end of the handle column (31), a base (33) arranged at one end of the connecting rod (32) away from the handle column (31), a positioning groove (34) provided at one end of the base (33) away from the connecting rod (32) and for the end of the plug column (2) to be inserted, connecting arms (35) arranged on both sides of the base (33), and a steel wire brush strip (36) arranged at the lower side of the connecting arm (35) and used to be attached to the outer wall of the polystyrene board (102); A cavity layer (311) is provided inside the handle column (31), a first connecting ring (312) is provided on the upper inner wall of the cavity layer (311), a plurality of first guide teeth (3121) are provided on the circumference of the first connecting ring (312), a second connecting ring (313) is provided on the lower inner wall of the cavity layer (311), a plurality of second guide teeth (3131) offset from the first guide teeth (3121) are provided on the circumference of the second connecting ring (313), a guiding channel (314) is formed between the first guide teeth (3121) and the second guide teeth (3131), and a guide channel (314) is provided on the lower end surface of the handle column (31) to extend from the cavity layer to the lower inner wall. (311), a lifting column (4) is disposed at the lower end of the handle column (31), the upper end of which passes through the through hole (315) and the lower end of which is connected to the end of the connecting rod (32), guide columns (41) embedded in the guide channel (314) are disposed on both sides of the lifting column (4) away from the end of the connecting rod (32), a push plate (316) is disposed on the upper inner wall of the cavity layer (311) and is located in the first connecting ring (312) and abuts against the upper end surface of the lifting column (4), and a return spring (317) is disposed in the cavity layer (311), the upper end of which is connected to the upper inner wall of the cavity layer (311) and the lower end of which is connected to the center of the push plate (316); A fixing sleeve (5) for sliding connection of two connecting arms (35) is provided on the upper side of the base (33); a toothed hole (51) is provided on the upper side of the fixing sleeve (5) for the connecting rod (32) to pass through and then connect with the inner wall of the fixing sleeve (5); a toothed sliding sleeve (321) is sleeved on the connecting rod (32) for embedding in the toothed hole (51) and cooperating with the toothed hole (51); and a tooth groove (351) is provided on the side wall of the connecting arm (35) for meshing with the external teeth of the toothed sliding sleeve (321).

2. The construction method of a building exterior wall thermal insulation structure according to claim 1, characterized in that: The outer wall of the base (33) located on the peripheral side of the positioning groove (34) is provided with a plurality of spherical grooves (331) with a cross-sectional profile in an arc shape, and the spherical grooves (331) are embedded with rolling balls (332) for contacting the positioning ring (23).

3. The construction method of a building exterior wall thermal insulation structure according to claim 1, characterized in that: A dovetail slide bar (352) is provided on one side of the connecting arm (35) away from the tooth groove (351), and its extension direction is parallel to the extension direction of the connecting arm (35). Dovetail slide grooves (52) for the dovetail slide bar (352) to pass through are provided on the inner walls on both sides of the fixing sleeve (5).

4. The construction method of a building exterior wall thermal insulation structure according to claim 1, characterized in that: The connecting rod (32) is sleeved with a connecting spring (322) whose upper end is connected to the lifting column (4) and whose lower end is connected to the toothed sliding sleeve (321).

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