An anchor for fixing the thermal insulation layer of existing building exterior walls

Abstract

This utility model relates to the field of building auxiliary materials, and in particular to an anchor bolt for fixing the thermal insulation layer of existing building exterior walls. It includes an anchor plate, an anchor bolt sleeve, a mixing body, an auxiliary nail core, and a sleeve head. The anchor bolt sleeve is provided with multiple barbs. The sleeve head includes a solvent chamber and a spraying part coaxially connected. The solvent chamber contains two cavities separated by multiple PVE elastic films, each containing an epoxy resin base and an epoxy resin curing agent. The auxiliary nail core drives the mixing body to rotate, ensuring thorough mixing of the epoxy resin base and curing agent. The mixed epoxy resin flows out through the spraying part, filling the gap between the anchor bolt and the wall. After the epoxy resin cures, the anchor bolt and the wall become integrated, achieving the effect of fixing the thermal insulation board.

Description

Technical Field

[0001] This utility model relates to the field of building auxiliary materials, and in particular to an anchor bolt for fixing the thermal insulation layer of existing building exterior walls. Background Technology

[0002] In the renovation of old residential areas, the replacement of the external wall insulation layer is a very important renovation item. At present, the replacement of the external wall insulation layer usually adopts the process of "drilling anchor bolt holes in the insulation layer and the wall, passing traditional expansion anchor bolts through the anchor bolt holes in the insulation layer and the wall in sequence, and screwing the anchor bolt core into the anchor bolt sleeve, so that the anchor bolt sleeve expands and abuts against the anchor bolt hole to generate pre-tightening force" to fix the external wall insulation layer and the wall.

[0003] The walls of older residential buildings generally suffer from aging due to their long service life. Tests show that the compressive strength of traditional sintered clay brick masonry decreases by 40%-60% after 30 years of service, and the carbonation depth of the concrete typically exceeds the thickness of the protective layer. This causes the anchor bolt holes to enlarge due to vibrations during drilling. When traditional expansion anchors are inserted into the holes, the distance between the anchor sleeve and the hole increases, causing the sleeve to expand within the hole. This reduces the preload between the sleeve and the wall, weakening the anchoring force. Furthermore, after using traditional expansion anchors to fix the external wall insulation layer to the wall, the anchor core cannot be removed for reuse. Utility Model Content

[0004] This utility model aims to solve the above problems and provides an anchor bolt for fixing the thermal insulation layer of existing building exterior walls. The technical solution adopted is as follows:

[0005] An anchor for fixing the thermal insulation layer of an existing building exterior wall includes an anchor plate, an anchor sleeve, an auxiliary nail core, and a sleeve head. The anchor sleeve is a hollow tubular structure, with one end connected to the anchor plate and the other end connected to the sleeve head, all three being coaxially connected. The anchor plate is a disc-shaped structure with a through hole at its center. The auxiliary nail core passes through the through hole and can be slidably inserted into the anchor sleeve. The sleeve head includes a solvent chamber and a spray section coaxially connected. The solvent chamber contains two cavities separated by multiple PVE elastic membranes, each containing an epoxy resin base and an epoxy resin curing agent. The spray section is located on the side of the sleeve head away from the anchor sleeve. The length of the auxiliary nail core is not shorter than the sum of the lengths of the anchor plate, the anchor sleeve, and the sleeve head.

[0006] Based on the above scheme, the outer middle part of the anchor sleeve has multiple barbs extending outward toward the anchor plate, and the tail end of the barb is provided with an elastic material connected to the anchor sleeve. The elastic material drives the tail end of the barb away from the anchor sleeve.

[0007] Based on the above scheme, the number of barbs is 4, and they are evenly distributed around the anchor bolt sleeve.

[0008] Preferably, it also includes a stirring body, the outer diameter of which is the same as the inner diameter of the anchor bolt sleeve and is built into the anchor bolt sleeve. The stirring body is disposed between the end of the auxiliary nail core and the sleeve head, and the auxiliary nail core drives the stirring body to rotate synchronously. The stirring body has multiple outwardly protruding stirring heads facing the sleeve head end.

[0009] Preferably, the solvent cavity has an axially oriented concave-convex structure on its outer side, and the distance between the outer extensions of the convex structures symmetrical about the center point in the same plane is greater than the outer diameter of the anchor bolt sleeve.

[0010] Preferably, the diameter of the sleeve head gradually increases in the direction away from the anchor plate.

[0011] Preferably, the spray section has a frustum-shaped structure, and its diameter gradually decreases in the direction away from the anchor bolt sleeve.

[0012] Preferably, the auxiliary nail core has threads on its shank and a cross groove on its head, and the anchor plate through hole has a threaded hole corresponding to the threads of the auxiliary nail core.

[0013] Based on the above scheme, the diameter of the nail head of the auxiliary nail core is larger than the diameter of the nail rod, and the diameter of the top cap is larger than the diameter of the through hole of the anchor plate.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model incorporates epoxy resin main agent and curing agent in the solvent chamber. The auxiliary nail core drives the stirring part to stir the epoxy resin main agent and curing agent, achieving full mixing of the two. The mixed epoxy resin flows out through the spraying part and fills the gap between the anchor bolt and the wall, making the anchor bolt and the wall a whole, thus achieving the effect of fixing the insulation board.

[0016] 2. By setting barbs on the anchor bolt sleeve and setting slightly outward-expanding concave-convex structures on the sleeve head, the gap between the anchor bolt sleeve and the wall can be reduced, thereby reducing the risk of reduced pre-tightening force and weakened anchoring force after the anchor bolt is combined with the wall due to the increase in anchor bolt hole size caused by drilling vibration.

[0017] 3. Compared with traditional anchor bolt structures, this utility model uses new technologies such as epoxy resin filling and curing, barbs on the anchor bolt sleeve, and slightly outward-expanding concave-convex structure on the sleeve head to fix the anchor bolt to the wall. It no longer relies on the method of expanding the anchor bolt through auxiliary nail core to complete the fixation of the anchor bolt to the wall. It can realize the recycling of auxiliary nail core, which is in line with the concept of green development. Attached Figure Description

[0018] Figure 1 : A schematic diagram of the structure of this utility model;

[0019] Figure 2This utility model shows the state after the insulation layer is fixed to the wall. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In the description of this utility model, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," and "inner," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1As shown, an anchor bolt for fixing the thermal insulation layer of an existing building exterior wall includes an anchor plate 1, an anchor bolt sleeve 2, an auxiliary nail core 3, and a sleeve head 6. The anchor bolt sleeve 2 is a hollow tubular structure, with one end connected to the anchor plate 1 and the other end connected to the sleeve head 6, all three being coaxially connected. The anchor plate 1 is a disc-shaped structure with a through hole at its center. The auxiliary nail core 3 passes through the through hole and can be slidably inserted into the anchor bolt sleeve 2. The sleeve head 6 includes a solvent chamber 61 and a spray section 62 coaxially connected. The solvent chamber 61 contains two cavities separated by multiple PVE elastic membranes 7, each containing an epoxy resin base agent and an epoxy resin curing agent. The spray section 62 is located on the side of the sleeve head 6 away from the anchor bolt sleeve 2. The length of the auxiliary nail core 3 is not shorter than the sum of the lengths of the anchor plate 1, the anchor bolt sleeve 2, and the sleeve head 6. During use, the operator holds the auxiliary nail core 3 and passes it through the through hole of the anchor plate 1, allowing it to slide towards the spray section within the inner cavity of the anchor sleeve 2. After piercing the PVE elastic membrane 7 at the top of the solvent chamber 61, the operator holds the nail head of the auxiliary nail core 3 and shakes it radially along the inner wall of the anchor sleeve 2 to stir the epoxy resin main agent and epoxy resin curing agent. After the two are fully mixed, the operator continues to hold the auxiliary nail core 3 and slide it downwards along the inner cavity of the sleeve 2 until it pierces the PVE elastic membrane 7 at the bottom of the solvent chamber 61. This allows the mixed epoxy resin to flow out along the spray section and fill the gap between the anchor and the wall. After the epoxy resin cures, the anchor and the wall become one, achieving the effect of fixing the insulation board.

[0025] Preferably, the present invention further includes a stirring body 5, the outer diameter of which is the same as the inner diameter of the anchor sleeve 2, and is built into the anchor sleeve 2. The stirring body 5 is disposed between the end of the auxiliary nail core 3 and the sleeve head 6, and the auxiliary nail core 3 drives the stirring body 5 to rotate synchronously. For example, a regular polygonal protrusion is provided at the end of the nail core, and a regular polygonal groove is provided on the top of the stirring body. The stirring body 5 has multiple outwardly protruding stirring heads facing the sleeve head 6. In use, the operator first passes the auxiliary nail core 3 through the through hole of the anchor plate 1, so that it moves towards the spraying part in the inner cavity of the anchor sleeve 2. After the end of the nail core reaches the stirring body 5, the matching concave and convex structures at the end of the nail core and the top of the stirring body connect the two together and achieve synchronous rotation. The multiple outwardly protruding stirring heads of the stirring body 5 facing the sleeve head 6 increase the contact area between the epoxy resin main agent and the epoxy resin curing agent during mixing, making the two mix more thoroughly and improving work efficiency. Meanwhile, since the outer diameter of the mixing body 5 is the same as the inner diameter of the anchor sleeve 2, the mixed epoxy resin is prevented from flowing out from the anchor plate 1 side, so that it can only flow out from the spraying part 62, thus avoiding waste of epoxy resin.

[0026] Preferably, the spraying part 62 of this utility model has a frustum-shaped structure, and the diameter gradually decreases in the direction away from the anchor sleeve 2. By reducing the area of ​​the spraying nozzle, the outflow rate of epoxy resin is increased, and accumulation at the spraying nozzle is avoided, so that the epoxy resin can flow into the gap between the anchor and the wall to achieve a full filling effect.

[0027] Preferably, the auxiliary nail core 3 of this invention has threads on its shank and a cross-shaped groove on its head. The inner side of the through hole of the anchor plate 1 has a threaded hole corresponding to the threads of the auxiliary nail core 3. Through threaded engagement, the auxiliary nail core 3 can always move along the central axis of the anchor sleeve 2 towards the stirring body 5, facilitating the connection between the auxiliary nail core 3 and the stirring body 5. Simultaneously, the cross-shaped groove on the head allows the operator to quickly screw the auxiliary nail core 3 into and out of the anchor sleeve 2 using tools such as an electric wrench, improving work efficiency. The diameter of the nail head of the auxiliary nail core 3 is larger than the diameter of the nail shank, and the diameter of the top cap is larger than the diameter of the through hole of the anchor plate 1, preventing the auxiliary nail core 3 from being completely screwed into the anchor sleeve 2.

[0028] Preferably, the anchor sleeve 2 has multiple barbs 21 extending outward toward the anchor plate 1 at the middle of its outer side, such as four barbs evenly distributed around the anchor sleeve 2. The tail end of each barb 21 is provided with an elastic material connected to the anchor sleeve 2. This elastic material drives the tail end of the barb 21 away from the anchor sleeve 2. The elastic material can be a spring, elastic plastic, etc. During the process of inserting the anchor sleeve 2 into the anchor hole, because the barbs move in the same direction and are constrained by the space of the anchor hole in the wall, the barbs 21 will compress the elastic material, putting it in a pre-tightened compressed state. After the anchor sleeve 2 smoothly enters the anchor hole, the elastic material, being in a compressed state, will continuously exert an outward expanding force on the barbs 21, causing the barbs 21 to abut against the wall and become unable to retract, thus increasing the fixing force between the anchor and the wall.

[0029] Preferably, the solvent cavity 61 of this invention has an axially oriented concave-convex structure on its outer side, and the distance between the outer extensions of the convex structures symmetrically arranged around the center point in the same plane is greater than the outer diameter of the anchor bolt sleeve 2. The diameter of the sleeve head 6 gradually increases in the direction away from the anchor plate 1. Because the walls of the renovated community are mostly in an aging state, the actual size of the anchor bolt hole may be larger than the designed hole size due to construction vibration, resulting in a large gap between the anchor bolt and the wall. The above structural design can reduce the gap between the anchor bolt and the wall, increase the contact curing area between the anchor bolt and the epoxy resin, and improve the anchoring force between the anchor bolt and the wall.

[0030] like Figure 2 As shown, compared to the traditional anchor bolt structure that achieves anchor bolt expansion through auxiliary nail core 3, this utility model achieves anchor bolt fixation to the wall through new technologies such as epoxy resin filling and curing, barbs on the anchor bolt sleeve 2, and a slightly outwardly expanding concave-convex structure on the sleeve head 6. The anchor bolt fixation to the wall no longer depends on auxiliary nail core 3. Furthermore, through the threaded structure of the anchor plate 1 and auxiliary nail core 3, the auxiliary nail core 3 can be screwed in and out of the anchor bolt sleeve 2, enabling the recycling of the auxiliary nail core 3, which is in line with the concept of green development.

[0031] The installation state of this utility model is as follows: Figure 2As shown, the wall structure includes, sequentially arranged from the inside out, a base wall 81, bonding mortar 82, insulation layer 83, and finishing layer 84. When installing the anchor bolts, first, an installation hole is drilled in the wall, with the hole diameter matching the outer diameter of the anchor bolt sleeve 2. The anchor bolt sleeve 2 is inserted into the installation hole, and then the auxiliary nail core 3 is inserted into the anchor bolt sleeve 2 and gradually screwed inwards until the auxiliary nail core 3 pushes the mixing body 5 to contact the spraying part 62. Then, the auxiliary nail core 3 is rotated outwards in the opposite direction until it is removed. At this point, all the epoxy resin is squeezed out, gradually allowing the anchor bolt and wall structure to solidify, thereby achieving the effect of fixing the insulation board. Afterwards, the finishing layer 84 and other structures are constructed on the outside of the anchor plate 1.

[0032] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An anchor bolt for fixing an external wall insulation layer of an existing building, characterized in that, The device includes an anchor plate (1), an anchor sleeve (2), an auxiliary nail core (3), and a sleeve head (6). The anchor sleeve (2) is a hollow tubular structure, with one end connected to the anchor plate (1) and the other end connected to the sleeve head (6). The three are coaxially connected. The anchor plate (1) is a disc-shaped structure with a through hole in the center. The auxiliary nail core (3) can be slidably inserted into the anchor sleeve (2) after passing through the through hole. The sleeve head (6) includes a solvent chamber (61) and a spray section (62) connected coaxially. The solvent chamber (61) contains two cavities separated by multiple PVE elastic membranes (7). The cavities are respectively filled with epoxy resin main agent and epoxy resin curing agent. The spray section (62) is located on the side of the sleeve head (6) away from the anchor sleeve (2). The length of the auxiliary nail core (3) is not shorter than the sum of the lengths of the anchor plate (1), the anchor sleeve (2), and the sleeve head (6).

2. The anchoring bolt for fixing the external wall insulation layer of an existing building according to claim 1, characterized in that, The anchor sleeve (2) has multiple barbs (21) extending outward toward the anchor plate (1) at the middle of its outer side. The tail end of the barb (21) is provided with an elastic material connected to the anchor sleeve (2), and the elastic material drives the tail end of the barb (21) away from the anchor sleeve (2).

3. The anchoring bolt for fixing the external wall thermal insulation layer of an existing building according to claim 2, characterized in that, The number of barbs (21) is 4, and they are evenly distributed around the anchor sleeve (2).

4. An anchor for fixing the thermal insulation layer of an existing building's exterior wall according to claim 1, characterized in that, It also includes a stirring body (5), the outer diameter of which is the same as the inner diameter of the anchor sleeve (2) and is built into the anchor sleeve (2). The stirring body (5) is set between the end of the nail rod of the auxiliary nail core (3) and the sleeve head (6), and the auxiliary nail core (3) drives the stirring body (5) to rotate synchronously. The stirring body (5) has multiple outwardly protruding stirring heads facing the sleeve head (6).

5. An anchor for fixing the thermal insulation layer of an existing building's exterior wall according to claim 1, characterized in that, The solvent cavity (61) has an axially arranged concave and convex structure on its outer side, and the distance between the outer extensions of the convex structures symmetrical about the center point in the same plane is greater than the outer diameter of the anchor sleeve (2).

6. The anchoring bolt for fixing the external wall thermal insulation layer of an existing building according to claim 1, characterized in that, The diameter of the sleeve head (6) gradually increases in the direction away from the anchor plate (1).

7. The anchoring bolt for fixing the external wall thermal insulation layer of an existing building according to claim 1, characterized in that, The spray section (62) has a frustum-shaped structure, and its diameter gradually decreases in the direction away from the anchor sleeve (2).

8. The anchoring bolt for fixing the external wall insulation layer of an existing building according to claim 1, characterized in that, The auxiliary nail core (3) has a threaded rod and a cross groove on the nail head. The anchor plate (1) has a threaded hole inside the through hole that corresponds to the thread of the auxiliary nail core (3).

9. The anchoring bolt for fixing the external wall thermal insulation layer of an existing building according to claim 8, characterized in that, The diameter of the nail head of the auxiliary nail core (3) is greater than the diameter of the nail rod, and the diameter of the top cap is greater than the diameter of the through hole of the anchor plate (1).

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