A connecting structure for a semi-embedded fire hydrant cabinet of an ALC wall
By setting up a fixed wall and a back wall connection on the ALC wall, the problems of difficult groove cutting and insufficient wall strength of the ALC wall are solved, realizing low-cost and efficient fire hydrant box installation and ensuring building safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI BAOYE NANJING CONSTRUCTION CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-06-16
AI Technical Summary
In existing technologies, ALC walls require grooving when changing the installation category of fire hydrant boxes, which makes grooving difficult and costly. Furthermore, grooving alters the mechanical properties of the wall, affecting building safety.
An installation groove is made in the ALC wall, and the fire hydrant box is connected to the ALC wall as a whole by fixing the surrounding walls. The back of the box is connected to the back wall as a whole. Concrete, reinforced concrete and other materials are used to enhance the strength and fire resistance of the wall.
It reduces the difficulty and cost of grooving, improves the wall strength and fire resistance of the grooved area, and ensures building safety.
Smart Images
Figure CN224363480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a connection structure for a semi-embedded fire hydrant box for ALC walls, belonging to the field of building construction technology. Background Technology
[0002] Prefabricated buildings are constructed by prefabricating building components in a factory and then assembling them on-site. The interior walls of prefabricated buildings often utilize panel materials, including ALC (autoclaved aerated concrete), PC (precast concrete), ceramsite concrete, and gypsum board. ALC panels are made from cement, fly ash, and other raw materials, cured under high temperature and pressure, resulting in lightweight, porous, fire-resistant, and heat-insulating properties. Fire hydrant boxes, as essential fire-fighting equipment, are typically installed on ALC walls, using both exposed and concealed mounting methods. The connection method between the ALC walls and the fire hydrant boxes significantly impacts the structural safety of the ALC walls in prefabricated buildings.
[0003] In existing technologies, for exposed fire hydrant boxes, they are directly installed and fixed to the wall after the ALC wall construction is completed. For concealed fire hydrant boxes, a groove for the fire hydrant box is reserved during the ALC wall construction, and the fire hydrant box is installed after the wall construction is completed. However, in actual construction, sometimes the installation type of the fire hydrant box needs to be changed due to the user's requirements, such as changing from exposed to concealed installation to increase the width of the fire evacuation route. Therefore, it is necessary to cut grooves in the completed ALC wall to install the fire hydrant box. Because ALC panels are lightweight and porous, they are prone to cracking during actual grooving, and the depth of the grooves cannot be effectively controlled. Furthermore, ALC panels are made from raw materials such as cement and fly ash and cured under high temperature and pressure; only by ensuring the overall integrity of the panels can their lightweight, high strength, fireproof, and heat-insulating properties be fully utilized.
[0004] In existing technologies, grooving the completed ALC wall for installing fire hydrant boxes requires specialized grooving equipment to ensure dimensional accuracy of the groove depth, resulting in high costs and long grooving cycles. Furthermore, grooving alters the mechanical properties of the surrounding walls used to fix the fire hydrant box, leading to cracking or deformation after a certain period of use. For example, grooving a wall with a door structure can cause uneven stress on the side of the fire hydrant box facing the door, leading to damage. When grooving walls with fire hydrant pipes, the unsupported space between the hydrant box and pipes during installation can also cause uneven stress, damaging the fire hydrant box and compromising building safety. Therefore, a connection structure for semi-embedded fire hydrant boxes in ALC walls is needed to solve the problems in the existing technology where, when the installation category of the fire hydrant box changes, it is necessary to groove the ALC wall after construction. This is because grooving is difficult, the mechanical properties of the wall will change after grooving, and it will damage the fire hydrant box and affect the safety of building use. Utility Model Content
[0005] The purpose of this invention is to provide a connection structure for a semi-embedded fire hydrant box in an ALC wall, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a connection structure for a semi-embedded fire hydrant box in an ALC wall, comprising an ALC wall, a fire hydrant box, a back wall, and a fixed wall; an installation groove is provided on the ALC wall, and when the fire hydrant box is installed in the ALC installation groove, its four sides are connected to the ALC wall as a whole through the fixed wall, and its back box is connected to the back wall as a whole or the back box is connected to the ALC wall as a whole through the back wall; the fixed wall includes a concrete wall made of concrete, and the back wall includes a base layer made of wall bricks and a fireproof layer wall made of fireproof material.
[0007] Specifically, the fixed wall includes the top lintel of the box, the bottom masonry of the box, and the boundary masonry on both sides of the box; the top lintel of the box and the boundary masonry on both sides of the box are made of reinforced concrete, and the bottom masonry of the box is made of concrete blocks.
[0008] Specifically, a fire hydrant pipe is installed between the ALC wall and the side box of the fire hydrant box. A solid brick layer is installed on the outside of the fire hydrant pipe, and the solid brick layer is connected to the ALC wall as a whole by the junction masonry.
[0009] Specifically, the fire hydrant box has a door on its side facing the ALC wall, and a structural column is provided between the box and the ALC wall. The structural column is made of reinforced concrete, and the structural column and the ALC wall are connected as one unit through the back wall.
[0010] Specifically, there is an upper masonry structure between the top lintel of the box body and the lower hanging beam of the ALC wall. The upper masonry structure includes an aerated block layer made of aerated blocks and a sealing layer. The aerated block layer is connected to the top lintel of the box body, and there is a gap between it and the lower hanging beam of the ALC wall to fill the sealing layer. The sealing layer is made of fine stone concrete.
[0011] Specifically, the top lintel of the box girder includes longitudinal steel bars, stirrups, and a fine aggregate concrete layer. The longitudinal steel bars are embedded in the ALC wall, and the depth of the embedment is more than 10 times the diameter of the longitudinal steel bars. The stirrups are fixedly installed on the longitudinal steel bars to form a steel cage. The steel cage is then poured with the fine aggregate concrete layer to form reinforced concrete to create the top lintel of the box girder.
[0012] Specifically, the bottom masonry of the box includes a solid concrete brick layer and a cement mortar bonding layer. The solid concrete brick layer is installed between the fire hydrant box and the building floor, and a cement mortar bonding layer is built between the three.
[0013] Specifically, the boundary masonry includes an aerated concrete block layer, a mortar layer, and tie bars; the aerated concrete block layer is installed between the fire hydrant box and the ALC wall, with a mortar layer between them, and tie bars are provided between the aerated concrete block layer and the ALC wall at intervals.
[0014] Specifically, the base layer of the back wall is filled with a layer of wall tile adhesive between the wall tiles; the fireproof layer includes a cement board and a plaster layer; the cement board is connected to the fire hydrant box, and the side of the cement board away from the fire hydrant box is coated with a plaster layer.
[0015] Specifically, a steel mesh is installed inside the plaster layer, and the thickness of the steel mesh is 1 / 5 of the thickness of the plaster layer; several vertical corrosion-resistant metal square tubes are installed at intervals between the cement board and the fire hydrant box.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] 1. This application involves creating an installation groove in the ALC wall for installing fire hydrant boxes. When installing the fire hydrant box in the installation groove, to improve the wall strength and fire resistance at the corresponding positions of the ALC wall and the fire hydrant box, this application uses a traditional wall grooving method. However, this results in the inability to precisely control the groove depth. To address this, a back wall is provided to connect the back of the fire hydrant box to the back wall, or the back of the box to the ALC wall via the back wall. Specifically, if the thickness of the ALC wall and the fire hydrant box are similar, the groove can be made directly through the ALC wall, and then the back wall is constructed to fill the thickness difference between the fire hydrant box and the ALC wall. If the thickness of the ALC wall differs significantly from the thickness of the fire hydrant box, the groove depth only needs to reach the thickness of the fire hydrant box, without penetrating the ALC wall. In this case, the groove depth will be slightly greater than the installation depth of the box. To address this, a back wall is constructed to fill the thickness difference between the ALC wall and the fire hydrant box. For the ALC walls corresponding to the positions around the fire hydrant box, a concrete wall is installed to enhance the load-bearing strength and fire resistance of the wall at the box's location. The back wall does not need to support the fire hydrant box; therefore, a back wall is constructed, consisting of a base layer made of bricks and a fire-resistant layer made of fire-resistant material, to support the ALC wall and improve its fire resistance. This application reduces the difficulty and cost of grooving and improves the strength and fire resistance of the wall at the groove opening.
[0018] 2. Based on the foregoing, the fixed wall structure of this application includes a lintel at the top of the box, masonry at the bottom of the box, and boundary masonry on both sides of the box; the lintel at the top of the box and the boundary masonry on both sides of the box are made of reinforced concrete, while the masonry at the bottom of the box is made of concrete blocks. This achieves enclosed support for the fire hydrant box around its perimeter through the reinforced concrete structure of the lintel at the top of the box, the boundary masonry on both sides of the box, and the masonry at the bottom of the box, thereby improving the strength and fire resistance of the wall at the installation groove.
[0019] 3. Building upon the foregoing, when a door structure is provided on the ALC wall, in order to improve the strength of the wall where the mounting slot is located, this application proposes to install a structural column between the side box of the fire hydrant box facing the ALC wall and the ALC wall. The structural column is made of reinforced concrete and is integrated with the ALC wall via the back wall. This achieves the purpose of supporting and reinforcing the wall where the mounting slot is located by installing the structural column.
[0020] 4. Building upon the foregoing, when fire hydrant pipes are installed within the ALC wall, to enhance the strength of the wall containing the installation slot, this application involves installing a solid brick layer on the outside of the fire hydrant pipe, with the solid brick layer and the ALC wall connected as a single unit via a joint masonry structure. This achieves support and reinforcement of the wall containing the installation slot through the solid brick layer and the joint masonry, thereby improving the wall's mechanical properties.
[0021] 5. Based on the foregoing, the top lintel of the box-shaped structure in this application is formed by reinforcing cage and fine aggregate concrete pouring. A masonry structure made of aerated concrete blocks is installed above the lintel to support the structure between the top lintel and the lower beam of the ALC wall. This facilitates wall construction after the slotting, simplifies the construction cycle, and improves wall strength. The same construction concept applies to the construction of the boundary masonry on both sides of the box-shaped structure and the bottom masonry. To improve the connection stability between the boundary masonry and the ALC wall, this application uses tie rods for reinforcement. The bottom masonry of the box-shaped structure mainly serves to bear the load and transfer the load of the upper wall to the ground structure. It is constructed using layers of solid concrete bricks and cement mortar to improve the wall's load-bearing capacity. Attached Figure Description
[0022] Figure 1 This is a plan view of the connection structure of the semi-embedded fire hydrant box for the ALC wall in this embodiment;
[0023] Figure 2 This is an elevation view of the connection structure of the semi-embedded fire hydrant box for the ALC wall in this embodiment. Detailed Implementation
[0024] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. For clarity, in this embodiment, when the fire hydrant box is installed in the ALC wall, an elevator door is provided on the left side of the box, and a fire hydrant pipe, including a main pipe and branch pipes, is provided in the wall on the right side. The thickness of the ALC wall is 20cm. The fire hydrant box is semi-embedded in the wall with an installation depth of 10cm. Since the groove depth is close to the wall thickness, this embodiment uses a groove-cutting method that penetrates the ALC wall, and then a back wall is built on the back of the box. The specifications of the fire hydrant box in this embodiment are: a thin box type, width 700mm * height 1800mm * thickness 160mm, and the hydrant outlet is 1.1m from the floor (ground).
[0025] Please see Figures 1-2This embodiment discloses a connection structure for a semi-embedded fire hydrant box in an ALC wall, including an ALC wall, a fire hydrant box 3, a back wall 14, and a fixed wall; the ALC wall has an installation groove, and when the fire hydrant box is installed in the ALC installation groove, its four sides are connected to the ALC wall as one unit through the fixed wall, and its back box is connected to the back wall as one unit; the fixed wall includes a concrete wall made of concrete, and the back wall includes a base layer made of wall bricks and a fireproof layer wall made of fireproof material.
[0026] The fixed wall in this embodiment includes a top beam 11, a bottom masonry 10, and boundary masonry 2 on both sides of the box; the top beam and the boundary masonry 2 on both sides of the box are made of reinforced concrete, and the bottom masonry is made of concrete blocks.
[0027] Furthermore, in this embodiment, the fire hydrant pipe 1 between the ALC wall and the side panel of the fire hydrant box is provided with a solid brick layer on its outer side, and the solid brick layer is connected to the ALC wall as a whole by a junction masonry. In this embodiment, a structural column 4 is provided between the side panel of the fire hydrant box facing the ALC wall and the ALC wall. The structural column is made of reinforced concrete, and the structural column is connected to the ALC wall as a whole by a back wall.
[0028] In this embodiment, a lintel is provided between the top lintel of the box-shaped structure and the lower beam of the ALC wall. The upper masonry of the lintel includes an aerated concrete block layer and a sealing layer. The aerated concrete block layer is connected to the top lintel of the box-shaped structure, and a 30mm gap is reserved between it and the lower beam of the ALC wall during construction. After 14 days of construction of the upper masonry of the lintel, a fine stone concrete layer is poured to seal it tightly. In this embodiment, the lower beam is brought out in one go during the construction of the main building when it encounters a door. The top lintel of the box-shaped structure in this embodiment is 200mm wide and 120mm high. It includes four 10mm diameter HRB400E longitudinal steel bars, 6mm diameter stirrups, and a fine stone concrete layer. The longitudinal steel bars are embedded in the ALC wall to a depth greater than 10 times the diameter of the longitudinal steel bars. The stirrups are fixedly installed on the longitudinal steel bars to form a steel cage. The steel cage is poured with the fine stone concrete layer to form reinforced concrete to create the top lintel of the box-shaped structure. In this embodiment, the bottom masonry of the fire hydrant box is 170mm high and 200mm wide. It includes a solid concrete brick layer made of MU15 solid concrete bricks and a cement mortar bonding layer made of DMM10. The solid concrete brick layer is installed between the fire hydrant box and the building floor, and the cement mortar bonding layer is laid between the three. The boundary masonry includes an aerated concrete block layer made of B06 aerated concrete blocks, a mortar layer made of DMM5, and tie bars. The aerated concrete block layer is installed between the fire hydrant box and the ALC wall, and a mortar layer is laid between the two. Two 6mm diameter tie bars are installed between the aerated concrete block layer and the ALC wall at 500mm intervals. The back wall consists of a 10mm thick base layer 9 made of wall bricks, filled with a wall brick adhesive layer 8, achieving 100% adhesion. The fireproof layer comprises a 50mm thick cement board and a 20mm thick plaster layer, with a plaster grade of DPM15. The cement board 6 is connected to the fire hydrant box, and the side of the cement board furthest from the fire hydrant box is coated with a plaster layer 7. In this embodiment, a 4mm thick @150 steel mesh is installed inside the plaster layer to strengthen the wall and improve seismic resistance. Several vertical galvanized square tubes 5 are installed at intervals between the cement board and the fire hydrant box. These tubes are 50mm long, 30mm wide, and 4mm thick, with an installation spacing of 600mm.
[0029] Working Principle: In this embodiment, the connection structure for the semi-embedded fire hydrant box in the ALC wall involves creating an installation groove in the ALC wall using a grooving device, based on the box's dimensions. During grooving, the groove penetrates the wall directly along its thickness. The wall containing the groove only needs to be cut according to the groove dimensions; once the dimensions are met, the wall is leveled. Next, the back wall is constructed, followed by the fixing wall. During the fixing wall construction, structural columns are built on the side of the box with the door structure, according to construction requirements. For the wall with the fire hydrant pipe, after grooving, the groove is sealed with solid bricks. A boundary masonry is constructed between the fire hydrant pipe and the ALC wall.
[0030] After the construction of the fixed wall and the back wall is completed, the fire hydrant box is installed in the installation groove, and the wall surface is then leveled and finished.
[0031] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present invention, several equivalent changes and substitutions can be made without departing from the principle of the present invention. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present invention.
Claims
1. A connection structure for a semi-embedded fire hydrant box in an ALC wall, comprising an ALC wall, a fire hydrant box, a back wall, and a fixed wall; characterized in that: The ALC wall has an installation groove. When the fire hydrant box is installed in the ALC installation groove, its four sides are connected to the ALC wall as one unit through the fixed wall, and its back box is connected to the back wall as one unit or the back box is connected to the ALC wall as one unit through the back wall. The fixed wall includes a concrete wall made of concrete, and the back wall includes a base layer made of wall bricks and a fireproof layer wall made of fireproof material.
2. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 1, characterized in that: The fixed wall includes a top lintel of the box, bottom masonry of the box, and boundary masonry on both sides of the box; the top lintel of the box and the boundary masonry on both sides of the box are made of reinforced concrete, and the bottom masonry of the box is made of concrete blocks.
3. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: A fire hydrant pipe is provided between the ALC wall and the side box of the fire hydrant box. The outside of the fire hydrant pipe is provided with a solid brick layer, and the solid brick layer and the ALC wall are connected as one unit by the junction masonry.
4. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: The fire hydrant box has a door on its side facing the ALC wall. A structural column is provided between the box and the ALC wall. The structural column is made of reinforced concrete and is connected to the ALC wall as a whole through the back wall.
5. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: The top lintel of the box body and the lower hanging beam of the ALC wall are provided with upper masonry of the lintel. The upper masonry of the lintel includes an aerated block layer made of aerated blocks and a sealing layer. The aerated block layer is connected to the top lintel of the box body, and there is a gap between it and the lower hanging beam of the ALC wall to fill the sealing layer. The sealing layer is made of fine stone concrete.
6. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: The top lintel of the box includes longitudinal steel bars, stirrups, and a fine aggregate concrete layer. The longitudinal steel bars are embedded in the ALC wall, and the depth of the embedment is greater than 10 times the diameter of the longitudinal steel bars. The stirrups are fixedly installed on the longitudinal steel bars to form a steel cage. The steel cage is cast with the fine aggregate concrete layer to form reinforced concrete to make the top lintel of the box.
7. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: The bottom masonry of the box includes a solid concrete brick layer and a cement mortar bonding layer. The solid concrete brick layer is installed between the fire hydrant box and the building floor, and the cement mortar bonding layer is built between the three.
8. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 2, characterized in that: The boundary masonry includes an aerated concrete block layer, a mortar layer, and tie bars; the aerated concrete block layer is installed between the fire hydrant box and the ALC wall, with a mortar layer between them, and tie bars are provided at intervals between the aerated concrete block layer and the ALC wall.
9. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 1, characterized in that: The base layer of the back wall is filled with a wall tile adhesive layer between the wall tiles; the fireproof layer includes a cement board and a plaster layer; the cement board is connected to the fire hydrant box, and the plaster layer is applied to the side of the cement board away from the fire hydrant box.
10. The connection structure for a semi-embedded fire hydrant box in an ALC wall according to claim 9, characterized in that: The plaster layer is internally reinforced with a steel mesh, and the thickness of the steel mesh is 1 / 5 of the thickness of the plaster layer; several vertical corrosion-resistant metal square tubes are installed at intervals between the cement board and the fire hydrant box.