Prefabricated embedded structure and method for branch pipe of fire water system

Abstract

The present invention discloses an assembled pre-embedded structure and method for a branch pipe of a fire water system. A sleeve (2) and a junction box (3) are pre-embedded in a precast slab (1). The junction box (3) is located at both ends of the precast slab. The sleeve (2) is communicated with the junction box (3). A branch pipe (4) of the fire water system is installed in the sleeve (2). Two branch pipes (4) of the fire water system are connected by a tee in the junction box (3) and a spray head is installed. By adopting a double-layer pre-embedding method, the sleeve is pre-embedded first and then the branch pipe of the fire water system is inserted. In this way, even if the pipeline is damaged, the pipeline can be taken out and a new water pipe can be replaced, solving the problem of the maintenance of the pre-embedded water pipe.

Description

Technical Field

[0001] The invention relates to the field of fire protection construction, and in particular to a pre-buried structure of a branch pipe of a fire protection water system. Background Art

[0002] At present, due to the lack of prefabricated fire protection in China, unified design, standard construction and management have not been achieved, the pipeline layout is different, there are many construction problems and collisions, and the installation is low efficiency and safety hazards due to high-altitude operations. From the perspective of technical process analysis, the use of prefabricated pre-buried pipes is efficient, the installation quality is unified and standardized, and pre-buried delays and wasted work are reduced. However, there are currently two factors that limit the pre-buried fire protection pipelines: 1. No standardized design was performed during the design, and the spacing between each spray point is different, making it difficult to prefabricate. 2. If the pre-buried water pipe breaks or leaks, it is difficult to repair. For the first problem, it can be solved through the already disclosed patent (application number 202010023786.4). This technology is used to standardize the spacing of the spray nodes and determine the location of each spray node, making it possible to pre-bury the fire protection water pipes. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide a new embedded structure for the problem that the current fire protection pipeline construction cannot realize assembled embedded pipe fittings.

[0004] The technical solution of the present invention is:

[0005] A fire water system branch pipe assembled embedded structure, including a prefabricated plate, a pre-embedded sleeve and a junction box in the prefabricated plate, the junction box is located at both ends of the prefabricated plate, the sleeve and the junction box are connected, the fire water system branch pipe is installed in the sleeve, two fire water system branches are connected by a tee in the junction box and a sprinkler head is installed.

[0006] When there is a suspended ceiling and the sprinkler head cannot be installed at the predetermined position, the sprinkler head can bypass the suspended ceiling position through a hose and a tee connection, or the sprinkler head can be connected to the tee of the junction box for downward spraying and a heat collecting plate can be added.

[0007] The branch pipes of the fire water system are PVC-C pipes.

[0008] Precast panels and fire water system branches are standard lengths.

[0009] After the two prefabricated panels are spliced, the two junction boxes are assembled into a wiring space, and the space size is sufficient for the branch pipe of the fire water system to be inserted into the sleeve without plastic deformation.

[0010] The junction box is a six-sided box body with the upper surface and one side surface missing.

[0011] The junction box may also be a six-sided box body lacking an upper surface, a lower surface and a side surface, and the sleeve is pre-buried on the central axis in the length direction of the prefabricated panel.

[0012] A method for pre-embedding a branch pipe of a fire water system, characterized by comprising:

[0013] A. Optimize the design drawings and adjust the positions of each spray node on the pipeline so that the distance between two adjacent nodes is the standard distance;

[0014] B prefabricates the prefabricated panel as claimed in claim 5;

[0015] C Assembling prefabricated panels;

[0016] DInsert the fire water system branch pipe and install the tee.

[0017] The prefabricated panels are cast on site, with pre-buried steel bars and casings and junction boxes arranged according to the spacing. The casings and junction boxes adopt an integrated seamless structure.

[0018] Beneficial effects of the present invention:

[0019] A double-layer pre-buried method is adopted, where the casing is pre-buried first and then the fire water system branch pipe is inserted. In this way, even if the pipeline is damaged, the pipeline can be taken out and replaced with a new one, solving the problem of pre-buried water pipe maintenance.

[0020] The use of prefabricated embedded pipes is highly efficient, with uniform and standardized installation quality, reducing pre-buried work delays and collisions. The subsequent prefabricated standardized construction is efficient and fast, with a short construction period and broad development prospects.

[0021] At present, the country advocates the construction of assembled buildings. The present invention meets the requirements of pre-embedded fire water pipes when the concrete wall top is prefabricated in the factory, thereby improving the assembly utilization rate. For the parts with decorated ceilings, the branch pipes can be completely pre-embedded at a uniform spacing of 3 meters, and the accuracy can be ignored. The lower spray adopts a 1.8-meter hose to adjust and compensate for the distance error. The pre-embedded process can be applied to the prefabrication of assembled buildings in factories, and can also be applied to the process of pre-embedded concrete pouring on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 for Figure 1 A partial enlarged view of .

[0024] Figure 3 This is a schematic diagram of the structure after two prefabricated panels are spliced ​​together.

[0025] Figure 4 This is a schematic diagram of the structure of Example 2. DETAILED DESCRIPTION

[0026] Embodiment 1:

[0027] First, the drawing needs to be modified to adjust the sprinkler nodes. All the sprinkler nodes on the branch line are adjusted to the standard pitch. After unifying the pitch, it meets the pre-embedding conditions, and the precast slab 1 can be made in the factory. The structure of the precast slab 1 is as shown in Figure 1 and Figure 2 . In the precast slab 1, the sleeve 2 and the junction box 3 are pre-embedded. The sleeve 2 and the junction box 3 are located at the longitudinal and transverse centers of the precast slab, but are higher than the center of the thickness of the precast slab in the thickness direction. Each end of the sleeve 2 is connected to a junction box 3. The sleeve 2 and the junction box 3 are integrally made of plastic, which can prevent cement from pouring in or be cast after connecting the tee to the pipe before pre-embedding. After the precast slab 1 is formed, there are junction boxes 3 at both ends. After two precast slabs 1 are spliced, two adjacent junction boxes 3 form a sunken wiring space. The space size meets the requirement that the branch pipe 4 of the fire water system can be inserted into the sleeve 2 without plastic deformation. The branch pipe 4 of the fire water system is a chlorinated polyvinyl chloride (PVC-C) pipe, which can be elastically bent within a certain range to be inserted into or removed from the sleeve 2. The lengths of the branch pipe 4 of the fire water system and the precast slab 1 are both standard lengths. One branch pipe 4 of the fire water system is installed in each precast slab 1. Adjacent two branch pipes are connected by a tee. The other end of the tee is used to install a sprinkler head. Since the latest version of the Design Code for Fire Protection Water Systems GB50084-2017, 8.0.4 states that the distribution pipe can use a 1.8m sprinkler hose to connect to the sprinkler head, and for the parts with a suspended ceiling, a hose can be used for connection to meet the requirements of arbitrarily adjusting the position of the sprinkler head such as equipment collision on the top surface of the suspended ceiling, and to meet the convenience of arbitrarily adjusting after the change of the suspended ceiling for secondary decoration, saving the cost of secondary renovation. This process saves supports and hangers. There is no high-altitude operation during platform operation, which can improve work efficiency, save headroom height, shorten the construction period, reduce multi-disciplinary collisions and meet the prefabrication process, reduce hole opening and plugging, and for residential or storefronts, etc., it can save the suspended ceiling and is applicable to hotel and office places to avoid collisions and increase headroom. A filter is added in front of all prefabricated embedded pipes to protect the service life of the system.

[0028] Example 2:

[0029] As shown in Figure 4 , the difference between this example and Example 1 is that the sleeve 2 and the junction box 3 are located on the central axis of the precast slab, and the structure is symmetrical in the up-down, left-right, front-back directions. In this way, the junction box 3 is a box body missing the upper and lower surfaces and the outer side surfaces. The advantage of this structure is that the precast slab 1 does not need to be divided into front and back sides, further improving the convenience of assembly.

[0030] Example 3:

[0031] The difference between this example and Example 1 is that the precast slab 1 is in the form of in-situ casting, with the whole floor cast. The steel bars are pre-arranged, and the embedded sleeves 2 and junction boxes 3 are arranged at the bottom according to the standard spacing. The sleeve 2 and the junction box 3 are integrally connected and are seamless structures to prevent cement from seeping in. Further, the junction box 3 can be designed to be closed and cut open after the casting is completed.

Claims

1. An assembled pre-embedded structure for a branch pipe of a fire water system, comprising a precast slab (1), characterized in that: Embedded sleeves (2) and junction boxes (3) are pre-embedded in the precast slab (1). The junction boxes (3) are located at both ends of the precast slab. The sleeves (2) and the junction boxes (3) are connected. The branch pipe (4) of the fire water system is installed in the sleeve (2). Two branch pipes (4) of the fire water system are connected by a tee in the junction box (3) and sprinkler heads are installed; the branch pipe (4) of the fire water system is a PVC-C pipe; both the precast slab (1) and the branch pipe (4) of the fire water system are of standard lengths. The sleeves (2) and the junction boxes (3) are located at the longitudinal and transverse centers of the precast slab, but are higher than the center of the thickness of the precast slab in the thickness direction. After two precast slabs (1) are spliced, the two junction boxes (3) form a wiring space, and the space size is such that the branch pipe (4) of the fire water system can be inserted into the sleeve (2) without undergoing plastic deformation.

2. The pre-embedded structure for the fabricated branch pipe of the fire water system according to claim 1, wherein: The sprinkler head can be connected through a hose and a tee.

3. The pre-embedded structure for the fabricated branch pipe of the fire water system according to claim 1 or 2, characterized in that: The junction box (3) is a six-sided box body missing the upper surface and one side surface.

4. The pre-embedded structure for assembling branch pipes of a fire water system according to any one of claims 1 or 2, characterized in that: The junction box (3) is a six-sided box body missing the upper surface, the lower surface and one side surface.

5. The pre-embedded structure for assembling branch pipes of the fire water system according to claim 4, characterized in that: The sleeve (2) is pre-embedded on the central axis in the length direction of the precast slab (1).

6. An assembly-type embedded method for a branch pipe of a fire water system, using the assembly-type embedded structure of the branch pipe of the fire water system as described in claim 1, characterized in that Including: A Optimize the design drawings and adjust the positions of each sprinkler node on the pipeline so that the distance between adjacent two nodes is the standard distance; B Precast the precast slab (1); C Assemble the precast slab (1); D Insert the branch pipe (4) of the fire water system and install a tee.

7. The pre-embedded method for the branch pipe of the fire water system according to claim 6, characterized in that: The precast slab (1) is cast in place, with steel bars pre-embedded and the sleeves (2) and the junction boxes (3) arranged according to the spacing. The sleeves (2) and the junction boxes (3) adopt an integrated seamless structure.

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