Fire protection construction for hot cast anchor nodes

Abstract

The application relates to the technical field of building cable structure, and discloses a fireproof protection structure of a hot-cast anchor node, which comprises a pre-buried part, a plurality of groups of connectors equidistantly arranged at the outer end of a hoop, a steel pipe sleeve connected to the side surface of the pre-buried part, the steel pipe sleeve being in multi-section installation, through bolts being connected with the connectors at the corresponding connectors, a plurality of recesses being arranged at the outer end surface of the steel pipe sleeve corresponding to the bolts, a cover plate surface being horizontal to the outer end surface of the steel pipe sleeve, and a fireproof layer being arranged at the outer end of the steel pipe sleeve. In the case of fire, the expanded fireproof coating expands and foams to present an endothermic reaction, consumes the heat during combustion, and forms a foam layer with loose texture, which can delay the speed of heat transfer. When the node is heated to a pre-warning value after the failure of the fireproof coating, an intelligent water pump is started to draw water in a water tank to the inside of a metal pipe, the surrounding metal pipe can absorb the heat in the inside of the steel pipe sleeve, and then the fire-fighting nozzles at the water outlets spray out, so that further fireproof effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of building cable structure technology, specifically to a fire-resistant structure for a hot-cast anchor node. Background Technology

[0002] Large-span spatial structures pose certain fire hazards. Hot-cast anchor joints, due to the low melting point of the casting, become weak points in the structure's fire resistance. While fire-retardant coatings can be directly applied to the anchor cup surface for protection, if the cables are not fire-protected, heat will reach the joints through heat transfer, leading to joint failure. The cable surface is not smooth enough; applying fire-retardant coating directly to the cable surface may result in uneven application and poor coating adhesion, affecting its fire resistance. Currently, there is a lack of fire protection structures for hot-cast anchor joints in China that consider partial cable protection. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a fire-resistant structure for hot-cast anchor nodes, which has advantages such as excellent fire resistance and fire protection during stirring.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fireproof protection structure for a hot-cast anchor node, comprising an embedded part, an installation seat installed at the middle of the side of the embedded part, a hot-cast anchor cup connected to the middle of the side of the installation seat, a cable connected inside the hot-cast anchor cup, a ring hoop connected to the outer end of the hot-cast anchor cup and the outer end of the cable by fastening bolts, multiple sets of connectors equidistantly spaced at the outer end of the ring hoop, a steel pipe sleeve connected to the side of the embedded part, the steel pipe sleeve being installed in multiple sections, with through bolts connecting to the connectors at corresponding connector locations, multiple sets of recesses at the corresponding bolt locations on the outer end face of the steel pipe sleeve, and a cover plate connected to the recesses, the surface of the cover plate being horizontal to the outer end face of the steel pipe sleeve, a fireproof layer provided on the outer end of the steel pipe sleeve, and a spray structure provided inside the steel pipe sleeve.

[0007] Preferably, a set of symmetrical limiting plates is added to the end of the steel pipe sleeve, and the edge of the limiting plate where they fit together is provided with a through hole corresponding to the cable. Fixing the limiting plate to the end of the steel pipe sleeve can effectively ensure the stability of the cable.

[0008] Preferably, the number of the rings is at least two. The rings are wrapped around and fitted to the cable and the hot-cast anchor cup by fastening bolts. The preload of the fastening bolts is sufficient. The material of the rings is not limited to 304 stainless steel, but can be replaced by any material with strong deformation performance and excellent high temperature resistance. The preload of the fastening bolts is sufficient to ensure that the relaxation rate does not exceed 50% at the warning temperature, which can effectively ensure the stability of the rings.

[0009] Preferably, the number of connectors is four, and the angle between the axes of each connector is 90 degrees. The connectors are set perpendicular to the inner wall of each steel pipe sleeve. At the same time, the ring can effectively stabilize the cable and reduce its deflection inside the steel pipe sleeve, thereby ensuring that the steel pipe sleeve is not easily deformed.

[0010] Preferably, the cover plate is embedded in the recess at the outer end of the cover plate, and the steel pipe sleeve and the embedded part are welded together. Embedding the cover plate on the surface of the steel pipe sleeve and installing it in the recess not only ensures that the bolts are less likely to circulate with the outside air, thus avoiding bolt corrosion and providing a guarantee for future replacement of internal components, but also ensures that the surface of the steel pipe sleeve is level, so that the fireproof layer can be evenly attached to the outer surface of the steel pipe sleeve.

[0011] Preferably, the fireproof layer can be made by uniformly spraying a fireproof coating onto all outward-facing surfaces of the steel pipe sleeve and cover plate, and the fireproof layer can be replaced by a fireproof board or a flexible felt-like fireproof material.

[0012] Preferably, the sprinkler structure consists of a metal pipe and a fire sprinkler head. The metal pipe is fixedly installed on the inner wall of the steel pipe sleeve. The inlet of the metal pipe is connected to the water tank and passes through the steel pipe sleeve. The outlet of the metal pipe passes through the steel pipe sleeve and a fire sprinkler head is fixedly installed at the end of the outlet. The metal pipe bends around the inner wall of the steel pipe sleeve and fits against each inner wall of the steel pipe sleeve.

[0013] Preferably, a smart water pump is connected to the water inlet, and a thermocouple is provided at the connection node between the cable and the hot-cast anchor cup, and the thermocouple and the smart water pump are electrically connected.

[0014] Compared with the prior art, the present invention provides a fire-resistant protection structure for hot-cast anchor nodes, which has the following beneficial effects:

[0015] 1. When the outside temperature is high, the fireproof layer ensures that the temperature is not transferred quickly, thus maintaining the temperature of the hot-cast anchor cups and cables inside the steel pipe casing. At the same time, in the event of a fire, the intumescent fireproof coating expands and foams, exhibiting an endothermic reaction, consuming the heat generated during combustion. The resulting foam layer is loose in texture and has good heat insulation properties, which can slow down the rate of heat transfer. When the fireproof coating fails and the temperature rises to the warning value at the node, the thermocouple detects the temperature rise in time and starts the intelligent water pump, drawing water from the water tank into the metal pipe. At the same time, the surrounding metal pipe can absorb the heat inside the steel pipe casing, and then spray it out from the fire sprinkler head at the outlet, thus achieving a further fireproof effect. Attached Figure Description

[0016] Figure 1 This is an exploded view of the structure of the present invention;

[0017] Figure 2This is a schematic diagram of the installation process of the structure of the present invention;

[0018] Figure 3 This is a detailed view of the cable retaining ring of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection between the bolt cover plate and the present invention.

[0020] Figure 5 This is a bottom-view explosion diagram of the structure of the present invention;

[0021] Figure 6 This is a side-view perspective of the structure of the present invention.

[0022] The components include: 1. Embedded parts; 2. Mounting base; 3. Hot-cast anchor cup; 4. Steel pipe sleeve; 5. Bolt; 6. Cover plate; 7. Fireproof layer; 8. Metal pipe; 9. Ring hoop; 10. Limiting plate; 11. Cable; 12. Fire sprinkler head; 13. Water inlet; 14. Connector; 15. Fastening bolt. Detailed Implementation

[0023] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0024] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Please see Figure 1-6A fireproof protection structure for a hot-cast anchor node includes an embedded part 1, an mounting base 2 installed at the middle of the side of the embedded part 1, a hot-cast anchor cup 3 connected to the middle of the side of the mounting base 2, a cable 11 connected inside the hot-cast anchor cup 3, a ring 9 connected to the outer end of the hot-cast anchor cup 3 and the outer end of the cable by fastening bolts 15, a plurality of connectors 14 equidistantly spaced at the outer end of the ring 9, a steel pipe sleeve 4 connected to the side of the embedded part 1, the steel pipe sleeve 4 being installed in multiple sections, a through bolt 5 connecting to the connector 14 at the corresponding connector 14, a plurality of recesses at the outer end of the steel pipe sleeve 4 corresponding to the bolts 5, and a cover plate 6 connected to the recesses, a fireproof layer 7 provided at the outer end of the steel pipe sleeve 4, and a spray structure provided inside the steel pipe sleeve 4.

[0027] Furthermore, a set of symmetrical limiting plates 10 are added to the end of the steel pipe sleeve 4. The edge of the limiting plates 10 where they fit together is provided with a through hole corresponding to the cable 11. Fixing the limiting plates 10 to the end of the steel pipe sleeve 4 can effectively ensure the stability of the cable 11.

[0028] Furthermore, firstly, corresponding size rings 9 are installed on the hot-cast anchor cup 3 and the cable 11 respectively, ensuring that there are no less than two rings 9, determined according to the length of the protected section. The preload of the fastening bolts 15 is sufficient to ensure that the relaxation rate does not exceed 50% at the warning temperature, which can effectively ensure the stability of the rings 9. The material of the rings 9 is not limited to 304 stainless steel, but can also be replaced by any material with strong deformation performance and excellent high temperature resistance. At the same time, the rings 9 can effectively stabilize the cable 11 and reduce its deflection inside the steel pipe sleeve 4, thereby ensuring that the steel pipe sleeve 4 is not easily deformed.

[0029] Furthermore, there are four connectors 14, and the angle between the axes of each connector 14 is maintained at ninety degrees. The connectors 14 are set perpendicular to the inner wall of each steel pipe sleeve 4, which can better ensure the connection between the cable 11 and the steel pipe sleeve 4, thereby ensuring that the steel pipe sleeve 4 can well wrap the cable 11.

[0030] Furthermore, the cover plate 6 is embedded in the recess at the outer end of the cover plate 6. The steel pipe sleeve 4 and the embedded part 1 are welded together. The embedded installation of the cover plate 6 on the surface of the steel pipe sleeve 4 and the recess not only ensures that the bolt 5 is less likely to circulate with the outside air, avoiding the corrosion of the bolt 5 and providing a guarantee for the replacement of internal components in the future, but also ensures that the surface of the steel pipe sleeve 4 is level, so that the fireproof layer 7 can be evenly attached to the outer surface of the steel pipe sleeve 4.

[0031] The fireproof layer 7 can be made by uniformly spraying a fireproof coating on all outward-facing surfaces of the steel pipe sleeve 4 and the cover plate, and the fireproof layer 7 can be replaced by a fireproof board or a flexible felt-like fireproof material.

[0032] Furthermore, the sprinkler structure consists of a metal pipe 8 and a fire sprinkler head 12. The metal pipe 8 is fixedly installed on the inner wall of the steel pipe sleeve 4. The inlet 13 of the metal pipe 8 is connected to the water tank and passes through the steel pipe sleeve 4. The outlet of the metal pipe 8 passes through the steel pipe sleeve, and a fire sprinkler head 12 is fixedly installed at the end of the outlet. The metal pipe 8 bends around the inner wall of the steel pipe sleeve 4 and fits snugly against each inner wall of the steel pipe sleeve 4. A smart water pump is connected to the inlet 13. A thermocouple is installed at the connection point between the cable 11 and the hot-cast anchor cup 3. The thermocouple and the smart water pump are electrically connected. In cases of high external temperature, the fireproof layer 7 ensures that the temperature is difficult to transfer quickly. This ensures the temperature of the hot-cast anchor cup 3 and cable 11 inside the steel pipe sleeve 4. In the event of a fire, the intumescent fireproof coating expands and foams, exhibiting an endothermic reaction that consumes the heat generated during combustion. The resulting foam layer is loosely textured and has good heat insulation properties, which can slow down the rate of heat transfer. When the fireproof coating fails and the temperature at the node rises to the warning value, the thermocouple detects the temperature rise in time and starts the intelligent water pump to draw water from the water tank into the metal pipe 8. At the same time, the surrounding metal pipe 8 can absorb the heat inside the steel pipe sleeve 4, and then spray it out from the fire sprinkler head 12 at the outlet, thereby achieving a further fireproof effect.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire protection arrangement for a hot cast anchor node, characterized by: The utility model provides a kind of pre-embedded part (1), the pre-embedded part (1) side middle end is equipped with mounting seat (2), the mounting seat (2) side middle end is connected with hot cast anchor cup (3), the hot cast anchor cup (3) inside is connected with cable (11), the hot cast anchor cup (3) outer end and cable outer end are connected with ring hoop (9) by fastening bolt (15), the ring hoop (9) outer end is equidistant with multiple groups of connectors (14), the pre-embedded part (1) side is connected with steel pipe sleeve (4), the steel pipe sleeve (4) is multi-section installation, at corresponding connector (14) place, bolt (5) is connected with connector (14) through, the steel pipe sleeve (4) outer end face exists multiple recesses at corresponding bolt (5) place, and recess is connected with cover plate (6), the cover plate (6) surface is horizontal with steel pipe sleeve (4) outer end face, the steel pipe sleeve (4) outer end is provided with fireproof layer (7), the steel pipe sleeve (4) inside is provided with spray structure.

2. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The steel pipe sleeve (4) is additionally provided with a group of symmetrical limit plates (10) at the end, and a through hole corresponding to the cable (11) is formed in the edge of the abutted limit plates (10).

3. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The number of the ring hoop (9) is at least two, and the ring hoop (9) is wrapped around the cable (11) and the hot cast anchor cup (3) by the fastening bolt (15), the pre-tightening force of the fastening bolt (15) is sufficient, and the material of the ring hoop (9) is a material with strong deformation performance and excellent high-temperature resistance.

4. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The number of the connector (14) is four, and the angle between the axes of the connectors (14) is kept at ninety degrees, and the connector (14) is vertically arranged with the inner wall of each steel pipe sleeve (4).

5. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The cover plate (6) is embeddedly installed in the recess at the outer end of the cover plate (6), and the steel pipe sleeve (4) and the pre-embedded part (1) are in a welded relationship.

6. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The fireproof layer (7) is evenly sprayed on all the outward surfaces of the steel pipe sleeve (4) and the cover plate by using a fireproof coating, and the fireproof layer (7) can be replaced by a fireproof plate or a flexible felt-shaped fireproof material.

7. A fire protection arrangement for a hot cast anchor node according to claim 1, characterized in that: The spray structure is composed of a metal pipe (8) and a fire sprinkler (12), the steel pipe sleeve (4) is fixedly installed with the metal pipe (8) on the inner wall, the water inlet (13) of the metal pipe (8) is connected to a water tank, the water inlet (13) penetrates the steel pipe sleeve (4), the water outlet of the metal pipe (8) penetrates the steel pipe sleeve, and the fire sprinkler (12) is fixedly installed at the end of the water outlet, the metal pipe (8) is wrapped and bent on the inner wall of the steel pipe sleeve (4), and is abutted with each inner wall of the steel pipe sleeve (4).

8. A fire protection arrangement for a hot cast anchor node according to claim 7, characterized in that: An intelligent water pump is connected at the water inlet (13), a thermocouple is arranged at the connecting joint of the cable (11) and the hot cast anchor cup (3), and the thermocouple and the intelligent water pump are electrically connected.

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