Drainage open trench structure located at fireproof door / wall of underground powerhouse of water-power engineering

Abstract

The invention discloses a drainage open trench structure located at a fireproof door / wall of an underground powerhouse of hydropower engineering, a drainage open trench located below a terrace in the underground powerhouse penetrates through the fireproof door or the fireproof wall of the underground powerhouse, and a section of drainage pipe is arranged at the bottom of the drainage open trench located below the fireproof door or the fireproof wall along the water flow direction. An inlet end of the drainage pipe is located on the inner side of the protection unit, an outlet end of the drainage pipe is located on the outer side of the protection unit, concrete is poured above the drainage pipe to fill and level up the drainage open trench, an anti-blocking grate is arranged at the end of the upstream side of the drainage pipe in the water flow direction, and a steel smoke blocking roller shutter device is arranged above the end of the downstream side of the drainage pipe in the water flow direction. The steel smoke blocking roller shutter device is used for blocking the outlet end of the drainage pipe in fire. The structure is simple, the construction difficulty is small, the blocking effect is good, fire protection hidden dangers are effectively eliminated in fire protection engineering design, and it is guaranteed that smooth and continuous drainage of the open trench is not hindered at ordinary times in the fire disaster state or in the fire disaster state.

Description

Technical Field

[0001] The invention relates to the technical field of building fireproof blocking, and in particular to an open drainage ditch structure located at a fireproof door / wall of an underground plant in a hydropower project. Background Art

[0002] When the open drainage ditch of the underground plant in the hydropower project passes through the fire door or the fire wall floor, generally no blocking measures are taken for continuous drainage; the cross-sectional size of the open drainage ditch is generally 300X300mm or larger. In the event of a fire, this opening will form a path for the spread of fire and smoke in a plane, destroying the effectiveness and integrity of the fire door / wall, and causing property loss and personal safety accidents. Therefore, appropriate fire blocking measures should be taken to prevent accidents before they happen, and ensure that the open drainage ditch can still drain normally under fire conditions.

[0003] In hydropower projects, underground powerhouses often encounter open drainage ditches running through the bottom of fire doors / walls, while the openings under the fire doors / walls are not blocked, which undermines the effectiveness and integrity of the fire doors. There is a risk of fire spreading and smoke diffusion, leading to property losses and personal safety accidents. At present, there are no effective technical measures to solve this often overlooked fire blocking problem. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an open drainage ditch structure located at the fire door / wall of the underground powerhouse of the hydropower project, which is a simple, practical and effective fire-proof blocking structure, in view of the technical defect that no sealing measures are taken when the existing open drainage ditch in the underground powerhouse of the hydropower project passes through the fire door / wall.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an open drainage ditch structure located at the fire door / wall of an underground plant of a hydropower project, the open drainage ditch located below the ground in the underground plant runs through the fire door or fire wall of the underground plant, a section of drainage pipe is arranged at the bottom of the open drainage ditch below the fire door or fire wall along the water flow direction, the inlet end of the drainage pipe is located on the inner side of the protection unit, and the outlet end of the drainage pipe is located on the outer side of the protection unit, concrete is poured above the drainage pipe to fill the open drainage ditch, an anti-blocking grate is arranged at the end on the upstream side of the water flow direction of the drainage pipe, and a steel smoke curtain device is arranged above the end on the downstream side of the water flow direction of the drainage pipe, and the steel smoke curtain device is used to block the outlet end of the drainage pipe in case of fire.

[0006] The positions where the inlet end and the outlet end of the drainage pipe contact the concrete are coated with fireproof glue for sealing the gap between the drainage pipe and the concrete.

[0007] The concrete is C20 fine stone concrete, and its surface layer is paved with the same decorative material as the adjacent floor.

[0008] The steel smoke barrier rolling curtain device is composed of a curtain plate, a guide rail, a box body, a rolling door machine and a control box. It is linked with the automatic fire alarm system and automatically rises and falls through a transmission device and a control system to play a fire and smoke prevention function.

[0009] The drainage pipe is made of stainless steel and is centrally arranged at the bottom of the open drainage ditch below the fire door / wall floor. The inlet end is at least 1m inside the protection unit, and the outlet end is at least 1m outside the protection unit.

[0010] The bottom of the drainage pipe is at the same elevation as the bottom of the open drainage ditch.

[0011] The advantages and technical effects of the present invention are as follows: by taking fireproof blocking structural measures for the bottom openings of the fire doors / walls penetrated by the open drainage ditch, the effectiveness and integrity of the fire doors / wall functions are guaranteed, the drainage pipe ensures the smooth flow of the open drainage ditch when it is partially blocked, and the smoke barrier roller shutter device effectively prevents accident smoke from spreading to the other side of the fire door / wall through the open drainage ditch; the present invention has a simple structure, low construction difficulty, and good blocking effect. It provides effective protection in preventing the spread of fire accidents and the spread of smoke in fire protection engineering design, and has good economic benefits in protecting the safety of life and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the open drainage ditch structure provided by the present invention, located at the fire door / wall of the underground powerhouse of the hydropower project;

[0013] Figure 2 Schematic diagram of the example layout of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0016] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0017] Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0018] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0019] like Figure 1 As shown, the present invention provides an open drainage ditch structure located at the fire door / wall of an underground powerhouse of a hydropower project, wherein an open drainage ditch 6 located below the ground in the underground powerhouse runs through a fire door 7 or a fire wall 8 of the underground powerhouse, a section of a drainage pipe 1 is arranged at the bottom of the open drainage ditch 6 located below the fire door 7 or the fire wall 8 along the water flow direction, the inlet end of the drainage pipe 1 is located at the inner side 9 of the protection unit, and the outlet end of the drainage pipe 1 is located at the outer side 10 of the protection unit, concrete 2 is poured above the drainage pipe 1 to fill the open drainage ditch 6, an anti-blocking grate 4 is arranged at the end on the upstream side of the water flow direction of the drainage pipe 1, and a steel smoke curtain device 5 is arranged above the end on the downstream side of the water flow direction of the drainage pipe 1, and the steel smoke curtain device 5 is used to block the outlet end of the drainage pipe 1 in case of fire.

[0020] The positions where the inlet and outlet ends of the drainage pipe 1 contact the concrete 2 are coated with fireproof glue 3 for sealing the gap between the drainage pipe 1 and the concrete 2 .

[0021] The concrete 2 is made of C20 fine stone concrete, and its surface layer is paved with the same decorative material as the adjacent floor.

[0022] The steel smoke barrier rolling curtain device 5 is composed of a curtain plate, a guide rail, a box body, a rolling door machine and a control box. It is linked with the automatic fire alarm system and automatically rises and falls through a transmission device and a control system to play a fire and smoke prevention function.

[0023] The drainage pipe 1 is made of stainless steel and is centrally arranged at the bottom of the open drainage ditch 6 below the fire door / wall floor. The inlet end is located at least 1m inside the protection unit, and the outlet end is located at least 1m outside the protection unit.

[0024] The bottom of the drainage pipe 1 is at the same elevation as the bottom of the open drainage ditch 6 .

[0025] In this embodiment, the holes and local open ditches left when the open drainage ditch passes through below the fire door floor should implement fire-proof blocking structural measures, that is, a stainless steel drainage pipe is buried at the bottom of the drainage ditch; the open drainage ditch within the cross-sectional area occupied by the total length of the drainage pipe is filled and smoothed with C20 fine stone concrete; fire-retardant glue is brushed on the gap between the pipe wall at the inlet and outlet ends of the drainage pipe and the C20 fine stone concrete; a stainless steel anti-blocking grate is set at the upstream side of the drainage pipe in the water flow direction, and a steel smoke barrier curtain device is set above the mouth of the drainage pipe on the outside of the protection unit.

[0026] According to the requirements of the cross-sectional size, drainage volume and load-bearing of the open drainage ditch, the diameter of the drainage pipe 1 shall not be less than 150 mm; the total length of the drainage pipe shall extend for not less than 1 m on both sides of the firewall where the fire doors are located in each direction; the cross-sectional area of ​​the open drainage ditch within the total length of the drainage pipe is filled and smoothed with C20 fine stone concrete 2, and the C20 fine stone concrete 2 can be replaced with hydrophobic, non-combustible, flexible fire-proof plugging material, and then the finished open ditch grate is laid to facilitate later dismantling and maintenance; fire-retardant glue 3 is brushed on the gap between the pipe wall at the inlet and outlet ends of the drainage pipe 1 and the C20 fine stone concrete 2; a stainless steel anti-blocking grate 4 is arranged at the upstream side of the drainage pipe 1 in the water flow direction, and a steel smoke barrier roller shutter device 5 is arranged above the mouth of the drainage pipe 1 in the outer direction 10 of the protection unit. The steel smoke curtain device 5 meets the following technical requirements: (1) The overall device should have a fire resistance limit of ≥2h; (2) The installation of the smoke curtain plate 11 and the guide rail 12 and the interface sealing of the outlet end of the drainage pipe 1 should be tight and airtight; (3) When a fire occurs, the device is linked with the smoke detector, and the smoke curtain should have a limit function when it senses the height of the liquid level in the drainage ditch. Its function is to automatically descend and form a sealing state with the liquid surface in the ditch to prevent smoke from spreading through the outlet end of the drainage pipe to the inside 9 of the protection unit. After the fire is extinguished, the smoke curtain can automatically rise through the transmission device, so as to achieve the goal of not hindering the smooth and continuous drainage in normal times and fire conditions, and avoid the risk of liquid overflowing from the drainage ditch due to blockage in the fire state and polluting the ground, causing the danger of escaping personnel slipping in an emergency.

[0027] like Figure 2 As shown, the present invention is applied to the smoke-proof stairwell and elevator common vestibule of an underground plant of a conventional hydropower project. The open drainage ditch arranged on this floor passes through the fire door of the smoke-proof stairwell and the fire partition wall of the elevator common vestibule below the floor. If it is not blocked, the smoke-proof function of the stairwell and the common vestibule will fail due to reasons such as the design wind pressure of the ventilation professional in the common vestibule not meeting the standard and the failure of the positive pressure air supply system, posing a serious threat to the escape of on-site personnel.

[0028] Through Figure 2The above-mentioned technical treatments for the two node problems in the example effectively prevented accident smoke from entering the common vestibule of the stairwell and elevator room through the holes, ensured the effectiveness and integrity of the fire doors and fire partitions, ensured the technical conditions required by the ventilation profession, and ensured the smooth drainage when the open drainage ditch was partially blocked, which has broad guiding and promotion significance for solving such engineering problems.

[0029] The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A drainage ditch structure located at the fire door / wall of an underground powerhouse of a hydropower project, wherein the drainage ditch (6) located below the floor of the underground powerhouse passes through the fire door (7) or the fire wall (8), characterized in that: A section of drainage pipe (1) is arranged at the bottom of an open drainage ditch (6) located below a fire door (7) or a fire wall (8) along the water flow direction, the inlet end of the drainage pipe (1) is located inside a protection unit (9), and the outlet end of the drainage pipe (1) is located outside the protection unit (10). Concrete (2) is poured above the drainage pipe (1) to fill the open drainage ditch (6). An anti-blocking grate (4) is arranged at the end of the drainage pipe (1) on the upstream side in the water flow direction, and a steel smoke curtain device (5) is arranged above the end of the drainage pipe (1) on the downstream side in the water flow direction. The steel smoke curtain device (5) is used to block the outlet end of the drainage pipe (1) in the event of a fire.

2. The open drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to claim 1 is characterized in that: The positions where the inlet end and the outlet end of the drainage pipe (1) contact the concrete (2) are coated with fireproof glue (3) for sealing the gap between the drainage pipe (1) and the concrete (2).

3. The open drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to claim 1 is characterized in that: The concrete (2) is C20 fine stone concrete, and its surface layer is paved with the same decorative material as the adjacent floor.

4. The open drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to claim 1 is characterized in that: The steel smoke-blocking rolling curtain device (5) is composed of a curtain plate, a guide rail, a box body, a rolling door machine and a control box, and is linked with the automatic fire alarm system, and is automatically raised and lowered through a transmission device and a control system to play a fire and smoke prevention function.

5. The open drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to claim 1 is characterized in that: The drainage pipe (1) is made of stainless steel and is centrally arranged at the bottom of the open drainage ditch below the fire door / wall floor, with the inlet end being located at least 1m inside the protection unit and the outlet end being located at least 1m outside the protection unit.

6. The open drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to any one of claims 1 to 5, characterized in that: The bottom of the drainage pipe (1) is at the same elevation as the bottom of the open drainage ditch (6).

Images