Drainage ditch structure located at fireproof door / wall of underground powerhouse of hydropower project

Abstract

The application discloses a drainage open ditch structure located at a fireproof door / wall of a hydropower engineering underground powerhouse, wherein the drainage open ditch below the floor of the underground powerhouse penetrates the fireproof door or the fireproof wall of the underground powerhouse, a section of a drainage pipe is arranged at the bottom of the drainage open ditch below the fireproof door or the fireproof wall along the water flow direction, the inlet end of the drainage pipe is located inside a protection unit, the outlet end of the drainage pipe is located outside the protection unit, the concrete is poured above the drainage pipe to fill the drainage open ditch, the anti-blocking grate is arranged at the end head on the upstream side of the water flow direction of the drainage pipe, and the steel smoke-retaining roller shutter device is arranged above the end head on the downstream side of the water flow direction of the drainage pipe, and the steel smoke-retaining roller shutter device is used for blocking the outlet end of the drainage pipe in case of fire. The application has the advantages of simple structure, small construction difficulty, good blocking effect, effectively eliminating the fire-fighting hidden danger in the fire-fighting engineering design, and ensuring that the open ditch drainage is not hindered in the smooth and continuous state under the two conditions of normal time and fire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building fireproof plugging, in particular to a drainage open ditch structure located at a fire door / wall of an underground powerhouse of a hydropower project. BACKGROUND

[0002] In a hydropower project, when a drainage open ditch of an underground powerhouse penetrates through a fire door or a fire wall from below the floor, no plugging measures are generally taken for continuous drainage; the cross-sectional size of the drainage open ditch is generally 300*300mm or larger, and the hole will become a route for planar fire spread and smoke diffusion in a fire, which destroys the effectiveness and integrity of the fire door / wall and leads to property loss and personal safety accidents, so appropriate fireproof plugging measures should be taken to prevent accidents, and the drainage open ditch should still be able to drain normally in a fire.

[0003] In a hydropower project, the drainage open ditch of an underground powerhouse often penetrates through the bottom of a fire door / wall, and the hole below the fire door / wall is not plugged, which destroys the effectiveness and integrity of the fire door and will cause fire spread and smoke diffusion, leading to property loss and personal safety accidents, and there is currently no effective technical measure to solve this often neglected fireproof plugging problem. SUMMARY

[0004] The present application aims to solve the technical problem of the existing drainage open ditch penetrating through a fire door / wall without any plugging measures in an underground powerhouse of a hydropower project, and provides a drainage open ditch structure located at a fire door / wall of an underground powerhouse of a hydropower project, which is simple in structure and practical and effective in fireproof plugging.

[0005] To solve the above technical problem, the present application adopts the technical scheme of a drainage open ditch structure located at a fire door / wall of an underground powerhouse of a hydropower project, a drainage open ditch below the floor of the underground powerhouse penetrates through a fire door or a fire wall of the underground powerhouse, a section of drainage pipe is arranged below the drainage open ditch at the water flow direction, the inlet end of the drainage pipe is located inside a protection unit, the outlet end of the drainage pipe is located outside the protection unit, the drainage open ditch is filled with concrete above the drainage pipe, a block grate is arranged at the end upstream of the water flow direction of the drainage pipe, and a steel smoke curtain device is arranged above the end downstream of the water flow direction of the drainage pipe, which is used for plugging the outlet end of the drainage pipe in a fire.

[0006] The inlet end and the outlet end of the drainage pipe 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 the surface layer is paved with the same decorative material as the adjacent floor.

[0008] The steel smoke curtain device is composed of a curtain plate, a guide rail, a box body, a rolling door machine and a control box, is linked with a fire automatic 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 drain pipe is made of stainless steel, is arranged in the middle of the drain open ditch bottom 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.

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

[0011] The advantages and technical effects of the present application are: the fireproof plugging structure measures are taken for the fire door / wall bottom orifice penetrated by the drain open ditch, the effectiveness and integrity of the fire door / wall function are ensured, the drain pipe ensures the smoothness of the drain open ditch when locally plugged, the smoke curtain device effectively prevents the accident smoke from spreading to the other side of the fire door / wall through the drain open ditch; the present application has simple structure, small construction difficulty, good plugging effect, provides effective protection in preventing the spread and smoke diffusion of fire accidents in the fire engineering design, and has good economic benefits in ensuring the safety of life and property. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a drain open ditch structure structure schematic view provided by the present application at the fire door / wall of a hydropower engineering underground powerhouse;

[0013] Figure 2 is an example arrangement schematic view using the present application. DETAILED DESCRIPTION

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

[0015] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

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

[0017] Thus, features that are "first", "second", and so on can explicitly or implicitly include one or more of such features. In the description of the application, unless otherwise specified or limited, the meaning of "a plurality" is two or more.

[0018] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0019] As shown in Figure 1 The drainage ditch structure of the application located at the fireproof door / wall of the underground powerhouse of the hydropower project, the drainage ditch 6 below the floor in the underground powerhouse penetrates the fireproof door 7 or the fireproof wall 8, a section of drainage pipe 1 is arranged at the bottom of the drainage ditch 6 below the fireproof door 7 or the fireproof wall 8 along the water flow direction, the inlet end of the drainage pipe 1 is located inside the protection unit 9, the outlet end of the drainage pipe 1 is located outside the protection unit 10, the concrete 2 is poured above the drainage pipe 1 to fill the drainage ditch 6, the anti-blocking grate 4 is arranged at the end upstream of the water flow direction of the drainage pipe 1, and the steel smoke curtain device 5 is arranged above the end downstream of the water flow direction of the drainage pipe 1, which is used to block the outlet end of the drainage pipe 1 in case of fire.

[0020] The positions where the inlet end and the outlet end of the drainage pipe 1 contact with 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 C20 fine stone concrete, and the surface layer is paved with the same decorative material as the adjacent floor.

[0022] The steel smoke curtain device 5 is composed of curtain plate, guide rail, box, door roller and control box, is linked with the automatic fire alarm system, and automatically rises and falls through the transmission device and the control system to play the fireproof and smokeproof function.

[0023] The drainage pipe 1 is made of stainless steel and is arranged in the middle of the ditch bottom of the drainage ditch 6 below the floor of the fireproof door / wall, 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 pipe bottom of the drainage pipe 1 is at the same elevation as the ditch bottom of the drainage ditch 6.

[0025] In this embodiment, the holes left by the drainage channel from the fireproof door floor and the local open channel should be implemented with fireproof plugging structure measures, that is, a stainless steel drainage pipe is embedded through the bottom of the drainage channel; the open channel in the cross section range occupied by the total length of the drainage pipe is filled and smoothed with C20 fine stone concrete; the gap between the pipe wall of the inlet and outlet ends of the drainage pipe and the C20 fine stone concrete is brushed with fireproof glue; a stainless steel anti-blocking grate is arranged at the upstream side of the water flow direction of the drainage pipe, and a steel smoke blocking curtain device is arranged above the outlet of the drainage pipe on the outside of the protection unit.

[0026] According to the requirements of the cross section size, drainage capacity and bearing load of the open channel, the pipe diameter of the drainage pipe 1 is not less than 150 mm; the total length of the drainage pipe is extended by not less than 1 m on both sides of the fireproof wall where each fireproof door is located; the cross section of the open channel in the range of the total length of the drainage pipe is filled and smoothed with C20 fine stone concrete 2, the C20 fine stone concrete 2 can be replaced with a hydrophobic non-combustible flexible fireproof plugging material, and then a finished open channel grate is laid, which is convenient for later disassembly, modification and maintenance; the gap between the pipe wall of the inlet and outlet ends of the drainage pipe 1 and the C20 fine stone concrete 2 is brushed with fireproof glue 3; a stainless steel anti-blocking grate 4 is arranged at the upstream side of the water flow direction of the drainage pipe 1, and a steel smoke blocking curtain device 5 is arranged above the outlet of the drainage pipe 1 on the outside 10 of the protection unit. The steel smoke blocking curtain device 5 meets the following technical requirements: (1) the overall device should reach the fire resistance limit of ≥2h; (2) the installation of the smoke curtain plate 11 and the guide rail 12 should have tightness and air tightness with the outlet end interface of the drainage pipe 1; (3) when a fire occurs, the device is linked with the smoke detector, and the smoke blocking curtain should have a limit position function of stopping when the liquid level in the drainage channel is sensed, that is, the function of automatically lowering the curtain and the liquid surface in the channel form a sealed state to prevent smoke from spreading to the inside 9 of the protection unit through the outlet end of the drainage pipe, and after the fire is eliminated, the smoke blocking curtain can also be automatically raised through the transmission device, so that the smoothness and continuity of drainage are not affected in normal times and in fire state, and the liquid is prevented from overflowing out of the drainage channel and polluting the ground, causing the danger of slipping of the escaping personnel in emergency.

[0027] As shown in Figure 2 The application is applied to the smoke-proof stairwell and elevator room combined anteroom position of a conventional water and electricity engineering underground powerhouse, the open channel arranged on the floor penetrates the fireproof door of the smoke-proof stairwell and the fireproof wall of the elevator combined anteroom below the floor, if not plugged, the smoke-proof function of the stairwell and the combined anteroom will be invalid due to the design wind pressure of the ventilation professional in the combined anteroom not meeting the standard, the positive pressure air supply system being invalid and other reasons, which seriously threatens the escape of the on-site personnel.

[0028] Through the Figure 2The two node problems of the example are processed by the above-mentioned technology, effectively prevent the accident smoke from entering the stairwell and the elevator lobby through the hole, guarantee the effectiveness and integrity of the fire door and the fire wall function, ensure the technical conditions required by the ventilation profession, ensure the smoothness of the drainage when the local drainage ditch is blocked, and have wide guiding and promoting significance for solving such engineering problems.

[0029] The above-described embodiments are only used to illustrate the technical ideas and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and the patent range of the present application cannot be limited by the above-described embodiments, that is, any equivalent changes or modifications made according to the spirit disclosed by the present application still fall within the patent range of the present application.

Claims

1. A drainage ditch structure located at the fire door / wall of an underground powerhouse in a hydropower project, wherein the drainage ditch (6) located below ground level in the underground powerhouse penetrates the fire door (7) or firewall (8), characterized in that, A section of drainage pipe (1) is installed at the bottom of the drainage ditch (6) located below the fire door (7) or firewall (8) along the direction of water flow. The inlet end of the drainage pipe (1) is located inside the 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 drainage ditch (6). A grate (4) is installed at the upstream end of the drainage pipe (1) in the direction of water flow. A steel smoke-blocking roller shutter device (5) is installed above the downstream end of the drainage pipe (1) in the direction of water flow. The steel smoke-blocking roller shutter device (5) is used to block the outlet end of the drainage pipe (1) in case of fire. The inlet and outlet ends of the drain pipe (1) are coated with fireproof adhesive (3) to seal the gap between the drain pipe (1) and the concrete (2). The steel smoke-blocking roller shutter device (5) consists of a curtain panel, guide rail, housing, roller shutter motor and control box. It is linked with the automatic fire alarm system and automatically rises and falls through the transmission device and control system to play the role of fire prevention and smoke prevention. When a fire occurs, the steel smoke-blocking roller shutter device (5) is linked with the smoke detector. When the smoke-blocking roller shutter falls, it should have a limit function that stops when it senses the height of the liquid level in the drainage ditch. Its function is to automatically lower the roller shutter and form a sealed state with the liquid surface in the ditch to prevent smoke from spreading to the inside of the protection unit (9) through the outlet end of the drainage pipe.

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

3. The drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to claim 1, characterized in that, The drainage pipe (1) is made of stainless steel and is centrally located at the bottom of the drainage ditch 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.

4. The drainage ditch structure located at the fire door / wall of the underground powerhouse of a hydropower project according to any one of claims 1-3, characterized in that, The bottom of the drainage pipe (1) is at the same elevation as the bottom of the drainage ditch (6).

Images