Connection structure of staircase vertical pressurization air supply system

Abstract

The utility model belongs to the technical field of ventilation and smoke exhaust engineering, and provides a connection structure of a staircase vertical pressurization air supply system, which comprises a pressurization air supply shaft, a vertical air pipe, a shutter air supply outlet and at least two pressurization air feeders, the vertical air pipe is arranged in the pressurized air supply shaft, and the two ends of the vertical air pipe are communicated with air outlets of the two pressurized air feeders respectively; the shutter air supply outlet is formed in the staircase and communicates with the vertical air pipe. According to the structure, the two ends of the vertical air pipe are each provided with one pressurization air feeder, the two pressurization air feeders supply air at the same time, the upper pressurization air feeder supplies air to the upper floor, and the lower pressurization air feeder supplies air to the lower floor; under the condition of the same condition, the area of the vertical air pipe can be reduced to half of the original area, so that the occupied area of the pressurized air supply shaft is reduced, the shared area can be reduced, the effective usable area of a building is increased, the manufacturing cost is saved, and the building quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation and smoke exhaust engineering, and particularly relates to a connection structure of a vertical pressurized air supply system for a stairwell. Background Art

[0002] According to the requirements of the Technical Standard for Building Smoke Prevention and Exhaust Systems GB51251-2017, mechanical pressurized air supply systems need to be installed in stairwells that do not meet the conditions for natural ventilation and smoke prevention. The mechanical pressurized air supply system needs to be equipped with a fan to take air from the outside through a duct, then pressurize the air through the fan, and send it to the stairwell that needs pressurized air supply through a duct air valve, a vertical duct (installed in a vertical air shaft), and a single-layer louvered air outlet.

[0003] The required pressurized air supply volume for stairwells is often large, resulting in the vertical ducts and air shafts occupying a large area of the building's core tube. Taking a stairwell with a pressurized air supply volume of 34000 m 3 / h as an example, when the vertical duct air velocity is 15 m / s, the required area of the vertical duct is 0.63 m 2 , and thus the required area of the civil air shaft is about 1 m 2 or more, occupying a large common area and affecting the effective usable area of the building. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a connection structure of a vertical pressurized air supply system for a stairwell, which can solve the problem that the air shaft of the mechanical pressurized air supply system for the stairwell occupies a large area.

[0005] To achieve the above object, the utility model adopts the following technical solutions: a connection structure of a vertical pressurized air supply system for a stairwell, including a pressurized air supply well, a vertical duct, a louvered air outlet, and at least two pressurized air supply fans;

[0006] The vertical duct is arranged in the pressurized air supply well, and both ends of the vertical duct are respectively communicated with the air outlets of the two pressurized air supply fans;

[0007] The louvered air outlet is arranged in the stairwell, and the louvered air outlet is communicated with the vertical duct.

[0008] Preferably, it further includes a horizontal duct. Both ends of the vertical duct are communicated with the horizontal duct, and the two pressurized air supply fans are respectively arranged on the two horizontal ducts.

[0009] Preferably, a duct air valve is arranged on the horizontal duct, and the duct air valve is located between the pressurized air supply fan and the vertical duct.

[0010] Preferably, the duct air valve is a 70°C fire damper.

[0011] Preferably, the vertical air duct extends from the first floor to the top floor.

[0012] Preferably, the two pressurized air supply fans are respectively located on the first floor and the top floor.

[0013] Preferably, one louvered air supply opening is provided for every two floors.

[0014] Preferably, one louvered air supply opening is provided for every three floors.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. A connection structure of a vertical pressurized air supply system for a staircase provided by the present utility model, by arranging one pressurized air supply fan at each end of the vertical air duct, and simultaneously supplying air through the two pressurized air supply fans. The upper pressurized air supply fan supplies air to the upper floors, and the lower pressurized air supply fan supplies air to the lower floors. Under the same conditions, the area of the vertical air duct can be reduced to half of the original, thereby reducing the floor area occupied by the pressurized air supply shaft, and at the same time, the shared area can be reduced, the effective usable area of the building can be increased, the construction cost can be saved, and the quality of the building can be improved. Description of the Drawings

[0017] Figure 1 It is a schematic connection structure diagram of a connection structure of a vertical pressurized air supply system for a staircase provided by an embodiment of the present utility model.

[0018] In the drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Horizontal air duct; 2. Pressurized air supply fan; 3. Air valve; 4. Vertical air duct; 5. Pressurized air supply shaft; 6. Louvered air supply opening. Detailed Embodiment

[0020] The following further detailed description of the present utility model is provided in conjunction with specific embodiments, so that those skilled in the art can understand the present utility model more clearly.

[0021] It should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" in the terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For those of ordinary skill in the art, the specific meanings of such terms in the present utility model can be understood according to specific situations.

[0022] Embodiment 1

[0023] A connection structure of a vertical pressurized air supply system for a staircase includes a pressurized air supply shaft 5, a vertical air duct 4, a louvered air supply opening 6, and two pressurized air supply fans 2.

[0024] The pressurized air supply shaft 5 is a civil engineering air shaft, and the pressurized air supply shaft 5 extends from the first floor to the top floor. The vertical air duct 4 is arranged in the pressurized air supply shaft 5, and the vertical air duct 4 extends from the first floor to the top floor.

[0025] Two of the pressurized air supply fans 2 are respectively arranged on the first floor and the top floor. The air outlet of the pressurized air supply fan 2 on the first floor is communicated with the bottom end of the vertical air duct 4, and the air outlet of the pressurized air supply fan 2 on the top floor is communicated with the top end of the vertical air duct 4. The air inlets of the two pressurized air supply fans 2 both extend to the outside of the building, and fresh air can be inhaled from the outside.

[0026] The louver air supply outlet 6 is arranged in the stairwell, and the louver air supply outlet 6 is communicated with the vertical air duct 4. One louver air supply outlet 6 is provided for every two or three floors, so that the purpose of supplying air to each floor of the stairwell can be achieved.

[0027] Based on the above structure, when pressurized air supply to the stairwell is required, the two pressurized air supply fans 2 can be started simultaneously. The two pressurized air supply fans 2 take air from the outside at the same time and then send it into the vertical air duct 4. The pressurized air supply fan 2 on the top floor supplies air to the upper floors, and the pressurized air supply fan 2 on the first floor supplies air to the lower floors. Under the same conditions, the area of the vertical air duct can be reduced to half of the original, thereby reducing the floor area occupied by the pressurized air supply shaft, reducing the common area, increasing the effective usable area of the building, saving costs and improving the quality of the building.

[0028] For example, when the total number of floors is 10, the traditional air supply system is to set one air supply fan on the top floor, and then this air supply fan inhales fresh air from the outside, pressurizes and conveys it to the vertical air duct, and pressurized air supply is carried out to the 10 floors through the vertical air duct, so the diameter of the vertical air duct is relatively large.

[0029] In this embodiment, the air sent by the pressurized air supply fan 2 on the first floor into the vertical air duct 4 can be blown out through the louver air supply outlets 6 in the 1st - 5th floors, and the air sent by the pressurized air supply fan 2 on the top floor into the vertical air duct 4 can be blown out from the louver air supply outlets 6 in the 6th - 10th floors. It is equivalent that a single pressurized air supply fan only needs to meet the purpose of pressurized air supply for 5 floors, rather than a traditional single pressurized air supply fan directly carrying out pressurized air supply for 10 floors.

[0030] In this way, the area of the vertical air duct can be reduced to half of the original, thereby reducing the floor area occupied by the pressurized air supply shaft. For example, when the pressurized air supply volume is 34000m 3 / h, taking the air velocity of the vertical air duct as 15m / s, through calculation, the area of the vertical air duct required for the traditional air supply system is 0.63m 2 , and then the area of the civil engineering air shaft required is about 1m 2 or more.

[0031] By adopting the air supply system of this embodiment, the area of the required vertical air duct can be reduced to 0.315 m 2 , and then the area of the required civil air shaft is approximately reduced to 0.63 m 2 .

[0032] The connection structure provided in this embodiment further includes a horizontal air duct 1. Both ends of the vertical air duct 4 are connected to the horizontal air duct 1, and two of the pressurized air supply fans 2 are respectively arranged on the two horizontal air ducts 1. A wind valve 3 is provided on the horizontal air duct 1, and the wind valve 3 is located between the pressurized air supply fan 2 and the vertical air duct 4. The wind valve 3 can play a role in adjustment.

[0033] The wind valve 3 can be a 70°C fire damper. The 70°C fire damper is usually in an open state. When the smoke temperature in the pipeline reaches 70°C during a fire, it closes and can meet the requirements of smoke leakage and fire resistance integrity within a certain period of time, playing a role in isolating smoke and preventing fire.

[0034] Embodiment 2

[0035] On the basis of Embodiment 1, in this embodiment, a control valve is provided at the middle position of the vertical air duct 4. After closing the control valve, the upper and lower sections of the vertical air duct 4 can be disconnected. For example, when the total number of floors is 10, the control valve is located between the 5th floor and the 6th floor. If the control valve is closed, the air sent by the pressurized air supply fan 2 on the first floor into the vertical air duct 4 can only be blown out through the louver air supply openings 6 within the 1st - 5th floors, and the air sent by the pressurized air supply fan 2 on the top floor into the vertical air duct 4 can only be blown out from the louver air supply openings 6 within the 6th - 10th floors.

[0036] For example, when pressurized air supply is not required on the 6th - 10th floors (no personnel), only the pressurized air supply fan 2 on the first floor can be turned on to supply air only to the louver air supply openings 6 on the 1st - 5th floors, which can prevent fresh air from being transported along the vertical air duct 4 to the high floors, resulting in a deterioration of the pressurized air supply effect and a decrease in the air pressure on the 1st - 5th floors.

[0037] Therefore, after closing the control valve, only the pressurized air supply fan 2 on the first floor can be turned on, which can reduce power consumption while ensuring the pressurized air supply effect on the 1st - 5th floors.

[0038] Embodiment 3

[0039] On the basis of Embodiment 1, in this embodiment, a single-chip microcomputer is further included. The louver air supply outlet 6 is communicated with the vertical air duct 4 through a control pipe. An electric control valve is provided on the control pipe, and the electric control valve is electrically connected to the single-chip microcomputer. The opening and closing of the electric control valve can be controlled by the single-chip microcomputer. When pressurized air supply is not required on some floors, the electric control valve in the corresponding floors can be closed through the single-chip microcomputer, which can increase the pressurized air supply effect on other floors. For example, when the total number of floors is 10, if there are no people on the 8th - 10th floors, the electric control valve in this area can be closed to increase the air pressure on the lower floors.

[0040] In the present utility model, the mechanisms, components, and parts for which no specific structures are described are existing structures that already exist in the prior art and can be directly purchased from the market.

[0041] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, "first" and "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0042] The above is only the preferred implementation of the present utility model and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A connection structure for a vertical pressurized air supply system in a stairwell, characterized in that: It comprises a pressurized air supply shaft (5), a vertical air duct (4), a louvered air supply outlet (6), and at least two pressurized air supply fans (2); The vertical air duct (4) is arranged in the pressurized air supply shaft (5), and the two ends of the vertical air duct (4) are respectively connected to the air outlets of the two pressurized air supply fans (2); The louver air supply port (6) is arranged in the stairwell, and the louver air supply port (6) is connected to the vertical air duct (4).

2. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 1 is characterized in that: It also comprises a horizontal air duct (1), both ends of the vertical air duct (4) are connected to the horizontal air duct (1), and the two pressurized air supply fans (2) are respectively arranged on the two horizontal air ducts (1).

3. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 2 is characterized in that: The horizontal air duct (1) is provided with an air valve (3), and the air valve (3) is located between the pressurized air supply fan (2) and the vertical air duct (4).

4. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 3 is characterized in that: The air valve (3) is a 70°C fireproof regulating valve.

5. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 1 is characterized in that: The vertical air duct (4) extends from the first floor to the top floor.

6. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 1 is characterized in that: The two pressurized air blowers (2) are respectively located on the first floor and the top floor.

7. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 1 is characterized in that: One of the shutter air outlets (6) is arranged every two floors.

8. The connection structure of the vertical pressurized air supply system in a stairwell according to claim 1 is characterized in that: Each of the three floors is provided with one of the shutter air supply outlets (6).

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