Variable-pressure air film fan system

Abstract

The utility model relates to a variable pressure air film fan system, which belongs to the technical field of air film buildings and particularly comprises an air film building and a concrete retaining wall arranged at the bottom of the air film building, two ventilation openings are arranged on the concrete retaining wall, and a first air pipe and a second air pipe are mounted on the two ventilation openings. A first fan is installed at one end of the first air pipe, a second fan is installed at one end of the second air pipe, a third air pipe is further connected between the second fan and the first air pipe, a switching valve is arranged between the third air pipe and the first air pipe, an air inlet is formed in the third air pipe, and an air outlet is formed in the second air pipe. The ends, connected with the ventilation opening, of the first air pipe and the second air pipe are provided with air outlet check valves, an air inlet of the third air pipe is provided with an air inlet check valve, the structure is simple, the design is reasonable, and the air pressure of the air film building can be adjusted according to weather conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to a variable pressure air film fan system and belongs to the technical field of air film building. BACKGROUND

[0002] In the air film building, the attached fan system is relied on to maintain the positive pressure environment inside the air film building, so as to ensure the external morphological structure of the air film building. In addition, the air film building also needs to have the ability to resist extreme weather conditions, and the pressure provided by the fan system changes with the change of external meteorological conditions. Under normal weather conditions, only a low pressure is needed inside the air film building to achieve the purpose of energy saving. Under extreme rain and snow weather conditions, a high pressure needs to be maintained inside the air film building to resist the external pressure and maintain the safety of the building. Under the existing technical conditions, the selection of a high-pressure fan to cope with external extreme weather conditions contradicts the low-pressure requirement for normal operation, resulting in low fan operation efficiency, and additionally increasing investment and energy consumption level of the air film building operation, which is not conducive to the promotion and use of the industry and hinders the development of the industry. SUMMARY

[0003] To solve the technical problems existing in the prior art, the utility model provides a variable pressure air film fan system which is simple in structure, reasonable in design and capable of adjusting the air film building wind pressure according to the weather conditions.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a variable pressure air film fan system, which comprises an air film building and a concrete retaining wall arranged at the bottom of the air film building. Two ventilation openings are arranged on the concrete retaining wall. A first air pipe and a second air pipe are installed on the two ventilation openings. A first fan is installed at one end of the first air pipe. A second fan is installed at one end of the second air pipe. A third air pipe is further connected between the second fan and the first air pipe. A switching valve is arranged between the third air pipe and the first air pipe. An air inlet is arranged on the third air pipe. An air outlet check valve is arranged at the end of the first air pipe and the second air pipe connected with the ventilation opening. An air inlet check valve is arranged on the air inlet of the third air pipe.

[0005] Preferably, the air inlets of the first fan and the third air pipe are both provided with air inlet rainproof curtains.

[0006] Preferably, the switching valve is an electric switching valve.

[0007] Preferably, the air outlet check valve and the air inlet check valve are both gravity type check valves.

[0008] Preferably, under normal weather conditions, the switching valve is closed, and the first fan and the second fan provide air supplement to the air film building in a parallel manner.

[0009] Preferably, under extreme weather conditions, the switching valve is opened, and the first and second fans provide air volume to the air film building in series.

[0010] Compared with the prior art, the utility model has following technical effects: the utility model discloses a switching valve to control the working mode of the fan group, thereby controlling the highest pressure of the fan system outlet. When working in parallel, the system provides lower outlet pressure, and when working in series, the system provides higher outlet pressure. In this way, when selecting the fan equipment of the air film building, it is not necessary to select the fan with higher pressure to deal with the extreme weather condition which appears rarely, thereby reducing the initial equipment investment. When the extreme weather condition appears and high pressure is needed, the switching control valve is used to realize the high pressure output of the equipment group, thereby ensuring the safety of the building.

[0011] In addition, the switching of different modes of the utility model can avoid the problem of efficiency reduction of the single fan under different working conditions, so that each fan works near the best efficiency point, thereby reducing the system energy consumption in daily application and improving the energy efficiency index of the whole air film building. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the utility model.

[0013] Fig. 2 It is an installation structural schematic view of the utility model.

[0014] Fig. 3 It is an exploded structural schematic view of the utility model. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0016] As shown in the drawings, Figs. 1 to 3 The variable pressure air film fan system includes an air film building and a concrete retaining wall 2 arranged at the bottom of the air film building. Two ventilation openings 3 are arranged on the concrete retaining wall 2. A first air pipe 4 and a second air pipe 5 are installed on the two ventilation openings 3. A first fan 6 is installed at one end of the first air pipe 4. A second fan 7 is installed at one end of the second air pipe 5. A third air pipe 8 is further connected between the second fan 7 and the first air pipe 4. A switching valve 9 is arranged between the third air pipe 8 and the first air pipe 4. An air inlet is arranged on the third air pipe 8. An air outlet check valve 11 is arranged at the end of the first air pipe 4 and the second air pipe 5 which is connected with the ventilation opening. An air inlet check valve 1 is arranged on the air inlet of the third air pipe 8.

[0017] The utility model discloses a wind fan system of air film building, which comprises a concrete retaining wall 2, a first air inlet 3, a first air pipe 4, a second air pipe 5, a second air inlet 6, a first fan 7, a third air pipe 8 and a switching valve 9.

[0018] The air inlet of the first fan 6 and the air inlet of the third air pipe 8 are provided with air inlet rainproof curtains 10, which play a role in preventing rain. The switching valve 9 is an electric switching valve, which is convenient for intelligent control. The air outlet check valve 12 and the air inlet check valve 1 are both gravity type check valves, which are automatically controlled according to pressure and are convenient to use.

[0019] The above description is only a preferred embodiment of the utility model, and is not used to limit the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the scope of the utility model.

Claims

1. A variable pressure pneumatic membrane fan system comprising a pneumatic membrane building and a concrete retaining wall disposed at the base of the pneumatic membrane building, characterized in that: The concrete retaining wall is provided with two ventilation openings, two first air pipes and second air pipes are installed on the ventilation openings, one end of the first air pipe is provided with a first air blower, one end of the second air pipe is provided with a second air blower, a third air pipe is further connected between the second air blower and the first air pipe, a switch valve is arranged between the third air pipe and the first air pipe, an air inlet is arranged on the third air pipe, an air outlet check valve is arranged on the end of the first air pipe, the second air pipe and the ventilation opening, an air inlet check valve is arranged on the air inlet of the third air pipe.

2. The variable pressure pneumatic membrane fan system of claim 1, wherein: The air inlets of the first air blower and the third air pipe are provided with air inlet rainproof curtains.

3. The variable pressure pneumatic membrane fan system of claim 1, wherein: The switch valve is an electric switch valve.

4. The variable pressure pneumatic membrane fan system of claim 1, wherein: The air outlet check valve and the air inlet check valve are both gravity check valves.

5. The variable pressure pneumatic membrane fan system of claim 1, wherein: Under normal weather conditions, the switch valve is closed, the first air blower and the second air blower provide air supplement to the air-supported building in parallel.

6. The variable pressure pneumatic membrane fan system of claim 1, wherein: Under extreme weather conditions, the switch valve is opened, the first air blower and the second air blower provide air supplement to the air-supported building in series.

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