Unpowered negative pressure ventilation device

Abstract

The invention relates to the technical field of drainage pipelines, in particular to an unpowered negative pressure ventilation device. The unpowered negative pressure ventilation device is communicated with a drainage pipeline and comprises a fixed base, a metal fixed shaft, a rotary bearing or a nylon gasket, a rotary cap body and the like. Natural wind of natural energy is used as rotating power, negative pressure formed by the leeside of the natural wind and the Bernoulli effect principle is used for driving air in a pipeline to flow to form negative pressure, the micro-negative pressure regulation and control technology of the drainage pipeline is achieved, meanwhile, suction damage to a water seal in a trap is avoided, and odor in the pipeline is kept not to escape into a room; the drainage system is suitable for existing building reconstruction and new building drainage systems, the living comfort is improved, the infection probability of respiratory system diseases is reduced, and the requirements of people for high-quality residences are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drainage pipeline, in particular to a kind of unpowered negative pressure ventilation device. BACKGROUND

[0002] The relevant research report shows that more than 75% of high-rise residential households are affected by return odor, and floor drain and toilet return odor are the main reasons. The floor drain return odor is mainly caused by the insufficient water seal retention capacity of floor drain or the installation of floor drain without water seal or water seal height less than 50mm, which leads to the failure to isolate the gas in the pipeline. The toilet return odor is caused by the unsealed interface between toilet outlet and drainage pipeline.

[0003] The research of World Health Organization shows that most of the gaseous pollutants contained in odor belong to "three-teratogenic (carcinogenic, teratogenic and mutagenic)" pollutants, which can cause diseases such as reduction of blood oxygen carrying capacity, lung collapse and damage. Odor often contains non-gaseous pollutants such as viruses and bacteria, which can cause diseases such as diarrhea.

[0004] At present, a common extension top ventilation cap is arranged at the top of the drainage vertical pipe, and the actual ventilation opening area is smaller than the pipe cross section. When the vertical pipe pressure fluctuates, it is difficult to inhale or discharge air in the vertical pipe in time, the pipe pressure fluctuates greatly, the water seal of the drainage pipeline system is lost and damaged, and the toilet return odor is caused. In addition, when natural wind blows towards the building, the windward surface produces positive pressure due to air accumulation, while the leeward surface or crosswind surface forms indoor negative pressure due to airflow separation and acceleration, and then the odor is sucked into the indoor. SUMMARY

[0005] The purpose of the present application is to provide an unpowered negative pressure ventilation device to solve the problems of water seal damage on the drainage system and indoor and outdoor air pressure fluctuation, which leads to toilet return odor.

[0006] To achieve the above purpose, an unpowered negative pressure ventilation device is adopted, which comprises a pipeline and an unpowered negative pressure ventilation device, and the unpowered negative pressure ventilation device is connected with the pipeline.

[0007] Among them, the unpowered negative pressure ventilation device comprises a fixed base, a metal fixing shaft, a rotating bearing or a nylon gasket, a rotating cap body and the like.

[0008] Among them, the pipeline comprises a drainage outlet pipe, a drainage branch pipe and a drainage vertical pipe, the drainage vertical pipe is connected with the drainage outlet pipe, and the drainage branch pipe is connected with the drainage vertical pipe.

[0009] The present invention provides a non-powered negative pressure ventilation device, which can both allow air to enter and exit while maintaining a slight negative pressure. In windless weather, the pipeline is ventilated through the non-powered negative pressure ventilation device. Since the ventilation port area of ​​the non-powered negative pressure ventilation device is greater than or equal to the pipeline cross-section, the pressure inside the pipeline is stable and no odor will escape.

[0010] This invention discloses a non-powered negative pressure ventilation device. When there is wind outdoors, the louvered vents in the device are aligned with the airflow direction due to the guiding effect of the wind vane. Since the louvered vents are located on the leeward side, negative pressure is created at the vents, which in turn drives the airflow within the duct to form negative pressure. Taking a common gale-force wind (level 8) as an example, existing research indicates that a negative pressure of 185-268 Pa can be generated, approximately equivalent to 19-27 mm water column pressure. In this state, for drainage rooms with negative pressure indoors, it can counteract the indoor negative pressure and maintain a stable water seal. In this state, for drainage rooms with normal indoor pressure, the negative pressure suction force is less than the water seal height, and will not cause suction damage to the water seal in the trap. In this state, for drainage rooms where the water seal is damaged or the drainage system is not sealed, negative pressure airflow will be generated at the floor drain or other gaps, ensuring that no odor escapes and pollutes the indoor environment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0013] Figure 3 This is an external side view of the present invention;

[0014] Figure 4 This is an external front view of the present invention;

[0015] Figure 5 This is the external rear view of the present invention;

[0016] Figure 6 This is an exploded view of the entire invention;

[0017] In the diagram: 1. Drainage and ventilation riser; 2. Fixed base; 3. Metal fixed shaft; 4. Rotary bearing or nylon gasket; 5. Rotary cap; 6. Metal shaft fixed wing; 7. Ventilation louver; 8. Integrated rotating bushing; 9. Wind direction tail fin; 10. Product identification. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] Please see Figures 1-6 A non-powered negative pressure ventilation device includes a drainage and ventilation riser 1, a fixed base 2, a metal fixed shaft 3, a rotary bearing or nylon gasket 4, and a rotary cap 5 arranged sequentially from bottom to top. The fixed base 2 and the metal fixed shaft 3 are connected together during injection molding by a metal shaft fixed wing 6. The inner cavity of the integrated rotary bushing 8 in the rotary cap 5 is pre-filled with lubricating grease.

[0020] The fixed base 2 and the drainage and ventilation riser 1 can be connected by adhesive or other methods. The upper diameter of the fixed base 2 is greater than or equal to the lower interface diameter, so that the opening area of ​​the ventilation louver 7 is greater than or equal to the cross-sectional area of ​​the drainage and ventilation riser 1, which reduces the air resistance when the air flows through and increases the exhaust volume when working in a windy state.

[0021] The upper part of the rotating cap body 5 has a sloping frustum 7 with a circular shape; the lower part has a circular shape; the wind direction tail fin 9 is vertically arranged. The exposed part above the ventilation louver 7 is triangular, and the hidden part below the ventilation louver 7 also serves as a support and connector for the cap body, so that the outer wall of the cap body, the ventilation louver 7, the integrated rotating bushing 8, and the wind direction tail fin 9 are connected as a whole.

[0022] Without increasing power consumption, the Bernoulli effect can be used to maintain a certain negative pressure inside the pipe, preventing positive pressure from causing foul odors to escape and pollute the indoor environment.

[0023] In order to enable the non-powered negative pressure ventilation device to adapt to ventilation pipes of different sizes and materials, the device and the fixed base 2 are available in multiple specifications and models. The outer surface of the rotating cap 5 is also engraved with product identification 10, indicating the compatible pipe material and outer diameter, which facilitates the installation and use by operators.

[0024] To make the non-powered negative pressure ventilation device more durable and corrosion resistant, the fixed base 2 and the rotating cap 5 can both be made of building drainage plastic materials (rigid polyvinyl chloride, high-density polyethylene, polypropylene pipe, etc.), and the metal fixed shaft can be made of galvanized steel, stainless steel or aluminum alloy.

[0025] To make the rotating cap 5 of the non-powered negative pressure ventilation device rotate more flexibly, the product design of the component is centered to ensure that the center of gravity is located at the axial center point. In addition, the inner cavity of the integrated rotating bushing 8 is filled with lubricating grease, and lubricating grease can be added at any time during use.

[0026] The installation method of the non-powered negative pressure ventilation device is as follows: ① Connect and fix the combined component of the fixed base 2 and the metal fixed shaft 3 to the drainage and ventilation riser 1, and use a spirit level to check the levelness of the fixed base 2 and the verticality of the metal fixed shaft 3, and adjust them to meet the requirements if necessary; ② Insert the rotating bearing or nylon gasket; ③ Check the amount of pre-filled lubricating grease in the inner cavity of the integrated rotating bushing 8, and replenish it if necessary; ④ Insert the rotating cap 5 vertically downward along the metal fixed shaft 3; ⑤ Manually rotate the rotating cap 5 to check the rotation flexibility, and complete the installation and debugging.

[0027] The maintenance method for this non-powered negative pressure ventilation device is as follows: If the rotating cap 5 is not rotating smoothly, the rotating cap 5 can be removed vertically upward along the metal fixed shaft 3, and lubricating grease can be added to the inner cavity of the integrated rotating bushing 8 or the rotating cap 5 can be replaced.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A non-powered negative pressure ventilation device, comprising a set of components including a drainage and ventilation riser (1) and its connected fixed base (2), a metal fixed shaft (3), a rotary bearing or nylon gasket (4), and a rotary cap (5), characterized in that: The non-powered negative pressure ventilation device expands the ventilation area through a fixed base (2) with a variable diameter. Inside, a metal shaft fixing wing (6) is set to wrap a metal fixing shaft (3). A rotating bearing or nylon gasket (4) is set on top to support the rotating cap body (5). Lubricating grease is filled in the integrated rotating bushing (8) to enable the rotating cap body (5) to rotate continuously in any direction. A ventilation louver (7) is set in the middle of the rotating cap body (5) to guide the airflow direction and prevent large-diameter debris from entering the drainage ventilation riser (1). A wind direction tail wing (9) is set on the upper part of the rotating cap body (5) to make the opening direction of the ventilation louver (7) basically consistent with the airflow direction by using natural wind power.

2. The fixed base (2) of the non-powered negative pressure ventilation device according to claim 1 is made of building drainage plastic material (rigid polyvinyl chloride, high-density polyethylene, polypropylene pipe, etc.) and is connected to the drainage ventilation riser (1) according to the corresponding material connection process.

3. The metal fixed shaft (3) of the non-powered negative pressure ventilation device according to claim 1 is made of corrosion-resistant metal materials such as galvanized steel, stainless steel or aluminum alloy, and is pre-connected and fixed to the fixed base (2) during manufacturing.

4. A certain gap is left between the metal fixed shaft (3) and the integrated rotating bushing (8) of the non-powered negative pressure ventilation device according to claim 1, which is used to fill the lubricating grease and reduce the frictional resistance during rotation.

5. The rotating cap (5) of the non-powered negative pressure ventilation device according to claim 1 is made of building drainage plastic material (rigid polyvinyl chloride, high-density polyethylene, polypropylene pipe, etc.), and its appearance color is consistent with that of the fixed base (2).

6. The lower edge of the rotating cap (5) of the non-powered negative pressure ventilation device according to claim 1 overlaps with the upper edge of the fixed base (2) by 20-50mm and is provided with a gap of 2-5mm.

7. The wind direction tail fin (9) of the non-powered negative pressure ventilation device according to claim 1 has a gap of 3-10mm between the lower edge and the upper edge of the fixed base (2).

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