Exhaust tail end with low-resistance drainage structure

Abstract

The exhaust tail end with the low-resistance drainage structure comprises a necking opening, a heightened straight pipe and an elbow which are sequentially connected, and a drainage funnel is arranged on the lower end face of the elbow. The drainage funnel comprises a funnel body, a funnel pore plate and a floating ball; a drainage port is formed in the lower end of the funnel body; the lower end face of the elbow is provided with a standby water outlet, and the standby water outlet is sealed through an elastic sealing plate. The concentration of harmful gas at the breathing height of a human body is effectively reduced, the health of people is protected, rainwater is effectively prevented from flowing backwards into the exhaust unit through the low-resistance drainage structure, and damage to the fan is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gas ventilation technology, specifically an exhaust terminal with a low-resistance drainage structure. Background Technology

[0002] In some factories or hospitals, an umbrella-shaped rainproof structure is installed on the roof for rain protection and ventilation. The umbrella-shaped rainproof structure mainly relies on its unique shape and materials to achieve the rainproof function. The rainproof cap at the end of the traditional exhaust is generally an umbrella-shaped structure, which can guide rainwater to flow away while allowing air circulation.

[0003] However, in traditional umbrella-shaped rainproof structures, rainwater may drift into the exhaust vent during windy weather, causing rainwater to backflow into the exhaust fan unit and damage the fan. During exhaust, the air is blocked by the top umbrella structure, which increases wind resistance. This seriously affects the exhaust of air and the efficiency of the exhaust system, especially under high wind speeds. Utility Model Content

[0004] The purpose of this invention is to provide an exhaust terminal with a low-resistance drainage structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an exhaust terminal with a low-resistance drainage structure, comprising:

[0006] As a further embodiment of this utility model: an exhaust terminal with a low-resistance drainage structure includes a constricted opening, a heightened straight pipe and an elbow connected in sequence, wherein a drainage funnel communicating with the elbow is provided on the lower end face of the elbow.

[0007] The drainage funnel includes a funnel body, a funnel orifice plate, and a float ball disposed inside the funnel body. A drainage outlet is provided on the lower end face of the funnel body.

[0008] The lower end face of the elbow is provided with a spare drain outlet, which is sealed by an elastic sealing plate.

[0009] As a further embodiment of this utility model: the opening diameter of the drain outlet is smaller than the diameter of the float, the funnel body has an inverted trapezoidal structure, and the funnel orifice plate is disposed at the connection between the funnel body and the elbow.

[0010] As a further embodiment of this utility model: a plurality of fixing rods are provided on the lower end face of the elbow, the fixing rods are evenly distributed at each corner of the spare drain outlet, a limit ring is provided on the lower end face of the fixing rod, and a compression spring is sleeved on the fixing rod, the two ends of the compression spring abutting against the limit ring and the lower end face of the elbow respectively.

[0011] As a further improvement of this utility model: the upper diameter of the constricted opening is smaller than the lower diameter, and a rodent-proof mesh is bolted to the opening at the upper part of the constricted opening.

[0012] As a further improvement of this utility model: a stepped structure is provided at the opening at the lower part of the elbow, the stepped structure being higher than the spare drain outlet and the funnel plate, and an inclined rain shield is provided on the stepped structure.

[0013] As a further improvement of this utility model, the outer side of the elbow is connected with several support feet by welding.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model provides an exhaust terminal with a low-resistance drainage structure. The airflow is discharged directly through the constriction without obstruction, which can effectively reduce the concentration of harmful gases at the human breathing height, thereby protecting people's health. Rainwater enters through the rodent-proof net and flows into the drainage funnel at the bend. The buoyancy of the rainwater causes the float to rise, opening the drain outlet of the drainage funnel, and the rainwater flows out directly, preventing rainwater from entering the fan and causing damage to the fan.

[0016] 2. This utility model utilizes a low-resistance drainage structure to greatly reduce exhaust resistance, which not only significantly reduces noise generation but also significantly reduces the energy consumption of the exhaust fan unit, thereby achieving the effect of energy saving and emission reduction.

[0017] 3. When the rain is heavy, the rainwater entering the bend will press the elastic sealing plate downward due to its weight, compressing the spring. Then the rainwater will be discharged through the gap between the elastic sealing plate and the backup drain. When the rainwater is completely discharged or the amount of rainwater is small, the elastic sealing plate will rebound due to the rebound effect of the compression spring, thereby sealing the backup drain. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a side view of an embodiment of the present utility model;

[0020] Figure 3 This is a three-dimensional structural diagram from the bottom perspective in an embodiment of the present invention;

[0021] Figure 4 As an embodiment of this utility model Figure 3 Enlarged view at point A;

[0022] Figure 5 This is a partial cross-sectional view of an embodiment of the present utility model.

[0023] In the diagram: 1. Drainage funnel; 2. Backup drain outlet; 3. Rain shield; 4. Elbow; 5. Extended straight pipe; 6. Narrowing; 7. Rodent-proof mesh; 8. Support leg; 9. Elastic sealing plate; 10. Stepped structure; 11. Float; 12. Funnel body; 13. Funnel orifice plate; 14. Fixing rod; 15. Limiting ring; 16. Compression spring. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] Reference Figure 1 as well as Figure 2 As shown in the figure, an exhaust terminal with a low-resistance drainage structure is presented in this embodiment of the present invention. It includes a constriction 6, a heightened straight pipe 5, and an elbow 4 connected in sequence. The lower end face of the elbow 4 is provided with a drainage funnel 1 communicating with the elbow 4. The drainage funnel 1 is used for filtering and draining water. The drainage funnel 1 includes a funnel body 12, a funnel orifice plate 13, and a float 11 disposed in the funnel body 12. A drain outlet is opened on the lower end face of the funnel body 12. Rainwater enters from the rodent-proof mesh 7 and flows into the drainage funnel 1 when it reaches the elbow 4. The buoyancy of the rainwater causes the float 11 to rise, and the drain outlet of the drainage funnel 1 opens, allowing the rainwater to flow out directly. The opening diameter of the drain outlet is smaller than the diameter of the float 11 to ensure that the float 11 will not fall through the drain outlet. The funnel body 12 has an inverted trapezoidal structure. The funnel orifice plate 13 is disposed at the connection between the funnel body 12 and the elbow 4 and is used for filtering the water flow.

[0026] Reference Figure 3 and Figure 4 As shown, in another embodiment of this utility model: a spare drain outlet 2 is provided on the lower end face of the elbow 4, and the spare drain outlet 2 is sealed by an elastic sealing plate 9; a plurality of fixing rods 14 are provided on the lower end face of the elbow 4, and the fixing rods 14 are evenly distributed at each corner of the spare drain outlet 2. A limit ring 15 is provided on the lower end face of the fixing rod 14, and a compression spring 16 is sleeved on the fixing rod 14. The two ends of the compression spring 16 abut against the limit ring 15 and the lower end face of the elbow 4, respectively. The limit ring 15 can limit the compression spring 16. When the rainwater is heavy, the rainwater entering the elbow 4 will press the elastic sealing plate 9 downward due to its weight, and the compression spring 16 will contract. Then the rainwater will be discharged through the gap between the elastic sealing plate 9 and the spare drain outlet 2. When the rainwater is completely discharged or the amount of rainwater is small, the elastic sealing plate 9 will rebound due to the rebound effect of the compression spring 16, thereby sealing the spare drain outlet 2.

[0027] As a further improvement of this utility model: the upper diameter of the constriction 6 is smaller than the lower diameter, and a rodent-proof mesh 7 is bolted to the opening at the upper part of the constriction 6. The rodent-proof mesh 7 not only does not affect the airflow, but also prevents large foreign objects or rats from entering the pipe through the constriction 6.

[0028] Reference Figure 5 As shown, in other embodiments of this utility model: a stepped structure 10 is provided at the lower opening inside the elbow 4. The stepped structure 10 is higher than the spare drain outlet 2 and the funnel plate 13, which can prevent rainwater from overflowing from the opening of the elbow 4. An inclined rain shield 3 is provided on the stepped structure 10. The rain shield 3 has a blocking effect and can effectively prevent excessive rainwater from splashing into the fan and causing damage to the fan. Several support feet 8 are welded to the outside of the elbow 4. By using the support feet 8 to support the device, the stability during use is improved.

[0029] The working principle of this utility model is as follows: The exhaust terminal with a low-resistance drainage structure provided by this utility model allows airflow to be discharged directly through the constriction 6 without obstruction, effectively reducing the concentration of harmful gases at the human breathing height, thereby protecting people's health. Rainwater enters through the rodent-proof net 7 and flows into the drainage funnel 1 at the bend 4. The buoyancy of the rainwater causes the float 11 to rise, opening the drain outlet of the drainage funnel 1, allowing the rainwater to flow out directly. If the float 11 fails in extreme cases, or if the amount of rainwater is too large, the rainwater accumulates to a certain height at the bend 4, generating water pressure that opens the backup drain outlet 2, allowing the rainwater to still be discharged.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An exhaust terminal with a low-resistance drainage structure, characterized in that, It includes a constricted opening (6), a heightened straight pipe (5), and an elbow (4) connected in sequence. The lower end face of the elbow (4) is provided with a drainage funnel (1) that communicates with the elbow (4). The drainage funnel (1) includes a funnel body (12), a funnel orifice plate (13), and a float (11) disposed in the funnel body (12). A drainage outlet is provided on the lower end face of the funnel body (12). The lower end face of the elbow (4) is provided with a spare drain outlet (2), which is sealed by an elastic sealing plate (9).

2. The exhaust terminal with a low-resistance drainage structure according to claim 1, characterized in that, The opening diameter of the drain outlet is smaller than the diameter of the float (11), the funnel body (12) has an inverted trapezoidal structure, and the funnel orifice plate (13) is located at the connection between the funnel body (12) and the elbow (4).

3. The exhaust terminal with a low-resistance drainage structure according to claim 2, characterized in that, The lower end face of the elbow (4) is provided with a number of fixing rods (14). The fixing rods (14) are evenly distributed at each corner of the spare drain (2). The lower end face of the fixing rod (14) is provided with a limiting ring (15). A compression spring (16) is sleeved on the fixing rod (14). The two ends of the compression spring (16) abut against the limiting ring (15) and the lower end face of the elbow (4), respectively.

4. The exhaust terminal with a low-resistance drainage structure according to claim 3, characterized in that, The upper diameter of the constriction (6) is smaller than the lower diameter, and a rodent-proof mesh (7) is bolted to the opening above the constriction (6).

5. The exhaust terminal with a low-resistance drainage structure according to claim 4, characterized in that, A stepped structure (10) is provided at the lower opening inside the elbow (4). The stepped structure (10) is higher than the spare drain outlet (2) and the funnel plate (13). An inclined rain shield (3) is provided on the stepped structure (10).

6. The exhaust terminal with a low-resistance drainage structure according to claim 5, characterized in that, The elbow (4) has several support feet (8) connected to its outer side by welding.

Images