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Gravity type venturi air volume control valve

An air volume control and Venturi technology, applied in the field of gravity venturi air volume control valve, can solve the problems of slow surface wind speed control, difficult and frequent pressure differential accurate detection, etc., to save components, reduce costs, and simplify the structure.

Pending Publication Date: 2021-02-23
德昭科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. It is difficult to accurately detect the differential pressure of the system, and the quality of the control accuracy is directly related to the accuracy of the differential pressure detection;
[0007] 2. The cost is relatively high, which is not conducive to popularization and use;
[0008] 3. The accuracy is affected by the location and number of measurement points, and is more easily affected by the installation location and internal and external airflow (turbulent flow). The measured wind speed needs to be converted into an electrical signal through the sensor to adjust the air valve. The system reflects slightly slower and the control signal responds Time: <3 seconds, surface wind speed control accuracy is generally ±20%
Relying solely on the wind speed control system will result in slow and frequent surface wind control

Method used

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  • Gravity type venturi air volume control valve
  • Gravity type venturi air volume control valve
  • Gravity type venturi air volume control valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a gravity-type Venturi air volume control valve includes a valve body 1 , the valve body 1 includes a shrinking pipe section 11 , a flared pipe section 12 and a horizontal pipe section 13 , and the rotating shaft 2 is arranged on the horizontal pipe section 13 . The ratio of the maximum pipe diameter to the minimum pipe diameter of the shrinkage pipe section 11 is 2:1. The ratio of the maximum pipe diameter to the minimum pipe diameter of the flared pipe section 12 is 2:1. The horizontal pipe section 13 is arranged at the flared opening of the flared pipe section 12 , and its inner diameter is equal to the maximum inner diameter of the flared pipe section 12 .

[0032] Such as Figure 2-3 As shown, the valve body 1 is provided with a rotating shaft 2, and the rotating shaft 2 is arranged laterally on one side inner wall of the horizontal pipe section 13, and the distance between the top of the rotating shaft 2 and the inner wall of the horiz...

Embodiment 2

[0036] The ratio of the maximum pipe diameter to the minimum pipe diameter of the shrinkage pipe section 11 is 1.5:1. The ratio of the maximum pipe diameter to the minimum pipe diameter of the flared pipe section 12 is 1.5:1.

[0037] The distance between the top of the rotating shaft 2 and the inner wall of the horizontal pipe section 13 is 3mm.

[0038] The relationship between the area S1 of the valve plate 3 and the lateral area S2 of the valve body 1 where the valve plate 3 is located is: S1=0.5S2.

[0039] The material of the rotating shaft 2 is PTFE, and the compressive strength range is about 25MPa

[0040] The material of the valve plate 3 is LDPE, and the thickness is 10MM.

[0041] All the other are with embodiment 1.

Embodiment 3

[0043] The ratio of the maximum pipe diameter to the minimum pipe diameter of the shrinkage pipe section 11 is 3:1. The ratio of the maximum pipe diameter to the minimum pipe diameter of the flared pipe section 12 is 3:1.

[0044] The distance between the top of the rotating shaft 2 and the inner wall of the horizontal pipe section 13 is 10 mm.

[0045] The relationship between the area S1 of the valve plate 3 and the lateral area S2 of the valve body 1 where the valve plate 3 is located is: S1=0.95S2.

[0046] The material of the rotating shaft 2 is PTFE, and the compressive strength range is about 25MPa

[0047] The material of the valve plate 3 is LDPE, and the thickness is 10MM.

[0048] All the other are with embodiment 1.

[0049] when using it,

[0050] The gravity type Venturi air volume control valve of each of the above-mentioned embodiments is installed in the air duct, and the end of the necking pipe section 11 is connected to the exhaust fan, and the power of ...

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Abstract

The invention relates to a gravity type venturi air volume control valve. The gravity type venturi air volume control valve comprises a valve body (1), a rotating shaft (2) is arranged in the valve body (1), and a valve plate (3) capable of rotating around the rotating shaft is arranged on the rotating shaft (2). Compared with the prior art, the gravity type venturi air volume control valve provided by the invention has the advantages of rapid reaction, no adjustment control delay, substantial cost reduction reaching 80% or above, and the like.

Description

technical field [0001] The invention relates to a Venturi air volume control valve, in particular to a gravity type Venturi air volume control valve. Background technique [0002] The air volume control valve is an indispensable and important accessory for ventilation, air conditioning and air purification projects in industrial plants or civil buildings. It is used to adjust the air volume of branch pipes in the ventilation system piping, and can also be used for mixed adjustment of fresh air and return air. At present, the commonly used air volume control valves are mainly Venturi valves and butterfly valves. [0003] The Venturi airflow control valve combines a mechanical pressure-independent regulator with a high-speed airflow controller. Through the aerodynamic design, the valve has quiet operation performance. The quick-response automatic pressure balance device provides reliable control of fume hood dust collection and indoor pressure. The Venturi valve is not affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/20F16K1/32F16K1/36F16K27/02F16L55/07
CPCF16K1/2028F16K1/32F16K1/36F16K27/0209F16L55/07
Inventor 王国东杜志波
Owner 德昭科技(上海)有限公司
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