Active buck-boost regulating valve for three natures detecting device of building doors and windows and curtain walls

Abstract

The invention relates to an active buck-boost regulating valve for a three natures detecting device of building doors and windows and curtain walls. By means of the active buck-boost regulating valve, the problems of complex structure, large volume, large land occupation, high manufacturing cost and incapability of ensuring the buck-boost speed in the prior art are solved. The active buck-boost regulating valve is characterized in that a first exhaust opening, a second exhaust opening, a first air outlet and a second air outlet are arranged on the right end cover of a cylinder body; a fan air inlet and a fan air outlet are arranged on the left end cover of the cylinder body; a negative pressure cavity and a positive pressure cavity are arranged in the cylinder body; a servo motor is arranged in the middle of the right end cover and a fan plate is connected through a fan plate connection shaft; and a first ventilation opening and a second ventilation opening are symmetrically arranged on the fan plate. In the invention, the regulation of pressure fluctuation, the reversing of positive and negative pressures and the symmetry of buck-boost processes are integrated to a whole, therefore, the active buck-boost regulating valve has the beneficial effects of simple structure, small volume and low cost, high boost or buck speed and stable running, controls air volume by changing the sectional areas of the exhaust openings and the air outlets through the coincidence conditions of the fan plate as well as the exhaust openings and the air outlets, and realizes the reversing of positive and negative pressures through the positive rotation or the reversal rotation of the fan plate.

Description

technical field [0001] The invention belongs to the technical field of detection of building doors, windows and curtain walls, and in particular relates to an active lifting and lowering regulating valve used for three-character detection devices of building doors, windows and curtain walls. Background technique [0002] In the detection device for the three properties (air tightness, water tightness and wind resistance) of building doors, windows and curtain walls, it is necessary to figure 1 The positive and negative pressures in the shown static pressure box A are quickly adjusted to realize fluctuating pressurization and sequential pressurization. At present, the existing detection devices for building doors, windows and curtain walls mainly use three technical means to adjust the pressure: [0003] The first is to control the air volume of the fan through a frequency converter, and use a reversing valve to change the wind direction. For example, the patent application ...

AI Technical Summary

Problems solved by technology

The above-mentioned structure adopts the inverter to control the air volume of the fan, and uses the reversing valve to change the wind direction. Since the frequency of the inverter changes gradually, and the acceleration and deceleration of the fan is also gradual, the boosting speed cannot meet the requirements. When it is necessary to reduce the pressure, the frequency output of the inverter is zero, so that the fan stops blowing air (pressurization), and then opens the vent valve to reduce the pressure. The speed is very slow, so the pressure relief time is very long. It is essentially an active boost and a passive buck, which cannot guarantee the speed of boost and boost. Moreover, the entire system is very complicated, large in size, large in size, and high in manufacturing costs;

[0004] The second is to control the air volume by changing the cross-sectional area of ​​the pipe through the valve, and change the air direction with the reversing valve. Although the boosting speed is fast, the opening of the valve is extremely difficult to control, and the overshoot phenomenon is serious. To prevent overshoot, the valve can only be opened slowly , pressurize little by little, which reduces the pressurization speed, which is also an active boost and passive step-down in essence, and the speed of boost and boost cannot be guaranteed;

[0005] In the prior art, the combination of the above two structures is used to control the air volume to adjust the pressure, which solves the pressure increase speed, but the pressure reduction speed is still not guaranteed;

[0006] The third is to use a multi-valve combination to control the air volume and direction, which is an active step-up and drop-down adjustment, which can meet the speed requirements of the step-up and down-pressurization, but the opening of the valve is driven by a hydraulic linkage mechanism, resulting in high cost, large volume, and low maintenance costs. high

[0007] The patent application number CN02225190.1 discloses a "mechanical stable periodic fluctuating wind pressure system for building curtain wall detection", which includes a pressure supply system, an air duct system, a positive and negative wind pressure converter, a pressure regulating system, Pressure regulating system and test chamber, the pressure supply system includes high-pressure centrifugal blower, medium-pressure centrifugal blower and low-pressure centrifugal blower, the high-pressure, medium-pressure and low-pressure centrifugal blowers are arranged in series in the air duct system; the pressure regulating system adopts two Butterfly valve; the wave pressure regulating system includes a pressure relief valve and a wave valve. The pressure relief valve is set on the pipeline leading to the electric control box, and the wave valve is set at the outlet of the pressure relief valve. The periodic opening and closing of the infinitely variable speed mechanical valve forms fluctuating wind pressure; the pressure relief valve is used to realize the adjustment of the peak and trough of the fluctuating wind pressure. The structure of the whole system is complex, and there are also problems of high cost, large volume and high maintenance cost.

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