Physical three-property detection system for building curtain wall

Abstract

A physical three-character detection system for a building curtain wall, including an electrical control circuit, an air volume and air pressure adjustment mechanism, a waterway component, and a detection box; the industrial computer in the electrical control circuit is connected to a PLC controller and a main junction box through an industrial Ethernet bus, respectively, Two-way transmission of data and commands; the PLC controller is connected to the water pump frequency conversion controller, fan frequency conversion controller, operation panel, air volume and air pressure adjustment mechanism, waterway components, multiple pressure protection switches, and emergency stop buttons through the field bus. The frequency conversion controller, the fan frequency conversion controller and the air volume and air pressure adjustment mechanism perform actions and controls; the displacement sensor provided in the detection box is connected to the main junction box, and the air pipe and water pipe are respectively connected to the air volume and air pressure adjustment mechanism and the waterway components. The invention can apply positive and negative two-way wind pressure, stable air flow and water flow to detect the air tightness, water tightness and wind pressure resistance of the curtain wall of the tested building, and automatically collect and save data through the measurement and control interface.

Description

technical field [0001] The invention relates to a detection device for physical testing of a building curtain wall, in particular to a detection system for the three physical properties of a building curtain wall for testing the airtightness, watertightness and wind pressure resistance of the building curtain wall. Background technique [0002] The prior art detection device for physical testing of building curtain walls can test air leakage and measure the gas leakage of building curtain walls under a certain pressure; it can test rainwater leakage and measure rainwater of building curtain walls under a certain pressure Leakage; it can test the resistance to wind pressure and measure the resistance of building curtain walls to strong winds. [0003] At present, the principle of the prior art detection devices for physical testing of building curtain walls in the domestic and foreign markets is generally the same, that is, the use of fans to provide different wind pressures ...

AI Technical Summary

Problems solved by technology

Due to the inertia of the fan itself, the method of variable frequency speed regulation cannot meet the periodic alternating wind pressure required in the wind pressure test, that is, the wind pressure change with a period of 5 seconds cannot be achieved. The specific performance is that the pressurization is rapid and the decompression is slow

[0006] 2. Due to the use of a single air volume control method, the requirements for the control algorithm are relatively high, which increases the workload of software development

But there is an obvious disadvantage: the mechanism uses wood as the installation base plate for flexible installation. However, in actual use in China, the base plate often expands due to wet weather, thereby increasing the movement resistance of the servo mechanism.

[0008] 4. In the building curtain wall detection device, due to the small torque of the servo motor selected, it often causes the motor to burn out, which affects the normal use of the equipment

Therefore, the mechanical structure is complex and the manufacturing cost is high

[0014] 3. Since the four valves are linked, in order to compensate for the influence of the diameter error of the valves, a zero-adjustment valve is installed in front of each of the four valves; therefore, additional parts are added to increase the manufacturing cost

[0015] 4. The cost of the four-linkage valve adjustment mechanism is relatively high, and the initial adjustment is more complicated. When the valve is adjusted, the pressure is more sensitive to the change of the valve position.

[0017] In the existing detection devices for building curtain walls, due to the scattered location of the on-site inspection box, the equipment room and the operating room, and the large number of sensors, most of them are installed in the on-site inspection box, a large amount of on-site inspection information and feedback from the underlying equipment need to be collected There are many signals, and the detection and control circuit adopts the traditional method to directly connect the signals to the industrial computer or PLC controller system, which will bring great difficulties to the wiring work, and correspondingly, the reliability of the system signal transmission is reduced, and the maintenance is very difficult. convenient

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