The experimental operation is simple, the performance is good, and it is used and recognized by smoke exhaust duct production enterprises, quality inspection departments, and related industry laboratories.

This machine adopts oil cylinders, with high control accuracy and measurement accuracy. The hydraulic oil in the oil tank is driven by a motor to enter the oil circuit through a high-pressure pump, and flows through a one-way valve, a high-pressure oil filter, a differential pressure valve group, and a servo valve before entering the oil cylinder. The computer sends control signals to the servo valve to control the opening and direction of the servo valve, thereby controlling the flow into the oil cylinder and achieving control of the constant velocity test force.

The YAW-300S fully automatic exhaust duct pressure testing machine is used for vertical bearing capacity testing of finished products in flues and exhaust ducts, fully meeting the standard JG/T 194-2018 Residential Kitchen and Bathroom Exhaust Ducts. The testing machine adopts software and electro-hydraulic servo valve control, drives hydraulic cylinders, and automatically controls the test force, displacement and deformation in multiple modes, completing compressive testing and inspection of various materials and specifications of specimens.

Applicable standards:

JC/T854-2008 "Glass Fiber Reinforced Cement Exhaust Pipe"

GBT/15231-2008 "Test Method for Properties of Glass Fiber Reinforced Cement"

Screenshot of the industry standard experimental method for testing the vertical bearing capacity of smoke exhaust ducts:

Common cross-sectional dimensions of air ducts:

Below 6 floors: 320X240 Below 12 floors: 340X300 Below 18 floors: 430X300 Below 24 floors: 460X400 Below 30 floors: 600X400 Below 36 floors: 600X500

2、 Equipment structure and function

This machine adopts oil cylinders, with high control accuracy and measurement accuracy. The hydraulic oil in the oil tank is driven by a motor to enter the oil circuit through a high-pressure pump, and flows through a one-way valve, a high-pressure oil filter, a differential pressure valve group, and a servo valve before entering the oil cylinder. The computer sends control signals to the servo valve to control the opening and direction of the servo valve, thereby controlling the flow into the oil cylinder and achieving control of the constant velocity test force.

3、 Force measurement system

Using amplifiers and A/D converters, the entire process is not divided into stages, and real-time display of load, peak value, loading speed, and intensity is available;

Adopting PID closed-loop control strategy to achieve constant speed loading and real-time display of loading curve

Automatic interval timing and continuous testing;

Flexible and convenient query and printing of test results;

4、 Main technical indicators:

1. Host structure: Frame based

2. Test force: 300KN

3. Data display mode: computer display

4. Measurement range: 2% - FS

5. Accuracy level: Level 1

6. Accuracy of test force: better than ± 1% of the indicated value