Cable penetration seal test furnace

Technical parameters
1. Implementation standard: New version of GB 23864-2023 "Fireproof Sealing Materials".
2. Main purpose of the equipment: It can conduct fire resistance tests on all vertical sealing materials except for gap sealing materials.
3. Equipment highlights: - Small footprint, easy installation; -Equipped with sealed furnace walls and set up test openings; -Meet the fiber temperature rise curve and power temperature rise curve requirements in the new standard.
4. Equipment dimensions: - Standard version: height 1.6 meters, width 1.6 meters, depth 1 meter - High spec version: height 1.6 meters, width 2.6 meters, depth 1.6 meters
5. Furnace structure: The main structure is a steel structure, and the lining material is high alumina refractory fiber with a fiber thickness of 300mm.
6. Fuel: liquefied petroleum gas or natural gas.
7. Combustion control mode: single burner, separate PLC automatic control.
8. Furnace pressure control method: PLC automatic control.
9. The maximum temperature inside the experimental device furnace is 1250 ℃, and at this temperature, the maximum temperature rise on the outer wall of the furnace is 30 ℃.

The device contains content
1. Furnace body
2. Refractory materials
3. Combustion system
4. Electrical control system
5. Liquefied gas pressure reduction system (not available when the gas source is natural gas)
6. Test frame

Specific scheme description

1. Structural characteristics of furnace body

1.1 The furnace test device has preset test positions. The standard version test position is at the front of the furnace, while the high-end version test position is at the front and top.
1.2 Fiber lining: In order to ensure minimal deformation and reduce deflection of the furnace body under high temperature conditions, this plan uses 300mm thick refractory fibers on the furnace top to ensure good insulation, reduce furnace body deformation, and extend the service life of steel structures and refractory materials.

2The refractory material testing device is a full fiber structure, using 300mm thick high alumina refractory fibers. First, lay two layers of staggered bonded fibers near the steel plate of the furnace wall, and then stack and stack them with refractory fiber forming blocks. Stainless steel anchors are used to fix the refractory fibers between each other and between the refractory fibers and the side wall of the testing device. Among various fiber lining construction methods, this construction method is more conducive to sealing the furnace wall. The staggered inner layer of stacked fibers facilitates compression in the up and down, left and right directions. The construction specification of threading fixation method is that the furnace wall steel plate has fewer thermal short circuits, and the threading is buried in the fiber layer. The stainless steel anchor does not directly contact the high-temperature air inside the test device, reducing the possibility of high-temperature air inside the test device conducting heat directly outward through the fiber fixation point. The furnace lining constructed using a combination of layer by layer and layer by layer threading and overall fixation method has good overall integrity, is firm and reliable, has a smooth and beautiful appearance, and has a long service life.

Technical solution features
1. The construction method of using a combination of layer by layer and layer by layer to fix fire-resistant fibers as a whole;
2. The combustion control method of individual control of a single burner, with independent adjustment of air supply and gas supply;
3. The thermocouple inside the furnace serves as the control thermocouple for the combustion system. The temperature signal collected is processed by the PLC and the average temperature value is used as the control output signal to control the combustion status of each burner;
4. When a thermocouple malfunctions, the fault temperature point will be automatically shielded, and the control system will no longer collect or record this temperature point after it is shielded;
5. Reserved communication interface for electrical control system;