Product Introduction
The Hinged Top Beam DJB is a retractable metal top beam used for underground roadway support in coal mines. Its length can be adjusted through a hinged structure and is used in conjunction with single hydraulic props to support the roof.
Product Specification
| Model | Number of roots per graft (root) | Allowable bending moment of beam body/(kN.m) | Minimum load per girder/kN | Allowable bending moment of the joint part/(kN.m) | Adjust the angle (not less than) | Height/mm | Other sizes/mm | weight | |||
| Up and down | around | Articulating section | Beam body H | Length (pin hole center distance) L | The beam body length L1 | ||||||
| DJB600/470 | 1--2 | 52.5 | 470 | 30 | 7° | 3° | 138 | 90 | 600 | 420 | 18.9 |
| DJB800/420 | 1--2 | 52.5 | 420 | 30 | 7° | 3° | 138 | 90 | 800 | 620 | 22.9 |
| DJB1000/300 | 1--2 | 52.5 | 300 | 30 | 7° | 3° | 138 | 90 | 1000 | 820 | 26.93 |
| DJB1200/300 | 1--2 | 52.5 | 300 | 30 | 7° | 3° | 138 | 90 | 1200 | 1020 | 30.95 |
| Model | Long beam cross-sectional size/mm | Overall quenched and tempered hardness/HB | Carrying capacity/HB | Cross-sectional factor/cm3 | weight | |||
| (Kg·m-1) | ||||||||
| Long | wide | high | WX | WY | ||||
| DFB4500/300 | 4500 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 92.7 |
| DFB4600/300 | 4600 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 94.8 |
| DFB4700/300 | 4700 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 96.8 |
| DFB4800/300 | 4800 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 98.9 |
| DFB4900/300 | 4900 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 100.9 |
| DFB5000/300 | 5000 | 100/83 | 90 | 300～350 | 300～400 | 68.66 | 46.55 | 103 |
Product Customization
Top Beam Length: 1.8m / 2.0m / 2.2m / 2.5m / 2.8m / 3.0m
Rated Working Resistance: 80kN / 100kN / 120kN / 150kN
Top Beam Height: 150mm / 180mm / 200mm
Connection Type: Single Hinged / Double Hinged
Material Specifications: Q235 / Q345
Surface Treatment: Spray Painting / Galvanizing / Powder Coating
Product Applications
Coal Mining: Roof support for roadway excavation and mining faces.
Metal Mines: Temporary support for underground roadways.
Tunnel Engineering: Roof support during construction.
Underground Projects: Roof maintenance for shafts, chambers, and other spaces.
After-sales Services
Global Technical Support Hotline:
Provides 24/7 multilingual online consultation services in English, Russian, Spanish, and other languages.
Fast Response Commitment:
Initial solution provided within 12 hours of receiving the after-sales request, with remote technical support completed within 48 hours.
Overseas Warehouse Layout:
Spare parts warehouses are established in major export markets to ensure delivery of commonly used parts within 15-30 days to the customer site.
Product Quality Guarantee:
A 12-18 month international standard warranty period is provided, with free replacement of defective parts within the warranty period.
Technical Documentation Support:
Provides English version operation manuals, maintenance guides, troubleshooting manuals, and installation video tutorials.
On-site Service Dispatch:
As per the contract, engineers can be dispatched to the customer site for equipment installation, commissioning, and fault repair.
Spare Parts Supply Assurance:
A spare parts supply list is established to support the separate purchase of consumables and key components.
FAQ
Q: Where is your factory located?
Me: Our factory is in Boshan District, Zibo City, Shandong Province
Q: Are you a trading company or a factory?
Me: We are a factory, warmly welcome you to visit our factory
Q: What do you need for a detailed quotation?
Me: Please tell me the product model you need, the number of products, the requirements for the surface treatment of the product, etc.
Q: How about your technical level?
Me: We focus on the production of coal mine support products for many years, with rich experience in research and development, we are the first manufacturer in the country to obtain the safety standard of five-meter single hydraulic pillar, and Shandong University of Technology jointly develop intelligent mining equipment, at the same time in 2025 we also help Dongtai Group to develop the required six-meter single hydraulic pillar.
Q: Do you have a safety certificate for your products?
Me: Our products have a national certification safety certificate.
Q: How do you guarantee the quality of your products?
Me: Each of our products needs to be inspected for quality before leaving the factory, and our products are closely related to the lives of coal miners, so we strive to make the best product quality.
Q: Can you provide customization, modification drawings and other requirements?
Me: Of course, if you need, we will modify our products according to your requirements and the actual situation of the coal mine.
Hot Tags: hinged top beam djb, China hinged top beam djb manufacturers, suppliers, factory, Hinged Top Beam DJB, Steel Roof Support Beams, Cross Hinged Top Beam, Metal Hinged Top Beam, Double Wedge Top Beam DJBS, pi type Steel Beam
