Hydraulic Cable Bolt Tensioner
Decentralized Power Sourcing from Bolter Manifolds
Where fixed pneumatic feeds or electrical networks are unavailable, utilizing a machine's existing hydraulic manifold serves as an alternative. This hydraulic tensioning device draws fluid directly from multi-arm roof bolters operating at the heading. By avoiding the installation of independent power lines, operators can transition immediately from the drilling phase to pre-tensioning. The primary supply input typically fluctuates within a variable envelope of 7 MPa to 32 MPa.
Dedicated Dual-Loop Architecture and Intensification
To preserve the fine-tolerance internal valving, the system enforces strict segregation between the drive mechanism and the tensioning fluid. Heavy particulate matter from the host rig's oil is blocked from entering the cylinder. An internal booster then elevates the working pressure to a regulated 63 MPa. During piston advancement, the fluid output is strictly dampened to eliminate mechanical surges. This non-pulsating transfer prevents structural micro-fractures along the anchor head, guaranteeing a uniform preload distribution.
Product Specifications
|
Technical Index |
Operational Data |
|
Equipment Classification |
MY-Series Actuator Array |
|
Primary Supply Band |
7 to 32 MPa (Host Dependent) |
|
Maximum Discharge Threshold |
63 MPa |
|
Continuous Output Capacity |
2.0 L per minute |
|
Fluid Interface |
Integrated Bolter / Mining Rig Extraction |
Heading Face Execution and Capacity Limits
Following the drilling rig, the equipment eliminates the downtime associated with auxiliary hose routing. For heavy-load assignments exceeding 300 kN, the achievable flow at the site's operating temperature must be verified against the 2.0 L/min rated capacity. Structural contours and polymer seal compositions can be adjusted during fabrication to navigate narrow roadway clearances.
Dispatch Verification and Export Packing
Prior to warehousing, every pump assembly is subjected to a strict pressure-hold verification to ensure the intensification seals remain intact. For overseas transit, all hardware is housed in solid wood shipping crates, with each component encased in shock-absorbing bubble film.
Procurement Inquiries
Q1: In what specific scenarios is this system most advantageous?
A1: It is optimal where electrical equipment is prohibited due to gas hazards, compressed air systems lack the required pressure, but the on-site machinery (such as a roof bolter) already operates a hydraulic system between 7 MPa and 32 MPa.
Q2: How is pressure fluctuation managed during operation?
A2: While minor fluctuations occur due to the host machine's variable output, the internal intensification mechanism smooths these surges to deliver a steady 63 MPa output. Operators should regularly check intake filters to prevent debris from disrupting the motor's stability.
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