QZ Double-Girder Grab Overhead Crane

For bulk-material buyers who need a dedicated double-girder crane with a four-rope grab for repetitive loading, unloading, stockpile transfer or process feeding.

The QZ double-girder grab overhead crane is intended for loose bulk-material handling rather than general hook lifting. The official Henan Mine Crane QZ product-family source confirms a four-rope grab and lists ore, lime, raw coal, sand, coke, cement and slag among typical handled materials.

For procurement, crane tonnage alone is not enough. Bulk density, particle size, moisture, required throughput, grab self-weight, pickup depth, discharge height and operating cycle directly affect grab volume, hoisting duty, travel speeds and the final crane configuration.

Quick Specifications

Request A QZ Grab Overhead Crane Quote

Product Overview

The official Henan Mine Crane QZ-family source identifies the QZ grab crane as a mature and flexible bulk-handling crane using a four-rope grab. It is positioned for warehouses, material yards and workshops.

This product should be engineered around the bulk-material process. A low-density material may require a large-volume grab even when the crane tonnage is modest, while dense ore or slag can reach the crane's suspended-load limit with a much smaller grab. The grab, ropes and any below-the-hook equipment must therefore be included in the load calculation.

The source page for cat=146 currently identifies one product: Grab Double-Girder Overhead Crane. The exact p=2715 detail page was not fully retrievable through the current crawler, so unpublished numerical parameters or p=2715-specific performance claims have not been invented.

Why Choose a QZ Double-Girder Grab Crane?

Purpose-Built Bulk Handling

A four-rope grab is better suited to repetitive loose-material pickup and discharge than a standard hook crane.

Double-Girder Bridge Platform

The double-girder layout provides a practical platform for a grab trolley and repetitive industrial bulk-handling cycles.

Material-Specific Grab Selection

Grab geometry can be selected around bulk density, particle size, moisture and flow characteristics.

Suitable for Repetitive Cycles

The product is intended for repeated loading, unloading and transfer rather than occasional maintenance lifting.

Automation Upgrade Path

Henan Mine Crane also publishes an intelligent QZ-family version with MES/WMS, positioning and anti-sway functions; these should be treated as optional project scope rather than assumed on the standard cat=146 product.

Product Images

Official Henan Mine Crane QZ-family source image showing the grab crane structure and bulk-material lifting arrangement.	Official Henan Mine Crane QZ-family source image showing the grab crane structure and bulk-material lifting arrangement.	Official QZ-family source image associated with an intelligent grab-crane application in a steel-industry material-handling project.
Official QZ-family source image associated with an intelligent grab-crane application in a steel-industry material-handling project.	Official QZ-family source image associated with an unmanned grab-crane application for industrial bulk-material handling.	Official Henan Mine Crane QZ-family source image for an electric grab bridge crane.

Main Crane Components

Technical Parameters

Source-Confirmed Facts & Buyer-Defined Options

Source-confirmed QZ-family facts:

• Model designation QZ.
• Four-rope grab is used as the dedicated lifting attachment.
• Typical materials listed by the official source include ore, lime, raw coal, sand, coke, cement and slag.
• Official source positions the QZ grab crane for warehouses, material yards and workshops.

Buyer-defined items:

• Rated capacity and grab self-weight
• Bulk density and particle size
• Grab volume and jaw / bucket design
• Required throughput and cycle time
• Span, lifting height and runway length
• Stockpile / pit / hopper geometry
• Control mode and operator visibility
• Outdoor, dust, corrosion or temperature conditions
• Automation, positioning or WMS/MES interface if required

Application Scenarios

How to Select the Right QZ Grab Overhead Crane

1. Start with the Bulk Material

Provide material name, loose bulk density, particle size, moisture, temperature and abrasiveness.

2. Define Required Throughput

State tonnes per hour, operating hours per shift and peak cycle requirement.

3. Select the Grab Around Density

Grab volume should be calculated together with material density and grab self-weight so the crane is not overloaded.

4. Provide Pickup and Discharge Geometry

Stockpile height, pit depth, hopper opening and discharge elevation determine lifting height and working envelope.

5. Define Duty from the Real Cycle

Grab cranes often work more intensively than maintenance cranes. State cycles per hour and percentage of loaded travel.

6. Define Control and Visibility

Explain whether the operator can see the pickup/discharge points and whether cabin, remote or automated operation is preferred.

7. Define Environment

Outdoor rain, heavy dust, corrosion, high temperature or low temperature should be stated before electrical and mechanical selection.

Bulk Material & Grab Selection Data

Safety & Control: What Buyers Should Confirm

Installation & Maintenance

Before manufacture, confirm runway span, rail / runway-beam condition, lifting height, pit / hopper geometry, power supply and erection access. The full grab envelope should be checked against walls, bunkers, hoppers, conveyors and other process equipment.

Maintenance should follow the supplied crane manual and actual duty. In addition to bridge and trolley mechanisms, the buyer should plan routine inspection of grab ropes, rope reeving, grab pins / joints, wear edges, drums, brakes and any sensors or cameras used for the bulk-handling process.

What Information Do We Need for a Quote?

Frequently Asked Questions

What material can a QZ grab crane handle?

The official Henan Mine Crane QZ-family source lists ore, lime, raw coal, sand, coke, cement and slag as examples. The final grab must still be selected for the actual material.

Is the grab included in the crane capacity calculation?

For engineering selection, all suspended equipment below the crane—including the grab—must be included when checking the total suspended load.

How do I choose grab volume?

Use bulk density, filling behavior, grab self-weight and required throughput. A larger grab is not automatically better if it causes overload or excessive cycle time.

Can the crane be automated?

Henan Mine Crane publishes an intelligent QZ-family configuration with positioning, anti-sway and WMS/MES functions. Treat automation as project-specific scope rather than a standard assumption for the cat=146 product.

What data has the biggest effect on price?

Capacity, span, lifting height, duty, grab size, environmental protection, control mode and automation scope usually have the largest design impact.

Related Overhead Cranes

Request A QZ Double-Girder Grab Crane Quote

Send the bulk material, density, required throughput, span, lifting height, runway length, pit / hopper drawing, operating cycle and control requirements. Henan Mine Crane engineers can then size the grab, crane duty and motion configuration around the actual material-handling process.

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