Product Introduction
The MHB Type Single Girder Semi-Gantry Crane adopts a unique semi-gantry structure (with one leg operating on ground rails and the other leg-free side running directly on workshop rails), featuring compact design, small footprint, and flexible installation. Utilizing an electric hoist as the lifting mechanism, it covers a lifting capacity range of 1-20 tons with a typical working class of A3-A5. It supports multiple operation modes including floor remote control, pendant control, and cabin operation, and can operate stably in ambient temperatures from -25℃ to +40℃.
The MHB Type Single Girder Semi-Gantry Crane is mainly suitable for material loading, unloading and handling operations in machinery manufacturing workshops, assembly workshops, open storage yards and freight yards. Particularly ideal for space-constrained environments (such as workshops without column support) or situations requiring utilization of existing workshop structures as an alternative to traditional gantry or overhead cranes, it serves as an economical and efficient light-duty material handling solution. However, it should be noted that this crane is not suitable for flammable, explosive or corrosive environments, and must not be used for lifting molten metals, toxic or flammable substances.
Product Parameter
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Parameter |
2t |
3t |
5t |
10t |
16t |
20t |
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Rated Capacity (t) |
2 |
3 |
5 |
10 |
16 |
20 |
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Span Range (m) |
10–20 |
10–20 |
10–20 |
12–22 |
12–22 |
12–22 |
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Lifting Height (m) |
6 |
6/9 |
6/9 |
9 |
9/12 |
9/12 |
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Speed (m/min) |
Hoisting |
8 |
8 (0.8/8) |
8 (0.8/8) |
7 (0.7/7) |
3.5 (VFD) |
3.5 (VFD) |
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Trolley Travel |
20 |
20 |
20 |
20 |
20 |
20 |
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Gantry Travel |
20 (floor) |
20 (floor) |
20 (floor) |
20 (floor) |
30 |
30 |
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Duty Class |
A3 |
A3–A5 |
A5 |
A5 |
A5 |
A5 |
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Recommended Rail |
P24 |
P24/P38 |
P24 |
P38 |
P43 |
P50 |
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Total Weight (t) |
3.3–12.1 |
3.8–13.2 |
5.6–22.0 |
12.5–23.7 |
15.0–26.9 |
19.0–29.4 |
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|
Max. Wheel Load (kN) |
14–35 |
19–40 |
37–53 |
78–103 |
94–128 |
103–149 |
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Motor Power (kW) |
Hoist |
3 |
4.5 |
7.5 |
13 |
18.5 |
18.5 |
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Travel |
0.8×2 |
0.8×2 |
0.8×2 |
0.8×2 |
0.8×4 |
0.8×4 |
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|
Power Supply |
3P AC 380V 50Hz |
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Cantilever Length (m) |
≤6 |
≤6 |
≤9 |
≤9 |
≤12 |
≤12 |
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|
Ambient Temp. |
-25°C ~ +40°C |
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Product Feature And Application
Main Advantages of Single Girder Semi-Gantry Cranes:
Strong Site Adaptability: Can flexibly adapt to sites with height differences based on the civil engineering requirements of the location. Particularly suitable for areas like workshop sides or warehouse entrances where a building structure exists on one side.
High Cost-Effectiveness: The single girder structure and semi-gantry design typically result in lower manufacturing costs, installation costs (saving one ground track and its foundation), and later maintenance expenses compared to full gantry or double girder cranes.
Unique Space Utilization: Can fully utilize the internal space of buildings, achieve seamless indoor-to-outdoor operation, and obtain a broader working space.
Limitations to Consider:
Relatively Lower Stiffness: Compared to double girder gantry cranes, the overall stiffness of the single girder structure is lower. Consequently, the lifting capacity and span are usually limited to Q ≤ 20t and S ≤ 20m.
Selective Load Passage: If using L-shaped legs, the space for the load to pass through the leg area is relatively smaller; C-shaped legs can provide greater passage space.
Dependence on External Support: The leg-less side relies on the load-bearing beam of the workshop or trestle for support. It is essential to ensure this structure has sufficient strength and stability.
Application Scenarios of Single Girder Semi-Gantry Cranes:
Workshops and Warehouses: Widely used in areas against workshop walls or at warehouse entrances for material loading, unloading, and handling. Can be used in conjunction with overhead bridge cranes to improve overall workshop efficiency.
Open Storage Yards and Lines: Suitable for open storage yards or along railway and port lines for general loading, unloading, and lifting handling operations.
Logistics Transit and Container Handling: Used in warehouses, yards, and other places for indoor container lifting, outdoor stacking, or indoor-outdoor transfer operations.
Product Details
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Main Girder The main girder is the primary load-bearing structure of the crane, typically constructed as a box girder or truss structure using high-strength steel. |
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End Carriage |
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Electric Hoist |
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Leg The MHB Type Semi-gantry Crane features a single-side leg (commonly box-section or H-section steel) on one end, while the other end moves along an elevated rail. |
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Wheels |
Certification
Company Profile
Packaging&Shipping
Evaluation
FAQ
Q: Under what circumstances should a MHB Type Single Girder Semi-Gantry Crane be considered?
A: Your working area has a solid building structure (such as a workshop wall, warehouse column) on one side and an open space on the other, with a height difference present. The lifting capacity is typically below 20 tons, with a span within 20 meters, belonging to a medium-light duty class. You aim to save on the construction cost of one ground track and pursue high cost-effectiveness.
Q: What key technical parameters should be focused on during selection?
A: Rated Lifting Capacity: Overloading is strictly prohibited. Span: The distance between the centerlines of the main runway tracks. Lifting Height: The vertical distance between the upper and lower limit positions of the hook. Work Class: Indicates the frequency of use and load conditions of the crane (commonly A3-A5). Rail Model and Height Difference: Tracks must be laid strictly according to the design drawings.
Q: What routine inspections should be performed before operation?
A: Check metal structures such as the main girder, leg, and end carriage for cracks, deformation, or corrosion. Check that the brakes are sensitive and reliable; check the wire rope for broken wires, broken strands, or distortion; check the hook for cracks; check if the pulleys are intact. Check that the limiters (hoisting upper/lower limit, travel limit) are effective, and that the alarm and emergency stop switches function correctly.
Q: What are the key points of daily maintenance?
A: Regularly lubricate all moving parts, such as the wire rope, wheel bearings, gear couplings, and pulleys. Periodically check and tighten all connection bolts, especially those for rail clamps, the trolley/travel drive mechanisms, and the connections between the legs and the cross beam. Promptly adjust the brake clearance to ensure reliable braking; adjust the position of the limiters to ensure they are accurate and effective.
Q: Under what conditions should the wire rope be scrapped and replaced?
A: It should be scrapped immediately if any of the following conditions occur: Broken Wires: The number of broken wires in one lay length exceeds the standard specification. Wear or Corrosion: The reduction in wire rope diameter due to wear or corrosion exceeds 40% of the nominal diameter. Deformation: Obvious plastic deformation occurs, such as core protrusion, kinking, bending, or flattening. Severe Corrosion: Deep pits appear on the wire rope surface, and the wires become slack.
Q: Are there any special maintenance considerations for the unique structure of the semi-gantry crane?
A: Yes, pay special attention to the "high side": Periodically inspect the rail supports and track beam installed on the workshop wall or trestle for cracks, settlement, or deformation. This is the lifeline of the entire equipment, and failure poses extremely high risks. Ensure the parallelism and elevation difference between the ground track and the elevated track consistently meet the design requirements to prevent rail gnawing.