Description

Portal crane is a large rotary crane for ports. Its structural design fully takes into account stability, load capacity and operating flexibility. It is widely applied in port loading and unloading, shipyards and large industrial sites. The whole machine is mainly composed of four parts: metal structure, working mechanism, electrical system and safety device, and has the characteristics of complex structure and complete functions.

Metal structural part includes a gantry, a slewing platform, a boom system and a balance system. The gantry frame adopts a box-shaped cross-section welded structure, consisting of rigid legs on both sides and upper beams to form a stable door-shaped frame. It can withstand huge vertical loads and overturning moments. Slewing platform is on the top of the gantry through large slewing support, supporting the lifting mechanism, luffing mechanism and the slewing mechanism. The boom system mostly adopts a truss-type or box-type structure, and the pitch movement is achieved through the magnitude-changing mechanism. Some portal crane uses a combined boom system, which forms a four-link mechanism through the elephant nose bridge and a rigid pull rod to ensure that the goods move approximately horizontally.

The working mechanism includes lifting mechanism, boom luffing mechanism, slewing mechanism and crane operation mechanism. The lifting mechanism consists of a motor, a reducer, a brake and a wire rope reel, which can achieve vertical lifting of heavy objects. Amplitude variable controls the elevation angle change of the boom, and the common ones are wire rope swing and rack swing. Slewing mechanism is driven by a vertical speed reducer motor, so that portal crane can operate 360° fully slew.

Application

• Port Terminal Operation: For loading and unloading containers, steel and other heavy cargoes, providing efficient material handling solutions for cargoes of different sizes and weights.
• Shipyards and ship repair yards: Suitable for lifting and assembly of large components during ship construction and maintenance, ensuring construction progress and quality and improving work efficiency.

Parameter

Basic Parameters	Rated Lifting Capacity	Hook (t)	10	16	25	40	60	80
		Grab(t)	10	16	25	40	40	40
	Min. Working Range (m)	Above the Rail Surface(m)	20	25	25	28	30	35
		Below the Rail Surface (m)	10	10	15	15	18	20
	Max.Working Range(m)		30	35	35	35	40	45
	Min.Working Range (m)		8.5	8.5	9.5	11	12	12
	Slewing Radius of Tail(m)		6.5	7	7.5	8	9	9.5
	Rail Gauge(m)		10.5/12	10.5/12	10.5/12/14	10.5/12/14/16	12/14/16	12/14/16
	Base Distance(m)		10.5/12	10.5/12	10.5/12/14	10.5/12/14	12/14/16	12/14/16
Speed	Lifting Speed	Full Load(m/min)	40	40	50	50	40	30
		No Load(m/min)	60	60	80	80	70	50
	Luffing Speed(m/min)		40	40	50	50	30	30
	Slewing Speed(r/min)		1/1.2/1.5	1/1.2/1.5	1/1.2/1.5	1/1.2/1.5	0.8/1	0.8/1
	Crane Traveling Speed (m/min)		25/30	25/30	25/30	25/30	25/30	25/30
Number of Wheels			16/20	20/24	24/32	32	32/40	40
Max.WheelLoad			250	250	250	250	300	300
Rail Type			QU80	QU80	QU100	QU100	QU100	QU100
Power Suppl			3 phase AC 380V 50HZ

Feature & Advantages

Company Strength

1. Industry Position

Founded in 2006, Dafang Heavy Machinery covers an area of 1,580 acres and employs over 2,600 people. With an annual sales revenue of 3.566 billion RMB, the company focuses on two main business sectors: lifting machinery and steel structures. Major products include single and double girder bridge and gantry cranes, electric hoists, steel structure bridges, prefabricated buildings, and industrial plants. Dafang serves critical sectors such as military industry, aerospace, nuclear power, offshore engineering, metallurgy, and mining. Its products are exported to over 100 countries and regions, including the United States, Russia, and Southeast Asia.

Annually, Dafang manufactures 30,000 single-girder cranes, more than 12,000 double-girder and gantry cranes, and 30,000 electric hoists. Based on production scale, sales volume, and brand recognition, the company ranks among the top three in China’s crane industry.

2. Core Technologies

Dafang’s R&D team consists of over 260 members, including 104 with senior or intermediate engineering qualifications. The company invests 3.8% of its annual sales into technology development. It has obtained 12 international invention patents, 50 national invention patents, 415 utility model patents, and achieved 43 scientific and technological milestones. Dafang was the first in the industry to adopt anti-sway and automatic positioning technologies.

In 2016, Dafang became the first enterprise in Henan Province to implement smart crane applications and to introduce remote monitoring technology. The company also developed the multifunctional brewing crane, filling a domestic market gap. In 2021, Dafang was the first in the industry to be certified for unmanned intelligent cranes. In 2022, it undertook a project for a tower crane at a commercial satellite launch site.

3. Manufacturing Capability

Dafang Heavy Machinery is equipped with advanced in-house designed manufacturing equipment, including 1,500-ton press grooving machines, extrusion machines, and roller machines. The company has established leading domestic workshops, including an electrical assembly line, steel pre-processing line, paint finishing line, and China’s first practical single-girder lean production line. Precision machinery includes imported German NILES CNC gear grinding machines and Japanese MAZAK machining centers.

Dafang strictly follows refined manufacturing processes, adhering to the principle of “doing it right the first time, zero defects.” This commitment to quality is deeply ingrained in every employee, ensuring that every product delivered meets the highest standards.

4. Service Assurance

Dafang upholds a “comprehensive, high-quality” service standard, providing users with fast, attentive, and thorough one-stop services. With 24/7 online support, choosing Dafang means complete peace of mind. Just tell us what you need—we’ll take care of the rest.

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