OEM NPD Series Slurry Balance Pipe Jacking Machine Factory, Pricelist

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OEM NPD Series Slurry Balance Pipe Jacking Machine Factory, Pricelist

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Product Description

Diameter (mm)	Dimensions D×L (mm)	Weight (t)	Cutter disk			Steering Cylinder (kN × set)	Internal pipe (mm)
Diameter (mm)	Dimensions D×L (mm)	Weight (t)	Power (kW×set)	Torque (Kn·m)	rpm	Steering Cylinder (kN × set)	Internal pipe (mm)
NPD 800	1020×3400	5	75×2	48	4.5	260×4	50
NPD 1000	1220×3600	6.5	15×2	100	3.0	420×4	50
NPD 1200	1460×4000	8	15×2	100	3.0	420×4	50
N PD 1350	1660×4000	10	22×2	150	2.8	600×4	50
NPD 1500	1820×4000	14	30×2	150	2.8	800×4	70
NPD 1650	2000×4200	16	30×2	250	2.35	800×4	70
NPD 1800	2180×4200	24	30×3	300	2	1000×4	70
NPD 2000	2420×4200	30	30×4	400	1.5	1000×4	80
NPD 2200	2660×4500	35	30×4	500	1.5	800×8	80
NPD 2400	2900×4800	40	37×4	600	1.5	1000×4	80
NPD 2600	3140×5000	48	37×4	1000	1.2	1200×8	100

The NPD series pipe jacking machine is mainly suitable for the geological conditions with high groundwater pressure and high soil permeability coefficient. The excavated slag is pumped out of the tunnel in the form of mud through the mud pump, so it has the characteristics of high working efficiency and clean working environment. According to the different ways of controlling the mud on the excavation surface, the NPD series pipe jacking machine can be divided into two types: direct control type and indirect control type (air pressure composite control type).

Device positioning

Safe Tunneling Technology in Heterogeneous Ground

Geological condition

Soft soils, heterogeneous formations (sand, gravel, high permeability and high water pressure)

a. Direct Control Type

The direct control type pipe jacking machine can control the working pressure of the mud water tank by adjusting the speed of the mud pump or adjusting the opening of the mud water control valve. This control method is simple and convenient, and the failure rate is low.

b. Indirect Control Type

The indirect control pipe jacking machine indirectly adjusts the working pressure of muddy water tank by changing the pressure of the air cushion tank. This control method has a sensitive response and high control accuracy.

Key Features & Advantages

The automatic control air cushion can provide precise support for the tunnel face, so as to ensure the safety of tunnel driving to the greatest extent.
Tunneling can also be carried out when the water pressure is above 15bar.
Use mud as the main medium to balance the formation pressure on the excavation surface of the tunnel, and discharge the slag through the mud conveying system.
NPD series pipe jacking machine is suitable for tunnel construction with high water pressure and high ground settlement requirements.
High driving efficiency, safe and reliable, with two balance modes of direct control and indirect control.
The NPD series pipe jacking machine with advanced and reliable cutter head design and mud circulation.
The NPD series pipe jacking machine adopt reliable main bearing, main drive seal and main drive reducer, with long service life and high safety factor.
Self-developed control software system, the performance of the whole machine is safe and reliable, and the operation is convenient.
Wide applicable various soil, such as soft soil, clay, sand, gravel soil, hard soil, backfill, etc.
Independent water injection, discharge system.
The fastest speed is nearly 200mm per minute.
The construction of high precision, steering maybe the up, down, left and right, and the most steering angle of 5.5 degrees.
Use the central control system on the ground, safe, intuitive, and convenient.
A series of tailor-made solutions can be provided for different project requirements.

Frequently Asked Questions (FAQ)

Q What geological conditions are NPD series pipe jacking machines best suited for?

NPD series pipe jacking machines are mainly designed for challenging geological conditions with high groundwater pressure and high soil permeability coefficient. They perform excellently in soft soils and heterogeneous formations, including sand, gravel, and areas with high water pressure.

Q What are the differences between direct and indirect mud control modes?

Direct control type pipe jacking machines regulate mud water tank pressure directly via mud pump speed or the control valve, offering simplicity and low failure rates. Indirect control machines adjust the pressure via an air cushion tank, providing highly sensitive responses and high control accuracy.

Q Can the NPD series pipe jacking machine operate under extremely high water pressure?

Yes, the NPD series pipe jacking machine is designed to maintain tunneling operations even when the groundwater pressure exceeds 15bar.

Q What is the maximum speed and steering capability of the machine?

The NPD series machine can achieve a maximum driving speed of nearly 200mm per minute. For steering, it features high-precision guidance up, down, left, and right with a maximum steering angle of 5.5 degrees.

Q How does the machine handle soil balance and excavated slag?

The system uses mud as the primary medium to balance the formation pressure on the tunnel excavation face. The excavated slag is then pumped out cleanly and efficiently through the built-in mud conveying system.

Q How is the operation of the pipe jacking machine monitored?

The machine uses a self-developed control software system coupled with a ground central control system, providing operators with a safe, intuitive, and convenient operation interface.