Tunnel Machinery Xtr4/230 Tunnel Roadheader

Host machine parameter

Overall length: 13.47/21(m)

Overall width: 2.2(m)

Overall height (body): 2.0(m)

Gross Weight: 58(t)

Cutting head undercover depth: 0.2(m)

Climbing ability: ±18°

Cutting hardness: ≤60(MPa)
Electronic control system

The electrical system of XTR4/230 TBM is mainly composed of switch box, operation panel, electric bell, emergency stop button, mine lighting, flameproof three-phase asynchronous motor for TBM, flameproof three-phase asynchronous motor for pumping station, flameproof electric drum (two-way motor), low-concentration methane sensor, etc. The switch box and operation panel used are small in size, light in weight, flexible in operation, safe and reliable, and the main controller is installed in a closed shell to effectively shield electromagnetic interference; LCD screen working condition display, operation interface menu, parameter setting flexible and safe; It has the functions of overvoltage, motor overload, phase loss, short circuit, overtemperature, leakage lockout and so on.

Electronic control system

Rated voltage: AC1140(V)

Rated current: 400(A)

Rated frequency: 50(Hz)

Number of output splits: 5

Rated power: 374(kW)

Monitor Monitor

Specification model: HD064MV2-D

Rated voltage: DC24(V)

Rated Power: 12(W)

Communication signal: CAN bus

Baud rate: 250 (kbps)

Communication distance: ≤15(m)
Stop button

Specification model: XB2BS542C

Rated voltage: DC24(V)

Rated current: 3(A)

Purpose: For emergency shutdown

Hydraulic system

The hydraulic system of XTR4/230 tunnel boring machine is mainly composed of oil cylinders (including: cutting head lifting cylinder, cutting head rotary cylinder, shovel plate cylinder, shovel plate telescopic cylinder, rear support cylinder, one-way tensioning cylinder, two-way lifting cylinder, two-transport rotary cylinder), motor (including: walking, star wheel, one-run), pumping station, control valve block and auxiliary components. The main hydraulic components are adopted international famous brands.

The hydraulic system of XTR4/230 TBM adopts constant power, pressure cut-off, load sensitive control, and adopts hydraulic oil air cooling and heat dissipation for the first time, eliminating hydraulic oil heating caused by insufficient water supply, effectively improving the life of hydraulic components and reducing system failure.

Anti-dusting spray system

The dust removal spray system is divided into water system and fan dust removal device. After the foreign water is filtered by backwashing, it passes through the ball valve and pressure reducing valve), and then leads to the water spray rack and is sprayed out by the external spray nozzle. A suction port is set in the cutting part, and the dust is treated by the wet dust removal device to achieve the purpose of dust removal.

Water system main parameters

Alien water: 80-100(L/min)

External spray pressure: 1-2(MPa)

Internal spray pressure: 3(MPa)
Fan main parameters

Handling air volume: 180(m3/min)

Dedusting efficiency: ≥97%

Fan power: 15(kW)

Fan voltage: 1140(V)

Water consumption: 20(L/min)

Cooling system

Air-cooled heat dissipation is adopted to dissipate heat from the cutting motor, hydraulic system, etc., and the host can work normally without an external water source.

The main parameter is main parameters

Coolant Capacity: 75(L)

Coolant pump flow: 50(L/min)

Quota pressure: 1 (MPa)

Cutting structure

The cutting mechanism is composed of cutting head, cutting arm, cutting reducer and cutting motor. The cutting head adopts small diameter cutting head and hard rock special picking; The cutting head is designed as a conical table-shaped double helix structure, and its circumferential helix distribution picks are picked, and the picks are made of hard rock picks, which are reasonably arranged and have strong rock breaking ability. The cutting head can realize two cutting modes, normal mode and hard rock mode, to adapt to different working conditions and improve cutting efficiency.
Cutting scope: Cutting scope

Height: 4.6(m)

Width: 5.1(m)

Acreage: 23(m2)

The main parameter: main parameter

Cutting head shape: conical table shape

Cutting head speed: 48/24(r/min)

Cutting motor: YBUD-230/135-4/8(1140)

Spray: Inner and outer spray

Shovel plate assembly

The shovel plate assembly is composed of the main shovel plate, the side shovel plate, the left and right drive device, the driven wheel device, etc. Two low-speed, high-torque hydraulic motors directly drive the curved four-tooth star wheel to load the cut material into the first conveyor. The blade has a retractable function front and rear, which is convenient for collecting front-end stacking, which is conducive to improving cutting efficiency and avoiding unnecessary wear of the cutting head.

Main parameters

Loading form: curved four-tooth star wheel type

Loading width: 2.2(m)

Star rotation: 33 (r/min)

Loading capacity: 3.0 (m3/min)

Blade expansion: 500 (mm)

The first freighter

The first transport aircraft is located in the middle of the fuselage and consists of a front chute, a rear chute, a drive device, and a tensioning device. The front chute of the conveyor is connected to the shovel plate through the pin shaft, and the rear chute is connected to the rear support to form a skid mechanism, and the first conveyor realizes follow-up when the shovel plate rotates. The hydraulic motor is used to directly drive the sprocket and drive the scraper chain to realize material transportation. The tensioning device adopts the structure of cylinder plate tensioning to adjust the tightness of the scraper chain.

The second freighter

The second conveyor is located at the rear of the body, and the material output by the first conveyor falls directly on the second conveyor, and the material is transported by the drum motor. The front end of the conveyor is connected to the rear support two-transport rotary table by a pin shaft, and can rotate up and down around the pin shaft. And through the cylinder to realize the lifting and slewing of the second transport.

Main parameters

Transportation form: belt type

Belt width: 800(mm)

Belt speed: 1.6(m/s)

Drum motor voltage: 1140(V)

Traveling mechanism: Traveling

The traveling mechanism is mainly composed of hydraulic motor, reducer, track chain, tensioning device, track frame, etc. The hydraulic motor drives the reducer, and the track chain is driven by the drive wheel to achieve walking. The roller type adopts a roller rolling type to improve the walking ability.
Main parameters

Track shoe width: 650(mm)

Braking method: Integrated multi-plate brake (built-in reducer)

Ground pressure: 0.145(MPa)

Walking speed: 6(m/min)

Tensioning form: cylinder tensioning

Safety devices

Total emergency stop button

Cut the emergency stop button

Motor start warning

Electrical blocking of oil pump motor and cutting motor

Main circuit adhesion latching protection

High-voltage leakage latching and low-voltage leakage protection

Motor overtemperature, overload, overcurrent, short circuit protection

Motor three-phase unbalance and phase failure protection

System overvoltage, undervoltage protection

Gas latching protection

Fuel tank oil level, oil temperature protection

Technical document

The XTR4/230 cantilever TBM offers the following technical documentation:

Product certificate

Packing slip

Transportation dimension and weight

Length 13470mm

Width 2200mm

Height (cutting head horizontally) 2200mm

Shipping weight (including second transport) 58000 kg

If there are restrictions on weight or overall height during transportation, it can be disassembled for transportation.