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Water system ..................................................................... 5
Continuous Miner water system overview
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Water is supplied to the continuous miner for the following purposes:
■ deluge water fire protection
■ cooling water for motors, transformers, etc.
■ cooling water for dust suppression
■ air cleaning via the scrubber system
■ washdown hoses
The water supplied by the mine must meet the following requirements:
■ flow rate of 10 gpm minimum for cooling
■ total flow rate: based on customer dust plan
■ pressure of 250 psi (dynamic) minimum, 500 psi maximum
The manufacturer offers straight, left hand, right hand, or bi-directional cutter head spray manifolds. This section describes bi-direction sprays.
The schematics in this section are for reference only. Always refer to the schematic in the parts book for your machine.
Fig. 70: Water supply circuit Water supply circuit
The water pressure manifold supplies water to all the water circuits (Fig. 70). Mine water is connected to a ball valve typically mounted on the right rear corner of the machine. From the ball valve the water passes through a y-strainer, the cleaning side of which is connected to a ball valve with the right hand washdown hose attached. The water continues on to the water pressure manifold. For component location see Fig. 71.
Fig. 71: Scrubber and dust-cooling component locations
LH CH spray manifold 3/8” spray nozzle BD-3 spray pattern (Qty: 18)
1/2” 3-way ball valve
1/2” relief valve
3-unit GH spray manifold 3/8” spray nozzle BD-3 spray pattern (Qty: 3)
2-unit throat spray manifold 3/8” spray nozzle BD-3 spray pattern (Qty: 2)
Scrubber sprays 1/4” spray nozzle GG-10W spray pattern (Qty: 10) 1/2” ball valve RH CH spray manifold 3/8” spray nozzle BD-3 spray pattern (Qty: 16)
1/2” 3-way ball valve
1/2” relief valve
2-unit throat spray manifold (LH & RH) 3/8” spray nozzle BD-3 spray pattern (Qty: 9) Venturi spray 1912 #3 nozzle (Qty: 2)
1/2” NPT ball valve (Qty: 2)
Side spray manifold 1/2” 3-way ball valve 3/8” spray nozzle BD-3 spray pattern (Qty: 2)
Spray block manifold (Qty: 2) 3/8” spray nozzle BD-3 spray pattern (Qty: 2)
Mounted in sump box:1” NPT suction strainer-water only 1/4” flow control valve Spray nozzle HI/4 VV-110 08 (flat) spray pattern 1” jet pump
1/2” ball valve 1 NPT pressure regulator gauge Scrubber sprays 1 NPT 1/2” flow control valve Hyd piloted water valve Crawler spray nozzle HT/4 VV-110 08 1/2” female quick disconnect Hyd piloted water valve 1/4” flow control valve (Qty: 2) 1/2” ball valve scrubber water bypass 3/4” ball valve dust/water bypass Crawler spray nozzle HT/4 VV-110 08
0-1000 psi pressure gauge
1/2” ball valve 1” y-strainer 1/2” female quick disconnect
Fig. 72: Deluge water fire circuit Deluge water fire circuit
The deluge fire suppression circuit (Fig. 72) can be operated by manual or remote solenoid control (see Electrical section in this chapter). When the solenoid coil is energized, it shifts a spool, allowing hydraulic oil to travel to a 2-way, 2-position water valve. The hydraulic fluid shifts the spool, allowing the water to pass through it to the deluge fire spray manifolds. For the hydraulic portion of this circuit, see Fig. 68 in the Hydraulic section of this chapter. The water valve has a detent spool, which keeps the valve open. The 2-way, 2-position valve can be operated manually and is typically mounted on the left hand side of the machine. The valve must be manually reset to reset the fire suppression circuit.
In addition, there is a ball valve used to manually operate the fire suppression circuit typically located on the right rear corner of the machine. The valve must be manually turned off to reset the fire suppression system.
The optional left hand washdown hose water is supplied by the deluge fire suppression system.
The fire suppression circuit must be tested once per shift, minimum (see Maintenance section in this chapter).
For deluge water fire circuit component locations, see Fig. 73.
Fig. 73: Deluge fire component location
3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
Fire activation/ reset valve 3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
3/8” spray nozzle BD-10 spray pattern (Qty: 3) 3-unit fire spray manifold
1/2” ball valve fire activation
Scrubber sprays and sump dump circuit
The scrubber spray circuit (Fig. 74) can be operated by manual or remote solenoid control (see Electrical section in this chapter). When the scrubber spray solenoid coil is energized, it shifts a spool, allowing hydraulic oil to flow to the hydraulic pilot operated normally closed water valve. The hydraulic oil shifts a spool, allowing water to pass though it to the scrubber spray circuit. For the hydraulic portion of this circuit, see Fig. 68 in the Hydraulic section of this chapter.
There is a manual ball valve that is used to bypass the pilot operated water valve so that the miner can be operated until maintenance can be performed.
The scrubber sprays automatically turn on when the scrubber motor starts. They cannot be turned on or off from the radio.
There is a flow control valve that controls the cleaning sprays located in the scrubber duct work. The scrubber screen cleaning sprays are controlled by a pressure regulated valve with a gauge and an adjustable flow control valve. The pressure regulator is normally set at 50 psi.
The final portion of this circuit is used to empty the excess water from the scrubber sump box (slurry water). Located in the bottom of the scrubber sump box are a stir spray nozzle, a flow control valve, a jet pump, and a water strainer. The flow control valve is used to control the amount of water stirring, which keeps the water strainer from becoming clogged and keeps the jet pump clean to discharge the slurry water. The pressure regulator valve and gauge are used to operate this circuit, which is normally set at 75 psi.
Fig. 74: Scrubber sprays and sump dump circuit
Dust-cooling water supply circuit
The dust-cooling water circuit (Fig. 75) can be operated by manual or remote solenoid control (see Electrical section in this chapter). When the dust-cooling water solenoid coil is energized, it shifts a spool, allowing hydraulic oil to travel to the hydraulic pilot operated normally closed water valve. For the hydraulic portion of this circuit, see Fig. 68 in the Hydraulic section of this chapter.
There is a manual ball valve that is used to bypass the pilot operated water valve so that the miner can be operated until maintenance can be performed.
The dust sprays typically turn on when the cutter head starts. The sprays can be turned on or off from the radio.
The dust-cooling circuit described below is for a typical miner containing optional bi-directional spray manifolds and side sprays. The circuit for your machine may vary depending on your dust plan and unique requirements. Always refer to the schematic in your parts book for your machine.
Fig. 75: Dust-cooling water supply circuit
Dust-cooling left hand machine circuit
The dust-cooling left hand chassis circuit (Fig. 76) is supplied from the water pressure manifold. This circuit cools the left hand pump, tram, continuous loading arm (CLA) and left hand cutter head motors. A portion of the CLA motor cooling water is used for the gathering head pan sprays and the (optional) gathering head side sprays. A portion of the cutter head motor cooling water is used to supply the left hand throat spray manifold. The throat spray manifold helps keep dust from flowing up the conveyor as the coal is being transported.
The cooling water continues from the cutter head motor to a water input manifold. This portion of the circuit is equipped with an atmospheric relief valve in case pressure builds up from clogged spray nozzles.
A 3-way ball valve is used to turn off or on the chassis side sprays for the left to right cutter head spray direction. With the ball valve open, water supplies two manifolds: one mounted near the cutter head (spraying towards the front of the machine) and one mounted to the right (spraying toward and away from the left hand side of the cutter head). The side sprays assist airflow direction and dust control.
The dust-cooling circuit described below is for a typical miner containing optional bi-directional spray manifolds and side sprays. The circuit for your machine may vary depending on your dust plan and unique requirements. Always refer to the schematic in your parts book for your machine.
Fig. 76: Dust-cooling left hand machine circuit
Dust-cooling right hand machine circuit
The dust-cooling right hand chassis circuit (Fig. 77) is supplied from the water pressure manifold. This circuit cools the tram motor tram case, continuous loading arm (CLA) motor and right hand cutter head motors. A portion of the CLA motor cooling water is used for the gathering head pan sprays and the (optional) gathering head side sprays. A portion of the cutter head motor cooling water is used to supply the right hand throat spray manifold. The throat spray manifold helps keep dust from flowing up the conveyor as the coal is being transported.
The cooling water continues from the cutter head motor to a water input manifold. This portion of the circuit is equipped with an atmospheric relief valve in case pressure builds up from clogged spray nozzles.
A 3-way ball valve is used to turn off or on the chassis side sprays for the left to right cutter head spray direction. With the ball valve open, water supplies two manifolds: one mounted near the cutter head (spraying towards the front of the machine) and one mounted to the left (spraying toward and away from the left hand side of the cutter head). The side sprays assist airflow direction and dust control.
The dust-cooling circuit described below is for a typical miner containing optional bi-directional spray manifolds and side sprays. The circuit for your machine may vary depending on your dust plan and unique requirements. Always refer to the schematic in your parts book for your machine.
Fig. 77: Dust-cooling right hand machine circuit
Tram trickle circuit
The tram trickle circuit (Fig. 78) can be operated by manual or remote solenoid control (see Electrical section in this chapter). When the dustcooling water solenoid coil is energized, it shifts a spool, allowing hydraulic oil to travel to the hydraulic pilot operated normally closed water valve. For the hydraulic portion of this circuit, see Fig. 68 in the Hydraulic section of this chapter.
Water then flows through a flow control valve to left- and right-mounted crawler sprays. The sprays can be turned on or off from the radio.
The tram trickle circuit described below is for a typical miner containing optional bi-directional spray manifolds and side sprays. The circuit for your machine may vary depending on your dust plan and unique requirements. Always refer to the schematic in your parts book for your machine.
