黑料吃瓜网

Core Principle

Generated using a high-pressure water pump High pressure Water flow, delivered through a high-pressure hose to the end of the pipe Special nozzle The nozzle converts the pressure energy of the high-pressure water into a high-velocity water jet (kinetic energy). This powerful water jet:

Impact force: ? Directly impacts blockages (grease, hair, sludge, tree roots, hard lumps, etc.), breaking them up and loosening them.

Shear force: ? The high-velocity water flow creates a shearing action on the surface of the blockage, peeling and cutting it.

Frictional force: ? The water flow moves at high speed along the pipe wall and the surface of the blockage, generating friction to remove deposits.

Suction effect: ? The water flow carries the broken-up blockage and accumulated material on the pipe wall forward, eventually flushing them out of the pipe.

Reverse jet force (for rear-spray nozzles): ? The nozzle design causes some of the water to spray backward, propelling the nozzle and hose forward automatically within the pipe, while simultaneously agitating the water flow.

Main Equipment Components

High-pressure pump:

The core power source, usually driven by a diesel engine or electric motor.

Provides a continuous and stable high-pressure water flow. Power and pressure range are selected according to application needs (household/commercial/industrial/municipal).

Water tank/water source:

Provides water for operation. This can be a built-in water tank or a connection to a tap/fire hydrant (ensure sufficient flow rate and pressure).

Clean water source is required to prevent sand and silt from damaging the pump or clogging the nozzle.

High-pressure hose:

Connects the pump and nozzle, delivering high-pressure water.

Made of multiple layers of synthetic fibers and steel wire, it has extremely high pressure resistance, wear resistance, and flexibility.

Length and diameter are selected according to the clearing distance and working conditions.

Nozzle:

The most crucial Component, directly affecting the clearing effect.

Various types:

Forward-spray nozzle: ? The water flow mainly sprays forward, used for strong impact and breaking up hard blockages ahead.

Rear-spray nozzle: ? The water flow mainly sprays backward and sideways (generating reverse thrust), used to propel the nozzle forward, remove deposits from the pipe wall, and flush away soft blockages (grease, sludge). Most common.

Rotating nozzle: ? The nozzle head can rotate 360 degrees, the water flow is in a rotating spray pattern, the cleaning effect is more uniform and thorough, especially suitable for pipe wall cleaning and complex blockages.

Rock drilling nozzle/root cutting nozzle: ? Has a very small spray hole and extremely high impact force, specifically used for cutting through tree roots, concrete blocks, and other extremely hard blockages.

Multi-directional nozzle: ? Combines forward and rear spray functions.

The size and angle of the spray hole determine the speed, impact force, and coverage of the water flow.

Spray rod/hose reel:

Handheld spray rod: ? Used for short distances, small diameters, or situations requiring delicate operation. The operator pushes it manually.

Hose reel: ? Used for medium to long distance clearing. The hose is wound on a reel and is retracted and released by mechanical or hydraulic drive.

Self-propelled nozzle system: ? Usually used with rear-spray nozzles, using the water's reverse thrust to automatically propel the hose inside the pipe. The operator only needs to control the direction and speed, saving effort and improving efficiency, especially suitable for long-distance main pipelines.

Accessories:

Pipe endoscope: ? Inspect the blockage location and nature before clearing, and check the effect after clearing.

Nozzles of different sizes and types: ? To deal with different blockages and pipe diameters.

Hose guide head/guide: ? Helps the hose enter the pipe mouth and bends smoothly.

Safety protective equipment: ? Goggles, gloves, waterproof clothing, safety shoes (high-pressure water is extremely dangerous!).

Drain cleaning machine trailer/truck: ? Integrated equipment for easy mobility.

Standard Operating Procedure

Safety preparation:

Wear complete personal protective equipment.

Check that the equipment (hose, joints, nozzle) is undamaged.

Set up warning signs to ensure the safety of the work area.

Confirm that the water source is sufficient and clean.

Site survey:

Determine the location of the blockage, the direction of the pipe, the diameter, material, and nature of the blockage (if possible, use an endoscope).

Select a suitable access point for clearing (inspection well, cleaning port, pipe opening).

Equipment Connection:

Connect the water source to the high-pressure pump.

Securely attach the selected nozzle to the end of the hose.

Connect the hose to the high-pressure pump outlet.

Equipment Startup and Pressure Adjustment:

Start the high-pressure pump.

Start with low pressure! ? Slowly increase the pressure to the appropriate working pressure. Pressure selection depends on the pipe diameter, type of blockage, and pipe material (avoid damaging old pipes).

Clearing Operation:

Manual Advancement (Handheld Nozzle): ? The operator carefully inserts the nozzle into the pipe entrance, gradually advancing and keeping the nozzle centered in the pipe, while continuously swinging or rotating the nozzle to ensure that the water flow evenly impacts the pipe wall and the blockage. If resistance is encountered, repeatedly advance and retreat to impact.

Self-Advancing (Reel):

Insert the nozzle into the pipe entrance.

Turn on the high-pressure water (using the rear-spray nozzle), using the recoil force to automatically advance the nozzle.

The operator controls the hose payout speed via the reel, maintaining appropriate tension to prevent the hose from knotting or bending excessively within the pipe.

At bends or when encountering resistance, manual assistance or pressure/speed adjustment may be required.

During advancement, the high-velocity water flow continuously flushes the pipe walls and breaks up the blockage.

Clearing Completion and Inspection:

When the nozzle reaches the other end of the pipe or inspection well, the blockage should have been flushed out.

Reduce pressure and slowly retract the hose (a low-pressure water flow can be maintained for continuous flushing at this time).

Key Steps: ? Use an endoscope to check the clearing effect and confirm that the pipe is completely clear and the pipe walls are clean and free of residue.

Equipment Cleaning and Storage:

Turn off the high-pressure pump and release system pressure.

Remove the nozzle and hose and rinse thoroughly with clean water.

Clean the equipment surface and store the tools.

Technical Advantages

Highly Efficient and Thorough: ? Can remove various types of blockages (soft, hard), especially effective against grease, roots, and accumulated sludge. It can also effectively clean pipe walls, restoring pipe flow capacity.

Environmentally Friendly and Safe:

Only uses clean water, no chemical solvents (avoids groundwater pollution, pipe corrosion, and health hazards).

Physical method of clearing, no harmful gases produced.

Wide Range of Applications: ? Can be used for various pipe diameters and materials (note pressure control).

Minimal Pipe Damage: ? Compared to traditional steel cable clearing, the water flow is relatively gentle, and with correct operation, damage to the inner pipe wall is minimal.

Long Clearing Distance: ? Equipped with a long hose and reel, it can clear main pipes up to hundreds of meters long.

Visual Management: ? Combined with an endoscope, it can accurately locate blockages and assess the clearing effect and pipe condition.

Limitations and Precautions

High-Pressure Danger: ? High-pressure water jets have extremely strong penetration and cutting capabilities, Extremely Dangerous ! Improper operation or equipment malfunction may cause serious personal injury (injection injuries, cuts) or property damage. Safety regulations must be strictly followed, professional training must be received, and qualified protective equipment must be worn.

Water and Electricity: ? The operating environment needs to pay attention to waterproofing, avoiding water splashing onto electrical equipment and causing electric shock accidents.

Working Environment: ? A large amount of wastewater and sludge will be produced, which needs to be properly handled (discharged into the sewage system or collected and treated). The site may be slippery and muddy.

Limited Effectiveness on Certain Blockages: ? For completely collapsed pipes, severely misaligned joints, or large solid foreign objects (such as bricks, tools) that are jammed, water pressure alone may not be able to solve the problem, and other methods (such as excavation, pneumatic breaking) may need to be used in conjunction.

Equipment Cost and Maintenance: ? The purchase and maintenance costs of professional high-pressure clearing equipment (especially large-scale municipal equipment) are high.

Operational Technical Requirements: ? Requires operation by trained professionals who understand pressure control, nozzle selection, and advancement techniques; otherwise, efficiency will be low or even damage the pipes.

May Cause Secondary Blockages: ? If broken blockages are not completely flushed out, they may reaccumulate downstream in the pipe.

Application Scenarios

Commercial/Catering: ? Restaurant kitchen grease trap connecting pipes, dishwashing sinks, bathroom pipes, floor drains.

Industrial: ? Production workshop drainage pipes, sewage pipes, cooling water pipes.

Municipal Sanitation: ? City sewer mains, rainwater pipes, manholes, and septic tank outlet pipes.

Property Maintenance: ? Internal drainage networks of residential areas, office buildings, and hotels.

Summary

High-pressure water jetting technology has become the preferred method for modern sewer maintenance due to its efficiency, environmental friendliness, versatility, and gentleness on pipes. Its core principle lies in using the physical action of high-pressure water jets to clear blockages and clean pipe walls. However, its high-pressure nature also presents significant safety risks; therefore, professional and standardized operation and strict safety precautions are paramount to implementing this technology. ? When selecting high-pressure water jetting services, it is essential to confirm the qualifications of the operators, the condition of the equipment, and the adequacy of safety measures.