Driving type scraper suction machine

Driving type scraper suction machine is used for horizontal sedimentation in sewage treatment plants and water plants to scrape the sludge settled at the bottom of the tank to the pump suction port. The sludge is then sucked by the pump and discharged outside the tank, which can relieve the pain of cleaning the sludge at the bottom of the tank.

Structural principle

The driving scraper suction machine consists of 1 working bridge, 2 driving walking devices, 3 suction systems, 4 skimming devices (optional components), 5 electric control cabinets, 6 siphon generators (siphon mode), etc. When used in inclined sedimentation tanks, it is also necessary to install bottom suction racks and suction hangers.

Transmission device: It adopts a shaft mounted reducer as the driving power, installed on the two end beams of the crane, with dual drive, compact structure, and easy loading and unloading. It is equipped with an overload protection device, which plays a shutdown protection role when the equipment is overloaded (adjusting the compression spring to adjust the pre pressure).

Suction system: Four submersible sewage pumps are used as suction power, installed on the crane platform, and connected to the discharge pipeline. When the vehicle runs along the length of the pool, the submersible sewage pump sucks up the settled sludge at the bottom of the pool into the pipeline, and arranges it in the sludge tank through the discharge pipeline.

Skirting device: The suction dredger is equipped with a skimming scraper to collect the floating oil in the tank to both ends of the tank, and then discharge it through the oil discharge devices at both ends of the tank.

Sludge discharge pipeline: connected to a submersible sewage pump, used to discharge the sludge sucked into the pipeline by the sewage pump.

Hanger: connected to the crane platform, used to support suspended suction pipelines and scraper plates.

Scraper plate: used to scrape and collect sludge settled at the bottom of the tank. Its diamond shaped structure is more effective in scraping and collecting sludge. The bottom of the scraper plate is at a certain distance from the bottom of the tank to reduce the resistance of the equipment during operation and improve the fluidity of the sludge, making it easier for the submersible sewage pump to suction and discharge.

Electrical control box: This machine has manual, emergency stop, reverse, cut-off, delay and other control functions. In case of malfunction or maintenance reasons, the motor can be shut down by pressing the stop button to achieve emergency cut-off.

When the crane reaches both ends of the sedimentation tank, it can be stopped or run in reverse through limit switches. The control box is equipped with a delay device that can adjust the delay time to control the time interval of equipment operation. In addition, there is also the on/off and driving control of the suction pump, as well as the leakage protection function.

Travel control device: installed at both ends of the driving device, it collides with the limiting protons on the steel rail to achieve the reciprocating motion of the train.

This equipment is supported by a four point walking beam spanning across a horizontal sedimentation tank, driven on both sides, with steel rails laid on both sides of the tank. It runs from one end of the tank to the other, sucking mud while walking, hitting the stroke control, turning back to walk, and sucking mud back, completing one work cycle.

Parameter

install

（1） Precautions

In order to facilitate the normal operation of the suction machine, it is necessary to install the four walking wheels on the two parallel sides of the rectangle. The track steel must be on both sides of the rectangle and on the same horizontal plane.

（2） Installation steps

1. Reserve track steel embedded iron on both sides of the top wall of the horizontal flow pool, one meter per piece, and make bolts and pressure plates on both ends of each embedded iron to firmly press the steel rail.

2. Lift the equipment onto the leveling pool, place the four walking wheels on the steel rails, level them according to the reference line, and verify the installation dimensions.

3. Install sliding cables and electrical appliances, transfer the hanging cables into the steel wire rope with lifting rings, tighten the steel wire rope, and fix it on the columns at both ends. Connect the main cable, power on and adjust the walking situation, install the travel switch and touch block, and install the anti falling car baffle according to the return position.

4. Test drive, run the vehicle without interruption for at least 8 hours after installation, constantly check if there is any track drop during operation, and stop the vehicle promptly if found to prevent equipment from falling into the pool.

5. Installation of suction pump: Install the suction pump on the working bridge.

6. Installation of suction and discharge pipes, starting from the inlet of the suction pump and installing pipes and suction nozzles from top to bottom, with a distance of 10-20mm from the suction nozzle to the bottom of the pool. Several suction pumps are combined into one discharge pipeline and discharged into the sludge ditch outside the horizontal flow tank.

7. Connect the power supply of the suction pump.

8. After the water inlet test pump runs smoothly, inject water into the pool with a water level 30mm higher than the suction pump head. Turn on the pump while the water inlet is running and observe the discharge of the sludge outlet.