Derusting sand blasting machine - pressure sand blasting machine - manual sand blasting machine - open sand blasting machine - dry sand blasting machine - high pressure sand blasting machine - anti-corrosion cleaning equipment - pre-treatment equipment

Pressure mobile sandblasting machine is a pre-treatment machine for engraving and thermal spraying. It is powered by compressed air and sprays clean and dry abrasives at high speed on the surface of the workpiece to be sprayed to achieve surface cleaning, texturing, engraving marks, etc. If required, it can also carry out paint removal, weld rust removal, preparation of frosted glass and other workpieces for spraying (atomization) treatment, the effect is very significant, the cleaning level reaches SA2.5-3.0, and its roughness meets the process requirements. The product has the characteristics of wide range of uses, compact structure, simple maintenance and convenient use. It is a necessary machine for thermal spraying (welding) various anti-corrosion layers.

  The control system of the pressure-maintaining pressure mobile sandblasting machine is composed of an inlet shut-off valve (basic type is a ball valve) and a sand-adjusting valve assembly.

  The feature of this model is that the air shut-off valve (4 intake valve) and the sand control valve (8) must be activated every time they are switched on and off, the gas in the sandblasting cylinder will increase and discharge, and every switch is There is a certain period of time, because the operator can put down the spray gun after all the gas in the sandblasting cylinder is exhausted.

  Due to the manual abrasive valve is used, the sand control valve is normally open when it is turned off, so every time it is switched on, a certain amount of sand will be stored in the sand pipe, and there will be an instantaneous pulse when the gun is fired. After the sand is emptied, the sandblasting gun can blast normally, and a delay period of 5-10 seconds is required.

If it is necessary to shut down and stop working, first close the intake valve, and then close the sand adjustment valve (8) (or the falling sand ball valve) at the bottom of the sand tank, and close the side air valve-ball valve after the residual sand and air in the sand pipe are exhausted. (4A), the spray gun can be put down to ensure safety.

 

一、System parameters, precautions and requirements of this model:

1 Main technical parameters of the equipment:

Cylinder diameter: 900mm -2100MM      Sand blasting efficiency: 15-35 square meters/H (depending on the size of the pipe used and the pressure of the air source)

Cylinder height:1700-2200mm        Sandblasting grade:SA2.5-3.0

Allow    积:0.8-1.0立方    consume Air volume: ≥3立方/min (8MMspray gun)

Air source pressure: 0.6-0.7Mpa (8KG)  The pressure should not exceed 8KG 35HP（8MMmuzzle）/50HP（10MMmuzzle）/75HP(12MMmuzzle)

design pressure：8.8KG   experimental pressure：1.15MPA（11.5KG） Features: low failure rate, less wearing parts, less investment, high efficiency, fixed structure, fixed-point sandblasting room use.

        

 

 

 

 

 

 

 

 

 

Sand pot seal mushroom head size:                  Replacement time: can not be sealed or leak must be replaced

Sand Tank Seal O-Ring Dimensions:                  Replacement time: can not be sealed or leak must be replaced

Diameter of sand mouth at the bottom of the tank: 2 inch internal thread    

Sand control valve: 2 inch threaded male interface               Replacement time of the rubber core in the valve: Replace once every 600-800 hours

Side main pipeline: 1-1/4 inch water pipe (one inch two)    Ball valve: 1-1/4 inch internal thread straight ball valve

Sand Pipe Fitting: 1-1/4 inches dragon catch            Sand Gun Connector: 1-1/4" Internal Thread  fine teeth

Sandblasting Gun: 1-1/4 inches Fine teeth single air inlet throat diameter 10MM  gun material: outer steel sleeve inner high temperature sintered boron carbide nozzle

Air supply pipe requirements: inner diameter≥32MM

Sandblasting pipe requirements: inner diameter 25MM or 32MM  high wear-resistant and pressure-resistant sandblasting pipe, pressure resistant10mpa.

 

2Advantages of this machine：

1．Compact structure, superior performance, simple and convenient operation;

2. The design and production of the cylinder body conform to the pressure vessel standard, which is safe and reliable.

3. Using standard general parts, easy to replace, lower cost, especially the separation of wear parts and fixed parts, and the addition of wear parts in the middle, effectively reducing the cost of replacement loss;

4．It can be modified and installed at any time with instant control function, using electric control or pneumatic control to meet the different needs of customers, and can be operated by a single person.

5. The shell is thickened and sprayed with anti-rust paint, which is beautiful and practical. .

 

 

3Abrasive particle requirements:

Sand for sandblasting and rust removal requires hard particles, angular, dry and free of soil and other impurities; the standard is brown corundum grain sand, and the economical price is quartz sand, and coarse river sand is also acceptable; at the same time, sand should be considered Material transportation conditions, unit price, recycling capacity and other factors; the particle size of sand material should be 0.5 ~ 1.5mm, it must be dried before screening, and stored in the shed or indoors. Diameter 1.2mm), fine sieve 372-476 holes (particle size 0.3mm)

When adding sand to the sand tank, the top of the tank should be covered with a screen of 16# or more to screen the sand particles to prevent foreign matter from falling into the tank and causing blockage of the sand valve or nozzle.

 

4Air source requirements:

 

 

Power Comparison:  35HP (using 8MM nozzle)/50HP (using 10MM nozzle)/75HP (using 12MM nozzle)

 

Compressed air must be processed by cooling device and oil-water separator to ensure dry and oil-free;

The oil-water separator must be cleaned regularly;

Generally, the air pressure of the air compressor is 6.0×105～6.5×105Pa, and the pressure variation is0.5×105～1.0×105Pa。

Generally, the air pressure of the sand bucket is 4.5×105～5.5×105Pa, not less than4.0×105Pa。

 

If the pressure of the sand tank exceeds 0.7MPA, please stop the gas supply, and exhaust the gas in the tank, check the cause and deal with it.

 

二、use
1、Prepare

Rust Removal Sandblasting MachinePre-operational protection requirements:

Inspection - The non-blasted parts should be shielded and protected before blasting.

Check - before sandblasting, whether the various pipes and control valves of the sandblasting machine are well connected, and whether they are in the appropriate switch positions - the sand adjustment valve (8) and the intake valve (4) must be in a closed state, and the exhaust valve (17) must be in a closed state. ) is closed.

Check - whether the protective tools, safety belts (ropes) and oxygen supply devices worn by the blaster are safe and reliable, and the wear of the nozzles (when the orifice

The nozzle should be replaced when the diameter increases by 25%）。

 

Connect each connection road and all pipelines according to the diagram, and check whether they are firm and sealed.

Check - whether the pneumatic control system is normal and whether the manual switch is normal.

Check - the exhaust valve is closed.

 

1）Use an air hose to connect the sandblasting machine to the air source, and make sure that it is fastened correctly (use a special joint to connect and fix it, and add an iron wire to pull the air tube) to prevent the tube from falling off.
2) Connect the sandblasting pipe to the quick connector at the outlet end of the abrasive valve, and lock it (lock the hole with a screw after the dragon grip is docked) to prevent the sand pipe from falling off during use, resulting in accidental danger.
3) Put clean and dry abrasives into the sandblasting machine barrel. (It is easy to add sand within 2/3 of the sand tank)
4) Start the air compressor to make the indicated pressure reach the required working pressure, and place the air compressor on the upper air outlet of the sandblasting machine to prevent the dust caused by sandblasting from being sucked into the air compressor.

5）Wear sandblasting protective equipment.

2、Operation control of steel structure descaling sandblasting machine：

1）First turn off the side trachea ball valve switch (4A), and close the tank bottom sand control valve or ball valve (8) at the same time, and the sandblaster holds the sandblasting gun to prepare for work.
2) Turn on the air source of the air compressor, turn on the switch (4) of the air inlet valve, the air source of the air inlet valve is connected, and the air intake starts in the cylinder;

Please observe the pressure gauge, the normal pressure value is in the range of 4-6MPA, if the pressure of the pressure gauge is too large, exceeding 7MPA, please stop the gas supply, and drain the gas in the tank, check the cause of the excessive pressure value, and contact the supplier (air compressor or sandblasting machine) consulting related matters;

3)After ventilation, high-pressure air enters the sand cylinder, pressurizes the cylinder, the umbrella-shaped sealing valve on the top automatically lifts up to seal the feed port, the pressure in the sandblasting machine continues to rise, and the sandblasting gun can automatically enter the state of preparation for sandblasting. At this time, the sandblaster should hold the spray gun tightly and be ready to blast at any time.

4）Turn on the side trachea ball valve switch (4A), air comes out from the spray gun, then open the sand valve ball valve (8) at the bottom of the sand tank, and sand blasting starts.

 

During sandblasting operation, according to the sandblasting state, adjust the handle on the abrasive valve (sand valve ball valve 8 at the bottom of the sand tank) to adjust the size of the abrasive outlet flow (close in the horizontal direction, fully open in the vertical direction), and the flow rate of the abrasive It should not be too large. Observed under the sun or other bright light sources, the air flow containing abrasives is not much different from the pure air flow。

5) At the end of the job, the blaster still needs to hold the gun tightly, and another assists the blaster to shut down the machine.

 

Close the ball valve switch (4) --- close the sand valve ball valve (8) at the bottom of the sand tank --- close the side trachea ball valve switch (4A)

 

At this time, the sandblasting gun slowly and automatically stops the sandblasting work. The sandblaster needs to wait for the residual sand and air in the sand pipe to be exhausted before putting down the gun to ensure safety.

 

After all the processes are completed, there is still high-pressure gas in the sand tank. After a short pause, you can continue with steps 1)-4) for sandblasting. If it is necessary to stop, manually open the exhaust ball valve (17) on the top side of the sand tank to discharge the gas in the tank.

 

Sandblasting distance: The distance between the gun and the surface of the base steel during sandblasting is preferably 100-300mm.

 

Sandblasting angle: the angle between the spraying direction and the normal to the surface of the base steel is preferably 15° to 45°.

 

After sandblasting and rust removal, before proceeding to the next process, in case of rain or other conditions that cause the surface of the base steel to be wet, after the environment reaches the construction conditions, dry the surface moisture with dry compressed air before sandblasting construction. . If it is necessary to re-blast, the abrasive requirements cannot be reduced, so as not to reduce the roughness and cause low adhesion of subsequent spraying.

 

After the blasting operation is completed, turn off the main air source of the air compressor, stop supplying air to the air compressor, open the air compressor exhaust valve, and discharge the residual gas in the air compressor. Turn off the power and turn off the air compressor. If the sandblasting machine is not used for a long time, it is necessary to clean the remaining abrasive in the cylinder to prevent wet agglomeration or sand blocking.

 

 

3. Shutdown
   When the sandblasting machine needs to be shut down for a long time, the abrasive in the barrel should be cleaned to prevent the abrasive from being damaged due to moisture when it is reused. The steps for cleaning the abrasive are:
1. Remove the nozzle.
2. Place the blast hose in a container.
3. Close the side air valve (4a) and the exhaust valve (17) and open the abrasive valve to the maximum extent.
4. Open the intake valve (4) and let the sandblasting machine work until the excess abrasive in the cylinder is drained cleanly, then open the side air valve (4a) to blow out the abrasive in the sand pipe.

   When the sandblaster is placed outdoors at night, it should be covered to prevent water from entering the bucket.

四、Maintenance
1、Replace the closing valve (umbrella bucket))
   Open the access valve, use a small pipe wrench to unscrew the connections (conduit) under the conical closure valve (umbrella bucket), and remove them from the bucket. After replacing with a new closing valve, install it as it is. Install the inspection hole cover and tighten all screws.
2、Replace the inlet seal
   Use a fingernail or screwdriver to gently remove the old seal and press the new seal into the sealing seat.
3. Regularly check the lubrication and wear of O-rings, pistons, springs, gaskets and other parts in the intake valve (air shut-off valve) and exhaust valve。

五、troubleshooting
1、Blocking
1) There is neither abrasive nor air at the nozzle outlet
Close the intake valve (4), open the exhaust valve (17), and after the blasting machine is depressurized, check whether the nozzle is blocked, if the blockage needs to be cleaned, you can continue blasting;

2）With air without abrasive
If the nozzle is not blocked, it may be blocked at the sand adjusting valve or the sand opening under the tank bottom. It is necessary to disassemble the sand valve to check, discharge foreign matter, and continue sand blasting after reinstalling the sand valve.

Open the abrasive valve to the maximum limit, open it quickly and then close the main intake valve (4) immediately, then quickly open the main intake valve (4), cycle many times, and use the pulse force to impact the blockage. If this method does not work, It needs to be disassembled for inspection.