What is the standard to check whether the small-sized concrete full-automatic loading mixer is qualified? For small-scale concrete mixer, its understanding is only one-sided. For example, the small-scale mixer truck sold in the market now with tank volume of 2-12 square meters is a more commonly used vehicle model. To buy a small-scale concrete mixer with good quality, it is necessary to reach the following technical standards It is a qualified mixer.
1. The overall dimensions of small mixer truck shall conform to the provisions of national standards. And according to the approved product drawings and technical documents.
2. The purchased parts and outsourcing parts of the mixer shall be provided with the product qualification certificate of the manufacturer and meet the requirements of the relevant standards. They can be assembled after passing the inspection of the mixer manufacturer.
3. The total mass of the full-automatic charging mixer shall not exceed the large value of the chassis, and the steering axle (wheel) load mass and roll stability angle shall comply with the provisions of GB7258.
4. The welding seam of mixer truck shall be uniform and straight. There should be no welding leakage, crack, central slag, burr on the surface and sand inclusion.
5. All exposed ferrous metal surfaces shall be rust proof. The exterior decoration paint shall be beautiful and elegant, in accordance with GB7258.
6. From the mixing truck feeding to the completion of conveying and unloading, the allowable specified time is 90mh, and the continuous transportation of the mixing drum is no more than 300 revolutions. When the mixer is running, the speed shall not exceed 50 km / h.
7. After the ready mixed concrete is transported to the delivery place at the specified stirring speed and delivery time, the concrete quality shall meet the requirements of national standards.
8. The size of the inlet hopper outlet of the mixer truck shall not be less than 650mm, and the height from the ground shall not be greater than 3.8m.
9. The discharge speed of the small mixer is not less than 0.65m3/min, and the discharge residual rate is less than 2-5%. The feeding speed of the mixer is not less than 2.7m3/min.
10. The braking performance of small concrete mixer truck meets the requirements of national standard. The noise outside the vehicle shall meet the requirements of national standard.
The above is about how to judge whether the quality of automatic concrete loading mixer truck is qualified or not. I hope it can help you.