What is the standard to check whether the concrete mixer is qualified or not. For the concrete mixer, its understanding is only one-sided. For example, the small mixer truck on the market with a tank volume of 2-12 square meters is a more commonly used vehicle model. To buy a small-sized concrete mixer with good quality, it must meet the following technical standards before it can be regarded as a qualified mixer 。

一、检查小型混凝土搅拌车是否合格的标准

1、 Standard for checking whether small concrete mixer truck is qualified

1、小型搅拌车整车的外廓尺寸应符标准的规定。并按批准的产品图样及技术文件制造。

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、搅拌车外购件、外协件均应有制造厂的产品合格证，并符合相关标准的要求，经搅拌车生产厂检验合格后方可装配。

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、搅拌车厂家定总质量不得超过底盘的许用值，转向轴(轮)载质量和侧倾稳定角应符合GB7258的规定。

3. The maximum total mass determined by the mixer manufacturer shall not exceed the maximum allowable value of chassis, and the steering axle (wheel) load mass and roll stability angle shall comply with the provisions of GB7258.

4、搅拌车焊缝应均匀、平直、无漏焊、裂纹、央渣、表面应无毛边，包砂等现象。

4. The welding seam of mixer truck shall be uniform, straight, free of missed welding, crack, central slag, and the surface shall be free of burr and sand inclusion.

5、所有外露黑色金属表面均应作防锈处理。外表装饰漆应美观大方，符合GB7258的规定。

5. All exposed ferrous metal surfaces shall be rust proof. The exterior decoration paint shall be beautiful and elegant, in accordance with GB7258.

6、从搅拌车进料到输送卸料完毕，允许的长时间为90mh，且搅拌筒按规定连续运输不大于300转。搅拌车行驶时，车速不得超过如50km/h。

6. The maximum allowable time from the mixing truck feeding to the completion of conveying and unloading is 90mh, and the continuous transportation of the mixing drum is no more than 300 revolutions. When the mixer is running, the maximum speed shall not exceed 50 km / h.

7、装入预拌混凝土在规定的搅动转速和输送时间运送到交贷地点后，混凝土质量应符国标要求。

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、搅拌车的进料斗出口尺寸不小于历650mm，距地面高度应不大于3.8m。

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、小型搅拌车的出料速度不小于0.65m3/min，出料残余率小于2-5%。搅拌车的进料速度不小于2.7m3/min。

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、小型混凝土搅拌车制动性能府符合国标规定。行驶车外噪声应符国标要求。

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.

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