Method and apparatus for mixing and transporting concrete
阅读：909发布：2021-07-17
专利汇可以提供Method and apparatus for mixing and transporting concrete专利检索，专利查询，专利分析的服务。并且A concrete mixing truck complying with maximum permissible highway legal load limitations, a trailer towed by the truck, and pneumatic conveyor means to transfer from the trailer to the truck separated, premeasured ingredients for one or more subsequently mixed concrete batches. The trailer may also separately store cement for admixture with the other ingredients of the first batch within the mixing truck when the hauling distance is such that the concrete mixing time specifications would be exceeded if all of the ingredients of the first batch were added to the truck at the concrete plant. When the separately stored ingredients in the trailer are pneumatically conveyed into the mixing truck, the entire void region in the mixer is completely filled with cement blown in under pressure so that the cement is more uniformly dispersed and in a much shorter time than customary with present in-field concrete mixing apparatus.，下面是Method and apparatus for mixing and transporting concrete专利的具体信息内容。
1. A method for transporting and mixing Concrete comprising introducing into a mixing drum of a concrete mixing truck a first batch of concrete ingredients minus the cement ingredient of the first batch, introducing the cement ingredient of the first batch and ingredients for a second batch of concrete into separate containers on a wheeled trailer adapted to be drawn behind the truck, moving both concrete batches with the truck and trailer to a job site, conveying the cement ingredient of the first batch from the trailer to the mixing drum, mixing the first batch of concrete and delivering the same at a job site, thereafter conveying all of the separated ingredients for the second batch of the concrete from the trailer to the mixing drum, and mixing and delivering the second batch of concrete at a job site.
2. A method according to claim 1, further comprising pneumatically conveying the cement of both batches to the mixing drum.
3. A method according to claim 2, further comprising introducing low pressure air used to pneumatically convey the cement into the mixing drum to assist in dispersing the cement throughout the other ingredients of the other respective batch in the mixing drum.
4. A method of transporting and mixing concrete comprising loading into separate compartments on a trailer the ingredients for a batch of concrete, towing the trailer behind a concrete mixing truck having a mixing drum to a job site, discharging a first batch of concrete from said mixing drum, conveying the separated ingredients carried on the trailer to the mixing drum to form a second batch of concrete using an air stream to convey the cement ingredient from the trailer to the mixing drum, introducing a low pressure air stream directly into the mixing drum to assist in dispersing the cement throughout the other ingredients of the batch to facilitate mixing thereof, and delivering the mixed second batch at a job site.
5. A method according to claim 4, further comprising delivering water forming one of the ingredients of the second batch from the trailer to the mixing drum by introducing air pressure into a container containing the water.
6. Apparatus for transporting and mixing concrete comprising a mobile concrete mixer, a wheeled trailer having means for connection to said mixer, at least one aggregate bin on the trailer for storing a measured amount of concrete aggregates, said mixer being adapted to be charged with a first batch of concrete less the cement ingredient of the first batch, at least a pair of cement hoppers on the trailer, each containing a measured quantity of cement for a predetermined concrete batch, and conveyor means on the trailer for conveying from one cement hopper to said mobile concrete mixer the cement ingredient of a first batch, and upon discharge of said first batch, for subsequently conveying the contents of an aggregate bin and of another cement hopper to said mobile concrete mixer for use in preparing a second batch of concrete.
7. Apparatus according to claim 6, wherein said conveying means comprise an inclined endless conveyor element extending forwardly of the trailer and having an elevated discharge end for delivering aggregate from each aggregate bin to said mobile concrete mixer, and pneumatic conveyor means for delivering cement from said cement hoppers to said mixer.
8. Apparatus according to claim 7, wherein said pneumatic conveyor means is attached to said inclined endless conveyor and is elevatable therewith.
9. Apparatus according to claim 8, further comprising a blower element operatively connected to an exhaust duct for an engine of the mobile concrete mixer to supply pressurized air to said pneumatic conveyor means.
10. Apparatus for transporting and mixing concrete comprising in combination a concrete mixing truck having a mixing drum, and a wheeled trailer having means to connect the trailer to said truck, at least one aggregate bin on the trailer for storing a measured amount of concrete aggregate, at least two cement hoppers on the trailer each adapteD to contain a measured quantity of cement, at least one water tank on the trailer for containing a measured amount of water, first conveyor means extending from beneath a discharge opening of each aggregate bin forwardly of the trailer and having an elevated discharge end for delivering aggregate to said mixing drum, pneumatic conveyor means for delivering cement from each cement hopper to said mixing drum, said pneumatic conveying means having a discharge end extending into said mixing drum to supply pressurized air into said mixing drum.
11. Apparatus according to claim 10, further comprising a blower powered by exhaust gases from the engine of said truck to produce low pressure air for use in said pneumatic conveyor means, and means to introduce a portion of said low pressure air into the top of each of said cement bins to force the cement into said pneumatic conveying means.
12. Apparatus according to claim 10, further comprising a discharge gate associated with each aggregate bin, a discharge valve associated with each water tank, and means for supplying high pressure air from the brake system of said truck for use in actuating each discharge gate and each water tank discharge valve.
13. Apparatus according to claim 10, further comprising a pair of aggregate bins positioned adjacent to each other on the trailer, one of said aggregate bins having a sloping rear wall, and a plurality of water tanks positioned adjacent to said sloping rear wall, and wherein said pneumatic conveyor means is attached to said first conveyor means and elevatable therewith.
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