A system is disclosed for conveying proppant from a container to fracking operation equipment. The system includes a proppant delivery assembly having a frame supporting the container adjacent a proppant mover having a conveyor, a shroud enclosing a portion of the conveyor, a proppant chamber coupled to the shroud and a chute coupled to the proppant chamber. The system also includes a dust collection assembly fluidly coupled to the proppant mover to collect the dust particles contained therein. The dust collection assembly includes an air mover, a hood with a dust receptacle, and ductwork coupling the air mover to the dust receptacle. An air flow is generated along a flow path through the dust receptacle and the ductwork to the air mover such that a suction pressure generated by the air mover is sufficient to only capture and remove the dust particles, thus reducing a risk of capturing the proppant.

A vehicle includes an engine, a drum, a drum drive system, and a control system. The drum drive system includes a pump configured to pump a fluid through a hydraulic system and a motor positioned to rotate the drum to agitate drum contents. The control system is configured to perform a calibration test to determine a baseline operating pressure of the fluid in the hydraulic system, perform a buildup detection test to determine a current operating pressure of the fluid in the hydraulic system, and determine that there is a buildup of the drum contents within the drum in response to a difference between the baseline operating pressure and the current operating pressure exceeding a threshold differential. In some embodiments, the calibration test and the buildup detection test are only performed if a temperature of the fluid exceeds a threshold temperature.

Embodiments of the present disclosure describe a system for capturing dust and dust-laden air caused by the agitation, movement or transfer of particulate material. The system includes a dust collection assembly positioned proximate and associated with the delivery of particulate material to capture dust particles released by movement and settling of the particulate material when being dispensed and delivered. The dust collection assembly is positioned to direct an air flow in a flow path overlying the dust particles to capture the dust particles and move the dust particles away from the proppant thereby reducing risk of dust exposure.

A FirePOD provides a self-contained, portable, standalone fire protection system that enables property owners, firefighters or others to mix and apply fire-protective gel or foam to entities such as structures, vehicles, vegetation, etc., to protect those entities from wildfire events or other external fire incidents. In various implementations, the FirePOD includes a recirculation-based mixing system for combining a mixture comprising a powder, liquid, or gel-based Thermal Protective Substance (TPS) with a volume of water or other liquid to produce the fire-protective gel or foam. By applying reconfigurable valves, one or more pumps are applied to both recirculate the mixture and, when sufficiently mixed, apply the resulting fire-protective gel or foam via one or more hoses or other dispensing mechanisms. In various implementations, the FirePOD is movable, and is manually or automatically propelled to locations suitable for applying the fire-protective gel or foam.

A proppant metering and loading apparatus for a hydraulic fracturing blender unit is provided. A continuous loop conveyor belt receives proppant from a source location on the blender, such as a hopper, and delivers the proppant to a blender device of the blender. A measurement device (e.g. weigh scale) measures and provides an indication of amount (e.g. weight, volume and/or density) of the proppant delivered to the blender device by the conveyor belt.

A feed mixer vehicle having a hopper with a base is carried on a chassis. A vertically extending auger assembly is rotatably mounted in the hopper adjacent the base, extending from the hopper base. A reduction gearbox assembly having a reduction gear train assembly is mounted adjacent the base of the auger assembly. The reduction gear train assembly has an input shaft and an output shaft, with the output shaft coupled to the auger assembly. The reduction gearbox assembly further includes a first planetary gear set assembly meshed with a second planetary gear set assembly, where the first planetary gear set assembly includes the input shaft and the second planetary gear set assembly includes the output shaft. Coupled to the input shaft of the reduction gearbox assembly is an axial flux motor assembly.

The disclosure herein describes a concrete mixing machine for indoor preparation of fluid concrete for disposition as flooring. The concrete mixing machine is capable of mixing of 23 bags of concrete concurrently. The concrete mixing machine produces a large batch of concrete, and the concrete mixing machine moves and deposits the concrete for application. The concrete mixing machine is hydraulically operated and self-propelled. The concrete mixing machine does not emit gases harmful to indoor air quality and thus is environmentally friendly.

The present invention discloses a novel sand mixing device, including an electric motor and a hydraulic system, wherein the electric motor is used as the power source of the hydraulic system, and the hydraulic system drives all the actuating elements in the sand mixing device. Beneficial effects: in the present invention, the traditional diesel engine drive mode is changed into a motor drive mode and a hydraulic system is maintained, and the power is all in the form of an electro-hydraulic system, realizing the advantages of environmental protection and energy saving with the electric motors as the power source, also taking into account the advantages of small size and flexible layout of the drive parts of the hydraulic system. Therefore, the issues of not environmental-friendly, large size, inconvenient transportation, well site layout, and maintenance in the application of traditional sand mixing device can be addressed.

A mixing drum includes a body defining a head aperture and a discharge aperture opposite the head aperture, a head coupled to the body and extending across the head aperture, a bearing member coupled to the body and defining a bearing surface surrounding the body, and a mixing element positioned within the volume and coupled to the body. The head and the body define a volume configured to contain a fluid mixture. The mixing element is configured to drive the fluid mixture toward the head when the drum is rotated in a first direction. The mixing element is configured to drive the fluid mixture towards the discharge aperture when the mixing drum is rotated in a second direction opposite the first direction. The head is made from a first material, and the body is made from a second material having a lesser density than the first material.

In accordance with one embodiment, a method is provided that includes providing a liquid nitrogen storage system configured to cool a supply of liquid nitrogen to a temperature below the vapor point of liquid nitrogen; coupling a piping system with the liquid nitrogen storage system to convey a portion of the supply of liquid nitrogen from the liquid nitrogen storage system; coupling the piping system with a liquid nitrogen control valve configured to control a flow of liquid nitrogen to at least one liquid nitrogen dispensing head; disposing the at least one liquid nitrogen dispensing head above a conveyance device operable to convey an aggregate stream of a concrete batching plant during use; and disposing the at least one liquid nitrogen dispensing head in a position to dispense an output flow of liquid nitrogen onto the aggregate stream of the concrete batching plant during use.