A material (e.g., proppant) handling system includes a storage container, a mechanical conveyor system, and a pneumatic conveyor system. The mechanical conveyor system is configured to convey material from an unloading station to a conveyor system discharge and into an inlet of the storage container (e.g., at an elevation that is higher than the unloading station). The pneumatic delivery system is configured to deliver material from the storage container to an off-system destination (e.g., a silo or the like), pneumatically. In a typical implementation, the storage container, the mechanical conveyor system, and the pneumatic conveyor system are all on, or connected to, or supported by one common chassis.

A flexible tank is used to transport bulk liquids or semi-liquid materials inside of a multi-modal shipping container. It has water proof inner layers and an outer layer, which are formed and welded together to have seams at both ends of the flexible tank. A discharge valve is provided at one end of the flexible tank and an additional piece of material, referred to as a cape, is attached at the other end of the flexible tank. The flexible tank is situated in the container so that the end with the discharge valve is at the container opening and the end with the attached cape is at the rear of the container. The cape can be used by equipment positionable at the opening of the container to completely discharge the bulk liquids or semi-liquid materials from the flexible tank by pulling and winding up the cape and the layers of the flexible tank from the rear of the container.

A flexible tank is used to transport bulk liquids or semi-liquid materials inside of a multi-modal shipping container. It has water proof inner layers and an outer layer, which are formed and welded together to have seams at both ends of the flexible tank. A discharge valve is provided at one end of the flexible tank and an additional piece of material, referred to as a cape, is attached at the other end of the flexible tank. The flexible tank is situated in the container so that the end with the discharge valve is at the container opening and the end with the attached cape is at the rear of the container. The cape can be used by equipment positionable at the opening of the container to completely discharge the bulk liquids or semi-liquid materials from the flexible tank by pulling and winding up the cape and the layers of the flexible tank from the rear of the container.

A system includes first and second sensors, and a controller. The first and second sensors are operable to attach to a water tank that supplies a building with water. The first sensor is configured to determine that a water level in the tank has fallen below a first level. The second sensor is configured to determine that the water level has risen to at least a second level. The controller includes a processor that is communicatively coupled to the sensors. The processor receives, from the first sensor, an indication that the water level has fallen below the first level. In response, the processor generates a signal to activate a pump that delivers water to the tank. The processor additionally receives, from the second sensor, an indication that the water level has risen to at least the second level. In response, the processor generates a signal to deactivate the pump.

A support apparatus includes a frame assembly with an elevated load surface for supporting a modular proppant container in a position above a ground level. A chute assembly is supported by the frame assembly beneath the elevated load surface. A gate actuator has a coupling configured to engage with a gate assembly of the modular proppant container supported on the elevated load surface and a drive mechanism extending between the frame assembly and the coupling to selectively position the coupling for adjusting the gate assembly. The support apparatus may include a base frame section having a recessed region beneath the elevated load surface providing a feed station, an on-board subsystem attached to the frame assembly for operating the support apparatus in a stand-alone mode or an in-situ weigh station configured to measure the weight of the modular proppant container supported on an elevated surface in the rectangular container bay.

A support apparatus includes a frame assembly with an elevated load surface for supporting a modular proppant container in a position above a ground level. A chute assembly is supported by the frame assembly beneath the elevated load surface. A gate actuator has a coupling configured to engage with a gate assembly of the modular proppant container supported on the elevated load surface and a drive mechanism extending between the frame assembly and the coupling to selectively position the coupling for adjusting the gate assembly. The support apparatus may include a base frame section having a recessed region beneath the elevated load surface providing a feed station, an on-board subsystem attached to the frame assembly for operating the support apparatus in a stand-alone mode or an in-situ weigh station configured to measure the weight of the modular proppant container supported on an elevated surface in the rectangular container bay.

A fluid discharge system and the squeezer, where the squeezer includes a pair of rollers, a driving device, and a mounting bracket. The pair of rolling shafts is rotatably mounted to the mounting bracket, and each rolling shaft has a mounting parts at both ends and a squeezing segment between the mounting parts. The squeezing segment includes a supporting shaft and an elastic body provided around the supporting shaft. A pair of rolling shafts can operatively clamp the object to be clamped between the squeezing segments and can rotate oppositely through a driving device to apply a squeezing force to the clamped object. The driving device includes a motor, wherein the motor is mounted around the rolling shaft. The fluid discharge system and the squeezer are a zero-residue discharge system without liner suspension, have a long effective squeezing length, and are easy to operate.

A fluid discharge system and the squeezer, where the squeezer includes a pair of rollers, a driving device, and a mounting bracket. The pair of rolling shafts is rotatably mounted to the mounting bracket, and each rolling shaft has a mounting parts at both ends and a squeezing segment between the mounting parts. The squeezing segment includes a supporting shaft and an elastic body provided around the supporting shaft. A pair of rolling shafts can operatively clamp the object to be clamped between the squeezing segments and can rotate oppositely through a driving device to apply a squeezing force to the clamped object. The driving device includes a motor, wherein the motor is mounted around the rolling shaft. The fluid discharge system and the squeezer are a zero-residue discharge system without liner suspension, have a long effective squeezing length, and are easy to operate.

A momentum arresting ramp that includes a plurality of steps that each includes a slider receiving surface and a transition surface. The steps may enable a device with wheels to be moved down the ramp by a user, without inconvenient gravity building momentum of the device down the ramp. For example, the steps may be spaced apart along a first axis such that a first slider of the device is never in contact with one of the transition surfaces when a second slider of the device is in contact with another one of the transition surfaces. The configuration of the steps and the sliders may enable the device (e.g., a device heavy enough to typically require two users to unload using a planar ramp) to be easily and conveniently unloaded by a single user.

In accordance with presently disclosed embodiments, systems and methods for efficiently managing bulk material and dry additives to be mixed with bulk material in a blender are provided. The disclosed systems include a modular portable container that can be used to hold multiple types of dry flowable material for transportation about a work site. The different types of dry materials can be selectively released from the modular container for mixing with liquid and bulk material in a blender. The modular container generally includes a base structure that supports a number of individual, separable, and fully enclosed compartments. The compartments may each hold a different type of dry material, and the compartments may be arranged onto the base structure adjacent one another and removably secured to the base structure so that the compartments can be transported as a single unit about the work site.