45results about "Hydraulic programme control" patented technology

A system and method that remotely monitors and controls proppant usage in a fracturing operation. The system and method allow operators to wirelessly monitor and control proppant storage units from inside a datavan through sensors and control mechanisms that interface with fracturing software to schedule the flow of the proppant. A sensor monitors the weight, container level, or volume of the proppant being used to keep the induced hydraulic fracture open. A serial to Ethernet converter converts this information and sends it wirelessly to a datavan. A user at the datavan controls the proppant usage through a display in the datavan of the storage units with the appropriate weight. The container monitoring software links with the fracturing software, providing real-time information about proppant usage so that the user can properly schedule proppant flow to the well through valves, conveyor belts, and other control mechanisms.

The die cushion force setting apparatus according to an aspect of the present invention allows die cushion forces (component forces) acting on plural driving shafts to be set easily, makes it easy to apply strong or weak die cushion forces to a complex-shaped drawn part in a plane of a cushion pad, and provides a smooth die cushion force distribution. An operator manually enters a total die cushion force, axial component force of a left front hydraulic cylinder, and center-of-force position by operating an input device. Based on the information entered via the input device, the numerical computing device B1 calculates axial component forces of three hydraulic cylinders through numerical computations. The one axial component force thus entered and three axial component forces thus computed numerically are set as the axial component forces of four hydraulic cylinders.

Disclosed are a concrete distributing device and a control method, a control system and an electrical control system for composite motion of a boom thereof. The control method comprises the steps as follows: calculating the flow of a boom pump when an operating handle sends a command; according to the command sent by the operating handle, calculating theoretical demand flow of all actuating mechanisms of the boom and theoretical control signals of all electronic proportional control valves; comparing the total theoretical demand flow of the actuating mechanisms with the flow of the boom pump; providing the theoretical control signals to all the electronic proportional control valves when the flow of the boom pump is greater than or equal to the total theoretical demand flow of the actuating mechanisms, otherwise, providing actual control signals smaller than the theoretical control signals to all the electronic proportional control valves and reducing the movement speeds of all the actuating mechanisms proportionally. In this way, when undersaturation of system occurs to the composite motion of the boom, the movement speeds of all the actuating mechanisms are reduced proportionally independent of the load difference of the actuating mechanisms, thereby ensuring that the boom can move in a motion track expected by an operator.

Apparatus is provided featuring a signal processor or processing module configured to receive signaling containing information about a pump no flow idle (NFI) state when the pump is running at a pump idle speed; and determine corresponding signaling containing information about whether the pump should remain in a no flow shutdown (NFSD) state or the pump NFI state, based upon the signaling received. The signal processor or processing module is configured to provide the corresponding signaling containing information about whether the pump should remain in the NFSD state or the NFI state.

The die cushion force setting apparatus according to an aspect of the present invention allows die cushion forces (component forces) acting on plural driving shafts (4a) to be set easily, makes it easy to apply strong or weak die cushion forces to a complex-shaped drawn part in a plane of a cushion pad (2), and provides a smooth die cushion force distribution. An operator manually enters (step S18A) a total die cushion force, axial component force of a left front hydraulic cylinder (4LF), and center-of-force position by operating an input device (A1). Based on the information entered via the input device (A1), the numerical computing device B1 calculates (step S18B) axial component forces of three hydraulic cylinders (4LB, 4RF, 4RB) through numerical computations. The one axial component force thus entered and three axial component forces thus computed numerically are set (step S18C) as the axial component forces of four hydraulic cylinders (4LF, 4LB, 4RF, 4RB).

A method for conducting a partial stroke test of an emergency shutdown valve includes receiving a request to initiate the partial stroke test from a user interface or another source, establishing a direct or an indirect wireless communication link with the emergency shutdown valve, and generating one or more commands of a digital industrial automation protocol to be transmitted to the emergency shutdown valve via the wireless communication link, so that a partial stroke test of the emergency shutdown valve is initiated in response to these commands.

The invention provides a multipoint incremental launching accumulative sliding construction method for steel roof truss. First, a slide support system of three chutes and six rails is set up; a high altitude assembly platform is set up beside the main structure; and a temporary support jig of the middle chute is set up along the midline of the main structure, using the concrete trough beam as theside chute. Then steel truss components are assembled on the ground, and are hoisted to the high altitude assembly platform to assemble a first sliding unit, and then the first sliding unit is connected with a hydraulic synchronous multipoint incremental launching mechanism; the hydraulic synchronous multipoint incremental launching mechanism consists of eight hydraulic crawl devices, three hydraulic pump stations and a synchronous incremental launching control system; after the first sliding unit is pushed, a second sliding unit is assembled and connected with the first sliding unit, and thena second time sliding is performed. Via such an assembly structure, the sliding movement is performed for n times, and then the backout bracket is unloaded, the high altitude assembly platform and the temporary support jig of the middle chute are dismounted. The invention solves the difficulty of safe and stable installation and emplacement in synchronous sliding of the steel roof truss, and at the same time reduces the engineering cost and shortens the construction period without affecting the construction of other structures.

A method for controlling the high-precision synchronous press-down at both sides of rolled plate features that a technique for high-precision two-stage synchronous control to press-down speed and the in-line real-time computer control to automatic complementary linkage of high-precision synchronizing are used. Its apparatus is composed of two high-precision two-stage press-down speed controlling mechanisms with hydraulic mechanism, computer, push-pull switching circuit and electro-hydraulic servo valve.

To utilize and protect a mechanical load torque range of a servo drive in combination with a pump, a control unit is given a target system pressure as a reference variable and an actual system pressure as a control variable. An electric motor torque acting on a pump of the servo drive is specified by the control unit to an electric motor of the servo drive, a volume flow at the hydraulic load is generated by the pump, by which a mechanical load torque sets it at the electric motor and the actual system pressure is produced in the hydraulic load via the volume flow. A dynamic system variable of the hydraulic system is transmitted to the limiting unit. The limiting unit limits the motor torque transmitted by the control unit to the electric motor as a function of the value of the system variable.

In one aspect, an actuator for actuating a device comprises driving means adapted to be operatively connected to the device, and operable to receive a reaction element for engaging the device. The driving means further comprises an output adapted to be operatively engaged with the device for actuation of the device whilst the reaction element is engaging the device.

A control of a full-automatic plastic filling and blowing and hollow molding machine of a PLC-high speed singlechip-PIC singlechip includes a PLC- high speed singlechip system which consists of a PLC,a high speed singlechip, a level conversion circuit and a current direction control circuit, a temperature control module which consists of a signal magnifying circuit of a N-path temperature sensorand a driving circuit of a N-path heating device, a hydraulic pressure control system which consists of a PIC singlechip and a driving system of a hydraulic pressure control device, a pneumatic control module and a control panel. The method of using the device of the present invention to automatically control the filling and blowing process of the full-automatic plastic filling and blowing and hollow molding machine includes obtaining the system information, controlling the mechanical motion, controlling the temperature during the process of filling and blowing and controlling a hydraulic pressure flux and constant current of electric current of an electro-liquid proportional valve, and the obtaining of the system information has two routes of a PLC control procedure and a touch-screen interruption disposal. The control has high automatization degree and reliability, friendly human-machine interface, high cost performance of the system and the simple, convenient and practical method.

A system for mounting an annular component on a shaft, comprising (a) a hydraulic nut having an annular coaxial cavity and a ring-like piston, displaceable within the cavity; (b) a displacement sensor for providing a displacement signal indicating the axial displacement of the piston within the cavity; (c) a wireless displacement transmitter for transmitting the displacement signal; (d) a pressure sensor for providing a pressure signal indicating a pressure within the cavity; (e) a wireless pressure transmitter for transmitting the pressure signal; (f) a pump arranged to pump fluid into the cavity; and (g) a remote control device having a communications device arranged to receive transmitted pressure and displacement signals, wherein the remote control device is arranged to output control information for controlling the pump.