39results about How to "Flexible flow control" patented technology

The invention relates to a three-dimensional waterpower vibrator for petroleum drilling, and belongs to the technical field of design of petroleum drilling tools. The three-dimensional waterpower vibrator is composed of a flow control valve, an axial vibrator, a filtering connector, a screw motor power connector and a hydraulic impulse generator. The three-dimensional waterpower vibrator is characterized in that the flow control valve is used for adjusting flow and speed of slurry flowing into the vibrator, the axial vibrator is used for generating displacement upwards along the axial direction, the filtering connector is used for filtering thick slurry components, certain differential pressure is formed in the screw motor power connector by the slurry entering the vibrator to push a rotor structure in a screw motor to rotate and eccentrically vibrate, and the hydraulic impulse generator generates vibration in the circumferential direction through changes of open area circulation between a stationary ring and a moving ring of a PDC thrust bearing. Through three-dimensional vibration simultaneously generated in the axial direction and in the circumferential direction, large well displacement and frictional resistance between a drill column and a well wall of a horizontal well can be effectively overcome, torque between the drill column and the well wall is reduced, jamming of a drilling tool is avoided, and the three-dimensional waterpower vibrator has the advantages that drilling efficiency is remarkably improved and drilling cost is reduced.

The invention discloses a cloud load balancing optimization method and system. Parameters in a cloud node, a virtual switch and a cloud host are configured respectively; the network card queue of thecloud node, polling threads of the cloud nodes, a DPDK port queue of the virtual switch, a vhost port queueof the virtual switch, network card queue of cloud host, and the load balancing service processes of the cloud host are in one-to-one correspondence, so that the data packet can be directly shared between the kernel layer of the cloud node and the load balancing service process of the cloud host; and meanwhile, the polling thread is bound with the cpu, and an active polling mechanism of the polling thread is adopted, so that the lock and the cpu context switch are eliminated. Compared with the prior art, the technical scheme provided by the invention has the advantages that the problems of long IO path of the traditional cloud load balancing network and low efficiency caused by data copying, lock overhead, CPU context switching and the like are solved, and meanwhile, the cloud load balancing has the characteristics of flexible flow control, thermal migration, elastic expansion andcontraction and the like. And high-performance cloud load balancing is realized.

The invention relates to a network flow control system and a network flow control method. The network flow control system comprises a UDP packet filter module, a flow control parameter update module and a TCP window shaping module, wherein the flow control parameter update module is used for receiving data packets of the system and calculating the flow control state, the UDP packet filtering ratio and the TCP window shaping ratio of the system according to the flow of the data packets and the flow control target set by the system; the UDP packet filter module is used for receiving the flow control state and the UDP packet filtering ratio, and filtering the UDP data packets flowing into the system according to the UDP packet filtering ratio when the flow control state is that the flow control is required; and the TCP window shaping module is used for receiving the filtered data packets, the flow control state and the TCP window shaping ratio and performing window shaping on the filtered data packets according to the size of the TCP windows of the data packets and the TCP window shaping ratio. The network flow control system and the network flow control method can be widely applied to network flow control systems.

The invention discloses a method for optimizing a grouped data service node router, a device and a system thereof; the method comprises the following: step one: a user is accessed to an AAA server for authentification; the AAA server authorizes the capacity of directly transmitting the specific application service flow to the user; step two: after the user is accessed successfully, a position message of the user is registered in a VOIP server; step three: when a certain user launches a call message to the VOIP server for calling another user, the VOIP server launches the call to another user according to a position registration message of another user; step four: after a call link is established between two users and when a grouped data service node receives the messages of a certain user, the messages which meet the condition of directly transmitting the grouped data service node are directly transmitted to another user through no Internet.

A communication apparatus includes a plurality of first queues to which priorities or predetermined bandwidths are assigned respectively, a plurality of second queues which are corresponded to any of the plurality of first queues and to which the priorities are assigned respectively, a first writing portion which writes data blocks into any of the plurality of second queues or any of the plurality of first queues which is not corresponded to the second queues in accordance with a rule, a second writing portion which reads the data blocks stored in the plurality of second queues in order of the priorities assigned to the second queues respectively, and writes the data blocks into at least one of the first queues which is corresponded to the second queues, and a transmitting portion which reads the data blocks stored in the plurality of first queues in order of the priorities assigned to the first queues respectively or at time intervals corresponding to the bandwidths assigned to the first queues respectively, and transfers the data blocks to the communication network.

The present invention discloses a plasma gasification furnace for treating hazardous waste and a process. The comprising plasma gasification furnace comprises a plasma gasification furnace body, wherein the plasma gasification furnace body comprises an integrally-formed cylindrical upper part, an inverted-circular-table-shaped middle part and a cylindrical lower part; both the inner wall of the upper part and the inner wall of the middle part are provided with calcium silicate plate layers, corundum castable layers and high alumina castable layers; and sum of thicknesses of the corundum castable layers and the high alumina castable layers are 300-500 mm. The inner wall of the lower part is provided with a calcium silicate plate layer, a corundum castable layer and a chrome-containing brick layer; and the sum of thicknesses of the calcium silicate plate layer, the corundum castable layer and the chrome-containing brick layer is 300-500 mm. A height ratio of the upper part, the middle part and the lower part is 70: (25-30): (30-35). The invention provides a plasma gasification process, which is good in raw material adaptability, advanced in technology, high in gasification efficiency and free of secondary pollution, for treating and utilizing the hazardous waste and equipment thereof.

The invention discloses a liquid methane deep supercooling and filling system and method based on anti-freezing control. The system comprises a ground liquid methane storage tank, a vertical liquid nitrogen bath type heat exchanger and an on-rocket liquid methane storage tank; the on-rocket liquid methane storage tank, a filling pipeline, an engine and other parts are pre-cooled by cold nitrogen after liquid nitrogen gasification before filling; during filling, a mode of filling while supercooling is adopted, a vertical liquid nitrogen bath heat exchanger is used for supercooling liquid methane to a 95K temperature zone, then the supercooled liquid methane enters a rocket storage tank, and the flow and the supercooling degree in the filling system are flexibly controlled through compositeadjustment based on pressure control and liquid level control; once it is detected that the liquid methane is frozen, pipelines are switched immediately, and high-pressure nitrogen is adopted for rapid rewarming melting treatment; and meanwhile, the gasified cold nitrogen is used for controlling the pressure of a gas pillow area of the on-rocket liquid methane storage tank and maintaining the supercooling degree of the liquid methane. According to the liquid methane deep supercooling and filling system and method based on anti-freezing control, the functions of liquid methane large supercooling degree acquisition, liquid methane supercooling anti-freezing control, self-adaptive adjustment of the supercooling heat exchanger to different flows and set temperature zones and the like are realized.

The invention relates to the field of discharge hoppers, in particular to a pneumatic feeding device. The pneumatic feeding device comprises a feeding box body, wherein a hinge shaft is arranged in the feeding box body; an observing barrel is arranged at the upper end of the feeding box body; a rotary hopper is arranged at a position parallel to the observing barrel, is hinged to the feeding box body through the hinge shaft, is positioned in the feeding box body and is conical; a feeding opening and a discharging opening are formed in the rotary hopper; the aperture of the feeding opening is greater than that of the discharging opening; a cylinder is arranged on the left side of the bottom of the feeding box body and comprises a piston and a piston rod; the piston rod is fixedly connected with the rotary hopper; a supporting mechanism is arranged on the right side of the bottom of the feeding box body and comprises a baffle and a supporting shaft; one end of the supporting shaft is fixedly connected with the bottom of the feeding box body; the other end of the supporting shaft is fixedly connected with the baffle; a through hole is formed in the right side of the feeding box body; and a limiting bolt penetrates through the through hole and is in threaded connection with the feeding box body. According to the scheme, fruits can be quantitatively conveyed, the conveying amount of the fruits can be adjusted flexibly, and meanwhile, the pneumatic feeding device is long in service life.

The invention provides a distributed power flow control device and method based on a voltage source inverter. The distributed power flow control device comprises a mechanical switch, a thyristor module, the voltage source inverter, a direct-current capacitor and a main controller. The mechanical switch and the thyristor module are connected in parallel to the alternating current side of the voltage source inverter; the direct-current capacitor is connected to the direct-current side of the voltage source inverter in parallel; the main controller is connected with the mechanical switch, the thyristor module, the voltage source inverter and an upper-layer controller to realize flexible power flow control over the high-voltage alternating-current power transmission line; and bypass protectionis conducted on the voltage source inverter through the mechanical switch and the thyristor module to avoid damage to the voltage source inverter. The current change rate of the thyristor module at the moment of closing is suppressed through a choke inductor, meanwhile, the current flowing through the voltage source inverter is filtered, overvoltage protection maloperation caused by high-frequency common-mode interference can be effectively avoided, and the whole power flow control device is small in size, low in cost and flexible to install.

An electromagnetic urea pump for diesel engine exhaust treatment comprises a shell and a rear cover. An inner cavity is formed between the shell and the rear cover, a push rod is arranged in the inner cavity, the outer circle of the push rod is sleeved with a base, an armature and a spring, the portion between the base and the armature is sleeved with a wire frame and a varnished wire, the portion between the armature and the wire frame is sleeved with an embedding sleeve, and an electromagnet shell is arranged between the wire frame and the shell. A valve seat and a valve deck are arranged at the front end of the shell, two valve plates are arranged between the valve deck and the valve seat, and a water inlet and a water outlet are formed in the positions, corresponding to the two valve plates, of the valve deck. A membrane is arranged between the valve seat and the shell and provided with a first sealing line and a second sealing line. After the varnished wire is electrified, a main magnetic circuit is generated, so that the armature is made to drive the push rod to move, the push rod drives the membrane to reciprocate, and the process is repeated to continuous spray urea. Electromagnetic induction is adopted to drive the membrane to reciprocate, and the electromagnetic urea pump for diesel engine exhaust treatment has the advantages that the structure is simple, lubrication is not needed during membrane operation, the overall size is small, flow control is flexible, using is convenient, and cost is low.

The invention relates to an automatic glue charging system. The automatic glue charging system comprises a material absorption tube, a material pressing tube and a vacuum system; the vacuum system comprises an inner cavity with changing volume under control, the material absorption tube communicates with the inner cavity through a first valve, and the inner cavity communicates with the material pressing tube through a second valve. According to the automatic glue charging system, glue materials can be automatically added, the stability of the glue materials is good, the liquid level of glue dipping is stable, the generation probability of bubbles is reduced, faults cannot be generated due to rubber, the fault rate is low, and the production efficiency is high; and labor cost is saved, thestructure is simple, manufacturing is convenient, and maintenance is facilitated.

The invention relates to a novel pipe throttling device for refrigerating, air conditioning and heat pump systems. The invention is to improve the control of the pipe throttling device to the refrigerant flow. The pipe throttling device of the invention leads in a middle pipe section consisting of positive magnetostrictive material (8), supporting material (10) and negative magnetostrictive material (9) between an inlet pipe section (1) and an outlet pipe section (2). When current is passed into a coil (3), a magnetic filed is generated; under the effect of the magnetic field, the positive magnetostrictive material (8) is extended and the negative magnetostrictive material (9) is shortened, so that the pipe wall of the middle pipe section bends to the center of the pipe and the circulation area of the refrigerant is reduced. When the current in the coil (3) is changed, the bending degree of the pipe wall of the middle pipe section is also changed, so as to flexibly control the flow when the refrigerant goes through the pipe throttling device.

The invention discloses a four-wheel hand sowing machine, which has the advantages of good using effect, light weight, flexibility, easiness in control and the like. The structure of the four-wheel hand sowing machine comprises double driving wheels, double tail wheels, a frame, a hopper, a sowing pipe, a handle, a hand brake, an opening controller, a furrower and a main plough share, wherein thetyre type double driving wheels are connected through a through shaft and fixed at the front end of a cross beam of the frame; a sleeve for adjusting wheel distance, a spring and a pin shaft are arranged on the through shaft; a traction rod is arranged at the top of the cross beam; the hopper is fixed on the frame, and the rear end of the frame is fixed on the sowing pipe; the sowing pipe is divided into two sections, wherein the upper end of the first section of the sowing pipe is connected with the handle, the lower end of the second section of the sowing pipe is fixedly connected with the main plough share and the furrower, and the double tail wheels are fixed on the first section of the sowing pipe through a connecting rod; an iron sheet of the opening controller is tightly attached to the upper end of a seed outlet on the wall of the hopper through an adjusting screw; and the operating end of the hand brake is fixed below the handle, a lever is arranged at the acting end of the hand brake and connected with a brake lining in the hopper, and the operating end is in contact with the acting end through a cam.