38results about How to "High pumping pressure" patented technology

A liquid pumping apparatus for pumping liquids, more specifically a linear peristaltic pump apparatus. The apparatus consists of a high durometer compressible elastomeric liquid flow tube (12), an infeed valve assembly (26), an outfeed valve assembly (38), an extensible and retractable actuator anvil (34) having a round surface which engages the flow tube (12) at all times, an opposed anvil (24.1) having a round surface in engagement with the flow tube at all times, the flow tube being held between the anvils (34, 24.1) in a slightly compressed state when the anvil (34) is retracted, and a control assembly (100) for causing the movable anvil to be sequentially extended and retracted to cause flow within the flow tube (12) from the infeed valve assembly (26) to the outfeed valve assembly (38). With this apparatus the lumen of the flow tube (12) to the sides of the anvils is not completely reduced to zero volume during displacement compression whereby gas embolisms do not erupt or explode when discharged. Two principal embodiments are disclosed, one having infeed and outfeed check valves which oclude the flow tube, and the other having check valves.

The invention relates to a turtle type pump dredge. The turtle type pump dredge is characterized in that the middle part of the dredge is provided with a displacement type slurry pump, a material distributing machine is fixed at the front part of the dredge, and the material distributing machine comprises a bracket, a supporting arm and a dredge pipe; a bench rack which can rotate for 360 degrees is arranged on the rack, the bench rack is connected with a folding supporting arm, the dredge pipe is fixed on the supporting arm and the lower end of the dredge pipe is connected with the outlet of the displacement type slurry pump. The turtle type pump dredge has the advantages: firstly, the slurry transmitted has high concentration with the solid-to-liquid ratio of 80 percent, the water precipitation time is decreased, dredge field is not needed and the thick slurry can be directly loaded into tank vessels and transmitted, thus avoiding the secondary pollution; secondly, the transmission distance is long and can usually come up to 1,000-2,000m; and thirdly, the turtle type pump dredge can run in marsh, shoals and inland rivers and lakes in cities to dispose the domestic garbage and industrial wastes in cities.

A hydraulic control device of construction machine is provided with a control valve lying between a hydraulic pump and a hydraulic actuator for opening and closing a meter-in control flow path, and a flow rate control valve lying between a pump discharge line on the upstream side of the above control valve and a tank. The above flow rate control valve receives a pump pressure and a load sensing pressure corresponding to a pressure on the downstream side of the meter-in control flow path as a pilot pressure, and is activated for opening and closing so as to maintain a constant differential pressure therebetween. The above flow rate control valve is maintained in a closed state by a pilot pressure switching valve when the load sensing pressure is low. The above control valve opens a bypass line when the meter-in control flow path is closed.

The present invention provides a blood parameter sensing system that may include a sensor, a blood access system, a flow controller and a monitor system. The blood access system may include a blood draw member having an internal configuration adapted to avoid clotting without the use of anticoagulants and under a range of flow profiles, including small volume blood draws. The flow controller may be configured to adapt to a range of access devices by using feedback from the sensor and monitor to customize flow profiles. The monitor system is configured to reduce parameter measurement error by modeling sensitivity change during system startup or reconnect.

The invention belongs to the technical field of ballastless track construction and especially relates to a thixotropic agent for concrete of a bed-plate at the curve superelevation section of a ballastless track. In allusion to the problem that drainage slope and curve superelevation are not easy to control during pouring of concrete of a bed-plate at the curve superelevation section, a thixotropic agent for improving shape retaining ability of fresh concrete is invented. The thixotropic agent comprises the following ingredients (by weight): 0.5-4 parts of attapulgite, 0.5-5 parts of meerschaum, 0.02-0.38 part of fumed silica, 2-30 parts of silica fume, 0.06-0.5 part of triterpenoid saponin, 0.03-0.5 part of cellulose ether and 0-2.5 parts of fiber. By the use of the thixotropic agent, static morphological stability of fresh concrete can be greatly promoted, and slope fixing forming can be realized after pouring. Meanwhile, dynamic deformation energy is not increased, and concrete has good rheological performance during constructions of pumping, pouring, vibrating and the like and is convenient for construction. The product of the invention is of great significance for ensuring construction quality control of drainage slope and curve superelevation of the ballastless track bed-plate.

A dehumidifier has a water receiving tray receiving condensed water of the dehumidifier. The water receiving tray comprises a water tank outlet, a main water outlet arranged outside the casing of the dehumidifier as a whole, the main water outlet being arranged opposite the water tank outlet; a pump used for draining is provided on the bottom of the outside of the water receiving tray, the pump being directly connected with the water receiving tray, eliminating the need of providing a pipe to connect with the dehumidifier pump, therefore reducing the risk of leaking. By connecting the pump with the water receiving tray directly, the pressure loss due to the connection of pipe is eliminated; the drainage capacity of the pump is utilized fully. Without installing or detaching additional pipes during installment or maintenance, operation is easier.

To improve the configuration of electrodes disposed in the fluid channel of EHD pumps, and to reduce of the fluid channel of EHD pumps, as well as to reduce the cost of producing EHD pumps, and to increase the pumping pressure of EHD pumps. A hollow conical metal electrode open at the top end and the bottom end is used facing a rod-shaped metal electrode, and an electrically insulated fluid outflow channel is formed facing the hollow conical metal electrode, with the hollow conical metal electrode and rod-shaped metal electrode sharing a central axis, so that the two electrodes are disposed coaxially, and the rod-shaped metal electrode is disposed from the inner portion of the hollow conical metal electrode to the inner portion of the fluid outflow channel, and a portion of the rod-shaped metal electrode, positioned at the interface of at least the inner portion of the hollow conical metal electrode and the fluid outflow channel, serves as an exposed metal part, with this exposed metal part being caused to face the inner surface of the hollow conical metal electrode, and when an electric field is applied across the hollow conical metal electrode and the rod-shaped metal electrode, there is introduced a fluid wherein are formed dissociated ions, and high voltage direct current is applied across the hollow conical metal electrode and the rod-shaped metal electrode.

A pumping mechanism and the distributing valve thereof and a concrete pumping machine are disclosed. The distributing valve includes a valve casing (100) and a valve core (200) located in the pumping chamber of the valve casing. The valve core is rotatably connected to the valve casing, thus forming a main rotating axis (O). The valve casing has a discharge hole (103) throughout the casing wall, a first suction hole (101) and a second suction hole (102). The valve core has a distributing port (202) and a feed port (201) communicated with a material container. A pumping channel is formed between the peripheral face of the valve core and the inner wall face of the pumping chamber. The peripheral face of the valve core is provided with two cutting plates (210) protruding from two sides of the distributing port respectively. The outer side faces of the two cutting plates are rotatably sealedly matched with the sealing face of the valve casing. In a first state, the distributing port is communicated with the first suction hole through the space between the two cutting plates. In a second state, the distributing port is communicated with the second suction hole through the space between the two cutting plates. The distributing valve has a smaller matching area for cutting so as to ensure better sealing performance whilst have higher driving performance.

The disclosure teaches a method of sealing fractures in a wellbore wherein the steps comprise pumping a first sealing fluid into a wellbore under pressure, monitoring the hydraulic pressure of the sealing fluid in the wellbore for an indicator of seal initialization, stopping the pumping of fluid into the wellbore, monitoring the hydraulic pressure of the sealing fluid in the wellbore, and pumping a second sealing fluid into the wellbore. The disclosure also includes the method wherein the concentration of sealing materials in the first fluid is greater than the concentration of sealing materials in the second fluid and the method wherein the first sealing fluid contains a higher concentration of larger diameter sealing materials than the second sealing fluid. The disclosure also includes a method wherein the pumping rate change between the first pumping of sealing fluid and the pumping of the second sealing fluid. The first and second sealing fluids can be the same. The sealing materials of a sealing fluid are selected such that some of the sealing materials are larger than an estimated original fracture size.

A brake device that can be cooled effectively while reducing a friction loss of a rotary member is provided. In the brake device, a second friction face formed on a brake stator is brought into contact to a first friction face formed on a brake rotor to stop rotation of a rotary shaft, and coolant is held in a casing. The brake device comprises a first cooling groove formed on the brake rotor to allow the coolant to flow over the first friction face, and a second cooling groove formed on the brake stator to allow the coolant to flow over the second friction face.

Provided is an automatic film washout device includes a housing defining a rinsing chamber and a drain in fluid communication with the rinsing chamber. A drum is rotatably coupled to the housing and is configured to be engageable with the photosensitive material for washout thereof. A booster pump is operatively coupled to the housing and includes a pump inlet and a pump outlet, the pump inlet being fluidly connectable to the pressurized fluid source to receive fluid therefrom at an inlet pressure, the pump being configured to elevate the pressure of the fluid exiting the pump via the pump outlet. A plurality of nozzles are coupled to the housing and in fluid communication with the pump to receive fluid therefrom. The plurality of nozzles are configured to direct fluid into the rinsing chamber for washout of the photosensitive material.

The invention provides a liquid rocket thrust control system and a liquid rocket. The liquid rocket thrust control system comprises a pumping device, an inlet of the pumping device is communicated with a fuel supply system or an oxidant supply system, and an outlet of the pumping device is provided with a plurality of adjusting branches in parallel; the adjusting branches are provided with metering valves, constant-pressure-difference throttling valves connected to the two ends of the metering valves in series, and on-off valves; the on-off valves are used for controlling the on-off of the adjusting branches; the plurality of adjusting branches act on at least one power device. According to the liquid rocket thrust control system, the thrust-weight ratio of a rocket can be effectively increased, and meanwhile, accurate adjustment of the rocket thrust can be achieved.

The invention relates to a passive turbine emulsifier. The passive turbine emulsifier comprises a shell, an emulsifying shaft, a disk group, shearing blades and a stator grid, wherein a first cavity,a second cavity and a third cavity are arranged in the shell; the emulsifying shaft is fixedly arranged in the second cavity through a left bearing and a right bearing; the disk group and a fixed sheet are arranged at the left end of the emulsifying shaft; the shearing blades and the stator grid are arranged at the right end of the emulsifying shaft; the center of an end cover is provided with a first discharge hole; the right side of the first discharge hole is connected with a discharge pipe. By adopting the passive turbine emulsifier, additional power driving is not needed, thereby loweringthe production cost. No additional protection sensing device is needed, and heat generated during mechanical rotation can be brought away.

A hydraulic working machine is provided that uses a variable displacement pump and open center type flow rate control valve for a controlling a hydraulic actuator, and has a negative control throttle disposed in a center bypass oil passage to generate a negative control pressure. A hydraulic pump control system performs virtual bleed-off control for reducing the bleed-off flow rate of the center bypass oil passage, and can operate the hydraulic actuator with the same performance as an open center control. The control system includes a bypass cut valve disposed upstream from the negative control throttle to reduce flow through the center bypass oil passages, and a negative control pressure output valve that outputs a virtual negative control pressure. The control system is configured to reduce the bleed-off flow rate by operating the bypass cut valve when virtual bleed-off control is performed, and to reduce the pump flow rate by the bleed-off reduction flow rate.

A direct water purifier includes a first filter for filtering water introduced through a first flow path; a second filter for receiving the water supplied from the first filter through a second flow path and filtering the same; a first valve disposed in the second flow path to control water flow; a pump disposed in the second flow path to supply water having a predetermined hydraulic pressure or higher to the second filter; a third filter for receiving the water supplied from the second filter through a third flow path and filtering the same; a heating part for receiving the water supplied from the third filter and heating the same to a predetermined temperature; and a flushing valve disposed in a flushing flow path through which concentrated water is discharged from the second filter, wherein the flushing valve is opened during operation of the heating part.