33results about How to "Large liquid flow" patented technology

A novel propellant management device used in a propellant storage box comprises a central supporting column, flow guide blades, supporting column blades, large blades, liquid storage blades, an upper pressing plate, an upper mesh, an upper supporting plate, small cylinders, a framework, a lower pressing plate, a lower mesh and a lower supporting plate, wherein the flow guide blades, the supporting column blades and the large blades are all fixedly mounted on the central supporting column in the radial direction to form an integral structure, the integral structure is fixedly mounted on the upper pressing plate through the central supporting column, the supporting column blades and the large blades are mounted in the same plane, and a mounting plane of each flow guide blade and a mounting plane of each large blade form a certain included angle; the liquid storage blades are fixedly mounted on the upper pressing plate in the radial direction; the upper pressing plate, the upper mesh, the upper supporting plate, the small cylinders, the middle framework, the lower pressing plate, the lower mesh and the lower supporting plate are sequentially fixedly mounted from top to bottom to form the integral structure, namely, a liquid accumulation assembly. The novel propellant management device has the inhibition function on shaking of liquid, performs comprehensive management on propellants and is simple in structure, high in strength and reliability and large in liquid storage capacity, the on-orbit work application range is large, the on-orbit liquid discharge speed is high, and meanwhile, repeated large-flow filling on the ground can be realized.

The invention discloses a processing method for controlling abnormal pressure rise in the shale fracturing process. The processing method comprises the following steps that in the middle and later periods of fracturing, a critical sand ratio method is adopted for construction when abnormal pressure rise occurs and comprises the specific steps that 1, the critical sand ratio is determined, wherein a critical sand ratio range is determined as the sand ratio subtracted by 2%-5% at the moment when pressure rises at the slope greater than 1 / 2 in the sand adding process, sand adding is stopped immediately, fracturing fluid injection continues, the injection amount is 1-1.5 times of shaft volume, sand adding is stopped but fluid injection is not stopped; 2, abnormal pressure rise is processed, wherein the point not exceeding the critical sand ratio serves as a starting point to perform pressurized fracturing again after the injection of a fracturing fluid 1-1.5 times of shaft volume is completed, and a sand ratio value in fracturing sand is gradually increased till designed sand adding amount is completed. By adopting the critical sand ratio method, a sandy dyke formation speed can be reduced, the rapid rise situation of construction pressure is effectively controlled, and the method has the advantages that operation is simple and convenient, an existing fracturing process is not changed, the fracturing construction quality can be improved, and a reconstruction effect is ensured.

The invention relates to a dishwasher spraying mechanism in the technical field of a dishwasher, comprising a spraying arm connected with a rotating rod and provided with a water-passing mold cavity;a high-pressure spray nozzle communicating with a water-passing mold cavity; the high-pressure spray head is rotatably arranged with respect to the spray arm; the rotating lever drives the spray arm to rotate. The invention can carry out spray operation with less high-pressure spray nozzles, and has the advantages of strong cleaning ability and high cleaning efficiency.

The invention discloses a valve element of a safety valve. The valve element comprises a liquid incoming section and a guide section which are axially arranged sequentially, a first liquid passing hole, a second liquid passing hole, a third liquid passing hole and a fourth liquid passing hole which are axially arranged sequentially are formed in the liquid incoming section, the first liquid passing hole and the second liquid passing hole are used for guiding liquid entering the valve element to a second liquid discharging hole of the safety valve, and the third liquid passing hole and the fourth liquid passing hole are in staggered arrangement. The first liquid passing hole, the second liquid passing hole, the third liquid passing hole and the fourth liquid passing hole are in staggered arrangement, so that liquid passing flow is increased, metal performance of the valve element is improved, rigidity of the valve element is improved, so that the valve element is less prone to breaking; the valve element is large in liquid passing flow, so that increasing of liquid discharging flow of the safety valve is facilitated, and unloading capacity of the safety valve is improved.

A novel propellant management device used in a propellant storage box comprises a central supporting column, flow guide blades, supporting column blades, large blades, liquid storage blades, an upper pressing plate, an upper mesh, an upper supporting plate, small cylinders, a framework, a lower pressing plate, a lower mesh and a lower supporting plate, wherein the flow guide blades, the supporting column blades and the large blades are all fixedly mounted on the central supporting column in the radial direction to form an integral structure, the integral structure is fixedly mounted on the upper pressing plate through the central supporting column, the supporting column blades and the large blades are mounted in the same plane, and a mounting plane of each flow guide blade and a mounting plane of each large blade form a certain included angle; the liquid storage blades are fixedly mounted on the upper pressing plate in the radial direction; the upper pressing plate, the upper mesh, the upper supporting plate, the small cylinders, the middle framework, the lower pressing plate, the lower mesh and the lower supporting plate are sequentially fixedly mounted from top to bottom to form the integral structure, namely, a liquid accumulation assembly. The novel propellant management device has the inhibition function on shaking of liquid, performs comprehensive management on propellants and is simple in structure, high in strength and reliability and large in liquid storage capacity, the on-orbit work application range is large, the on-orbit liquid discharge speed is high, and meanwhile, repeated large-flow filling on the ground can be realized.

The invention discloses a valve element component of a safety valve. The valve element component comprises a valve body, a valve element in movable arrangement, a valve sleeve sleeving the valve element and positioned inside the valve body and a compression screw positioned inside the valve body and used for limiting the valve element and the valve sleeve, the valve element comprises a liquid incoming section and a guide section which are axially arranged sequentially, outer diameter of the liquid incoming section is greater than that of the guide section, the valve sleeve sleeves the liquid incoming section, the compression screw sleeves the guide section, and a first liquid passing hole, a second liquid passing hole, a third liquid passing hole and a fourth liquid passing hole which are axially arranged sequentially are formed in the liquid incoming section. The valve element is axially limited through the compression screw, and a limiting structure on the valve element is positioned inside the compression screw and matched with the same, so that requirements on wall thickness of the liquid incoming section of the valve element are lowered; an inner cavity of the liquid incoming section of the valve element can be arranged to be large to enable liquid passing flow of the valve element component to be large, so that increasing of liquid discharging flow of the safety valve is facilitated.

The invention discloses a method for purifying ship ballast wastewater, comprising the following steps: S1. forming an electric field in a space between a high-voltage electrode and a ground electrode; S2. high-pressure gas in a high-pressure gas cylinder entering the electric field space through a gas flow control valve, A plasma jet is formed and sprayed; S3. The liquid to be treated in the liquid reservoir is sprayed in the form of a spray under the action of a liquid processor after passing through a liquid flow control valve, a filter and a flow meter, and all the spray fields pass through The non-equilibrium plasma jet area; S4. Under the action of the non-equilibrium plasma jet, the target purifying substances contained in the droplet particles in the atomization field are killed; S5. The detection port control valve is opened, and the detection port return pump will The purified liquid is drawn out and sent to the detector; S6. The detector analyzes the purified liquid. A detection mechanism is added to further improve the purification effect.

The invention relates to a continuous membrane treatment method for alkali squeeze liquid in the viscose fiber production process, including the steps of material preparation, feeding, and system operation; wherein, in the process of system operation, a cleaning step is also included: the first stage The nanofiltration membrane module is switched out from the nanofiltration membrane system for cleaning, other nanofiltration membrane modules are operating normally, and the alkali squeeze liquid or the concentrated liquid produced by the upper nanofiltration membrane module skips the cleaning nanofiltration membrane module. After cleaning, the nanofiltration membrane module is connected back to the nanofiltration membrane system in series; and so on, the nanofiltration membrane modules at all levels are cleaned separately. The invention is a set of continuous membrane treatment process with automatic operation and cleaning, which changes the batch intermittent operation mode adopted by the traditional technology, can effectively improve the utilization rate of the nanofiltration membrane, reduce the cleaning times of the nanofiltration membrane, and prolong the service life of the nanofiltration membrane .

The invention discloses a hard mouth tube of an infusion bag, which comprises a body, and a through hole in the vertical direction is arranged on the body, one end of the body is a connection part, and the other end is an outlet part, and there is a section in the middle of the body for The transition part connecting the outlet part and the connection part, the said through hole is circular in the outlet part and oblate rhombus in the connection part, and the wall thickness of the transition part transitions from thick to thin from the outlet part to the connection part. The flat diamond-shaped design makes the thickness of the side wall of the connection part of the hard mouth tube of the infusion bag uniform, so that heat sealing will not be uneven, the heat sealing quality is good, and materials are saved. At the same time, the design of the transition part further saves materials.

The invention provides a hydrodynamic radial bearing provided with an axial-flow pressurizing structure and a centrifugal pump. The hydrodynamic radial bearing comprises a shaft sleeve and a bearing body matched with the inside of the shaft sleeve; the bearing body comprises two opposite end surfaces and a side surface located between the two opposite end surfaces; and the axial-flow pressurizingstructure is arranged on the side surface of the bearing body, is close to at least one of the two opposite end surfaces and is far away from the central area of the side surface. Compared with the prior art, the hydrodynamic radial bearing has the advantages that a pressurizing device is added to the front part of the hydrodynamic radial bearing, the cavitation phenomenon which is caused easily in a general hydrodynamic bearing is restrained, and the reliability of the bearing is improved remarkably.

A tank car charging and discharging system belongs to railway tank car pneumatic operations and remotely monitored top loading and bottom unloading. The tank car charging and discharging system comprises a charging and discharging device disposed at the bottom of a tank car and an overcharge automatic protection device (9) disposed on the top of the tank car. During medium loading on the tank car, when the medium reaches a preset height, the overcharge automatic protection device (9) provides a signal for ground equipment, and ground operation personnel decide to turn on or turn off the charging and discharging device according to the signal. The tank car charging and discharging system is high in safety, strong in reliability, and good in accuracy.

The invention relates to a directional control valve, in particular to a valve body blank, which comprises a main flow passage, control flow passages and oil inlet flow passages, wherein the main flow passage is arranged in the middle of a valve body, the control flow passages are arranged above the main flow passage and the oil inlet flow passages are arranged below the main flow passage. Four edges at the upper end of the valve body are slope surfaces. Two rectangular bulges are respectively arranged adjacent to the middle positions on the slope surfaces on the two sides of two short edges at the upper end. A platform is arranged on the edge of each slope surface. L-shaped grooves are arranged on the two sides of the long edges at the upper end, i.e. at four corners. Semicircular grooves are arranged in the middle of the long edges. An upper end surface is provided with two control oil holes. A left end surface and a right end surface are respectively provided with two flow passage holes, i.e. an auxiliary oil hole and a main flow passage hole, wherein auxiliary oil holes are respectively formed in the rectangular bulges of the slope surfaces of the upper end, and main flow passage holes are respectively formed in the middle and the edges of the main flow passage holes are bell-mouth-shaped. A lower end surface is provided with two auxiliary oil holes and four oil inlets, wherein the two auxiliary oil holes and the four oil inlets are transversely arranged in two rows at positions close to two sides. The drift diameter of the oil inlet flow passages is phi 28mm. The valve body blank has the advantages of simple structure, material saving, large flow and enough hydraulic force.