18results about How to "Improve pumping capacity" patented technology

The invention relates to the technical field of dredged soil curing agents, in particular to a dredged soil pneumatic mixed flow curing agent and a preparation method thereof. The dredged soil pneumatic mixed flow curing agent is prepared from the following raw materials in parts by weight: 20 to 50 parts of cement, 10 to 40 parts of fly ash, 10 to 40 parts of mineral powder, 20 to 50 parts of quick lime, 0.01 to 0.1 part of retarder, 0.01 to 0.05 part of flocculant, 0.005 to 0.01 part of silane coupling agent and 0.1 to 0.3 part of hydrophobic adsorption type admixture. The hydrophobic adsorption type admixture, the silane coupling agent and the flocculating agent are doped into the curing agent raw materials at the same time and have a synergistic enhancement effect, so that the cohesiveness and the pumpability of curing agent slurry can be remarkably improved, the adaptability of the curing agent slurry and dredged soil in a pneumatic mixed flow process can be enhanced, the sensitivity to the water content of the dredged soil is reduced, and the curing agent has the advantages of being simple in preparation process and low in cost. The solidified soil is relatively stable in later-stage reinforcement, the solidifying agent is used in dredged soil pneumatic mixed-flow solidification production, the pumping constructability, the dispersion resistance in water and the hardening performance of the solidified soil can be remarkably improved, and the solidifying agent is suitable for filling projects such as sea reclamation and backfilling.

The invention provides a flexible heat pipe based on a bionic directional liquid conveying structure and a manufacturing process, relates to the field of flexible heat pipes, and aims to solve the problem that the heat dissipation efficiency of a current flexible heat pipe is difficult to meet the requirement. A liquid suction channel and a protruding column are formed on a flexible base body of the flexible heat pipe, and the protruding column is of a bionic structure; the capillary pressure of the working medium pumped by the flexible substrate serving as the wick is improved, the gas-liquid circulation in the flexible heat pipe is effectively improved, and the heat dissipation effect of a local area is enhanced, so that the heat dissipation capability and the environmental stability of the flexible heat pipe are improved, and the service life of electronic equipment is prolonged.

The invention relates to the technical field of hole filling materials around a shield, and discloses a hole filling material around the shield and a preparation method and application of the hole filling material around the shield. The mass ratio of the sodium bentonite to the calcined kaolin to the organosilicon waterproofing agent to the fly ash to the building retarder to the thickening agent in the component A is (25%-28%): (25%-28%): (2%-4%): (2%-3%): (2%-4%): (0.04%-0.08%), and the balance is water; and the component B comprises a sodium silicate aqueous solution. The material disclosed by the invention can be applied to a soft soil area, and the shield periphery pore filling material has good pumpability, so that the shield periphery pores can be quickly filled; and in addition, the reaction is rapid, the certain viscosity is achieved, and the final supporting performance reduction caused by solid-liquid separation of the shield periphery hole filling material in the reaction process can be avoided.

The invention discloses a TC cavity automatic cleaning system, and relates to the technical field of semiconductor manufacturing, the TC cavity automatic cleaning system comprises a cavity, a vacuum hand disc is installed in the cavity, the automatic cleaning system further comprises a second air inlet branch pipe, the two ends of the bottom of the second air inlet branch pipe penetrate through the top of the cavity and extend into the cavity, and the second air inlet branch pipe is arranged in the cavity. The two ends of the bottom of the second air inlet branch pipe fixedly communicate with the same annular air inlet pipe, and the bottom of the annular air inlet pipe fixedly communicates with a plurality of first air spraying heads. According to the invention, through a simple structure, automatic cleaning in the cavity is realized, manual cavity opening is not needed, the downtime is obviously reduced, contamination particles of a vacuum hand disc are prevented from being adhered to a wafer to cause chip scrapping, the production continuity and efficiency are improved, the production cost is reduced, the production efficiency is improved, the production cost is reduced, and the production cost is reduced. The manual intervention requirement is reduced, precise cleaning is ensured through the adjusting assembly, pollutants are rapidly removed through the exhaust assembly, and cleaning parameters can be optimized through the valve.

A breast pump assembly is disclosed. The breast pump assembly according to an aspect of the present disclosure may include: a breast pump including a contact housing with a backside recessed to wrap a breast and a storage housing coupled to the contact housing to define a breast milk storage space on a frontside of the contact housing, the breast pump being provided with a coupling cavity penetrating an upper portion of the storage housing; a stopper detachably coupled to the coupling cavity and provided with a first air pipe connector; an air pipe coupled to the first air pipe connector; and a pump cradle provided with a second air pipe connector to which the air pipe is coupled. The pump cradle includes: a first case provided with the second air pipe connector, an insertion hole and an air passage connector; a first milking pump installed in the first case; a duct connecting the first milking pump and the air passage connector to the second air pipe connector; and a pump module including a second case detachably coupled to the insertion hole and a second milking pump installed in the second case.

The present invention provides a sealing end face structure of a rotating mechanical device, comprising a stationary ring and a moving ring that can rotate relative to the stationary ring, wherein the low-pressure side of the stationary ring or the moving ring is the downstream side, and the high-pressure side of the stationary ring or the moving ring is the upstream side; the downstream side of the relative surface of the stationary ring or the moving ring has a plurality of reverse groove groups, the plurality of reverse groove groups are spaced apart in the radial direction, and each of the reverse groove groups includes a plurality of reverse spiral grooves distributed in the circumferential direction. After adopting a plurality of reverse groove groups, the pumping capacity of the fluid on the downstream side can be enhanced, and at the same time, the reverse spiral grooves in the reverse groove group can store fluid to reduce the friction and wear of the sealing end face, increase the service life of the seal, and ensure the effect of the mechanical seal.

The filling device comprises a filling chamber, a raw material chamber and a pumping chamber, a pump box and a sliding rail are fixedly installed in the pumping chamber, and a material pumping driving motor is fixedly installed on the outer wall face of one side of the pumping chamber. The driving end of the material pumping driving motor penetrates through the wall face of the pumping chamber and is connected with a wheel disc towards the interior of the pumping chamber, a connecting rod is connected between the wheel disc and the sliding rail, the connecting rod is connected with a baffle towards the interior of the pump box, and an electric heating sleeve is fixedly installed outside the pump box. A feeding pipe and a discharging pipe are connected to the bottom end of the pump box towards the interior of the raw material chamber and the interior of the filling chamber respectively, a first one-way ball valve is installed on the feeding pipe, and a second one-way ball valve is installed on the discharging pipe. The pipeline is provided with a heat preservation layer to guarantee the temperature of raw materials, and the pumping effect is improved through the arrangement of the double-one-way ball valve.

The present invention relates to the technical field of lubricating grease, and in particular to a shield tail lubricating grease for a shield machine and a preparation method thereof, which comprises the following components by weight: 25-55 parts of base oil, 10-25 parts of fiber material, 20-40 parts of filler, 10-30 parts of viscosity promoter and 15-25 parts of lubricant, wherein the lubricant is a modified nano-silicon dioxide-modified graphene composite material. The present invention adopts a shield tail lubricating grease for a shield machine with the above structure and a preparation method thereof, which solves the problems of low lubricity, poor adhesion and low pumping efficiency of the shield tail lubricating grease in the prior art.

A kind of vacuum powder sintering furnace special evacuation unit, including diffusion pump, the diffusion pump is connected with front valve and main valve, and the connecting pipeline between diffusion pump and front valve is also provided with maintenance pump with maintenance valve;The end of the front valve away from diffusion pump is provided with three-way pipe, and the opening of three-way pipe away from diffusion pump is connected with pre-evacuation valve and front stage pump respectively;The end of the pre-evacuation valve away from three-way pipe is connected to main valve, and micro-evacuation valve is also provided between three-way pipe and main valve, the pre-evacuation valve and micro-evacuation valve cannot be opened simultaneously;Roots pump is arranged between three-way pipe and front stage pump, and rough evacuation valve is arranged between roots pump and front stage pump.Different from conventional equipment, the device is through multiple pipelines and is respectively provided with micro-evacuation valve, pre-evacuation valve and main valve, then control above-mentioned valve is opened in different time period, to be able to carry out vacuumizing operation in different stages for different purposes respectively.

The utility model discloses a distillation system, including controller and the distillation reation kettle, first condenser, vacuum buffer tank, air pump, second condenser and gas collection tank that are connected in proper order in series, be equipped with first pressure sensor on the distillation reation kettle, and the connecting pipeline between distillation reation kettle and first condenser is equipped with first electric control valve, and the connecting pipeline between vacuum buffer tank and air pump is equipped with second electric control valve, and air pump includes first vacuum pump and second vacuum pump, and first vacuum pump is roots vacuum pump, and second vacuum pump is reciprocating vacuum pump, first pressure sensor, first electric control valve, second electric control valve, first vacuum pump and second vacuum pump all are electric connection with controller. The utility model embodiment can realize automation and optimize distillation condition.

The invention provides a particle discharging device and method for a Tokamak divertor area. The device comprises an adsorbent pump unit arranged in a divertor area and a gas channel structure communicated with the divertor area, and is used for capturing and discharging neutral particles generated by interaction of plasma and divertor components. The adsorbent pump unit is made of a non-evaporation type adsorbent material, has high adsorption capacity on hydrogen and isotopes thereof, can keep stable structure and working performance under the condition of high temperature, and is suitable for a high-heat-load and high-particle-flux operating environment in a divertor area. The in-situ air exhaust of the neutral particles is realized in the divertor area, so that the transport path of the particles is shortened, and the response speed and efficiency of particle discharge are improved. Meanwhile, the particle discharging device has large air extraction capacity and effective extraction speed, is suitable for tritium-related application scenes and operating environments with neutron irradiation, and has good engineering application prospects.

The invention relates to the field of pumping concrete, and particularly discloses a pump lubricating agent for pumping of a concrete ground pump and application of the pump lubricating agent. The pump lubricating agent for pumping of the concrete ground pump comprises the following components in parts by weight: 100 parts of solid powder particles, 1-10 parts of a powder particle suspension stabilizer and 30-150 parts of water, the solid powder particles comprise a mixture of two or more of fly ash, concrete mortar waste residues, machine-made sand, tailing sand and limestone powder, and the powder particle suspension stabilizer is a mixture of two or more of the fly ash, the concrete mortar waste residues, the machine-made sand, the tailing sand and the limestone powder. The powder particle suspension stabilizer comprises a mixture of two or more of a quaternary ammonium salt suspending agent, a polyacrylic acid suspending agent, an alkylphenol suspending agent, a polyhydric alcohol suspending agent, a sulfonic acid group suspending agent and a stearic acid suspending agent. The pump lubricating agent for pumping of the concrete ground pump can be used for lubricating a pumping pipeline of the ground pump, and the problems of pipe blockage and slurry leakage when an existing pump lubricating agent is used in the ground pump are solved.

The water pump comprises a pump shell and an impeller rotatably arranged in the pump shell, a water inlet is formed in the bottom of the pump shell, and an adjusting assembly capable of adjusting the size of the water inlet is arranged at the bottom of the pump shell. The adjusting assembly comprises a frame edge which expands along with increasing of water flow and contracts along with decreasing of the water flow, and the frame edge is arranged around the edge of the water inlet. The adjusting assembly capable of adjusting the size of the water inlet is arranged at the bottom of the pump shell, the adjusting assembly is mainly achieved through the frame edge which expands along with increasing of water flow and contracts along with decreasing of the water flow, when the rotating speed of the impeller is large, the frame edge expands along with increasing of the water flow, so that the water inlet area is increased, and when the rotating speed of the impeller is small, the frame edge contracts. The rims shrink along with the reduction of the water flow, so that the water inlet area is reduced, the water inlet area is matched with the water flow, the water inlet flow speed is controlled within a relatively stable range, and the water pumping performance is improved.

The invention relates to the technical field of mine green filling and waste gas storage, and provides a flue gas adsorption-storage method based on goaf pressure-bearing multi-source solid waste filling. Aiming at the problems of surface subsidence of the goaf after coal mining and pollution of flue gas of the pithead power plant to the atmospheric environment, solid wastes generated in the coal mining process are used for performing nearby backfilling on the goaf, and meanwhile, harmful flue gas of the pithead power plant is subjected to adsorption-storage; and the filling cost is reduced, and meanwhile, the quality of air around a mining area is improved. Moreover, a'whole-section high multi-separation-layer continuous grouting 'method is adopted, so that'one hole with multiple purposes' and timely grouting in the dynamic development process of the separation layers are realized, the failure rate of the drill hole is reduced, and the service life of the drill hole is prolonged. Furthermore, a sensor installed in a to-be-filled area is utilized, intelligent real-time monitoring of the goaf roof contact condition and the flue gas sealing condition in the filling process is achieved, and the working efficiency is greatly improved.

The present invention relates to the field of transportation technology, specifically to a scraper conveyor with a tail coal cleaning structure, including a frame and a coal cleaning component, a transport trough is fixedly provided on the top of the frame, a bearing plate is fixedly installed between the front wall and the rear wall of the transport trough, and a discharge port is penetrated and opened at the bottom of one end of the transport trough away from the coal cleaning component. The gravity of the coal acts on the material-moving component along the oblique downward component of the bearing plate, causing multiple material-moving blocks of the material-moving component to bend, and the bending of the multiple material-moving blocks causes multiple tension springs to be elastically deformed, and the front and rear two torsion blocks are twisted along the right-angled bent rod under the pulling force of the multiple material-moving blocks, so that the two torsion blocks and the multiple material-moving blocks are similar to circular arcs, so that the coal is pulled toward the middle, so as to reduce the amount of coal leaking to the tail of the transport trough through the gap between the torsion blocks and the inner wall of the transport trough during the transmission process, thereby improving the efficiency of coal transportation.

The present invention discloses a centrifugal pump degassing device and a pulp conveying system. The centrifugal pump degassing device includes a pulp inlet pipeline connecting a pulp pool and a centrifugal pump, wherein the pulp inlet pipeline is provided with at least one variable diameter section, and the inner diameter of the variable diameter section is smaller than the inner diameter of the pulp inlet pipeline located upstream of the variable diameter section; at least one of the variable diameter sections is provided with an exhaust port, and an exhaust pipe is installed at the exhaust port. By comparison, after exhausting the gas through the centrifugal pump degassing device of the present invention, the cyclone at the center of the centrifugal pump impeller disappears, and the pumping capacity of the centrifugal pump is increased by 30%; at the same time, under the same flow rate and head, the output power of the centrifugal pump is significantly reduced, and the power saving reaches 30%.

The utility model provides a double-runner impeller which comprises an upper cover (1) and a lower cover (2), a first shaft (4) is arranged at the top of the upper cover (1) in an extending mode, a second shaft (5) is arranged at the bottom of the lower cover (2) in an extending mode, the double-runner impeller is characterized in that the upper cover (1) and the lower cover (2) are fixedly connected through a shell (3), and double runners (S) are formed in an inner cavity defined by the upper cover (1), the shell (3) and the lower cover (2). A flow inlet (41) communicated with the double flow channels is formed in the first shaft (4), and flow outlets (31) communicated with the double flow channels are formed in the two sides of the shell respectively. An impeller structure is omitted, the precise actuarial and analogue simulation process is omitted, the possibility of abrasion or breakage of blades after long-time use is reduced, pumping of internal fluid media is achieved only through an inner cavity double-flow-channel structure, the pumping effect is guaranteed, and the service life is prolonged.

The invention relates to the technical field of concrete, and discloses a low-standard machine-made sand concrete for super high-rise pumping, which comprises the following components: 240-270 parts by weight of cement, 60-80 parts by weight of mineral powder, 90-120 parts by weight of fly ash, 800-860 parts by weight of machine-made sand, 900-950 parts by weight of stone, 160-170 parts by weight of clear water, 4-6 parts by weight of admixture and 4-6 parts by weight of cellulose ether. According to the preparation method of the low-standard machine-made sand concrete for super high-rise pumping, by optimizing the mass ratio of the mineral powder to the fly ash to the machine-made sand to the stone to the clear water to the additive, it is ensured that the concrete has excellent fluidity and stability, so that the concrete can smoothly pass through pumping equipment and has excellent performance in high-altitude operation; by means of the accurate proportioning and mixing process, the concrete obtains good workability, high pumpability can be maintained even under the pumping condition of a super high-rise building, the pump damage phenomenon is reduced, the common problems of pipe burst and pump blockage in the construction process are effectively avoided, and therefore the construction efficiency and safety are improved.