52results about How to "Smooth pumping" patented technology

The invention relates to a test device for simulating permafrost region well heat insulation or heating. The test device is characterized in that a test tank is a circular interlayer barrel body consisting of an outer ring, an inner ring, a top plate and a bottom plate, a soil body is filled in an interlayer, a refrigerating liquid circulation passage is arranged inside the top plate and the bottom plate, is connected with a refrigerating temperature control device and is in contact with the soil body, water is filled in a water tank, the water tank is arranged in the test tank, a heat insulation barrel is placed between the water tank and the test tank, heat insulation covers are placed on and under the water tank, a water replenishing device is connected with a water tank bottom plate through a water replenishing pipe, a water pressure gauge is arranged on the water replenishing pipe, a water pumping device is connected with a water tank top cover through a water pumping pipe, the water pumping pipe is inserted into water of the water tank, a flow meter is arranged on the water pumping pipe, a heating temperature control device is connected with a heating pipe through a conducing wire, the heating pipe is inserted into the water of the water tank, and temperature sensors are arranged in the solid body and the water of the water tank and are respectively connected with a digital collecting instrument. The test device has the advantages that the permafrost region well is simulated, the reasonable well diameter, the water pumping speed, the heat insulation thickness and the power of a heating device are obtained, and the goals of energy saving and environment protection are reached.

The invention relates to a special concrete pumping agent for ultra-high buildings. The special concrete pumping agent is prepared from raw materials of polyether monomers containing double bonds, unsaturated carboxylic acid and derivative monomers thereof, unsaturated carboxylic acid ester and derivative monomers thereof, a bleeding-improved assistant, a chain transfer agent and an initiator, wherein water reducing agents are composed of polyether monomers containing double bonds, unsaturated carboxylic acid and derivative monomers thereof, unsaturated carboxylic acid ester and derivative monomers thereof and bleeding improved assistants; the adding amount of the initiators and the adding amount of the chain transfer agents are 0.2-0.5% and 0.05-0.2% of the total weight of water reducing agents respectively. The special concrete pumping agent does not need to be compounded with other additives, is simple in ingredients, has effects of water reducing and slump conserving on concrete, reduces initial viscosity of concrete, avoids the bleeding phenomenon in ultra-high concrete pumping, and is suitable for smooth pumping of concrete to ultra-high buildings over 100 meters.

The invention discloses a concrete pump moisturizing agent and a using method thereof. The concrete pump moisturizing agent is prepared from the following raw materials in percentages by weight: 25-50% of polyacrylamide and 50-75% of sodium sulfate. Components of raw materials of the pump moisturizing agent are easily obtained, a production process is simple and convenient, the production cost islow, water solubility is good, construction is facilitated, adaptability to concrete and mortar is good, adverse effects on concrete do not exist, construction operability of concrete pumping can be greatly improved, and meanwhile, the concrete pump moisturizing agent is energy-saving and environmentally friendly, and has good industrial prospect.

The invention relates to a foundation pit local dewatering construction method, relates to the technical field of foundation pit dewatering, and aims at solving the problems that an existing dewatering well easily receives impact of underground water, and easily generates the hole collapse condition, or even well wall slurry collapsing can occur, and a water discharging pump is blocked. The methodcomprises the following steps of Step 1, determining the dimension, quantity and positions of dewatering wells; Step 2, manufacturing dewatering pipes; Step 3, digging water collecting pits; Step 4,fixing the dewatering pipes; Step 5, filling and installing filtering layers; and Step 6, constructing waterproof layers. The foundation pit local dewatering construction method has the beneficial effect that a hole collapsing phenomenon of the dewatering wells can be reduced.

The invention provides an automatic feeding system. The automatic feeding system comprises a storage device used for supplying building materials with fluidity, a pumping device, a feeding pipeline and a pumping control device, wherein the pumping device is connected with the storage device, provides power for conveying the flowing building materials, and can pump the flowing building materials from the interior of the storage device; the feeding pipeline is connected with a discharging opening of the pumping device, and the flowing building materials are conveyed to an external executing mechanism through the feeding pipeline; and the pumping control device controls starting and stopping of feeding of the pumping device, measures the flow of the feeding pipeline or the feeding pressure and weight of the executing mechanism, judges whether current feeding meets the feeding requirement or not according to a measurement result and the working efficiency of the executing mechanism, adjusts the pumping efficiency of the pumping device according to the judgment result, and achieves accurate control over feeding. According to the automatic feeding system, the feeding efficiency can be greatly improved, and labor force consumed by manual feeding is avoided; and meanwhile, feeding is accurately controlled, material waste is reduced, and the construction cost is reduced.

The invention relates to the field of bridge construction, and particularly relates to a side arch rib construction method and a side arch rib. The side arch rib construction method comprises the following steps that a foundation of the side arch rib is pretreated, and prepressing inspection is conducted on the foundation; a mounting bracket of the side arch rib is erected on the foundation, and apreset arc-shaped surface is formed at the top end of the mounting bracket during erection; a side arch rib formwork is mounted on the mounting bracket, and concrete is poured in a layered mode to form the arch rib; and a formwork of a mounting end cross beam at the upper end of the arch rib is extended, and concrete is poured in a layered mode to connect the arch ribs on the two sides of a bridge in the transverse direction. According to the side arch rib construction method and the side arch rib, the preset arc-shaped surface is formed at the top end of the mounting bracket, so that the erected mounting bracket can be matched with the bending shape of the arch rib, thus effective supporting of bracket stand columns to the side arch rib is ensured, and the compactness and strength of theconcrete are ensured through the layered pouring mode.

The invention relates to a cement filling mechanism for engineering machinery. The cement filling mechanism comprises feeding guide tracks, a feeding assembly, a filling assembly, a weighing track, anadvancing track, a removing track and a removing mechanism, wherein tank bodies are placed between the feeding guide tracks, the side parts of the feeding guide tracks are provided with opening portscorrespondingly; the feeding assembly comprises an active feeding roller and a driven feeding part, wherein the driving feeding roller is arranged in one opening port, and the driven feeding part isarranged in another opening port; the position of the filling head of the filling assembly and the filling head are coaxially provided with a dustproof funnel, the dustproof funnel is suitable for being arranged at the inlet of each tank body in a covering mode, and an ash suction pipe communicating with the inner cavity of the dustproof funnel is arranged at the end part of the dustproof funnel;the weighing track is located at the outlet ends of the feeding guide tracks, and the weighing track is suitable for being connected with the tank bodies positioned on the feeding guide tracks; and the advancing track is located at an outlet of the weighing track, the advancing track is suitable for being connected with the tank bodies positioned on the weighing track, the removing track is located on one side of the advancing track, and the removing mechanism is suitable for removing the tank bodies located on the advancing track to the removing track. According to the cement filling mechanism, rising dust can be conveniently reduced, and the tank bodies with relatively low quality can be removed conveniently.

The invention provides an automatic water level control water pump. The automatic water level control water pump comprises a pump shell, an impeller, a water level detecting assembly, a control board and a motor. The motor and the impeller are arranged in a motor chamber and an impeller chamber of the pump shell respectively. The impeller is arranged on a rotating shaft of the motor, wherein the rotating shaft extends to the impeller chamber. The water level detecting assembly comprises a fixing shell, a detecting board and three water induction heads. The three water induction heads are located at different heights and connected to the detecting board. The fixing shell is fixed to the pump shell, the detecting board is installed in the fixing shell in a sealing mode, and at least one part of each water induction head is exposed out of the fixing shell. The control board is connected to the detecting board and drives the motor to run according to water induction head detecting signals from the detecting board. The motor is controlled to run according to the water level detected by the three water induction heads and the detecting signals, and the water level in an aquarium or an electric appliance device can be automatically controlled.

The invention discloses a pulverizing mechanism of a coal mine slurry pump, which comprises multi-stage mixing knives arranged at the water inlet and freely rotatable, the mixing knives at each level are distributed along the axial direction of the water inlet, and The stirring knives all include a plurality of blades that are evenly distributed in the circumferential direction and are used to strike coal water impurities when rotating at high speed. The crushing mechanism disclosed in the present invention rotates at a high speed during operation, so that the coal water impurities are graded and crushed in the process of passing through the water inlet, and the size is rapidly reduced. When finally reaching the coal mine slurry pump, the particles of coal water impurities are enough Small and able to pump smoothly. Therefore, when the coal mine slurry pump discharges the coal water at the low-lying point of the coal mine site, the suspended impurities (such as coal gangue, etc.) can be classified and crushed to reduce the particle size of the entrained particles in the sewage and reduce the probability of pipeline blockage accidents. Improve pump operating efficiency. The present invention also discloses a coal mine slurry pump comprising the crushing mechanism, and its beneficial effect is as above.

The present invention provides a cigarette cartridge and an electronic cigarette. The cigarette cartridge comprises: an atomizer, wherein the atomizer comprises a supporting base and an atomizing headassembled in the supporting base; a liquid storage cabin which is arranged on the supporting base in a sleeving manner, wherein a tobacco tar cavity is defined between the liquid storage cabin and the supporting base; and a liquid pump which is used for pumping the tobacco tar in the tobacco tar cavity to the atomizing head, and the liquid pump comprises a liquid pumping port, the atomizing headcomprises a bearing part, the bearing part faces the liquid pumping port, and the bearing part is made of a hard material. According to the smoke cartridge and the electronic cigarette, due to the fact that the starting speed of the liquid pump is high, the pressure is high when tobacco tar is pumped, and the bearing part is made of the hard material, it is avoided that when the tobacco tar with the high pressure impacts the bearing part made of the soft material, the atomizing head fails, and liquid leakage is caused.

The invention relates to the technical field of cubic press, and particularly relates to a vacuum exhaust valve and a cubic press comprising such vacuum exhaust valve. The vacuum exhaust valve comprises an exhaust bolt which is provided with an exhaust hole, a lower part of the exhaust bolt is arranged in the exhaust hole through a thread and an upper part of the exhaust bolt stretches out the exhaust hole and forms an air pumping connector, a valve needle is arranged in the exhaust hole from bottom to top through penetration, the valve needle comprises a guide rod part and a blocking part, anupper end of the blocking part and a lower end face of the exhaust bolt block upwards in cooperation, a lower end blocks downwards and seals a small-diameter end of the exhaust hole, the lower end face of the exhaust bolt is provided with a transverse groove, an inner wall of the exhaust hole is provided with a vertical groove, the transverse groove and the vertical groove are correspondingly communicated so as to form an air channel for gas to flow to an air pumping hole from the exhaust hole. The vacuum exhaust valve provided by the invention has high pressure bearing capability, can adaptto exhaust requirements of an ultrahigh pressure hydraulic system, and simultaneously, is convenient for a vacuum pump to perform vacuum supply for a press cylinder, thus, exhaust efficiency is improved essentially.

The invention relates to a pressure relief protection gear pump, a manufacturing method and a pressure relief protection method of the pressure relief protection gear pump. The pressure relief protection gear pump comprises a pump cavity which is internally provided with a driving gear and a driven gear, the driving gear and the driven gear are meshed with each other, and the portion, located on the top of the driving gear and the driven gear, of the pump cavity is provided with a floating valve which can be bounced off under the overload condition to relieve pressure. The pressure relief method of the gear pump includes the steps that when fluid entering the pump cavity causes the situation that the pump cavity pressure exceeds the elastic force of the floating valve, a valve piece is jacked up, and vacuum in the pump cavity disappears; and secondly, the fluid of the pump cavity flows back along an inlet of the pump cavity, and therefore the pump cavity pressure is released, and when the pump cavity pressure is smaller than the elastic force of the floating valve, the valve piece resets. The pump cavity has the self-protecting function; when the pressure in the pump cavity is overloaded, it is guaranteed that the floating valve piece can be bounced off to relieve pressure, and accidents of pump burst or motor burnout caused by overpressure can be avoided. By means of the manufacturing method, the technological process of production of the gear pump can be simplified so that cost can be reduced.