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44results about How to "Good flushability" patented technology

Dual-arm backward erosion corrosion testing device

The invention discloses a dual-arm backward erosion corrosion testing device. The dual-arm backward erosion corrosion testing device comprises a bracket, a test groove, a computer feedback control system, an electrochemical workstation and two groups of transmission systems, wherein a heater is arranged in the test groove; each group of transmission systems comprises a frequency converter, a rotary table, a sample frame, a revolving shaft and a motor connected with the frequency converter; the motors are connected with upper ends of the revolving shafts; lower ends of the revolving shafts are vertically connected with the rotary tables; the sample frames are vertically connected with the revolving shafts; the computer feedback control system comprises a computer and a control cabinet; the heater and the two frequency converters are connected with the control cabinet; the control cabinet is used for controlling the two groups of transmission systems to drive the two revolving shafts to rotate reversely in order to drive the sample frames on the two rotary tables to rotate in the test groove; outer walls of the revolving shafts are provided with electrochemical assemblies which are connected with the electrochemical workstation, and rotation speed sensors which are connected with the computer. By adopting the dual-arm backward erosion corrosion testing device, dual-shaft reverse rotation is adopted, so that a more accurate relative motion speed can be obtained during rotation of a sample, the flow state stability of a medium can be improved, and an optimal erosion effect is achieved.
Owner:725TH RES INST OF CHINA SHIPBUILDING INDAL CORP

Implantable shaftless heart pump based on gradual change of flow passage

The invention relates to an implantable shaftless heart pump based on the gradual change of a flow passage. The implantable shaftless heart pump is characterized by comprising a flow passage inlet shell, a stator and a flow passage outlet shell, wherein the flow passage inlet shell, the stator and the flow passage outlet shell are sequentially and axially fixedly connected. The inner wall parts ofshell cavities of the flow passage inlet shell and the flow passage outlet shell are respectively provided with straight-through sections.The inner ports of the straight-through sections are respectively in transition connection with the outer ports of contraction sections, and the inner ports of the contraction sections are respectively arranged at the outer ports of the stator.Profile lines ofthe inner wall parts of the shell cavities of the flow passage inlet shell and the flow passage outlet shell are elliptical. The contraction sections of the inner diameters of the flow passage inlet shell and the flow passage outlet shell are arranged near one side of the stator. The inner wall of the stator is fixedly provided with a stator coil, the middle part of the stator coil is provided with an impeller rotor, and the impeller rotor is fixed through permanent magnetic suspension bearing shafts at two ends.The implantable shaftless heart pumphas the advantages of small volume, large flowand small heat productivity, and can effectively reduce the probability of thrombus formation.
Owner:HOHAI UNIV +1

Toilet bowl control system and method

A system of controlling a flush toilet (20), which includes a first flushing channel (21) and a second flushing channel (22), and the system contains: a depressurizing valve (31) including an inlet (311) connecting with an inlet pipe fitting (314), a first outlet (312), and a second outlet (313); a first water-supply pipe fitting (32) employed to supply water from the first outlet (312) of the depressurizing valve (31) toward the first flushing channel (21) of the flush toilet (20); a second water-supply pipe fitting (33) applied to supply the water from the second outlet (313) of the depressurizing valve (31) toward the second flushing channel (22) of the flush toilet (20); a first solenoid valve (34) controlled to start and stop the first water-supply pipe fitting (32); a second solenoid valve (35) controlled to start and stop the second water-supply pipe fitting (33); a water pressure sensor (36) used to sense a water pressure in the depressurizing valve (31) and to transmit a pressure signal (P); a control unit (37) served to receive a flushing signal (W) started by a user and the pressure signal (P) from the water pressure sensor (36), such that after receiving the flushing signal (W), a starting and closing sequence and starting times of the first solenoid valve (34) and the second solenoid valve (35) are controlled based on the pressure signal (P).
Owner:GLOBE UNION INDAL

Device for increasing drainage volume of immersible pump

The invention discloses a device for increasing the drainage volume of an immersible pump. The immersible pump is fixed in a reservoir. An immersible pump water inlet, an immersible pump cavity and an immersible pump water outlet of the immersible pump are lower than a working water level of the reservoir, and an opening of the immersible pump water outlet faces a sleeve. The sleeve is fixed to the upper portion of the immersible pump. The sleeve comprises a sleeve water inlet pipe and a sleeve water outlet pipe. The immersible pump water outlet is sleeved with the sleeve water inlet pipe, and the outer diameter of the top end of the sleeve water inlet pipe is smaller than the inner diameter of the water inlet end of the sleeve water outlet pipe, so that a water inlet of the sleeve is formed between the top end of the sleeve water inlet pipe and the sleeve water outlet pipe. The water outlet of the sleeve water outlet pipe is higher than a water outlet of the sleeve of the working water level of the reservoir. As for the device, through the double-superposition effect of water in the reservoir, the drainage volume of the immersible pump is greatly increased, and the purposes of saving electricity, reducing the occupied space of a pump body and reducing the cost of the immersible pump are achieved.
Owner:XIAMEN HUIERJIE SANITARY WARE TECH CO LTD

Calcium carbonate isolation solution for large-porosity easy-to-leak oil gas layer well cementation

The invention discloses a calcium carbonate isolation solution for large-porosity easy-to-leak oil gas layer well cementation. The calcium carbonate isolation solution is prepared from the following components in parts by weight: 100 parts of clean water, 2.4 to 2.8 parts of a washing agent, 0.13 to 0.21 part of a diluting agent, 1.1 to 5.6 parts of a suspension stabilizing agent, 0.24 to 3.36 parts of a drag reducing agent, 18 to 205 parts of a calcium carbonate increasing agent and 0.05 to 0.12 part of a de-foaming agent, wherein the calcium carbonate increasing agent is prepared from the following components in percentage by mass: 6 to 10 percent of light calcium carbonate with the grain diameter of 80 to 120 meshes, 10 to 15 percent of light calcium carbonate with the grain diameter of120 to 160 meshes and 74 to 84 percent of light calcium carbonate with the grain diameter of 160 to 200 meshes; the calcium carbonate isolation solution has a good oil gas leakage layer blocking capability and acid solubility; a blocked oil gas layer leakage channel can be unblocked through an acidification yield-increasing measure and the oil gas yield is recovered; meanwhile, the calcium carbonate isolation solution has good flowability and a washing effect of a large grain diameter on a well wall mud cake; the interface cleanliness can be improved and the interface crossing strength of cement is improved. Meanwhile, the calcium carbonate isolation solution has a wide density applicable range and good suspension stability.
Owner:CNPC BOHAI DRILLING ENG +1
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