32results about How to "No destructive damage" patented technology

The invention relates to the technical field of vacuum pumps, and in particular relates to a roots vacuum pump. The vacuum pump comprises a motor, front and back bearing cavities, a roots cavity and a gear cavity, wherein the front and back bearing cavities are located at the both sides of the roots cavity, and the gear cavity is connected with the back bearing cavity; the roots cavity is provided with an air inlet and an air outlet and is internally provided with a driving rotor shaft and a driven rotor shaft; the driving rotor shaft and the driven rotor shaft are respectively and correspondingly provided with a roots driving rotor and a roots driven rotor; one end of the driving rotor shaft is connected with the motor, and the other end of the driving rotor shaft is provided with a driving gear; one end of the driven motor shaft is provided with a driven gear which is in transmission connection with the driving gear and accommodated in a gear box; and the front bearing cavity and the back bearing cavity are internally provided with bearings and bearing support rings which are sleeved and fixed at the both ends of the driving rotor shaft and the driven rotor shaft. The roots vacuum pump has the advantages of being small in size, high in pumping speed, energy-saving, space-saving, and applicable to IC equipment.

The invention provides an on-line plant glucose detection method based on the microelectrode biosensing technology. The method comprises the steps of inserting a glucose oxidase microelectrode into a to-be-detected plant tissue, and connecting an electrochemical workstation for cyclic voltammetry scan, so as to achieve the on-line glucose detection of the plant tissue. The invention also provides a device used for achieving the detection method. The device comprises the electrochemical workstation and the glucose oxidase microelectrode which are connected through a conducting wire. According to the on-line plant glucose detection method and the device, the real-time detection of the plant glucose content can be achieved, the detected part of the plant does not need to be separated from the plant body, and has no destructive damage; the vivo detection can be carried out only through surface cleaning and tissue fixing, and continuous results are obtained for dynamic analysis; the detection device provided by the invention is convenient to carry and simple in detection condition, can be operated in the field, and achieves continuous on-line detection.

The invention discloses a method for casting a large-sized silicon ingot, relating to the technical field of manufacturing methods of silicon ingots. The method comprises the following steps: (1) modifying a thermal field in a G5 ingot furnace till the thermal field is consistent with the arrangement requirements of a bottom plate, side plates and a crucible of the G6 ingot furnace, and arranging the bottom plate, the side plates and the crucible of the G6 ingot furnace in the thermal field; (2) heating; (3) melting; (4) crystallizing; (5) annealing; (6) cooling. By adopting the method, upgrade of the thermal field is realized on the premise of not changing large-sized thermal field components such as heaters, radiators and the like, and the yield of a Jinggong 500N ingot furnace is released to the maximum extent; meanwhile, the modification cost of the method is low, the original heating structure of the thermal field is not damaged, damage to thermal field components is eliminated, the thermal field can be directly changed into a G5 small-sized silicon ingot thermal field under an proper production demand, and convenience is brought to use.

The invention discloses a resistance lowering device and method for the power cable high-resistance fault point.The resistance lowering device comprises a high-voltage pulse generating part and a direct-current arc maintaining part, wherein the high-voltage pulse generating part and the direct-current arc maintaining part are in parallel.The high-voltage pulse generating part is connected with the direct-current arc maintaining part through a sphere gap, a magnetic switch and a silicon stack; when the resistance lowering device for the power cable high-resistance fault point operates, pulse voltage is firstly output, and a direct current for keeping arc burning is finally output.When the resistance lowering device for the power cable high-resistance fault point operates, a high-voltage pulse firstly acts on a high-resistance fault point of a cable, after the high-resistance fault point of the cable is broken down by the high-voltage pulse and arc discharging is carried out, resistance is decreased to be close to a short circuit, and the direct-current arc maintaining part provides the direct current for the high-resistance fault point to keep arc burning till the high-resistance fault point is subjected to resistance lowering.According to the resistance lowering device and method, under the condition that the power cable is not damaged, main insulation of the cable of the high-resistance fault point can be partly carbonized within ten more seconds to dozens of seconds, and resistance to ground of the fault point is subjected to resistance lowering.

The invention relates to a production technology of a large bending moment and high strength post tensioning reinforced concrete electric pole and an electric pole, and mainly aims at providing the production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole and the electric pole produced by using the post tensioning production technology. The production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole includes the steps of 1, weaving a reinforcement cage, and confirming that taper degrees of all seamless steel tubes in the reinforcement cage relative to the axis of the reinforcement cage are equal; 2, hoisting the reinforcement cage into a base seat of an electric pole steel mold, pouring concrete sizing agents into the electric pole steel mold, closing the mold, lifting the mold off the base seat and placing the mold on a balance position after centrifugal shaping, performing mold releasing after three days of natural curing, and performing the natural curing for 21 days; 3, disposing a pre-stressed steel strand in the seamless steel tubes in penetration mode, anchoring one end of the pre-stressed steel strand, tensioning the other end of the pre-stressed steel strand, and locking up the tensioned end of the pre-stressed steel strand after design value is achieved. The production technology of the large bending moment and high strength post tensioning reinforced concrete electric pole is used on the electric pole in an electric line.

The invention discloses a vacuum motor. The vacuum motor comprises a motor cavity, a bearing cavity, a Roots cavity, a gear cavity, a motor, a driving rotor shaft, a driven rotor shaft, a driven gear,a driving gear, a driving Roots rotor and a driven Roots rotor; the motor is characterized in that the bearing cavity and the gear cavity are arranged on the two sides of the Roots cavity, the motorcavity is connected with the bearing cavity, shaft seal devices are arranged between the bearing cavity and the Roots cavity and between the Roots cavity and the gear cavity, the motor is small in size, large in pulling speed and capable of saving energy and space, due to frequency control, the service life is long, a Teflon dual-lip shaft seal is adopted, the maintaining period of a pump is prolonged, an oil and gas separation device is adopted, the leakage problem of oil steam to a vacuum chamber is solved, the structure that a motor rotor and a pump shaft are integrated, and a motor statoris arranged outside an oil chamber is adopted, the problems of motor dynamic seal and motor vibration are solved, a heat expansion assembling structure is adopted in gear assembling, and unbalance andvibration of a motion part are reduced.

The invention relates to the technical field of automobile parts, in particular to an air return valve for an inner air return independent discharge spring braking air chamber to solve the problem that external harmful substance enters and damages a cylinder body, so the service life of an energy storage cavity is threatened seriously. The air return valve is characterized in that through holes are formed in a valve seat in an axial direction; hole steps are arranged in the through holes; valve ports are formed at the hole steps; axial air holes are formed between the valve ports and a cylinder wall of the valve seat in the axial direction; the end of the cylinder wall of the valve seat is provided with radial air holes which are vertical to the axial air holes; a valve bush and a valve are arranged in a large-diameter through hole, facing the hole steps, in the valve seat; one end of the valve is adhered to the valve ports, and the other end of the valve is in fit with inner holes formed in the valve bush in the axial direction; valve springs are arranged in the valve; a valve plug is arranged at the end of a small-diameter through, facing the hole steps, in the valve seat; and one end, facing the valve, of the valve plug is provided with a flow guide hole. A piston assembly end cover is saved, the inner space is fully utilized, the air return valve is sealed reliably and a sealing component is not damaged.

The invention discloses a composite board. The composite board comprises a first board body, a second board body and connecting pieces for connecting the first board body and the second board body, wherein the first board body and the second board body have respective characteristics in a one-to-one correspondence mode, each of the first board body and the second board body comprises a base plate,a stretch resistance layer and a compression resistance layer, and the compression layers comprise a plurality of protruding ribs which are parallel to one another and are uniformly arranged. The first board body and the second board body are opposite mutually, the protruding ribs on the first board body and the protruding ribs on the second board body are mutually opposite and kept at a second predetermined distance D2, and the stretch resistance layers of the first board body and the second board body have equal predetermined stretch prestress. The composite board can be used for wall spacepanels of construction modules or decoration panels or boards for other purposes.

The invention discloses a composite board. The composite board comprises a first board, a second board and a plurality of beams connected with the first board and the second board; the first board andthe second board are boards with corresponding characteristics respectively, and each comprise a base board, a stretching resistance layer and a compression resistance layer; the first board and thesecond board are oppositely arranged, the outer surface of the first board and the outer surface of the second board are parallelly arranged at the preset distance, and the stretching resistance layerof the first board and the stretching resistance layer of the second board are the same in preset stretching prestress. The composite board provided by the invention can be used for wall surface panel or decorative panel for a building module, and boards for other purposes.

The invention discloses a method for detecting a binding force of a DPC ceramic copper-plated substrate. The method comprises the following steps: producing a baking jig, coating the surface of the jig with a polybenzimidazole coating, reducing the surface hardness of the jig to load the DPC ceramic copper-plated substrate, and heating the DPC ceramic substrate by using a high-temperature nitrogen oven to comprehensively detect batch products. In the detection process, nitrogen atmosphere protection exists in the furnace, products cannot be oxidized or damaged, the products can be continuously used, and therefore the risk that defective products flow into customers and inconvenience is caused due to sampling detection omission is reduced, and the method is widely applied to the technical field of DPC ceramic copper-plated substrates.

The invention discloses a semi-automatic annular winding machine protection device which comprises a support, a protective cover, magnets and a baffle, the protective cover is fixed to the support, the protective cover half wraps a supporting wheel, the meshing position of the supporting wheel and a wire storage ring is located in a notch structure in the protective cover, the baffle is attracted to the front side of the protective cover through the multiple magnets, and the baffle is fixed to the support. The sealing part is used for sealing exposed parts of the supporting wheels; and the shield is made of polytetrafluoroethylene. According to the invention, through protection of the supporting wheel, an existing engaging-in type structure is converted into a single wire storage ring rotating structure, so that engaging-in injury is avoided. The protective cover is made of polytetrafluoroethylene materials, destructive damage to equipment is avoided, the overall structure is simple, and future maintenance is more convenient and faster.