33results about How to "Avoid oily" patented technology

The invention discloses a method for preventing oil from bleeding from a solder resist ink plug hole. The method comprises the following steps of: manufacturing single-surface and double-side windowing via hole plugging aluminum sheets and non-windowing plug hole aluminum sheets; plugging single-surface and double-side windowing via holes of a PCB (Printed Circuit Board); when the single-surface windowing via hole is plugged, displaying exposed point films on one surface where the windowing via holes are not windowed; and then plugging non-windowing via holes. According to the method disclosed by the invention, solder resist ink is printed after the plugging is carried out in graded times, so that the problem of oil bleeding in the plugging process of single-side windowing, double-side windowing and non-windowing PCB is effectively solved; and the quality and service performance of products are improved.

The invention discloses an energy-saving drying method for cured meat products, which comprises a drying and baking main body. The drying method comprises the following steps that: (1) cured meat products required to be dried are hung in the drying and baking room with first preset air flow and first preset temperature, a ventilation door is opened, and the cured meat products exchange heat with hot air in the drying and baking room through convection to rapidly drain moisture out of the drying and baking room along with air; (2) after the moisture is rapidly drained in first preset drying time, the temperature of the drying and baking room is adjusted to second preset temperature, and the drying air flow in the baking room is adjusted to second preset air flow according to the change of humidity in the baking room to keep the drying rate of the cured meat products at certain gradient; and (3) after the balanced drying of the cured meat products in the second preset drying time, the ventilation door is opened, the temperature of the drying and baking room is reduced to third preset temperature, and hot air with third preset air flow is kept to flow in third preset drying time to enable the cured meat product to be well shrunk.

The invention provides an inelastic scattering gamma-ray spectrometry analysis method and device. The method comprises the steps as follows: inelastic mixed spectrum and capture spectrum are measuredin a neutron pulse cycle and subjected to normalization processing; the normalized capture spectrum is added to an element first inelastic standard spectrum matrix obtained in advance, and an elementsecond standard spectrum matrix corresponding to the capture spectrum is obtained; the inelastic mixed spectrum is analyzed through the element second standard spectrum matrix, and contribution ratesof elements and the normalized capture spectrum for the inelastic mixed spectrum are obtained; the contribution rates of all the elements for the inelastic mixed spectrum are normalized, and inelasticspectrum relative yields of all the elements are obtained. Pure inelastic spectrum is not required to be obtained firstly during measurement of inelastic spectrum relative yields of all the elements,so that the defect of inaccurate underground stratum oil saturation due to defects of a fixed pure spectrum coefficient method which is mainly adopted at present can be overcome.

The invention belongs to the technical field of petroleum asphalt, and particularly relates to a warm mix asphalt mixture and a preparation method thereof. The warm mix asphalt mixture is prepared from the following raw materials in parts by mass: 95 parts of a mineral material, 5 parts of warm mix asphalt, 0.5-2 parts of a viscosity reducing lubricant and 0.05-1 part of fibers. According to the warm mix asphalt mixture disclosed by the invention, the added fibers and the viscosity reducing lubricant are swollen into the asphalt during wet mixing and transportation to form a gel layer, so thatan elastic recovery function and mechanical properties of an asphalt pavement are improved; the fibers exists in the asphalt mixture in the form of a three-dimensional dispersed phase, as reinforcingsteel in concrete has a reinforcement effect; and because a thickness of an oil film is improved, pavement bleeding and rutting can be effectively avoided. The preparation method disclosed by the invention is simple and easy to implement and realize.

The invention provides an oil pump rotor assembly. The tooth shapes of an inner rotor and an outer rotor in the oil pump rotor assembly are composed of envelope curves of a hypocycloid formed by a fixed connection point on a rolling circle and circular arcs through the mode that the rolling circle purely rolls along a fixed base circle. According to the oil pump rotor assembly, the tooth shapes ofthe inner rotor and the outer rotor are set through appropriate parameters, the appropriate meshing clearance is set, edge bulging and crest cutting of tooth crests of rotors in a traditional rotor pump are avoided, the problems of tooth crest meshing abrasion, vibration, noise, meshing oil-trapping during working of the traditional rotor pump are effectively solved, meanwhile, the displacement of an oil pump is increased, and the efficiency is improved.

The invention discloses a road construction method, and solves the problems that asphalt road surfaces are frequent in cracking, low in intensity and poor in stability because of non-standard construction of many regions. The road construction method is characterized by adopting the technical scheme comprising the following steps of (a), cleaning and levelling a road surface of a road requiring paving, and forming a roadbed for pond residues to fill and pave; (b), sequentially paving a first pond residue processing layer and a second pond residue processing layer; (c), grinding macadam materials to form a macadam cushion layer of which the crushing value is 30%, and paving the macadam cushion layer on the second pond residue processing layer; (d), paving a cement stabilizing crushed stone layer of which the cement content is 3-6%; (e), uniformly sprinkling petroleum asphalt of which the consumption is 1.2 Kg/m<2>, then sprinkling aggregates, and immediately grinding the aggregates by a road roller to form a lower sealing layer; and (f), paving an asphalt mixed material layer of which the void percentage is 3-6%. The road construction method disclosed by the invention has the advantages of being high in strength, not liable to crack and strong in durability.

The invention relates to a method for improving solder resist oil leakage of a PCB, which comprises the steps of ink preparation, PCB processing, hole plugging and oil printing, pre-baking, film manufacturing, alignment exposure and thermocuring. The method solves the problem of solder resist oil leakage of the PCB by controlling various parameters.

The invention discloses a bituminous pavement reinforcing material. The bituminous pavement reinforcing material is prepared from the following raw material components in percentage by weight: 40-60% of cotton stalk cellulose, 20-45% of basalt fiber, 5-10% of polyester fiber, 3-5% of polyethylene and 1-2% of carbon black. The bituminous pavement reinforcing material has the advantages that strength of a pavement can be improved, the pavement can be prevented from cracking at a low temperature, and temperature shrinkage cracks are reduced; at a high temperature, partial bitumen expanded after being heated is absorbed, so that oil bleeding and high temperature loss of the bitumen, which are caused under a high temperature, are prevented; high temperature stability is improved, and the service life of the pavement is prolonged; pavement oil spot caused by formation of a micelle-shaped substance is prevented; leak and isolation of the bitumen are prevented; raw materials are available, a preparation process is simple, and cost for laying a bituminous pavement is greatly reduced.

An oil gun, which contains gun body including upper and lower section, the upper is the joint injection rod with nozzle in head, oil filled piston cylinder in middle section with piston and reset spring, the lower section is connection cover connected with oil tank having suction pipe, screw plug set in open of oil filled cylinder, stop ring, seal ring for preventing the oil from leakage when the manual wrench turns to press the piston making oil to bottom of piston cylinder.

The invention relates to an oil injection device of a ketone-benzene drum filter and an automatic oil replenishing machine of the oil injection device. The oil injection device of the ketone-benzene drum filter comprises an oil injector. The automatic oil replenishing machine is arranged on the outer portion of the oil injector and comprises an oil tank and a liquid level control device. The oil tank is used for injecting oil into the oil injector and is communicated with the oil injector by a communicating pipe, the communicating pipe is lower than a set oil level, an oil inlet is formed in the oil tank, and the liquid level control device is used for controlling opening and closing of the oil inlet, so that an internal liquid level of the oil tank is positioned at the set oil level. The oil injection device and the automatic oil replenishing machine have the advantages that the internal oil level of the oil injector can be automatically controlled, so that oil in the oil injector can be positioned at the set liquid level, labor can be saved, and oil overflow or oil starvation phenomena can be prevented.

The invention relates to a full-sealed leakage-free magnetic drive hydrogen circulating pump. The hydrogen circulating pump comprises a motor cavity and a pump shell; a sealing partition plate is arranged between the motor cavity and the pump shell; a stator winding is fixedly installed in the motor cavity; an impeller is rotationally installed in the pump shell; a permanent magnet rotor is fixedly inlaid in the surface of the impeller; an iron core and a coil of the stator winding are designed in a plane mode; the magnetic field plane of the stator winding faces the permanent magnet rotor on the plane of the impeller; the stator winding generates a magnetic field to drive the permanent magnet rotor to drive the impeller to rotate; and the pump shell is provided with a gas inlet and a gas outlet. The hydrogen circulating pump can effectively prevent a medium from containing oil, a motor stator and the motor permanent magnet rotor are sealed and isolated, the permanent magnet rotor and the impeller are integrated, the medium is completely sealed, medium leakage is completely avoided, and potential safety hazards are avoided.

The invention relates to a low-temperature-resistant oil-base ink, belonging to the technical field of writing inks. The ink is prepared from the following raw materials in percentage by mass: 45-95% of solvent, 1-50% of colorant, 1-40% of resin, 0.1-2% of viscosity modifier and 0.01-3% of thixotropic agent. The viscosity of the ink is 500-3000 mpa.s when the temperature is 25 DEG C and the shear rate is 500 S<-1>, and the viscosity is 1000-5000 mpa.s when the shear rate is 5 S<-1>; and thus, the ink can improve the writing lubricating property in a low-temperature environment, reduce the writing pressure and prevent the penpoint from bleeding, and can not have the phenomenon of broken lines.

The invention relates to a full-sealed leakage-proof oil-free compressor system. The system comprises a motor assembly and a compressor assembly. The motor assembly comprises a motor shell and a motorshaft, the upper end of the motor shell is fixedly connected with a potting junction box, the motor shaft is connected with the motor shell through a bearing, the middle of the motor shaft is fixedlyconnected with a potting motor rotor, a permanent magnet is fixed in the potting motor rotor, a potting motor stator is fixed in the motor shell, and a shaft seal is arranged between the motor shaftand the motor shell. The compressor assembly comprises a compressor shell and a compressor shaft, a shaft seal is arranged between the compressor shaft and the compressor shell, the motor shaft is connected with the compressor shaft through a coupling, and the outer portion of the coupling is covered with a sealing cover. The full-sealed leakage-proof oil-free compressor system is composed of theleakage-proof and explosion-proof stator and rotor, a junction box potting motor and a full-enclosed oil-free compression mechanism, so that oil is effectively prevented from being contained in a medium, the medium is prevented from leaking, and explosion prevention of the motor is realized.