61results about How to "Overcome shortcomings" patented technology

The invention relates to steel suitable for a drill rod joint in a low-temperature environment and a heat treatment process of the steel. The steel used for a drill rod joint comprises the following components by weight percent: C 0.25-0.35%, Mn 0.50-1.00%, P<=0.015%, S<=0.008%, Mo 0.15-1.00%, Ni 0.75-1.50%, Cr 0.80-1.50%, two or more of Si<=0.30%, Al<=0.03%, V<=0.10%, Ti<=0.03% and Re<=0.005%, and the balance of Fe and inevitable trace elements. The heat treatment process of the steel suitable for a drill rod joint is as follows: heating the steel in a furnace to 900-960 DEG C; carrying out heat insulation for 1.0-1.5 hours; putting the steel into a quenching medium and cooling down completely; tempering at the temperature of 660-690 DEG C; carrying out heat insulation for about 2.0-2.5 hours; and then taking the steel out of the furnace. After the steel is treated according to the process, when the yield strength of the steel is 905MPa, longitudinal and full-size charpy impact power average value at -60 DEG C is 110J, the fracture fiber rate is 100% on the average, and the ductile-brittle transition temperature is -85 DEG C.

Disclosed is a femented beverage with black tea bacterium as the bacterial and its brewing process, which employs by-product of red date or jujube fabrication as the raw material, and utilizes saccharomycete, Acetobacter xylinum and plant lactic acid bacillus as the bacterial through the procedures of first stage culturing, second stage culturing, fermentation, centrifugation and germ-free filtration.

The invention relates to a large-torque actuator loading testboard comprising a part (3) to be tested, a servo motor (1), an input torque sensor (2), an output torque sensor (4), an oscillating cylinder (5), a servo valve (7) and a hydraulic pump (8), wherein the part (3) to be tested is positioned between the input torque sensor (2) and the output torque sensor (4); the servo motor (1) is connected with the input torque sensor (2); the output torque sensor (4) is connected with the oscillating cylinder (5); the servo valve (7) is positioned between the oscillating cylinder (5) and the hydraulic pump (8); one end of the servo valve (7) is connected with the oscillating cylinder (5), and the other end of the servo valve (7) is connected with the hydraulic pump (8). The invention overcomes the defects that the traditional device for testing wing flaps has a complex structure and can not test a plan by simulating the actual working conditions of a product on the plane, can test the plane by simulating the actual working conditions of the product on the plane and has simple structure and high test accuracy.

The invention aims to provide a W-type ferrite absorbent for millimeter waves, namely the absorbent used for the frequency band from 26.5GHz to 40GHz. The preparation raw materials of the absorbent are BaCO3, Co2O3, ZnO and Fe2O3; the traditional solid phase reaction method is used in the invention, the main steps are dosing, ball-milling, pre-burning, crushing and sintering, so as to prepare the W-type ferrite absorbent. The W-type ferrite absorbent prepared by the invention has the advantages of high magnetic conductivity, high magnetic loss, lower dielectric constant and the like on the frequency band from 26.5GHz to 40GHz, and the disadvantages of metal soft magnetic material absorbents and common ferrite absorbents are overcome, therefore, the formed ferrite has excellent wave absorbing property; compared with the M-type ferrite absorbent, both Co2O3 and ZnO in the preparation raw materials are cheaper and more available than CoO and TiO2, and furthermore, the Co replacement amount is low and the sintering temperature is reduced, therefore, the cost is reduced effectively, and the wave absorbing property is more excellent.

The present invention relates to vibration isolator, and is especially is one combined pendulum type pneumatic vibration isolator. The gimbal rod seat is suspended on ball inside the suspended cup, the suspended cup is suspended inside the turned pendulum, and the pendulum is separated by one spacer plate into elastic gas bag cavity and damping gas bag cavity to form one traditional single pendulum structure. The single pendulum structure is located on one ball inside the base seat and four horizontal regulating spring in the same horizontal plane is used to connect the turned pendulum with the base seat and to form one turned pendulum structure. Via regulating the rigidity of the springs and their distance to the support seat, the inherent frequency of the system may approach zero. The present invention may be used widely in scientific research and production to eliminate external low frequency vibration.

The invention belongs to the technical field of electricity, discloses a resistance grounding system, and particularly relates to an automatic control resistance grounding system. One end of a neutral-point isolating switch is connected with one end of a neutral-point current transformer, the other end of the neutral-point isolating switch is connected with one end of a power transformer, the other end of the neutral-point current transformer is connected with one end of a thyristor which can be opened and closed, the other end of the thyristor which can be closed is connected with a neutral-point grounding resistance, the other end of the power transformer is connected with a voltage transformer, and two triangle ends of a secondary opening of the voltage transformer is connected with the relay for controlling the opening and closing of the neutral-point thyristor. The automatic control resistance grounding system improves the reliability of medium-voltage power distribution, prevents the occurrence of cable fires, and can be widely applied in 3 to 35kV industrial enterprises and city network power distribution systems.

The invention discloses a camera mounting rack which comprises a fixed plate, a telescopic rod, a support table, an angle adjusting ball and a mounting pipe, wherein the fixed plate is used for beingfixed to a wall surface; a connecting lug seat is fixed on the obverse side of the fixed plate; one end of the telescopic rod is rotatably connected with the connecting lug seat; one end of the support table is rotatably connected with the end, far away from the fixed plate, of the telescopic rod; a mounting groove is formed in the support table, and the wall surface of the mounting groove is a spherical surface; the angle adjusting ball is mounted in the mounting groove of the support table and can freely rotate in the mounting groove; and one end of the mounting pipe is fixed on the upper surface of the angle adjusting ball, a plate is fixed at the other end of the mounting pipe, and the plate is used for mounting and fixing a camera. The camera mounting rack can provide support for multi-angle adjustment and rotation of the camera; and under the circumstance that the mounting condition is more special, the aligned direction of the camera is more special or the aligned direction of the camera needs to be adjusted from time to time, the camera can meet the requirements, so that the defects of the existing mounting rack can be overcome.

A flexible valve comprising a flexible sleeve (3) inserted in a fluid line (2) and formed with two folds (9a, 9b); , 9b) and extend transversely to the sleeve (3) opposite slides (5, 6); The device is displaced between closed positions in which the slides (5, 6) tightly press the closing portion between the folds (9a, 9b) such that the sleeve (3) is closed to the through flow. The folds (9a, 9b) extend freely between the connection (8) of the sleeve (3) to the fluid line (2) and said closing part (11) further supported by the slide (5, 6) .

The invention discloses a liver-protecting and intestine-protecting immunopotentiation composition for freshwater fish. The liver-protecting and intestine-protecting immunopotentiation composition comprises the following raw materials in parts by weight: 15 to 27 parts by weight of herba andrographitis, 18 to 22 parts of folium isatidis, 10 to 15 parts of polygonum hydropiper, 8 to 12 parts of radix et rhizoma rhei and 8 to 12 parts of gallnut. The invention further discloses a preparation method and an application for the composition. The composition provided by the invention has the effectsof resisting bacteria, scavenging free radicals, clearing away heat and toxic materials, preventing and treating enteritis and the like, and can effectively improve the immunity of the freshwater fishand guarantee the body health of the freshwater fish.

The invention relates to the technical field of power transmission systems of hybrid power vehicles, in particular to a four-wheel-independently-controllable distributed drive hybrid power electric car power system. The system mainly comprises a motor, a power generator, an engine, a brake, a planetary gear mechanism, a clutch and a planetary gear rack, wherein the output shaft of the engine on a front drive axle is connected with the planetary gear rack of the planetary gear mechanism through the clutch and connected with the brake. The invention further provides an application method of the four-wheel-independently-controllable distributed drive hybrid power electric car power system. The four-wheel-independently-controllable distributed drive hybrid power electric car power system has the advantages that by the planetary gear mechanism, vehicle controllability and stability are increased, and vehicle energy utilization efficiency is increased; the difficulty that an existing vehicle cannot independently control the output torque and rotation speed of the four wheels is solved, and the unmature market space of electric cars is filled up.

The invention discloses a circuit for testing the voltage drop of a contact in an electrical life experiment of an AC electric appliance, relates to the measurement for the voltage drops of the contacts of a relay, a contactor and a switch, and can greatly improve the measurement range while considering the test precision. The AC voltage source in a tested circuit excites a load and a tested contact pair which are in a series relationship. The voltage drops of the small contacts at the two ends of the tested contact pair passes through a low-pass filter into a two-way voltage amplifier with high impedance and low power, and the amplified voltage signal enters a voltage amplifier with adjustable gain to obtain an output voltage, wherein the amplitude is in a secondary function relation withthe voltage drop of the contacts of the contact pair. The output voltages of the voltage amplifier with adjustable gain and the two-way voltage amplifier with high impedance and low power enter a multi-way AD converter to be converted into digital quantities. A zero-flux Hall current sensor group and the voltage amplifier with adjustable gain are arranged in the circuit, so that the measurement range can be greatly improved while the test precision is considered, and the shortcomings of the existing measuring instrument can be effectively overcome.

The invention discloses a manufacturing method of an oversized wax mould. The method comprises the following steps: S1, the wax mould is equally divided, specifically, the wax mould is equally divided according to the integral structure of the wax mould, so that the structure and the shape of each part of the wax mould are consistent, and a single wax mould is manufactured; S2, wax mould correction is performed, wherein the manufactured single wax mould is placed in a correction mould, and the single wax mould is precisely corrected; S3, wax mould assembling is performed, specifically, the corrected single wax mould is placed in an assembling tool in an abutting mode and is pressed and fixed; and S4, wax mold repairing is conducted, specifically, a gap between every two adjacent single wax molds is bonded and repaired, the whole wax mold is taken down after the bonding seam is shaped, and then the oversized wax mold meeting the required size requirement is obtained. According to the manufactruring method disclosed by the invention, any oversized wax mold can be produced by adopting conventional mold manufacturing equipment, meanwhile, the size of the wax mold can be flexibly adjusted through the assembling tool, the size of the wax mold is ensured by the tool, the precision is high, the consistency is good, the production cost is reduced, and the market competitiveness is greatly improved.

The invention discloses a metal anti-wear lubricant additive for hard and soft double films and preparation method of the metal anti-wear lubricant additive, and relates to the field of automobile oiland industrial chemical. The metal anti-wear lubricant additive is prepared from the following components by weight: 1%-3% of sodium dibutyl dithiocarbamate, 1%-5% of ethylene oxide cyclohexyl acid,3%-10% of bromo-hydrocarbons, 20%-55% of long chain 42 chlorinated paraffin, 8%-23% of refined base oil, 1%-9% of boracic acid, 4%-28% of triethanolamine and 4%-26% of dimethylbenzene. According to the metal anti-wear lubricant additive, the secondary damages such as corrosion, hydrolysis, instability and non-environmental-protection in anti-wear lubricant additives in the same industry are achieved, the functions of anti-extreme pressure and anti-friction of the anti-wear lubricant additive can be developed enduringly, and very good metal repairing function is achieved, and the metal anti-wear lubricant additive is a metal anti-wear lubricant additive which has practical value and capable of achieving environmental protection and emission reducing.

The invention provides a washing composition for removing oil stain whose constituents include bee honey, sesame oil, tea-seed oil and other known natural plant raw material, the end product washing agent has a pH of 6.5, it causes no damage to human body and clothes, no pollution to environmental, and is suitable for removing oil stains on clothes.

The invention discloses a manufacturing method for an electron mirror. The electron mirror consists of an optical imaging mirror, an electronic display screen, an electronic camera and the like. Besides functions of a normal mirror, the electron mirror further can shoot images via the camera, and the images are displayed on the display screen. When looking into a common optical mirror, a user only can see the self front appearance but cannot observe conditions of the back part and self secrete parts. By the aid of the electron mirror, the user not only can see the self front appearance, but also can see conditions of the self back and the secrete parts, for example, the electron mirror can be used for examining decayed teeth of the oral cavity of the user, and the like. Images shot by the electron mirror can be stored in a carried internal memory and a mobile carrier, and accordingly the electron mirror has functions of a digital camera.

The invention relates to the field of voice signal processing and intelligent control, in particular to a voice control intelligent toy car system based on TMS320VC5509A. The difference is as follows:the system comprises a voice recognition module which is an LD3320 chip, template keywords are preset in the LD3320 chip, the voice recognition module performs spectral analysis on input voice signals through an ARS voice recognition technology to extract parameters representing voice features in the input voice signals, then the parameters are compared with the template keywords, and the keywordwith the highest matching degree is found out to serve as a voice recognition signal to be output; the system also comprises a DSP processor, which is a DSP chip of TMS320VC5509A, the input end of the DSP processor is connected to the voice recognition module, and the DSP processor is used for converting the voice recognition signal output by the voice recognition module into a control signal andsending the control signal to a control object of a toy car so as to execute a corresponding action command. The system overcomes the defects of a man-machine interaction plate of an existing toy car, achieves voice control, and is high in performance and low in power consumption.