35results about How to "Little change in structure" patented technology

The invention discloses a frequency wide-range self-adaptive repetition control method of an active power filter. First of all, voltage frequency signals of a power network are tracked in real time through a phase-locked loop, under the condition that a switch frequency is unchanged, the ratio of the switch frequency to a real-time power network frequency is calculated, finally, the integer portion of the ratio is taken as a number of beats of a fundamental wave lag of an improved repetition controller, and the decimal portion of the ratio forms a time-delay link which is approximated by use of a one-order inertia link, such that under the condition that the power network frequency fluctuates, it is ensured that the resonance frequency of the repetition controller is consistent with the actual fundamental wave and harmonic frequency of the power network, and thus the compensation effect of the active power filter in case of fluctuations of the power network frequency is not reduced.

The invention discloses an inserted chassis diagonal-brace structure of a tower crane and belongs to the technical field of the tower crane. The diagonal-brace structure of the tower crane comprises a base section, a chassis section and a diagonal brace, wherein the bottom end of the base section is vertically and fixedly connected to a crossed beam; the bottom end of the chassis section is fixedly connected to the top surface of the base section; the diagonal brace is arranged to be inclined to the crossed beam, the bottom end of the diagonal brace is fixedly connected with the crossed beam, while the top end of the diagonal brace is fixedly connected with the chassis section, a double-lug plate with a U-shaped structure and fixedly connected with the diagonal brace is arranged at the top end of the diagonal brace, and the inner width dimension of the U-shaped structure of the double-lug plate is matched with the width dimension of a main chord; the top end of the diagonal brace is sleeved on the main chord of the chassis section through the double-lug plate, and the top end of the double-lug plate is fixedly connected with the main chord of the chassis section through a connecting piece. The chassis section is reduced in overall structure dimension and strong in transportation convenience, and simultaneously, the stress condition at the connection part is improved and the weld joint quality requirement is effectively reduced. The diagonal-brace structure of the tower crane is simple and is easy to manufacture and low in manufacturing cost.

The invention relates to a compound jet pump based on the combination of center jet flow and annular jet flow. The compound jet pump comprises a working water pipe, a center nozzle, an annular nozzle,a water suction tube, a suction-in chamber, a throat tube inlet section, a throat tube, a diffusing tube and a water outlet tube. The compound jet pump further comprises a center nozzle control valveand an annular nozzle control valve. The center nozzle is arranged at the center of the annular nozzle. The center jet flow and the annular jet flow are combined. The compound jet pump solves the problems that a single center jet pump or single annular jet pump is low in efficiency, and the properties can be turned to be poor after working condition change. Compared with a traditional center jetpump and annular jet pump which are mostly used at present, the compound jet pump is small in structural change, the required parts are not greatly increased and technological processing can be achieved easily. The working efficiency is high, the problems which cannot be achieved by the traditional single jet pump are solved, and thus the application prospects are broad.

The invention provides a lithium battery liquid cooling box which comprises a casing, a flat heat pipe, a casing cover and a liquid cooler; the square casing comprises a base plate, two long side plates and two short side plates, and the base plate, two long side plates and two short side plates form a cavity for placing a lithium battery group; the flat heat pipe is placed in the bottom of the cavity, and includes a U-shaped seal pipe in the external and an imbibition core, a gas channel and a work liquid in the internal; the bottom of the flat heat pipe is placed on the base plate, the two sides of the flat heat pipe makes contact with the two long side plates respectively, and the flat heat pipe is used to transfer heat of the lithium battery group mounted in the upper to the two long side plates; the casing cover is detachably mounted on the casing, and is used to enclose the cavity; and the liquid cooling device is hollow and arranged surrounding the casing, and includes an inletand outlet, the cooling inlet enters the inside of the liquid cooling device via the inlet and flows out of the outlet, and the liquid cooling device is used to cool the two long side plates.

The invention discloses a gravity driving type bomb replacing arc extinguishing device which comprises a bomb storing bin (1) and an arc distinguishing cylinder (7). A triggering coil (11) and an arc guide fitting (10) are arranged in the bomb storing bin (1), the bottom of the bomb storing bin (1) is provided with an arc guiding electrode (9) and a gas pellet triggering position, and a side face electrode (6) is arranged on the side wall of the gas pellet triggering position. A spiral type gas pellet advance rail (2) which is arranged from top to bottom and used for bearing an arc extinguishing gas pellet (5) is arranged in the bomb storing bin (1). A gravity ball storing bin (15) is arranged on the top of the bomb storing bin (1), an opening of the gravity ball storing bin (15) is communicated with an inlet of the gas pellet advance rail (2), and a gravity ball (14) is arranged in the gravity ball storing bin (15). The gravity driving type bomb replacing arc extinguishing device is simple in structure, safe and reliable, the arc extinguishing pellet in the bomb storing bin can smoothly slide downwards only under the gravity action, and the process of exchanging a bomb after arc extinguishing is triggered is achieved.

The invention discloses a method for preparing strontium-rich activated carbon by the aid of hydrothermal processes. The method includes steps of a), pretreating activated carbon, to be more specific,placing the proportioned activated carbon in diluted edible hydrochloric acid solution, heating the proportioned activated carbon in the diluted edible hydrochloric acid solution, carrying out impurity removal cleaning, further carrying out suction filtration, repeatedly washing the activated carbon, washing off surface residual acid liquid, boiling the activated carbon by water, then repeatedlyrinsing the activated carbon until the pH (potential of hydrogen) value of the activated carbon is 6.5-8.5, placing the activated carbon in drying ovens and drying the activated carbon for standby application; b), impregnating and loading strontium salt, to be more specific, slowly adding the pretreated proportioned activated carbon into impregnation liquid with diffusing agents and coupling agents, impregnating and stirring the activated carbon for 10 min, then adding strontium salt solution into the impregnation liquid and uniformly mixing and stirring the strontium salt solution and the activated carbon with each other in the impregnation liquid; c), carrying out hydrothermal reaction procedures, to be more specific, placing impregnated activated carbon solution in hydrothermal reactionkettles, keeping the temperatures constant for 2-6 hours after the hydrothermal reaction temperatures are increased and reach 130-250 DEG C and the pressures of the reaction kettles reach approximately 1MPa, carrying out still standing and temperature reduction after reaction is completely carried out, carrying suction filtration and cleaning, washing off surface residual impregnation liquid, then placing reaction products in drying ovens, and drying the reaction products at the temperatures of 120-150 DEGC to obtain the impregnated-hydrothermal strontium-rich activated carbon.

The invention discloses a full-duplex Internet of Things base station based on a half-duplex baseband chip. The base station comprises a processor, a receiving module and a transmitting module, wherein the receiving module comprises a first radio frequency switch, a low noise amplifier, a radio frequency front end and the half-duplex baseband chip that are sequentially connected and configured ina receiving state; the transmitting module comprises a transceiver, a power amplifier and a second radio frequency switch in a transmitting state that are sequentially connected; the processor is connected to the half-duplex baseband chip of the receiving module through a bus to perform interaction between data and control instructions; and the processor is also connected with the transceiver of the transmitting module through the bus to perform the interaction between the data and the control instructions. By adopting the scheme of the invention, the defect that an existing Internet of Thingsbase station can only realize half-duplex communication can be solved, the full-duplex real-time communication can be realized, and the communication efficiency can be improved.

The invention provides a foldable electro-car. The foldable electro-car comprises an electro-car and a folding device, wherein the electro-car is steered by front wheels and driven by rear wheels and comprises a front part and a rear part; the front part is connected with the rear part by a center shaft; the front part is rotationally connected with the center shaft; the folding device comprises a remote control device, a control panel controlled by the remote control device, and a folding mechanism which is positioned inside the electro-car; the remote control device is used for sending an instruction for unfolding or folding the electro-car to the control panel; the control panel is used for controlling a motor in the folding mechanism to drive a hydraulic rod in the folding mechanism to extend or retract so that the electro-car can be unfolded or folded. The invention provides the foldable electro-car, wherein the front part of the electro-car can be lifted and partially contained in the rear part of the electro-car, so the floor area used by the electro-car can during parking can be reduced.

The invention relates to a low-temperature brazing method of a cutter. A low-temperature brazing parent part and a hard alloy blade are adopted, brazing flux is coated onto the surfaces of the parent part, brazing filler metal, a copper sheet and the hard alloy blade, the brazing filler metal is added between the parent part and the copper sheet or between the hard alloy blade and the copper sheet, the copper sheet is respectively welded onto the parent part and the hard alloy blade, then the welded part is immediately placed in a heat preserving furnace at 280-300 DEG C for preserving heat for 6-7h, the part is cooled to room temperature with the furnace after the temperature is decreased to 100-150 DEG C and the heat is preserved for 10-12h, the bottom of base metal is slowly heated, heating is stopped when the brazing flux starts to melt and can freely flow, heating is continuously performed when the brazing flux cannot flow smoothly, repetition for several times is performed in such way to weld the hard alloy blade onto the base metal, and finally the welded part is cooled to room temperature with the furnace in the heat preserving surface at 100-150 DEG C. The low-temperature brazing method of the cutter has the advantage of high production efficiency and avoids the problems that the hard alloy blade is cracked and ruptured and the like.

The invention relates to an anti-counterfeit mark structure, in particular to an anti-counterfeit approval certificate. The anti-counterfeit approval certificate comprises an approval certificate body, a fragile sticker is connected to the back side of the approval certificate body and glued to the surface of a coil, a spray portion is arranged on the front side of the approval certificate body, a transfer-preventive layer covers the front side of the approval certificate body and the spray portion, a working surface of the transfer-preventive layer is connected with No.2 fragile glue, the No.2 fragile glue is connected to the front side of the approval certificate body, and connection points where the No.2 fragile glue is connected with the approval certificate body are positioned around the spray portion. The anti-counterfeit approval certificate is transferred and reused difficultly.

The invention relates to a power supply socket which comprises a casing, on which one or more groups of socket aperture units are arranged, and a power supply extension line connected with the casing and provided with a plug. The power supply socket is characterized in that a concave limit opening, around which the power supply extension line can be wound, is arranged on the left side part and the right side part corresponding to the left part respectively. A lifting handle composed of a lifting handle part and a shaft fixed to the middle part at the lower part of the lifting handle part is further arranged on the casing. The shaft is moveably inserted and limited on the upper surface of the casing. The casing can rotate relative to the axial direction of the shaft. The power supply extension line can enclose the casing and wind around the limit opening, so as to fold and accommodate the power supply extension line. When the power supply extension line is needed, the operator can only take hold of the lifting handle and pull the power supply extension line horizontally while driving the casing to rotate by 360 DEG relative to the shaft without manually twisting relative to the casing.

The invention relates to the field of hybrid vehicles, in particular to a hybrid powertrain and a hybrid vehicle. The hybrid powertrain comprises a motor transmission module and an engine, wherein themotor transmission module comprises a motor and a transmission; the motor is selectively in transmission connection with an input shaft or an output shaft of the transmission through a multistage gear transmission mechanism; and the engine is transmission connection with the input shaft of the transmission through a clutch in the transmission. By adopting the technical solution, the novel hybridpowertrain disclosed by the invention integrates the motor and the transmission into one module, and the motor can be selectively in transmission connection with the input shaft or the output shaft ofthe transmission through the multistage gear transmission mechanism. Therefore, compared with a conventional powertrain structure, the hybrid powertrain disclosed by the invention does not change much, and the torque of the motor can change torque output modes through the selective transmission connection so as to increase the torque output modes of the motor.

The invention relates to a power supply socket which comprises a casing, on which one or more groups of socket aperture units are arranged, and a power supply extension line connected with the casing and provided with a plug. The power supply socket is characterized in that a concave limit opening, around which the power supply extension line can be wound, is arranged on the left side part and the right side part corresponding to the left part respectively. A lifting handle composed of a lifting handle part and a shaft fixed to the middle part at the lower part of the lifting handle part is further arranged on the casing. The shaft is moveably inserted and limited on the upper surface of the casing. The casing can rotate relative to the axial direction of the shaft. The power supply extension line can enclose the casing and wind around the limit opening, so as to fold and accommodate the power supply extension line. When the power supply extension line is needed, the operator can onlytake hold of the lifting handle and pull the power supply extension line horizontally while driving the casing to rotate by 360 DEG relative to the shaft without manually twisting relative to the casing.

The invention discloses a paver screed satisfying transverse vibration uniformity, comprising a combined type screed which is composed of a plurality of sections of screeds, wherein, vibrators are arranged on a plurality of sections of screeds; each vibrator comprises a partiality axis, a bearing arranged on the partiality axis and a bearing base fixed on the screed, wherein, the partiality axis is provided with a power driving mechanism connected with a power source; the nominal amplitudes of a plurality of sections of screeds are identical and are equal to a constant of A0, namely, Ai=mi*eI / Mi=A0=(sigma mi*ei) / sigma Mi, wherein, the mass of the partiality axis mi=Fi*Li*rho, a partiality distance ei=ai*D<2>i / (D<2>i-d<2>i), the section area of the partiality part of the partiality section of the partiality axis Fi=pi*(D<2>i-d<2>i) / 4, wherein, Li is the length of the partiality section of the partiality axis, rho is material density of the partiality axis, Di is cylinder diameter of the partiality section of the partiality axis, di is cylinder diameter of journal of the partiality axis and alpha is the space between the cylinder axis of the partiality section of the partiality axis and the cylinder axis of journal. The invention has the advantages of reasonable design, convenient improvement method, good improvement effect and reliable work performance and can effectively solve the problem of poor transverse vibration uniformity along screed width direction of paver in work.

The invention provides a three-dimensional interconnection structure and a preparation method thereof. A trapezoidal groove is formed on the front surface of a semiconductor substrate, and then at least one front metal wiring layer is arranged on the slope of the trapezoidal groove, and then the back surface of the semiconductor is ground to make the Each layer of the front metal wiring layer near the bottom of the trapezoidal groove on the slope of the trapezoidal groove is exposed, and then at least one back metal wiring layer is formed on the back of the semiconductor and under the exposed front metal wiring layer. The metal wiring layer on the front side of the semiconductor and the metal wiring layer on the back side of the semiconductor are electrically connected through the metal wiring layer on the trapezoidal groove. In the three-dimensional interconnection structure provided by the present invention, the front metal wiring layer located on the slope of the trapezoidal groove is equivalent to a transmission belt, which can realize the formation of interconnection lines with the same or similar impedance between the front surface of the semiconductor, the slope of the trapezoidal groove, and the back surface of the semiconductor. It can overcome the problem of large signal reflection caused by impedance mismatch.

The invention belongs to the field of cables, in particular a cold-resistant aluminum alloy cable. The cold-resistant aluminum alloy cable comprises an insulating layer-coated aluminum alloy conductor main body, a shielding layer coated on the outside of the aluminum alloy conductor main body and a filling layer filled in the gap between the aluminum alloy conductor main body and the shielding layer; the outside of the shielding layer is provided with an insulating outer layer, a shape of the cross section of the insulating outer layer rotating around a vertical shaft is drop-shaped, and a spiral steel wire rotating around the outside of the aluminum alloy conductor main body is further arranged in the shielding layer, the outside of the spiral steel wire is provided with an expansion connecting conductor parallel to the aluminum alloy conductor main body, and a section of expansion connecting conductor is arranged at regular screw pitches. The aluminum alloy cable of the technical scheme is simple in structure, the snow accumulation and freezing conditions on the cable surface can be reduced, and the cable further can resist the severe cold.

The invention provides a drainage system for a vehicle sunroof. The sunroof includes a frame arranged along the width direction of the vehicle, a sealing member arranged on the frame, and a guide rail matched with the frame. The drainage system includes a The drainage groove and water outlet on the frame, and the drainage channel provided on the guide rail, wherein the seal is arranged at the junction of the frame and the guide rail, and forms a temporary storage area for accumulated water, through The guide member guides the running water accumulated in the temporary water storage area to the drainage channel of the guide rail. With the drainage system according to the present invention, since the water accumulation position at the lowest point of the frame is changed to the water accumulation temporary storage area defined by the sealing member, and the flowing water in the accumulation water temporary storage area is guided to the drainage channel of the guide rail through the guide member , Effectively avoid water accumulation or seepage from the connection between the frame and guide rail into the interior of the compartment, and better improve driving comfort.

The invention relates to an anti-counterfeit mark structure, in particular to an anti-counterfeit approval certificate. The anti-counterfeit approval certificate comprises an approval certificate body, a fragile sticker is connected to the back side of the approval certificate body and glued to the surface of a coil, a spray portion is arranged on the front side of the approval certificate body, a transfer-preventive layer covers the front side of the approval certificate body and the spray portion, a working surface of the transfer-preventive layer is connected with No.2 fragile glue, the No.2 fragile glue is connected to the front side of the approval certificate body, and connection points where the No.2 fragile glue is connected with the approval certificate body are positioned around the spray portion. The anti-counterfeit approval certificate is transferred and reused difficultly.

The invention discloses a method for preparing strontium-rich activated carbon by the aid of hydrothermal processes. The method includes steps of a), pretreating activated carbon, to be more specific,placing the proportioned activated carbon in diluted edible hydrochloric acid solution, heating the proportioned activated carbon in the diluted edible hydrochloric acid solution, carrying out impurity removal cleaning, further carrying out suction filtration, repeatedly washing the activated carbon, washing off surface residual acid liquid, boiling the activated carbon by water, then repeatedlyrinsing the activated carbon until the pH (potential of hydrogen) value of the activated carbon is 6.5-8.5, placing the activated carbon in drying ovens and drying the activated carbon for standby application; b), impregnating and loading strontium salt, to be more specific, slowly adding the pretreated proportioned activated carbon into impregnation liquid with diffusing agents and coupling agents, impregnating and stirring the activated carbon for 10 min, then adding strontium salt solution into the impregnation liquid and uniformly mixing and stirring the strontium salt solution and the activated carbon with each other in the impregnation liquid; c), carrying out hydrothermal reaction procedures, to be more specific, placing impregnated activated carbon solution in hydrothermal reactionkettles, keeping the temperatures constant for 2-6 hours after the hydrothermal reaction temperatures are increased and reach 130-250 DEG C and the pressures of the reaction kettles reach approximately 1MPa, carrying out still standing and temperature reduction after reaction is completely carried out, carrying suction filtration and cleaning, washing off surface residual impregnation liquid, then placing reaction products in drying ovens, and drying the reaction products at the temperatures of 120-150 DEGC to obtain the impregnated-hydrothermal strontium-rich activated carbon.

The invention discloses a wide frequency range self-adaptive repetitive control method of an active power filter. Firstly, the phase-locked loop is used to track the voltage frequency signal of the power grid in real time, and the switching frequency and the real-time power grid frequency are calculated under the premise that the switching frequency remains unchanged. Finally, the integer part of the ratio is taken as the number of beats of a fundamental wave lag of the improved repetitive controller, and the fractional part of the ratio is used to form the delay link, which is approximated by the first-order inertial link. In this way, in the case of grid frequency fluctuations, it can be ensured that the resonant frequency of repeated control is consistent with the actual fundamental and harmonic frequencies of the grid, so that the compensation effect of the active power filter will not be reduced when the grid frequency fluctuates.

The invention discloses an inserted chassis diagonal-brace structure of a tower crane and belongs to the technical field of the tower crane. The diagonal-brace structure of the tower crane comprises a base section, a chassis section and a diagonal brace, wherein the bottom end of the base section is vertically and fixedly connected to a crossed beam; the bottom end of the chassis section is fixedly connected to the top surface of the base section; the diagonal brace is arranged to be inclined to the crossed beam, the bottom end of the diagonal brace is fixedly connected with the crossed beam, while the top end of the diagonal brace is fixedly connected with the chassis section, a double-lug plate with a U-shaped structure and fixedly connected with the diagonal brace is arranged at the top end of the diagonal brace, and the inner width dimension of the U-shaped structure of the double-lug plate is matched with the width dimension of a main chord; the top end of the diagonal brace is sleeved on the main chord of the chassis section through the double-lug plate, and the top end of the double-lug plate is fixedly connected with the main chord of the chassis section through a connecting piece. The chassis section is reduced in overall structure dimension and strong in transportation convenience, and simultaneously, the stress condition at the connection part is improved and the weld joint quality requirement is effectively reduced. The diagonal-brace structure of the tower crane is simple and is easy to manufacture and low in manufacturing cost.

The invention relates to a compound jet pump based on the combination of center jet flow and annular jet flow. The compound jet pump comprises a working water pipe, a center nozzle, an annular nozzle,a water suction tube, a suction-in chamber, a throat tube inlet section, a throat tube, a diffusing tube and a water outlet tube. The compound jet pump further comprises a center nozzle control valveand an annular nozzle control valve. The center nozzle is arranged at the center of the annular nozzle. The center jet flow and the annular jet flow are combined. The compound jet pump solves the problems that a single center jet pump or single annular jet pump is low in efficiency, and the properties can be turned to be poor after working condition change. Compared with a traditional center jetpump and annular jet pump which are mostly used at present, the compound jet pump is small in structural change, the required parts are not greatly increased and technological processing can be achieved easily. The working efficiency is high, the problems which cannot be achieved by the traditional single jet pump are solved, and thus the application prospects are broad.

The invention provides a drainage system for a vehicle sunroof. The sunroof comprises a frame arranged in the vehicle width direction, a seal disposed on the frame, and a guide rail cooperating with the frame; the drainage system comprises a drainage channel and a water outlet provided on the frame, and a drain channel arranged on the guide rail, wherein the seal member is arranged at the joint ofthe frame and the guide rail, and forms a stagnant water temporary storage area, and the flowing water stored in the stagnant water temporary storage area is guided to the drain channel of the guiderail by a guide member. Using a drainage system according to the invention, As that watER accumulating position of the low point of the frame is changed to a water accumulating temporary storage areadefine by the seal, and the running water in the water accumulating temporary storage area is guided to the drainage channel of the guide rail through a guide member, the running water is effectivelyprevented from accumulating or leaking into the interior of the train compartment from the joint of the frame and the guide rail, and the driving comfort is better improved.

The invention discloses a sliding rack slow-ascending type bread toaster. A frame and a sliding rack are arranged in a housing of the bread toaster; the frame is used for mounting a toasting element and a guiding member of the sliding rack; a slow ascending machine core is arranged at the tail end of the sliding rack; the bread toaster further comprises a sliced bread bracket; a rack is arranged at the tail end of the sliced bread bracket; and the rack is engaged with the slow ascending machine core through a tooth surface. According to the technical scheme, a motor does not need to be used, the original structure is hardly changed, the problem of flying of small bread due to large tension force of a spring of the sliced bread bracket is solved through the arrangement of the slow ascending machine core, and the bread toaster has the advantages of simple structure, safety and reliability.

The invention relates to a separator for lithium batteries and a preparation method thereof, belonging to the field of battery separators. The invention provides a separator for a lithium battery, which is a para-aramid nanofiber membrane, which is prepared by the following preparation method: first, a spinning aid is added to a para-aramid fiber solution to obtain a uniform spinning solution, and then the resulting spinning solution is made of para-aramid nanofiber membrane by electrospinning; wherein, the spinning aid is polyethylene oxide, polyvinylpyrrolidone or polyvinyl alcohol In one, the mass ratio of the spinning aid to the para-aramid fiber in the para-aramid fiber solution is: 10 parts by weight of the para-aramid fiber and 1-12 parts by weight of the spinning aid. The separator for lithium batteries obtained by the invention has excellent thermal stability and mechanical properties; on the premise of excellent electrochemical properties, the safety of lithium batteries is greatly improved.