21results about How to "Prevent reverse" patented technology

The invention relates to an innovative method for transversely assembling a PEM electrolytic cell and a matched device thereof, which are specially used for solving the problems of tedious steps, easiness in dislocation of parts, low assembling efficiency and the like in the traditional assembling process. According to the method, the assembly process is simplified, and the advanced viscose hot pressing technology and vulcanization bonding technology are adopted, so that firm connection among the anode frame, the membrane electrode and the cathode frame and stable combination of the bipolar plate and the membrane electrode assembly are ensured. Besides, the device comprises an assembling platform, a stacking device, an extruding and fixing device and an adhesive hot-pressing device, and the design of the devices ensures the accurate position and sequence of the parts in the assembling process, so that the problems of dislocation and reversing are avoided, and the assembling precision is remarkably improved. Through the improvements, the production efficiency and the product quality of the PEM electrolytic bath are greatly improved, the production cost is effectively reduced, the market competitiveness is enhanced, and the PEM electrolytic bath has important industrial application value.

This invention discloses a creep control method and device for a new energy heavy-duty truck, belonging to the field of new energy vehicle control technology. The method includes the following steps: in response to vehicle power-on, determining whether the vehicle is currently in a creep basic state, and if the doors are closed and the driver is in position, entering a creep waiting-to-recognize state; in the creep waiting-to-recognize state, if it is detected that the accelerator pedal is depressed beyond a preset opening degree and then released and returned to zero opening degree, then a creep power latch flag is set to an active state; when the creep power latch flag is active, the corresponding creep mode is activated according to the current vehicle gear information, the creep mode including a forward creep mode and a reverse creep mode; during creeping, creep torque is feedforward compensated according to the real-time slope value; when any one of the preset exit conditions is met, the creep mode is exited; wherein, if the met exit condition includes a creep basic state failure, the creep power latch flag is set to an inactive state. This invention improves the safety and driving smoothness of creep control under complex working conditions.

The utility model relates to the related technical field of animal feeding, in particular to an independently ventilated guinea pig cage for experiments, which comprises a cage body, an isolation plate is arranged on the cage body, a buckle is arranged outside the cage body, a cage cover is arranged on the cage body, a sealing mechanism is arranged in the cage cover, a conveying mechanism is arranged in the isolation plate, and a kettle is arranged outside the isolation plate. According to the independent ventilation cage, through the arrangement of the cage body, the isolation plate, the buckle, the cage cover, the sealing mechanism, the conveying mechanism, the kettle and the fixing plate, when ventilation is conducted on the cage, a ventilation pipe is inserted into a ventilation column firstly and then continues to be inserted, at the moment, a spring on the pressing column is compressed due to insertion of an air inlet pipe, an air inlet is exposed, and then clean air can be pumped into the cage; the filter screen can prevent reverse pollution, the column is pressed to return after the pipe is pulled out, polluted gas in the cage is prevented from escaping, the exhaust method is similar, but the filter screen of the exhaust valve needs to be taken out in advance, otherwise, the gas is blocked and cannot be exhausted, and therefore the sealing performance is guaranteed.

The utility model discloses a building floor structure paved by stone, and belongs to the technical field of marble and granite paving treatment. The building floor structure paved by the stones sequentially comprises a composite stone layer, a cement mortar layer, a cement mortar leveling layer, a fine aggregate concrete leveling layer, a neat cement mortar layer and a floor base layer from top to bottom, wherein the composite stone layer comprises at least two composite stone blocks, and each composite stone block sequentially comprises stone, an epoxy resin bonding layer and an anti-skid floor tile from top to bottom. According to the paving method provided by the utility model, endogenous alkali can be prevented, long-term stable use of the stone after paving is realized, and the problem that alkali efflorescence is easy to occur when the existing stone is used is solved.

The application provides a contactor, relates to the technical field of switches, and is used for reducing the possibility that the circuit board in the prior art cannot meet use requirements. The contactor comprises a base, a circuit board assembly and a plurality of conductive pieces, wherein the base has a containing cavity. The circuit board assembly is arranged in the containing cavity, and the circuit board assembly comprises a first circuit board and a second circuit board. One end of at least two conductive pieces is electrically connected with the first circuit board, and the other end of the at least two conductive pieces is electrically connected with the second circuit board. One end of the remaining at least two conductive pieces is electrically connected with the circuit board assembly, and the other end of the remaining at least two conductive pieces is electrically connected with the end part of a coil possessed by the contactor.

The utility model relates to a cooling device for hot and sour sauce production, which comprises a shell, a partition plate is arranged in the shell, a conveying pipe penetrates through the shell on the partition plate, a refrigerant pipe is wound on the conveying pipe, a refrigeration component is fixedly mounted below the partition plate, and the refrigeration component is respectively connected with two ends of the refrigerant pipe. According to the cooling device for production of the sour and hot sauce, the refrigerant pipe is wound on the conveying pipe for packaging the sour and hot sauce, the cooling device is assembled into a production line, the situation that the sour and hot sauce is poured into the cooling device in the production process is avoided, the pollution problem possibly generated in the pouring process is avoided, the device is simple, practicability is high, and meanwhile the production efficiency is improved.

An electric pump for an electric vehicle power thermal management system comprises an electric motor and an axially driven impeller thereof to drive a pump liquid in a volute chamber, a cylindrical cavity surrounding a motor housing, a cylindrical heater built in the cavity to heat the pump liquid, and an inner peripheral partition and an outer peripheral partition respectively arranged around the inner and outer peripheries of the heater, the cavity is divided into an inner peripheral flow channel and an outer peripheral flow channel respectively bypassing the inner and outer peripheries of the cylindrical heater for the pump liquid to pass through, the two flow channels are only switched once at one end of the cavity, which not only avoids repeated switching of several sections of spiral flow channels in previous designs, rapid changes in flow direction, uneven flow distribution, local high temperature and trapped gas problems, but also the spiral rise angle of the partition in the uppermost section of the cavity is less than 20°, which reduces the curvature radius of the liquid flow motion trajectory and increases the centrifugal acceleration to exceed the gravity acceleration, so that the liquid flow can climb more smoothly over the highest position of the cavity and flush away the gas in the flow channel.

The invention relates to the technical field of hydraulic transmission, and provides an integral type multi-way valve and a machining device.The integral type multi-way valve comprises an integral type valve body, a plurality of valve cavities are formed in the integral type valve body in an arrayed mode, the valve cavities are communicated through oil channels, a plurality of operating rods are installed on one side of the integral type valve body in an arrayed mode, and the operating rods are arranged on the other side of the integral type valve body. One end of the integral valve body is provided with an oil inlet communicated with a hydraulic pump, the other end of the integral valve body is provided with an oil return opening communicated with a hydraulic oil tank, and a plurality of sets of working connectors used for being connected with a hydraulic cylinder are arranged between the oil inlet and the oil return opening. A safety valve and an oil discharge valve assembly are oppositely arranged on the integral valve body and close to the oil inlet. The fixture has the characteristics of compact structure, light weight, convenience in clamping and high processing efficiency.

The application provides a grid type pipeline ventilation method suitable for downward drift filling stope, which comprises the following steps: carrying out grid type pipeline ventilation scheme design of the downward drift filling stope, constructing a one-layer one-step drift stope X, Y and Z three-way pipeline ventilation system, constructing a one-layer two-step drift stope X, Y and Z three-way pipeline ventilation system, and constructing a one-layer below drift stope Y and Z way pipeline ventilation system to form an overall grid type pipeline ventilation system. The application can effectively solve the problem that the downward drift stope has no independent return air channel and is difficult to form through air flow, guarantee the safety of stope operation, save engineering quantity and reduce cost; the local ventilator does not need to be moved multiple times, and the air flow can be prevented from reversing at the same time; the grid type pipeline ventilation system can return air in multiple ways, and the air resistance is small, the air speed is high, and the efficiency is high.

The utility model discloses an energy storage and new energy automobile connector with a fool-proof structure, the connector comprises a plug and a socket, the plug comprises a housing, a wiring terminal and a first fool-proof member; the wiring terminal is connected in the shell, and the first fool-proof piece and the shell are integrally arranged and extend out of the shell; the socket comprises a mounting sleeve, a pin and a second fool-proof piece; the contact pin is connected to the interior of the mounting sleeve, and the second fool-proof piece is connected to the interior of the contact pin; wherein the first fool-proof piece is divided into a cylindrical fool-proof piece and a clamping tooth fool-proof piece, the second fool-proof piece is divided into a circular hole fool-proof piece and a clamping groove fool-proof piece, and a through hole matched with the first fool-proof piece is formed in the second fool-proof piece; and the plug is detachably and electrically connected with the socket. According to the utility model, the first fool-proof member and the second fool-proof member cooperate with each other, so that misinsertion is avoided during use, the positive and negative electrodes of the energy storage connector can be effectively distinguished, and the safety is improved.

The utility model discloses an exhaust aftertreatment system cooling liquid pipeline assembly which comprises a warm air water inlet steel pipe and a water inlet main pipeline, one end of the water inlet main pipeline is communicated with one end of the warm air water inlet steel pipe, and the other end of the water inlet main pipeline is communicated with a first port of a water inlet tee joint. A second port of the water inlet tee joint is communicated with one end of a urea nozzle cooling water inlet pipe, the other end of the urea nozzle cooling water inlet pipe is communicated with a urea nozzle of the exhaust postprocessor, and the urea nozzle is communicated with one end of a urea nozzle cooling water return pipe at the same time. According to the exhaust aftertreatment system cooling liquid pipeline assembly, the urea box heating water pipe and the urea nozzle cooling water pipe are integrated, the arrangement space of a whole vehicle is saved, and modularization of the whole vehicle is facilitated. Offline split charging of a urea box heating water pipe and a urea box can be achieved, off-line split charging of a urea nozzle cooling water pipe and a postprocessor is achieved, the production takt of a final assembly line is saved, and the assembly efficiency is improved.

The utility model relates to the technical field of air purification, and discloses a distributed self-adaptive nanometer water ion purification and sterilization device which comprises a filter box, a mounting frame is mounted on the side portion of the filter box, a rotating wheel is fixedly mounted at the bottom of the mounting frame and makes contact with the ground, a sliding groove is formed in the side portion of the mounting frame, and the rotating wheel is in contact with the sliding groove. A damping pipe is arranged in the middle of the sliding groove, a limiting groove is formed in the middle of the filter box, a sliding block is slidably connected to the middle of the limiting groove, a sliding rod is fixedly connected to the side portion of the sliding block, and a spring is connected to the side portion of the sliding rod in a sleeving mode. Through arrangement of a limiting groove, a sliding block and a limiting plate, when the filter box is taken out, a spring can be released and the filter box is popped out by utilizing compression force applied to the spring during installation of the filter box and when a protective door is opened, and through arrangement of a damping pipe, when the filter box is popped out, the popping speed of the filter box can be limited through the damping pipe.

The invention discloses a multi-bin magnet automatic feeding device, including a feeding platform, a support frame is respectively provided on the left and right sides of the bottom surface of the feeding platform, a through hole is provided in the middle of the feeding platform and penetrates the feeding platform in the up-down direction, a servo motor is installed on the right side of the bottom surface of the feeding platform, a group of feeding mechanisms are respectively fixed on the front side, the left side, the right side and the rear side of the turntable in the vertical direction, a picking mechanism is installed on the left side of the feeding platform, the picking mechanism slides left and right along the feeding platform and a lack of material detection mechanism is installed on the left side of the top surface of the picking mechanism, a polarity detection mechanism and an auxiliary picking mechanism are installed in the through hole, the top of the polarity detection mechanism is fixed on the right side of the picking mechanism, the auxiliary picking mechanism is located on the left side of the polarity detection mechanism and the top of the auxiliary picking mechanism is fixed on the lower side of the middle part of the picking mechanism. The invention has the advantages of stable feeding and high production efficiency.

The invention discloses a rana japonica oil food capable of nourishing yin and moistening lung and a preparation method of the rana japonica oil food. The rana japonica oil food comprises radix asparagi, rana japonica oil, red ginseng, maltodextrin, a loquat leaf extract, a tussilago farfara extract, adenophora stricta and radix stemonae. The preparation method of the oviductus ranae food comprises the following steps: respectively carrying out superfine grinding on the oviductus ranae freeze-dried powder, the radix asparagi, the red ginseng, the maltodextrin, the loquat leaf extract, the tussilago farfara extract, the adenophora stricta and the radix stemonae, and uniformly mixing in parts by mass to obtain a compound; the compound is used as powder to be packaged into a finished product, or the compound is prepared into tablets, ointment, pills or capsules to be packaged into a finished product. The oviductus ranae food is rich in various nutritional ingredients, has the effects of nourishing yin, moisturizing the lung, tonifying qi and strengthening the middle warmer, and can greatly improve the immunity and resistance of a user and improve the symptom of low immunity caused by lung weakness.

Aiming at the problem of unstable film transfer in the prior art, the invention provides the film transfer clamp which has a high-hardness structure and can fix the sponge, the ceramic plate is used for replacing a traditional plastic plate, so that the film transfer clamp has very high rigidity and thermal conductivity, and the whole clamp plate is ensured not to be distorted; due to the design that the sponge is directly adhered to the ceramic plate, the operation is simplified, and more stable pressure is provided for a transfer film compound; the plastic shell enables the ceramic plate to be buffered and protected, and the color of the plastic shell prevents the film transfer clamp from being reversely placed; large holes and small holes are uniformly formed in the ceramic plate at intervals, so that the electric field intensity is more uniform, and the membrane transfer efficiency is higher; the annular magnet design at the top of the plastic shell provides a stable supporting structure for the ceramic plate; meanwhile, the annular magnet serves as a switch for installing and removing the ceramic plate into and out of the plastic shell, and the left end and the right end of the annular magnet are dispersedly designed, so that the film rotating clamp is easy to open and close.

The utility model discloses a screw hole drilling jig which comprises a base and a cover plate. The base comprises a base outer frame, and the base outer frame is provided with an inner cavity and a protruding part. The base further comprises a plurality of partition plates located in the inner cavity, the two ends of each partition plate and the base outer frame are integrally formed, a plurality of limiting structures are formed between the adjacent partition plates or between the partition plates and the base outer frame in a partition mode, each limiting structure is provided with a step part, a groove allowing a product to be drilled to be embedded in is formed in each step part, and the grooves are communicated with the inner cavity. The cover plate comprises a cover plate body and a plurality of rigid hole columns fixedly connected with the cover plate body, and each rigid hole column is completely embedded in the cover plate body. The screw hole drilling jig disclosed by the utility model has the beneficial effects that the rigid hole column is completely or partially embedded in the cover plate body, so that a drill bit can be accurately aligned to the position, needing a screw hole, of a product to be drilled through the rigid hole column, deviation is prevented, and abnormal wear of the drill bit is avoided.

The utility model discloses a gear shaft mistake-proof positioning tool and gear shaft machining equipment. The gear shaft mistake-proofing positioning tool comprises a positioning block, the positioning block is provided with a mistake-proofing groove, the groove milling end of the gear shaft is inserted into the mistake-proofing groove, the groove milling end is provided with an identification flat face, and the inner side face of the mistake-proofing groove is attached to the identification flat face. A positioning shaft is further arranged at the end, facing the gear shaft, of the positioning block, a positioning hole is formed in the groove milling end of the gear shaft, and the positioning shaft is inserted into the positioning hole. The positioning shaft is arranged on the positioning block, so that the positioning shaft can penetrate into the positioning hole of the gear shaft, and the gear shaft can rotate relative to the positioning block. When the identification flat face of the gear shaft rotates to correspond to the inner side face of the mistake-proofing groove, the gear shaft can be inserted into the mistake-proofing groove, the inner side face of the mistake-proofing groove can abut against the identification flat face, positioning of the gear shaft is achieved, follow-up machining of the gear shaft is facilitated, the gear shaft mistake-proofing positioning tool can prevent the gear shaft from being placed reversely, and the yield of the gear shaft can be increased.

The application relates to the technical field of circuit control, in particular to a control circuit and method of an interleaved parallel three-phase rectifier and a charging pile. The control circuit comprises a signal processing module, a phase-locked loop, a loop control module, a comparator module and a pulse generation module. The comparator module is used for outputting six zero-crossing signals based on six inductance currents of a main phase and a slave phase and built-in programmable thresholds. The pulse generation module is used for generating main-slave staggered carriers with a phase difference of 180 degrees based on the main phase zero-crossing signal, and generating and outputting 12 driving pulses based on the main-slave staggered carriers, a three-phase modulation signal, an angle and the six zero-crossing signals. The conduction of the driving pulses is triggered by the zero-crossing signal to clear the carrier counter, and the turn-off is generated when the carrier count value reaches the turn-off threshold corresponding to the three-phase modulation signal. In conclusion, the technical scheme provided by the application can realize CRM control of the interleaved parallel three-phase rectifier and improve the current control stability.

The invention relates to a condensation pipe, a condensation reflux reaction device and a method for feeding materials above the condensation pipe. The condensation pipe comprises an outer pipe and an inner pipe, the inner pipe penetrates through the outer pipe, the inner pipe is a Tesla valve pipeline, and the downstream direction of the Tesla valve pipeline is opposite to the steam flowing direction of the condensation pipe; the outer pipe is provided with a liquid inlet and a liquid outlet, and a condensing agent channel is formed in the space between the outer pipe and the inner pipe. Through the reversely arranged Tesla valve pipeline and the condensation pipe, the condensation effect can be ensured, liquid splashing or backflow solvent spewing after feeding is prevented, and meanwhile the problem of inaccurate feeding caused by gasification-condensation circulation of part of raw materials in the condensation pipe due to heat exchange in the feeding process of the condensation pipe is solved. By means of the condensation pipe, the feeding operation in the backflow experiment process can be simplified, and safety and accuracy can be both considered when feeding is conducted above the condensation pipe.

The invention provides an improved instruction distribution calculation method and system considering large change of wind and light resources in a frequency modulation process, electronic equipment and a medium, and belongs to the technical field of power system frequency stability control, and the method comprises the following steps: S1, building a control architecture and a classical instruction distribution calculation method applied to a wind and light storage new energy station; s2, establishing a frequency modulation instruction distribution calculation method considering the great change of wind and light resources in the frequency modulation process; and S3, carrying out dynamic response characteristic modeling on the wind power unit, the photovoltaic unit and the energy storage unit, converting into a discretization model in a time domain according to a finite difference method, and carrying out power output on the wind power unit, the photovoltaic unit and the energy storage unit in combination with the frequency modulation instruction distribution calculation method in the step S2. According to the method, correct calculation and allocation of frequency modulation instructions under different wind and light resources can be realized, and the frequency supporting capability of a new energy station is improved.

The utility model discloses a telescopic arm type concrete laser leveling machine, and belongs to the technical field of laser leveling machines. A telescopic arm type concrete laser leveling machine comprises a vehicle body, a concrete tank is arranged at the rear end of the vehicle body, a control system and a telescopic arm are arranged at the front end of the vehicle body, a lifting rod is arranged at the working end of the telescopic arm, a leveling mechanism is arranged at the bottom end of the lifting rod and comprises a scraper blade and a filling device, and a conveying pipe is arranged between the concrete tank and the filling device. The deep scraping device comprises a fixed seat fixed on the filling device, a scraping plate is arranged in the fixed seat, a hydraulic cylinder used for pushing the scraping plate downwards is arranged at the top of the fixed seat, the control system comprises a laser transmitter and a control box, and the control box is electrically connected with the telescopic arm, the lifting rod, the leveling mechanism, the filling device and the hydraulic cylinder. The leveling machine has the advantages that a higher concrete pile can be leveled at one time, and the working efficiency of the leveling machine is improved.