119 results about "Continuous injection" patented technology

The invention discloses a waterproof and anti-falling infrared wireless controller and a production process thereof, and relates to the technical field of injection molds, a supporting column is arranged in an injection molding device main body, a servo motor, a rotating column, a connecting plate and an overturning template are mounted in the supporting column, an injection molding opening is formed in one side of the overturning template, and the rotating column is arranged in the supporting column; lower hydraulic cylinders are installed on the two sides in the injection molding device body, lower mold plates are arranged at the upper ends of the lower hydraulic cylinders, upper hydraulic cylinders are installed on the upper inner wall of the injection molding device body, upper mold plates are arranged at the lower ends of the upper hydraulic cylinders, air pumps are installed in the bottom ends of the supporting columns, the two ends of the air pumps communicate with air pipes, and one ends of the air pipes communicate with negative pressure plates. A plurality of negative pressure holes are formed in the surface of the negative pressure plate, a mounting plate is rotationally connected to one side of the lower end of the negative pressure plate, and a first hydraulic cylinder is mounted at the lower end of the mounting plate. According to the injection mold, injection molding and discharging work are separated, the working efficiency of continuous injection molding is improved, meanwhile, two times of injection molding work can be completed without disassembling the mold plate, and convenience is improved.

The utility model relates to the technical field of fuel cell bipolar plate preparation, and provides a forming device and a fuel cell bipolar plate sealing structure forming system. The forming device disclosed by the utility model is used for forming the sealing rubber strip on the bipolar plate for the fuel cell, and comprises a rubber injection machine, a cold runner module and a forming mold which are connected in sequence, wherein a rubber runner and a cooling liquid channel for cooling the cold runner module are arranged in the cold runner module, one end of the rubber runner is connected with a rubber injection machine, the other end of the rubber runner is connected with an injection nozzle, and the cooling liquid channel is connected with a mold temperature controller; the forming mold can define a cavity for forming the sealing rubber strip together with the bipolar plate during mold closing, and the cavity is communicated with the injection nozzle. According to the utility model, the glue material can be prevented from being solidified in the runner, the continuous injection operation can be realized, and the production efficiency can be improved.

The invention discloses a battery cover machining technology. The battery cover machining technology comprises the following steps that S1, a hardware stamping die is adopted for conducting continuous stamping on a hardware material to obtain a hardware material strip; s2, the hardware material belt is cleaned; s3, the hardware material belt is moved to an injection molding machine to be subjected to continuous injection molding; s4, each hardware injection molding workpiece is detected, and the positions of good products and defective products are recorded and fed back according to the detection result of each hardware injection molding workpiece; s5, the non-defective hardware injection molding workpieces on the hardware plastic material belt are subjected to continuous punching according to feedback of the detection mechanism; s6, the collected good hardware injection molding workpieces are cleaned; and S7, the cleaned good hardware injection molding workpiece is packaged. Thus, batch production and detection of products are achieved, traditional single manufacturing and detection of each hardware are omitted, meanwhile, the hardware is cleaned after hardware punch forming, oil stains on the surface of the hardware are avoided, subsequent injection molding operation is facilitated, and the yield of the products is increased.

The invention discloses a metal powder continuous injection molding machine, and relates to the technical field of metal powder molding, the metal powder continuous injection molding machine comprises a placing plate, first aluminum profile frames are fixedly arranged at the corners of the upper surface of the placing plate, and a supporting panel is fixedly arranged at the top ends of the first aluminum profile frames; a second aluminum profile frame is fixedly arranged on the edge side of the upper surface of the supporting panel, a flow guide box is fixedly arranged in an inner cavity of the supporting panel, a feeding port penetrates through the top of the outer surface of the flow guide box, and a stable installation and operation platform is provided for the whole injection molding machine through the arrangement of the containing plate and used for bearing a mold below and guaranteeing horizontal positioning of the mold. By arranging the first aluminum profile frame and the second aluminum profile frame, a modularized, light-weight and high-rigidity main body supporting frame of equipment is jointly formed, and the first aluminum profile frame bears main vertical loads. And the effect of preventing the metal powder from being blocked in the injection process is achieved.

The utility model discloses an electric automobile motor iron core with low magnetic flux loss, which relates to the technical field of motor accessories and comprises an iron core main body, a plurality of groups of first punching sheets, a plurality of groups of second punching sheets and a plurality of groups of sealing caps. A plurality of groups of first injection grooves are formed in the outer walls of the two sides of the first punching sheet around the axis in an equal-angle array mode. According to the utility model, a plurality of groups of first punching sheets and second punching sheets are stacked by using a positioning tool, a plurality of groups of positioning blocks are inserted into positioning holes for limiting and fixing, after the iron core main body is stacked, the first through holes are communicated to form a through cavity, and the inner wall of the first through hole at one side is connected with a sealing cap; a binder is injected into the first injection groove and the second injection groove from the other side through the first through hole by using high-pressure glue injection equipment, the binder expands the punching sheets on the two sides due to continuous glue injection, injection is stopped after corners overflow, the redundant binder is scraped off, the first through hole and the first through hole on the other side are sealed by using a sealing cap, rapid bonding of the punching sheets is completed, and the coating efficiency is improved.

The application discloses a kind of injection valve control method, equipment and vehicle, it is related to engine field, can determine out injection valve execution strategy according to the current operating condition of engine.According to injection valve execution strategy, determine the number of first injection valve that needs to start injection in the working cycle of engine, and the number of second injection valve that does not need to start injection.Further, the injection mode of the first injection valve that needs to start injection is determined as: continuous injection mode or partial injection mode.Based on this, select the first number of first injection valve from all injection valve, and control each first injection valve to execute injection operation according to corresponding injection mode.Thereby, according to the different fuel demand of engine under different working conditions, the number of full-time continuous injection, partial continuous injection and non-injection injection valve in working cycle is adjusted, to ensure the uniformity of fuel injection in cylinder, improve the mixing uniformity of fuel and air.

The utility model relates to the technical field of gas conveying devices, in particular to a serial continuous injection conveying device. According to the technical scheme, the feeding device comprises a sending bin pump and a feeding machine connected to the output end of the sending bin pump, the output end of the feeding machine is connected with a material conveying pipe, a feeding machine motor is arranged on one side of the feeding machine, the feeding device further comprises a discharging bin pump connected to the input end of the sending bin pump, and a weighing sensor is arranged on the discharging bin pump; the output end of the gas compressor is connected with a gas pressure conveying pipe, and the gas pressure conveying pipe is connected with the material conveying pipe. The feeding bin pump is arranged at the input end of the sending bin pump, so that materials can be quantitatively supplemented into the sending bin pump according to requirements; by arranging the first branch pipe, the air pressure in the sending bin pump can be kept the same as the air pressure in the material conveying pipe, materials are prevented from flowing back into the feeding machine under the pneumatic action of the pneumatic conveying pipe, and the abrasion condition of the feeding machine is avoided; continuous conveying can be achieved, and the sending speed can be controlled through the feeding machine.

The invention discloses an egg continuous injection device with a positioning clamping groove, belongs to the technical field of egg processing equipment, and solves the problems of low injection precision, incapability of continuous operation, high egg breakage rate and poor injector adaptability of the existing device. The device comprises a conveying assembly, an injection assembly, a feeding assembly and a discharging assembly, the conveying assembly comprises a conveying belt body and an egg groove with an arc-shaped egg support, the injection assembly is provided with an upper clamping groove positioning injector and a lower clamping groove positioning injector, a sliding table is provided with a lower sliding groove, and a lower installation block is in sliding fit with the lower sliding groove to achieve vertical fine adjustment. The feeding assembly and the discharging assembly are communicated with the conveying belt body through inclined sliding ways. According to the egg injection device, continuous and automatic egg injection is achieved, positioning is accurate, the egg body breakage rate is low, the injector adaptability is high, replacement is convenient and fast, and the egg injection device is suitable for batch injection of various eggs.

The invention relates to the field of part injection molding, in particular to an injection molding device for a copper heat dissipation part with a plurality of long and thin holes and a manufacturing method, and solves the problems of splitting injection molding parts and realizing continuous injection molding of the parts. The injection molding device comprises a base, a fixed box is mounted on the base, and a conveying belt is arranged in the fixed box; and the injection molding part is composed of an injection molding frame and an injection molding box, and the injection molding box slides on the injection molding frame. According to the device, automatic injection molding of metal powder can be achieved, meanwhile, automatic continuous manufacturing is achieved under the action of the conveying belt, when complex parts are split for injection molding, a binder is removed after blanks are formed, the blanks are sintered, the blanks are highly compact to form metal products, and integrated sintering is achieved; the phenomenon that bubbles are generated in the mold during injection molding can be avoided, and the phenomena that the mold cannot be used and is damaged after molding are prevented.

The invention provides a DPF active regeneration control method, system and equipment based on urea injection time sequence optimization and a medium, and belongs to the technical field of automobile control. The method comprises the steps that S1, whether DPF active regeneration needs to be started or not is judged, and when it is judged that DPF active regeneration needs to be started, the exhaust temperature is increased to the target regeneration temperature range in a fuel oil post-injection mode; s2, after the exhaust temperature is increased to the target regeneration temperature range, a urea injection mode is controlled to be switched from a preset continuous injection mode to a preset intermittent pulse injection mode; and S3, when the active regeneration of the DPF is finished and the exhaust temperature is reduced to be below a normal temperature threshold value, the urea injection mode is switched back to a preset continuous injection mode from a preset intermittent pulse injection mode. The problem of urea crystallization under a high-temperature regeneration condition is effectively avoided.

This utility model relates to a multifunctional antistatic agent feeding device capable of continuous injection and precise metering, comprising: an antistatic agent dilution tank for receiving and mixing a high-viscosity first antistatic agent and a diluent to form a first antistatic agent diluted solution; a nitrogen generator connected to the antistatic agent dilution tank for bubbling and deoxygenating the first antistatic agent diluted solution; an antistatic agent feeding tank connected to the antistatic agent dilution tank for receiving the deoxygenated first antistatic agent diluted solution or directly receiving a second antistatic agent; a stirrer disposed within the antistatic agent feeding tank for maintaining solution homogeneity; and a metering pump connected to the antistatic agent feeding tank for precisely metering and delivering the antistatic agent solution to the reactor. Compared with the prior art, this utility model has advantages such as achieving precise metering and continuous feeding; multifunctional compatibility, adapting to antistatic agents with different properties; and improved reaction safety.

The invention discloses a heat balance injection molding method based on induction heating-traditional temperature control fusion, and belongs to the technical field of plastic processing. In order to solve the problems that in the heating process of a traditional injection mold, heat lag is obvious, energy consumption waste is serious, and temperature field control of a single heating mode is insufficient, the technology achieves dynamic stability of a mold temperature field through the cooperation mode of mold temperature controller basic temperature control and temperature rise provided through induction heating in combination with dynamic heat balance in a continuous injection molding period. The method comprises the specific steps of mold basic temperature preheating, induction heating parameter adaptation, continuous injection molding heat balance maintenance and process parameter dynamic optimization. The method has the advantages of feasibility and energy conservation, and a new scheme is provided for consumption reduction in the injection molding industry.

The invention discloses a center fixed mold surrounding type multi-station continuous injection molding system and a control method thereof, and belongs to the technical field of injection molding equipment. The system comprises: a base; the annular guide rail is mounted above the machine base; the fixed mold unit is fixedly arranged in the center of the annular guide rail; the at least three movable mold units are arranged on the annular guide rail in a sliding manner and are distributed at intervals in the circumferential direction; the rotary driving mechanism is used for driving the movable mold unit to rotate in a stepping manner; the positioning and locking mechanism is used for locking the movable mold unit located at the forming station; the manipulator is mounted on the side of the machine base; and the station control unit is used for controlling the linkage time sequence of each component. By means of the layout that the fixed mold is fixed to the center and the movable mold rotates around the center, parallel operation of injection molding and auxiliary working procedures such as part taking and part embedding is achieved, the auxiliary waiting time is eliminated, and the equipment utilization rate is greatly increased; and meanwhile, the device has the advantages of small rotation inertia, simple butt joint, convenience in maintenance and the like.

The invention relates to an injector handle, a veterinary electric injector and a continuous injection method. The syringe handle comprises a holding straight pipe, a switch base, a communicating piece and a disposable needle. The overall shape of the syringe handle is like a dagger, and puncture force application is facilitated; fingers can be put on the button switch in the puncture process; when the syringe handle is subjected to resistance of livestock skin during puncturing, the button switch can be pressed down in time, so that the liquid medicine is started to be conveyed; the veterinary electric injector further comprises a front shell part, a rear shell part, a hose and a first connecting screw. The electric injector for livestock can realize continuous and accurate liquid medicine injection, and is suitable for large-scale popularization in farms; the continuous injection method is easy to operate, puncture and liquid medicine injection are completed at a time, and the injection efficiency is improved.

The application discloses a kind of integrated injection device suitable for double-lumen PICC catheter tube, it is related to syringe technical field, to solve the technical problem of single function of injection device, including double-lumen injection shell, two injection heads, moving assembly, double-piston assembly, transmission mechanism and gear set.The application is designed transmission mechanism and gear set structure, so that when the clamping block is connected with the rotating hole, the gear ring can rotate relative to the cylinder, the moving assembly makes the gear ring rotate relative to the cylinder, so that the first gear C is driven by gear A intermittent rotation, so that double-piston assembly intermittent movement realizes pulse injection, when the clamping block is connected with the rotating ring, moving assembly, so that the gear ring and cylinder rotate simultaneously, so as to realize continuous injection, simple operation can realize two injection modes, solve the technical problem of single function of current injection device.

The application relates to the technical field of injection molding molds, and particularly discloses an injection molding mold for manufacturing a hair dryer shell, which comprises a base, the upper surface of the base is symmetrically fixedly connected with sliding rods. When raw materials enter the cover plate, the raw materials first exist on the extrusion plate. With the increasing input of the raw materials, the extrusion force borne by the extrusion plate increases, that is, the extrusion plate starts to move downwards along the feeding pipe, finally makes the intermittent holes on the feeding pipe communicate with the top cavity of the cover plate, thereby inputting the raw materials into the lower mold module through the intermittent holes, and when the input is completed, the extrusion plate loses the extrusion force and is reset under the action of the elastic force, thereby moving upwards, that is, making the bottom cavity of the extrusion plate in a negative pressure state, thereby generating a reverse suction force on the feeding pipe, that is, automatically cleaning the feeding pipe after the injection molding is completed, avoiding the problem that the feeding pipe is blocked by a large amount of raw materials accumulated in the continuous injection molding process, and also ensuring the cleaning of the lower mold module, and greatly improving the use convenience.

The application discloses a metal powder continuous injection molding machine, and relates to the technical field of metal powder molding, which comprises a placing plate, first aluminum profile frames are fixedly arranged at the corners of the upper surface of the placing plate, a support panel is fixedly arranged at the top of the first aluminum profile frame, second aluminum profile frames are fixedly arranged at the side of the upper surface of the support panel, a flow guide box is fixedly arranged in the inner cavity of the support panel, and a feeding port penetrates through the top of the outer surface of the flow guide box. The placing plate is arranged to provide a stable mounting and operation platform for the whole injection molding machine, and is used for bearing the lower mold and ensuring horizontal positioning. The first aluminum profile frames and the second aluminum profile frames are arranged to jointly form a modular, lightweight and high-rigidity main support frame of the equipment, and the first aluminum profile frames bear the main vertical load. The effect of preventing internal blockage during metal powder injection is achieved.

The invention discloses an integrated injection welding device and method for an IV-type hydrogen storage cylinder liner, the device comprises a forming module, an injection molding module, a welding module and a moving module, the forming module comprises two forming mechanisms, each forming mechanism comprises a female mold and a male mold which are matched with each other, and the female mold and the male mold are matched to form a hollow cavity; the injection molding module comprises two injection molding mechanisms, the two injection molding mechanisms are used for injecting macromolecular injection molding materials into the two cavities correspondingly to obtain two symmetrical half liner structures, and welding surfaces are arranged at the ends, close to each other, of the two half liner structures; the welding module is used for heating a welding surface; the moving module comprises a first moving mechanism and a second moving mechanism, the first moving mechanism is used for driving the two male dies to be close to or far away from the two female dies respectively, and the second moving mechanism is used for driving the two female dies to move towards or away from each other. According to the method, the injection welding step is continuously carried out, so that the problems of insufficient weld strength, low production efficiency, material waste and non-uniform size caused by a distribution process are avoided.

The invention discloses an upper injection mold, and relates to the technical field of mold equipment. Comprising an upper mold plate, a feeding port is formed in the top of the upper mold plate, at least two feeding hot runners are formed in the upper mold plate, a cooling cavity is formed in the position, between the feeding hot runners, of the upper mold plate, composite refrigerating fluid is contained in the cooling cavity, the bottoms of the feeding hot runners are communicated with branch runners, and the branch runners are communicated with the upper mold plate. The two sides of the bottom of the sub-runner are respectively provided with a fixed mold insert, the bottom of the sub-runner is communicated with a central main runner, the two sides of the central main runner are provided with parting exhaust surfaces, the two sides of the bottom of the central main runner are communicated with sprues, and a central cooling well is arranged between the sprues. Therefore, the problems that the product size is unstable and the forming consistency is poor due to uncontrollable filling temperature fluctuation in the injection molding process of the mold are solved, and the capacity of maintaining a stable temperature field and maintaining the forming precision of the product under the continuous injection molding condition of the mold is improved.

The invention relates to a molded part guiding and separating device of injection molding equipment, and belongs to the technical field of molded part separation of the injection molding equipment. The formed part guiding and separating device of the injection molding equipment comprises an injection molding machine, a plurality of ejector pins and a movable mold, the ejector pins are all arranged in the injection molding machine and located on one side of the movable mold, and the movable mold is installed in the injection molding machine in a sliding mode; the demolding and separating mechanism comprises a moving seat, a demolding assembly and a separating assembly; the multiple spring rods are extruded by the demolding assembly under the triggering of the return stroke of the movable seat, so that the multiple ejector pins synchronously eject out the formed part and damage the attachment state between the formed part and the ejector pins, and the situations that the formed part is hung on the ejector pins and is not prone to disengagement are reduced; the separating assembly moves downwards and conducts guiding and auxiliary stripping on the formed part, so that retention of the formed part is reduced, and the device is suitable for stable operation under the continuous injection molding production working condition.

The invention relates to a nuclear facility ventilation system mechanical leakage detection method based on inert tracer gas. According to the method, sulfur hexafluoride or other inert tracer gas is selected, a pulse injection method or a continuous injection method is adopted, the tracer gas is injected into the upstream of a ventilation system and mixed with working condition gas, sampling ports are formed in the upstream and the downstream, and the concentration of the tracer gas is continuously measured through a gas chromatograph, a photoacoustic spectrometer or an online chromatograph. Upstream and downstream concentration-time curves are obtained. Whether mechanical leakage exists or not is qualitatively judged through the curve form, then the mechanical leakage rate is calculated based on the upstream injection amount and the downstream detection amount, the mechanical leakage rate is compared with the preset leakage rate range, and whether the requirement is met or not and the leakage degree are given. The method is safe in tracer gas, small in influence on adsorption performance, visual and reliable in detection result, and suitable for mechanical leakage detection of a nuclear power plant iodine adsorber and other nuclear facility ventilation systems.

The invention discloses a float glass endoscopic monitoring cooling device and a using method, and relates to the technical field of endoscopic monitoring, the float glass endoscopic monitoring cooling device comprises an endoscopic assembly and a transmission piece, the transmission piece comprises an outer sleeve, a middle sleeve and an inner sleeve which are sequentially distributed from outside to inside, a hollow connecting rod is arranged in the inner sleeve, one end of the outer sleeve is provided with an integrated piece, and the integrated piece is connected with the transmission piece. And an injection piece is arranged on the integrated piece. Through the arrangement of the transmission part, the monitoring part and the balance part, the multi-layer design of the transmission part can be utilized to be matched with the injection part to complete the gas-liquid layered design, the circulating liquid cooling is ensured, and the continuous injection is performed by utilizing gas transmission, so that the temperature near the camera is well controlled by utilizing water cooling, and the safety of the camera is improved. And meanwhile, the design of uniform blowing can effectively prevent fog shadow and thermal deformation of a lens opening caused by high temperature, guarantee the definition of a monitoring picture, and prevent dust and impurities in the tin bath from being attached through gas flow.

This invention relates to a method for continuous injection path planning for multiple piglets, which solves the technical problem of how to achieve rapid and continuous injection of vaccines into piglets using a robotic system, thereby improving operational efficiency, reducing the labor intensity of operators, and lowering labor costs. The method uses machine vision to obtain N injection points for multiple clamped and restrained piglets, sorts these N injection points to generate an injection sequence, and places the injection point with the shortest movement time (greater than T) of the veterinary needleless injector at the beginning of the injection sequence, while placing those with longer movement times at the end. This invention has wide applications in the field of swine disease prevention and control technology.

The invention discloses an automatic continuous injector which comprises a shell, a piston connected to the interior of the shell through a spring, a compressed air supply device connected to the tail end of the shell through a hose, a liquid storage tank fixedly connected to the front end of the piston, a needle fixedly connected to the front end of the liquid storage tank, and a peristaltic pump connected to the side wall of the liquid storage tank through a hose. A disinfection device is arranged on the outer side of the needle head and fixed to the shell. The syringe needle disinfection device can overcome the defects in the prior art and achieve convenient and efficient disinfection operation on the syringe needle.

The utility model relates to the field of defoaming devices, in particular to a corrosion-resistant bubble eliminator which comprises a tank body, a liquid inlet and an exhaust port are formed in the side wall of the tank body, the exhaust port is higher than the liquid inlet and located above the liquid level in the tank body, a bubble separation pipe is further fixedly installed in the tank body and comprises a vertical part extending vertically, and the vertical part is connected with the exhaust port. The vertical part is immersed below the liquid level of the tank body, the upper end of the vertical part is connected with a horizontal part which extends transversely, and one end of the horizontal part extends to the outer side of the tank body; a pricking needle mechanism for pricking bubbles is also arranged in the tank body; a gas-liquid mixed material is injected into the tank body through the liquid inlet, after the liquid level of the liquid material in the tank body completely submerges the height of the bubble separation pipe, the liquid outlet adjusting valve on the horizontal part is opened, the liquid material continuously overflows from the bubble separation pipe along with continuous injection of the gas-liquid mixed material in the liquid inlet, and bubbles are continuously eliminated.

This invention relates to the field of radiodiagnostic technology, specifically to a quantitative injection device for radiopharmaceuticals in nuclear medicine. The device includes an injection system, a waste liquid chamber at the bottom of the system, a waste liquid box within the waste liquid chamber, and a partition within the waste liquid box dividing the interior of the waste liquid box into several waste liquid tanks. Each waste liquid tank has a drive chamber and a recovery chamber arranged from top to bottom. Each recovery chamber contains a recovery component for collecting waste liquid generated during injection. Each drive chamber contains a drive component, which is used to seal and collect the waste liquid in one set of recovery components when the collection reaches its upper limit, and then switch to another set of recovery components to continue collecting waste liquid. A valve assembly is located on the top wall of the waste liquid chamber. This invention enables automatic switching and collection of waste liquid and simultaneous recovery of contaminated tubing, and achieves zero-contact replacement using a detachable waste liquid box, thereby completely avoiding direct contact between medical personnel and radioactive waste liquid and tubing during continuous injection.

The utility model discloses a device for pretreating nano filter raw materials, which comprises a processing cylinder, a stirring component is arranged in the processing cylinder, and a cleaning component is mounted on the outer wall of the processing cylinder through bolts. After the aeration pump is started, gas can be injected into the spray head by means of cooperation of the runner pipe and the splitter plate, and the gas can slowly flow into the processing cylinder along with continuous injection of the air, so that due to the ingenious structural design, the adhesion phenomenon of materials is effectively avoided, the stirring effect of the materials is remarkably improved, and meanwhile, the stirring efficiency is greatly improved. The motor, the rotating rod and the stirring plate are tightly matched and cooperatively work, and under the ordered operation of the series of components, the device can efficiently stir and mix materials and water, so that the device can smoothly achieve the purpose of cleaning natural ores in nano filter material raw materials, and the cleaning efficiency is improved. And the problem that an existing device is poor in practicability due to the poor raw material cleaning effect is successfully avoided.

The application discloses a preparation method of PbS nanometer cubic quantum dots, which comprises the following steps of lead precursor preparation, nucleation, continuous injection growth and reaction termination. The method realizes the preparation of highly uniform cubic PbS quantum dots in a one-step synthesis process by fine adjustment of a lead-sulfur ratio, temperature and injection speed. The prepared PbS nanometer cubic quantum dots have clean crystal faces, are suitable for theoretical and experimental research and characterization of ligand strength, and can in-situ control the size of nanometer cubic quantum dots compared with the prior art, so that the problem that the size is not adjustable in the prior art is solved. Meanwhile, the preparation method can obtain the PbS nanometer cubic quantum dots with adjustable size and small size, provides new material selection for application in the fields of photoelectric devices and the like, and lays a foundation for further research on the characteristics and performance of the PbS quantum dots.

The utility model belongs to the field of soil improvement equipment, and particularly relates to a soil conditioner injector. The device comprises a vertically arranged inserting rod, a plurality of inner cavities are formed in the lower half section of the inserting rod in the length direction, a plurality of water outlet holes corresponding to the inner cavities are formed in the outer side wall of the inserting rod, the inserting rod is sleeved with a spacer sleeve, a locking assembly is arranged on the spacer sleeve, and a connecting box with an upward opening is fixed to the top of the inserting rod. An infusion tube is connected between the connecting box and each inner cavity, and an adding assembly is arranged on the connecting box. The inserting rod is inserted into the deep position of soil, the adding assembly adds a soil conditioner into the connecting box, the soil conditioner in the connecting box is conveyed to all the inner cavities through the liquid conveying pipe, the soil conditioner in the inner cavities is discharged out of the water outlet holes, and the soil conditioner is injected into the soil around the inserting rod. The soil conditioner can be injected more easily and simply, the soil conditioner can be continuously injected into the soil, the injection mode is simple and convenient, and the labor cost can be saved.

The utility model relates to the technical field of firework fixing devices, in particular to an adjustable firework setting-off fixing device which comprises a base, an adjusting groove is formed in the top end of the base, the inner side of the adjusting groove is rotationally connected with a first threaded rod, and the outer wall of the first threaded rod is in threaded connection with an adjusting base. The adjusting seat is slidably connected with the adjusting groove, a linkage assembly is installed on the adjusting seat and the base, a fixing cylinder is installed on the linkage assembly, and a supporting anti-falling mechanism is installed at the position, close to the bottom end, of the base. The base is simple in structure and convenient to operate, the two sides and the rear portion of the base can be supported when the base is placed, the stability of the base is improved, when the base is placed on the uneven soil ground in suburbs and countries, the positioning cylinders can be inserted, the protruding plates can be unfolded, the positioning effect is further enhanced, the situation that the base topples over when fireworks are continuously sprayed and set off is avoided, and the service life of the base is prolonged. And the safety during firework setting-off is ensured.