56results about How to "Precise flow control" patented technology

The utility model relates to the technical field of high-temperature heat storage and exchange systems, and discloses a molten salt spherical tank heat storage and exchange gas pressure conveying device which comprises a low-temperature molten salt spherical tank and a high-temperature molten salt spherical tank, and gas supply pipeline systems and electric heating boilers are arranged at the tops of the low-temperature molten salt spherical tank and the high-temperature molten salt spherical tank. The electric boiler is arranged on the right side of the low-temperature molten salt ball valve and used for improving the heat storage efficiency at the off-peak electricity price. Continuous or intermittent fused salt conveying is achieved through gas pressure balance and a pressure regulating valve set, low-temperature fused salt liquid obtained after fused salt in the high-temperature fused salt spherical tank is subjected to heat exchange through a gas pressure conveying fused salt heat exchanger is conveyed to the low-temperature fused salt spherical tank to be stored, and the fused salt liquid in the low-temperature fused salt spherical tank is conveyed to the fused salt heater through gas pressure to be heated and then conveyed to the high-temperature fused salt spherical tank. The effects of avoiding the risk of sealing leakage caused by the high temperature of the molten salt pump, being simple in structure, stable in operation, suitable for large and medium-sized molten salt heat storage and exchange systems, capable of accurately controlling the flow, stable in top pressure and rapid in response are achieved.

The utility model relates to the technical field of vehicle-mounted electric control cover plate die-casting, and discloses a new energy vehicle-mounted electric control cover plate die-casting device which comprises a die-casting device body, a baffle is fixedly connected to the left side of the top of the die-casting device body, a die-casting mechanism is arranged at the top of the die-casting device body, and a base is fixedly connected to the bottom of the die-casting device body. A collecting mechanism is arranged at the bottom of the die-casting device body, the die-casting mechanism comprises a die-casting assembly and a stirring assembly, the die-casting assembly is arranged at the top of the die-casting device body, and during use, through the arranged die-casting mechanism, when a vehicle-mounted electric control cover plate needs to be subjected to die-casting work, a first servo motor drives a first threaded rod to rotate; the hydraulic cylinder pushes the push plate, raw materials in the conveying pipe stably and accurately enter the first die, the right side of the second die makes close contact with the left side of the first die, and the sealing performance of the dies in the die casting process is guaranteed.

The utility model relates to the technical field of water purifier descaling, and discloses an efficient descaling water purifier which comprises a water purifier shell, filter bottles, a threaded cover, a threaded groove and filter elements, the inner wall of the water purifier shell is fixedly connected with five groups of filter bottles, the tops of the five groups of filter bottles penetrate through the top of the water purifier shell, and the inner walls of the five groups of filter bottles are provided with the filter elements. Threaded grooves are formed in the outer sides of the tops of the five sets of filter bottles, threaded covers are in threaded connection with the outer sides of the threaded grooves, when a traditional water purifier needs to be used for descaling, a user often needs to search and carry a descaling agent by himself, time and labor are consumed, and the descaling effect is possibly affected due to the fact that the variety or the dosage of the descaling agent is improper. And according to the design, the storage structure is integrated at the top of the threaded cover and specially used for storing the descaling agent, so that the descaling agent can be taken at any time, and the preparation work before descaling is greatly simplified.

A sealed tank comprises a tank body and a tank cover arranged on an opening of the tank body, a first sealing element is arranged between the tank body and the tank cover, at least one side or one corner of the opening edge of the tank body is formed with an inclined portion which is inclined downward from top to bottom, the tank cover is formed with an inclined area corresponding to the inclined portion, a slanting downward discharge port which communicates with the inside of the tank body is arranged in the inclined area, the tank cover is provided with a sealing cover which can open and close the discharge port, and a second sealing element is arranged between the sealing cover and the discharge port. By arranging the inclined portion on the opening edge of the tank body, arranging the corresponding inclined area and the slanting downward discharge port on the tank cover, and arranging the sealing cover with the second sealing element, the discharge port has a flow guide angle due to the inclined design of the inclined portion and the inclined area, so that the pouring flow can be accurately controlled, the spilling and leakage can be reduced, the container inclination angle can be reduced to improve the operation convenience, and the discharge port can be opened and closed separately by the sealing cover, so that the tank cover is not opened frequently, the sealed environment in the tank is maintained, and the diversified use requirements are met.

The utility model belongs to the field of coating production equipment, and particularly relates to a water-based coating performance improving tool which comprises a stirring barrel, and a stirring assembly is arranged in the stirring barrel. The stirring assembly comprises a protection box. According to the utility model, the stirring assembly is arranged, and the turbine blade, the spiral blade and the scraping plate work cooperatively. The turbine blades rotate at the top of the stirring barrel, so that agglomerates above the coating can be effectively scattered, and primary mixing of components is promoted; the spiral blade is arranged in the middle of the transmission rod II, rotates along with the transmission rod, and can drive the coating to circularly flow up and down in the stirring barrel, so that various components are fully mixed in the vertical direction; the scraping plate at the bottom is in sliding fit with the inner wall of the bottom of the stirring barrel, so that pigments, fillers and the like attached to the bottom of the stirring barrel can be cleaned in time and prevented from being accumulated, and uniform mixing of the paint is further ensured, so that the appearance color and physical properties such as hardness and wear resistance of a coating are improved, and the product quality is improved.

The utility model discloses a kind of toilet excrement field returning equipment, it is related to environmental protection and agricultural resource utilization technical field, including storage sewage bin, stirring device, conveying pipeline and distributor, the top end lateral wall of storage sewage bin is equipped with feed inlet, the feed inlet is closed by sealing cover, the inside of storage sewage bin is provided with stirring device, the stirring device includes driving motor, transmission shaft and stirring vane, the driving motor is fixed at the top outside of storage sewage bin, the output shaft of driving motor is connected by shaft coupling with one end of transmission shaft, the other end is penetrated the top of storage sewage bin and extends to storage sewage bin inside, the outer wall of transmission shaft is welded with multiple groups of stirring vane, each group of stirring vane is distributed in spiral shape, the bottom of storage sewage bin is provided with discharge port.The utility model discloses a kind of toilet excrement field returning equipment, by storage sewage bin, the centralized collection of excrement is realized, replace traditional dispersed manual collection mode, reduce labor intensity and improve efficiency.

The application is suitable for the technical field of valve control, and provides a swing valve with controllable flow, which comprises a valve body, a power generation assembly, a swing shaft, an orifice plate flowmeter, a valve clack and a storage battery, an annular insert block is installed in the valve body, a rotating support is fixedly connected to the lower part of the annular insert block, the rotating support is hingedly connected with the swing shaft through a rotating arm, the swing shaft is connected with a first electric rotary cylinder, and the swing shaft is detachably installed with the valve clack. The valve clack comprises a middle body, a left clack, a right clack, a second electric rotary cylinder and a stud, the bottom of the middle body is provided with a wedge-shaped buckle, an electric telescopic cylinder is installed in the valve body, and the telescopic buckle of the electric telescopic cylinder can be matched with the wedge-shaped buckle; the left clack and the right clack are rotated under the driving of the respective second electric rotary cylinder, and the stud clamps or loosens the left clack and the right clack when rotating. The application can switch the flow by controlling the number and angle of the opening of each part, the flow switching has five modes, and the flow of liquid medium can be accurately controlled.

The invention discloses a steel structure rust removal device for a construction site. The steel structure rust removal device comprises a walking plate trailer, a stirring box, a water storage box, a material storage box, a high-pressure pump, a liquid conveying pipe and an air compressor. The stirring box is fixed on the top surface of the walking plate trailer; a liquid outlet is formed in the bottom of one side wall of the stirring box; a water outlet communicated with the inner cavity of the stirring box is formed in the bottom wall of the water storage box; grinding materials are contained in the storage box, and a discharging gate is hinged to the bottom end of the storage box so that the grinding materials can be put into the stirring box and stirred and mixed with water to form grinding liquid; the high-pressure pump is fixed on the outer wall of the stirring box; an inlet of the high-pressure pump communicates with the liquid outlet; one end of the liquid conveying pipe is detachably connected with an outlet of the high-pressure pump, and a high-pressure nozzle is fixed at the other end; the air compressor is fixed to the top face of the walking plate trailer to provide high-pressure air, and an air outlet of the air compressor communicates with the liquid conveying pipe through an air pipe. Water and grinding materials are stirred to form mixed grinding liquid, the mixed grinding liquid is sprayed to the surface of the steel structure through high pressure for rust removal operation, and secondary pollution to the environment is avoided.

The utility model discloses a kind of dry-process acetylene carbide slag pneumatic conveying systems, including carbide slag storage bin, sludge conveyor, carbide slag buffer tank, pneumatic conveying pipeline and reaction kettle, the lower outlet of the carbide slag storage bin is connected with electric plug-in valve one, electric plug-in valve lower portion is connected with feeder, the lower portion of the feeder is connected with sludge conveyor, the end of the sludge conveyor is connected with sludge drop pipe, the sludge drop pipe outlet is connected with electric plug-in valve two, the lower portion of the electric plug-in valve two is connected with carbide slag buffer tank, the lower outlet of the carbide slag buffer tank is connected with control valve, the lower portion of the control valve is connected with the pneumatic conveying pipeline, the lower portion of the control valve is also connected with nitrogen pipeline, and reaction kettle is connected at the end of pneumatic conveying pipeline.The utility model can stably, efficiently convey original carbide slag to subsequent deep processing reaction kettle, reduce enterprise production cost, improve on-site cleanliness.

The utility model discloses a dust removal device of a mining unloading station, which relates to the technical field of mining equipment and comprises an unloading station body and a dust removal box, one side of the unloading station body is provided with the dust removal box, the top end of the dust removal box is fixedly provided with a fan box, one side of the dust removal box is connected with a dust-gas pipeline in a circulating manner, and the dust-gas pipeline is provided with a fan. And an air volume adjusting valve is fixedly mounted in the middle of the dust-gas pipeline. The fan box of the dust removal device of the mining unloading station extracts dust-containing gas generated by the unloading station body through the dust-gas pipeline and the dust hood, the air volume adjusting valve on the dust-gas pipeline can adjust the air volume, the dust-containing gas enters the dust removal box to be treated, dust is discharged from the bottom dust discharge port, and purified gas is discharged from the purified gas outlet. The water pump above the water tank conveys water to the water supply pipe annularly distributed on the outer side of the dust suction hood through the connecting water pipe and the water supply pipe, then the water is sprayed out through the multiple mist spray heads on the inner side to spray and reduce dust in the dust suction hood, the fixing frame is used for stabilizing the water supply pipe, efficient dust removal is achieved, and the unloading station environment is improved.

The utility model discloses a kind of chromatography devices of flow rate and time controllable, belong to medical instrument technical field, including liquid storage bottle, the upper end of liquid storage bottle is provided with inlet, the lower end of liquid storage bottle is provided with pipeline one, the lower end of pipeline one is provided with microfluid pump, the lower end of microfluid pump is provided with chromatography column, the lower end of chromatography column is provided with pipeline two, the lower end of pipeline two is provided with detector, the utility model is by being provided with the structure that liquid flow rate and reaction time can be controlled, the accurate control of liquid flow is realized, controller can automatically adjust the speed of microfluid pump and electromagnetic valve start-stop time according to preset experimental parameter, ensure that liquid flows at the speed set, and complete reaction within predetermined time, this design improves the accuracy and repeatability of experiment, especially suitable for the chromatography experiment that needs accurate control flow rate and time, can effectively improve experimental efficiency and the reliability of data.

The water-saving type fire sprinkler comprises a transfer pipe and an assembly part, an assembly hole is formed in the middle of the transfer pipe perpendicular to the axis direction; the two ends of the transfer pipe are connected to the nozzle and the water supply pipe correspondingly. The assembly part is slidably arranged in the assembly hole and attached to the side wall of the assembly hole. A plurality of water-saving valves with different hole diameters are further arranged on the assembly part, and when the assembly part slides along the assembly hole, the different water-saving valves are correspondingly communicated with the pipe openings of the transfer pipe respectively. The problems that a traditional fire sprinkler is low in adjusting efficiency and insufficient in flexibility are solved.

This invention discloses a water quality monitoring stratified sampling device, comprising a sampling bucket, a support rod at the top of the sampling bucket, an air rod inserted through the middle of the support rod, the air rod penetrating the sampling bucket, a piston plate at the bottom of the air rod, an exhaust channel on one side of the piston plate, and an opening and closing part within the exhaust channel; a locking rod on one side of the support rod, the outer end of the locking rod locking into a lock hole on the top side of the sampling bucket, a rope on the outer side of the locking rod, and a float at the other end of the rope; a main water inlet at the center of the bottom of the sampling bucket, with a valve on the main water inlet; several water outlets on one side of the sampling bucket, with water outlet pipes connected to the water outlets; several rotating parts inside the sampling bucket, dividing the interior of the sampling bucket into several sampling chambers, with an auxiliary drive part at one end of each rotating part, which is installed on the outer wall of the sampling bucket, to achieve independent segmentation of water samples at different depths, effectively avoiding cross-contamination between water samples and improving the accuracy of monitoring data.

The closed fluorine-lined sampling valve comprises a valve body provided with a sample inlet and a sample outlet, a sampling opening communicated with an inner cavity of the valve body is formed in the bottom end of the valve body, a valve seat is arranged in the sampling opening, and an upper valve cover screwed with a valve rod is arranged at the top end of the valve body. One end of the valve rod stretches into the valve body and gets close to or deviates from the sampling opening through spiral movement so as to control on-off of the sampling opening, the other end of the valve rod stretches out of the upper valve cover and is connected with the six-clack hand wheel so as to drive the valve rod to rotate, and fluorine lining layers are arranged on the inner walls of the valve body, the upper valve cover and the valve seat and the outer wall of the valve rod. The bottom end of the valve body is further provided with a sealed sampling bottle with a sealed rubber seal at a bottle opening, the valve seat is communicated with a sampling needle, the sampling needle penetrates through the sealed rubber seal and extends into the sealed sampling bottle, the valve seat is provided with an exhaust port, and an exhaust needle communicated with the exhaust port and the sealed sampling bottle penetrates through the sealed rubber seal. The sampling valve has the advantages that the overall leakproofness and corrosion resistance of the sampling valve are improved, the sampling efficiency and quality of a sampling medium are guaranteed, and meanwhile the sampling cost is reduced.

This utility model relates to the field of feeding equipment technology, specifically a device for rapid feeding of glass fiber products. It includes a storage bin with legs fixedly mounted on its surface. A rotary motor, a uniform feeding rod, an electric telescopic rod, a spring, and an anti-blocking scraper are incorporated. The rotary motor drives the uniform feeding rod to rotate, stirring and dispersing the glass fiber in the storage bin, ensuring uniform and loose material distribution for smooth feeding. The electric telescopic rod precisely adjusts the position of the anti-blocking scraper according to the condition of the inner wall of the discharge hopper, ensuring close contact with the inner wall. Combined with the elasticity of the spring, the anti-blocking scraper adaptively scrapes away residual material from the inner wall of the discharge hopper, preventing blockage. These structures work together to form a work chain from material pretreatment to anti-blockage, effectively avoiding downtime caused by material agglomeration and blockage, and ensuring efficient and continuous feeding of glass fiber products.

The utility model discloses a micro-nano bubble generator capable of controlling the temperature of micro-nano bubble water, which comprises a micro-nano bubble generator main body, the input end of the micro-nano bubble generator main body is provided with an input pipe fitting I, and the output end of the micro-nano bubble generator main body is connected with a temperature control assembly through an input pipe fitting II; the temperature control assembly comprises a mounting support, a cooling fan and a cooler, the cooler is mounted at the bottom of the mounting support, the cooling fan is fixed to the top of the mounting support, and a second pipeline and a first pipeline are fixed to one side of the cooler. According to the micro-nano bubble generator, the generated micro-nano bubble generator body can be effectively cooled through cooling liquid, the temperature of the cooling liquid is monitored in real time through the temperature sensor, backflow and re-cooling of the cooling liquid which does not reach the standard are achieved in cooperation with the first three-way electromagnetic valve, the second three-way electromagnetic valve and the backflow pipe, and it is ensured that the temperature of the output cooling liquid is within the set range; and the accurate requirements of different application scenes on the temperature are met.

The utility model relates to the technical field of distillation gas condensation, in particular to an efficient condensing device for a perfluoropolyether distillation process. Comprising a condensation box body, a gas inlet pipe is installed at one end of the condensation box body, a liquid outlet pipe is installed at the other end of the condensation box body, and a gas return assembly used for recycling uncondensed gas is installed on the liquid outlet pipe; due to the arrangement of the gas return assembly, when distillation steam is not completely condensed in the condensation assembly, uncondensed gas can flow back to the gas inlet pipe from the liquid outlet pipe through the gas return pipe, and recycling of the uncondensed gas is achieved. Raw material loss caused by direct emission of uncondensed gas is avoided, and the production cost is effectively reduced; meanwhile, pollution possibly caused by emission of uncondensed gas to the environment is reduced, and the environmental protection requirement is met.

The embodiment of the present application provides a hydrogen flame chromatograph valve island type gas path constant temperature control device and a control method, and belongs to the technical field of hydrogen flame chromatographs. The hydrogen flame chromatograph valve island type gas path constant temperature control device is characterized in that the device comprises: a plurality of gas path units arranged on a device main body; each gas path unit comprises a plurality of gas path outlets / inlets arranged on the surface of the device main body; an electromagnetic unit is used for adjusting the gas path direction of gas in each gas path pipeline; a constant temperature unit is arranged in the device main body and is used for adjusting the temperature of required gas for FID analysis in each gas path pipeline; the electromagnetic unit and the constant temperature unit are both connected to a control unit, and the control unit is used for executing the control of the electromagnetic unit and the constant temperature unit based on the current required parameters of FID analysis. The present application solves the problem that the existing hydrogen flame chromatograph cannot guarantee that the gas supply state meets the best working state of the chromatograph during the test process, thereby improving the detection result accuracy.

The utility model discloses an internal adjustable liquid storage bin of a colloid storage battery, and relates to the technical field of storage batteries, in particular to the internal adjustable liquid storage bin of the colloid storage battery, which comprises an outer shell and a top shell, and the top shell is fixedly arranged above the outer shell; the confluence hole is formed between the liquid storage cavity and the electrolysis cavity, and the flow of the electrolyte is accurately controlled by utilizing the adjusting assembly, so that the electrolyte can be more uniformly distributed around the polar plate assembly, and full contact and large-area contact between the electrolyte and the polar plate assembly are realized; the chemical reaction efficiency between the electrolyte and the polar plate is improved, and the optimal contact effect can be achieved under various conditions. According to the utility model, the problem of poor contact effect of electrolyte and the polar plate in the prior art is effectively solved, the charge-discharge efficiency and the overall performance of the storage battery are remarkably improved, the service life of the storage battery is prolonged, and the adaptability and the stability of the storage battery under different working conditions are enhanced.

The utility model relates to metal surface treatment technical field especially relates to a metal surface treatment equipment with high -efficient rust removal function, including the box door, the rear end of box door is installed with the box body device through the hinge, the front end middle part fixed connection of box door has the observation cover, the upper end middle part fixed connection of box body device has the processing device, the lower box wall middle part fixed connection of box body device has the fixed link, the upper end fixed connection of fixed link has the bearing openwork dish, the front end left part fixed connection of box door has the control module. The metal surface treatment equipment with high -efficient rust removal function, through the high -efficient environmental protection of multidirectional spray rust removal liquid, has no dust pollution, and the waste liquid can be recycled and reduce the cost, can accurately control and reduce metal damage, guarantees the follow -up use performance of metal, and the efficiency of metal surface treatment is comprehensively promoted.

The utility model provides the equipment of dropping of reation kettle, including base and fixed base, be provided with the limiting component on the fixed base, the limiting component includes limit gear, rack seat, screw rod and rotating column, the inside rotation connection of fixed base has rotating column through bearing, the bottom fixed mounting of fixed base has installation shell joint. Through setting limiting component, rotate the rotating seat to proper angle, rotate hand wheel, and then carry out the limiting to rotating seat, can easily switch the required reagent corresponding liquid storage barrel to the dropping position through rotating rotating seat, need not complicated dismounting and reinstallation process, improved the convenience of operation, when rotating seat switched target liquid storage barrel to proper position fixed, can ensure that the relative position of dropping pipe and liquid storage barrel export is stable, help accurate control the speed, flow and direction of drop, avoid the drop error caused by the position instability, thereby improve the accuracy and repeatability of reaction.

The utility model discloses a grain moistening device for baijiu brewing, and relates to the technical field of baijiu brewing. Comprising a grain moistening barrel, a liquid input channel, a liquid buffer cavity and a grain moistening channel composed of upper and lower semicircular grain moistening pipe sections are arranged in the grain moistening barrel, and a grain storage box is arranged on the outer side of the top of the grain moistening barrel and communicated with the input end of the grain moistening channel through a grain transition channel. The device further comprises a filter cartridge, an opening and closing barrel, a stirring rotating rod and the like. According to the grain moistening device, through the unique structural design, grains and grain moistening liquid are uniformly mixed, and the grain moistening uniformity is improved; the grain conveying process is optimized, and blockage is reduced; the filtering and flow control functions are achieved, the liquid purity is guaranteed, and the flow is accurately controlled; moreover, maintenance and cleaning are convenient, efficient and stable equipment support is provided for the grain moistening link of baijiu brewing, and the baijiu quality and the baijiu yield can be improved.

The utility model provides a cooling machine for ice cream. The cooling machine comprises an inner cylinder, an outer cylinder, a top plate, a bottom plate and a cylinder wall scraping device, the inner cylinder is used for containing ice cream raw materials and sleeved with the outer cylinder, a cooling cavity filled with refrigerant media is formed between the inner cylinder and the outer cylinder, and the raw materials are rapidly and evenly cooled. The cylinder wall scraping device comprises an upper rotating block, a lower rotating block and a scraper on a spiral connecting rod, and is driven by a driving assembly to rotate, materials attached to the inner cylinder wall are effectively scraped, caking is prevented, and the heat transfer efficiency is improved. The discharge port is connected with a discharge pipe and is provided with a stop valve, so that discharge is convenient to control. The equipment is reasonable in structure and high in cooling efficiency, raw material waste can be prevented, and the product quality and the production automation degree are improved.

The application discloses a Malan-goni drying method and a wafer processing device, and the method is applied to the wafer processing device, the wafer processing device comprises a swing arm for swinging a liquid nozzle and an air nozzle, and the Malan-goni drying method comprises the following steps: in a first stage, the liquid nozzle starts to supply liquid to the wafer surface from a starting position towards the wafer center to perform liquid film covering, meanwhile, the air nozzle sprays air outward under the condition of ensuring that the liquid film is not torn, and the swing arm stays for a first preset time; in a second stage, the liquid nozzle and the air nozzle move following the swing of the swing arm, meanwhile, the liquid nozzle keeps supplying liquid, and the air nozzle reduces the air flow to avoid tearing the liquid film; in a third stage, when the air nozzle moves to a position towards the wafer center, the air flow of the air nozzle is increased to a corresponding flow for performing Malan-goni drying, and the swing arm stays for a second preset time.

The utility model relates to the technical field of welding automation, concretely is a kind of welding auxiliary device of adjusting flux supply quantity, the core technical effect of the device is reflected in two aspects of accurate feeding and efficient recovery, the design of cylinder drive baffle, lock pin positioning in feeding module, accurately control flux flow;Vibration module utilizes driving motor to drive cam to make conveying pipeline vibrate, ensure that flux is smoothly conveyed to welding interface, in the recovery aspect, the air pump of power module provides suction force for collection head, and excess flux is quickly recovered, and the filter screen in recovery pipeline effectively filters impurities, realizes flux purification and reuse, improves resource utilization, reduces welding cost.

The utility model relates to shock absorber technical field, and disclose a shock absorber internal hydraulic buffer stop structure, including the first cylinder, the first cylinder inner wall top is fixedly connected with the second cylinder, the oil cavity is formed between the first cylinder and the second cylinder, the second cylinder inner wall is provided with buffer stop mechanism. Through buffer stop mechanism realizes double buffering effect. When piston rod drives piston to move downward, second fixed ring moves down with piston, extrudes lift ring, makes buffer spring compression, utilizes the elastic deformation of spring to absorb vibration energy, provides first buffering, when piston continues to move down and approaches limit position, second fixed ring and the rubber block of first fixed ring top contact, the elastic buffer of rubber block further reduces piston descending speed, realizes second buffering. Double buffering mechanism not only effectively reduces vibration transmission, still can prevent piston and cylinder rigid impact under extreme working condition, prolongs shock absorber life.

The utility model discloses a wax injection spiral conveying device which comprises a conveying module connected with a wax cylinder, the conveying module is provided with a wax conveying channel, an injection nozzle is arranged at the output end of the wax conveying channel, a feeding screw rod is rotationally arranged in the wax conveying channel, and the feeding screw rod is provided with a feeding hole. The feeding screw is in transmission connection with a driving element used for driving the feeding screw to rotate relative to the wax feeding channel. And when the feeding screw rod rotates relative to the wax feeding channel, wax liquid in the wax feeding channel is pushed to flow towards the nozzle. Under the action of the feeding screw, stable conveying of the wax liquid is guaranteed, and the wax injection amount can be adjusted by adjusting the rotating speed of the feeding screw.

The utility model relates to the technical field of extraction equipment, in particular to an extraction kettle convenient to pressurize, which comprises a kettle body, the kettle body is of a cylindrical extraction kettle structure, a jacket is sleeved outside the kettle body, and a stirring rod penetrates through the kettle body. According to the extraction kettle convenient to pressurize, steam can uniformly enter the jacket to indirectly heat materials in the kettle body through the symmetrical steam inlets in the two sides of the kettle body, the pressure in the kettle is gradually increased along with temperature rise, the temperature and the pressure in the kettle can be quickly and uniformly increased through the heating mode, and further, the heating efficiency is improved. The electromagnetic valve in the circulating water pipe accurately controls on-off and flow of circulating water, when the pressure and temperature in the kettle are too high, it is ensured that the extraction process is carried out in a proper temperature and pressure environment through cooling of the circulating water and indirect auxiliary pressure control, and in the heating and pressurizing use period of the device, the temperature of materials in the kettle is measured through the thermometer; and an operator can adjust the temperature in time according to the temperature condition, so that the temperature in the kettle can be accurately controlled.

The utility model relates to the technical field of liquid packaging, transportation and storage, in particular to a connecting fitting of a packaging bag which is used for subpackaging chemicals and is particularly suitable for photoresist products, and the connecting fitting comprises a connector, a buckle, a flow meter, a feeding pipe and a discharging pipe, the connector serves as an inlet and outlet for feeding and discharging of the packaging bag and is arranged at the top of the packaging bag. The outer side of the connector is sleeved with a buckle. The flowmeter sleeves the outer side of the buckle; one end of the feeding pipe or the discharging pipe penetrates through the buckle and the connector and extends into the bottom of the packaging bag, and the other end of the feeding pipe or the discharging pipe is connected with the flowmeter. The flowmeter is provided with a flow hole with a certain size, the bottom of the flow hole is communicated with an inlet of the feeding pipe or the discharging pipe, and the top of the flow hole is used for being connected with an external conveying pipeline. According to the utility model, chemicals can be quickly fed and discharged, the leakage risk is reduced, manpower assistance is realized, repeated discharging can be realized according to use requirements, the discharging weight can be accurately controlled, all the chemicals can be discharged during discharging, and the purposes of zero residue and chemical saving are achieved.