75results about How to "Control flow" patented technology

The application relates to a pressure-reducing well pressure-bearing backfilling and plugging device and method, which adopts a pressure-reducing well pressure-bearing backfilling and plugging device and a plugging process of filling materials in stages. First, an axial compression rubber sealing ring is used to make the rubber sealing ring radially expand and tightly contact with the inner wall of a well pipe to form a sealing structure, then the sealing structure is used to control the water body pressure and flow trend in the well to form a water isolation section, and a pressure pump of a filling material function module is used to pump the first filling material into the space below the sealing structure in the well pipe through the steel pipe to complete the first filling material pumping; after the first filling material solidification is completed, the second filling material is poured into the space above the sealing structure in the well pipe, and after the second filling solidification is completed, the backfilling and plugging complete the second filling material pumping. Through the characteristics that the rubber ring is more compact after being radially extruded and deformed, the rubber ring and the pressure-reducing well wall are tightly compacted, so that the water isolation and sealing effects are achieved.

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.

The utility model discloses a pressure stabilizing control valve with a double-cavity structure, which comprises a valve body, two sides of the valve body are fixedly connected with connecting pipes, the inside of the valve body is fixedly connected with a partition plate, the inside of the partition plate is fixedly connected with a water through ring, and the top end of the valve body is movably connected with a mounting cylinder. According to the pressure stabilizing control valve of the double-cavity structure, the positioning base is arranged, a positioning bolt is rotated to be separated from the interior of a threaded hole after being used for a long time, then a positioning disc can be pulled to detach the mounting barrel from the top end of the valve body, and then a spring in the mounting barrel can be detached to be rapidly replaced; the situation that the pressure stability is affected by fatigue due to long-time work of the spring is prevented, after completion, the mounting cylinder is inserted into the positioning base, meanwhile, the positioning disc is attached to the top end of the positioning base, the positioning bolt penetrates through the positioning disc and then is rotated into the threaded hole, and therefore the mounting cylinder is positioned through the positioning disc, and the problem that the pressure value is not stable enough after long-time work is solved.

A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.

The utility model relates to a kind of driving structure, belong to microfluidic chip technical field, specifically a kind of liquid driving structure of microfluidic chip;In the utility model, when elastic film is used for a long time, limit frame is removed, so that limit frame and fixed frame separate, then elastic film is removed, new elastic film is sleeved on limit column, then limit frame is covered, and elastic film is fixed, so that elastic film is replaced easily, cooperation is carried out by motor, carousel, threaded rod, threaded block, connecting column, sliding frame and extruding roller, the speed of reciprocating movement of extruding roller is adjusted by the rotation of motor, so as to adjust the flow rate of liquid, when the flow of liquid needs to be adjusted, threaded rod is rotated, since threaded block is screw thread connected on threaded rod, so threaded rod moves along with the rotation of threaded block, drives connecting column to move, so that the range of sliding frame movement reduces, the extrusion degree of extruding roller to elastic film is reduced, so as to control the flow of liquid, improve the practicability of the device.

The utility model provides a waste heat recovery device for a steam pipeline, belongs to the technical field of waste heat recovery, and aims to solve the problems that high-temperature and high-pressure steam is transmitted for a long time in a conveying pipeline with too many bends, the consumption is high, the efficiency of converting the high-temperature steam into electric energy is not high, a pipeline system is complicated, and the conveying process needs to be detected. The heat utilization mechanism is mounted in the steam conveying pipeline; one end of the conveying mechanism is fixedly communicated with the heat utilization mechanism; the liquid control mechanism is communicated with the conveying mechanism; the steam conveying pipeline is arranged in the steam boiler and is resistant to high temperature and corrosion, the heat preservation performance is high, and a steam pipe network is monitored in real time; the heat utilization mechanism is inserted into the steam conveying pipeline to improve the steam utilization rate; high-temperature and low-temperature liquid flows in or out in a one-way mode, and auxiliary absorption of waste heat is rapidly completed.

The utility model relates to a die-casting die for an aluminum shell, which comprises an upper die frame, a lower die frame and die feet, the upper die frame and the lower die frame are stacked up and down, an upper die core and a lower die core which are stacked up and down are arranged between the upper die frame and the lower die frame, and a die cavity structure is formed between the upper die core and the lower die core. Mold feet are installed on the lower end face of the lower mold frame, the left end and the right end of the mold cavity structure extend towards the front side to form a butt joint plate forming cavity, a sprue bush is installed at the front portion of the upper mold frame, and a sprue spreader cover plate and a sprue spreader base are installed at the lower end of the sprue bush. The sprue spreader cover plate and the sprue spreader base are arranged in an upper shoe stacking manner, a sprue structure in butt joint with the sprue bush is formed between the sprue spreader cover plate and the sprue spreader base, and two main runners extending to the front end of the mold cavity structure are symmetrically arranged on the rear side of the sprue structure. The utility model has the characteristics that the product quality is ensured, the product completeness is ensured, the molten aluminum channeling phenomenon is avoided, and the like.

The utility model discloses a novel universal shaft assembly, including bottom plate, be provided with fixed subassembly on the bottom plate, the fixed subassembly includes mounting seat, fixed base, bolt, first axle body and second axle body, the mounting seat fixed mounting is at the both ends of bottom plate's top, the fixed base can be detached and installed on the mounting seat, the bolt can be detached and installed between fixed base and mounting seat, first axle body and second axle body are placed on the mounting seat respectively, be provided with disassembly subassembly on the fixed base, the disassembly subassembly includes oil injection pipe, connecting pipe and resist the pole, oil injection pipe fixed mounting is on the fixed base, connecting pipe fixed mounting is on the oil injection pipe, resist the pole sliding connection on the connecting pipe, to solve the background art mentioned in the installation fixed time of current universal shaft, although the traditional method can ensure the firmness of universal shaft, when universal shaft needs to maintain or replace, the more complicated technical problem.

This utility model relates to the technical field of electronic component testing equipment, specifically a Kelvin testing device. It includes a high-temperature resistant insulating housing, an adjustment bracket, a high-temperature resistant insulating cover, a push-button switch, and an inert gas inlet. The adjustment bracket is installed inside the high-temperature resistant insulating housing, and the component under test (DUT) is placed on the adjustment bracket. The position of the adjustment bracket is adjustable to ensure that the DUT is aligned with the test point. The high-temperature resistant insulating cover is hinged to the high-temperature resistant insulating housing, and the push-button switch is installed on the high-temperature resistant insulating housing, allowing the cover to be opened and closed by pressing the switch. The inert gas inlet is fixed to the high-temperature resistant insulating housing and connected to an inert gas source pipeline. It provides a stable testing environment, adapts to DUTs of different sizes, is high-temperature resistant and insulating, and protects the safety of the tested component.

The application discloses a novel overspeed protection device, which comprises a device body, wherein the device body comprises a base, a support device, an assembling table, a terminal mounting table, a terminal box and a protection device; the support device is provided in one group, and the support device is fixed on the top of the base through welding; the assembling table is fixed on the top of the support device through welding; the terminal mounting table is fixed on the front end of the assembling table through screws; the terminal box is fixed on the terminal mounting table through screws; and the protection device is installed on the top of the assembling table; the protection device comprises an integrated block, a first electromagnetic valve, a second electromagnetic valve, a hydraulic control reversing valve, a safety oil pipe, a pressure oil pipe, an oil return pipe, a pressure switch and a pressure gauge. The device can more accurately control the flow direction and pressure of oil, can quickly and accurately perform protection actions such as safety oil unloading when abnormal conditions such as overspeed occur, and can guarantee the safe operation of equipment and improve safety.

This utility model relates to the field of topical medication application technology and discloses a disposable application brush for applying topical hormone medications, including a connecting nozzle, an application nozzle, and an adjusting clip. The connecting nozzle has a groove that engages with the outside of the dispensing port on the topical ointment. The application nozzle is integrally formed on the top of the connecting nozzle and has a receiving chamber for holding 2.5g of medication. A sliding ball for applying the medication rotates at the top of the application nozzle. The adjusting clip is inserted into a slot at the connection between the application nozzle and the connecting nozzle, with the slot located at the bottom of the receiving chamber. A circular piece at the center of the adjusting clip is used to seal the dispensing port. By specifying the rolling area of ​​the sliding ball and the corresponding dispensing amount, users can more precisely control the amount of medication applied each time, facilitating medication management and avoiding overdose and waste. The sliding ball design at the top of the application nozzle avoids direct contact with the medication by hand, reducing the risk of infection and also making the application process more even.

The utility model discloses a PH and density detection system for a wet desulphurization process. The PH and density detection system comprises a plurality of sampling branch pipes, a sampling header pipe and a detection tank, the number of the sampling branch pipes corresponds to the number of circulating pumps on the desulfurizing tower, one end of each sampling branch pipe is connected with an outlet of the circulating pump, the other end of each sampling branch pipe is connected with a sampling header pipe, the sampling header pipe is connected with a slurry inlet in the bottom of a detection tank, and the detection tank is provided with a PH meter interface, a differential pressure densimeter interface and an overflow port. The overflow port is connected with the desulfurization tower through a pipeline; according to the utility model, slurry in all directions in the tower can be comprehensively collected in real time in a manner of sampling at the outlet of the circulating pump, so that the accuracy of PH and density detection data is improved; through a positive pressure sampling mode, pipeline blockage caused by a static pressure self-flowing mode can be avoided; through the electric regulating valves at the head ends of the branch pipes, the flow of each branch sampling pipeline can be balanced, the flow speed of sampling slurry is controlled, the flow stability is ensured, and the abrasion of an instrument probe is reduced.

The utility model discloses a high-precision stationary pollution source carbon dioxide measuring device, which relates to the technical field of carbon dioxide measuring devices and comprises a carbon dioxide measuring device and a smoke sampler, a case is mounted in the carbon dioxide measuring device, a heat tracing pipe is connected between the carbon dioxide measuring device and the smoke sampler, and the heat tracing pipe is connected with the smoke sampler. The flue gas sampling device further comprises a back flushing device, and an output pipe of the back flushing device extends to the flue gas sampler. A touch screen is arranged on the outer side of the machine box, a flowmeter is fixedly installed outside the machine box, a power switch is fixedly installed on the outer side of the machine box, a network port is formed in the machine box, a plurality of DB serial ports distributed at equal intervals are formed in the machine box, the size of the machine box is designed according to the standard in the industry, and the machine box is installed in a standard 19-inch machine cabinet system in a modularized mode. According to the design, real-time online monitoring of organized emission of carbon dioxide from stationary pollution sources is effectively achieved, and a support is provided for national double-carbon work.

The utility model provides a kind of automation jellyfish filters, sterilization equipment, it is related to jellyfish field. Including main support and support platform, the top of support platform is fixedly connected with inlet conduit, the inner wall of inlet conduit is inserted with liquid storage bin, the bottom of support platform is fixedly connected with DC motor one, the output shaft of DC motor one is fixedly connected with force disc, the top of force disc is rotatably connected with force cam, force cam is slidably connected in the inner wall of stress linkage plate, the side of stress linkage plate is fixedly connected with blockage platform. The application is set through support platform, inlet conduit, liquid storage bin, DC motor one, force disc, force cam, stress linkage plate, blockage platform, liquid passage, can reach the purpose of accelerating dirty sedimentation efficiency, solve the mode of natural sedimentation dirt, the problem of too low efficiency, greatly improve practical effect, and the flow of chemical liquid can be controlled, avoid waste phenomenon.

The utility model discloses an agricultural irrigation water dropper which comprises a main water dropping hose, auxiliary water dropping hoses and water dropping pipes, a plurality of sets of supporting pipes are installed on the outer side of the main water dropping hose respectively, the auxiliary water dropping hoses are detachably connected to the interiors of the supporting pipes respectively, and the supporting pipes are installed on the two sides of the main water dropping hose in an arrayed mode. The auxiliary dripping hoses are connected to the interiors of all the sets of supporting pipes correspondingly, the auxiliary dripping hoses are installed according to the use requirements of agricultural land, meanwhile, the installing bases are installed at the tops of all the sets of supporting pipes, the conveying hoses are installed at the tops of the installing bases, and the dripping pipes installed on one sides of the conveying hoses are inserted into soil; water is conveyed into the multiple sets of auxiliary water dripping hoses from the main water dripping hose, then conveyed into the conveying hose through the auxiliary water dripping hoses and finally discharged into soil from the water dripping pipe, the main water dripping hose is supported by the supporting assembly installed on the outer side of the supporting pipe, and the stability and reliability of the irrigation system are guaranteed.

A RAP asphalt mixture asphalt extraction device relates to the field of road engineering material testing technology, and is used to solve the problems of insufficient filtration accuracy, low filtration efficiency, cumbersome operation, and lack of flow monitoring in existing technologies. The device includes an integrated frame (1), on which a stirring extraction module (2) and a pressurized filtration module (3) are installed. The liquid outlet of the stirring extraction module (2) is connected to the liquid inlet of the pressurized filtration module (3) through a guide pipe (5). The pressurized filtration module (3) includes three industrial syringe assemblies connected in series. Each assembly contains filter plates with different filtration accuracies. The device also includes the connection and working cooperation between the propulsion assembly and the syringe plunger (301-1) of the industrial syringe assembly. Gradient filtration is achieved by sequentially passing through a three-stage filtration unit with millimeter-level filtration layer, micron-level filtration layer, and nano-level filtration layer. This device can realize integrated operation, gradient filtration purification, pressurized high-efficiency filtration, and real-time monitoring of liquid flow.

The utility model relates to a kind of efficient adjustable cloth coating machine, including spraying box, the top of spraying box is installed feed tank, the discharge port of feed tank is installed feed pipe, water swivel joint is connected with the one end of feed pipe, the other end of water swivel joint is connected with the feed hollow disc feed end, feed hollow disc is set in spraying box inner chamber one end, the outside of feed hollow disc is movably connected with spraying box inner wall, the inside of feed hollow disc is fixedly connected with adjusting column, the other end of adjusting column is connected with the corresponding end of spraying box, the surface of adjusting column is installed several spraying injection plates, feed hollow disc inside is communicated with discharge pipe, the discharge end of discharge pipe is communicated with the feed end of spraying injection plate, the outside of feed hollow disc is installed intermittent adjusting mechanism;The utility model is by installing feed hollow disc and intermittent adjusting mechanism on spraying box, drive spraying injection plate to rotate, four spraying injection plates can be from different angles to cloth are sprayed, improve the uniformity and efficiency of coating.

The utility model relates to the technical field of vibrating screening machines, and discloses a mining vibrating screening device which comprises a base, a screening box is connected to the base through a vibrating mechanism, a screening groove is formed in the screening box, a detachable screen is connected to the interior of the screening groove, and a feeding groove is connected to the portion, located on one side of the screening groove, of the screening box. The bottom of the feeding groove is of a slope structure, an outlet of the feeding groove faces one side of the screening groove, a material control assembly used for controlling material flow is arranged at the outlet of the feeding groove and comprises a baffle, hydraulic cylinders are arranged on the screening box and located on the two sides of the feeding groove respectively, the telescopic ends of the two hydraulic cylinders are connected with a mounting frame, and the baffle is connected to the mounting frame. The bottom of the baffle is connected with a plurality of adjusting plates with adjustable intervals. Through mutual cooperation of the adjusting plate with the adjustable distance and the baffle with the adjustable height, the ore feeding speed and the feeding amount are controlled, accumulation of materials on the screen is reduced, screen blocking is reduced, and the screening efficiency is improved.

The utility model relates to the technical field of reduction iron powder magnetic separation, concretely to a kind of reduction iron powder high-efficiency magnetic separation device, including vibrator, the surface of vibrator is equipped with magnetic separator, the surface of vibrator is provided with material supporting device, material supporting device includes first motor, first motor is fixedly connected with the side of vibrator, the driving end of first motor is fixedly connected with rotating disc, the surface of rotating disc is placed with pull bar, the lower surface of vibrator is placed with guide plate, guide plate is located in the side of magnetic separator magnetic roller, the lower surface of guide plate is placed in the other end of pull bar, the lower surface of guide plate and rotating disc is all fixedly connected with connecting block, pull bar is rotatably connected with the surface of two connecting blocks, the lower surface of vibrator is provided with guide component.The utility model, by setting material supporting device, material can be effectively separated, avoid the worker to spend a lot of time to separate waste again, to improve the separation efficiency of separation device.

This invention discloses a device for reducing molten tin contamination at the tail end of a tin bath, comprising a tin bath with a molten tin pan inside. A transition chamber is located at one end of the molten tin pan, and a slag box is located at the lower end of the transition chamber. A cooling mechanism is installed inside the slag box. A buffer chamber is located at the end of the transition chamber away from the molten tin pan, and an adjustment mechanism is located at the upper end of the buffer chamber. An annealing chamber is fixedly connected to the end of the buffer chamber away from the transition chamber. This invention can reduce the degree of contamination of molten tin in the tin bath, improve glass quality, and reduce molten tin consumption. A cooling mechanism and a pressure detection device are installed at the bottom of the slag box. The opening at the connection between the transition chamber and the annealing chamber is adjustable. A buffer chamber is located at the front end of the annealing chamber, and a gas flow rate detection device is installed in the buffer chamber to monitor the flow rate and prevent excessive gas from the transition chamber from entering the annealing chamber.

The utility model discloses an intelligent flow mixing system of a sintering mixer, which comprises a bracket, a material bin mounted on the bracket, and a blanking pipeline arranged below the material bin, and is characterized in that a storage box is mounted on the bracket, a second rotating shaft is connected to the storage box in a penetrating manner, and the second rotating shaft is provided with a first rotating shaft and a second rotating shaft; and the second rotating shaft is connected to the interior of the discharging pipeline in a penetrating mode, and a conveying piece is arranged on the outer side of the second rotating shaft and located in the discharging pipeline. According to the intelligent flow mixing system of the sintering mixer, coke powder is evenly injected to the upper end of the sintering machine through a discharging pipeline at the bottom of a material bin, a first motor in a storage box is started, the first motor drives a first rotating shaft to rotate, and the first rotating shaft drives a second rotating shaft to rotate through a driving part; the second rotating shaft drives the conveying part to stably rotate in the discharging pipeline, so that the discharging speed and flow of coke powder are effectively controlled, the situation of blockage or uneven discharging is avoided, and it is ensured that the sintering machine obtains uniform and stable material supply.

The invention belongs to the technical field of constructional engineering and structural reinforcement, and particularly discloses a method and a system for repairing defects of a sloping roof concrete structure. Comprising the following steps: identifying a sloping roof defect, and carrying out quantitative evaluation on the sloping roof defect; based on the sloping roof defects and the quantitative evaluation result, grouting hole position and hole distance optimization design is carried out, and the optimized grouting hole position and hole distance are obtained; according to the optimized grouting hole positions and hole distances, the single-hole grouting amount is optimally distributed; drilling, bottom filling and reverse top supporting are conducted according to the optimally distributed single-hole grouting amount, the grouting hole position and the hole distance; laying a grouting stop belt and mounting a grouting nozzle; performing low-pressure slow injection and multi-time supplementary injection under hierarchical control; and the grouting part is subjected to maintenance and defect reinspection. Through organic combination of defect identification, defect risk quantitative evaluation, grouting hole position and grouting amount optimization design, sloping roof grouting repair and repair effect quantitative evaluation, accurate repair and quantitative control of sloping roof concrete structure defects are realized.

The present application relates to the technical field of energy storage, and particularly relates to a direct cooling system. The direct cooling system comprises a compressor, a heat exchanger, at least two throttles and at least two liquid cooling plates, the compressor, the heat exchanger, the at least two throttles and the at least two liquid cooling plates are configured to be connected in sequence to form a refrigeration cycle loop for refrigerant to flow in the refrigeration cycle loop. The heat exchanger is configured as a condenser in the refrigeration cycle loop, the at least two throttles are connected in parallel, the at least two liquid cooling plates are connected in parallel, the at least two throttles are connected with the at least two liquid cooling plates one by one, the at least two liquid cooling plates are configured to exchange heat with the battery cell corresponding to the battery pack, and the throttle is configured to adjust the opening degree to adjust the flow of refrigerant in the corresponding liquid cooling plate. The flow of refrigerant in each liquid cooling plate can be controlled by respectively arranging a throttle upstream of each liquid cooling plate, thereby achieving uniformity of flow distribution.

The present application belongs to the technical field of water pump, and relates to a pump capable of increasing flow and pressure, comprising a pump body, a water inlet and a water outlet arranged on the pump body, an impeller and a water outlet cover arranged in the pump body and used for guiding pressurized fluid to the pump cavity, the water inlet and the inlet of the impeller being communicated through a flow channel body, the flow channel body comprising a throat pipe and a nozzle, the water outlet and the nozzle being respectively communicated with the pump cavity, the outer side of the nozzle being provided with a conversion turbine driven by a power device in two directions, the water pump being in a flow-increasing mode and a pressure-increasing mode respectively when the conversion turbine rotates in different directions, the conversion turbine driving fluid to flow in the opposite direction of the nozzle in the flow-increasing mode, and the conversion turbine driving fluid to flow in the direction of the nozzle in the pressure-increasing mode. The pump capable of increasing flow and pressure can select a high-flow mode or a high-lift mode according to actual requirements.

This invention relates to the technical field of liquid cooling systems, and more particularly to a flow blocking mechanism, a thermally adaptive flow regulation device, and a method. The device includes a temperature control component comprising a heated element that deforms with temperature changes and a driving element that sets the deformation direction of the heated element, the free end of the driving element forming a driving surface; and an adjustment component, fitted to the free end of the driving element, comprising a regulator, the sidewall of which has a lifting surface that mates with the driving surface, the tail end of which extends into the medium pipe to form a blockage. This flow blocking mechanism, thermally adaptive flow regulation device, and method utilize the deformation of the heated element due to temperature changes to control the movement of the driving element along the deformation direction of the heated element, thereby moving the regulator and changing the flow cross-section of the medium pipe to achieve automatic flow regulation with temperature changes.

The present invention relates to substituted imidazopyridazine derivatives of Formula (I) wherein the variables have the meaning defined in the claims. The compounds according to the present invention are useful as pΙ3Κβ inhibitors. The invention further relates to processes for preparing such novel compounds, pharmaceutical compositions comprising said compounds as an active ingredient as well as the use of said compounds as a medicament.

The utility model relates to medicinal herb processing equipment technical field, concretely is a kind of grinding device for medicinal herbs, including grinding machine body, the top of grinding machine body is integrally formed with feed hopper, the surface of feed hopper is slidably connected with adjusting plate, the surface of adjusting plate is slidably connected with sieve plate, one end of sieve plate is inserted with baffle, baffle is pressed on the surface of feed hopper, the surface of the other end of baffle is rotatably connected with limit stop, limit stop is pressed on the surface of adjusting plate, the surface of one end of feed hopper is slidably connected with clamping plate, clamping plate is clamped on the surface of adjusting plate, adjusting plate is braked;Beneficial effects are: setting adjusting plate, sieve plate is fixed in position using baffle, to adjust the opening size of feed hopper, realize the control to medicinal herb feed speed and flow, reduce the risk of equipment blockage, improve the production efficiency of equipment, set sieve plate, carry out preliminary screening to medicinal herbs, ensure that the granularity of ground medicinal herbs is more uniform.

The utility model relates to the technical field of injection molds, in particular to an injection mold capable of controlling the material flow speed. The device comprises a first mold and an adjusting assembly, the adjusting assembly comprises a connecting block, the connecting block is fixedly connected to one side of the first mold, a connecting column is slidably connected to the interior of the connecting block, a rotating groove is formed in the top of the connecting column, and the interior of the rotating groove is in a convex shape; the interior of the rotating groove is rotationally connected with a rotating block, and the rotating block is in a convex shape. According to the injection mold capable of controlling the material flow speed, when injection molding work is carried out, a rotating block can push a limiting block to move downwards through a connecting column, and meanwhile by observing the height difference between a graduated scale and a handle, the limiting block moving downwards can control the size of the inner space of a conveying groove; therefore, the speed and the flow of injection molding materials can be accurately controlled, flexible adjustment can be carried out according to material characteristics, and it is ensured that various types of plastic can be formed in the optimal state.

The utility model discloses a simple line drawing device for highway engineering construction, which comprises a first frame and a front roller connected to the bottom of the first frame, the top of the first frame is connected with a first extension rod, and the top of the first extension rod is connected with a grip; a second extension rod is hinged to a rod body of the first extension rod, the other end of the second extension rod is connected with a second frame, the bottom of the second frame is connected with an auxiliary roller, and a limiting plate is arranged above the hinged position of the second extension rod and the first extension rod; a hopper is connected to a rod body of the first extension rod, a valve is connected to the bottom of the hopper, a material guiding guide pipe is connected to the valve and connected to the second extension rod and an L-shaped rod through fastening assemblies, one end of the L-shaped rod is connected to the second frame, and the other end of the L-shaped rod is arranged behind the auxiliary roller. According to the lime scattering device, the workload can be reduced, the working efficiency is improved, the lime scattering uniformity is improved, the lime scattering opening is close to the ground, and lime scattering is not prone to being caused.