114 results about "Blowpipe" patented technology

The invention discloses a rapid assembly welding construction method for boiler steam blowpipes. The method comprises the steps that small-pipe-diameter and large-pipe-diameter welding auxiliary structures are manufactured, pipelines are hoisted to the installation position for butt joint, the corresponding welding auxiliary structures are selected according to the pipe diameters so that pipe openings of the pipelines can be aligned and preliminarily welded and positioned, and final butt joint welding is completed after the auxiliary structures are dismantled. An auxiliary mounting and welding structure of the automatic screwing device is further manufactured, and the device enables a screwing driving mechanism to be in butt joint with a connecting bolt, a nut or an adjusting bolt by adjusting the positions of all parts and drives the screwing driving mechanism to rotate. According to the assembly welding device, the technical effects of quickly and accurately completing assembly welding of the boiler steam blowpipes and improving the construction efficiency and quality are achieved.

The utility model belongs to ironmaking technical field especially is a kind of ironmaking impurity removal mechanism, including shell body, shell body one side inner wall is equipped with mounting plate, and the inside installation of shell body is equipped with connecting plate, connecting plate one side is provided with several guide plates, the bottom of guide plate is all provided with electromagnet, mounting plate one side is equipped with several electric telescopic handle, electromagnet one side both ends are connected with corresponding electric telescopic handle output end through support, connecting plate one side is equipped with blowpipe, and the one side of blowpipe is provided with several branch pipes;It can be more thoroughly cleaned to all non-raw material impurities in iron ore raw material, so that impurities and iron ore raw material are discharged from different discharge ports respectively, a large amount of dust on the surface of iron ore is cleaned during impurity removal process, iron ore raw material and impurities are more accurately distinguished, ore similar in appearance with iron ore raw material can be picked out, and the impurity removal effect is better.

The utility model relates to an automatic cleaning device for a circulating hot air filter screen of a high-performance carbon fiber oxidation furnace. The automatic cleaning device comprises an ash collecting box, an ash blowing pipe, a fixing head, a steel wire rolling brush, a bearing seat, a connector, an air pipe quick-plug connector, a driving device, a connecting plate, a plug and a fixing piece. According to the device, the synergistic effect of compressed air and mechanical ash removal is adopted, an adjustable bolt groove hole structure is arranged to achieve abrasion compensation of the steel wire rolling brush, a fixing piece and a plug are specially designed to ensure airtight connection, and dust collected in the ash removal process is discharged through a bottom flange opening. The device realizes automatic cleaning of the oxidation furnace filtering system, and has the characteristics of high ash cleaning efficiency, stable structure and convenience in maintenance.

The invention relates to the technical field of waste gas treatment, in particular to a self-maintenance type waste gas treatment system for stainless steel fastener production, the self-maintenance type waste gas treatment system comprises an outer shell and a damping support, and the interior of the outer shell is divided into an upper gas purification chamber and a lower waste gas chamber through a fixed partition plate. According to the self-maintenance type waste gas treatment system for stainless steel fastener production, the top closing cover plate is arranged at the opening position of the upper end of the outer shell, the electric control type top maintaining, disassembling and assembling system is installed on the top closing cover plate, and the opening of the upper end of the detachable filter bag module can be closed through the electric control type top maintaining, disassembling and assembling system; kinetic energy can be prevented from leaking upwards in the reverse blowing process, kinetic energy waste is avoided, and the dust removal effect is improved; and a traditional blowing pipe is integrated in the fixed partition plate, so that the space of the upper air purification cavity is not occupied, and the utilization rate of the internal space can be effectively increased.

The utility model relates to the technical field of purification and dust removal, and discloses a purification dust remover blowing pipe fixing device which comprises an upper fixing mechanism and a lower fixing mechanism, the lower fixing mechanism is in threaded connection with the bottom of the upper fixing mechanism, and the lower fixing mechanism comprises a limiting unit and a welding unit. The limiting unit is in threaded connection with the bottom of the upper fixing mechanism, and the welding unit is in threaded connection with the bottom of the limiting unit. After the blowing pipe fixing device for the purification dust remover is installed, the suspension distance of the blowing pipe can be shortened, the influence of bending, vibration, displacement and the like of compressed air on the blowing pipe during blowing is effectively avoided, the stability of the blowing pipe is improved, and after the blowing pipe fixing device is put into use, a nozzle of the blowing pipe is always located in the center of a filter bag; the service life and the blowing effect of the filter bag of the dust remover are ensured, through the design of the independent welding seat, only welding spots on the two sides of the welding seat need to be damaged when the device is overhauled, the clamped limiting mechanism cannot be damaged, and the utilization rate is increased.

The invention discloses a pulse dust collector for grinding calcium carbonate, and belongs to the technical field of dust removers, the pulse dust collector comprises a barrel, the side wall of the lower part of the barrel is connected with an air inlet pipe, the side wall of the upper part of the barrel is connected with an exhaust pipe, the inner side of the barrel is fixedly provided with a fixed partition plate, and the top of the barrel is fixedly provided with a cleaning fan; the exhaust end of the cleaning fan is fixedly connected with a blowing pipe through a pulse valve, dust removal cloth bags are uniformly and fixedly mounted on the fixed partition plate, a fixed lower seat is fixedly mounted on the fixed partition plate, spray heads are uniformly and rotatably mounted on the fixed lower seat, and a transmission assembly for driving the spray heads to rotate is arranged between the adjusting plate and the spray heads. According to the pulse dust collector for calcium carbonate grinding processing, auxiliary pressurization can be carried out on gas in the pulse later process, efficient blowing of the dust collection bag is achieved through the rotary spray head, meanwhile, the slapping mechanism is assisted, effective dust removal of the dust collection bag is achieved, and the efficient dust collection effect of equipment is ensured.

1. Name of the product in this design: Portable electric blowpipe stand. 2. Purpose of this design: It is used as a support for an electric wind instrument. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention discloses a device for measuring the roll diameter of an uncoiler head based on a laser rangefinder, belonging to the field of roll diameter measurement technology. The device includes an uncoiler, a lifting machine, an uncoil assembly, an automatic cleaning and detection assembly, and a roll diameter measurement and control system. The detection assembly integrates a laser rangefinder sensor and a blowpipe. The roll diameter measurement and control system includes a data acquisition module, a data analysis and processing module, and an execution control module. The data acquisition module completes multi-source data acquisition and analog-to-digital conversion. The data analysis and processing module performs data filtering, roll diameter calculation, and sensor contamination determination. The execution control module triggers automatic blowpipe cleaning, adjusts the tension and speed of the uncoiler in conjunction with the uncoiler, and coordinates the lifting machine's movement. The blowpipe can perform graded cleaning according to the contamination level. This device eliminates dust interference with detection, ensures stable roll diameter measurement data, and achieves automatic cleaning of the laser rangefinder sensor, constant tension closed-loop control of the uncoiler, and coordinated operation of the equipment.

The utility model provides a device for preventing a blast furnace tuyere blowpipe from sinking. The device for preventing the blast furnace tuyere blowpipe from sinking comprises a tuyere large sleeve, a tuyere medium sleeve, a tuyere small sleeve, a supporting boss, a mounting plate and a moving assembly, the tuyere medium sleeve is arranged at the rear end of the tuyere large sleeve, the tuyere small sleeve is arranged at the rear end of the tuyere medium sleeve, the supporting boss is arranged in the tuyere small sleeve, and the mounting plate is arranged in the tuyere small sleeve. The outer diameter of the supporting boss is matched with the inner diameter of the small tuyere sleeve, and the inner diameter of the supporting boss is matched with the outer diameter of a tuyere blowpipe. According to the device for preventing the blast furnace tuyere blowpipe from sinking, the tuyere blowpipe is not easy to sink when the blast furnace is in damping down due to the arrangement of each structure, so that the maintenance and repair period of workers on the blast furnace is prolonged, and the cost of the workers is reduced.

The invention relates to the technical field of conveyors, and discloses an air cushion conveyor which comprises a conveying cavity shell, a conveyor belt base and a floating air conveyor belt, and is characterized in that a sweeping mechanism for sweeping the interior is arranged in the conveying cavity shell, and a first fixing mechanism fixedly installed is arranged on one side of the interior of the conveying cavity shell; a second fixing mechanism fixedly installed is arranged on the other side of the interior of the conveying cavity shell, an arranged floating air conveying belt continues to blow upwards through an inserting groove opening, meanwhile, a lifting plate moves to the position above a lower sealing groove, a connecting pipeline channel is opened through a control valve, then a first rotating rod is driven to rotate through a connector, and the first rotating rod is driven to rotate; when a first rotating rod rotates, a moving block can be driven to move, and when the moving block moves, an arranged first gear can roll above a first toothed bar, so that an arranged rotating brush rotates to sweep and scrape impurities in the blowpipe into a connecting pipeline and finally convey the impurities into a conveying cavity shell.

The utility model belongs to the technical field of dust removal, and particularly relates to an ultra-clean filter cartridge dust removal device which is erected on a stand column and comprises a first shell, a second shell and a filter cartridge, the second shell is positioned below the first shell; a plurality of filter cartridges are arranged in the second shell, and differential pressure sensors are arranged on the filter cartridges; the tops of the filter cartridges are jointly connected with a blowing pipe, and the blowing pipe is connected with a compressed air storage tank; a pulse valve is arranged on a connecting pipeline of the compressed air storage tank and the blowing pipe; the third shell is located below the second shell, a dust-containing air inlet is formed in the side face of the third shell, and an airflow distribution device is arranged in the third shell; the fourth shell is located below the third shell, and an ash discharging valve is arranged at the bottom of the fourth shell. The utility model solves the problems of blockage, high energy consumption, frequent maintenance and the like in the traditional dust removal technology, and has a better market application prospect.

1. Name of the product in this design: Electric blowpipe sterilization box. 2. Purpose of this design: To disinfect electric blowpipes. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This utility model relates to a pneumatically driven fixed-point moving device, including a frame, limit switches, a guide tube, a sliding direction switch, a left driver, a fixed-point shifter, and a right driver. The limit switches are installed on the left and right sides of the frame's top beam. The two ends of the guide tube are fixedly connected to supporting columns. The sliding direction switch is installed inside the guide tube, and its two ends are elastically connected to the supporting columns. The travel direction of the fixed-point moving device is switched via the limit switches on the left and right sides. The left driver, fixed-point shifter, and right driver are all mounted on the guide tube. A reverse thrust tube is connected to the top of both the left and right drivers. A blowpipe is connected to the top of the fixed-point shifter, and the blowpipe is placed inside the reverse thrust tube. A spring is fitted onto the reverse thrust tube, with one end connected to the reverse thrust tube and the other end connected to the blowpipe. This fixed-point moving device has emergency braking and precise positioning functions, as well as autonomous reciprocating travel capabilities, exhibiting a high degree of intelligence.

The utility model discloses a combined dust removal and denitration device, which relates to the technical field of flue gas dust removal and comprises a support, the inner side wall of the support is fixedly connected with a bag type dust remover and a denitration furnace body, the inner side wall of the bag type dust remover is fixedly connected with uniformly distributed filter bags, a ventilation cavity is arranged in the bag type dust remover, and the denitration furnace body is arranged in the ventilation cavity. The side wall of the bracket is fixedly connected with a climbing frame, the surface of the climbing frame is fixedly connected with a compressed air tank, the outlet end of the compressed air tank is fixedly communicated with blowing pipes which are uniformly distributed, the outlet ends of the blowing pipes extend to the inlet ends of filter bags of the bag type dust collector, and the surfaces of the blowing pipes are fixedly connected with electromagnetic valves; according to the combined type dedusting and denitration device, dedusting and denitration technologies are effectively combined to form the combined type dedusting and denitration device, so that the overall efficiency of flue gas treatment can be remarkably improved, particulate matters and nitrogen oxides in flue gas can be removed at the same time, energy consumption and operation cost can be reduced, and increasingly strict environmental protection laws and regulations can be better met.

The utility model discloses a compressed air energy storage power station blowpipe closed type water circulation cooling device which comprises a blowpipe body, the bottom face of the blowpipe body is fixedly connected with a base, the upper surface of the blowpipe body is fixedly communicated with an exhaust port, the inner wall of the exhaust port is fixedly connected with a temperature sensor, and the temperature sensor is fixedly connected with the base. A cooling groove is formed in the inner wall of the blowpipe body. According to the device, through the synergistic effect of the cooling pipe and the heat exchanger, gas heat in the blowpipe body can be rapidly taken away, deformation and damage of the blowpipe and related equipment caused by high temperature are effectively avoided, the service life of the equipment is greatly prolonged, and meanwhile, by means of linkage of the temperature sensor and the controller, the service life is prolonged. The rotating speed of the circulating pump can be dynamically adjusted according to the gas temperature monitored in real time, accurate control over the circulating flow of the cooling liquid is achieved, flow is increased to strengthen cooling at the high temperature, flow is reduced to save energy when the temperature is close to the safe temperature, and energy waste caused by continuous high-flow operation of the cooling liquid is effectively avoided.

The invention discloses an air blocking valve with a double-limiting structure, a modularized air nozzle and a using method, and relates to the technical field of respiratory training equipment.The air blocking valve comprises a valve body shell, a valve element capable of axially moving and a bottom sealing cover, the valve element comprises an air leakage rod part, a fixing rod part and a valve head, and the bottom sealing cover is provided with a center guide hole; the first limiting structure is used for guiding the fixed rod part and limiting the opening stroke of the valve element; the air blocking valve is installed in a blowing pipe internally provided with an integrated limiting rib, a pressing cap with the outer diameter larger than that of a through hole of the limiting rib is installed on the extending air leakage rod part, a second limiting structure for preventing the air blocking valve from being integrally disengaged is formed, and the use method of multi-person hygiene sharing is further achieved through a detachable oral cavity connecting piece. The first limiting structure and the second limiting structure are arranged to form a double limiting and guiding structure, and the durability and operation reliability of the modular air tap can be effectively improved.

The utility model discloses a folding type electric blowing pipe structure which comprises an electric blowing pipe front part, an electric blowing pipe rear part and a connecting assembly, magnets and contacts are arranged on the connecting surfaces of the electric blowing pipe front part and the electric blowing pipe rear part, and adjacent side edges of the electric blowing pipe front part and the electric blowing pipe rear part are rotationally connected through the connecting assembly. Connecting surface magnets are arranged on the side surfaces of the electric blowing pipe front part and the electric blowing pipe rear part, the connecting surface magnets attract each other after the electric blowing pipe front part and the electric blowing pipe rear part are folded, and the contacts are contacted and electrified and the connecting surface magnets attract each other after the electric blowing pipe front part and the electric blowing pipe rear part are unfolded. The length of the foldable electric blowing pipe is halved after the foldable electric blowing pipe is folded, and the foldable connecting piece rotates smoothly, is attracted and fixed through the magnet after being folded, cannot be loosened and opened, and is convenient to carry and store.

The utility model discloses a training aid for improving lung function, which comprises a blowpipe, one end of the blowpipe is provided with an air blowing port, the other end of the blowpipe is provided with an air supply port, and the outer side of the blowpipe is provided with a small hole communicated with the inside of the blowpipe. The utility model provides a training aid for improving lung functions, and designs a lung function training aid with a blowpipe and small holes. According to the auxiliary device, the balloon is connected to one end of the blowing pipe, and the small hole is reserved in the side edge of the blowing pipe, so that accurate control over airflow is achieved; in the blowing process, a patient can adjust airflow by covering the small holes with fingers, and it is ensured that the balloon can be evenly and stably expanded; when the balloon is about to be full, the patient only needs to lightly release the fingers covering the small holes, the airflow can be smoothly released through the small holes, the phenomenon that the airflow directly impacts the face is avoided, and the training comfort is greatly improved.

The invention provides an electric blowpipe single-hand playing fingering system which comprises a pitch key group, an octave switching key group and a pitch control module, the pitch key group comprises at least nine pitch keys, and different pitch keys of the pitch key group are combined to form fingering corresponding to different fingers. The pitch control module corresponds to a pitch based on each fingering, and the octave switching key group is used for controlling the switching of octaves up and down of the pitch, so that the covered range reaches five octaves from Eb2 to C8 plus one plus six degrees.

The utility model discloses a glass product blowing shape control mold, and relates to the technical field of glass product blowing. The lifting device comprises a base plate, a lifting assembly is arranged on the upper surface of the base plate, the lifting assembly comprises a support connected to the upper surface of the base plate, a guide rail is arranged on the lower surface of the support, a ball nut is arranged in a sleeve seat movably connected in the guide rail, and a lead screw is arranged on the inner circumferential side of the ball nut. The two ends of the lead screw are rotationally connected with the upper surface of the support and the upper surface of the base plate correspondingly, damping bearings are in interference fit with the upper surfaces of the support and the base plate, and a connecting frame is connected to the outer side wall of the sleeve seat. And a translation assembly is arranged on the upper surface of the connecting frame. According to the utility model, the lifting component is arranged, so that the adjustment efficiency of the height of the blowpipe is accelerated, the blowing efficiency of glass products is improved, and the translation component is arranged, so that the step of adjusting the horizontal plane position of the blowpipe is simplified, and the operation amount of workers is reduced.

The utility model discloses a bagged material deashing device, which relates to the technical field of deashing equipment, and comprises a box body, a feed port and a discharge port are distributed at two ends of the box body, door curtains are fixedly connected to the feed port and the discharge port, and a conveying channel formed by a plurality of rectangular rollers is arranged between the feed port and the discharge port; a brush and a blowing pipe are fixedly connected in the box body, a photoelectric switch is arranged on one side of the conveying channel, the air inlet end of the blowing pipe is fixedly connected with an electromagnetic valve, and the photoelectric switch is used for detecting the existing state of bagged materials on the conveying channel and controlling the electromagnetic valve to be opened and closed according to the existing state. The bagged material ash removal device is good in ash removal effect and low in energy consumption; and meanwhile, the bagged materials can be leveled, so that subsequent stacking and transportation are facilitated.

The invention discloses a blowpipe air supply device for a glass forming furnace and integrated air supply equipment, and belongs to the technical field of design of air supply equipment for glass forming furnaces. The blowpipe air supply device comprises an air collecting pipe, an air outlet is formed in the wall face of the air collecting pipe and connected with a pressure reducing valve in a matched mode, the pressure reducing valve is connected with a flow meter through a pipeline, the flow meter is connected with one end of a hose, and the other end of the hose is arranged at a pipe opening of the forming furnace blowpipe. The integrated air supply equipment comprises a plurality of air collecting pipes which are fixedly connected to one end of a supporting plate and connected in a matched mode, and the supporting plate is connected with flow meters corresponding to air outlets working in the air collecting pipes in number. Each air outlet is provided with a pressure reducing valve, and each pressure reducing valve is connected with the corresponding flow meter through a respective air conveying pipe. Compared with a traditional distributed gas supply system, the number of pipeline connection nodes is reduced, the gas leakage risk is reduced, and meanwhile standardized production and on-site rapid installation of equipment are facilitated.

The invention relates to an electric blowing pipe with blowing flow regulation and drainage storage functions, and belongs to the field of electric blowing pipes. Comprising a blowing nozzle mechanism, a saliva storage box and an electric blowing pipe body, the blowing nozzle mechanism and the saliva storage box are installed at the two ends of the electric blowing pipe body respectively, an air guide pipe is arranged in the electric blowing pipe body, and the blowing nozzle mechanism and the saliva storage box are communicated with the two ends of the air guide pipe respectively; the blowing nozzle mechanism is provided with an adjusting piece used for adjusting the flow of gas entering the gas guide pipe. The blowing nozzle mechanism can receive liquid saliva which enters the air guide pipe from the blowing nozzle mechanism and is condensed in the air guide pipe, and the use comfort and experience of a player are improved.

The utility model relates to the field of plant ventilation, and discloses a steel structure plant ventilation mechanism which comprises first steel frameworks, a plurality of first steel frameworks are arranged side by side left and right to form a plant, a second steel framework is arranged on the right sides of the first steel frameworks and forms an office, a first fan is arranged on the left rear portion of the first steel frameworks, and a second fan is arranged on the right rear portion of the first steel frameworks. A first ventilation pipe is arranged on the rear side of the top of the first steel framework and extends leftwards and rightwards, the left end of the first ventilation pipe is fixedly communicated with the air outlet end of the first fan, the right end of the first ventilation pipe extends into the second steel framework, a branch pipe is arranged on the top of each first steel framework, and the branch pipes extend forwards and backwards. The rear end of the branch pipe is fixedly communicated with the first ventilation pipe, the front end of the branch pipe is closed, and the bottom of the branch pipe is fixedly communicated with a plurality of blowpipes which are distributed at equal intervals front and back. Through cooperative work of the first fan and the second fan, efficient air supply and air draft are achieved, and ventilation and renewal of air in the whole steel structure plant are guaranteed.

1. The name of the design product: sterilizer (blow pipe guard). 2. The use of the design product: the design product is used for musical instruments, ultraviolet disinfection of electric blowpipe. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model belongs to the technical field of automobile parts, and particularly relates to a strip-shaped blowpipe notching machine which comprises a working table and a machine frame arranged on the working table, at least two stations are arranged on the top face of the working table, each station is provided with a first positioning column and a second positioning column, and clamping cavities are formed in the tops of the first positioning columns and the tops of the second positioning columns. The rack is provided with a lifting air cylinder, an output shaft of the lifting air cylinder extends downwards and is connected with a cover plate, a first clamping block and a second clamping block which are meshed with the first positioning column and the second positioning column respectively are arranged at the bottom of the cover plate, and a guide rail is arranged on one side of the first positioning column and is in sliding connection with a first cutter. The top face of the first positioning column and the top face of the guide rail form an inclined observation face, a second driving air cylinder is arranged at the position, corresponding to the second positioning column, of the bottom face of the workbench, an output shaft of the second driving air cylinder extends upwards and is connected with a second cutter, the second cutter penetrates through the workbench in a sliding mode and extends upwards, and the guiding effect is achieved.

1. Name of the product in this design: Electric Blowpipe (AP-100). 2. Purpose of this design: for playing or performing music. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

The invention belongs to the technical field of electroslag remelting metallurgy, and relates to a shallow leveling control method for an electroslag molten metal pool. According to the invention, the electrode is optimized, the current density is controlled, the slag system components are optimized, and the injection pipe is arranged in the liquid slag pool and is used for stirring the liquid slag, so that the shallow leveling control of the electroslag metal liquid pool is realized. According to the method, crystals are promoted to grow in a finer mode, and the density and the mechanical property of the steel ingot are improved; the shallow and flattened molten pool is small in depth, the floating path of the inclusions is short, the convection of the molten pool is more stable and orderly, the retention of the inclusions caused by eddy current in the deep molten pool is reduced, the inclusions can be fully removed, the content of the inclusions in the steel is reduced, and the purity of the steel is improved; and the solidification process of the shallow leveling molten pool is uniformly propelled from the edge to the center, feeding is more sufficient, and the volume defects such as shrinkage cavities and looseness in the steel ingot can be effectively reduced.

There is provided a tuyere for a metallurgical furnace, the tuyere comprising a tapered hollow tuyere body having an inner surface and an outer surface, the tuyere extending along a first axis from an inlet end to an opposite outlet end, the tuyere body having a connection surface at the inlet end, the tuyere includes a connection surface configured to engage a nose portion of a blowpipe, the tuyere further including a sealing device disposed on the connection surface, the sealing device including at least an inner seal housed in an inner seal holder and an outer seal housed in an outer seal holder, the seals being disposed along the first axis, wherein the outer seal is a floating seal and the inner seal is a fixed seal, and wherein the outer seal is disposed closer to the tuyere inlet end than the inner seal.

The utility model provides a civil aviation seat lock connecting plate stamping die and cooling structure, which comprises a second template, the sides of a first template and the second template far away from each other are respectively provided with a mounting plate, and the top surface of the second template is sequentially provided with a bending forming cavity, a shearing opening, a second punching hole and a first punching hole. A first punch, a second punch, a punching cutter and a bending pressure head which respectively correspond to the bending forming cavity, the shearing opening, the second punching hole and the first punching hole are arranged below the first template; the cooling device comprises a mounting base, and a blowpipe is arranged on one side of the mounting base in parallel. When the plate bending and forming device is used, the first die plate descends, the shearing opening is matched with the punching tool to cut off a plate, the first punch and the second punch punch the plate, then the plate is continuously fed towards the direction of the blocking seat, the bending pressing head and the bending forming cavity are matched to press and form the plate, the production process is continuous, and the production efficiency is improved. The production efficiency is high.