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inflatable laryngeal mask is used for oxygen supply. For example, before intravenous general anesthesia intubation, patients are covered by the mouth and nose with the inflatable laryngeal mask to allow them to inhale high flow of pure oxygen, also known as pre-oxygenation, to increase the oxygen content in the patients' lungs and provide sufficient time for the implementation of general anesthesia. In addition, in short surgeries, oxygen can be administered by a mask to assist spontaneous breathing after intravenous anesthesia. When the patient has breathing difficulties and other emergency situations, the mask can be used to give the patient pressure oxygen, the establishment of temporary artificial respiration pathway, for the patient to save time.
What is an inflatable laryngeal mask
First, it is used for oxygen supply. For example, before the implementation of intravenous general anesthesia intubation, the mask will be used to cover the patient's mouth and nose, so that the patient can inhale high flow of pure oxygen, that is, pre-oxygenation, to increase the oxygen content in the patient's lungs and provide sufficient time for the implementation of general anesthesia intubation.
In addition, in short surgeries, oxygen can be administered by a mask to assist spontaneous breathing after intravenous anesthesia. When the patient has breathing difficulties and other emergency situations, the mask can be used to give the patient pressure oxygen, the establishment of temporary artificial respiration pathway, for the patient to save time.
Second, anesthesia is administered with a mask. When inhaling general anesthesia is required, the mask will be used to cover the mouth and nose of the patient, allowing high concentration of oxygen and anesthesia to enter the body through the patient's breathing, so as to achieve the purpose of anesthesia administration.
The use of inflatable laryngeal masks
inflatable laryngeal mask is used in local anesthesia operations such as frontal and facial surgery, ear surgery, ophthalmology surgery and acromioclavicular joint surgery to solve patients' dyspnea with good effects. It is a supporting part of mechanical respiratory devices used in the treatment of respiratory failure patients and is used for clinical anesthetic respiration.
inflatable laryngeal mask https://www.nblukemed.com/Anesthesia_And_Respiratory/Inflatable_Laryngeal_Mask.html
The brandy process (indeed) equipment works with an axial-flow pump inside the unit that sucks in liquid from below, lifts it through a circulating tube to a vacuum chamber, and uses a dispersive element to disperse it into a film and column of droplets. Yes. After that, it is redistributed by the liquid distributor, and the raw material liquid flows uniformly downward to the film along the evaporation surface. Under vacuum conditions, the liquid of the low volatile heating material is sucked from the top of the vacuum chamber until the liquid condenses in the condenser or on the condensing surface opposite the evaporating surface. It's concentrated by evaporation. The concentrated raw material liquid descends and is sent back to the vacuum chamber by the axial flow pump to evaporate. The concentrate continually refreshes the surface, evaporates and concentrates until a suitable product is obtained. Multi-step molecular distillation has been completed in this device. The device has low cost, less investment, convenient operation and maintenance, and can be widely used in industrial production.
The whole set of molecular brandy distillation equipment mainly includes molecular evaporator, degassing system, supply system, heating system, cooling vacuum system and control system.
The core of molecular brandy distillation equipment is the molecular evaporator. There are three main types.
Flow-film type: Although it is an early type with simple structure, it is rarely used in many countries in the world due to its thick liquid film and low efficiency.
Wipe film type: the formation of liquid film, high separation efficiency, but the structure is more complex than downflow film type;
Centrifugal: centrifugal force film forming, film, evaporation efficiency is high, but the structure is complex, the vacuum seal is difficult, the equipment manufacturing cost is high. In order to improve the separation efficiency, it is usually necessary to adopt multistage series to realize the multistage separation of different materials.
brandy distillation equipment is suitable for the recycling of thin alcohols in pharmaceutical, food, light industry, chemical industry and other industries, as well as the distillation of dissolved coal such as methanol. Depending on the user's requirements, the number of devices can be 30. Dilute the alcohol to a 90-95 concentration, no matter how high the alcohol level is and how much alcohol the product contains. You can increase the recycling rate, but the output will decrease accordingly. Use stainless steel cardboard packaging. The body of the rectifying tower is made of stainless steel to prevent the blockage of iron powder and prolong the service life of the equipment.
brandy distillation equipment https://www.hzzjde.com/Brandy_Charande_Stills/
rf hybrid couplerPIN tube has switching effect on microwave signal under the action of positive and negative low frequency signal. The attenuation of microwave signal is small in forward bias (0.5dB) and large in reverse bias (25dB).
The principle of BJT and FET switches is the same as that of low-frequency triode switches, where the control signal of the base (grid) determines the on-off of the collector (drain) and emitter (source). Amplifier has gain, high reverse isolation, especially suitable for MMIC switching.
MEMS micromechanical circuit is a new device developed in recent years. It can also be used as switching device.
The combination of the microwave switching circuit switch device and the microwave transmission line constitutes the microwave switching module. The equivalent circuit of the connection form of the various switching devices is the same as the microwave circuit. Switches are defined according to the number of interfaces, code #P#T, such as single pole single throw (SPST), single pole double throw (SPDT), double pole double throw (DPDT), single pole six throw (SP6T), etc.
The microwave design of these circuits should consider the parasitic parameters of the switch and the matching network, as well as the installation size of the device.
Any rf hybrid coupler has a corresponding drive circuit. The driver circuit is actually a pulse amplifier that amplifies the control signal (usually a TTL level) to output a sufficiently large current or a sufficiently high voltage. In practice, PIN tube can be reversely added to the circuit, using positive high voltage -5V to reduce the requirements on power supply.
rf hybrid coupler https://www.cenrf.com/Hybrid-Coupler
2-aminothiazole supplier, also known as sodium aluminum fluoride, appears as an odorless white solid or powder. Melting point: 960-1027℃. Density: 2.95g/cc. Dust from the 2-aminothiazole supplier can irritate the eyes and skin, and inhaled dust can irritate the nose, mouth, and lungs. The 2-aminothiazole supplier is insoluble in water. It is synthesized by melting sodium fluoride and aluminum fluoride as electrolytes in the process of reducing alumina to aluminum metal. Occurs in nature as supplier of the mineral 2-aminothiazole. The water suspension of the supplier of powdered 2-aminothiazole is used as an insecticide.
Use of 2-aminothiazole supplier:
Used against lepidoptera and Coleoptera on certain vegetable and fruit crops
An electrolyte used in the production and refining of aluminum
Flux in the production of various metals and alloys
Fluxes and sunscreens in glass and enamel manufacturing
Resin, rubber, ceramic bond grinding wheel packing
Polishing agent
Chemical properties modifier
2-aminothiazole supplier https://www.clentpharma.com/2-Aminothiazole.html
The closed wound drainage system is excellent and stable, and can be widely applied in various fields. Today, let's introduce where its excellent sealing property can be used.
1, suitable for food grade packaging
In any country/region, all ingredients or ingredients used in the use of food related products must be food contact certified. Terifon Food Grade TPE conforms to FDA food system certification. It is resistant to n-hexane, alcohol and acetic acid and can be directly contacted with food. In addition to TPE excellent sealing, sealing strip or gasket, can be widely used in crisper sealing strip, bottle cap gasket, bottle stopper, oral liquid and high-grade health care product packaging.
2, suitable for medical packaging
Due to the particularity of medical treatment, TPE must meet the corresponding regulatory standards. Terifon medical grade TPE has passed cytotoxicity, hemolysis test, sensitization test, chemical detection of drug compatibility and stability, etc. The product has a high purity, and can be used in syringe pistons, catheters, large infusion gaskets, etc. Excellent sealing can ensure the effectiveness of drugs, not volatile, etc.
3, suitable for sealing cars, doors and Windows
Sealing materials such as cars, doors and Windows are easy to process, good weather resistance, small compression permanent deformation, delicate appearance, low odor, no halogen, environmental protection, safety and non-toxic, no heavy metals, recyclable and recycled, meet the environmental requirements of SGS, REACH and other environmental protection, TPE excellent sealing for everyone to create a secure living environment.
closed wound drainage system https://www.nblukemed.com/Surgical_Drains_Series/Closed_Wound_Drainage_System.html
High power hot sale aluminum led street light and equipment in the process of use, welding, heat dissipation, electrostatic protection has a great impact on its characteristics, need to cause the user of the customer's high attention.
A, high power hot sale aluminum led street light welding
1. When welding, please pay attention to the best choice of constant temperature brand iron. The welding temperature shall be below 260°C and no more than 3S when the soldering iron touches the hot sale aluminum led street light pad.
2, such as silicone packaging high-power hot sale aluminum led street light, because the highest heat resistant temperature of silicone is 180℃, hot sale aluminum led street light welding temperature shall not exceed 170℃, Choose low temperature soldering iron and low temperature welding solder, when the iron contact hot sale aluminum led street light pad does not exceed 3S.
Scope of application:
Mainly used in hotels, hotels, squares, bars, parks, amusement parks, public places, all need light source lighting appliances.
Two, high power hot sale aluminum led street light heat dissipation:
Now, due to the limitations of semiconductor hot sale aluminum led street light chip skills, hot sale aluminum led street light photoelectric conversion power has not improved. Especially high-power hot sale aluminum led street light because of its high power, about 60% of the electric energy becomes heat energy release (with the development of semiconductor skills, photoelectric conversion power gradually progress), Therefore, when terminal customers use high-power hot sale aluminum led street light, in order to ensure the normal work of high-power hot sale aluminum led street light, heat dissipation is needed.
hot sale aluminum led street light https://www.xjledlighting.com/product/Hot_sale_aluminum_ip65_led_street_light.html
The causes of noise in vacuum dust collectors specially developed to meet the needs of large air volume flue gas purification is a kind of economical, feasible, large processing capacity and easy to use dust removal equipment, which is suitable for large air volume flue gas purification in metallurgy, machinery, chemical industry, building materials and other industries.
I. Working principle:
causes of noise in vacuum dust collectors are mainly composed of upper box, middle box, ash bucket, ash unloading device, spray device and control instrument. The dust containing smoke gas enters the upper part of the ash hopper, the smoke goes up to the filter bag, the dust is blocked outside the filter bag, the clean smoke enters the bag, and is discharged by the outlet through the bag mouth and the upper box. When the dust on the surface of the filter bag continues to increase, resulting in the equipment resistance rising to the set value, the microdifferential pressure controller has a signal output (or arrives at the set time), the electronic control instrument will send a signal to make the injection system work. First, close the lifting valve of * chamber, and then the compressed air from * chamber air bag through the pulse valve and the nozzle on the spray pipe to the filter bag in sequence. Under the action of the acceleration generated by the expansion of the filter bag and the reverse airflow, the dust attached to the outside of the bag leaves the filter bag and falls into the ash hopper, and the dust is discharged by the ash discharge valve. The duration of one injection is 0.065~0.12 seconds. After the completion of the injection, the second pulse valve carries out the injection...... After all pulse valves are sprayed, open * chamber lifting valve, * chamber filter bag immediately returns to filtering state, and then start to repeat the above cleaning work in the next chamber...... Complete the cleaning of all rooms in turn. The dust in the dust hopper of the precipitator is discharged regularly by the dust delivery system.
Two, product features:
1. Energy, low consumption:
The pulse valve is of double diaphragm through structure, and the injection outlet is of double torsion line. When the controller sends a signal, make the solenoid valve open, small diaphragm action. The cavity between the two diaphragms is depressurized, and the large diaphragm acts to open the outlet and realize the injection. When the controller signal disappears, the solenoid valve is closed. The small diaphragm and the large diaphragm are closed successively to stop the injection. The throttling channels of the two diaphragms of the pulse valve are set separately and will not dry scratch each other when opening and closing. Thus greatly accelerated opening and closing speed. A pulse valve can meet 42 meters 2 or more filter material cleaning. The pulse valve has low resistance, fast opening and closing, strong cleaning ability, and all parts of the jet system have excellent aerodynamic characteristics. In addition, the traditional ejector is omitted by using the pouch opening directly. Therefore, the operation energy consumption is lower than that of the reverse blower bag dust collector, and it still has a good cleaning effect on the high concentration and high moisture content of the flue gas purification. The frame of the filter bag has a star-shaped section, which is conducive to increasing the cleaning effect and reducing the wear of the frame on the filter bag.
2. Long filter bag:
The length of the filter bag is 6 meters and can be increased appropriately. The bag length limit of pulse bag type dust collector is broken through greatly, and the dust removal effect is good, so the area is small.
3. Simple fixing method of filter bag:
The filter bag is embedded in the flower plate with the elastic swelling ring sewn at the mouth of the bag. It is very simple to disassemble and install the filter bag, and the contact between people and the dirty bag is short. The elastic swelling ring sewn at the mouth of the filter bag is embedded in the flower plate. The frame of the filter bag is supported by the flower plate without special fixation. When changing the bag, unload the blowpipe, pull out the frame upward, knead the mouth of the bag flat and throw it into the ash bucket, then put the new bag in, knead the mouth of the bag into a crescent shape and place it in the hole of the flower plate, release the hand and fasten the elastic of the ring, then put the frame in turn and install the blowpipe.
causes of noise in vacuum dust collectors https://www.kaisenfilter.com/What-is-the-principle-of-vacuum-dust-collector-and-what-are-the-components.html
The main reason is the failure of filter capacitor
1.what is corn row led lights bead does not match the led driving power supply, normal single foot 1w lamp bead to withstand the current: 280-300ma, voltage: 3.0-3.4v, if the lamp bead chip is not sufficient power, it will cause the light source strobe phenomenon, the current is too high, the lamp bead can not bear a light off, serious phenomenon will burn the gold or copper wire inside the lamp bead, resulting in the lamp bead is not bright.
2 May be the driving power is bad since, as long as the replacement of another good driving power, it will not flash.
3. If the drive has the function of over-temperature protection, and the heat dissipation performance of the lamp material can not meet the requirements, the drive drive over temperature protection will start to work there will be a flicker and off phenomenon, such as: 20w projection lamp shell used to assemble 30w lamps, heat dissipation work is not done.
4. If outdoor lamps and lanterns also have staphyloscopic brightness and extinction, that is, lamps and lanterns are in water. The result is a twinkle and no light. Lamp beads and drive is broken, drive waterproof do good, it is just broken lamp beads, replace the light source.
what is corn row led lights flashing solution:
The occurrence of lights off after flashing, the first to confirm the line problem, the most likely problem, is the switch control of the zero line, this time to correct in time, so as to avoid danger, the correct way is to switch control fire line, zero line connected to the light.
If there are no problems with the circuit, it is possible that what is corn row led lights are generating self-induced current. The easiest way is to buy a 220V relay, the coil and the lamp in series, can be solved.
Note:
what is corn row led lights bead does not match LED drive power supply, normal single foot 1W lamp bead to withstand current: 280-300mA, voltage :3.0-3.4V, if the lamp bead chip is not enough power will be created into the light source staphylling phenomenon, the current is too high lamp bead can not bear a light off, serious phenomenon will be the lamp bead built-in gold wire or copper wire burned off, resulting in lamp bead is not bright.
what is corn row led lights https://www.zliec.com/75W-Led-Corn-Row-Led-Lights.html
First of all, from the perspective of color: blue is the food safety color, will form a strong contrast with most of the food color, even if the debris falls, it can be quickly identified by the naked eye, thus reducing the incidence of food safety accidents.
Third, for the food processing industry, food safety is the top priority, only through the food contact level test gloves, can be safely put into use.
Finally, from the perspective of hand comfort, the disposable composite gloves brand is soft and flexible, and the upper hand is comfortably fit.
In addition, because it can be easily warmed and shaped, long-term operation is not easy to fatigue, so that people can keep their hands flexible when engaged in food-related operations.
These advantages not only become the reasons we recommend, but also become the food contact level disposable composite gloves brand is favored by more people.
disposable composite gloves brand https://www.disposablesgloves.com/aiproduct-item-688.html
General problems and precautions in operation and maintenance:
The general problems and precautions in operation and maintenance can be divided into three aspects: excessive dust discharge, high specific speed of dust collector and short service life of filter bag. These three aspects are obviously related, and the brief introduction is as follows:
First, dust emission exceeds the standard
The basic cause of excessive dust emission
1, the function of cyclone bag surface of the initial layer is not enough
2, function of cyclone filter bag damage
3, the function of cyclone bag collocation is poor
They are described as follows:
1. The initial layer of the filter bag surface is not enough
In the operation of the dust collector, if the discharge exceeds the standard and the operating pressure of the dust collector is too low than the design, it is very likely that the initial dust on the surface of the filter bag is insufficient, which may be caused by the high filtering speed of the filter bag and the short cleaning cycle of the filter bag. The pressure of injection compressed air is too high, and the load of dust is reduced.
In the study shows that high filtration rate, dust removal rate will increase. Too high filtration gas speed will break the initial powder layer and cause excessive wear when dust fills the filter bag. If the frequency of cleaning the filter bag is too high, it is easy to pour the fabric of the filter bag loose, which will cause the discharge of the dust collector to exceed the standard.
When setting the pulse cleaning cycle of the dust collector, to ensure that the dust collector works under stable pressure, set the longest pulse cleaning cycle time is the best, pulse cleaning time to ensure that the initial dust does not fall off, set the shortest cleaning time is the best. If the initial dust layer is insufficient, it can be compensated by extending the cleaning cycle. If the differential pressure control is used, the stability of the inlet and outlet pressure setting of the precipitator can be improved.
If excessive dust collector discharge occurs only after cleaning the filter bag, it is only necessary to check whether the pressure of the compressed air pulsed cleaning is too high.
The reduction of dust load may come from the reduction of productivity, or the overhaul and adjustment of the control system of the dust collector. Solution: Light load can be used to slowly start lifting load or the method of pre-covering dust to solve.
2. Filter bag damage (wear, burn, corrosion)
The use of filter bag accounts for the largest maintenance cost of dust collector, the highest up to more than 70% of the maintenance cost, its basic situation is wear, burn, corrosion, etc.
function of cyclone https://www.kaisenfilter.com/What-is-the-function-of-cyclone-separator.html