Ultrasonic Scaler an ultrasonic instrument with a tip for supplying high-frequency vibrations, used to remove plaque and calculus from teeth and bits of inflamed tissue from the walls of the gingival crevice.
Ultrasonic Scaler Advantages
Ultrasonic Scaler Dental Ultrasonic Scaler, Ultrasonic Tooth Scaler, Piezo Ultrasonic Scaler, Ultrasonic Scaler Dental SoFine & CNC Holding Group , http://www.medical-instruments-mould.com
Introduction The main equipment is fire-fighting pumps, water tanks, foam mixing systems, foam guns, guns and other fire-fighting equipment that can independently save fires. It is especially suitable for fighting oil fires such as oil, and it can also provide water and foam mixture to fire sites. It is a necessary fire protection for petrochemical companies, oil terminals, airports and cities.
The composition of the foam fire truck foam fire truck special parts from the tank, pump room, equipment box, power output and transmission systems, piping systems, electrical systems and other components. Foam fire engines are suitable for urban public security fire brigades, petrochemicals, factories and mines, forests, ports, and docks. Foam fire trucks Fire equipment Conventional equipment: fire hose (diameter 10 cm, 4 meters long) × 2 water filters × 1 piece, fire hose (diameter 6.5 cm, 20 meters long: diameter 8.5 cm, 20 meters long ) × 2 roots, hose hooks × 4 pieces, hose bags × 4 pieces, reducer interface (diameter 6.5-8.5 cm) × 2 sets, the same type of interface × 1 sets, DC water gun (diameter 6.5 cm) × 1 set , Flowering squirt × 1 set, DC switch water gun × 1 set, sheep rake × 1 handle, ground wrench × 1 handle, waist axe × 1 handle, fire axe × 1 handle, shovel × 1 handle, 撬扛 × 1 handle. Fire truck equipment classification: Fire fighting equipment: air bubble gun, water gun, fire hose, water filter, water separator, fire hose, hose hook, hose cloth, reducer interface Water guns, DC switch water guns, yokes, ground wrenches, suction pipe wrenches, belt guards, mixer pipettes, waist axes, fire axe, shovels, files.
On the top of the cab of the fire engine electrical system is a long row of pure red lights. There are strobe lights above the sides of the vehicle, safety sign lights and side retro-reflectors (combined) are installed below, with front and rear profile lights, a turn signal lamp on both sides, passenger compartment, equipment box, pump room All are equipped with lighting, and meet the requirements of GB4785. The siren power is 100W; the siren, warning light and strobe light circuit are independent additional circuits and the control device is installed in the cab. Additional meters and switches are centrally located on the control panel for ease of operation. The instrument panel is equipped with: vacuum gauge, pump water, low pressure gauge; fire pump tachometer; liquid level indicator device; pump room and equipment box light switch.
Fire truck technical requirements All operating switches, meters, equipment racks and vehicles have the nameplate signs that meet the specifications; The vehicle performance meets the requirements of GB7956 "Fire Truck Performance Requirements and Test Methods"; Liquid tank quality meets GA39.5-92 requirements; The appearance of the vehicle is beautiful and generous, and the flatness conforms to GA39.5-92; All bonding is smooth and firm, in line with corporate standards. All welding is firm and smooth after welding.
The domestic mainstream foam fire trucks are currently the domestic foam fire trucks, with Dongfeng, Liberation, CNHTC, Qingling and other chassis as the main carriers. [1] The tonnage is mainly divided into the following types: 1. Dongfeng Duolika foam fire truck, 2 tons of water, 1 ton of foam; 5. Dongfeng 140 foam fire truck, filled with 2.5 tons of water, 1 ton of foam; 6. Dongfeng 145 foam fire truck, 4 tons of water, 1 ton of foam; 7. Dongfeng 153 foam fire truck, 5 tons of water, 1 ton of foam; 8. Heavy truck Hao Wo single-bridge foam fire truck, filled with 6 tons of water, 2 tons of foam; 9. Heavy truck Haowo Shuangqiao Foam fire truck, 12 tons of water, 3 tons of foam; 10. Big Isuzu Foam fire truck, 5 tons of water, 1 ton of foam; 11. Big Isuzu Shuangqiao Foam [2] Fire truck, 12 tons of water, 3 tons of foam.
How to use foam fire engines Foam fire engines (gun vehicles) are necessary equipment for fighting fires in oil, chemicals, factories and mines, and port cargo yards. Because it also has the performance of a tank fire truck, proper use of a foam fire engine is a matter worthy of attention for every fire commander. Due to the special performance of foam fire trucks, it is determined that most of the fires faced by such fire engines are petrochemicals and other dangerous fire sites. Such fires have the characteristics of high burning speed, many changes in the fire conditions, high probability of explosive combustion, and large threats to fire engines and combat personnel. Therefore, in order for the foam fire truck to reach a favorable position on the fire, it can quickly start fire fighting. Must pay attention to the following points: 1. The foam fire truck should face the fire on the side and back, and quickly water, increase to the appropriate pressure (for Dongfeng fire engine, for example, the pressure when using the PQ8 gun is ≥0.686MP, the pressure when the car gun is used is ≥0.785MP) , Open the pressure water cock, then open the bubble tank outlet ball valve, adjust the mixer to the proper position, aim at the center of the flame and spray the foam liquid. 2. When the use of foam guns for close combat, fire engines should be provided with necessary protection according to the fire situation. The body can be covered with asbestos cloth and covered with water mist when needed. 3. During the entire fire fighting process, the driver must stick to his position and pay constant attention to the immediate remaining amount of the foam liquid in the vehicle, and add foam liquid in time. Once the foam liquid is used up and refilled, it will inevitably affect the entire fire fighting action. [3] Foam fire truck maintenance: Foam fire truck [4] is a special vehicle. It is designed and manufactured as a special vehicle suitable for firefighters to use and equip various types of fire-fighting equipment or fire extinguishing agents according to the needs of fire fighting and rescue. . During the use of fire trucks, due to friction, vibration, shock and natural conditions, and other operating conditions, all parts and components will have varying degrees of looseness, deformation, wear, corrosion and damage. As the mileage increases, the condition of the vehicle gradually deteriorates, and the failure rate increases. This will also lead to a reduction in power, economy, and safety and reliability, and even unexpected mechanical accidents or traffic accidents. At present, the fire brigade driver team is characterized by uneven technology, short driving experience, lack of knowledge about machinery, and heavy driving and light maintenance. Therefore, the daily maintenance and maintenance of fire engines is an urgent task. In the actual work to do a good job in the maintenance of fire engines should pay attention to the following points: First, the condition check and maintenance. The condition of the vehicle directly affects the success or failure of the fire fighting operation and the life safety of the combatants. The main contents of the condition check include: if the bolts on the transmission system such as the clutch, transmission, transmission shaft, universal joint, reducer, differential, and axle, etc. are loose and damaged, the oil is lacking; the brake is applied to the brake pedal. Flexibility, working conditions of air compressors, whether the air reservoir is in good condition, brake valves are flexible, and the brake pads of the wheels are worn; the operation of the steering wheel is normal and the working status of important components such as lights, wipers, brake lights, etc. Check out the faults should be promptly removed, such as the clutch is not separated, should promptly repair and adjust the drive shaft, universal joints, reducer, differential, loose shaft bolts, oil shortage, timely tightening and lubrication. Second, the fire tank inspection and maintenance. Because the fire tanker is in a state of full load of extinguishing agent for a long time, the extinguishing agent's soaking will cause certain corrosion to the tank. Especially for some long-serving fire engines, if they cannot be checked and maintained in time, the rust point will expand or even cause rust to wear. In the tank, its detached rust residue will be flushed into the pump when the fire truck is out of the water, and damage to the impeller will cause the pump not to work properly. In particular, foam tanks for foam fire trucks have large corrosive foams. If they are not regularly inspected and maintained, not only will the tanks be easily rusted, but also the pipes will be blocked and the foam liquid will not be delivered properly, causing the failure of fire fighting and rescue operations. . Therefore, the fire tank should be regularly inspected. Once rust is found, effective measures should be taken to prevent the rust from expanding. The commonly used treatment method is to clean the rusted part, dry it, coat it with epoxy paint or repair it. All other parts of the valve and piping related to the holding tank should also be checked and cleaned periodically, and the problems should be found and handled accordingly. Third, equipment box inspection and maintenance. The equipment box is mainly used for storing fire-fighting and rescue equipment. It is the most commonly used and most easily overlooked area. The quality of the equipment box will affect the service life of the equipment. First, use rubber or other soft materials to isolate or protect the friction equipment. Secondly, always check whether there is water accumulation in the equipment box, whether the fixing bracket is firm, whether the curtain door is flexible, whether it is deformed or damaged, whether the oil in the oil bath is in the door or not, and if necessary, grease is added. protection. Fourth, the inspection and maintenance of fire pumps. The fire pump is the "heart" part of the fire engine. Fire pump maintenance directly affects the effectiveness of fire fighting operations. Therefore, in the inspection and maintenance of the fire pump process should be carefully and found that the fault should be promptly removed. Generally, the fire pump must be filled with grease once every 3 to 6 hours. Regularly test the main technical parameters such as the maximum water absorption depth, water diversion time, and maximum flow rate of the fire pump. If there is a large difference from the normal performance, check and eliminate it. During inspection and maintenance, attention should be paid to the following: If unclean sources of water are used, the pumps, water tanks, and pipelines should be cleaned; after the foam is used, the pumps, foam proportioners, and connecting lines must be cleaned in time; , pipeline memory water; water ring pump cistern, scraper pump storage tank, water tank, foam tank reserves must be filled; check the water gun or foam gun ball valve base, clean the active part of the appropriate lubrication to lubricate; The oil in the pump and gearbox is checked in a timely manner. If the oil deteriorates (the oil turns milky) or is missing, it should be replaced or supplemented in time. Fifth, electrical appliances, instrument inspection and maintenance. Suitable fuses should be selected for the electrical circuits of vehicles so as not to damage the original electrical components. The lights and alarm systems should be regularly checked to see if they work properly. If there are any exceptions, they should be promptly corrected. The contents of the inspection of the electrical system of the water system and the lighting system include: equipment box lights, pump room lights, solenoid valves, liquid level indicators, and digital tachometers, as well as working conditions such as tables and switches. The correct operation and rational use of fire-fighting vehicles and various special fire-fighting equipment and equipment are important links for giving full play to the functions of fire engines, rapid completion of firefighting fighting and rescue missions. As the saying goes, “a thousand days of military service and one-hundred-thousand-time service†are used. Only routine maintenance of fire-fighting vehicles can be performed on a case-by-case basis to ensure the successful completion of firefighting fighting and rescue missions!
How It Works
The scaling tip vibrates and follows a pattern depending on power rating and type - elliptical, curved linear or figure of 8. The water is energised as it passes over the tip to provide cavitation, which results in a scouring action. Because of the heat generated at the tip, it is essential to keep the tip moving over the teeth.
A good guide is that one should not spend more than 10 seconds on any individual tooth and never to press harder than one ounce of pressure. Pressing hard stops the tip from vibrating and reduces the effectiveness of the tip to that of a hand scaler. It also concentrates heat in one area with possibly lethal consequences for the pulp. Best practice involves selecting a group of three of four teeth and scaling them in sequence to prevent over-heating any one tooth.
Subgingival work is possible with the correct type of insert (e.g. Focus Spray Insert (FSI), Slimline or Through Flow Insert (TFI)).
Ultrasonic Scaler Disadvantages
Iatrogenic heat damage to the tooth is possible if not used carefully.
Standard beavertail shape tips cannot be used subgingivally. For subgingival use, FSI, TFI or Slimline inserts are required.
Handpieces can heat up considerably during long scaling procedures, if water pressure is not consistent. Garden water bottle reservoirs generally fail to provide a consistent and useful level of water pressure. If an Air Compressor is available, plumbing the unit in provides a better result.
Foam fire truck
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