Yingmed offers a large selection of Disposable Gynecological Examination products such as Vaginal Speculum, Cervical Rambrush, Cervical Scraper. With HCG test Stick or HCG test pen, women will easily know herself whether pregnant. Combined with HCG tester, you also can find HCG test strip in Yingmed.
Disposable Gynecological Examination Disposable Gynecological Examination,Cervical Exam,Gynecological Examination,Gynecologist Exam NINGBO YINGMED MEDICAL INSTRUMENTS CO.,LTD , http://www.chinayingmed.com
Simple carburetor construction and troubleshooting
A composition carburetor consists of a nozzle, a metering hole, a mixing chamber, a float chamber, a needle valve, a float, a helium tube, and a throttle valve. Second, the working principle of gasoline from the fuel tank into the float chamber, the height of the oil level is controlled by the float. When the oil level is high, the float floats and the needle valve closes the oil inlet. When the oil level is low, the float sinks the needle valve to open the oil inlet. There is a vent hole in the float chamber, so that the pressure of the oil level of the engine during operation is greater than the pressure at the throat. One end of the nozzle is in the lower part of the float chamber. The end of the nozzle is equipped with an oil inlet hole, and the other end is at the narrowest part of the throat. When the engine is working, the air flow at the throat is accelerated, the pressure is reduced, vacuum is formed, and the fuel is sprayed. The tube is sucked out. Three characteristics of the work characteristics of simple carburetor carburetor operating characteristics are: when the engine speed is constant, the concentration of combustible mixture with the throttle opening changes, the throttle gradually increased from small, gradually increasing the concentration of the mixture from lean, and concentrated At a certain point, the throttling effect of the measuring hole no longer becomes thicker. Some common failures of four-stroke engines, and methods of elimination and prevention. The engine mainly prevents the cylinder from being pulled. On the one hand, the engine oil will enter the fuel chamber, causing excessive carbon deposition and affecting the normal combustion of the fuel. On the other hand, the combustible mixture will enter the crankcase and dilute the engine oil, affecting the engine. The normal lubrication reduces the power of the engine and increases fuel and engine oil consumption. Causes of engine cylinder strains are: Long-term engine overload, lack of engine oil, or impurities in the engine oil. The gap between the piston and the cylinder is improper, the piston ring is broken, and the piston ring is stuck in the piston groove. The piston pin snap ring comes out and the piston pin is pulled out. Dirty cylinders are created between the piston and the cylinder wall. Engine common troubleshooting: (a): can not start 1, improper operation method: When starting, close the choke door is too long, resulting in too much gas in the cylinder, the spark plug short circuit, can not start. Found this phenomenon, you should open the choke door, open the spark plug hole, pull the engine, drain the cylinder of gasoline, then install the baked spark plug, start the machine. 2, no oil: Remove the spark plug inspection, if you find the spark plug dry no gasoline smell, turn the engine, the gas discharged from the spark plug hole no gasoline smell, then there is no gas in the gas mixture into the cylinder. Check whether the tank switch, tubing, and carburetor are unimpeded one by one. After troubleshooting, start the machine. 3, gasoline into the cylinder: Open the oil tank to check if there is a petrol smell, indicating that gasoline into the tank. It may be that the machine has been inverted for too long. Just clean the cylinder and change the oil. After the above checks, if there is still gasoline into the engine tank, it may be that the carburetor cannot hold the oil, and the carburetor needle valve or the spring needs to be replaced. 4, air filter plug: Remove the spark plug, found that there are many above the gasoline, in addition to the reason the damper did not open, the air filter may be a serious blockage, the air filter should be cleaned. 5, spark plug failure: Spark plug too much carbon, severe ablation and short circuit failure will affect the engine start and normal work, this situation must replace the spark plug. (II) Difficulties in starting: 1. Improper operation: When starting, the correct operation method is not performed. For example, when the cold car starts, there is no small damper, so that the mixture gas entering the cylinder is too thin to reach the mixture needed for combustion. ratio. 2. Failure of the fuel system: The fuel is stored for too long or the fuel contains water. The oil path is not smooth. When checking, the tubing connection to the carburetor can be unscrewed. If the fuel is smooth, it is normal. Improper installation of the carburetor results in air leakage, which makes the mixture too lean and affects the start of the engine. Diagnose the fault: Close the choke valve and the machine will return to normal immediately. This means that the carburetor or carburetor interface is leaking. Check if the fastener is loose and observe if there is any oil leakage. In addition, the carburetor is not clean and there is an obstruction of impurities, resulting in insufficient supply of oil and causing difficulties in starting. 3, spark plug EDM is not strong: If the fuel supply system is not faulty, you should check the ignition system, you can first remove the spark plug to do the flash experiment, check whether the electrodes have a strong blue fire jump, only the spark plug spark plug housing apart When the iron 3-4MM still has blue thick sparks to skip, in order to explain the spark is strong enough, when the flashover appears weak and red, should replace the spark plug or further check the ignition system. (III) Idle Speed ​​Bad: 1. No idle speed: After the engine starts, the open door is extinguished. Most of the reasons are due to the failure of the carburetor, followed by the air leakage from the mixture gas entering the cylinder, causing the mixture to thinn out. No idle speed. Check that the carburetor idle adjustment bolts are adjusted properly. If there is still no idle speed after adjustment, it means that there is something wrong with the carburetor. The carburetor should be dismantled first, and check whether the idle speed hole, idle oil passage and air passage are blocked. If there is any obstruction, it can be cleaned. 2. If the idle speed is too high: After idle adjustment, the idle speed is still too high. It may be that the carburetor throttle cable return spring is too soft to fully return the throttle. The position of the carburetor fork is loose. After the engine is turned, the sliding sleeve cannot withstand the fork to reduce the rotation speed: At this time, the position of the fork should be adjusted so that it can be held by the sliding sleeve. The engine slide slips or breaks and must be replaced.