#wheatstone

Wheatstone - Symphonium

"Invented in 1829 by the physicist Charles Wheatstone, the famous discoverer of the electric "Wheatstone bridge," the symphonium features two characteristics that he later used in his concertina: the same notes at pressure and suction, and alternative distribution of the diatonic tones to the right and left hand (C is for the right hand, D for the left, E for the right hand, etc.). The chromatic tones are the buttons of the outer row. The two groups of twelve buttons on each side produce a chromatic range from c1 to d3 (lacking d#1). The form of the instrument recalls a sheng without pipes."

a stone for whetting one's appetite for wheat-based breads, excellent

Since sample cylinders are pressure vessels, the following precautions must be exercised during storage to prevent injuries caused by suffocation, fire, explosion, high pressure, and incorrect operation of compressed gas cylinders.

So we should explicitly prohibit the following behaviors:

1. The storage temperature of the sample cylinder is allowed to exceed 52℃.

2. Smoking or open flames are allowed in the storage areas of oxides or flammable gases.

3. Expose the sample cylinder to a corrosive environment.

Next, let’s talk about how to properly store and operate sample cylinders.

1. Store sample cylinders vertically.

2. Secure the sample cylinder when storing, handling or using.

3. Store sample cylinders in a dedicated area.

4. Separate full and empty bottles.

5. Store sample cylinders in a dry, cool, weather-free place, and away from combustible materials.

6. Separate flammable or combustible materials and oxides by at least 20 feet.

7. Monitor the air in areas where gas may be exhausted and accumulated.

8. Use a first-in first-out inventory system to prevent full bottles from being stored for too long.

9. Only store the amount of compressed gas required for the specific application.

10. sample cylinders are stored away from people's frequent access and emergency exits.

11. Provide adequate access for sample cylinder operations.

12. Regularly or at least weekly, check the stored sample cylinders for any signs of leakage or problems.

13. Restrict access to the sample cylinder storage area.

14.Prevent the sample cylinder from contacting wet or damp ground.

Many customers have caused the gas leakage of the sample cylinder due to the long storage time of the sample cylinder, collision during use or transportation, and there are several simple methods to detect whether the sample cylinder is leaking!

There are 4 ways to check gas leakage in sample cylinders:

1. Sensory method: adopt the method of hearing, nose and smell. If you hear a "sizzling" sound from the sample cylinder or smell a strong pungent odor or peculiar smell, it can be regarded as a leak. Although this method is very simple, it also has its limitations. It is definitely not applicable to toxic gases and certain flammable gases.

2. Smear method: This is also the most commonly used method for us to check whether the sample cylinder is leaking. It is to wipe soapy water on the leak detection part of the sample cylinder. If bubbles occur, it can be judged as a leak. This method is widely used and accurate, and it is strictly forbidden to use it when detecting leaks in oxygen cylinders, because soapy water contains grease, which will oxidize violently when it comes in contact with oxygen.

3. Balloon expansion method: Use a soft rubber tube to put on the air outlet of the sampling gas cylinder, and connect the other end to the balloon. If the balloon swells, it is considered to be leaking. This method is most suitable for leak detection of highly toxic gas and flammable gas.

4. Chemical method: The principle of this method is to touch certain chemicals prepared in advance with the gas at the leak detection point. If a chemical reaction occurs and exhibits certain appearance characteristics, it is determined to be a leak. For example, check the leak detection point with cotton dipped in ammonia water to check the ethyl chloride cylinder. If the chlorine white mist is generated, it will prove the leak; check the liquid ammonia cylinder with the red litmus paper moistened with water, close to the gas cylinder leak point, if the test paper is red It turns blue to indicate a leak. This method is only used for leak detection of certain highly toxic gases.

We can see many useless bombs and gasoline on TV and movies, and explosions can occur by using the principle of "dust explosion". It can be seen that although the dust particles are small, once an explosion occurs, its power cannot be underestimated. However, these explosions do not only appear in the plots of fictional film and television dramas, they have been staged in reality many times in industrial production activities.

In fact, flammable and explosive dust, gas or liquid will inevitably be generated or exist in the process of modern industrial production activities. You may not see or even feel their presence. However, once a certain amount is reached, it is easy to catch fire or even It caused an explosion, causing irreparable damage.

Therefore, when you select equipment or materials for such hazardous locations, you need to consider explosion protection as one of the primary safety factors, and motors are no exception. High-quality explosion proof servo motors with corresponding protection levels can help eliminate these invisible hazards and help create a safe and reliable working environment. The explosion proof servo motors under Wheatstone Motor are your good choice. Wheatstone motors provide permanent magnet synchronous servo motors with different explosion-proof levels and suitable for flammable and explosive gas and dust environments. It integrates the design of decades of explosion-proof experience, has a powerful explosion-proof enclosure, can withstand internal changes without endangering the surrounding environment, has excellent sports performance, outstanding acceleration/deceleration capabilities and high torque in a wide speed range The output greatly enhances flexibility. At the same time, it has passed rigorous explosion-proof tests and provides two versions that comply with European (CE) ATEX or Chinese standard GB3836. You can choose the appropriate product according to the actual situation.

The personnel who use gas sample cylinders must undergo extremely strict professional training. Only those who are very familiar with the dangers and have received training in correct operation techniques can operate gas sample cylinders.

Because the cylinder containing compressed gas is heavy and difficult to move, if the gas sample cylinders is not operated correctly, it may cause sprains, injuries, falls, bruises or fractures. If the gas escapes from the cylinder due to misoperation, many dangers will occur, such as fire, explosion, chemical burn, poisoning and frostbite. Therefore, gas users must increase the following vigilance to prevent injuries caused by incorrect operation of compressed gas cylinders.

We need to prohibit the following behaviors:

1. Pull or slide the gas sample cylinders, even for a short distance.

2. Drop the gas sample cylinders or let them violently collide with each other.

3. Subject the gas sample cylinders to mechanical shock that may damage the valve.

4 Use the gas sample cylinders as a rotor to move materials or other equipment.

5. Block the pressure reducing device of the gas sample cylinders.

6. Let oil, grease, or other flammable substances come in contact with gas sample cylinders, valves, or equipment that is using oxides.

7. Remove the product label.

8. Refill the compressed gas cylinder. This can only be done by a qualified compressed gas manufacturer.

9. Attempt to grasp the falling gas sample cylinders.

So how do we operate the gas sample cylinders? The following is the correct operation behavior.

1. Use a suitable cart to move the gas sample cylinders.

2. Keep the valve protection cap in place until the gas sample cylinders is secured and ready for use.

3. Fix the gas sample cylinders when storing, handling or using.

4. When returning the gas sample cylinders to the supplier, properly close the cylinder valve and properly install the cylinder sheath.

5. Use the correct personal protective equipment for gas sample cylinders handling. Wear safety glasses with shields, leather gloves, safety shoes and other suitable equipment.

Gas sample cylinders are often used in laboratories and are purchased relatively frequently. On the other hand, the gas in the container makes the container have a certain pressure, and the gas in the bottle is also complicated and dangerous. Therefore, laboratory personnel need to master the correct use of steel cylinders to avoid accidents.

First of all, before using any gas or gas mixture, the user of the gas sampling cylinder needs to know and understand the nature, purpose and safety precautions of the gas and equipment. For the safety information of the gas and equipment to be used, please refer to the supplier's Material Safety Data Sheet (MSDS) and safety procedures.

Secondly, gas users must determine the appropriate equipment to use based on the nature of the gas, and know how to operate the equipment safely. It is also necessary to understand the potential dangers in advance and make plans to deal with possible emergencies. Use emergency training to practice the implementation of these plans. Inform local hospitals, fire departments and other emergency response agencies of the gas being used so they will be prepared before an emergency occurs.

Third, the laboratory safety department shall provide personnel who use gas sample cylinders with personal protective equipment and training required for the safe use of gas sample cylinders. Workers are required to wear appropriate personal protective equipment every time they perform tasks. Place other safety devices such as fire extinguishers, eyewash stations and showers in suitable locations. Inform everyone about the dangers of the gas they are using and how to deal with emergencies.

Finally, the users of gas sample cylinders must comply with all national regulations on the storage, use and handling of compressed gases and cryogenic liquids. If the gas user is not familiar enough with the related attributes and hazards of a specific gas, please contact the supplier to obtain supplementary information to ensure safe operation.

Last time, we have talked about something about BLDC motors. It’s time for us to know about  in which fields the BLDC motor is used. If you want more details about the application of BLDC motors, please read the following article.

Now, we’ve seen that BLDC motors offer high efficiency and controllability, and that they have a long operating life. So what are they good for? Because of their efficiency and longevity, they are widely used in devices that run continuously. They have long been used in washing machines, air conditioners, and other consumer electronics. Recently, BLDC motors are appearing in fans, where their high efficiency has contributed to a significant reduction in power consumption.

BLDC motors are also being used to drive vacuum machines. In one case, a change in the control program resulted in a large jump in rotational speed—an example of the superlative controllability offered by these motors.

BLDC motors are also being used to spin hard disc drives, where their durability keeps the drives operating dependably over the long term, while their power efficiency contributes to energy reduction in an area where this is becoming increasingly important.