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The principle and characteristics of the use of flanges

  • Time of issue:2021-08-13

The principle and characteristics of the use of flanges

(Summary description)      Flange work characteristics:

  Flange work characteristics:

   1. A self-control butterfly valve that can be remotely contr olled, which also has the characteristics of a flanged butterfly valve, and can be equippe™d with a wide range of butterfly valves;

  2. The power supply is the driving energy of the butterfly valve, ®with a wide range of power sources, wide applicati©on range, saving human resources, and having work efficiency;

  3. Convenient operation and easy to meet various control requirements. →It can be realized by selecting different actuators, signal feedback, flow adjustment, exβplosion-proof and other functions;

  4. Ultra-miniaturization can be realized, mechanical self-locking can be realized, and different  sealing rings can be changed to meet different working conditions.

  The working principle of flange:

  Using the actuator to input a standard signal of 0-10 m↑A, the motor group drives the gear, worm, and torque to drive th₽e disc to rotate. When the valve is in the fully open position, t∑he thickness of the butterfly plate is the resistance of the medi₩um flowing through the valve body, so the pressure εdrop generated by the valve is small, so it has better flow control charac☆teristics.

  Butterfly valve has two sealing types: elastic seal and m₩etal seal. For elastic sealing valves, the sealing ring can be embedded on the valve body ♦or attached to the periphery of the butterfly plate. The valve "with metal seal generally has a longer life than the valve with elastic seal, but it is difficu♦lt to achieve a complete seal. Metal seals can adapt to ↔higher operating temperatures, while elastic seals have the defect of temperature limitation.β If flanged butterfly valves are required to be used as 'flow control, the main thing is to correctly select th£e size and type of the valve.

  • Time of issue:2021-08-13
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      Flange work characteristics:

  Flange work characteristics:

   1. A self-control butterfly valve that can be remotely controlled, which also has the charλacteristics of a flanged butterfly valve, and can be equipped with a wide ∞range of butterfly valves;

  2. The power supply is the driving energy of the butterfly valve, with a wide range of power sou'rces, wide application range, saving human resources, and havi←ng work efficiency;

  3. Convenient operation and easy to meet various control requireme₽nts. It can be realized by selecting different actuators, signal feed★back, flow adjustment, explosion-proof and other functions;

  4. Ultra-miniaturization can be realized, mechanical self-locking can be realized, a™nd different sealing rings can be changed to meet different working condit≤ions.

  The working principle of flange:

  Using the actuator to input a standard signal of 0-10 mA, the motor gαroup drives the gear, worm, and torque to drive the disc t≈o rotate. When the valve is in the fully open position, the <thickness of the butterfly plate is the resistance of the medium flowing through the valve bo>dy, so the pressure drop generated by the valve is small, so it has better flow conλtrol characteristics.

  Butterfly valve has two sealing types: elastic seal and metal s‌eal. For elastic sealing valves, the sealing ring can be embedded on the valve body or atta ched to the periphery of the butterfly plate. The valve with metal seal generally has a ≤longer life than the valve with elastic seal, but it is diff<icult to achieve a complete seal. Metal seals can ad₽apt to higher operating temperatures, while elastic seals have  the defect of temperature limitation. If flanged butterfly valves are required to be use↓d as flow control, the main thing is to correctly select the size and type of the val÷ve.

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   The neck height of the neck flange is low, which can improve the rigidity and load-bearing cap∞acity of the flange. Compared with the butt-welded flange≤, the welding workload is large, the electrode consumption is high, anφd it cannot withstand high temperature and high pressure, repeated bending ∑and temperature fluctuations, but the on-site device is more convenient, and the process of welding> seam scratching can be omitted, which is more popular. Butt welding flange with neck: neck flange ™welding is usually called "high hub" flange. Its purpose is to transfer the pres±sure of the pipeline, thereby reducing the high stress conc‍entration in the flange base. Neck flange welding is a ÷good design for butt welding those flanges that are provided due to theiγr own constructive value. However, the price is relatiφvely high because of the complicated production process of t¥he product. Threaded (threaded) flange: The threaded flange is connected& by threaded fasteners. But the center of the product has a thread size corr→esponding to the pipe. Its main advantage is that it can be assembledλ without welding. Sliding flange: Sliding flange ha"s a lower hub, because the pipe enters the single flange before weldi≈ng. This is to provide sufficient strength inside and outside the welding to avoid leakage. Sl∑iding flanges are matched with boring pipes with slightly larger oute∏r diameters. They are better than neck flange welding due to lower initial cost. flange Many  users, but the cost of the latter device will not be low, due to the increase in the number of wel£d neck flanges, lap flange: in practice, the lap flange is th¶e same complete sliding flange, unless it is in the hole and A radius between flange races. It i→s necessary for the radius to have the flange to contain ↔the lap stub to complete. Usually, the lap flange and the lap stub end mating together will asλsemble the system. The socket welding flange is a similar sliding flange, unless it has a hole an≠d a counter hole size. The matching of the counter hole an≥d the pipe allows the pipe to be inserted into a sliding flange simila™r to the flange. The diameter of the smaller hole is matched with tσhe same pipe with the same ID. The restriction is a ₩built-in hole that stays at the bottom as a shoulder sleeve desig✘ned for pipes. This eliminates any flow restrictions when  using socket welding flanges.
  1. In order to compact the sealing surface of the flat≥ welding flange, only a small pressure is required. As the required pressure drop✘s, the size of the bolts and the number required are correspondingly reduced∞. After all, a plan is planned. A flat welding flange product δwith a relatively small volume and a relatively light weight.    2. The production o←f flat welded flanges can save data and reduce cost₩s. When the raw material of the pipe is special and the price is high, the cost of welding tΩhe flange of the same raw material will be high, and the use of this flange can effectively sβave the cost of materials. Conducive to construction, when connecting, the bolt πholes of the flange are inconvenient to align or to avoid replacing the flange✘ bolt holes of the equipment, etc., the use of this flat welded flange is very suitable.  ©       3. The flat welding flange can save space and reduce weight in the process of use . The most important thing is to ensure that the head part will not leak. It ha≤s a very outstanding sealing function. The reason why the size of the compa★ct flange is reduced is because The diameter of the se al is reduced, which will reduce the cross-section• of the sealing surface. Also, the flange gasket h✔as now been replaced by a sealing ring to ensure a™n outstanding matching of the flat welded flange seal facing th★e sealing surface.    flat welding flange    But it also has some disa♠dvantages:    Disadvantages of flat welding flange:   The main design disadvantage of flat welεded flanges is that it cannot ensure no leakage. This is the lack of its planning: t≤he connection is dynamic, and for example, thermal expansion and ₽fluctuating cyclic loads will cause movement between the fla≥nge surfaces, which will affect the function of the flange, which will d¶amage the integrity of the flange and eventually lead to leakage. It is impos₩sible for any product to be without shortcomings, just try to control >the lack of products to the minimum, so the company tries to perfect the functions of the produ<cts when producing flat welded flanges to make them play the greatest role.
      Flange work characteristics:   Flange work >characteristics:    1. A self-control butterfly valve that can be↔ remotely controlled, which also has the characteristics of a flanged butte←rfly valve, and can be equipped with a wide range of butterfly valves;   2. The power suppl₩y is the driving energy of the butterfly valve, with a wide range of power sources, wide applicatiφon range, saving human resources, and having work efficiency;   3. Convenient operati×on and easy to meet various control requirements. It can be realized by selecting dif£ferent actuators, signal feedback, flow adjustment, explosion-proof and other fun♣ctions;   4. Ultra-miniaturization can be realized, ₽mechanical self-locking can be realized, and different sealing✘ rings can be changed to meet different working conditions$.   The working principle of flange:   Using the actuator to input a standard signal of 0-10 mA,× the motor group drives the gear, worm, and torque to drive the disc to rotate. When the valve i↓s in the fully open position, the thickness of the butterfly plate is the resistδance of the medium flowing through the valve body, so the pressure drop generated by the valve is♣ small, so it has better flow control characteristics.   Butterfly valve has two sealing types: el£astic seal and metal seal. For elastic sealing valves, the sealing ring can be embedded on th←e valve body or attached to the periphery of the butterfly plate. The v✘alve with metal seal generally has a longer life than the valve with elastic se®al, but it is difficult to achieve a complete seal. Metal ☆seals can adapt to higher operating temperatures, while elastic seals hav&e the defect of temperature limitation. If flanged butterfly ↕valves are required to be used as flow control, the main thing is to correctly select αthe size and type of the valve.
 The valve is an accessory of the pipeline, used to cφontrol the flow, pressure, and direction of the fluid. The fluid to be controlled≥ can be liquid, gas, gas-liquid mixture or solid-liquid mixture.   one. Bas™ic parameters of valve   The basic parameters of the valve include working pressure' (PN), working temperature (T) and nominal diameter (DN). For various valves equipped on pipelγines, nominal pressure and nominal diameter are commonly used as basic parameters. Nominal pr♥essure refers to the maximum working pressure that a v×alve of a certain material can withstand at a specΩified temperature. The nominal diameter refers to the nominal inner ∏diameter of the connecting end of the valve body and th☆e pipeline. Valves, pipelines and pipeline accessories of the same nominal diameter ca₹n be connected to each other, which is interchangeable.   two. Valve classification    1. Accor ding to function and purpose    According to the different funct±ions of the valve, it can be divided into the following fi've types:   ①Shutoff valve    shut-off valve is also called cγlosed-circuit valve, its function is to connect or cut off thλe medium in the pipeline. Block valves include gate valves, globe valves, plug♥ valves, ball valves, butterfly valves, and diaphragm valves.   ②Check valve    Check valve ™is also called one-way valve or check valve, its function is to prevσent the back flow of the medium in the pipeline. For example, the s÷uction valve of the water pump belongs to the non-return valve category.   ③Safety valσve    The role of safety valves is to prevent the pressure of the medium in the pipe£line or device from exceeding the specified value to protect the ♣safe operation of subsequent equipment.   ④Regulating valve   The ∞function of the regulating valve is to regulate the pressure,φ flow and other parameters of the medium. The regulating valve has ™different classification methods. According to the purpose and function, the regulating® valve can be divided into:    (1) Two-position valαve. The two-position valve is mainly used to close or connect the medium.    (2) Regulating v₩alve. The regulating valve is mainly used for regulating the ©coefficient. When selecting the valve, the flow characteristics of the regulating valve need to be→ determined; the regulating valve can be divided into the following forms according to th¶e structure: single-seat regulating valve; double-seat regulating valve; sl'eeve regulating valve; angle regulating Valve; three-way regulating va™lve; diaphragm valve; butterfly valve; ball valve; eccentric rotary valve.   ✘ (3) Shut-off valve. Usually refers to a valve with a leakage rate of less∞ than one part in 100,000.   ⑤Divert valve    The diverter v↑alve includes various distribution valves and flow valves, ★etc., whose function is to distribute, separate or mix the medium in the pipeline. ∏   2. According to the valve drive mode   According to the valve drive mode, it can be divided £into the following three types:   ①Automatic valve ←   refers to valves that do not require external drive, but rely on the energy of the medium× to actuate the valve, such as safety valves, pressure reducing valv®es, traps, check valves, automatic control valves, e×tc.   ②Power driven valve   The power-driven valve can be driven by various power sources. In•cluding electric valves driven by electricity, pneumatic valv♥es driven by compressed air, hydraulic valves driven by hydraulic pressure such  as oil, and combinations of various driving methods, such as pneumatic-ele™ctric valves.   ③Manual valve   Manual valves use∞ handwheels, handles, levers, sprockets and other components to manipulate the valve action  by manpower. When the valve closing torque is large, a gear or turbo reducer  can be set between the handwheel and the valve stem. If necessary, universal joints and drive shaft¥s can also be used for long-distance operation.   3. Press the coπnnection method    can be divided into the following six types according to the connection m®ethod:   ①Threaded connection valve: The valve body has an internal thread or an external threa§d to connect with the pipe thread;   ②Flange conne‌ction valve: the valve body has a flange to connect with the pipeline fla✔nge;   ③Welding connection valve: The valve body h¥as a welding groove and is welded to the pipeline;   ④Clamp-connected valve: the valve ¥body has a clamp to connect with the pipe clamp;   ⑤ Card sleeve connection valve: It is₩ connected with the pipeline by a card sleeve;   ♣⑥Wafer connection valve: a connection form in which the valv₹e and the two pipes are directly clamped together with bolts.   4. According to t≥he valve body material   ①Metal material valve   The valve body and other parts are made of met♦al materials, such as cast iron valves, carbon steel val"ves, alloy steel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titan™ium alloy valves, Monel alloy valves, etc.   ②Non-metallic valve   The valve body an↕d other parts are m
The caliper can also be called a brake cylinder. There are a lot of pistons® inside the caliper. The function of the caliper is to push the brake pads to  clamp the brake disc, so that the car can slow down. After the brake pads clamp the brake disc, t≤he kinetic energy can be converted into heat energy. The brake system is a vital system §in a car. The brake system is related to the driving stability and driving safety factor of the ≈car. The key components of the brake system include vacuum booster pump, brake master  cylinder, brake cylinder, brake pads, and brake discs. Br£ake pads and brake discs are basically wearing parts that need to be replaced on a rδegular basis. As the driving distance of the car increases, the brake pa ds and brake discs will basically continue to wear. After the brake pads and br<ake discs are worn to a certain degree, they need to be replaced. If they are no↕t replaced, the braking distance will be affected. After the driver steps on the brake pedΩal, the master cylinder can push the brake cylinder through the brake fluid. At this time, th♥e brake cylinder can push the brake pads to clamp the brake disc. The vacuum booster pump pro‍vides power assistance, and the vacuum booster pump allows the driver to easily step on the br∑ake pedal. The brake fluid in the brake system needs to be replaced regularly. If it is "not replaced for a long time, it will affect the braking foγrce and braking distance. Brake fluid is a kind of fluid that  is easier to absorb water. When the water content of the brak¶e fluid reaches 3%, it needs to be replaced. After re±placing the brake fluid, the air in the brake system pipeline needs to  be emptied, otherwise the braking force and braking distance may also be affected.
   We have seen many products using gears in our lives, but do you know what principle ♥they use gears? According to its working principle,    gear has the following funct ions: First, gears can transmit mechanical power, such as automobil‍e gear shifting devices, industrial gearboxes, etc.; second, gears can ch ange the direction of movement, such as mechanical watches, shaking head devices in electr&ic fans, etc.; third, gears can reduce speed and Improve torque, such as motor reducer, var‌ious speed change mechanisms, etc.   Gear transmission mechanism    Here are two in£teresting applications of gears in automobiles and aviation, let's take a look at the role of gear↑s in them.    There is a mechanical structure in a car called a differenti al, which is an extremely important part. When a car turns, the speeβds of the inner and outer wheels are different. If there is no differential, the sp>eeds of the inner and outer wheels are the same. The wheels slip and r®oll over. Moreover, the speed of the car is very fast, and it is absolu≥tely impossible to have no differential at high speeds. The gear¶ here is on the differential, which can not only transmit∏ the power of the engine, but also reduce the speed through the diff♣erent speed ratios of the gear device, and at the same time can achieve a very cool "dif↑ferential" function.    three-dimensional model of dif♦ferential   In aviation, helicopters using coaxial reversa'l technology are favored by many countries because of their excellent perfor‍mance. This helicopter has two propellers on the same shaft. Whenσ the plane is flying, the rotation direction of the two propellers mγust be opposite to ensure the power balance of the plane.   Helicopte♠r using coaxial reversal technology    From the three-dimensional model ofπ the coaxial reversal structure, it can be seen that aλfter two transformations of the gear, the mechanical transmission direction is smoothly changed,♦ and two different rotation directions are realized on the same shaf‌t.
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