Applications of Pneumatic tube In postal service

Pneumatic tube tare systems that propel cylindrical containers through networks of tubes by compressed air or by partial vacuum. They are used for transporting solid objects, as opposed to conventional pipelines, which transport fluids. Pneumatic tube networks gained acceptance in the late 19th and early 20th centuries for offices that needed to transport small, urgent packages (such as mail, paperwork, or money) over relatively short distances (within a building, or, at most within a city). Some installations grew to great complexity, but were mostly superseded. In some settings, such as hospitals, they remain widespread and have been further extended and developed in recent decades.
A small number of pneumatic transportation systems(Performance Shock Absorbers) were also built for larger cargo, to compete with more standard train and subway systems. However, these never gained popularity.

The origin of hydraulic shock

Hydraulic shock is a term which describes the observation that a penetrating projectile can produce remote wounding and incapacitating effects in living targets through a hydraulic effect in their liquid-filled tissues, in addition to local effects in tissue caused by direct impact.Just as force applied by a pump in a hydraulic circuit is transmitted to elsewhere in the circuit because of the near incompressibility of the liquid, so the kinetic energy of a bullet can sometimes send a shock wave through the body, transferring physical shock to tissues whose physiologic function may be disrupted by it (especially in the circulatory or nervous systems). (Other kinds of shock, namely circulatory and psychological, may follow, but Industrial shock absorbers is the immediate disruptor.) There is scientific evidence that hydrostatic shock can produce remote neural damage and produce incapacitation more quickly than blood loss effects.In arguments about the differences in stopping power between calibers and between cartridge models, proponents of cartridges that are "light and fast" (such as the 9×19mm Parabellum) versus cartridges that are "slow and heavy"  often refer to this phenomenon.

Hydrostatic shock as a factor in selection of ammunition

In self-defense, military, and law enforcement communities, opinions vary regarding the importance of remote wounding effects in ammunition design and selection. In his book on hostage rescuers, Leroy Thompson discusses the shock damper importance of hydrostatic shock in choosing a specific design of .357 Magnum and 9×19mm Parabellum bullets.^] In Armed and Female, Paxton Quigley explains that hydrostatic shock is the real source of “stopping power.” Jim Carmichael, who served as shooting editor for Outdoor Life magazine for 25 years, believes that hydrostatic shock is important to “a more immediate disabling effect” and is a key difference in the performance performance shocks of .38 Special and .357 Magnum hollow point bullets. In “The search for an effective police handgun,” Allen Bristow describes that police departments recognize the importance of hydrostatic shock when choosing ammunition.
Hydrostatic shock is commonly considered as a factor in the selection of hunting ammunition. Peter Capstick explains that hydrostatic shock may have value for animals up to the size of white-tailed deer, but the ratio of energy transfer to animal weight is an important consideration for larger animals. If the animal's weight exceeds the bullet's energy transfer, penetration in an undeviating line to a vital organ is a much more important consideration than energy transfer and hydrostatic shock. Jim Carmichael, in contrast, describes evidence that hydrostatic shock can affect animals as large as Cape Buffalo in the results of a carefully controlled study carried out by veterinarians in a buffalo culling operation.

Different places with different size hydraulic shock absorbers

Industrial Shock Absorbers are used in various industries, like factory automation, heavy industry, defense industry and health machines, to save costs, improve machine efficiency, increase machine operating life and reduce noise pollutions and maintenance costs. As a hydraulic shock absorber manufacturer,manufactures adjustable and self-adjusting shock absorbers, hydraulic buffers (crane buffers), hydro checks and gas springs.

one are small-sized adjustable shock absorbers that can be adjusted by the adjustment dial up to 180° according to the collision speed. The bumper head type hydraulic shock absorber provides a positive stop to prevent damaged caused by the piston “bottoming out” in stage of stroke without stop collar.

Second Series are small-sized self-adjusting shock absorbers. They are specially designed with multiple orifices to smoothly stop moving loads. This vibration damper uses the bumper head type to provide a positive stop to prevent damage caused by the piston “bottoming out” in stage of stroke without stop collar.

Third Series are mid-sized adjustable shock absorbers for the medium and heavy moving loads. They are an adjusting type hydraulic shock absorber that can be adjusted by the adjustment dial up to 180° according to the collision speed.

Hydraulic Shock Absorber is mechanical operating parts

As mechanical operating parts of industrial machines, such as automated assembly machines, various conveyors, and safety devices for machine tools, become faster, they generate shocks, vibrations and noise that affect the poly tube overall performance of the machines and cause safety issues within the working environment. To solve these problems, hydraulic shock absorbers (hydraulic buffers) were developed. a hydraulic shock absorber manufacturer and Pet and glass shock absorbers provide controlled, predictable deceleration by absorbing the shocks and vibrations from production facilities. Hydraulic shock absorbers protect facilities from destruction, collisions and wears caused by vibrations. It is possible to prevent aging of production facilities, save costs by shortening operating hours, improve productivity, reduce noise pollution and increase production with hydraulic shock absorbers. Hydraulic Shock Absorbers come in various types and capacities to satisfy your needs.

Hydraulic buffer maintenance:

General hydraulic shock absorber possess certain warranty period, the majority of the hydraulic shock absorber is recommended that users do not own faulty hydraulic shock absorber for maintenance, be sure to return to the manufacturer maintenance, seemingly small things are actually quite complex, own maintenance is likely to cause unstable fault generated.

Hydraulic shock absorber has the following advantages:

1, with a self-regulating function, capable of forming a stable soft cushioning effect.
2, using a special treatment and special piston rod seal to avoid leakage of hydraulic oil, ensuring stable hydraulic shock absorber can be prolonged use.
3, the outer tube surface using a special treatment to protect, constitute strong fine layer, to avoid wear and rust.
4, externally threaded cylinder increases the heat dissipation area and convenient means sensitive.

What are the advantages of hydraulic shock absorber in development

Machine shock absorbers has a special advantage, we can solve the drawbacks of other buffers can not be solved, so that the mechanical performance would be enhanced life of the machine has also been extended. Specific advantages of following on to be described in detail.
First, because it can be solved using the disadvantages caused by poor due to the buffering, so you can well improve the productivity of machinery so as to enhance productivity and extend the life of the machine in order to reduce maintenance costs, and operation of the machine will be more stable and thus making the quality of the product will be more stable.
Then, because of mechanical machinery run more stable and therefore more secure operating time resulting in production safety accidents, and improve the working environment can also enhance the efficiency of staff and thus improve the overall competitive advantage.
At the same time, it contains some special guide member, as well as special member slider and grooves, making it a two-way torque generated when the work, so that the operation can be more open, as long as when playing vertical switch lever will not need to be adjusted , and has a very good advantage.
Hydraulic shock absorber has many advantages in terms of development, better performance, more stable, better performance.

Hydraulic shock absorber works: When the impact will be driven by external axial piston hydraulic oil squeeze the inner tube, after pressurized hydraulic oil discharged by one of the drain hole of the inner tube, and discharged from the inner tube of the hydraulic oil also back to the hole of the inner tube back into the tube; when the external force disappears, the spring piston bounce starting point waiting for the next action. So the principle of hydraulic buffer will be able to balance the moving object effectively stopped.
Classification of hydraulic shock absorber: can be divided into adjustable hydraulic shock absorber, not adjustable buffer two categories.

Works and types of buffer

Buffers are generally shaped structure is simple, mainly by the pressure parts, cushion (medium), reset and other housing parts and components. The basic working principle of the buffer is as follows: When the impact occurs, the impact load is applied to the pressure member, the buffer member (medium) to absorb the impact energy is converted into heat and dissipate some of the impact energy is converted into elastic energy stored in the biasing member ; when the end of the impact, the resilient biasing member makes pressure parts is reset to the initial position before impact. Usually required reset time as short as possible. And no backlash situation.
Structure Design Method buffer many are designed to be able to use the buffer structure and properties of materials required for the protection of the protected object. Media damping buffers are also diverse, conventional dry friction damping, gas and liquid media damping and electromagnetic damping.

Hydraulic shock absorber is widely used in the mechanical arm, screen printing machines, laboratories, teaching equipment, machine tools, food packaging machinery, rubber and plastic machinery, automobile manufacturing, automatic feeder, electrical machinery, haulage machinery, aviation transportation industry, national defense and military equipment, medical equipment and environmental protection equipment and other industries, in a stroke end or reduce shock and vibration as a safety measure.

Hydraulic pulse having the main functions are:

1, reduce or clear the entire buffer system for water hammer damage caused;

2, limit the pump start and stop time of the formation of harmful pressure peaks;

3, like the role of a protective pipe, and elbow joints to reduce the impact generated when the pressure changes;

4, the system permits the use of more small-diameter piping, reducing costs;

5, the hydraulic pulser can match up with the use of back pressure valves, allowing pressure changes in the pipeline close to zero;

6, to avoid air bubbles, jet media materials and other issues, or the formation of the state of degradation;

7, to avoid flowmeter other measuring instruments disturbed line pressure changes;

8, for the system to create a steady flow of environment, it is sustainable and stable transport materials to the dosing medium dosing point;

9, reduce cavitation situation, to create a good working environment for the metering pump, and to improve the operating characteristics of the pump function.

After the motion pulse snubber installed on the system, enabling the entire system when pressure fluctuations are buffered to reduce the impact force, the protection system.