As the saying goes, "people are old and old," but not all leg problems are caused by natural aging. In vascular surgery, there is a disease called lower extremity arteriosclerosis obliteration, commonly known as lower limb ischemia. The mild symptoms are acid, swelling, and pain in the lower limbs. You have to stop and take a break when you walk a little. If you are serious, you need amputation, even life threatening.
"In recent years, the incidence of lower extremity arterial disease has risen rapidly in the clinic. Patients who come to the vascular surgery of major hospitals in Hangzhou have suffered from 30% to 35% of lower extremity arterial diseases, and half of arterial diseases and venous diseases." It is the elderly who should be alert to the attack of lower limb ischemic diseases.
60% of the elderly, 20% have lower limb ischemia
“According to relevant epidemiological surveys, in the early 21st century, in the Western countries, the incidence of lower extremity arteriosclerosis was 25% in people over 60 years old, and it increased with age. In the elderly over 80 years old, The incidence rate is more than 50%. Although there is no national survey data for the time being, there are local surveys in major cities such as Shanghai and Beijing, and the data is basically close to that of Western countries."
Lower extremity arteriosclerosis occlusion can be divided into three stages according to the severity of symptoms. In the first stage, the lower limbs will feel chills and tingling, mainly in winter; in the second stage, intermittent claudication will occur, and each time the patient walks, the calf It will be sore, and a little rest can be recovered after a while; in the third period, there will be ischemic pain, and even a normal painkiller can not be restrained.
One touch and one button, timely identification of lower limb ischemia
"The life of blood vessels determines a person's life." This sentence is not without scientific evidence, because the blood vessels distributed in our body are a channel for transporting vital substances. If the ischemic problems of the lower limbs are not treated in time, there is a risk of amputation. It also increases the risk of cardiovascular accidents. Dr. Fang said that the risk of cardiovascular accidents in people with lower extremity arteriosclerosis is 4-5 times higher than that of the average person, and the risk of cerebrovascular accidents is increased 3-4 times.
How to find out if the lower limbs are ischemic? Teach everyone a way to touch the feet: First, whether the back artery is normal, whether the color of the foot is bright red, whether the temperature is warm enough, etc. Second, press the toe, the pressed skin will be white, if the whitish part is It turns red within 3 seconds, indicating normal. If the recovery time is too long, it means that the blood supply to the lower limbs has already occurred.
When there is no serious symptom of lower extremity arteriosclerosis occlusion, just do conservative treatment. It is to control the underlying diseases and insist on doing walking exercises (before you can't walk, to extend the distance of performance, generally 3-6 months to be effective, of course, you still have to stick to it), and most importantly It is to quit smoking.
"For every patient with lower extremity arteriosclerosis obliterans, my first condition is to quit smoking, because nicotine in tobacco not only damages the blood vessel wall, but also keeps the blood in a hypercoagulable state, easily forming a blood clot, if not smoking. Even if it is cured, it is easy to relapse."
Dump Truck
Dump Truck, Tipper is through hydraulic or mechanical lifting and self-unloading cargo vehicles. Also known as dumpers. From the vehicle chassis, hydraulic lifting mechanism, cargo compartment and take power plant and other components.
Scope
Dump Truck in civil engineering work and is often combined with excavators, loaders, conveyor and other construction machinery, constitute loading, transportation and unloading production lines, earthwork, gravel, bulk material handling and transportation work.
working principle
Dump truck engine, chassis and cab of the truck and the general structure of the same.
Dump the car after tipping and lateral tipping points to two types of operating system by control rod movement, backward tipping more common, pushing the piston rod so that the car tipping a few two-way tipping.
High-pressure oil through distribution valves, tubing into the lift cylinder, front-end cab car safety shield.
The engine through the transmission, PTO driven hydraulic pump unit, hydraulic tilting mechanism from the tank car, hydraulic pumps, dispensing valve, hydraulic lifting cylinders, control valves and tubing and other components.
The engine through the transmission, PTO devices driven hydraulic pump, high-pressure oil through distribution valves, tubing into the lift cylinder, push the piston rod so that the car tipping. After the tipping more common, by manipulating the system control movement of the piston rod, the car can stop at any desired position on the slant. Carriage using its own gravity and hydraulic control reset.
Taxonomy
1. In accordance with Brand:
Dongfeng truck, FAW dump truck , Auman dump truck, FOTON dump truck, heavy truck Steyr, Hongyan IVECO dump truck, JAC dump truck, FAW heavy dump truck , Shaanxi Shacman dump truck, HOWO dump truck, BEIBEN dump truck,Sino Truck Tipper.
2 according to shape classification:
Single axle dump truck, Double Axle dump truck, flat truck, tipper truck, the top four after eight 8*4 dump truck, tractor double axle dump truck, dump truck trailer Bridge
3. The species classification:
Bully dump truck, dump truck Huancavelica, 140 dump truck, dump truck 145, 153 dump truck, dump truck 1208, a small dump truck, dump truck dongfeng
4. Follow the links on the form of a hydraulic cylinder and lifting cars Category:
Direct Push tilt mechanism; link tilt mechanism.
5. Use according to category:
Agricultural dump truck, dump truck, Garbage Truck, dump truck transport of coal,
Construction machinery dump truck, dump truck sludge
6, depending on the driving mode is also divided into 6x4, 8x4 dump truck and Semi-Trailer dump truck.
7. Depending on the application is also divided into mining trucks, used to transport coal, sand and gravel; sanitation green dump truck used to transport garbage.
8, according to the car there before turning in the direction of Bootstrap and roll type dump truck. There are still two-way dump truck rollover, mainly used in construction.
The current domestic production of dump truck manufacturers have a relatively well-known Chinese heavy truck Jining Commercial Vehicle Co., Ltd., Tong Tong Group Special Vehicle Co., Ltd., China National Heavy Duty Truck Hubei Warwick Special Purpose Vehicle Co., Shaanxi Heavy Duty Automobile Co., Ltd.
advantage
Since the car can automatically load certain tipping angle discharge, saving unloading time and labor, shorten the transport cycle, improve production efficiency, reduce transportation costs, it is a commonly used special transport vehicles.
Care Tips
The new dump truck or car repair factory commissioning must be carried out so that the car ran smoothly without lifting process.
When using the various parts should be required to correct selection of lubricants, saving time and labor unloading, lifting mechanism strict schedule swap oil.
According to the rated load of the shipment, non-overloading.
Practice
1, can not be loaded in the middle of a sudden the elevator lift handle to the "down position."
In the event of this error, the car suddenly rushed down, the frame will bring a great impact, and even accidents. Therefore, we should try to avoid the above operation, if special circumstances also need to be careful, try to slow down the landing speed, the car suddenly do not have to avoid falling in the end.
2, do not mention the use of stronger car - brake suddenly unloading.
Due to fierce mention car inertial force is large (typically 5 to 20 times the rated lifting force), can easily result in permanent deformation of the frame, carriage and pay the frame open welding, burning or destruction of the pump seals, hydraulic cylinders and other damage damage , reduced service life of the vehicle, there will be severe rollover accident. Therefore, the general dump truck while driving ban lifting.
3, after the dump truck to be unloaded disengage the power take off before driving.
If this occurs operational errors, dump truck while driving, because the PTO in the "engaged" position, the lift pump is at "small cycles" state high speed for a long time no-load operation. Cause oil temperature rises rapidly, easily lead to damage to the pump seals, the pump even "burn" phenomenon; more serious is the operation of the pump means that the hydraulic system has a power source, in driving the process prone to auto-liter car since the accident.
4, with the power take off is not available in the "on" position.
If the "on" state (red light lit), the pump will continue to rotate, the hydraulic system there is a power source, so it will because the gas control valve on the steering malfunction caused by automatic car lift; gas at this time distribution valve control even in "down" position, but also into the oil pump, and the pump will burn out.
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