Truck lift leg common fault
· The lifting leg of the truck is slow or does not move
1. Check if there is something wrong with the truck crane hydraulic system;
2. Check whether the lifting valve of the truck is able to reduce the set pressure due to loosening of the adjusting screw. Can the valve seat be damaged or dusty on the outside surface of the valve? Can the valve be stuck in the open position? Can the needle valve wear out and the spring can be deformed? Or damage, see the situation stop adjusting or repairing;
3, check the truck hanging valve, see whether the valve stem wear, whether the valve can be deformed or damaged, look at the situation with the change; Fourth, check the leg cylinder, see if the piston can get stuck, the piston rod can be bent, Look at the situation and change.
• Retract the cylinder rod when lifting the cylinder;
1. Check the pilot-operated check valve to see whether the seat surface is damaged or dusty, whether the valve or piston can be stuck in the open position, whether the spring is intact, and whether the O-ring can be in good condition. ;
2, check the leg lift cylinder to see if the sealed O-type can be damaged, the cylinder arm can scratch, see the situation with the exchange or repair.
· The outriggers stick out when the vehicle is lifted
1, check the manual control valve {for legs}, see whether the hydraulic control check valve seat surface damage or dust, hydraulic check valve can be stuck, the spring can damage, see the situation to stop repairing or with change;
2, check the leg lift cylinder to see if the seal O-ring can be damaged or worn, the cylinder arm can be scratched, see the status of repair.
· The lifting system of the truck crane is slow or does not move
1. Check if there is something wrong with the truck crane hydraulic system;
2. Check the truck lift relief valve;
3. Check the manual control valve on the crane to see whether the valve stem can wear out, whether the valve can be damaged inside or not. See the situation and stop repairing;
4, check the truck crane slewing reducer to see if the gear or the bearing can get stuck, whether it can be lost due to serious wear and tear, the output shaft can be broken, look at the status of repair or change.
Titanium Dioxide(TIO2)
Titanium dioxide is an important inorganic chemical pigment, the main component is titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chloride method. It has important applications in coatings, inks, papermaking, plastics and rubber, chemical fiber, ceramics and other industries.
It has two types: rutile type (Rutile R type) and anatase type (Anatase A type). The rutile crystal structure is compact, relatively stable, and has low optical activity, so it has good weather resistance, and has high hiding power and decolorizing power.
Titanium dioxide is widely used in coatings, plastics, rubber, ink, paper, chemical fiber, ceramics, daily chemicals, medicine, food and other industries.
The coating industry is the largest user of titanium dioxide, especially Rutile Titanium Dioxide, most of which is consumed by the coating industry. The paint made of titanium dioxide has bright colors, high hiding power, strong tinting power, low dosage, and many varieties. It can protect the stability of the medium, and can enhance the mechanical strength and adhesion of the paint film to prevent cracks. Prevent the penetration of ultraviolet rays and moisture, and extend the life of the paint film.
The plastics industry is the second largest user. Adding titanium dioxide to plastics can improve the heat resistance, light resistance, and weather resistance of plastic products, improve the physical and chemical properties of plastic products, enhance the mechanical strength of the products, and extend the service life.
The paper industry is the third largest user of titanium dioxide. As a paper filler, it is mainly used in high-grade paper and thin paper. Adding titanium dioxide to the paper can make the paper have better whiteness, good gloss, high strength, thin and smooth, no penetration during printing, and light weight. Titanium dioxide for papermaking generally uses Anatase Titanium Dioxide without surface treatment, which can act as a fluorescent whitening agent and increase the whiteness of paper. However, laminated paper requires the use of surface-treated rutile titanium dioxide to meet the requirements of light resistance and heat resistance.
Titanium dioxide is also an indispensable white pigment in advanced inks. The ink containing titanium dioxide is durable and does not change color, has good surface wettability and is easy to disperse. The titanium dioxide used in the ink industry has rutile type and anatase type.
The textile and chemical fiber industry is another important application field of titanium dioxide. Titanium dioxide for chemical fiber is mainly used as a matting agent. Since the anatase type is softer than the gold red type, the anatase type is generally used. Titanium dioxide for chemical fiber generally does not require surface treatment, but in order to reduce the photochemical effect of titanium dioxide and prevent the fiber from degrading under the action of titanium dioxide photocatalysis, surface treatment is required for some special varieties.
The enamel industry is an important application field of titanium dioxide. The enamel grade titanium dioxide has high purity, good whiteness, fresh color, uniform particle size, strong refractive index and high color reducing power, and has strong turbidity and Opacity, make the coating thin, smooth and strong acid resistance after enamelling. It can be evenly mixed with other materials in the enamel manufacturing process, does not agglomerate, and is easy to melt.
The ceramic industry is also an important application field of titanium dioxide. Ceramic grade titanium dioxide has high purity, uniform particle size, high refractive index, excellent high temperature resistance, and does not change ash at 1200°C for 1 hour. High opacity, thin coating, light weight, widely used in ceramics, construction, decoration and other materials.
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