The application of metal bellows and finned bellows in the internal combustion engine cooler is to install 1-1000 metal bellows with intermittent convex and concave metal corrugated tubes in the casing of the gasoline-diesel engine cooler or between the two tube plates of the cooling core. The pipe expansion method, the welding method and the like fix the same on one end of the tube plate, so that the flow state of the cooling medium is changed, thereby increasing the heat transfer coefficient and increasing the heat transfer efficiency. The invention has novel ideas, practical process, low cost, reliable performance, high heat transfer efficiency, no scaling, long service life and small thermal stress.
1. According to the actual working pressure of the hose, check the nominal diameter of the corrugation and the pressure gauge to determine whether to use the stainless steel mesh type.
2, the size of the hose nominal diameter, the choice of joint type (mainly flanged, threaded, quick joint connection) and size, hose length.
3, the state according to the state of the hose when using, refer to the correct use of the metal hose and installation method and the optimal length of the hose in the settlement compensation. Calculate the length of the hose in various motion states and the minimum bending times and minimum bending radius of the hose. The parameters are correctly selected and the hose length is correctly installed.
4. The working temperature and range of the medium in the temperature hose; the ambient temperature when the hose is working. At high temperatures, the operating pressure temperature correction factor at the high temperature of the metal bellows shall be determined to determine the temperature after the temperature correction to determine the correct pressure rating.
5. The chemical properties of the medium conveyed in the medium hose are determined according to the corrosion resistance parameter table of the hose material to determine the material of each part of the hose.
6, vacuum hose is mainly used in the production of single crystal silicon to achieve a negative vacuum
Mainly used in steel strips
The steel belt corrugated tube, also known as the steel belt reinforced polyethylene spiral corrugated tube, is a wound structure wall tube which is made of high density polyethylene (PE) as a base (inner and outer layer) and a surface coated with a bonding resin steel strip. The pipe wall structure consists of three layers: the inner layer is a continuous solid wall PE inner tube, and the inner layer tube is wrapped with a circular corrugated steel strip reinforcement (formed as "V" type by steel plate), which is reinforced in the corrugated steel strip. The outer layer of polyethylene is compounded to form a unitary spiral bellows. Its typical structure is shown in the figure. The modulus of elasticity of steel is nearly 200 times that of polyethylene (the modulus of elasticity of carbon steel is about 190,000 MPa). The advantages of combining metal and plastic are obviously the ideal way to achieve high rigidity and low consumption, and the high rigidity of steel can be achieved. The high-strength and plastic corrosion resistance, wear resistance and flexibility and other excellent characteristics are organically combined to take advantage of both aspects, to make up for the shortcomings of both aspects, to achieve high performance and low cost uniformity.