Fluid distributing valve, distributing valve combination unit and distributing system using the distributing valve

Abstract

The invention discloses a fluid distributing valve, which comprises a valve body, wherein the inside of the valve body is provided with a rotatable valve core in driving connection with an external drive device, the inside of the valve core is provided with a cavity, the inside of the valve body is further provided with an oil inlet valve body passage and an oil outlet valve body passage the openings of which are positioned on the surface of the valve body, the valve core is provided with a valve core passage corresponding to the oil inlet valve body passage and the oil outlet valve body passage inside the valve body, and the inside of the cavity of the valve core is hermetically and slidably connected with a plunger which divides the cavity into a first cavity and a second cavity; and the second cavity selects to be communicate with the oil outlet valve body passage or the oil outlet valve body passage through the second valve core passage. The fluid distributing valve adopts the structure that the inside of the cavity of the rotatable valve core is provided with the plunger which divides the cavity into two parts, has the advantages of strong adaptability to impurities, long service life and difficult blockage brought by the rotatable valve core of the rotary circulating-distributing valve in the document number of 200420029881.1, and can accurately control the amount of the lubricant (the grease lubricant).

Description

technical field [0001] The invention relates to the field of fluid distribution, in particular to a fluid distribution valve, a distribution valve combination unit using the fluid distribution valve, and a distribution system using the fluid distribution valve. Background technique [0002] At present, in metallurgy, mining, building materials, power generation and other industries and large-scale construction machinery, the original oil box oil supply method is gradually eliminated in these application fields, and the distribution devices and systems of lubricating oil and grease that are widely used mainly include: The following two types: 1. Single-line oil distribution system and single-line oil distribution valve; 2. Double-line oil distribution system and double-line oil distribution valve. [0003] The disadvantage of single-line oil separation system and single-line oil separation valve is obvious, that is, as long as one lubrication point is blocked, the circulation...

AI Technical Summary

Problems solved by technology

2. There are two oil supply circuits in the system. Compared with the single-line oil distribution system and oil distribution device, the system is not easy to collapse, but the oil distribution valve in this system is easy to cause the oil distribution valve near the oil pump to withstand high pressure and the distance Insufficient pressure of the far oil distribution valve of the oil pump

The lubrication system using solenoid valves has the following disadvantages: 1. Solenoid valves are prone to normally-on failures, especially in lubrication systems with many lubrication points and many solenoid valves, as long as one solenoid valve has a normally-on failure, It will cause the waste of lubricating oil and the reduction of system oil pressure. At the same time, the excess grease will leak out and pollute the working environment.

2. The solenoid valve is generally large in size, and the lubrication system generally requires a small solenoid valve. The small size of the solenoid valve results in limited magnetic force, which makes the solenoid valve prone to blockage and affects the normal operation of the lubrication system.

The advantage of this kind of valve is that there is no excessively narrow part of the oil circuit, it has strong adaptability to impurities mixed in the grease, it has a long service life, and it is not easy to be blocked, but at the same time, this kind of valve also has its disadvantages: this kind of valve itself cannot control the oil In order to control the amount of oil supplied by the lubricating system using this valve, a solenoid valve is installed on the grease input pipeline of this valve, and the amount of oil (grease) supplied is adjusted by controlling the opening time of the solenoid valve.

However, considering the change of the solenoid valve switch time and the pressure of the main oil pipe of the system and the viscosity change of the lubricating oil, this device can actually only control the approximate amount of lubricating oil, but cannot accurately control the amount of lubricating oil.

At present, there is no oil separation device on the market that has the advantages of strong adaptability to the above-mentioned impurities, long service life, and no jamming, and can accurately control the amount of lubricating oil.

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