Ultra-high pressure balanced load balancing valve and method thereof

Abstract

The invention relates to an ultra-high pressure balanced load balancing valve and a method thereof. The ultra-high pressure balanced load balancing valve comprises a valve cavity, wherein the valve cavity is formed in a valve body and an upper part and a lower part of the valve cavity communicates with the outer part of the valve cavity; a valve core is movably arranged in a valve sleeve; an uppersealing base and a lower sealing base are respectively arranged at the two ends of the valve core in a sleeving manner; a pressure adjustment spring device and a conical valve seat spring device arerespectively arranged at the upper end and the lower end of the valve cavity in a sealed manner; an upper hydraulic chamber is arranged between the valve core and the upper sealing base and communicates with an upper oil hole; a lower hydraulic chamber communicates with a lower oil hole; the upper hydraulic chamber communicates with the lower hydraulic chamber through a channel arranged in the valve core; the valve sleeve is also provided with an intermediate hydraulic chamber formed in the middle end of the valve core; and the intermediate hydraulic chamber is connected with a pilot control hole and an oil passing hole. The ultra-high pressure balanced load balancing valve disclosed by the invention is mounted on an oil cylinder, the load balancing valve can be automatically turned on when the pressure in the oil cylinder exceeds the regulated pressure, over-high oil pressure is unloaded, a function of balancing load is achieved when one load is synchronously jacked by a plurality ofoil cylinders, and the oil cylinder is protected from being overloaded and damage on the oil cylinder is avoided, and therefore, the service life of the oil cylinder is prolonged, and the economical efficiency is promoted.

Description

technical field [0001] The invention relates to an ultra-high pressure balanced load equalizing valve and a method thereof, belonging to the technical field of hydraulic control valves. Background technique [0002] When multiple (4 or more) oil cylinders are used to lift a heavy object, there are usually problems with synchronization and load balancing, especially when the oil cylinder is lowered with load, it is more likely to be overloaded; that is, one oil cylinder descends slightly faster , most of the load will be pressed on the two cylinders on the other diagonal, which will nearly double the pressure of the cylinder. In order to ensure the safety of the cylinder, the load capacity of the cylinder has to be reduced by one time. For example: top To lift a workpiece of 1000 tons, at least four 500-ton oil cylinders must be used, which is very uneconomical, and overloading will also cause local structural damage to the workpiece. [0003] In the prior art, the four-poin...

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Problems solved by technology

[0002] When multiple (4 or more) oil cylinders are used to lift a heavy object, there are usually problems with synchronization and load balancing, especially when the oil cylinder is lowered with load, it is more likely to be overloaded; that is, one oil cylinder descends slightly faster , most of the load will be pressed on the two cylinders on the other diagonal, which will nearly double the pressure of the cylinder. In order to ensure the safety of the cylinder, the load capacity of the cylinder has to be reduced by one time. For example: top It is not economical to use at least four 500-ton oil cylinders to lift a 1,000-ton workpiece. At the same time, overloading will cause local structural damage to the workpiece.

[0003] In the prior art, the four-point lifting hydraulic control circuit of the hydraulic control check valve is usually used; when the oil cylinder falls with load, the opening condition of the hydraulic control check valve is: P B >P AO / 6.5; for oil cylinders with lighter loads, the hydraulic control check valves are opened first, and for oil cylinders with heavier loads, the hydraulic control check valves are opened later, which further increases the load of the jacking cylinders that are opened later, making the hydraulic control check valves It is more difficult to open the valve until most of the load falls on the two cylinders on this diagonal line. It can be seen that the four-point jacking hydraulic control circuit using the hydraulic control check valve will cause deflection every time it is lowered with load. load

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