Core pipe valve

Abstract

The invention provides a core pipe valve, and belongs to the field of valves. The core pipe valve is an original brand-new-structure valve, and refers to starting and stopping, pressure starting and stopping, adjustment, safety, decompression, returning stopping, pressure reduction, emergency cutting-off and the like. A valve element pipe is a fixing piece and coaxially penetrates through a sleeveI of a valve body, a valve body cavity and a sleeve II of the valve body; an axial partition is arranged in the middle of the valve element pipe, and two adjacent sides of the partition in the axialdirection are separately at least one radial circulating hole of a pipe section I and at least one radial circulating hole of a pipe section II; an annular valve element which surrounds the partition,an annular valve seat of at least one sleeve throat of the sleeve I and an annular valve seat of at least one sleeve throat of the sleeve II form a sealing pair; the difference between the outer diameters of the pipe section I and the pipe section II is greater than or equal to 0, the pipe section I is in shaft hole type fit with the sleeve I, the pipe section II is in shaft hole type fit with the sleeve II, and at least one combined portion is provided with a seal; and under the effect of two direction potential energy, the valve body axially moves in an axial direction relative to the valveelement pipe to implement starting and stopping and function transformation. The core pipe valve is simple in structure, convenient to manufacture, low in starting and stopping resistance and good insafety, reliability and sensitivity, and adapts to various working conditions, and the efficiency is improved.

Description

technical field [0001] The core tube valve of the present invention belongs to the field of valves. The core tube valve is an original new structure following the plug valve, globe valve, gate valve, butterfly valve, ball valve and diaphragm valve and has strong common technical characteristics. It will be used as a A huge series of valves has been released to the world, and the common technical characteristics of core tube valves will at least make the structural design of two-way valves span from the "Kingdom of Inevitability" to the "Kingdom of Freedom". [0002] The six characteristics of the core tube valve are lacking or not available in the existing six types of valves: plug valve, globe valve, gate valve, butterfly valve, ball valve and diaphragm valve: 1. No matter how much the medium pressure or the ambient pressure is, it has the characteristics of easy and fast opening and closing ; 2. Two-way opening and closing characteristics that can be realized; 3. External se...

AI Technical Summary

Problems solved by technology

[0024] Disadvantages: ①Because of the valve body lining process and diaphragm manufacturing process and restrictions, the larger valve body lining and larger diaphragm manufacturing process are difficult, so the diaphragm is not suitable for larger pipe diameters, generally used in DN≤200mm On the pipeline below; ② Due to the limitation of the diaphragm material, the diaphragm valve is suitable for low pressure and low temperature occasions; generally not exceeding 180 °C; ③ The adjustment performance is relatively poor, and it can only be adjusted in a small range (generally closed to 2 / 3 opening, can be used for flow regulation)

[0028] Disadvantages of compression spring direct load safety valve: the load will change with the opening, that is, the compression spring force will increase gradually during the opening process, resulting in poor discharge, and the opening height, discharge time and speed cannot be adjusted on site; during use The fatigue of the medium metal compression spring changes greatly and the pressure limiting parameters fluctuate greatly. It must be adjusted frequently to ensure normal use, otherwise there will be premature discharge or prolonged discharge

[0029] The disadvantages of pilot-operated safety valves are: the sealing rubber of the O-shaped rubber ring has poor temperature resistance; the structure is complex and the manufacturing cost is high; low sensitivity

[0053] At present, the valves used in pipelines such as submarines, nuclear energy, toxic and harmful media, flammable and explosive media, and urban water supply do not have a two-way burst pipe automatic cut-off valve. Slow, the control system itself also has faults, and the reliability is difficult to be fully guaranteed; the two-way squib automatically cuts off the core pipe valve can solve this problem, the automatic here means that through the medium energy of the pipeline itself, no other resources are required , control systems and control equipment

[0054] At present, exhaust valves and steam traps are all of the buoy type, which has a small flow caliber, a large valve volume, and is easy to block and wear on the sealing surface. Especially high temperature and high pressure steam traps are difficult problems in industrial applications. The core tube valve and the drain core tube valve can satisfactorily solve these two problems respectively

[0055] At present, safety valves, especially large-diameter safety valves, use spring type safety valves with poor reliability, and pilot-type safety valves are too complicated; safety core tube valves can satisfactorily solve the problems from miniature to large and super large safety valves

[0056] At present, a pipeline is connected in series with valves for many purposes, such as opening and closing valves, pressure reducing valves, regulating valves, balance valves, check valves, and emergency shut-off valves, which not only wastes resources, but also causes flow resistance, increasing failure rates and maintenance costs; A function variant core tube valve can satisfactorily solve this problem

Images