CN2146623Y - Non-resistance valve - Google Patents

Abstract

The utility model belongs to a stop valve for a fluid pipeline, comprising a straight flowing type shell, a valve cover, a core shaft, a handwheel, a main rubber ring, a rolling column, a sealing ring, etc. The utility model is formed by that the main rubber ring is driven by the core shaft, with rolling friction and in the principle of squeezing, blocking, opening and closing a valve. The utility model has the advantages of simple structure, high durability, reliable sealing, material saving, flexible rotation, small starting moment and little self resistance, and can be used for replacing an upright thread up and down opening and closing type stop valve; the handwheel can not rotating beyond an angle of 230 DEG.

Description

Non-resistance valve

The utility model relates to a kind of fluid line shutoff valve.

Valve is to produce and the widely used hardware product of sphere of life, and valve switch flexibly, sealing is reliable, sturdy and durable is its necessary function.At present, the shutoff valve of home and abroad widespread usage is mainly vertical screw thread rotation and opens and closes up and down, this structure valve seal is wayward, mainly adopt in its parts junction and twine numb slushing process seal, generally after using in three months, fiber crops are by corrosion, just begin to leak, if screw rod adopts the copper material can life-saving, but cost is higher, if screw rod adopts iron and steel then to be easy to occur the dead phenomenon of rust.There are two major defects in this structure valve in addition, and first flow resistance is big; It two is that to open moment big.Because it is high that the pressure medium effect makes valve emit, leak, drip, run the phenomenon frequency of occurrences, so it is wayward to have the sealing of stop valve now, and the life-span is shorter.

The purpose of this utility model proposes a solution at the problems referred to above exactly, uses the mandrel rolling friction and squeezes stifled principle of start-stop, designs a kind of simple in structure, flow resistance is little, unlatching moment is less, good sealing effect, the novel non-resistance valve that working life is long.

The utility model is to realize by such technological scheme: valve by one have metal shell that direct current type imports and exports, be contained in mandrel, primary elastomeric ring, roller and valve gap in the housing, sealing rubber ring, handwheel etc. constitute.The housing of valve adopts direct current type inlet/outlet structure, be placed with in position, valve pocket inner outlet place that its appearance closely contacts with mandrel by mandrel crowded flat the primary elastomeric ring, the axle surface Machining of mandrel and primary elastomeric loop contacts has vertical slot, and axle head leans out by the valve gap central shaft hole, and axle head is equipped with handwheel.Be placed with O type rubber seal between valve gap and the valve body.

The working principle of above-mentioned valve is: when starting valve, rotate counterclockwise handwheel, drive in the valve pocket primary elastomeric ring when mandrel rotates and roll that to go to water outlet spacing and end, this moment, valve export led directly to everywhere in opening state.If throttle down, handwheel is then rotated to by clockwise direction and spacingly stops at once.Because valve inlet, outlet are identical with valve pocket three diameter of section, so when water by the time do not have resistance substantially, the valve advantage of making by this principle also has: the handwheel corner does not generally exceed 230 °, valve switch is not subjected to the restriction of human strength size, as long as handwheel is gone to spacing, rotate flexibly and have nothing to do with the interior fluid pressure of valve pocket, it is little to start, close moment, sealing reliability height simple in structure, long service life.

Fig. 1 is according to concrete device schematic representation provided by the utility model

Be described in detail device provided by the utility model below in conjunction with accompanying drawing:

The utility model is made of metal shell (1), valve gap (2), mandrel (3), handwheel (4), primary elastomeric seal ring (5), roller (6), loam cake seal ring (7), stem seal circle (8), fastening screw trip bolt (9) as shown in Figure 1.Housing (1) is that three openings cavitys are arranged, and (13) suitable for reading are the positions that connects valve gap, and import (11), outlet (12) are straight-through relatively.Import, outlet, valve pocket diameter are identical.The effect of valve gap (2) is a supporting mandrel, the sealing valve pocket, mandrel (3) is the integral body that two Cylinders constitute, mandrel (3) is contained in valve pocket inside and is divided into its outer garden surface Machining of mandrel main body (31) vertical slot is arranged, and part is convenient to operation for arm of force part (32) is used to connect handwheel (4) beyond its valve pocket.Primary elastomeric ring (5) is a hollow rubber Cylinder, and it is installed in water outlet one side in the valve pocket, and contacts tightly with mandrel main body (31), and the ring heart of primary elastomeric ring (5) is equipped with a roller (6), and its effect is spacing.Seal ring (7), (8) are contained in connecting part between valve body and valve gap and mandrel and the valve gap, seal ring (7), (8) respectively.Being shaped as O shape, is constituent apparatus integral body with fastening screw trip bolt (9) locking.

Material therefor of the present utility model can be decided according to medium is different, all can reach ideal effect.

Claims (1)

1, a kind of non-resistance valve, it is characterized in that it is by metal shell (1), valve gap (2) mandrel (3), handwheel (4), primary elastomeric seal ring (5), roller (6), loam cake seal ring (7), stem seal circle (8), fastening screw trip bolt (9) constitutes, housing (1) has import (11), outlet (12), (13) three ports suitable for reading, import (11) outlet (12) is identical with the valve pocket cross section, mandrel (3) is the garden column construction, the outer garden of its main body (31) is processed with vertical slot, primary elastomeric seal ring (5) be a hollow cylinder ring it be installed in the valve pocket water outlet (12) one sides and with mandrel (3) close contact, roller (6) is contained in primary elastomeric seal ring (5) ring core, seal ring (7), (8) be zero shape structure.

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