CN201606543U

CN201606543U - One-way valve

Info

Publication number: CN201606543U
Application number: CN2010200329976U
Authority: CN
Inventors: 吴玉彬; 王林华; 张平
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2010-01-13
Filing date: 2010-01-13
Publication date: 2010-10-13
Anticipated expiration: 2020-01-13

Abstract

The utility model discloses a one-way valve, which comprises a valve body, a valve cover, a plunger type valve core and a return spring, wherein the valve body is connected with the valve cover in a threaded manner, the valve body is provided with an oil inlet, the valve cover is provided with an oil outlet, the valve body is internally provided with an oil inlet passageway which communicates the oil inlet and the oil outlet, the plunger type valve core is arranged on the oil inlet passageway, the plunger type valve core is internally provided with a T-shaped through hole which can switch on or switch off the oil inlet passageway when the plunger type valve core moves relatively to the valve body, the plunger type valve core is further provided with an annular flange, and the return spring is arranged between the annular flange and the valve cover. The one-way valve has a double one-way sealing function, can guarantee that the high oil pressure is one-way without leakage, and has good sealing reliability and good stability of the oil outlet pressure.

Description

One-way valve

Technical field

The utility model relates to a kind of one-way valve, particularly a kind of high pressure oil double seal one-way valve.

Background technique

One-way valve is a device commonly used on the machinery hydraulic system, Fig. 1 is the structural representation of existing one-way valve, as shown in the figure, one-way valve comprises valve body 100 and valve gap 200, described valve body 100 is provided with filler opening 101, described valve gap 200 is provided with the oil outlet (not shown), the oil inlet passage 102 that is communicated with described filler opening 101 and oil outlet is arranged in the described valve body 100, on described oil inlet passage 102, be provided with the steel ball 300 that can prevent fluid reflux, steel ball 300 is under the thrust of return spring 400, stop up oil inlet passage 102, spring 400 is fixed on the spring seat 500, and spring seat 500 is positioned at valve body 100, is threaded with valve body 100, open the hole on the spring seat 500, be convenient to the circulation of fluid.

Above-mentioned this one-way valve has characteristics such as simple in structure, easy to maintenance and good economy performance and is widely used in hydraulic system, but above-mentioned this one-way valve requires flowing medium precision height, and is higher to oily conditional request, can not contain impurity such as fine particle, otherwise, must influence the one-way sealing effect.

As bearing blast-melted transportation metal mixer in the Baosteel factory, also adopt one-way valve shown in Figure 1 in its oil lubrication system, (oil pump goes out oil pressure and reaches 31.5Mpa because this system belongs to high pressure, system's oil pressure relief is 20Mpa, it is 10MPa that lubricating point goes out oil pressure), use through a period of time, find that one-way valve is prone to problems such as valve seat, steel ball and return spring distortion, cause defective modes such as system's one-way sealing property decline or inefficacy; In addition; because body of oil is big; add the influence that is subjected to external environment condition; be mixed with metallic dust in the oil inevitably; the sealing reliability of steel ball just can not get guaranteeing; can not keep system works pressure (each pressurize is more than 3 minutes) well; cause that system back pressure flows backwards; adverse consequencess such as the lubricated face lubrication effect variation of the reduction of charge oil pressure and each; thereby cause the body of heater large-diameter; big bearing shell; the accelerated wear test of crucial parts such as size cartridge and auxiliary bearing; serious words can cause body of heater large-diameter surface crack and be decomposed soldering repairing etc. by forced-stopping machine; the production direct motion that has directly influenced main production line has also been shortened tank body simultaneously with efficient; the normal cycle working life of metal mixer critical components such as cartridge.

The model utility content

For addressing the above problem, the utility model provides a kind of one-way valve, effectively prevents and stop the internal leakage of one-way valve, and bonding is to the reliability of valve seal.

For achieving the above object, one-way valve of the present utility model comprises valve body and valve gap, described valve body and valve gap are threaded, described valve body is provided with filler opening, and described valve gap is provided with oil outlet, and the oil inlet passage that is communicated with described filler opening and oil outlet is arranged in the described valve body; One-way valve of the present utility model, also comprise plunger type spool and return spring, described plunger type spool is arranged on the described oil inlet passage, described plunger valve in-core is provided with the T shape through hole that can connect or cut off described oil inlet passage at described plunger type spool when described valve body moves, also be provided with collar flange on the described plunger type spool, described return spring places between described collar flange and the described valve gap.

Between described valve body and valve gap, be provided with seal ring.

One-way valve of the present utility model, plunger type spool spacing mobile energy in valve body is realized no clamping stagnation, damping telescopic, even lubricant oil contains the little metal powder, enter in valve body and the oil inlet passage, plunger return catching phenomenon can not take place yet, and can effectively avoid the one-way valve of prior art to cause the problem that steel ball clamping stagnation, distortion etc. are leaked, oil pressure descends because of there being impurity to enter.

One-way valve of the present utility model has the dual one-way seal action, can guarantee the unidirectional ne-leakage of high pressure oil, has good sealing reliability and the stability that goes out oil pressure.

Description of drawings

Fig. 1 is the structural representation of existing one-way valve;

Fig. 2 is the structural representation of one-way valve of the present utility model;

Fig. 3 is the exploded sketch of one-way valve of the present utility model.

Embodiment

Fig. 2 is the structural representation of one-way valve of the present utility model, and Fig. 3 is the exploded sketch of one-way valve of the present utility model, and wherein, Fig. 3 is the schematic representation of the side-looking direction of Fig. 2.As shown in the figure, one-way valve of the present utility model comprises valve body 10 and valve gap 20, and described valve body 10 and valve gap 20 are threaded, and described valve body 10 is provided with filler opening 11, described valve gap 20 is provided with oil outlet 21, and the oil inlet passage 12 that is communicated with described filler opening 11 and oil outlet 21 is arranged in the described valve body 10; One-way valve of the present utility model also comprises plunger type spool 30 and return spring 40, described plunger type spool 30 is arranged on the oil inlet passage 12 in the described valve body 10, be provided with the T shape through hole 31 that when described valve body 10 moves, can connect or cut off described oil inlet passage 12 at described plunger type spool 30 in the described plunger type spool 30, also be provided with collar flange 32 on the described plunger type spool 30, described return spring 40 places between described collar flange 32 and the described valve gap 20.

One-way valve of the present utility model by changing the one-way valve internal structure, improves the sealing of one-way valve in the prior art.Plunger type spool 30 is complementary with the oil inlet passage 12 of valve body 10, and the oil inlet passage 12 of valve body 10 had both played the effect to plunger type spool 30 guiding, bore the effect of one-way valve primary seal again; Make a call to a T shape through hole 31 at plunger type spool 30 towards filler opening 11 1 sides, under pressure, when plunger type spool 30 moves, play the effect that connected sum cuts off oil inlet passage 12; Described collar flange 32 1 is to contact by 10 of one side end face and valve bodies, plays the auxiliary seal effect, the 2nd, play axial limiting effect to plunger type spool 30.Like this, the oil inlet passage 12 of plunger type spool 30 and the valve body 10 formation primary seal that is complementary, simultaneously, the collar flange 32 of plunger type spool 30 forms face seal with the cushion cap face of valve body 10 inside, play the auxiliary seal effect, also just formed double seal mechanism and the effect that has played dual anti-leak.

Between described valve body 10 and valve gap 20, be provided with seal ring 50, with leakage proof.

One-way valve of the present utility model in use, the pressure oil that oil pump is got enters valve body 10 by filler opening 11, when oil pressure is elevated to the elastic force that can overcome return spring 40, because the existence of pressure difference, plunger type spool 30 is to return spring 40 1 side shiftings and compression retracteding position spring 40, when the opening that moves to T shape through hole 31 when plunger type spool 30 exposed, pressure oil entered valve body 10 inner chambers to oil outlet 21.When oil outlet 21 1 side oil pressure are higher than filler opening 11 1 side oil pressure, because of the elastic force effect of return spring 40 is moved plunger type spool 30, when the opening of its T shape through hole 31 is closed, just cut off oil inlet passage 12, prevented the working oil reverse reflux of oil outlet 21 1 sides.

Claims

1. an one-way valve comprises valve body and valve gap, and described valve body and valve gap are threaded, and described valve body is provided with filler opening, and described valve gap is provided with oil outlet, and the oil inlet passage that is communicated with described filler opening and oil outlet is arranged in the described valve body; It is characterized in that, also comprise plunger type spool and return spring, described plunger type spool is arranged on the described oil inlet passage, described plunger valve in-core is provided with the T shape through hole that can connect or cut off described oil inlet passage at described plunger type spool when described valve body moves, also be provided with collar flange on the described plunger type spool, described return spring places between described collar flange and the described valve gap.

2. one-way valve as claimed in claim 1 is characterized in that, is provided with seal ring between described valve body and valve gap.