CN106438548B

CN106438548B - Throttle valve

Info

Publication number: CN106438548B
Application number: CN201611091564.6A
Authority: CN
Inventors: 白健信; 李大尤; 刘光喜; 李良周
Original assignee: Guangxi Liugong Machinery Co Ltd
Current assignee: Guangxi Liugong Machinery Co Ltd
Priority date: 2016-12-01
Filing date: 2016-12-01
Publication date: 2018-06-15
Anticipated expiration: 2036-12-01
Also published as: CN106438548A

Abstract

The invention discloses a kind of throttle valves, belong to technical field of engineering machinery, the throttle valve includes valve body, axial fluid channel is equipped in valve body, fluid channel includes the first passage communicated segmentation and second channel segmentation, the valve chamber of accommodating spool is equipped between the first passage segmentation and second channel segmentation, the axial passage for penetrating through its both ends is offered in the spool, the outer wall of the spool is equipped with three axially symmetric planes, and the radial direction duct connected with the axial passage is offered in each plane；The sum of the aperture in 3 radial direction ducts is more than the aperture of the axial passage either end, and the aperture of the axial passage wherein one end is more than the aperture in the radial direction duct, and the aperture of the axial passage other end is less than the aperture in the radial direction duct.The present invention can solve existing throttle valve can only be through-flow with firm discharge, can not realize into and out of oil stream amount（Speed）Different adjustment the problem of.

Description

Throttle valve

Technical field

The present invention relates to construction machinery production technical fields, especially a kind of throttling for construction machinery hydraulic system Valve.

Background technology

Throttle valve is widely used in engineering machinery hydraulic control field, throttles section or chock length by change to control The valve of fluid flow processed, a kind of throttle valve as shown in Figure 1 including valve body 01, are equipped with fluid channel, stream in valve body 01 Body channel includes first passage segmentation a and second channel segmentation b, and the aperture of first passage segmentation a is less than second channel segmentation b's Aperture.During work, fluid from second channel segmentation b flow into first passage segmentation a throttled, but this throttle valve there is： Since its valve port orifice size is fixed, either still can only all be led on fuel-displaced oil circuit with firm discharge in oil inlet oil circuit Stream can not be realized into and out of oil stream amount（Speed）Different adjustment the problem of.

Invention content

The technical problems to be solved by the invention are to provide a kind of throttle valve, which can solve existing throttle valve only Can be through-flow with firm discharge, it can not realize into and out of oil stream amount（Speed）Different adjustment the problem of.

To solve the above-mentioned problems, the technical solution adopted in the present invention is：This throttle valve, including valve body, valve sheet It is equipped with fluid channel in vivo, fluid channel includes the first passage axially communicated segmentation and second channel segmentation, and described first is logical Road is segmented the valve chamber that accommodating spool is equipped between second channel segmentation, and the axial direction that its both ends of perforation are offered in the spool is led to Road, the outer wall of the spool are equipped with three axially symmetric planes, offer in each plane and lead to the axial direction The radial direction duct of road connection；The sum of the aperture in 3 radial direction ducts is more than the aperture of the axial passage either end, described The aperture of axial passage wherein one end is more than the aperture in the radial direction duct, and the aperture of the axial passage other end is less than described The aperture in radial direction duct.

In above-mentioned technical proposal, more specific technical solution can also be：The mutual angle in the radial direction duct is 120°。

By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：

1st, the valve chamber of spool is housed due to being equipped between first passage segmentation and second channel segmentation, is opened up in spool There is the axial passage for penetrating through its both ends, the outer wall of spool is equipped with three axially symmetric planes, is offered in each plane The radial direction duct connected with axial passage；Also, the sum of the aperture in 3 radial direction ducts is more than the aperture of axial passage either end, The aperture of axial passage wherein one end is more than the aperture in radial direction duct, and the aperture of the axial passage other end is less than the hole in radial direction duct Diameter.In this way, when this throttle valve connects with hose coupling；First, when pressure oil is segmented from the first passage of valve body through spool Axial passage wherein one end flows into, and under the action of pressure oil, spool is pushed into and is close to close the endface of hose coupling by fluid, Communicating for three radial direction ducts and hose coupling inner cavity is blocked, fluid can only be flowed into from the axial passage other end in hose coupling Chamber, at this point, since the axial passage flows into the aperture of the aperture more than the outflow other end at end, throttle valve mainly plays throttling The area of passage of effect flows out the aperture of the other end for axial passage.Secondly, when pressure oil is segmented from the second channel of valve body The axial passage other end through spool flows into, and under the action of pressure oil, spool is pushed into the endface of valve chamber by fluid, opens three The oil duct in a radial direction duct and hose coupling inner cavity；Since the aperture in radial direction duct is more than the aperture at axial passage inflow end, Fluid selection shortcut walks the inapparent radial direction duct of restriction effect, then is flowed out from axial passage one end.At this point, due to 3 radial directions The sum of the aperture in duct is more than the aperture that axial passage flows out one end, and therefore, throttle valve mainly plays the area of passage of throttling action The aperture of one end is flowed out for axial passage.It realizes into and out of oil stream amount（Speed）Different adjustment.

2nd, the axial passage at its both ends is penetrated through due to being offered in spool；And the aperture of axial passage one end is more than axial The aperture of the channel other end, spool both ends orientation interchangeable, not only may be implemented in into and out of different flow on oil circuit when mounted （Speed）Adjusting, the inlet throttle speed governing of oil circuit and the switching of outlet throttle timing function can also be neatly realized, adapt to The specific demand of different user.

Description of the drawings

Fig. 1 is the structure diagram of existing throttle valve.

Fig. 2 is the structure diagram of the embodiment of the present invention.

Fig. 3 is the right view of Fig. 2.

Fig. 4 is the structure diagram of spool of the embodiment of the present invention.

Fig. 5 is the left view of Fig. 4.

Liquid is from throttle valve wherein one end into fashionable schematic diagram when Fig. 6 is use of the embodiment of the present invention.

Liquid is from the throttle valve other end into fashionable schematic diagram when Fig. 7 is use of the embodiment of the present invention.

Specific embodiment

The invention will be further described for embodiment below in conjunction with the accompanying drawings：

Fig. 2, Fig. 3, Fig. 4, throttle valve shown in fig. 5 including valve body 1, are equipped with fluid channel, fluid leads in valve body 1 Road includes the axial first passage segmentation L1 for setting and communicating and second channel segmentation L2, first passage segmentation L1 and second channel The valve chamber that accommodating spool 2 is equipped between L2 is segmented, offers the axial passage for penetrating through its both ends in spool 2, on the outer wall of spool 2 Equipped with three axially symmetric planes, the radial direction duct T3 connected with axial passage, radial direction duct T3 are equipped in each plane Mutual angle is 120 °；The sum of aperture of 3 radial direction duct T3 is more than the aperture of axial passage either end, axial passage Wherein the aperture of one end T1 is more than the aperture of radial direction duct T3, and the aperture of axial passage other end T2 is less than the hole of radial direction duct T3 Diameter.

As shown in fig. 6, first passage segmentation L1 axial passage through spool 2 wherein one end T1 of the pressure oil from valve body 1 It flows into, under the action of pressure oil, spool 2 is pushed into and is close to close the endface of hose coupling 3 by fluid, blocks three radial directions Duct T3 is communicated with 3 inner cavity of hose coupling, and fluid can only flow into 3 inner cavity of hose coupling from axial passage other end T2, at this point, Since axial passage flows into aperture of the aperture more than axial passage outflow end T2 of end T1, throttle valve mainly plays throttling and makees Area of passage is the aperture of axial passage outflow end T2.

As shown in fig. 7, second channel segmentation L2 axial passage other end T2 stream through spool 2 of the pressure oil from valve body 1 Enter, under the action of pressure oil, spool 2 is pushed into the endface of valve chamber by fluid, at this point, three radial direction duct T3 and hose coupling 3 inner cavities communicate；Since the aperture of radial direction duct T3 is more than the aperture of axial passage inflow end T2, fluid selection shortcut walks section The inapparent radial direction duct T3 of effect is flowed, then is flowed out from axial passage one end T1.At this point, the aperture due to 3 radial direction duct T3 The sum of be more than the aperture of axial passage outflow end T1, therefore, throttle valve mainly plays the area of passage of throttling action and leads to for the axial direction The aperture of road outflow end T1.It realizes into and out of oil stream amount（Speed）Different adjustment.

Meanwhile when mounted, spool both ends orientation interchangeable, when exchanging both ends orientation installation spool, throttle valve master The channel for playing throttling action is also and then exchanged, and not only may be implemented in into and out of different flow on oil circuit（Speed）Adjusting, also The inlet throttle speed governing of oil circuit and the switching of outlet throttle timing function, the special need for adapting to different user can be neatly realized It asks.

Claims

1. a kind of throttle valve, including valve body（1）, valve body（1）Interior to be equipped with fluid channel, fluid channel includes what is axially communicated First passage is segmented（L1）It is segmented with second channel（L2）, it is characterised in that：The first passage segmentation（L1）And second channel Segmentation（L2）Between be equipped with accommodating spool（2）Valve chamber, the spool（2）Inside offer the axial passage for penetrating through its both ends, institute State spool（2）Outer wall be equipped with three axially symmetric planes, offered and the axial passage in each plane The radial direction duct of connection（T3）；3 radial direction ducts（T3）The sum of aperture be more than the hole of the axial passage either end Diameter, the aperture of the axial passage wherein one end are more than the radial direction duct（T3）Aperture, the axial passage other end Aperture is less than the radial direction duct（T3）Aperture.

2. throttle valve according to claim 1, it is characterised in that：The radial direction duct（T3）Mutual angle is 120°。