CN1963272A - A flat check valve - Google Patents

Abstract

Translated fromChinese

本发明公开了一种平面式单向阀，属于单向阀技术领域，旨在提供一种加工方便、工作稳定性好、使用寿命长的高压液流控制用单向阀，本发明技术方案包括阀体和阀芯，阀体设有进液通道和出液通道，在进液通道内侧设有中部带通孔的阀座，阀座与阀芯通过弹簧压接，其中所述阀座的内端面为平面，阀芯的前端面为与阀座相对应的平面，且阀芯的前端面面积大于阀座的中部通孔的内端面面积并覆盖通孔。本发明的单向阀用于液压系统中的液流方向控制。

The invention discloses a planar check valve, which belongs to the technical field of check valves and aims to provide a check valve for high-pressure liquid flow control with convenient processing, good working stability and long service life. The technical scheme of the invention includes The valve body and the valve core, the valve body is provided with a liquid inlet channel and a liquid outlet channel, and a valve seat with a through hole in the middle is provided inside the liquid inlet channel, and the valve seat and the valve core are crimped by a spring, wherein the inner part of the valve seat The end face is a plane, and the front end face of the valve core is a plane corresponding to the valve seat, and the area of the front end face of the valve core is larger than the inner end face area of the middle through hole of the valve seat and covers the through hole. The one-way valve of the invention is used for liquid flow direction control in a hydraulic system.

Description

A kind of plane type one-way valve

Technical field

The present invention relates to a kind of one-way valve, refer in particular to a kind of plane type one-way valve that is used for the control of liquid flow path direction.

Background technique

One-way valve has purposes widely in hydraulic system.Traditional one-way valve structures, its valve core adopts the sphere or the conical surface usually, as the liquid current control of high-pressure system the time, because liquid stream has the pressure height (usually in the characteristics of 25MPa～600MPa), frequency fast (reaching usually more than 120 times/minute), frequent opening and closing action between spool and the valve seat, the as easy as rolling off a log inaccurate or Line of contact of contraposition that causes between valve seat and the spool weares and teares, and makes the sealing instability between the runner aperture of spool and valve seat; Show that by experiment the one-way valve of ordinary construction is a spheric structure as spool, only have an appointment 50,000 times following working life at the high pressure of 200MPa, and taper valve core is good slightly, is about 7.5 ten thousand times, all have short deficiency in working life.And in case spool or its working stability of prooving of valve seat considerable influence are difficult to maintenance again or change the component that damage, the one-way valve that can only more renew causes user cost high.

Summary of the invention

The technical problem to be solved in the present invention provides the plane type one-way valve of a kind of easy to process, good operating stability, long service life.

Technological scheme of the present invention is: a kind of plane type one-way valve, comprise valve body and valve core, valve body is provided with feed pathway and liquid outlet channel, be provided with the valve seat of middle part band through hole in the feed pathway inboard, valve seat and valve core are by the spring crimping, the interior edge face of wherein said valve seat is the plane, and the front-end face of valve core is and the corresponding plane of valve seat, and the front-end face area of valve core is greater than the interior edge face area of the middle part through hole of valve seat and cover through hole.

Spool front end described in above-mentioned a kind of plane type one-way valve is embedded with wear-resistant block, and described valve seat is embedded with wear-resisting body.

Wear-resistant block described in above-mentioned a kind of plane type one-way valve, wear-resisting body, with hardness height, the wherein a kind of of cubic boron nitride, Tungsten carbite, silicon carbide, polycrystalline diamond, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics or zirconia ceramics that wear resistance is good is good, can improve greatly its working life like this.

Valve body described in above-mentioned a kind of plane type one-way valve is formed to adopt two-part, and good by being threaded between its two-part; Described valve seat is a cylindrical body, and valve seat is fixed by the crimping of two-part valve body; Can be convenient for changing the spool and the valve seat of wearing and tearing like this.

Valve body described in above-mentioned a kind of plane type one-way valve is provided with the bulge loop with the valve seat crimping, can guarantee sealing and convenient processing between valve body and the valve seat like this, reduces the processing and the maintenance cost of spool and valve seat.

After the present invention adopts said structure,, in the working life that under same material, can improve one-way valve exponentially, reach 150,000 times following working life as high pressure at 200MPa by with changing plane crimping sealing between spool and the valve seat into; After further improving, by adopting materials such as cubic boron nitride, Tungsten carbite, silicon carbide, polycrystalline diamond, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics or zirconia ceramics, can reach the working life of one-way valve more than 1,000,000,000 times, significant to high pressure liquid stream control.

Description of drawings

Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but does not constitute any limitation of the invention.

Fig. 1 is the structural representation of a kind of specific embodiment of the present invention;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the decomposition texture schematic representation of Fig. 1;

Fig. 4 is the structural representation of the another kind of specific embodiment of the present invention;

Fig. 5 is the decomposition texture schematic representation of Fig. 4.

Among the figure: 1-valve body, 11-left valve barrel, 12-right valve barrel, 13-body, 14-gland, 2-valve core, 2a-wear-resistant block, 3-feed pathway, 4-liquid outlet channel, 5-valve seat, 5a-through hole, the wear-resisting body of 5b-, 6-spring, 7-bulge loop.

Embodiment

Embodiment 1

Consult Fig. 1 to shown in Figure 3, a kind of plane type one-way valve of the present invention, be straight check valve, comprise valve body 1 andvalve core 2, valve body 1 is provided with level to thefeed pathway 3 and theliquid outlet channel 4 that are communicated with, valve body 1 is made up of left valve barrel 11, right valve barrel 12 two-part, between left valve barrel 11, the right valve barrel 12 by being threaded; Crimping is fixed with thecylindrical valve seat 5 of middle part band throughhole 5a between left valve barrel 11, right valve barrel 12, on left valve barrel 11, right valve barrel 12, be equipped withbulge loop 7 withvalve seat 5 crimping, can directly the plane be processed onvalve seat 5 both sides like this and gets final product, to reduce processing and maintenance expenses; Be embedded with cylindrical wear-resistant block 2a atspool 2 front ends, be embedded with the wear-resistingbody 5b of pipe shape atvalve seat 5 middle parts, wear-resistant block 2a, wear-resistingbody 5b all adopt polycrystalline diamond manufacturing (also can adopt materials such as other superhard material such as cubic boron nitride, Tungsten carbite, silicon carbide, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics or zirconia ceramics); The wear-resistant block 2a front-end face area atvalve core 2 middle parts is greater than the throughhole 5a interior edge face area of the wear-resistingbody 5b invalve seat 5 middle parts, and the front-end face of wear-resistant block 2a is corresponding with the interior edge face of wear-resistingbody 5b, realizes the plane crimping byspring 6.

Embodiment 2

Consult shown in Figure 4, another kind of plane type one-way valve of the present invention, be the right-angle type one-way valve, comprise valve body 1 andvalve core 2, valve body 1 is provided withfeed pathway 3 and theliquid outlet channel 4 that direction is opposite and be communicated with, valve body 1 is made up ofbody 13,gland 14 two-part, betweenbody 13, thegland 14 by being threaded; Crimping is fixed with thecylindrical valve seat 5 of middle part band throughhole 5a betweenbody 13,gland 14, is equipped with thebulge loop 7 withvalve seat 5 crimping onbody 13,gland 14; Be embedded with cylindrical wear-resistant block 2a atspool 2 front ends, be embedded with the wear-resistingbody 5b of pipe shape atvalve seat 5 middle parts, wear-resistant block 2a, wear-resistingbody 5b all adopt stupalith manufacturings such as zirconium oxide (also can adopt materials such as other superhard material such as cubic boron nitride, Tungsten carbite, silicon carbide, polycrystalline diamond, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics); The wear-resistant block 2a front-end face area atvalve core 2 middle parts is greater than the throughhole 5a interior edge face area of the wear-resistingbody 5b invalve seat 5 middle parts, and the front-end face of wear-resistant block 2a is corresponding with the interior edge face of wear-resistingbody 5b, realizes the plane crimping byspring 6.

Concrete using method of the present invention is identical with traditional one-way valve, but because the sealing surface ofspool 2 andvalve seat 5 is designed to the plane, and by adopting the madespool 2 and thevalve seats 5 such as cubic boron nitride, Tungsten carbite, silicon carbide, polycrystalline diamond, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics or zirconium oxide class pottery of high hardness, high abrasion, solved traditional one-way valve and under high pressure or ultrahigh pressure, used deficiency unstable, that the life-span is short, prolonged the working life of one-way valve greatly.

Claims (5)

1. plane type one-way valve, comprise valve body (1) and valve core (2), valve body (1) is provided with feed pathway (3) and liquid outlet channel (4), be provided with the valve seat (5) of middle part band through hole (5a) in feed pathway (3) inboard, valve seat (5) passes through spring (6) crimping with valve core (2), the interior edge face that it is characterized in that described valve seat (5) is the plane, the front-end face of valve core (2) is and the corresponding plane of valve seat (5), and the front-end face area of valve core (2) is greater than the interior edge face area of the middle part through hole (5a) of valve seat (5) and cover through hole (5a).

2. a kind of plane type one-way valve according to claim 1 is characterized in that described spool (2) front end is embedded with wear-resistant block (2a), and described valve seat (5) is embedded with wear-resisting body (5b).

3. a kind of plane type one-way valve according to claim 2 is characterized in that described wear-resistant block (2a), wear-resisting body (5b) are the wherein a kind of of cubic boron nitride, Tungsten carbite, silicon carbide, polycrystalline diamond, silicon nitride ceramics, boron nitride ceramics, aluminium oxide ceramics or zirconia ceramics.

4. a kind of plane type one-way valve according to claim 1 and 2 is characterized in that described valve body (1) is made up of two-part, between two-part by being threaded; Described valve seat (5) is a cylindrical body, and valve seat (5) is fixed by two-part valve body (1) crimping.

5. a kind of plane type one-way valve according to claim 4 is characterized in that described valve body (1) is provided with and the bulge loop (7) of valve seat (5) crimping.

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