CN203516858U

CN203516858U - One-way valve

Info

Publication number: CN203516858U
Application number: CN201320561287.6U
Authority: CN
Inventors: 罗学荣
Original assignee: ZHEJIANG STRONGER HYDRAULIC CO Ltd
Current assignee: ZHEJIANG STRONGER HYDRAULIC CO Ltd
Priority date: 2013-09-10
Filing date: 2013-09-10
Publication date: 2014-04-02
Anticipated expiration: 2023-09-10

Abstract

The utility model provides a one-way valve, and belongs to the technical field of valves. The one-way valve solves the problem that when an existing one-way valve is used as a bypass valve, a valve element cannot reset easily in time. The one-way valve comprises a valve body, the valve body is provided with an inlet end and an outlet end, a valve element is arranged in the valve body, a spring is connected between the valve element and the valve body, a guide pillar is fixedly connected with the inner portion of the valve body, a guide connecting hole is formed in the valve element, the valve element is arranged on the guide pillar in a sliding mode through the guide connecting hole, a gap exists between the inner wall of the guide connecting hole and the outer wall of the guide pillar and the difference between the inner diameter of the guide connecting hole and the outer diameter of the guide pillar is 0.05mm-0.07mm. The one-way valve can avoid the problem that the opening degree of the valve element is too large, and therefore the valve element reset speed is improved.

Description

A kind of one-way valve

Technical field

The utility model belongs to valve technology field, relates to a kind of one-way valve.

Background technique

One-way valve claims again safety check or check valve, for hydraulic system, prevents oil stream reverse flow, or prevents pressurized air reverse flow for pneumatic system, and be the basic hydraulic element in hydraulic system, in various hydraulic systems, there are needs.One-way valve has two kinds of straight-through type and right-angle types, and straight check valve is arranged on pipeline with being threaded, and angle check valve is threaded, board-like connection is connected three kinds of forms with flange.

As Chinese practical new patent application (200920112116.9) discloses a kind of one-way valve, comprise valve head, plunger, spool and spring, the inside of valve head is provided with water inlet, osculum and plunger hole, water inlet and plunger hole coaxial communication, one end vertical connection of osculum and plunger hole, one end of plunger is provided with plunger endoporus, the main body of spool is inserted in plunger endoporus, the inside of spool is provided with for mounted elastically spool bore, the diapire axially locating of one end of spring and plunger endoporus, the diapire axially locating of the other end and spool bore, the part that spool exposes plunger endoporus has an external diameter diminishing cone shape working end from inside to outside, the shape of the inner shape of described plunger hole and the working end of described spool matches.Between the working end of described spool and the inner of described plunger hole, for face contacts, change line contact of the prior art into face contact, strengthened sealing.As above-mentioned one-way valve; flexible in order to guarantee valve core movement; on spool, generally can offer through hole; and the matching gap of spool and spring seat is larger; but in hydraulic system, often one-way valve cracking pressure can be strengthened, thereby use as back pressure valve; when also having some, as the bypass valve of filter, cooler etc.The spool that offers through hole starts moment in hydraulic system, its pressure may be higher, can be higher than the setting pressure of case of by-pass valve, now, because through hole draining and matching gap on spool are excessive, fluid can be washed spool open completely, and spool can not be resetted in time, like this, the fluid of hydraulic system has and relatively largely by this bypass valve, passes through, and working connection element can not be played a role completely as filter, cooler etc.

Summary of the invention

The purpose of this utility model is to have the problems referred to above for existing technology, has proposed a kind of one-way valve, and it is excessive that this one-way valve can avoid spool to open, and then improves the speed of valve core reset.

The purpose of this utility model can realize by following technical proposal: a kind of one-way valve, comprise valve body, described valve body has entrance point and outlet end, in valve body, be provided with a spool, between described spool and valve body, be connected with and can promote spool and move and make spool be resisted against on valve body the spring that forms sealing to entrance point, it is characterized in that, in described valve body, be fixed with a directional post, on described spool, offer a guiding attachment hole, spool is slidably located on directional post by guiding attachment hole, between described guiding attachment hole inwall and directional post outer wall, there is the gap of passing through for fluid, and the guiding internal diameter of attachment hole and the external diameter difference of directional post are 0.05mm～0.07mm.

One end of spool is abutment end, be used for damming, the other end is offered guiding attachment hole, the import of valve body, outlet, directional post and spool are all on same axis, valve core housing moves on directional post and along directional post, and when entrance point fluid pressure increases, spool Compress Spring is realized flow of fluid, when pressure diminishes, spring is replied and is made spool realize and damming against valve body; The gap forming between guiding attachment hole inwall and directional post outer wall is attachment hole inner chamber and the unique channel being communicated with of body cavity of leading, when spool moves, the fluid of guiding in attachment hole is merely able to pass through from this gap, and fluid can move cushion effect is provided spool during by this gap, when this gap is larger, fluid is by very fast, cushion effect is less, easily causes spool moment to open excessive, and this gap hour, fluid is difficult to circulate from gap, and excessive being difficult to of spool resistance moves; The guiding internal diameter of attachment hole and the external diameter difference of directional post have directly reflected the size in gap, when difference is 0.05mm～0.07mm, the buffering that the fluid of guiding in attachment hole produces during by gap, spool can not opened excessive, and spool can be resetted very soon under the double action of compensator or trimmer pressure and spring.

In above-mentioned one-way valve, in described valve body, be also fixed with a discoid spring seat, described directional post one end is vertically connected on spring seat side, and one end of described spring is pressed on spring seat, and the other end is pressed on spool.Directional post is vertically fixed on the home position of spring seat, and spring housing is located on directional post and end is pressed on spring seat.

In above-mentioned one-way valve, on described valve interior wall, there is a conical surface, described spool is resisted against on the valve body conical surface in the effect underpart of spring.The conical surface is positioned at valve body entrance point position, spool and the conical surface against time can form sealing, adopt the conical surface can prevent from accumulating on abutment facing particulate contamination.

In above-mentioned one-way valve, described valve body comprises public cover and mother set, and described public cover is threaded with mother set, and is provided with seal ring between the two, and above-mentioned entrance point is positioned at public affairs and puts, and outlet end is positioned in mother set.Facilitate assembling and the follow-up detachable maintaining of valve inner part to detect.

In above-mentioned one-way valve, on the outer side wall of described spring seat, there are two contiguous blocks, and be connected on mother set inwall by this two contiguous block.Two contiguous blocks are symmetrical arranged, between the remaining part of spring seat outer side wall and mother set inwall in order to pass through liquid.

Compared with prior art, this one-way valve has the following advantages:

1, because the gap forming between guiding attachment hole inwall and directional post outer wall is attachment hole inner chamber and the unique channel being communicated with of body cavity of leading, when therefore spool moves, fluid in guiding attachment hole is merely able to pass through from this gap, fluid can move cushion effect is provided spool during by this gap, spool can not opened excessive, and spool can be resetted very soon under the double action of compensator or trimmer pressure and spring.

Therefore 2, the abutment facing due to valve body and spool is the conical surface, can prevent from accumulating on abutment facing particulate contamination.

Accompanying drawing explanation

Fig. 1 is the structure sectional view of this one-way valve.

In figure, 1, valve body; 11, public cover; 111, entrance point; 12, mother set; 121, outlet end; 2, spool; 21, guiding attachment hole; 3, directional post; 4, spring; 5, spring seat; 51, contiguous block; 6, seal ring.

Embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As shown in Figure 1, a kind of one-way valve, comprises valve body 1, valve body 1 has entrance point 111 and outlet end 121, in valve body 1, be provided with a spool 2, between spool 2 and valve body 1, be connected with spring 4, this spring 4 can promote spool 2 and moves and make spool 2 be resisted against formation sealing on valve body 1 to entrance point 111.One end of spool 2 is abutment end, the other end is offered guiding attachment hole 21, in valve body 1, be fixed with a directional post 3, spool 2 is slidably located on directional post 3 by guiding attachment hole 21, and the import of valve body 1, outlet, directional post 3 and spool 2 are all on same axis, and spool 2 is enclosed within on directional post 3 and along directional post 3 and moves, when entrance point 111 fluid pressures increase, spool 2 Compress Springs 4 are realized flow of fluid, and when pressure diminishes, spring 4 is replied and made spool 2 realize and damming against valve body 1.Between guiding attachment hole 21 inwalls and directional post 3 outer walls, there is gap, this gap is guiding attachment hole 21 inner chambers and the unique channel being communicated with of valve body 1 inner chamber, fluid in guiding attachment hole 21 is merely able to pass through from this gap, fluid can move cushion effect is provided spool 2 during by this gap, when this gap is larger, fluid is by very fast, cushion effect is less, easily cause spool 2 moments unlatching excessive, and this gap hour, fluid is difficult to circulate from gap, excessive being difficult to of spool 2 resistances moves, the guiding internal diameter of attachment hole 21 and the external diameter difference of directional post 3 have directly reflected the size in gap, therefore the internal diameter of attachment hole 21 and the external diameter difference of directional post 3 of leading in the present embodiment is 0.06mm, the buffering that the fluid now leading in attachment hole 21 produces during by gap, spool 2 can not opened excessive, and spool 2 can be resetted very soon under the double action of compensator or trimmer pressure and spring 4.

Specifically, valve body 1 comprises public cover 11 and mother set 12, and public cover 11 is threaded with mother set 12, and be provided with seal ring 6 between the two, entrance point 111 is positioned on public cover 11, and outlet end 121 is positioned in mother set 12, facilitates the assembling of valve body 1 inner piece and follow-up detachable maintaining to detect.On the inwall of mother set 12, be fixed with a discoid spring seat 5, directional post 3 one end are vertically connected in the home position of spring seat 5 sides, and spring 4 is set on directional post 3 and end is pressed on spring seat 5, and the other end is pressed on spool 2.On public cover 11 inwalls, have a conical surface, spool 2 is resisted against on valve body 1 conical surface in the effect underpart of spring 4, spool 2 and the conical surface against time can form sealing, adopt the conical surface can prevent from accumulating on abutment facing particulate contamination.On the outer side wall of spring seat 5, there are two contiguous block 51, two contiguous blocks 51 and be symmetrical arranged, and be connected on mother set 12 inwalls by this two contiguous block 51, between the remaining part of spring seat 5 outer side walls and mother set 12 inwalls in order to pass through liquid.

Embodiment two:

The structure of this one-way valve and embodiment one are basic identical, and difference is, the guiding internal diameter of attachment hole 21 and the external diameter difference of directional post 3 are 0.05mm.

Embodiment three:

The structure of this one-way valve and embodiment one are basic identical, and difference is, the guiding internal diameter of attachment hole 21 and the external diameter difference of directional post 3 are 0.07mm.

Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although more used herein valve body 1, public cover 11, entrance point 111, mother set 12, outlet end 121, spool 2, guiding attachment hole 21, directional post 3, spring 4, spring seat 5, contiguous block 51 seal rings 6, etc. term, do not get rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.

Claims

1. an one-way valve, comprise valve body (1), described valve body (1) has entrance point (111) and outlet end (121), in valve body (1), be provided with a spool (2), between described spool (2) and valve body (1), be connected with and can promote spool (2) and move and make spool (2) be resisted against the upper spring (4) that forms sealing of valve body (1) to entrance point (111), it is characterized in that, in described valve body (1), be fixed with a directional post (3), on described spool (2), offer a guiding attachment hole (21), spool (2) is slidably located on directional post (3) by guiding attachment hole (21), between described guiding attachment hole (21) inwall and directional post (3) outer wall, there is the gap of passing through for fluid, and the internal diameter of guiding attachment hole (21) and the external diameter difference of directional post (3) are 0.05mm～0.07mm.

2. one-way valve according to claim 1, it is characterized in that, in described valve body (1), be also fixed with a discoid spring seat (5), described directional post (3) one end is vertically connected on spring seat (5) side, it is upper that one end of described spring (4) is pressed on spring seat (5), and the other end is pressed on spool (2).

3. one-way valve according to claim 1 and 2, is characterized in that, on described valve body (1) inwall, has a conical surface, and described spool (2) is resisted against on valve body (1) conical surface in the effect underpart of spring (4).

4. one-way valve according to claim 3, it is characterized in that, described valve body (1) comprises public cover (11) and mother set (12), described public cover (11) is threaded with mother set (12), and be provided with seal ring (6) between the two, it is upper that above-mentioned entrance point (111) is positioned at public cover (11), and outlet end (121) is positioned in mother set (12).

5. one-way valve according to claim 4, is characterized in that, has two contiguous blocks (51) on the outer side wall of described spring seat (5), and is connected on mother set (12) inwall by this two contiguous block (51).