CN208778374U - Zero leakage non-return valve and the lamination type guide check valves sub-assembly for using it - Google Patents

Abstract

A kind of non-return valve is espespecially applied to a kind of zero leakage non-return valve in oil hydraulic system field comprising a lifting head, a sealing ring and a valve seat；Wherein the sealing ring is engaged in the groove via one of lifting head one end groove is set to, and the part not being engaged in the groove is a protruding portion；Via a pressure, the surface of the protruding portion of the sealing ring and the valve seat can be made one of to form the face of combining closely and be turned on, when the pressure disappears, the protruding portion of the sealing ring and the surface of the valve seat form one and combine closely face, and the effect of reach check and zero leakage.The utility model further provides a lamination type guide check valves sub-assembly for using the zero leakage non-return valve.

Description

Zero leakage non-return valve and the lamination type guide check valves sub-assembly for using it

Technical field

The utility model system is espespecially applied to a kind of zero leakage non-return valve in oil hydraulic system field about a kind of non-return valve, It is combined closely via the sealing ring on lifting head with valve seat, and the effect of reach check and zero leakage.

Background technique

Non-return valve is also known as check-valves or check valve, and fluid (liquid or gas) is allowed only to flow through it in one direction Valve.

Usual non-return valve is by a lifting head (poppet), a valve seat (valve seat) and a spring (spring) institute Composition.And be that lifting head is enable to combine closely with valve seat, it is traditionally one end by lifting head in conjunction with valve seat, is designed as one Taper makes lifting head combine closely with valve seat by the taper of the taper, to reach the non-return valve that can make one-directional fluid flow.

In oil hydraulic system field, because of the environment of high temperature and high pressure, the taper part of lifting head is all metal with valve seat It is made, the environment of the high temperature and high pressure is fought with benefit；And the mating surface that taper part is contacted with valve seat, agree with mutually, and By fine grinding, therefore can combine closely;And at the beginning of use, it is such to design the effect of still reaching check, but two The mating surface of person's contact, because of the harder physical characteristic of metal material, in after a period of use, the two rub mutually and The effect of loss, causes not combining closely, leak fluid, check detracts for it.

The design of another non-return valve is that lifting head is designed as a sphere, by the combination of the sphere and valve seat, to be formed It can make the non-return valve of one-directional fluid flow.But it because the contact surface area of sphere and valve seat is smaller, is typically easy to leak, and makes The effect of check, detracts for it.

Utility model content

The purpose system of the utility model provides a kind of non-return valve, and espespecially a kind of zero leakage applied to oil hydraulic system field is inverse Only valve can not reach the problem of durable use and zero leakage to solve above-mentioned traditional non-return valve, and the zero leakage of the utility model is inverse Only valve system combines closely via the sealing ring on lifting head with valve seat, and the effect of reach check and zero leakage.

The zero leakage non-return valve of the utility model comprising:

One lifting head, one end are equipped with a groove;

One sealing ring, it is complementary with the groove shapes, and combined closely with lifting head through the groove, and the sealing ring with Its a part of height is engaged in the groove, and the part not being engaged in the groove is a protruding portion;

One valve seat is set to one end equipped with the groove of lifting head.

The sealing ring is engaged in the part height in the groove, is 3 to six/4ths points of the sealing ring total height Five, preferably 5/6ths;The height of the protruding portion is preferably 1/6th of the sealing ring total height.

The protruding portion of the sealing ring and the surface of the valve seat can form one and combine closely face.

A piston is pushed via a pressure, then the piston is by pushing the lifting head, and makes the protruding portion of the sealing ring It is turned on the face of combining closely of the surface formation of the valve seat;And the oil and his like that the pressure is guided by the zero leakage non-return valve Pressure produced by dynamic direction.

When the oil that the zero leakage non-return valve guides stops flowing in its flow direction, which disappears, by a spring Auxiliary, and make the protruding portion of the sealing ring and the surface of the valve seat forms the face of combining closely.

It is to generate deformation by the part that the pressure contacts the protruding portion of the sealing ring with the valve seat that this, which is combined closely, with Increase the surface area in the face of combining closely and reaches.

The sealing ring is hollow cylinder or other are suitable for generating the shapes in face of combining closely, and the thickness of the protruding portion Greater than the thickness or its consistency of thickness that the sealing ring is engaged in the inside grooves part.

The part that contacts the protruding portion of the sealing ring with the valve seat generates the pressure system 20 of deformation to 41MPa.

The sealing ring system is as made by plastic-steel or nylon;Wherein the sealing ring can bear 140 °C to 160 °C of temperature.

In addition, the utility model further provides a kind of drawing for zero leakage non-return valve with all features described above Lead check valve assembly.

It is compared with prior art, the zero leakage non-return valve of the utility model is engaged in the groove of lifting head it by some Sealing ring, and valve seat generate close combination, and then reach the environment suitable for oil hydraulic system field high temperature and high pressure, more resistant to The non-return valve of long use and the zero leakage for reaching higher standard.

Detailed description of the invention

Fig. 1 is the perspective view of the lifting head, sealing ring of the utility model preferred embodiment in conjunction with valve seat.

Fig. 2 is the perspective view that the lifting head of the utility model preferred embodiment is not yet engaged with sealing ring.

Fig. 3 is that the sealing ring of the utility model preferred embodiment is engaged in the groove of lifting head, and is engaged with lifting head Perspective view.

Fig. 4 be the utility model preferred embodiment the zero leakage non-return valve with all features described in the utility model it The exploded view of guide check valves sub-assembly.

The lamination type guide check valves sub-assembly with the utility model feature of Fig. 5 the utility model preferred embodiment Sectional view.

[symbol description]

1 zero leakage non-return valve

11 lifting heads

111 grooves

12 sealing rings

121 protruding portions

13 valve seats

2 lamination type guide check valves sub-assemblies

21 bolts

22 washers

23 springs

24 pistons

25 washers

P pumps Pu's oil-feed port

T oil return opening

V1 oiler

V2 oiler

C1 oil outlet

C2 oil outlet.

Specific embodiment

For the technical characteristic and effect of the utility model can be understood in detail, and can implement according to manual content, hereby into One step is described as follows with preferably specific embodiment.

According to one of the utility model embodiment, as shown in Figure 1, the zero leakage non-return valve 1 of the utility model is mentioned including one Dynamic head 11, a sealing ring 12 and a valve seat 13, when running, some of the sealing ring 12 is engaged in the zero leakage non-return valve 1 In the groove 111 (referring to fig. 2) of 11 one end of lifting head, another part is then exposed to except the groove 111, forms a protruding portion 121 (referring to Fig. 3)；By the auxiliary of a spring 23 (referring to fig. 4), it is bonded to the lifting head 11 of the sealing ring 12, via the protrusion The surface of portion 121 and valve seat 13 generates one and combines closely face.This combine closely face by sealing ring the protruding portion and the valve seat The part of contact generates deformation, is reached with increasing the surface area combined closely.And face formation of combining closely can make fluid The non-return valve of one-way flow, and then the effect of reach the utility model check and zero leakage.

As shown in Fig. 2, the lifting head 1 of the utility model is a cylindrical body, one end is equipped with a groove 111, the groove 111 Interior shape is complementary with the shape of sealing ring 12, and some height of the sealing ring 12 are engageable in the groove 111.

As shown in figure 3, the groove 111 that the lifting head 1 of the utility model is equipped with via one end, makes one of sealing ring 12 portion Part height is engaged in the groove 111.

The sealing ring 12 is engaged in the part in the groove 111 highly, be 12 total height of sealing ring six/ Five.The sealing ring 12 is hollow cylinder or other are suitable for generating the shapes in face of combining closely, and the thickness of the protruding portion 121 Greater than the thickness or its consistency of thickness that the sealing ring 12 is engaged in part in the groove 111.

12 system of sealing ring can be consequently adapted to oil hydraulic system field as made by plastic-steel or nylon with high temperature resistant and high pressure Required high temperature and hyperbaric environment.The pressure that plastic-steel can be born is 20/35MPa, EN ISO 604.The pressure that nylon can be born is 24/41MPa, EN ISO 604.The temperature that plastic-steel can be born is 100 to 140 °C.The temperature that nylon can be born is 100 to 160 ° C。

As shown in figure 4, the zero leakage non-return valve of the utility model can be applied in guide check valves sub-assembly, such as replace Non-return valve in the lamination type guide check valves sub-assembly of tradition.

As shown in figure 5, in the lamination type guide check valves sub-assembly 2 of the present invention, oily (or fluid) is from V1 (oiler) After, the pressure that oily (or fluid) provides in chamber can push the lifting head 11 in left side open, and make the sealing ring in left side The face unlatching of combining closely of the surface formation of 12 protruding portion 121 and the valve seat 13, then oily (or fluid) is another by one The left side open C 1 (oil outlet) at end flows out;And when oily (or fluid) enters chamber from V1, oily (or fluid) provides it Pressure simultaneously can push the direction on piston 24 toward the right open, thus push the lifting head 11 on right side open, and make the sealing ring on right side Face unlatching of combining closely of the surface formation of 12 protruding portion 121 and the valve seat 13, so that being opened from the left side of the other end Mouthful C1 outflow is oily (or fluid), flows into chamber by the right openings C2 (oil outlet) of an other end, last oil (or fluid) from V2 (oiler) outflow.

Vice versa, if oily (or fluid), after V2 entrance, the pressure that oily (or fluid) provides in chamber can be pushed open The lifting head 11 on right side, and keep this of the protruding portion 121 of the sealing ring 12 on right side and the surface formation of the valve seat 13 close Faying face is opened, and then oily (or fluid) is flowed out by the right openings C2 of an other end;And when oily (or fluid) enters chamber from V2 When room, pressure that oily (or fluid) provides while the direction on piston 24 toward the left side can be pushed open, thus mentioning on the left of pushing open Dynamic head 11, and open the protruding portion 121 of the sealing ring 12 in left side and the face of combining closely of the surface formation of the valve seat 13 It opens, so that it is oily (or fluid) from the right openings C2 of other end outflow, chamber is flowed by the left side open C 1 of an other end, Last oil (or fluid) is flowed out from V1.

After oily (or fluid) no longer enters from V1 or V2, the left side open C 1 of the other end and the right side of the other end The circuit of open C 2 is closed, pressure produced by oily (or fluid) at the left side open C 1 and right openings C2 of the other end, By spring 23 push lifting head 11 so that the protruding portion 121 of the sealing ring 12 for the groove 111 being engaged on lifting head 11 with should The surface of valve seat 13 forms one and combines closely face.

Oily (or fluid) system flows into internal chamber through the aperture on lifting head 11, and then pushes lifting head 11, so that connecing It combines closely together in the protruding portion 121 of sealing ring 12 and the surface formation one of the valve seat 13 of the groove 111 on lifting head 11 Face.

Spring 23 then assists lifting head 11 mobile toward the direction of valve seat 13, when oil (or fluid) is come in from V1 or V2 it When pressure is greater than the pressure of spring 23, lifting head 11 is open together with the sealing ring 12 for engaging thereon;23 institute of spring at this time The pressure of offer is known as lifting head 11 and is pushed or the pressure of unlatching.

The definition of its " zero leakage " word described in the utility model is using ANSI/FCI 70-2 1976 (R1982) The standard of CLASS VI:

Wherein, the liquid of test is air or nitrogen;

Pressure system is less than 50 psig or operating pressure.

It leaks the limit (leakage limit) system and depends on valve size, for the valve having a size of 1 to 8 English inch, Range is 0.15 to 6.75 milliliter per minute, as shown in Table 1:

Table one:

The range that zero leakage non-return valve of the present invention can be applied, is included in the feelings for needing long-time holding position and preventing from falling It is used in condition, such as:

1. reservoir strobe: after gate is opened using oil hydraulic system, needing to keep it turned on for a long time and prevent gate from falling Under.

2. hydraulic elevators system: such as unmanned to use when elevator, which reaches, to be positioned, then holding position and not when must be long It can fall.

3. any machinery using oil hydraulic system: such as printing machinery, the source of usual printing paper are a big roll papers, It is not available manpower to lift, just may require that in this situation and lifted roll paper using oil hydraulic system, and keep roll paper position for a long time It cannot land.

Embodiment in summary is only the preferred embodiment of the utility model, not does any shape to the utility model Limitation in formula, any those of ordinary skill in the art, if not departing from the proposed technical solution of the utility model Range in, using the equivalent embodiment for locally changing or modifying made by the utility model disclosed technology content, and not It is detached from the technical solution content of the utility model, in the range for still falling within technical solutions of the utility model.

Claims (9)

1. a kind of zero leakage non-return valve, which is characterized in that the zero leakage non-return valve includes:

One lifting head, one end are equipped with a groove;

One sealing ring, it is complementary with the groove shapes, and combine closely through the groove with lifting head, and the sealing ring is with one Part is highly engaged in the groove, and the part not being engaged in the groove is a protruding portion;

One valve seat is set to one end equipped with the groove of lifting head.

2. zero leakage non-return valve according to claim 1, wherein the height of the protruding portion is the six of the sealing ring total height / mono-.

3. zero leakage non-return valve according to claim 1, the wherein surface shape of the protruding portion of the sealing ring and the valve seat It combines closely face at one.

4. zero leakage non-return valve according to claim 3, wherein making the protrusion of the sealing ring via the promotion of a pressure The face of combining closely that portion and the surface of the valve seat are formed is turned on, and the pressure guides it by the zero leakage non-return valve Pressure produced by the flow direction of oil.

5. zero leakage non-return valve according to claim 4, wherein the pressure is via pushing a piston, and is pushed by the piston The lifting head, and it is turned on the protruding portion of the sealing ring and the face of combining closely of the surface formation of the valve seat.

6. zero leakage non-return valve according to claim 4, wherein when the oil that the zero leakage non-return valve guides is flowed in it When direction stops flowing, by the auxiliary of a spring, and it is close so that the protruding portion of the sealing ring and the surface of the valve seat is formed this Faying face.

7. zero leakage non-return valve according to claim 2, wherein the sealing ring is hollow cylinder.

8. zero leakage non-return valve according to claim 2, wherein the thickness of the protruding portion is engaged in this greater than the sealing ring The thickness of inside grooves part.

9. a kind of using according to claim 1 to the lamination type guidance check of zero leakage non-return valve described in 7 any claims Valve assembly.