CN208651730U - A kind of pressure reducing valve - Google Patents

Abstract

The utility model discloses a kind of pressure reducing valves, shell including tubulose, shell both ends are respectively equipped with the first connecting portion to be connected with flow valve and the second connecting portion to be connected with pipeline, axially displaceable piston is equipped in shell, the first end of piston and the inner wall of flow valve seal and cooperate, and the inner wall of second end and shell, which seals, to be cooperated, and the cross-sectional area of second end is greater than first end, cavity is equipped between shell and second end, cavity is connected to flow valve；Main valve shell is additionally provided with to the elastic portion far from flow valve that pushes piston.A possibility that pressure reducing valve provided by the utility model can directly be connected with flow valve, connect without pipeline, can reduce the volume of hydraulic system, reduce leakage.In addition, the structure of pressure reducing valve is simple, it is identical as the direction of media flow that elastic portion is set to the periphery of piston, the axial direction of piston, keeps pressure reducing valve more compact, can further decrease the volume of hydraulic system.

Description

A kind of pressure reducing valve

Technical field

The utility model relates to hydraulic machinery technical field, in particular to a kind of pressure reducing valve.

Background technique

In drinking equipment etc., the instantaneous pressure of pipeline connection can easily exceed the limit that pipeline can bear, and hydraulic pressure is super Height causes pipe breakage, reduces the service life of drinking equipment, influences very much the normal use of consumer.Thus hydraulic system In pressure reducing valve can be set to prevent pipeline superpressure, pressure reducing valve is connected to flow valve by pipeline, this causes needed for hydraulic system Assembly space is larger, while also increasing the quantity of tie point in pipeline, and then a possibility that increase pipeline leakage.

Therefore, a possibility that how providing the volume for reducing hydraulic system, reduction hydraulic system leakage is art technology Personnel's technical issues that need to address.

Utility model content

The purpose of the utility model is to provide a kind of pressure reducing valves, can be directly installed on flow valve, connect without pipeline A possibility that connecing, reducing the volume of hydraulic system, reduce leakage.

To achieve the above object, the utility model provides a kind of pressure reducing valve, the shell including tubulose, the shell both ends It is respectively equipped with the first connecting portion to be connected with flow valve and the second connecting portion to be connected with pipeline, is set in the shell Have an axially displaceable piston, the first end of the piston and the inner wall of flow valve seal and cooperate, the second end with it is described The inner wall of shell seals cooperation, and the cross-sectional area of the second end is greater than the first end, between the shell and the second end Equipped with cavity, the cavity is connected to flow valve；The main valve shell is additionally provided with to push the piston far from flow valve Elastic portion.

Preferably, the first end is equipped with the first sealing ring, and second is equipped between the second end and the inner wall of the shell Sealing ring.

Preferably, the first end is cylindrical, and periphery is set there are two top land, and first sealing ring is set to Between two top lands.

Preferably, the second end is cylindrical, and periphery is set there are three the second ring bank, second sealing ring two, It is respectively arranged in the gap of the second ring bank.

Preferably, the first connecting portion is the card slot that can be connected with the clamping portion of flow valve.

Preferably, the piston is equipped with the overcurrent chamber axially extended, and the overcurrent chamber extends to described from the cavity Before first sealing ring, the flowing hole being connected on the outside of the piston with the overcurrent chamber is equipped with before first sealing ring.

Pressure reducing valve provided by the utility model includes the shell of tubulose, shell both ends be respectively equipped with to flow valve phase First connecting portion even and the second connecting portion to be connected with pipeline, equipped with axially displaceable piston, piston in shell First end and the inner wall of flow valve seal and cooperate, the inner wall of second end and shell, which seals, to be cooperated, and the cross-sectional area of second end is big Cavity is equipped between first end, shell and second end, cavity is connected to flow valve；Main valve shell is additionally provided with to push piston remote Elastic portion from flow valve.

The both ends of shell are connected with flow valve and pipeline respectively, and medium is flowed out from flow valve, via shell inflow line, are situated between There are pressure for matter, and since the cross-sectional area of piston second end is greater than first end, thus the pressure born of second end also greater than First end.When pressure medium increases, the pressure difference at piston both ends is also gradually increased, if the pressure difference at both ends is greater than the bullet of elastic portion Property power, piston is mobile to flow valve under the action of pressure difference, reduces the flowing space between flow valve and pressure reducing valve, flows into and subtracts The rate-of flow of pressure valve reduces, and the pressure medium into flow valve also declines therewith, until piston both ends pressure difference and elastic portion Elastic dynamic balance, piston stops movement, since the pressure of medium in pressure reducing valve does not exceed the elastic force of elastic portion, to guarantee The pipeline being connected with pressure reducing valve will not superpressure.

Pressure reducing valve is mounted on flow valve by the utility model, on the one hand hydraulic system structure can be made more compact, subtracted Volume shared by few hydraulic system；On the other hand the quantity of tie point in hydraulic system can be also reduced, hydraulic system hair is reduced The risk of raw leakage.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is the explosive view of pressure reducing valve provided by the utility model；

Fig. 2 is the cross-sectional view of pressure reducing valve and flow valve cooperation.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In order to make those skilled in the art more fully understand the utility model, with reference to the accompanying drawing and specifically The utility model is described in further detail for embodiment.

Fig. 1 and Fig. 2 are please referred to, Fig. 1 is the explosive view of pressure reducing valve provided by the utility model；Fig. 2 is pressure reducing valve and stream Measure the cross-sectional view of valve cooperation.

Pressure reducing valve provided by the utility model, as depicted in figs. 1 and 2, the shell 1 including tubulose, 1 both ends of shell difference For first connecting portion 11 and second connecting portion 12, first connecting portion 11 is connected with flow valve 4, second connecting portion 12 and hydraulic system Pipeline be connected.The modes such as shell 1 can be connected through a screw thread, flanged joint or clamping are connected with flow valve 4 or pipeline, and first connects Socket part 11 and second connecting portion 12 can be one or both of connection screw thread, connecting flange, fixture block or card slot.

Piston 2 is equipped in shell 1, piston 2 can be inserted into flow valve 4 along the axial movement of shell 1, first end 21 In connectivity port, and seals and cooperate with the inner wall of flow valve 4.The second end 22 of piston 2 and the inner wall of shell 1 seal and cooperate, the The end face at two ends 22 is equipped with cavity 23, and the diameter of cavity 23 is greater than first end 21, and cavity 23 is connected to flow valve 4, medium energy Enough flow into cavity 23.Due to sealing cooperation, second end 22 and shell 1 between the first end 21 of piston 2 and the inner wall of flow valve 4 Between seal cooperation, medium will not enter between first end 21 and second end 22, therefore the pressure of medium acts on first completely End 21 and second end 22 two end faces on, and due to the cross-sectional area of second end 22 be greater than first end 21, piston 2 by Towards the differential pressure action of flow valve 4.

Main valve shell 1 is additionally provided with the elastic portion 3 to the promotion piston 2 far from flow valve 4, and elastic portion 3 can be specially spring, The direction of elastic force is far from flow valve 4, and the pressure difference of medium is towards flow valve 4, the piston when pressure difference is greater than the elastic force of elastic portion 3 2 is mobile to flow valve 4, and the through-hole 41 of overcurrent is equipped in flow valve 4, and piston 2 can reduce fluid space close to through-hole 41, cause to be situated between The decline of mass flow amount；If pressure difference continues to increase, the end face of first end 21 is bonded with the edge of through-hole 41, then flow into medium can not Pressure reducing valve, until the pressure reduction of 22 medium of second end, piston 2 can just be again flowed into far from through-hole 41, medium.

In the present embodiment, shell 1 can be directly connected with flow valve 4 by first connecting portion 11, be connected without pipeline, can A possibility that reducing the volume of hydraulic system, reducing leakage.In addition, the structure of pressure reducing valve provided herein is simple, elasticity It is identical as the direction of media flow that portion 3 is set to the periphery of piston 2, the axial direction of piston 2, keeps pressure reducing valve more compact, Neng Goujin The volume of one step reduction hydraulic system.

Optionally, settable first sealing ring of first end 21, the first sealing ring guarantee the inner wall of first end 21 and flow valve 4 Sealing；Settable second sealing ring between second end 22 and the inner wall of shell 1.First sealing ring and the second sealing ring can be avoided Jie Matter enters between first end 21 and second end 22, guarantees that piston 2 only has the end face of first end 21 and second end 22 by axial pressure Power.First sealing ring and the second sealing ring can be specially rubber seal.

Optionally, first end 21 and second end 22 are cylindrical, and the periphery of first end 21 is equipped with top land, the first ring Bank is two, and the first sealing ring is set between two top lands；The periphery of second end 22 is equipped with the second ring bank, the second ring bank It is three, the second sealing ring two is respectively arranged in the gap of three the second ring banks.

In the present embodiment, first end 21 and second end 22 are respectively provided with the first sealing ring and the second sealing ring, avoid being situated between Matter enters between first end 21 and second end 22, improves the leakproofness at 2 both ends of piston, makes pressure reducing valve work is more stable can It leans on.

Optionally, first connecting portion 11 is the card slot of 1 inside of shell, and the connectivity port periphery of flow valve 4 is equipped with clamping block 42, shell 1 is sheathed on the periphery of 4 connectivity port of flow valve, and clamping block 42 is inserted into card slot, is clamped shell 1 and flow valve 4 solid It is fixed.To prevent medium close from also settable rubber seal, rubber on the inside of the junction of shell 1 and flow valve 4 leakage, shell 1 The sealing for realizing junction is fitted closely on the outside of seal and 1 inside of shell and flow valve 4.

It is engaged by clamping between pressure reducing valve and flow valve 4, the installation process of pressure reducing valve can be made more simple and efficient, reduce dress With the time.

Piston 2 is equipped with the overcurrent chamber 24 that axially extends, and overcurrent chamber 24 is located at the bottom of cavity 23, axially extends to the Before one sealing ring, flowing hole 25 is equipped with before the first sealing ring, flowing hole 25 is located at the side of first end 21, and connects with overcurrent chamber 24 It is logical, wherein towards the direction of flow valve 4 to be front.

Obviously, first end 21 is located at the diameter that the section diameter before the first sealing ring is less than flow valve 4, and medium can be from overcurrent Overcurrent chamber 24 is flowed into hole 25, eventually passes through cavity 23 and second connecting portion 12 enters in pipeline.

Shell 1 is equipped with necking part at the rear of second end 22, and necking part can carry out axial limiting to piston 2, and second connects Socket part 12 is located at the rear of necking part, and cylindrical, and second connecting portion 12 can be by way of being socketed or being threadedly coupled and pipe Line connection.

In the present embodiment, first connecting portion 11 is connected by way of clamping with flow valve 4, and second connecting portion 12 is in cylinder Shape, the mode for being connected through a screw thread or being socketed are connected with pipeline, and convenient for operation, connection procedure hardly needs any tool, contract The short assembly time of hydraulic system.

It should be noted that in the present specification, such as first and second etc relational terms are used merely to one Entity is distinguished with other several entities, and without necessarily requiring or implying between these entities, there are any this actual Relationship or sequence.

Pressure reducing valve provided by the utility model is described in detail above.Specific case used herein is to this The principle and embodiment of utility model is expounded, the above embodiments are only used to help understand the utility model Method and its core concept.It should be pointed out that for those skilled in the art, it is practical new not departing from this Under the premise of type principle, several improvements and modifications can be made to this utility model, these improvement and modification also fall into this reality With in novel scope of protection of the claims.

Claims (6)

1. a kind of pressure reducing valve, which is characterized in that the shell (1) including tubulose, shell (1) both ends be respectively equipped with to stream Valve (4) connected first connecting portion (11) and the second connecting portion to be connected with pipeline (12) is measured, is equipped in the shell (1) Axially displaceable piston (2), the first end (21) of the piston (2) and the inner wall of flow valve (4) seal and cooperate, second end (22) cooperate with the inner wall of the shell (1) sealing, the cross-sectional area of the second end (22) is greater than the first end (21), institute It states and is equipped with cavity (23) between shell (1) and the second end (22), the cavity (23) is connected to flow valve (4)；The shell (1) it is additionally provided with the elastic portion (3) to push the piston (2) separate flow valve (4).

2. pressure reducing valve according to claim 1, which is characterized in that the first end (21) is equipped with the first sealing ring, described The second sealing ring is equipped between second end (22) and the inner wall of the shell (1).

3. pressure reducing valve according to claim 2, which is characterized in that the first end (21) is cylindrical, and periphery is equipped with Two top lands, first sealing ring are set between two top lands.

4. pressure reducing valve according to claim 2, which is characterized in that the second end (22) is cylindrical, and periphery is equipped with Three the second ring banks, second sealing ring two are respectively arranged in the gap of three the second ring banks.

5. pressure reducing valve according to claim 4, which is characterized in that the first connecting portion (11) is can be with flow valve (4) the connected card slot (13) in clamping portion.

6. according to pressure reducing valve described in claim 2 to 5 any one, which is characterized in that the piston (2) is equipped with prolongs along axial direction The overcurrent chamber (24) stretched, before the overcurrent chamber (24) extends to first sealing ring from the cavity (23), described first is close The flowing hole (25) being connected on the outside of the piston (2) with the overcurrent chamber (24) is equipped with before seal ring.