CN205605903U

CN205605903U - Pressure -limiting valve

Info

Publication number: CN205605903U
Application number: CN201620387589.XU
Authority: CN
Inventors: 孙留红; 黄意群; 黄天; 黄天一
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-05-03
Filing date: 2016-05-03
Publication date: 2016-09-28
Anticipated expiration: 2026-05-03

Abstract

The utility model relates to a pressure -limiting valve, which comprises the following components: a valve body, be equipped with the cavity in the valve body, the one end tip of valve body is equipped with the air inlet that communicates with the cavity, the lateral part of valve body is equipped with the gas vent that communicates with the cavity, be equipped with the disk seat on the inner wall of air inlet, be equipped with on the disk seat and be used for the cavity, the case that air inlet and gas vent are kept apart respectively, be equipped with the push rod in the cavity, the both ends difference butt valve body inner wall and the case of push rod, the middle part of push rod is equipped with the boss of butt valve body inner wall, it is equipped with the spring still to overlap on the push rod, the both ends difference butt boss and the valve body inner wall of spring, the case is equipped with the partition portion that extends to the valve body inner wall with one side of push rod butt, separate inferior officer's cavity and separate into first chamber and second chamber, still be equipped with the depressed part on the valve body inner wall, when the case removal made air inlet and gas vent pass through the cavity intercommunication, first chamber and air inlet passed through the depressed part intercommunication. The utility model has the advantages of simple structure, it is convenient to make, stabilizes the pressure release.

Description

Pressure limiting valve

Technical field

This utility model relates to pressure limiting valve, particularly relates to a kind of automobile tire for being integrated on automotive hub Pressure limiting valve.

Background technology

Automobile is in motion due to long-time high-speed cruising, and tire can rise rapidly because of the severe friction with ground Temperature, thus cause pressure of tire to improve, easily cause the accident of blowing out, it is therefore desirable to pressure limiting is set on tire Air pressure is limited by valve, automatically releases partial high pressure gas when air pressure is too high and reduces pressure, it is ensured that tire Keep certain air pressure, existing tire pressure limiting valve mostly simple in construction, react when pressure release will be started Blunt, when starting pressure release, pressure release speed causes loss of tyre pressure, the most serious use having influence on pressure limiting valve soon In the life-span, also tire is adversely affected.

Utility model content

This utility model provides a kind of pressure limiting valve, to solve above-mentioned technical problem.

In order to achieve the above object, the technical solution of the utility model is achieved in that pressure limiting valve, including Valve body, is provided with cavity in described valve body, the end, one end of described valve body is provided with the air inlet connected with described cavity Mouthful, the sidepiece of described valve body is provided with the air vent connected with described cavity, and the inwall of described air inlet is provided with Valve seat, described valve seat is provided with the spool for cavity, air inlet and air vent being individually insulated, described sky Intracavity is provided with push rod, and the two ends of described push rod abut described valve interior wall and described spool, described push rod respectively Middle part be provided with the boss abutting described valve interior wall, described push rod is also arranged with spring, described spring Two ends abut described boss and valve interior wall respectively, and the side that described spool abuts with described push rod is provided with extension To the separating part of described valve interior wall, described cavity is separated into the first chamber and the second chamber, institute by described separating part State and on valve interior wall, be additionally provided with depressed part；Described air inlet and described air vent is made to pass through when described spool moves During cavity connection, described first chamber is connected by depressed part with described air inlet.

Further, described valve body is communicated with described first chamber and the flexible pipe in the second chamber, when described spool Mobile when making described air inlet be connected by cavity with described air vent, described flexible pipe is sequentially communicated, close and Connect described first chamber and the second chamber.

Further, the cross section of described separating part is annular.

Further, described separating part is provided with, away from one end of described spool, the ring fitted with described valve interior wall The sealing block of shape.

Further, described valve interior wall is provided with groove with the contact surface of described spool.

Further, described groove is between described valve seat and described air vent.

Further, 5-8 times of a diameter of described diameter of outlet of described air inlet.

Compared with prior art, the utility model has the advantage of: the pressure limiting valve in this utility model, pass through Spool is provided with the separating part extending to valve interior wall and valve body internal cavity is separated into two cavitys, at spool By air inlet directional pressure excessive mobile time, be interconnected between these two cavitys and close, simultaneously this two Individual cavity is also interconnected with air inlet, so that air pressure reaches balance, improves the stability of valve body, keeps away Exempt from when air inlet air pressure rises rapidly, to cause unexpected the upspringing and reset of spool, simultaneously when pressure slowly rises Slowly air pressure can be released, there is good pressure release sensitivity.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model detailed description of the invention or technical scheme of the prior art, under The accompanying drawing used required in detailed description of the invention or description of the prior art will be briefly described by face, aobvious and Easily insight, the accompanying drawing in describing below is embodiments more of the present utility model, skill common for this area From the point of view of art personnel, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings Accompanying drawing.

Fig. 1 is the structural representation of this utility model embodiment；

Fig. 2 is this utility model embodiment process schematic one when pressure release；

Fig. 3 is this utility model embodiment process schematic two when pressure release；

Fig. 4 is this utility model embodiment process schematic three when pressure release.

In figure: 1, valve body；2, cavity；21, the first chamber；22, the second chamber；3, air inlet；4、 Air vent；5, valve seat；6, spool；7, push rod；8, boss；9, spring；10, separating part；11、 Depressed part；12, flexible pipe；13, sealing block；14, groove.

Detailed description of the invention

Technical scheme below with reference to accompanying drawing embodiment each to this utility model carries out clear, complete description, Obviously, described embodiment is only a part of embodiment of the present utility model rather than whole enforcement Example.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work All other embodiments obtained by the premise of, broadly fall into the scope that this utility model is protected.

In description of the present utility model, it should be noted that term " " center ", " on ", D score, " left ", The orientation of the instruction such as " right ", " vertically ", " level ", " interior ", " outward " or position relationship are for based on accompanying drawing institute The orientation shown or position relationship, be for only for ease of description this utility model and simplify description rather than instruction Or the hint device of indication or element must have specific orientation, with specific azimuth configuration and operation, because of This is it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " are only For descriptive purposes, and it is not intended that instruction or hint relative importance.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, art Language " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to It is to removably connect, or is integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be straight Connect connected, it is also possible to be indirectly connected to by intermediary, can be the connection of two element internals.For this For the those of ordinary skill in field, concrete in this utility model of above-mentioned term can be understood with concrete condition Implication.

Below by specific embodiment and combine accompanying drawing this utility model is described in further detail.

As shown in Figures 1 to 4, this utility model relates to a kind of pressure limiting valve, including valve body 1, in valve body 1 Being provided with cavity 2, the end, one end of valve body 1 is provided with the air inlet 3 connected with cavity 2, and the sidepiece of valve body 1 sets Having the air vent 4 connected with cavity 2, the inwall of air inlet 3 is provided with valve seat 5, valve seat 5 be provided with for The spool 6 cavity 2, air inlet 3 and air vent 4 three being individually insulated, is provided with push rod 7 in cavity 2, The two ends of push rod 7 abut valve body 1 inwall and spool 6 respectively, and the middle part of push rod 7 is provided with in abutting valve body 1 The boss 8 of wall, push rod 7 is also arranged with spring 9, and the two ends of spring 9 abut boss 8 and valve body 1 respectively Inwall, the side that spool 6 abuts with push rod 7 is provided with the separating part 10 extending to valve body 1 inwall, separating part Cavity 2 is separated into the first chamber 21 and the second chamber 22 by 10, and valve body 1 inwall is additionally provided with depressed part 11；When Spool 6 is moved when making air inlet 3 be connected by cavity 2 with air vent 4, the first chamber 21 and air inlet 3 Connected by depressed part 11；This pressure limiting valve is provided with by the side abutted with push rod 7 at spool 6 and extends to valve The separating part 10 of body 1 inwall, forms the first chamber 21 between separating part 10, spool 6 and valve body 1 inwall, The second chamber 22 is formed, when air inlet 3 between separating part 10, push rod 7, valve body 1 inwall and boss 8 When pressure increases, spool 6 overcomes the resistance of spring 9 sheathed on push rod 7 to move up, now air inlet 3 are connected by cavity 2 with air vent 4, and gas is discharged by air vent 4, thus reduces pressure, simultaneously First chamber 21 is connected with air inlet 3 by depressed part 11, and partial high pressure gas enters into the from depressed part 11 In one chamber 21, give the balance pressure that spool 6 one is downward, so that spool 6 promotes slowly, it is to avoid Air inlet 3 inner high voltage gas push spool 6 promotes rapidly, and the loss of part in reduction valve body 1, prolongation makes Use the life-span.

Preferably, valve body 1 is communicated with the first chamber 21 and flexible pipe 12 in the second chamber 22, when spool 6 moves Dynamic when making air inlet 3 be connected by cavity 2 with air vent 4, flexible pipe 12 is sequentially communicated, closes and connects the One chamber 21 and the second chamber 22；As in figure 2 it is shown, by being communicated with the soft of the first chamber 21 and the second chamber 22 Pipe 12, when at air inlet 3, gases at high pressure promote spool 6 to move up, separating part 10 is along with spool 6 Moving up, the first chamber 21 is connected with air inlet 3 by depressed part 11, the first chamber 21 and the secondth simultaneously Chamber 22 is connected by flexible pipe 12, and now gases at high pressure are also separately flowed into while being discharged by air vent 4 In the first chamber 21 and the second chamber 22, thus form balance pressure in the both sides up and down of spool 6, slow down valve The rate of climb of core 6, makes spool 6 slowly rise；As it is shown on figure 3, when gases at high pressure overcome spring 9 Continue to press on spool 6 with being flowed into the balance pressure that portion gas produces in the first chamber 21 and the second chamber 22 When rising, separating part 10 moves up and closed hose 12 along with spool 6, makes the first chamber 21 and the second chamber 22 Airtight separating, the balance pressure that the gas that now spool 6 receives when continuing to move up produces is not carrying Height, only need to overcome gas pressure in the elastic-restoring force of spring 9 and the second chamber 22 when spool 6 continues to move up Resistance during contracting；As shown in Figure 4, the balance pressure that spool 6 is subject to when spool 6 continues to move up is not Change again；When, after air inlet inner high voltage gas leakage, the elastic-restoring force of spring 9 promotes spool 6 to moving down Time dynamic, connect effect due to the first chamber 21 and the second chamber 22, make the upper and lower surface of spool 6 obtain air pressure Balance, makes spool 6 steadily reset.

Preferably, the cross section of separating part 10 is annular, and the cross-sectional area of separating part 10 is along with away from valve Core 6 is gradually increased thus abuts the inwall of valve body 1, makes separating part 10 pressure experienced along with away from spool 6 It is gradually increased, improves separating part 10 by lifting spool 6 stable during high-pressure gas pressure.

Preferably, separating part 10 is provided with, away from one end of spool 6, the annular sealing fitted with valve body 1 inwall Block 13, is opened and closes with the sealing block 13 that valve body 1 inwall is fitted to flexible pipe 12 by separating part 10 Close, it is ensured that spool 6 upper and lower surface obtains equilibrium air pressure, makes spool 6 move up and down in cavity 2 smoothly.

Preferably, valve body 1 inwall is provided with groove 14 with the contact surface of spool 6, and this groove 14 can make When spool 6 is lifted by slight pressure, gases at high pressure enter in groove 14, and by groove 14 from Air vent 4 is discharged, thus reduces the travel frequency of spool 6, extends the service life of spool 6.

Preferably, groove 14, between valve seat 5 and air vent 4, facilitates tire air pressure inside when heating up During of short duration increase, gases at high pressure slightly lift spool 6, and gases at high pressure are discharged through air vent 4 from groove 14.

Preferably, 5 times of a diameter of air vent 4 diameter of air inlet 3, it is possible to ensure in tire gas from Discharge from air vent 4 slowly, it is to avoid tire air pressure when of short duration intensification releases the tire that excessive velocities causes Decompression.

The above, be only preferred embodiment of the present utility model, not makees this utility model any Pro forma restriction, any those skilled in the art, without departing from technical solutions of the utility model model In enclosing, when the technology contents of available the disclosure above makes a little change or is modified to the equivalence of equivalent variations in fact Execute example, as long as being the content without departing from technical solutions of the utility model, according to technical spirit of the present utility model Any simple modification, equivalent variations and the modification being made above example, all still falls within this utility model skill In the range of art scheme.

Claims

1. a pressure limiting valve, including valve body, is provided with cavity in described valve body, it is characterised in that: described valve body End, one end be provided with the air inlet connected with described cavity, the sidepiece of described valve body be provided with and described cavity even Logical air vent, the inwall of described air inlet is provided with valve seat, described valve seat be provided with for by cavity, enter The spool that QI KOU and air vent three are individually insulated, is provided with push rod in described cavity, the two ends of described push rod are divided Not abutting described valve interior wall and described spool, the middle part of described push rod is provided with and abuts the convex of described valve interior wall Platform, described push rod is also arranged with spring, and the two ends of described spring abut described boss and valve interior wall respectively, The side that described spool abuts with described push rod is provided with the separating part extending to described valve interior wall, described separation Described cavity is separated into the first chamber and the second chamber by portion, and described valve interior wall is additionally provided with depressed part；When described Spool is moved when making described air inlet be connected by cavity with described air vent, described first chamber and described air inlet Mouth is connected by depressed part.

2. pressure limiting valve as claimed in claim 1, it is characterised in that: it is communicated with described the on described valve body One chamber and the flexible pipe in the second chamber, make described air inlet and described air vent by cavity even when described spool moves Time logical, described flexible pipe is sequentially communicated, closes and connects described first chamber and the second chamber.

3. pressure limiting valve as claimed in claim 2, it is characterised in that: the cross section of described separating part is annular.

4. pressure limiting valve as claimed in claim 3, it is characterised in that: described separating part is away from described spool One end is provided with the sealing block of the annular fitted with described valve interior wall.

5. pressure limiting valve as claimed in claim 4, it is characterised in that: described valve interior wall and described spool Contact surface is provided with groove.

6. pressure limiting valve as claimed in claim 5, it is characterised in that: described groove is positioned at described valve seat and institute State between air vent.

7. pressure limiting valve as claimed in claim 6, it is characterised in that: a diameter of described row of described air inlet 5-8 times of QI KOU diameter.