CN201034194Y

CN201034194Y - Tyre explosion-proof security valve

Info

Publication number: CN201034194Y
Application number: CNU2007200315026U
Authority: CN
Inventors: 李忠林
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-30
Filing date: 2007-03-30
Publication date: 2008-03-12
Anticipated expiration: 2017-03-30

Abstract

The utility model relates to a blasting-prevention safety valve for tires which is an accessory for mounting on the tire valve, comprising an upper valve body, a lower valve body and a valve spool. The utility model is characterized in that a bulge is arranged at the middle of the internal end face of the lower valve body, and is able to prop against the tire valve stem, a plurality of air vents are positioned around the bulge; an air discharge hole is arranged at the upper of the upper valve body, the upper valve body is screwed with the lower valve body; the valve spool is composed of a spring seat with a boss in the middle, a spring with one end connected with the boss and a reversed valve core, the spring seat is covered on the air vents and forms air sealing with the air vents, the valve spool stem of the valve core is suspended reversely in the center of the spring, and the outer wall of the upper section of the valve spool and the inner wall of the upper valve body is sealed. The utility model has the advantages of having the auto depressurized function when the tire is over pressurized, and particularly preventing the risk of the tire from blasting when the pressure is lifting up during the vehicle running.

Description

The tire anti-explosion safety valve

Technical field

The utility model relates to a kind of tire valve annex, is specifically related to a kind of safety valve that prevents that Motor Vehicle is in operation and blows out because of inner pressure of tire is excessive.

Background technique

The basic structure of existing tire valve promptly is made up of valve and valve inside as shown in Figure 4.After tire was full of gas, gas can not be overflowed from valve automatically.People know that when vehicle was run at high speed, especially in summer, automobile tire and pavement friction can make inner pressure of tire raise on highway, and what state inner pressure of tire is elevated at a moment in time, and the driver can't know.When the tire internal air pressure continue to raise surpassed a certain pressure value that tire can bear, tire will explosion, thereby security incident takes place.The traffic accident that takes place because of blowing out has been of common occurrence.

The model utility content

The purpose of this utility model is to provide a kind of safety valve that can prevent that Motor Vehicle is in operation and rises too high and blow out because of inner pressure of tire.

The technological scheme that realizes above-mentioned purpose is: a kind of tire anti-explosion safety valve, it is made up of upper valve body, following valve body and spool.The following bead of described down valve body is the interface with tire valve, is equipped with a projection towards the following valve body interior edge face interposition of valve interface, and this projection can be inconsistent with the tire valve core bar, and a plurality of vents are arranged around described projection.An exhaust port is arranged at the top of described upper valve body, and upper valve body spins with following valve body.Described spool is made up of spring and an inverted valve inside that spring seat, an end cover of boss is connected on the boss a centre, the lower end cover of described spring seat is on described vent, and form hermetic seal with vent, valve core rod on the valve inside is hung spring central authorities by the feet, its lower end is in top appropriate location, the epimere outer wall of spool and the inwall hermetic seal of upper valve body of spring seat boss.

The working principle of the utility model safety valve is as described below:

After above-mentioned safety valve is screwed on the tire valve, the projection of following valve body will be pushed up the valve core bar downwards, opens tire valve, at this moment, it is formed in conjunction with cavity that valve body was connected the back under gas in the tire will be full of with tire valve, and air pressure and inside tires is consistent.If the tire internal air pressure is too high, exceed the specified safety pressure of safety valve inner spring, vent under gas will pass through on the valve body has dashed spring seat, and the boss on the spring seat will open spool air flue end cap by the jack-up valve core rod, and the gas in the tire is just discharged from exhaust port by the spool air flue; When gas discharge a certain amount of after, when air pressure dropped to specified safe air pressure, spring seat fell and covers vent, spool air flue end cap is also covered the spool gas port by resilience.This safe exhaust process will be finished when tire and ground friction raise the tire internal air pressure to surpass rated pressure in vehicle operating automatically.

Therefore, the utlity model has too high to inner pressure of tire and function automatic step-down, the danger that the vehicle in especially can avoiding travelling is blown out because of inner pressure of tire rises too high is for traffic safety provides certain guarantee.In addition, the utility model is simple in structure, installs on the tire valve also very convenient.

Description of drawings

Fig. 1 is an embodiment's of the utility model a structural representation.

Fig. 2 is the plan view of following valve body among Fig. 1.

Fig. 3 is the situation schematic representation that the utility model and tire valve link together.

Fig. 4 is existing tire valve structural drawing.

Among the figure: 1. descend valve body, 2. projection, 3. vent, 4. valve interface, 5. upper valve body, 6. exhaust port, 7. spring seat, 8. spring, 9. valve core rod, 10. spool air flue, 11. spool air flue end caps, 12. in conjunction with cavity, 13. boss.

Embodiment

Below in conjunction with embodiment's accompanying drawing the utility model is further specified.

Fig. 1 and Fig. 2 have clearly illustrated structure of the present utility model and shape, and Fig. 3 also shows the situation that the utility model safety valve and tire valve link together.Can be clear that by Fig. 3, after safety valve is screwed on the tire valve, the projection 2 of following valve body 1 just the core bar of valve top down, open tire valve, make gas in the tire flow into down valve body and is connected afterwards formedly in conjunction with in the cavity 12 with tire valve, the air pressure in conjunction with air pressure in the cavity 12 and inside tires is consistent at this moment.If the air pressure in the tire does not surpass the pressure that safe spool medi-spring 8 sets, so, gas just can not dash spring seat 7, and the spring seat of this moment still keeps the capping state to vent 3, this state that Fig. 3 shows just.And when the tire internal air pressure too high, when exceeding the specified safety pressure of spring 8, vent 3 under gas will pass through on the valve body has dashed spring seat 7, and the boss 13 on the spring seat will open spool air flue end cap 11 by jack-up valve core rod 9, and the gas in the tire just passes through spool air flue 10 from exhaust port 6 discharges.

The plan view of valve body shows under Fig. 2 four vents on it.The number of vent also can be one, two, three, five or more a plurality of, and what are suitable actually, should decide according to the processing complexity and the behaviour in service of these parts.The best hole count of present embodiment is four.

Valve inside described in the utility model is the core body in the tire valve of the prior art.

In the embodiment shown in fig. 1, exhaust port 6 is positioned on the upper portion side wall of upper valve body.It can certainly be arranged on the upper end portion of upper valve body.

Claims

1. tire anti-explosion safety valve, it is characterized in that: it is made up of upper valve body, following valve body and spool, the following bead of described down valve body is the interface with tire valve, following valve body interior edge face interposition towards the valve interface is equipped with a projection, this projection can be inconsistent with the tire valve core bar, and a plurality of vents are arranged around described projection; An exhaust port is arranged at the top of described upper valve body, and upper valve body spins with following valve body; Described spool is made up of spring and an inverted valve inside that spring seat, an end cover of boss is connected on the boss a centre, the lower end cover of described spring seat is on described vent, and form hermetic seal with vent, valve core rod on the valve inside is hung by the feet in spring central authorities, its lower end is in top appropriate location, the epimere outer wall of spool and the inwall hermetic seal of upper valve body of spring seat boss.

2. according to the described a kind of tire anti-explosion safety valve of claim 1, it is characterized in that: the vent around the described valve body interior edge face intermediate projections down is four.

3. according to claim 1 or 2 described a kind of tire anti-explosion safety valves, it is characterized in that: described exhaust port is positioned on the upper portion side wall of upper valve body.

4. according to claim 1 or 2 described a kind of tire anti-explosion safety valves, it is characterized in that: described exhaust port is positioned at the upper end portion of upper valve body.