CN201953526U - Check valve for drainage and dust discharging port of automobile engine - Google Patents

Abstract

The utility model discloses a one-way valve for the drainage and dust discharge port of an automobile engine air intake system, which is assembled at the drainage and dust discharge port, and its structural composition includes a valve shell, a bottom cover, a guide sealing ring and a float. The one-way valve is tightened by the aid of liquid buoyancy and engine vacuum. When it is closed, the sealing effect is good and there is no possibility of leakage. It realizes the one-way conduction function and is controlled by natural conditions, and the opening and closing are sensitive and free. Inexpensive, effectively prevents water from entering the engine when the vehicle is wading.

Description

One-way valve for exhaust and dust outlet of automobile engine air intake system

technical field

The utility model relates to a valve fitting for a vehicle, in particular to a one-way valve for a drain and dust outlet of an automobile engine air intake system.

Background technique

When the vehicle is wading, if water enters the engine, it will cause the vehicle to stall, and even cause serious consequences of scrapping. The root cause is that liquid water is sucked back at the position of the drainage and dust discharge hole, which belongs to the lowest point of the intake system. . When designing the air intake system of a car, drainage and dust discharge holes are generally set at the lowest point of the intake pipe. This hole is used to discharge impurities deposited in the intake pipe due to cleaning the vehicle. The front part of the car is relatively low. When the vehicle is wading, when the water level submerges the position of the drain hole, under the vacuum of the engine, the hole will directly become the water inlet hole from the drain hole.

The Chinese utility model patent No. ZL2009200330059 discloses a vehicle exhaust pipe anti-water ingress device, which has a double air outlet pipe with a ball valve wrapping shell connected to the exhaust port. The ball valve wrapping shell is equipped with a A three-way ball valve controlled by a stepping motor connected to the inlet pipe of the pipeline, a small centrifugal turbine gas compressor with an inlet pressure exhaust pipe and an ordinary drain pipe with a water sensor on the lower wall are respectively connected to the two outlets of the pipeline . The product patent uses the control circuit and water sensor to automatically and timely control the ball valve to realize ordinary exhaust and supercharged exhaust, so as to prevent the phenomenon of water entering the engine intake system when the car is wading. This product needs to consume electric energy, has a complex structure and high cost, so it is not suitable for promotion.

In the existing automobile products, there is a safety valve assembled on the fuel tank. Its composition includes a valve housing, double springs, spring housing, plastic baffle, gravity ball, bottom cover, etc. assembled in sequence. The closing of the valve is It is controlled by spring force plus liquid buoyancy, which has the following disadvantages:

i. The consistency of the spring elasticity is poor, and the quality control is difficult;

ii. When the liquid buoyancy plus the spring force are in the critical state of closing, the vehicle will sway from side to side due to the vibration of the vehicle and cause leakage, so that the liquid is directly sucked into the engine, and the effect of preventing the liquid from sucking back cannot be guaranteed;

iii. The structure of the valve is complex, and the number of component parts is large and the cost is too high.

Contents of the invention

The technical problem to be solved by the utility model is to provide a one-way valve for the drainage and dust outlet of the automobile engine air intake system, which is tightened by the aid of the buoyancy of the liquid and the vacuum degree of the engine, and has a good sealing effect and no possibility of leakage when closed. Simple and low cost.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A one-way valve for the drainage and dust discharge port of the automobile engine air intake system, which is assembled at the drainage and dust discharge port of the vehicle intake system, including a valve housing and a bottom cover, the bottom cover is fixed on the bottom of the valve housing, and the valve chamber is between the two. The one-way valve also includes a guide sealing ring and a float, wherein

The umbrella-shaped guide seal ring is set in the valve cavity, and its umbrella rod extends downwards out of the valve cavity through the center hole of the bottom cover. The umbrella top of the guide seal ring is a spherical crown with a thick middle and thin surroundings, and its upper surface is a spherical surface. , the size of the umbrella top is between the water inlet of the shell and the inner diameter of the shell. When the umbrella top moves upwards, it is spherically sealed with the valve port;

There are at least two water inlet holes in the center of the upper ring of the base, and the circle circumscribed with the outer edge of the water inlet hole, that is, the circumscribed circle and the center of the circle where the radial maximum dimension of the umbrella top is located on the same central axis, and the diameter smaller than the latter diameter;

The float is worn on the umbrella pole and is located below the umbrella top. The projection of the radial profile of the float on the base falls on the same circle, and the diameter of this circle is 3/4 of the diameter of the circumscribed circle.

The above is the basic structure of the utility model. When in use, the one-way valve is assembled on the vehicle drainage and dust outlet through threads, which requires the thickness of the installation position to be at least 10mm, and the one-way valve cannot be inserted into the air intake system after installation. For the main pipeline, when the wading height of the vehicle submerges the position of the drain hole and is not higher than the position of the air inlet, water enters the valve cavity through the hole on the bottom cover to float the float, and pushes the guide sealing ring to move up to close the valve port. In addition to the buoyancy of the liquid, it also increases the auxiliary tightening of the vacuum degree of the engine to achieve a good closing effect; when the liquid height is at the height of the air inlet of the valve body, the area of the top of the float umbrella is larger than the outer edge of the water inlet hole on the bottom cover. position, and the channel on the valve housing is in the shielded position of the guide seal (a buffer zone for water flow is left on the upper part), so the float closes earlier than the water swims, and the guide seal recovers under the action of gravity after the wading is completed To achieve normal drainage function. The opening and closing of the umbrella top at the valve port of the utility model is completely controlled by natural conditions, and the opening and closing are sensitive and free. The overall structure of the one-way valve is simple, the cost is low, and water ingress can be effectively prevented.

As an optimization of the utility model, the shape of the valve casing is cylindrical, and the valve cavity is cylindrical; the weight of the umbrella-shaped guide sealing ring is enough to make it return to the normal position when subjected to zero buoyancy; the bottom cover and The bodies of the floats are all cylindrical.

Such a structural limitation facilitates processing and forming of components, easy quality control, high general performance, and low manufacturing cost; in addition, it is also conducive to the cooperation between various components.

Due to the adoption of the above-mentioned technical scheme, compared with the prior art, the technical progress of the utility model lies in: the utility model realizes the one-way conduction function, relies on natural conditions to control and is sensitive to opening and closing, and the overall structure of the one-way valve Simple, low cost, and effective protection against water ingress.

The utility model will be further described in detail in conjunction with the accompanying drawings and specific embodiments below.

Description of drawings

Fig. 1, Fig. 2 are the front view, the bottom view of the utility model embodiment respectively.

In the figure: 1—valve housing, 2—guiding sealing ring, 3—float, 4—bottom cover, 5—inlet hole, 6—valve port, 7—rod hole of float, 8—rod hole of bottom cover.

Detailed ways

Example

Figures 1 and 2 show a one-way valve for the drainage and dust outlet of the automobile engine air intake system. The upper interface has external threads, which are used to fit on the vehicle's drainage and dust outlet through thread fitting.

The one-way valve includes a valve casing 1 , a bottom cover 4 , a guide sealing ring 2 and a float 3 .

The cylindrical bottom cover 4 is clamped and fixed on the bottom of the cylindrical valve casing 1 , with a cylindrical valve cavity between them, and the radial dimension of the bottom cover 4 matches the valve cavity.

Umbrella guide sealing ring 3 is rubber material, is located in the valve chamber, and its cylindrical umbrella rod extends out of the valve chamber downwards through the rod hole 8 of the bottom cover that is located at the center of bottom cover 4 . The umbrella top of guide sealing ring 2 is the spherical crown that is thick all around in the middle, promptly whole is a part of spheroid, and its upper surface is a spherical surface, that is to say so the upper contour line in the longitudinal section shape of umbrella top is circular arc. The size of the umbrella top is larger than the size of the valve port 6 located in the valve cavity of the valve housing 1 and smaller than the radial size of the valve cavity. When the umbrella top moves upward and touches the valve port 6, it is enough to cover the valve port below the valve port 6. There is a spherical seal between the two.

Four inlet holes 5 are evenly distributed in the center of the upper ring of the base 4, and the circle where the outer edge of the inlet hole 5 is located and the center of the horizontal circle where the radial maximum dimension of the umbrella top is located are on the same central axis, and the diameter is smaller than the latter diameter.

The float passes through the umbrella pole and is located below the umbrella top. The projection of the radial profile of the float on the base falls on the same circle, and the diameter of this circle is 3/4 of the diameter of the circumscribed circle. The center of the float 3 is provided with a pole hole 7 of the float, and the shape and diameter of the hole 7 match the radial structure of the umbrella pole.

Claims (2)

1. an automotive engine air intake system draining dust exhaust port one-way valve is assemblied in vehicle intake system draining dust exhaust port place, comprises valve casing and bottom, bottom is fixed in the valve casing bottom, the two is a valve pocket, it is characterized in that: described one-way valve also comprises pilot seal circle and float, wherein

Umbrella shape pilot seal circle is located in the valve pocket, its umbrella bar stretches out outside the valve pocket downwards through the bottom center hole, the umbrella top of described pilot seal circle is spherical crown shape thin around the thick middle, its upper surface is a sphere, umbrella top size is between housing water intake and housing internal diameter, and umbrella pushes up when moving upward and valve port is a ball face sealing;

The ring center is furnished with at least two water inlets on the described base, be that circumcircle and umbrella push up radially that the overall dimensions place is positioned on the same central axis in the center of circle of circle with the mutually circumscribed circle of water inlet outer rim, and diameter is less than latter's diameter;

Described float is through on the umbrella bar, is positioned at below, umbrella top, and the float radial contour is on the projection on the base falls same circle, and this circular diameter is 3/4 of a described circumcircle diameter.

2. automotive engine air intake system draining dust exhaust port one-way valve according to claim 1, it is characterized in that: described valve casing profile is cylindrical, its valve pocket is cylindrical; The weight of umbrella shape pilot seal circle is enough to make it to be back to normal position downwards when being subjected to neutral buoyancy; The main body of described bottom and float is cylindrical.

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