JPS6111600Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a water supply and drainage valve in an internal combustion engine.

Conventionally, the cooling water passage or radiator inside the engine body has a water inlet at the upper end to inject the cooling water, and a drain tank at the lower end to drain the cooling water, but the cooling water does not flow inside the engine body. If the cooling water is injected from above the cooling water passage or radiator, the air in the cooling water passage or radiator inside the engine body will not be replaced sufficiently with the cooling water, and the air will flow into the cooling water passage inside the engine body. The problem is that it tends to remain in the parts or radiators.

On the other hand, conventionally, as shown in FIG. 3, a valve body mounting hole b is provided in the cooling water passage inside the engine body or the lower end of the radiator a, and the valve body mounting hole communicates with the main body water storage part c. A communicating hole d is formed, and a valve body f having an internal hole e intersecting in a T-shape at the tip is screwed into the valve body mounting hole b, and cooling water is supplied and drained from the internal hole e of the main body, It is known that the inner hole e is opened and closed by bringing the tip g of the valve body f into contact with and away from the step h between the valve body mounting hole b and the communication hole d, but the tip g of the valve body f is Since the strength is reduced by the T-shaped inner hole e, if the valve body f is screwed in too much when closing the inner hole e, the tip portion g may be deformed, resulting in poor sealing performance. There was a problem that water leaks easily.

In this invention, the valve body is formed as a tubular body with a water supply and drainage passage passing through it in the longitudinal direction, and a tapered seal part is formed at the tip, and this seal part intersects with the valve body mounting hole and connects to the main body water storage part. The present invention provides a structure of a water supply and drainage valve for an internal combustion engine in which the water supply and drainage passage is opened and closed by being brought into and out of contact with a concave valve seat on the inner wall of a communicating flow channel.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a valve body, and 2 is a cooling water passage inside the engine body or a radiator body. The valve body 1 is a tubular body having a linear water supply and drainage passage 3 penetrating in the longitudinal direction, and has a tapered sealing part 4 at the tip, a threaded part 5 on the outer periphery of the center, and a threaded part 5 on the outer periphery of the threaded part 5. A hexagonal head 6 is formed at the rear, and a mounting portion 7 for attaching a water supply hose is provided protruding rearward from the hexagonal head 6.
Reference numeral 8 denotes an annular packing fitted into the intermediate portion between the threaded portion 5 and the hexagonal head 6.

The cooling water passage inside the engine body or the radiator body 2 has a valve body mounting hole 10 at its lower end to which the valve body 1 is attached, and a valve body mounting hole 10 that intersects with the valve body mounting hole and communicates with the main body water reservoir (not shown). A flow channel 11 is formed, and a flow channel 1 that is an extension of the valve body mounting hole 10 is formed.
A concave valve seat 12 that follows the outer shape of the seal portion 4 of the valve body 1 is formed on the inner wall of the valve body 1 .

The valve body 1 is screwed into a cooling water passage inside the engine body or a valve body mounting hole 10 of a radiator, and the seal part 4 is brought into and out of contact with the valve seat 12 to form a water supply and drainage passage 3.
is opened and closed. That is, when draining the cooling water, the valve body 1 is moved back from the state where the seal portion 4 is in contact with the valve seat 12 as shown in FIG. 2, as shown in FIG. When the valve body 1 is separated a little further, the water supply and drainage passage 3 of the valve body 1 is opened, and through this water supply and drainage passage 3, the cooling water from the cooling water passage inside the engine body or the water storage portion of the radiator body 2 is discharged to the outside. When supplying cooling water, fit the water supply hose to the mounting part 7 of the valve body 1 in the state shown in FIG. Alternatively, water is supplied to the water storage section of the radiator main body 2.
At this time, the cooling water supply port (not shown) provided in the cooling water passage inside the engine body or at the top of the radiator body 2 is left open, and at the same time as water is supplied, the air in the main body's water reservoir is drained from the supply port. escape to the outside.
After water is supplied, the valve body 1 is again screwed into the valve body mounting hole 10 as shown in FIG. 1, the seal portion 4 is brought into contact with the valve seat 12 to close the water supply and drainage passage 3, and the water supply hose is removed.

As described above, this structure can be applied to all devices such as water pumps that require prevention of mixing of cooling water and air.

As described above, the present invention provides a water supply and drainage valve in the cooling water passage inside the engine body or in the lower end of the body that constitutes the cooling water passage in an internal combustion engine such as a radiator. Since the air in the water storage area can be released to the cooling water passage inside the engine body or above the radiator, cooling water can be supplied all at once under pressure, and by simply using the valve body as a tubular body, The strength of the valve body is high, and the tapered seal portion is brought into contact with and separated from the concave valve seat to open and close the water supply and drainage passage of the valve body, and there is no risk of the valve body being screwed in excessively during sealing, so the seal portion is It has the excellent effect of not causing deformation and having good sealing properties.

[Brief explanation of the drawing]

Figures 1 and 2 illustrate embodiments of the present invention, with Figure 1 being a sectional view of the main parts showing the state of the water supply and drainage valve when it is sealed, and Figure 2 being the main part showing the state of the water supply and drainage valve when it is water supply and drainage. 3 is a sectional view of a conventional water supply and drainage valve. 1... Valve body, 2... Cooling water passage inside the engine body or radiator body, 3... Water supply and drainage passage,
4...Seal part, 5...Screw part, 6...Hexagonal head,
7... Mounting part, 8... Packing, 10... Valve body mounting hole, 11... Water channel, 12... Valve seat.

Claims (1)

[Scope of utility model registration request] The valve body is a tubular body with a water supply and drainage passage passing through it in the longitudinal direction, and has a threaded part on the outer periphery of the center and a tapered seal part formed at the tip. A valve body mounting hole and a flow channel that intersects with the valve body mounting hole and communicates with the top water portion of the main body are formed at the lower end of the main body, and a concave valve seat is formed on the inner wall of the flow channel as an extension of the valve body mounting hole. A structure of a water supply and drainage valve for an internal combustion engine, characterized in that the valve body is screwed into a valve body mounting hole, and a sealing portion is brought into and out of contact with a valve seat to open and close a water supply and drainage passage of the valve body. .