JP2500009Y2 - Cooling water control valve for water cooling engine pump - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water control valve for a water-cooled engine pump having a pump and a water-cooled engine for driving the pump and cooling it with cooling water supplied from the pump.

[0002]

2. Description of the Related Art Conventionally, in such a water-cooled engine pump, a pump and a water-cooled engine are connected by a cooling water passage, and a water passage valve for connecting and disconnecting the cooling water flow in the cooling water passage. And a ventilation valve located downstream of the water passage valve. The water passage valve automatically opens the cooling water passage to supply water to the water-cooled engine when water is supplied to the pump, and automatically closes the cooling water passage when water is stopped. It prevents the inflow of air from the cooling water flow path into the pump, prevents the water from falling inside the pump, and restarts the water flow to the pump without having to perform a priming operation when the pump is restarted. is there. On the other hand, the ventilation valve is opened and closed by manual operation.By opening it when the water is stopped, air is introduced from the cooling water inlet of the water-cooled engine through the cooling water flow path, and the cooling water is smoothly discharged from the inside of the water-cooled engine. It was designed to be performed by.

Further, as disclosed in Japanese Utility Model Laid-Open No. 1-173337, there is a valve in which the functions of a water passage valve and a ventilation valve are provided.

[0004]

[Problems to be Solved by the Invention] When the water valve and the ventilation valve are provided separately, it is necessary to secure a space for providing each valve, and it is necessary to secure such a space. As a result, the entire water-cooled engine pump becomes larger,
It has the drawback of being heavy. In addition, the cost is increased due to the increase in the number of parts. Further, there is a drawback that the number of places where water leakage can occur increases.

On the other hand, in the valve device disclosed in Japanese Utility Model Laid-Open No. 1-173337, a cooling water intake port connected to a pump and a vent port open to the atmosphere are opened and closed by a single valve element. When the water is flowing to the pump, the valve body is pushed up by water pressure to open the cooling water outlet and close the ventilation hole, and supply the cooling water from the pump to the water-cooled engine pump through the cooling water flow path and the ventilation hole. It is designed to prevent water leaks. Also,
When the water is stopped, the valve body is dropped by its own weight to open the ventilation port and close the cooling water outlet to prevent water from falling inside the pump due to the inflow of air into the pump and to prevent air in the cooling water passage. The cooling water is drained smoothly from inside the water-cooled engine.

Here, in order to ensure that the cooling water outlet is closed by the valve body when the water is stopped, the weight of the valve body is increased and the surface contacting the valve seat provided around the cooling water outlet. It is necessary to increase the pressure. If the surface pressure is low due to the light weight of the valve element, air enters from the cooling water intake port and the water in the pump falls, and a priming operation must be performed when the pump is restarted. On the other hand, in order to surely close the vent hole by the valve body when passing water, it is necessary to reduce the weight of the valve body and promptly perform the closing operation of the vent hole. If it takes time to complete the closing operation of the vent due to the weight of the valve body, a part of the cooling water flows out from the vent.

As described above, the valve body needs to be heavy in order to open and close the cooling water outlet, and lightweight to open and close the ventilation port.
Therefore, in order to meet such contradictory requirements, the valve body must be made of a material having a small specific gravity, and the size must be increased to increase the weight. There are drawbacks.

[0008]

According to a first aspect of the present invention, there is provided a water-cooled engine pump having a pump and a water-cooled engine for driving the pump and cooling the water with cooling water supplied from the pump. The other end of the cooling water outlet connected to the pump is connected to the other end of the water passage having one end connected to the cooling water inlet of the water-cooled engine and the other end of the ventilation port having one end open to the atmosphere. A valve body for water passage that is provided with a closed valve box and is pushed up by water pressure when water is passed to the pump to open the cooling water outlet, and when water is stopped, falls by its own weight to close the cooling water outlet. And, when passing water, the ventilation port is pushed up by water pressure to close the ventilation port, and at the time of stopping water, the ventilation valve body that falls by its own weight to open the ventilation port is stacked and stored in the valve box, The above The specific gravity of the use valve body the water passage valve element
Smaller than the specific gravity of .

According to a second aspect of the invention, in the first aspect of the invention, the vent valve body is formed of a soft elastic material.

[0010]

According to the first aspect of the present invention, when the water is passed through the pump, the water passage valve body is pushed up by water pressure to open the cooling water outlet, and the ventilation valve body is pushed up by water pressure for ventilation. The mouth is closed, and the cooling water that has entered the valve box from the cooling water outlet is supplied to the cooling water inlet side of the water-cooled engine through the water passage opening. Since the ventilation valve body is made of a material with a low specific gravity, the ventilation valve body pushed up by water pressure moves quickly and the ventilation port is closed quickly, so cooling from the ventilation port Water outflow is prevented.
On the other hand, at the time of water stoppage, the valve for water flow falls due to its own weight to close the cooling water outlet, and the valve for ventilation drops due to its own weight to open the vent and flow into the valve box from the vent. The air flows into the cooling water inlet side of the water cooling engine through the water passage, and the cooling water is smoothly discharged from the water cooling engine. Since the valve body for water passage is made of a material with a large specific gravity, the surface pressure in contact with the valve seat around the cooling water outlet becomes large when the cooling water outlet is closed, and the water passage valve Make sure that the body closes the cooling water outlet,
Air is prevented from flowing into the pump from the cooling water outlet, and water is prevented from falling from the pump.

According to the second aspect of the present invention, since the vent valve body is formed of the soft elastic material, the valve seat made of the soft elastic material surrounds the vent hole when closing the vent hole with the vent valve body. Even if a separate valve is not provided, the ventilation valve can reliably close the ventilation port.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A pump 1 and a water-cooled engine (not shown) that drives the pump 1 and water-cools with cooling water supplied from the pump 1 are provided. The water-cooled engine pump is provided by the pump 1 and the water-cooled engine. Is configured.

A valve box 3 is fixed to the outer peripheral portion of the casing of the pump 1 with bolts 2.
One end is the other end of the cooling water intake port 4 connected to the pump 1, and one end is the other end of the water passage port 6 connected to the cooling water intake port (not shown) of the water cooling engine via a hose 5. ,
The other end of the vent hole 7 whose one end is open to the atmosphere is connected. Further, in the valve box 3, the cooling water outlet 4
A valve seat 8 for water passage located around the is provided. The ventilation port 7 is disposed above the cooling water outlet 4, and the water passage 6 is disposed between the ventilation port 7 and the cooling water outlet 4.

Next, in the valve box 3, a spherical valve body 9 for water passage which is a valve body for water passage for opening and closing the cooling water outlet 4.
And a venting spherical valve body 10 that is a venting valve body that is mounted on the water passing spherical valve body 9 so as to be freely contactable and separable and that opens and closes the vent hole 7. Here, the water-passing spherical valve body 9 is made of a material having a large specific gravity,
On the other hand, the ventilating spherical valve body 10 is made of a soft elastic material having a small specific gravity.

In such a structure, when the water is stopped, the water passage spherical valve body 9 has a water passage valve seat 8 as shown by a solid line in FIG.
The cooling water outlet 4 is closed by abutting against the cooling water outlet 4, and the aeration spherical valve body 10 is placed on the water passage spherical valve body 9 as shown by the solid line in FIG. The ventilation port 7 is opened apart from the valve seat portion 11 formed around the periphery 7. In this state, the vent hole 7 and the water passage port 6 are in communication with each other.

Next, the water-cooled engine is started to drive the pump 1, and the water-cooled engine drives a priming pump (not shown) to perform the priming operation. When the priming pump is driven, the pressure in the pump 1 becomes a negative pressure state lower than the atmospheric pressure, and the negative pressure causes the pump 1 to absorb water. At the time of this priming operation, the negative valve inside the pump 1 sucks the water-passing spherical valve element 9 and presses it against the water-passing valve seat 8, so that the air from the cooling water outlet 4 into the pump 1 is sucked. Is blocked.

When water is absorbed into the pump 1, a pressure is applied to the water by an impeller (not shown) to generate a water pressure in the pump 1, and the water source pumps the water.
Water is continuously supplied to the inside, and water is discharged from a water discharge port (not shown) of the pump 1.

When water is supplied to the pump 1, the pump 1
The water pressure inside also acts on the spherical valve body 9 for water flow, and the spherical valve body 9 for water flow is pushed up. When the spherical valve for water passage 9 is pushed up, the water in the pump 1 flows into the valve box 3 from the cooling water outlet 4, and the pressure of the water flowing into the valve box 3 causes the spherical valve for aeration. The body 10 is pushed up, and this spherical valve body for ventilation 1
0 contacts the valve seat portion 11 as shown by the chain double-dashed line in FIG. 1 to close the vent hole 7. Here, since the ventilating spherical valve body 10 is made of a material having a small specific gravity, it is quickly moved to a position where it abuts on the valve seat portion 11, and the water flowing into the valve box 3 is ventilated through the vent hole 7. It is prevented from flowing out from. Further, since the ventilation spherical valve body 11 is formed of a soft elastic material, a reliable closed state can be obtained without providing the valve seat portion 11 with a member made of a soft elastic material as a valve seat. On the other hand, the water that has flowed into the valve box 3 is supplied from the water passage port 6 through the hose 5 to the cooling water inlet side of the water-cooled engine as cooling water. It should be noted that the spherical valve body 9 for water passage pushed up by water pressure also moves to the highest position shown by the chain double-dashed line in FIG. 1, and remains in the highest position during water passage. Further, at the inlet of the water passage 6, the water passage 1 having a width narrower than the diameter of the spherical valve 9 for water passage.
2 is formed to prevent the water passage port 6 from being closed by the water passage spherical valve body 9.

Next, when the water-cooled engine is stopped and the drive of the pump 1 is stopped, the water pressure in the pump 1 disappears, so the spherical valve 9 for water passage falls due to its own weight and is shown by the solid line in FIG. Then, the cooling water outlet 4 is closed by contacting the water inlet valve seat 8. On the other hand, the aeration spherical valve body 10 also falls due to its own weight, and as shown by the solid line in FIG.
Placed on top of the vent opening 7
And the water passage 6 are connected. Then, the air vent 7 and the water vent 6 are communicated with each other, so that air is allowed to flow from the vent 7 to the valve box 3
While flowing into the inside, the water further flows through the hose 5 into the cooling water inlet side of the water-cooled engine and the cooling water is smoothly discharged from the water-cooled engine. Further, since the spherical valve body 9 for water passage is made of a material having a large specific gravity, and since the weight thereof is heavy, the surface pressure in contact with the water passage valve seat 8 is large, so that the cooling water outlet 4 can be reliably closed. Therefore, it is possible to prevent the air flowing into the valve box 3 from flowing into the pump 1 from the cooling water outlet 4, preventing the water from falling from the pump 1 and restarting the water-cooled engine. It is possible to restart the water discharge immediately without performing the priming operation.

[0020]

The present invention is provided with a valve box in which the cooling water outlet, the water passage, and the vent are connected as described above, and when the water is passed through the pump, it is pushed up by the water pressure and the cooling water outlet is opened. A valve body for water passage that opens and drops the cooling water outlet by its own weight when the water is stopped, and a ventilation port that is pushed up by water pressure when water is passed and closes the ventilation port and falls by its own weight when the water is stopped The vent valve for opening the valve is housed in the valve box, and the vent valve is made of a material with a low specific gravity, so the vent valve closes the vent at the start of water flow quickly. Therefore, it is possible to prevent the water flowing into the valve box from the cooling water outlet from flowing out from the ventilation port, and the water passage valve body is made of a material having a large specific gravity. Keeps the water flow valve cool when the water is stopped. By increasing the surface pressure of the water outlet that contacts the valve seat, the cooling water outlet can be reliably closed by the water passage valve, preventing air from flowing into the pump from the cooling water outlet. In addition, it is possible to reliably prevent water from falling from inside the pump.Furthermore, because the water valve body is made of a material with a large specific gravity, it is sufficient even if the outer diameter of the water valve body is made small. Therefore, it is possible to secure a sufficient weight, and therefore it is possible to reduce the size of the entire valve device. Further, as in the invention according to claim 2, the ventilation valve body is formed of a soft elastic material, so that the ventilation can be improved. Even if a valve seat made of a soft elastic material is not separately provided around the mouth, the ventilation valve body can surely close the vent hole, so that the valve seat can be formed integrally with the valve box. The process of assembling the It has an effect or the like can be reduced and a reduction in the number of assembling steps of the parts.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 1 Pump 3 Valve Box 4 Cooling Water Outlet 6 Water Passage 7 Vent 9 Water Passage Valve 10 Ventilation Valve

Claims (2)

(57) [Scope of utility model registration request] 1. A water-cooled engine pump having a pump and a water-cooled engine for driving the pump and cooling the water with cooling water supplied from the pump,
One end of the cooling water outlet connected to the pump, and the other end,
A valve box is provided, one end of which is connected to the cooling water inlet of the water-cooled engine and the other end of which is connected to the other end of the vent opening to the atmosphere. A valve body for water passage that is pushed up by the valve to open the cooling water outlet and falls by its own weight when water is stopped to close the cooling water outlet, and is pushed up by water pressure during water passage to raise the ventilation port. during waterproofing with closing and falls by its own weight overlapped each other and a vent valve element to open said vent
Housed in the valve box Te, the through specific gravity of the vent valve element
A cooling water control valve for a water-cooled engine pump, which has a specific gravity smaller than that of the water valve body . 2. The cooling water control valve for a water-cooled engine pump according to claim 1, wherein the ventilation valve body is formed of a soft elastic material.