JP2551362Y2 - pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump, and more particularly, to a structure of a fan having means for preventing fluid sucked into a casing by rotation of the fan from leaking from a suction port side of the casing. About.

[0002]

2. Description of the Related Art A pump shown in FIG. 4 is known as a pump used for a gardening watering device or the like. This one is
A fan 2 driven by a motor 3 is provided inside a casing 1. In the fan 2, a water guide 4 is vertically provided in a nozzle shape, and the water guide 4 is loosely fitted to a suction port 5 opened in the casing 1. Reference numeral 6 denotes an upper case, and a discharge port 7 is opened. In this device, when the motor 3 is driven and the fan 2 rotates, the fluid is sucked into the casing 1 from the suction port 5 and discharged from the discharge port 7 as indicated by an arrow.

[0003]

However, in the above conventional means, a part of the fluid sucked into the casing 1 is
Due to the high pressure in the casing 1, water leaks from the gap t between the water introduction section 4 and the suction port 5 (see the broken line arrow), and there is a problem that the pump efficiency is not improved.

As a means for solving such a problem, it is conceivable to reduce the gap t as much as possible. However, reducing this gap t is
It is difficult in terms of working accuracy and assembling accuracy, and it is inevitable that a gap t having a certain size is generated. A sliding member is provided between the casing 1 and the fan 2.
Intervening and rotating while sliding the fan 2 against the casing 1
It is also possible to eliminate the gap t
However, the sliding contact resistance between the fan 2 and the casing 1 is sufficiently considered.
Design must be designed, increasing costs and
It becomes a thing. Therefore, an object of the present invention is to provide a pump that can solve the above-mentioned problems of the conventional means.

[0005]

According to the present invention, a casing 1 having a suction port 5 and a water guiding portion 4 disposed inside the casing 1 are provided with a gap t in the suction port 5. The fan 2 is provided with a loosely fitted fan 2 and a drive motor 3 for the fan 2. The rotation of the fan 2 draws fluid from the suction port 5 and discharges the fluid from the discharge port 7. in the pump, the water conduit 4
The doughnut-shaped sheet-shaped sealing member 10 is fitted to the fan 2 , and the sealing member 10 is grounded to the inner surface of the casing 1 by hydraulic pressure in the casing 1, thereby sealing the gap t. Things.

[0006]

In the above construction, when the fan 2 rotates, the fluid is sucked into the casing 1 from the suction port 5 and is discharged to the discharge port 7.
Is discharged from. A part of the fluid sucked into the casing 1 flows backward to the gap t due to the high pressure inside, but the leakage from the gap t is prevented by the seal member 10. In particular, in this case, the liquid pressure of the backflow fluid acts so as to press the seal member 10 against the inner surface of the casing 1. As a result, the water stopping effect can be further improved. At this time sheet
The sealing member 10 is a fan 2 whose only inner end face rotates.
Can be in contact with the outer circumference of the
Even if it becomes impossible to rotate, the rotation of fan 2 is greatly impeded.
Absent.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the pump. Reference numeral 11 denotes a main body case, on which a lid case 14 is mounted. Further, a casing 1 is disposed inside the casing 1, and a fan 2 is disposed inside the casing 1. The main body case 11 includes the fan 2
Is provided. Reference numeral 12 denotes a power cord of the motor 3. A discharge pipe 13 is provided on the back of the main body case 11. Numeral 6 denotes an upper case provided on the upper part of the casing 1. The fan 2 is housed inside the casing 1 and the upper case 6, and the upper case 6 has a discharge port 7 communicating with the discharge pipe 13. Is open.

FIG. 2 is an enlarged view of a main part, and a suction port 5 is vertically provided in a casing 1 in a nozzle shape. The fan 2 is also provided with a nozzle-shaped water guide 4 that is vertically provided, and the water guide 4 is loosely fitted to the discharge port 5 with a gap t. The fan 4 has a hollow part 8, and the fluid sucked from the water guiding part 4 is discharged into the casing 1 through the hollow part 8. The main part shown in FIG. 2 has the same structure as the conventional means shown in FIG.

Reference numeral 10 denotes a sealing member, which is in the form of a donut plate as shown in FIG. 3, is fitted to the water guide 4 and is grounded to the inner surface of the casing 1. The seal member 10 is formed of a synthetic resin or the like in a thin plate shape so as to obtain flexibility. The sealing member 10 is a water guiding portion of the fan 2.
4 between the seal member 10 and the water guide 4
It is separable. In FIG. 1, reference numeral 15 denotes a porous filter interposed between the lid case 14 and the casing 1, and removes dust in the fluid sucked from the opening 16 of the lid case 14.

In the above configuration, when the motor 3 is driven to rotate the fan 2, the fluid is sucked into the casing 1 and discharged from the discharge port 7 toward the discharge pipe 13 (see the arrow in FIG. 2).

A part of the fluid sucked into the casing 1 flows back to the gap t due to the high pressure inside the casing 1 (see the broken line in FIG. 2). Is strongly pressed against the inner surface of the casing 1 to seal the gap t, preventing backflow water from leaking from the gap t. In this case, as the internal pressure of the casing 1 becomes higher, the seal member 10 is pressed more strongly against the inner surface of the casing 1 and the water stopping effect is further enhanced.

[0012]

[Effects of the Invention] As described above, the present invention provides a
A fan 2 disposed inside the casing 1 and having a fan 2 of a water guide 4 loosely fitted to the suction port 5 with a gap t;
The drive motor 3 is provided, and when the fan 2 rotates, fluid is sucked from the suction port 5 and the discharge port 7
In pump as discharged from the sheet-like seal member 10 of the donut-shaped fan 2 of the water conduit 4
The gap t is sealed by contacting the sealing member 10 to the inner surface of the casing 1 by the liquid pressure in the casing 1 so that the fluid sucked into the casing 1 can be reliably prevented from leakage from the gap t, also the size in the rotation of the fan 2
Since there is little effect, a pump with high pump efficiency can be obtained.

[0013]

[Brief description of the drawings]

FIG. 1 is a sectional view of a pump.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a perspective view of a sealing member.

FIG. 4 is a sectional view of a conventional pump.

[0014]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Fan 3 Motor 4 Water guide part 5 Inlet 7 Outlet 10 Seal member t Gap

Claims (1)

(57) [Scope of request for utility model registration] 1. A casing 1 having a suction port 5, a fan 2 disposed inside the casing 1 and having a water guiding portion 4 loosely fitted in the suction port 5 with a gap t.
And a drive motor 3 for the fan 2.
By rotating the pump, the fluid is sucked from the suction port 5 and discharged from the discharge port 7. In the pump 2 , the doughnut-shaped sheet-shaped seal member 10 is attached to the fan 2 of the water guide 4. A pump, wherein the gap t is sealed by fitting the sealing member 10 to the inner surface of the casing 1 by hydraulic pressure in the casing 1.