JP2819050B2 - Pump device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pump device in which a casing provided with an impeller is divided, and a partition plate is interposed in the divided portion.

[Prior Art] A pump device such as a centrifugal pump has a structure in which the inside of a casing forms a complicated water passage, and generally, the casing is cast.

However, even if a casing that becomes a bag is cast, not all of them can be integrally formed.It has been attempted to cast the casing in a divided state and form a water channel in the casing with a partition plate interposed in the divided portion. ing.

[Problems to be Solved by the Invention] In a pump device that forms a water passage of a casing with a partition plate interposed therebetween, since the partition plate is formed of a plate such as a stainless steel plate, the partition unit is made watertight with respect to a divided portion of the casing. And two packings had to be used for one partition plate.

When the packing is provided on both sides of the partition plate in this manner, the effect of damping the water flow hitting the partition plate and reducing noise can be obtained.

However, since the part that shields the outside from the outside is formed on both sides of the two packings, the packing has four contact surfaces with other parts, and water leaks due to foreign matter caught during assembly etc. In addition, there were problems such as generation of rust and noise from the through hole of the partition plate.

The present invention has been made in view of such circumstances, and has prevented water leakage from the packing portion, and has also prevented rusting of the partition plate, improved the performance of the pump, and further prevented noise. It is intended to provide a pump device.

[Means for Solving the Problems] In the pump device of the present invention, a first pump chamber is formed.
A casing, a second casing forming a water intake passage, a water supply passage, and the like; an impeller housed in the first casing; and a partition plate interposed between the first casing and the second casing. In the pump device provided with the above, a plurality of through holes such as water absorption holes and water supply holes are formed in the partition plate, and the punching surface inner periphery of the plurality of through holes, and both surfaces of the partition plate are covered with buffer members. This solves the problem.

[Operation] Since the packing provided on both sides of the partition plate is connected to the buffer member via the inner edge portion of the through hole and integrally formed, the partition plate is not exposed inside the casing, and the packing is performed on the casing. Will form a shielding portion at two places.

[Embodiment] The present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of a main part of a pump device according to an embodiment of the present invention, and FIG. It is a principal part enlarged longitudinal sectional view.

1 and 2, the pump device is provided with an impeller 2 inside a casing 1a divided into two parts, and a divided portion of the casings 1a and 1b so that the impeller 2 produces a pumping action. The partition plate 3 is interposed.

On both surfaces of the partition plate 3, there are provided cushioning members 4 formed of a member such as rubber.

Further, the partition plate 3 is formed with through holes 5a, 5b, 5c which form water passages inside the casings 1a, 1b, and the inner edges of these through holes 5a, 5b, 5c are provided with buffer members 4a, 5b, 5c. The cushioning members 4 provided on both sides of the partition plate 3 are connected and integrated.

The through hole 5a is a water absorption hole, the through hole 5b is a water supply hole,
The through hole 5c is a self-priming hole.

The partition plate 3 is strongly compressed by a bolt or the like (not shown) at a divided portion of the casings 1a and 1b, and is configured to use the buffer member 4 as a packing so as not to leak water.

In such a configuration, the pump device
The partition plate 3 is interposed between the divided portions a and 1b, and the impeller 2 is provided.

Then, at the time of assembly, the buffer members 4 on both surfaces of the partition plate 3 are compressed so as to be water-tight at the portions in contact with the casings 1a and 1b.

For this reason, the buffer member 4 acts as a packing, and can be shielded from leaking between the casings 1a and 1b.

Further, since the punched surfaces of the through holes 5a, 5b, 5c of the partition plate 3 are covered with the buffer member 4, there is no risk of water leaking from between the partition plate 3 and the buffer member 4.

Therefore, there is a portion where there is a risk of water leakage only between the buffer member 4 and the divided portions of the casings 1a and 1b.

[Effects of the Invention] As described above, the present invention covers both sides of the partition plate with the buffer member, and further covers the punched surfaces of the holes provided in the partition plate with the buffer member. Water can be prevented from leaking from the space, and furthermore, the partition plate is not exposed to the water channel, so that the corrosion resistance of the partition plate is improved. And the partition plate and the cushioning member are integrated, so that a high-performance pump device can be obtained such that assembly is easy and assembly failure is eliminated.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of a pump device according to an embodiment of the present invention, and FIG. 2 is an enlarged vertical sectional view of the main part. 1a, 1b ... casing, 2 ... impeller, 3 ... partition plate,
4... Buffer member, 5a, 5b, 5c.

Claims (1)

(57) [Claims] A first casing forming a pump chamber; a second casing forming a water absorption passage, a water supply passage, and the like; an impeller housed in the first casing; In a pump device provided with a partition plate interposed between the second casing and the second casing, a plurality of through holes such as a water absorption hole and a water supply hole are formed in the partition plate. A pump device having improved corrosion resistance by covering the periphery and both surfaces of a partition plate with cushioning members.