JPS63223400A - Pump - Google Patents

Abstract

PURPOSE:To perform freeze proofing for a casing, by extending a part of a steel sheet partition part in a plastics casing to the outside of the casing, and installing a heating system in this extended part. CONSTITUTION:Plastics casings 1a and 1b are interposed with a partition plate 5 in the divided part, while this partition plate 5 is constituted of steel of stainless material or the like. A part of the partition plate 5 is extended to each side of these casings 1a and 1b, and a heating system 8 is attached to this extended part. When this heating system is energized, the inside of each of these casings 1a and 1b is heated via a heater 1 and the partition plate 5. Therefore, the casing inside is easily heated with a little heating value, thus freezing is preventable.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a pump that can be easily prevented from freezing.

``Conventional technology'' Pumps can freeze during the winter because water remains inside them.

In particular, when the casing is made of resin, it is easily damaged by freezing, and reliable freezing prevention is required.

Conventional methods for preventing freezing include covering the casing with a cover equipped with a light bulb, or wrapping a long belt-shaped heating device around the casing, such as around a faucet.

This method requires a cover and wraps around the casing, which requires a long belt-like heating device, so dew drops form on the casing in the summer, making it necessary to remove it.

[Problems to be solved by the invention] The present invention has been made in view of these circumstances,
The objective is to obtain a pump that can be easily prevented from freezing.

1. Means for Solving Problem 1" The present invention comprises a casing made of resin, a partition part made of a steel plate, a part of this partition part extending outside the casing, and a heating device installed in this extension part. The problem has been solved by configuring the system to be prepared.

"Function" The partition provided inside the casing allows the heat generated by the heating device to be easily transmitted to the inside of the casing, thereby keeping the inside of the casing warm.

Since the partition plate is provided almost in the center of the casing, the entire casing can be easily kept warm.
Enough heat can be maintained even with low heating power.

Further, the heating device does not need to be removed in the summer, and only needs to be energized when there is a risk of freezing, and the pump does not need to be bulky.

``Example'' The present invention will be described based on an example shown in the drawings. FIG. 1 is a vertical cross-sectional view of an example of the pump of the present invention, and FIG. axial longitudinal section,
FIG. 3 is a front view of the partition plate.

In FIG. 1, the pump is formed with casings 1a and 1b that are divided into two parts at the center, and an electric motor 2 is directly connected to the pump.
are joined at a divided portion, and a partition plate 5 is interposed in this divided portion.

The partition plate 5 is made of a steel plate such as stainless steel, and forms a self-priming chamber and a pump inside the casings 1a and 1b.

In FIG. 2, the pump is provided with a discharge port 6 and a water suction lower in the upper part of the casing 1a11b, and is configured to be connected to a hose (not shown) or the like.

A part of the partition plate 5 extends to the side of the casings 1a, 1b, and a heating device 8 is attached to this extended part.

The heating device 8 generates heat by energizing a nichrome wire or the like, and is connected to a power source (not shown).

In FIG. 3, the partition plate 5 is configured to have the same shape as the casings 1a and 1b so as to be interposed between the divided portions of the casings 1a and 1b, and is configured so that the heating device 8 is attached to the extending portion. ing.

In such a configuration, the pump has casings 1a, 1
When water is injected into the inside of b to drive the electric motor 2, the impeller 4
It exhibits a pumping action.

When there is a risk of freezing, such as in winter, the heating device 8
When energized, the heating bag @8 generates heat and keeps the insides of the casings 1a and 1b warm through the partition plate 5.

The heat retention inside the casings 1a, 1b by this heating device 8 is possible because the partition plate 5 is made of metal such as a steel plate.
Good heat conduction allows the heating device 8 to easily generate heat from the casing 1
a, 1b is transmitted and diffused inside.

Therefore, it is possible to solve the problem that the heat generated by the heating device 8 heats only a local area such as the periphery of the heating device 8, and the amount of heat generated by the heating device must be increased in order to heat the entire casings 1a and 1b.

In particular, when the casings 1a, 1b are made of resin, the resin has poor thermal conductivity, and water heated by the partition plate 5 inside the casings 1a, 1b may
As a result, less heat is radiated through the heating device 8, and the amount of heat generated by the heating device 8 may be extremely small.

Further, since the heating device 8 can be a small heating element, it can be easily waterproofed and the risk of electrical leakage can be eliminated even if the casings 1a, 1b are exposed to dew drops.

The heating device 8 can be attached to the extending portion of the partition plate 5 using screws or the like, and if the heating device 8 itself has a waterproof structure, there is no particular need for waterproofing and it can be easily provided. Can be done.

Furthermore, since the partition plate 5 is made of a steel plate, the heating device 8
For example, it is easy to form a pocket that is convenient for attaching the heating device 8. When forming a pocket, forming a pocket that is open at the bottom prevents dew droplets from entering the heating device 8. Various configurations such as

"Effects of the Invention" According to the present invention, the inside of the casing can be easily kept warm with a small amount of heat generated through the partition plate, and it is only necessary to attach a heating device using a small heating element to the side of the casing. Therefore, it is possible to avoid increasing the size of the pump by requiring a cover, which is convenient as a pump.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the pump of the present invention, FIG. 2 is a longitudinal cross-sectional view of the pump in the axial direction, and FIG. 3 is a front view of a partition plate. 1a, 1b...Casing, 2...Electric motor, 4
... Impeller, 5... Partition plate, 6... Discharge port,
7... Water intake port, 8... Heating device.

Claims (1)

[Claims] In a centrifugal pump having a partition inside the casing,
A pump characterized in that the casing is made of resin, the partition part is made of a steel plate, a part of the partition part extends outside the casing, and a heating device is provided in this extended part.