JPS61190221A - Connecting device of heating hot-water circuit - Google Patents

Abstract

PURPOSE:To facilitate dismantling and restrain an unreasonable power upon connecting by a method wherein the connecting section of a heating hot-water circuit is constituted so as to insert a circulating pump to an expansion tank without using of stop bolts and metal fittings fixing the circulating pump to the predetermined position are provided in the device. CONSTITUTION:A projected connecting section 11 having a penetration hole 11a for inserting in the inside part is formed on a part of the expansion tank 1. On the other hand, the penetration hole 12a for the circulating water absorption is provided inside the projected connecting section 12 which is provided to the case 4 of the circulating pump 3 and a ring shape groove 12b, which an O ring 13 for sealing is fitted on the outer peripheral surface thereof, is formed. Moreover,the connecting section 12 of the circulating pump 3 after fitting of the O ring for the ring shape groove 12b is inserted into the projection section 11 of the expansion tank 1, further, the circulating pump 3 is fixed to a cladding case by the metal fittings 10 so as not to shift from the connecting position. The unreasonable power is not applied for both of the expansion tank and the circulating pump, therefore, the damage thereof and the leakage of the circulating water may be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the configuration of a connection between a circulation pump and an expansion tank in a hot water circuit in a heater.

2. Description of the Related Art Conventionally, the structure of this type of connection section was as shown in FIGS. 4 and 5. An example will be described below with reference to this drawing. That is, expansion 2.

A through hole 5a of a connecting portion 5 provided in an opening 2 provided in the tank 1 and protruding from the tip of the case 4 of the circulation pump 3
Insert the threaded part 6b machined on the inside, and tighten the threaded part 6b on the outer periphery of the through hole 6a machined into the fixing bolt 6 from the inside of the expansion tank 1 through the packing 7 to connect the expansion tank 1 and the circulation pump. were connected as shown in Figure 4.

Problems to be Solved by the Invention However, in the connection method configured as described above, the expansion tank 1 is fixed from the inside with the fixing bolt 6, so the expansion tank 1 is configured deep inside the device body. In this case, the circulation pump 3 could not be removed, and there were also problems such as leakage of circulating water due to insufficient tightening of the fixing bolts 6, and conversely, damage to the case 4 of the circulation pump 3 due to over tightening.

Means for Solving the Problem The connection part of the heating/hot water circuit of the present invention has a configuration in which the circulation pump is inserted into the expansion tank without using bolts, and is equipped with a metal fitting for fixing the circulation pump to the device at that point. There is.

Function The connecting part of the present invention is configured such that the protruding connecting part of a circulation pump with a Q IJ ring attached to the outer circumferential surface is inserted into a protruding part with a through hole provided in an expansion tank and sealed with six rings. With the exception of the fixing metal fittings of the pump, the pump can be easily removed, and it is constructed so that no excessive force is applied when connecting.

Embodiment Hereinafter, the configuration of a connecting portion according to an embodiment of the present invention will be explained with reference to the drawings. Note that the same functional parts as in the conventional example will be described with the same reference numerals.

In the hot water heater shown in FIG. 1, an expansion tank 1 and a circulation pump 3 are located above a heat exchanger 8 and an exhaust pipe 9.
is fixed to an exterior case (not shown) via a fixture 10.

In FIG. 2 and FIG. 3, the expansion tank 1 has a part,
A protruding connection part 11 having a through hole 11a for insertion is formed inside. On the other hand, a through hole 12a for sucking circulating water is provided inside a protruding connecting portion 12 provided in the case 4 of the circulation pump 3, and a six ring 1 for sealing is provided on the outer peripheral surface.
3 is formed with an annular groove 12b for attaching it. And 6
The ring 13 is attached to the annular groove 12b and the expansion tank 1 is
The connecting part 12 of the circulation pump 3 is inserted into the protruding part 11 of the pump. Furthermore, this circulation pump 3 is fixed to the exterior case using a fixing fitting 10 so that the connection position does not shift.

In such a configuration, the circulation pump 3 and the expansion tank 1
The stop bolt 6 used in the conventional example when connecting the
Since the pump 3 is not used, the circulation pump 3 can be easily removed from the expansion tank 1 by removing the screws etc. that fasten the outer case and the fixing fitting 10, and vice versa.

Effects of the Invention As described above, according to the heating/hot water circuit connection of the present invention, the circulation pump can be easily installed and removed from the equipment body.
In addition, since no excessive force is applied to either the expansion tank or the circulation pump, there is no possibility of damage or leakage of circulating water, and the structure is very simple, making it extremely easy to use in practice.

6, -7

[Brief explanation of the drawing]

Fig. 1 is a partial external view of the hot water circuit of a heater, Fig. 2 is a cross-sectional view of the connection part of an embodiment of the present invention, Fig. 3 is an exploded configuration diagram of the same, and Fig. 4 is a cross-section of the connection of the conventional example. 6 are exploded configuration diagrams of the conventional example. 1... Expansion tank, 3... Circulation pump, 11... Protrusion of expansion tank, 12...
...Circulation pump connection, 13...6 rings.

Claims (1)

[Claims] An expansion tank provided with a protrusion having a through hole, and an O ring inserted into the through hole of the expansion tank, and an O ring on the outer peripheral surface of the expansion tank.
A heating hot water circuit connection device comprising a circulation pump having a connection part with a through hole inside, and a fixing fitting that is detachably attached to the circulation pump and stops the pump from moving away from an expansion tank.