JPH0264360A - Assembling method of electric hot water supply apparatus - Google Patents

Abstract

PURPOSE:To easily complete the setting work at the site in a short period of time after tank knock-down parts are assembled and welded, by attaching a thermal insulating material, an annular supporting frame, an external plate, a heater, control board, etc. on the external surface of each of the tank knock-down parts at a factory previously. CONSTITUTION:A tank is knocked down along a cutting line 10, and thermal insulating materials 5 and 6 are wound around the periphery of each of tank knock-down parts except for portions adjacent the cutting line. The thermal insulating materials 5 and 6 are held at their ends by annular support frames, and covered around their periphery by external plates 7 and 8 to fix them to the annular support frames 15. Two or more guide jigs for assembly work are temporary welded on the ends of the internal surface of the tank knock-down parts, and are removed as the knock-down parts are assembled and the connecting parts are welded. Then, the thermal insulating material is wound around the periphery of welded part, and the external plate is attached around the periphery of the thermal insulating materials 5 and 6 so as to fix to the annular supporting frame 15. The thermal insulating material, annular supporting frame, the external plate are previously attached on the periphery of each of tank knock-down parts at a factory.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electric water heater that has a relatively large tank body and heats water in the tank using an electric heater, and a method for assembling the same.

<Conventional technology> In recent years, electric water heaters that boil water using economical late-night electricity have become widely used, and large water heaters with tank capacities of several thousand liters have also come into use. It has become.

Electric water heaters are usually installed indoors, but when installing a large water heater indoors in an existing building, the tank is too large to fit through the opening in the room when the water heater is fully assembled. <Problem to be solved by the invention> Therefore, it is necessary to assemble the electric water heater indoors, but all steps from welding the tank, installing the control panel, and installing the insulation material and outer panel are required. Since it had to be done on-site, the installation work required skilled technology and a lot of time.

<Means for Solving the Problems> The present invention has been made to solve the above problems, and provides a large electric water heater that can be assembled easily and in a short time at the installation site, and its assembly. The purpose is to provide a solution.

For this purpose, in the electric water heater of the present invention, the tank body is divided on the cutting line, and a heat insulating material is attached to the outer peripheral surface of each tank divided body except for the vicinity of the cutting line, and the outer circumference of the heat insulating material is The outer panels are installed, the insulation material and the ends of the outer panels are supported by an annular retaining frame fixed to the outer periphery of the tank segment, the heater control panel is attached to the outer panel, and each tank segment is assembled. The joint portion is welded, a heat insulating material is attached to the outer circumference near the welding point, and the outer plate is fixed to the annular retaining frame around the outer circumference of the heat insulating material.

In addition, the assembly method involves dividing the tank body along the cutting line, wrapping the insulation material around the outer peripheral surface of each tank division body except for the area near the cutting line, and holding the end of the insulation material with an annular retaining frame. The outer periphery of the insulation material is covered with an outer plate and fixed to the annular retaining frame, and a plurality of guide jigs for assembly and joining are temporarily welded to the inner ends of the divided tank segments, and each tank segment is assembled. While the joint is being welded, the guide jig is removed, and a heat insulating material is wrapped around the outer circumference near the welding point, and the outer plate is fixed to the annular holding frame around the outer circumference of the heat insulating material.

With this configuration, the heat insulating material to be attached to the outer periphery, the annular holding frame, and the outer plate are assembled in advance at a factory, etc. to each tank segment, and each tank segment is assembled at the installation site. After welding, the melt If! By wrapping and fixing the band-shaped heat insulating material and outer panel around the outer periphery near the location, that is, near the cutting line, the installation work on site can be completed in a short time.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a front view including a half section of the electric water heater, and FIG. 2 shows a plan view thereof. The tank body of this water heater is
It is divided vertically into two halves on a horizontal cutting line 10 approximately in the center, and is composed of a tank dividing body 1 and a tank dividing body 2,
A manhole 3 is provided in the upper part of the upper tank divided body 1, and the lower tank divided body 2 is fixed on a base 4.

Insulating materials 5 and 6 such as glass wool are wrapped around the outer periphery of the tank divided bodies 1 and 2, and an outer panel 7.8 such as a stainless steel decorative board is attached to the outer periphery of the insulating material 5.6. Another band-shaped heat insulating material 9 and outer panel 15 are attached to the vicinity of the line.

That is, as shown in FIGS. 3 and 4, the annular holding frame 16 is fixed onto the tank outer periphery via a plurality of thin legs 17 slightly below the cut 1J10 on the outer periphery of the lower tank divided body 2. The upper part of the heat insulating material 6 is held by this annular holding frame 16, and the upper end of the outer plate 8 is fixed to the annular holding frame 162. In this way, the annular holding frame 1 is
6 is fixed, it is possible to transfer the heat of the tank to the outer panel. Further, this annular holding frame 16 is similarly fixed slightly above the cutting line 10 on the outer periphery of the upper tank divided body 1, and the lower part of the heat insulating material 5 is attached to this annular holding frame 16.
The lower end of the outer plate 7 is fixed on the annular holding frame 16. Note that a heat insulating cover consisting of a heat insulating material and an outer plate is also placed over the flat part of the upper part of the tank.

Furthermore, a heater control panel 11 is attached to the outside of the lower tank divided body 2, and a heater control panel 11 is installed inside the tank near the inside of this control panel 11. In addition, a hot water supply port 14 and a water supply port 13 are provided at the upper part and the lower part of the tank body, respectively.

When manufacturing the electric water heater as described above, the annular holding frame 16, the heat insulating materials 5, 6, and the outer panels 7, 8 are attached to the upper and lower tank parts 1, 2, respectively, at the manufacturing factory. The heater 12, control panel 11, etc. are attached to the lower tank divided body 2 and outer plate 8, and a two-divided water heater body is manufactured in advance.

Then, each of these divided parts is carried indoors where it will be installed, and the main body is assembled on site. That is, first, the tank divided body 1 is placed on the tank divided body 2, and the joint parts are circumferentially welded. do.

When placing the tank divided body 1 on the tank divided body 2, as shown in FIG. If we temporarily weld the upper tank segment 1 with the tank protruding from above, and then lower the upper tank segment 1 from above in this state, the tank segment 1 will be positioned directly above the tank segment 2 by the guide jig 20, and the tank will be easily removed. The joining portions of the divided bodies 1 and 2 can be accurately aligned.

Then, in this state, inner circumferential welding is performed from the inside of the tank along the joining line, and at the same time, the guide jig 20 is removed.

Furthermore, after performing external circumferential welding along the joining line from the outer periphery of the tank, as shown in FIG. The outer plate 15 is placed over it and fixed to the annular holding frame I6, completing the assembly of the water heater main body.

In this way, because the tank body is manufactured in parts and then transported to the installation site and assembled, even a large-capacity water heater can be installed in an existing room with a narrow opening. On-site, the water heater itself can be assembled quickly and easily by simply welding the joints of the tank and wrapping a band-shaped insulation material and outer panel around the weld line. and installation can be done.

Although the tank body in the above embodiment was cylindrical, it may also be a square cylinder with a rectangular cross section. Also, if a horizontal tank is used instead of the vertical tank as described above, the vertical cutting line If the tank is large, it can be divided into three or more parts. Further, the guide jig temporarily fixed to the joint of the tank may be attached to either the upper or lower tank divided body, and its shape can be arbitrarily set, such as a band plate.

<Effects of the Invention> As explained above, according to the electric water heater and its assembly method of the present invention, since it is constructed as described above, each tank divided body has a heat insulating material attached to its outer periphery, an annular shape holding frame,
After assembling the outer panel, heater, and control panel in advance at a factory, etc., and assembling and welding each tank segment at the installation site, weld the outer periphery near the welding point, that is, near the cutting line.
It is sufficient to wrap and fix the band-shaped heat insulating material and the outer panel, and the installation work of the large water heater can be easily completed on-site in a short time.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, Fig. 1 is a front view including a half cross section of the water heater, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged sectional view of the tank joint, and Fig. 4 is an annular holding part. A perspective view of the frame. FIG. 5 is a perspective view when the tank divided bodies are joined. 1.2...Tank division body, 5.6.9...Insulating material, 7.8.15...Outer plate, 16...Annular holding frame. Patent applicant

Claims (1)

[Claims] 1. The tank body is divided along the cutting line, and a heat insulating material is wrapped around the outer peripheral surface of each tank segment except for the area near the cutting line, and an outer plate is attached to the outer periphery of the heat insulating material. , the ends of the heat insulating material and the outer plate are supported by an annular holding frame fixed to the outer periphery of the tank divided body, a heater control panel is attached to the outer plate, and each of the tank divided bodies is assembled and joined. An electric water heater characterized in that the parts are welded, a heat insulating material is wrapped around the outer periphery of the welded part, and an outer plate is fixed to the annular holding frame around the outer periphery of the heat insulating material. 2. Divide the tank body along the cutting line, wrap a heat insulating material around the outer peripheral surface of each tank divided body except for the area near the cut line, hold the end of the heat insulating material with an annular holding frame, and wrap the outer circumference of the heat insulating material. The outer panel is covered and fixed to the annular holding frame, and a plurality of guide jigs for assembly and joining are temporarily welded to the inner ends of the divided tank divisions, and each tank division is assembled and the joints are welded. Assembling the electric water heater, wherein the guiding jig is removed while the welding is being carried out, and a heat insulating material is wrapped around the outer periphery of the welding point, and the outer plate is fixed to the annular holding frame around the outer periphery of the heat insulating material. Method.