JPH0921565A - Solar heat collecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar heat collecting device, having connection structure, to perform replacement of each heat collector through a simple work even at a site where brazing equipment is unavailable, and eliminate a fear of dislocation and water leak occurring. SOLUTION: A spigot 21a of an output pipe 21 is inserted and fitted in a socket 25b of a branch pipe 25. An engagement gap therebetween is sealed with an annular packing 26, and fastening and holding by a pair of fastening bands 27 and 27 is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat collecting apparatus, and more particularly to a solar heat collecting apparatus in which a plurality of water collecting tanks are branched and connected to a common outlet side header pipe or hot water storage tank via a branch pipe. The present invention relates to improvement of a heat collecting device.

[0002]

2. Description of the Related Art FIG. 3 exemplifies a conventional solar heat collecting apparatus, in which a transparent glass container 1 having a vacuum inside is provided with a selective absorption film formed on the outer peripheral surface of a water storage member made of metal or the like. The container 2 is installed via the support 3 to form the heat collector 4, and the outlet pipe 5 is connected to one end of the water storage container 2 of each collector 4, and the outlet pipe 5 has a common outlet side header. The outlet side header pipe 6 is connected to the pipe 6 via a branch pipe 7, and the inlet side header pipe 8 is installed substantially concentrically through a support tool 9. An inlet pipe 10 is branched and connected through the outlet pipe 5 toward the water storage container 2 of the heater 4.

The above solar heat collector shows a case where it is composed of four heat collectors 4, and water is introduced from the inlet-side header pipe 8 into each water storage container 2 through each introduction pipe 10. The water is heated by solar heat and distributed and supplied from the outlet pipe 5 through the outlet-side header pipe 6 to hot-water taps such as kitchens and baths.

In each of the heat collectors 4, the sun's light strikes the outer peripheral surface of the water storage container 2 through the transparent glass container 1, and the selective absorption film formed on the outer peripheral surface selectively absorbs the heat of the sun. It warms water. The heat of the water storage container 2 is prevented from escaping to the outside by the vacuum heat insulating space between the glass container 1 and the water storage container 2. The glass container 1 is sealed to a part of the outlet pipe 5 with a sealing fitting 11.

[0005]

Conventionally, the lead-out pipe 5 has been inserted and connected to the branch pipe 7 of the outlet-side header pipe 6, and a brazing material has been poured into this connecting portion for brazing in an airtight manner.

The lead-out pipe 5, the outlet-side header pipe 6 and the branch pipe 7 are generally made of stainless steel, and a passive film is formed on the surface of the pipe. The passive film is removed to prevent oxidation. Therefore, flux is applied and brazing is performed. After brazing, the flux is washed and removed to prevent the progress of corrosion due to the flux.

Such brazing is carried out in advance in a factory or the like, and then the solar heat collector is brought to the installation site and installed on the roof of the house, etc. When the heat collector of the above becomes defective, it is impossible to remove it alone in the place without brazing equipment and immediately replace it, and either remove the entire solar heat collector and take it back to the factory for repair, or It was necessary to replace the entire solar heat collector with a new one.

An object of the present invention is to provide a solar heat collecting apparatus having a connection structure which enables replacement and exchange of each heat collector by a simple work even in a site without brazing equipment, and has a connection structure without fear of removal or leakage of water. To provide.

[0009]

In order to achieve the above object, the present invention comprises a plurality of heat collectors each having a water storage container installed in a glass container whose interior is kept in a vacuum. In the solar heat collector in which the water storage container of (1) is branched and connected to a common outlet side header pipe or hot water storage tank via a lead-out pipe and a branch pipe, one end is connected to the water storage container and the other end is connected to the outlet and the outlet. A lead-out pipe with a retaining groove formed near the mouth and one end connected to the outlet-side header pipe or the hot water storage tank, and the other end has a receiving opening that encloses the packing mounting groove, and is pulled out near the receiving opening. A branch pipe formed with a locking step portion for stopping, an annular packing to be mounted in a packing mounting groove of the branch pipe, the branch pipe and the branch pipe, and the retaining pipe. Locking groove and locking protrusion for engaging the locking step And a pair of tightening bands that have a locking step portion, are divided into two in a plane along the tube axis direction, and are tightened by tightening means, and the outlet of the outlet pipe is used as a receiving port of the branch pipe. It is inserted and fitted, and the fitting gap is sealed by the annular packing and tightly held by the pair of tightening bands.

[0010]

The outlet pipe of each heat collector is divided into two parts by a flat surface along the pipe axial direction with respect to the common outlet-side header pipe or the branch pipe of the hot water storage tank, and the fastening means such as bolts, screws, and rivets is used. Since they are connected by a tightening band having a structure that tightens, when one of the heat collectors of the solar heat collector becomes defective, tightening that connects the outlet pipe and the branch pipe of the heat collector. By loosening the fastening means such as bolts, screws, rivets, etc. of the band, the tightening band can be removed and the outlet pipe can be pulled out from the header pipe on the outlet side or the branch pipe on the side of the hot water storage tank. Is unnecessary. afterwards,
If the outlet pipe of the new collector is inserted into the outlet header pipe or the branch pipe on the hot water storage tank side and fitted with a pair of tightening bands and tightened by the fastening means, the heat collector replacement work is completed. Since it can be used again, each collector can be replaced on site without brazing equipment, and the replacement work can be done with a tool such as a spanner. is there. The lead-out pipe and the branch pipe are formed with a retaining groove and a retaining step portion for retaining, and the retaining protrusion and the retaining step portion which are engaged with the retaining groove and the retaining step portion are tightening bands. Since it is formed in the above, it is possible to reliably prevent the lead-out pipe and the branch pipe from coming off during use. Also, as the annular packing to be mounted in the fitting gap between the outlet of the outlet pipe and the receiving of the branch pipe, if a packing provided with a lip that elastically deforms due to water pressure in the water leak direction to increase the seal pressure is used, Water leakage from the connecting portion between the outlet pipe and the branch pipe in use can be more reliably prevented, which is preferable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an enlarged cross-sectional plan view of a connecting portion between a collector of a solar heat collector and a common outlet-side header tube showing an essential part of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In the figure, 20 is a heat collector and 21 is a lead-out pipe connected to a water storage container (not shown). Reference numeral 22 is a transparent glass container of the heat collector 20, and 23 is a sealing metal fitting, which is integrally and airtightly and annularly sealed and joined by brazing or welding to a part of the outer peripheral surface of the outlet pipe 21. It Reference numeral 24 denotes an outlet-side header pipe common to each heat collector 20, and FIG. 1 shows only one heat-collector 20 for convenience sake, and the outlet-side header pipe 24 also shows only a part thereof. Actually, a plurality of heat collectors 20 required depending on the hot water supply capacity are branched and connected to the outlet-side header pipe 24 at predetermined intervals.

The outlet-side header pipe 24 includes a branch pipe 2
5 are integrally and airtightly joined to each other by brazing or welding at a predetermined pitch by a required number, and a receiving port 25b that encloses the packing mounting groove 25a is bulged at the end of the branch pipe 25. A locking step portion 25c for retaining is formed near the receiving opening 25b. The packing mounting groove 25a is formed by integrally joining a stopper ring 25d having a U-shaped cross section to the inner surface of the receiving port 25b by brazing or welding, and the packing mounting groove 25a is made of an annular packing of synthetic rubber or the like. 26 is attached.

The packing 26 has lips 26a, 26a formed in a bifurcated shape on one surface in the tube axis direction.
The water pressure acts between the bifurcated lips 26a, 26a to elastically deform and increase the seal pressure to prevent water leakage.

At the end of the lead-out pipe 21, there is formed an insertion opening 21a having a tapered end with a reduced diameter and a retaining groove 21b for reducing the diameter in the vicinity of the insertion opening 21a.
The outlet 21a is inserted and fitted into the receiving opening 25b of the branch pipe 25. 1 and 2, 2
Reference numerals 7 and 27 are a pair of tightening bands,
And the branch pipe 25, and the receptacle 25
b is provided with annular bulging portions 27a, 27a that surround the b,
On both sides of the bulged portions 27a, 27a, the locking projections 27 which engage with the locking grooves 21b for locking and the locking step 25c.
c, 27c and locking step portions 27b, 27b are formed and divided into two along a plane along the pipe axis direction, and joint flanges 27d, 27d are formed in series along the divided surface. The flanges 27d, 27d The plurality of locations (FIG. 1 shows the case of four locations) are tightened with bolts 28.

Locking step portion 27 of the tightening bands 27, 27
b, 27b and the locking step portion 2 of the receiving port 25b of the branch pipe 25
As shown in the upper half of FIG. 1, a gap g is formed in the tube axis direction between the water tank 5c and the cylinder 5c, and the water pressure when the water is put into the water storage container of the heat collector 20 is suddenly increased. It is possible to make a relative displacement in the pipe axial direction between the branch pipe 25 on the outlet side header pipe 24 side and the outlet pipe 21 (see the lower half of FIG. 1) against such an increase change, etc. I try to absorb the shock. The tightening bands 27, 27 and the bolt 2
Reference numeral 8 is made of a material such as a stainless material having a rust prevention function or a material subjected to rust prevention treatment.

The solar heat collecting apparatus of the present invention has the above-mentioned structure, and when the heat collector 20 is replaced independently, the bolt 2 is used.
8 is loosened, the tightening bands 27, 27 are removed, and the outlet pipe 21 is withdrawn from the branch pipe 25 together with the heat collector 20. Then, the outlet 21a of the outlet pipe 21 on the side of the new heat collector 20 is inserted and fitted into the receiving port 25b of the branch pipe 25, and the fitting gap is sealed with an annular packing 26, and a pair of tightening bands are provided. Mount 27 and 27 as shown in the upper half of FIG.
Both tightening bands 27, 27 are used while being tightly held by bolts 28.

In the present invention, as in the conventional example shown in FIG. 3, an inlet side header pipe 24 is provided with an inlet side header pipe, and an inlet pipe is branched from this inlet side header pipe to collect heat. It is possible to introduce tap water into the container 20 side and supply the hot water heated by the heat collector 20 from the outlet pipe 21 to the required location via the outlet side header pipe 24. In this case, the outlet-side header pipe 24 is installed at a position higher than the heat collector 20.

As an embodiment in which a hot water storage tank is used instead of the header pipe, the outlet side header pipe 24 and the inlet side header pipe of FIG. 1 are replaced with a hot water storage tank, and the introduction pipe is removed. The hot water collected by each collector 20 is stored in the hot water storage tank by rising due to the difference in specific gravity, and the cold water is made to flow down to the collector 20 to form a natural circulation type solar heat collector utilizing this difference in specific gravity. Can also be applied, and the same effect can be obtained. Needless to say, the present invention can be applied to a solar heat collector of the type in which forced circulation is performed by a pump, and the same operational effect is obtained.

[0019]

According to the present invention, each heat collector collects heat by tightening and loosening the bolts of the pair of tightening bands with respect to the common outlet-side header pipe or the branch pipe of the hot water storage tank. Since the collectors can be replaced and the use can be resumed, the replacement work is very simple, and each collector can be easily replaced on site without brazing equipment. The lead-out pipe and the branch pipe are formed with a retaining groove and a retaining step portion for retaining, and the retaining step portion and the engaging protrusion that engage with the retaining groove and the retaining protrusion are tightening bands. Since it is formed on the
It is possible to reliably prevent the lead-out pipe and the branch pipe from coming off. Further, as the annular packing to be mounted in the fitting gap between the outlet of the outlet pipe and the receiving of the branch pipe, if a packing provided with a lip that elastically deforms by water pressure in the water leak direction to increase the seal pressure is used, Water leakage from the connecting portion between the outlet pipe and the branch pipe in use can be more reliably prevented, which is preferable.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional plan view of a connection portion between a collector of a solar heat collector and a common outlet-side header pipe, showing a main part of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional plan view showing the overall outline of a conventional solar heat collector.

[Explanation of symbols]

 20 Heat Collector 21 Outlet Pipe 21a Outlet 21b Locking Groove 22 Glass Container 23 Sealing Metal Fitting 24 Outlet Side Header Pipe (or Hot Water Storage Tank) 25 Branch Pipe 25a Packing Groove 25b Receiving Port 25c Locking Step 25d Stopper Ring 26 Packing 26a Lip 27 Tightening band 27a Swelling 27b Locking step 27c Locking protrusion 28 Bolt

Claims (1)

[Claims] 1. A plurality of heat collectors, each of which has a water storage container installed in a glass container whose interior is held in a vacuum, wherein the water storage container of each heat collector is connected to a common outlet-side header pipe or hot water tank. In a solar heat collector that is branched and connected via a lead-out pipe and a branch pipe, one end is connected to a water storage container, and the lead-out pipe is formed with an outlet and a retaining groove near the outlet at the other end. And one end is connected to the outlet-side header pipe or the hot water storage tank, and the other end is formed with a bulge forming a receiving port for containing a packing mounting groove,
A branch pipe formed with a retaining step portion for retaining in the vicinity of the receiving port, an annular packing to be mounted in a packing mounting groove of the branch pipe, and mounted across the outlet pipe and the branch pipe, Further, it has a locking projection and a locking step engaging with the locking groove for locking and the locking step, and is divided into two in a plane along the pipe axis direction,
A pair of tightening bands that are tightened by a tightening means, the outlet of the outlet pipe is inserted and fitted into the receiving end of the branch pipe, and the fitting gap is sealed by the annular packing, and A solar heat collector characterized by being held tightly by a pair of tightening bands.