JP3664185B2 - Solar heat collector - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a solar heat collector, and more particularly to an improvement of a solar heat collector formed by branching and connecting a water storage container of a plurality of heat collectors to a common outlet side header pipe or hot water storage tank via a branch pipe. It is.
[0002]
[Prior art]
FIG. 3 exemplifies a conventional solar heat collecting apparatus, and supports a water storage container 2 made of metal or the like having a selective absorption film coated on the outer peripheral surface inside a transparent glass container 1 whose inside is kept in a vacuum. 3 is installed to constitute a heat collector 4, and a discharge pipe 5 is connected to one end of the water storage container 2 of each heat collector 4, and this discharge pipe 5 is connected to a common outlet-side header pipe 6. 7, an inlet-side header pipe 8 is installed in the outlet-side header pipe 6 in a substantially concentric manner via a support 9, and the inlet-side header pipe 8 has water storage for each heat collector 4. An introduction pipe 10 is branched and connected through the outlet pipe 5 toward the container 2.
[0003]
The solar heat collecting apparatus shows a case where it is constituted by four heat collectors 4. Water is introduced into each water storage container 2 from the inlet side header pipe 8 through the introduction pipes 10, and the introduced water is converted into solar heat. The hot water is then heated from the outlet pipe 5 through the outlet-side header pipe 6 and distributed hot water is supplied to hot water taps such as kitchens and baths.
[0004]
In each heat collector 4, solar 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 solar heat and warms the internal water. Is. And the heat | fever of the water storage container 2 is prevented from escaping outside by the vacuum heat insulation space between the glass container 1 and the water storage container 2. The glass container 1 is sealed to a part of the outlet tube 5 with a sealing fitting 11.
[0005]
[Problems to be solved by the invention]
Conventionally, the lead-out pipe 5 is inserted and connected to the branch pipe 7 of the outlet-side header pipe 6, and brazing material is poured into this connecting portion to be airtightly brazed.
[0006]
The outlet 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. In order to remove the film and prevent oxidation, a flux Is applied and brazing is performed. Then, after brazing, the flux is washed and removed to prevent the progress of corrosion due to the flux.
[0007]
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. In the event that the equipment fails, it is impossible to remove it on site without brazing equipment and replace it immediately, and remove the entire solar thermal collector and take it back to the factory for repair or solar thermal collector. The entire device had to be replaced with a new one.
[0008]
An object of the present invention is to provide a solar heat collecting apparatus having a connection structure that enables replacement and replacement for each heat collector by a simple operation even on the site without brazing equipment, and does not cause removal or leakage of water. It is in.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a plurality of heat collectors in which water storage containers are installed in a glass container whose interior is maintained in a vacuum, and the water storage containers of the respective heat collectors are connected to a common outlet side header. In a solar heat collecting apparatus that is branched and connected to a 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 retaining stopper near the outlet. A lead-out pipe formed with a groove, one end connected to an outlet-side header pipe or a hot water storage tank, and the other end formed a bulging receiving port containing a packing mounting groove, and a locking step portion for retaining is formed near the receiving port A branching pipe, an annular packing that is mounted in the packing mounting groove of the branching pipe, and a fixing groove and a locking step that are mounted across the outlet pipe and the branching pipe, Has a locking projection and a locking step to engage the tube, and is in the tube axis direction And a pair of fastening bands that are tightened by fastening means. The outlet of the outlet pipe is inserted and fitted into the outlet of the branch pipe, and the fitting gap is formed into the annular gap. Sealed by packing and tightly held by the pair of tightening bands.
[0010]
[Action]
The outlet pipe of each heat collector is divided into two planes along the pipe axis direction with respect to the common outlet header pipe or branch pipe of the hot water storage tank, and is tightened by fastening means such as bolts, screws, rivets, etc. If one of the solar collectors of the solar heat collector becomes defective, the bolt of the fastening band connecting the outlet pipe and the branch pipe of the collector By loosening the fastening means such as screws and rivets, the fastening band can be removed and the outlet pipe can be removed from the outlet side header pipe or the hot water tank side branch pipe, eliminating the need for brazing material removal processing or excision. is there. After that, the new heat collector lead-out pipe is inserted and fitted into the outlet header pipe or the hot water storage tank side branch pipe, and a pair of tightening bands are attached and tightened by fastening means to replace the heat collector. It can be used and can be used again, so even if there is no brazing equipment, it is possible to replace each collector in the field, and the replacement work can be done only with a tool such as a spanner. Simple. The lead-out pipe and the branch pipe are formed with a locking groove and a locking step for retaining, and a locking projection and a locking step that are engaged with the locking groove and the locking step are a fastening band. Therefore, it is possible to reliably prevent the outlet pipe and the branch pipe from coming out during use. Further, as an annular packing attached to the fitting gap between the outlet of the outlet pipe and the outlet of the branch pipe, a packing provided with a lip that is elastically deformed by the water pressure in the direction of water leakage to increase the seal pressure is used. It is preferable because water leakage from the connecting portion between the outlet pipe and the branch pipe in use can be more reliably prevented.
[0011]
【Example】
FIG. 1 is an enlarged cross-sectional plan view of a connecting portion between a collector of a solar heat collecting apparatus and a common outlet-side header pipe showing a main part of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG. , 20 is a heat collector, and 21 is a lead-out pipe connected to a water storage container (not shown). 22 is a transparent glass container of the heat collector 20, and 23 is a sealing fitting that is integrally and airtightly and annularly sealed and joined to a part of the outer peripheral surface of the outlet pipe 21 by brazing or welding. The 24 is an outlet side header pipe common to each heat collector 20, FIG. 1 shows only one heat collector 20 for convenience, and the outlet side header pipe 24 also represents only a part. Actually, a plurality of heat collectors 20 required according to the hot water supply capacity are branched and connected to the outlet side header pipe 24 at a predetermined interval.
[0012]
A plurality of branch pipes 25 are integrally and airtightly joined to the outlet side header pipe 24 by brazing or welding at a predetermined pitch, and a packing is attached to the end of the branch pipe 25. A receiving port 25b that encloses the groove 25a is formed to bulge, and a locking step portion 25c for retaining is formed in the vicinity of the receiving port 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 has an annular packing made of synthetic rubber or the like. 26 is attached.
[0013]
The packing 26 has lipes 26a, 26a formed on one surface in the tube axis direction. The water pressure acts between the two lipes 26a, 26a, thereby elastically deforming the seal pressure. It increases and prevents water leakage.
[0014]
At the end of the lead-out tube 21, an insertion opening 21a having a tapered diameter is formed at the end, and a locking groove 21b for retaining is formed in the vicinity of the insertion opening 21a with a reduced diameter. Is inserted and fitted into the receiving port 25b of the branch pipe 25. 1 and 2, reference numerals 27 and 27 denote a pair of tightening bands, which are mounted across the lead-out pipe 21 and the branch pipe 25, and have an annular bulging portion 27a covering and surrounding the receiving port 25b. 27a, and locking protrusions 27c and 27c and locking step portions 27b and 27b that engage with the locking grooves 21b and the locking step portions 25c are formed on both sides of the bulging portions 27a and 27a. The flanges 27d and 27d for joining are formed in series along the divided surface, and a plurality of locations of the flanges 27d and 27d (FIG. 1 shows the case of 4 locations). Is structured to be fastened with a bolt 28.
[0015]
As shown in the upper half of FIG. 1, there is a gap in the tube axis direction between the locking step portions 27b and 27b of the tightening bands 27 and 27 and the locking step portion 25c of the receiving port 25b of the branch pipe 25. g is formed, and the branch pipe 25 and the outlet pipe 21 on the outlet side header pipe 24 side against a sudden increase in water pressure when water is put into the water storage container of the heat collector 20. Relative displacement in the direction of the tube axis (see the lower half of FIG. 1), thereby absorbing the impact. The tightening bands 27 and 27 and the bolt 28 are made of a material having a function of preventing rust such as stainless steel or a material subjected to rust prevention treatment.
[0016]
The solar heat collector of the present invention has the above-described configuration. When the heat collector 20 is replaced alone, the bolts 28 are loosened, the fastening bands 27 and 27 are removed, and the outlet tube 21 is connected to the heat collector 20. At the same time, it is extracted from the branch pipe 25. Then, the insertion port 21a of the outlet pipe 21 on the new heat collector 20 side is inserted and fitted into the receiving port 25b of the branch pipe 25, the fitting gap is sealed with the annular packing 26, and a pair of tightening bands is provided. 27 and 27 are mounted as shown in the upper half of FIG. 1, and both tightening bands 27 and 27 are tightened and held with bolts 28 for use.
[0017]
In the present invention, similarly to the conventional example shown in FIG. 3, an inlet-side header pipe is disposed in the outlet-side header pipe 24, and an inlet pipe is branched from the inlet-side header pipe to each collector 20 side. It is possible to introduce tap water and supply 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 higher position than the heat collector 20.
[0018]
Further, as an embodiment in the case where a hot water storage tank is used instead of the header pipe, the outlet side header pipe 24 and the inlet side header pipe in FIG. The hot water collected by the heater 20 is raised and stored in the hot water storage tank due to the specific gravity difference, and the cold water flows down to the heat collector 20 and is also applied to a natural circulation type solar heat collector utilizing the specific gravity difference. And has the same effect. Needless to say, the present invention can be applied to a solar heat collecting apparatus of the type forcibly circulated by a pump, and has the same effect.
[0019]
【The invention's effect】
According to the present invention, each collector can exchange each collector by tightening and loosening bolts of a pair of fastening bands with respect to a common outlet header pipe or branch pipe of a hot water storage tank. Since the use can be resumed, the replacement work is very simple, and even if there is no brazing equipment, it is possible to easily replace each heat collector in the field. The lead-out pipe and the branch pipe are formed with a locking groove and a locking step for retaining, and a locking step and a locking projection that are engaged with the locking groove and the locking protrusion are the fastening bands. Therefore, the outlet pipe and the branch pipe can be reliably prevented from being used during use. Further, as an annular packing attached to the fitting gap between the outlet of the outlet pipe and the outlet of the branch pipe, a packing provided with a lip that is elastically deformed by the water pressure in the direction of water leakage to increase the seal pressure is used. It is preferable because water leakage from the connecting portion between the outlet pipe and the branch pipe in use can be more reliably prevented.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional plan view of a connecting portion between a collector of a solar heat collecting apparatus and a common outlet side header pipe showing the main part of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional plan view schematically showing the whole of a conventional solar heat collecting apparatus.
[Explanation of symbols]
20 heat collector 21 outlet pipe 21a outlet 21b locking groove 22 glass container 23 sealing fitting 24 outlet side header pipe (or hot water storage tank)
25 Branch pipe 25a Packing groove 25b Receiving port 25c Locking step portion 25d Stopper ring 26 Packing 26a Lip 27 Tightening band 27a Bumping portion 27b Locking step portion 27c Locking projection portion 28 Bolt

Claims (1)

It is equipped with a plurality of heat collectors in which water storage containers are installed in a glass container whose interior is kept in a vacuum, and the water storage containers of each heat collector are connected to a common outlet-side header pipe or hot water storage tank, outlet pipe and branch pipe In a solar heat collecting device that is branched and connected via
One end is connected to the water storage container, and the other end is formed with an outlet and a retaining groove for retaining in the vicinity of the outlet, and
One end is connected to the outlet-side header pipe or hot water storage tank, and the other end is formed with a receiving port that encloses the packing mounting groove, and a branch pipe formed with a locking step portion for retaining in the vicinity of the receiving port;
An annular packing mounted in the packing mounting groove of the branch pipe;
It has a locking projection and a locking step that are mounted across the lead-out pipe and the branch pipe, and that engages with the locking groove and the locking step for the retaining. A pair of fastening bands which are divided into two along the plane along which they are fastened by fastening means;
The solar heat characterized in that the outlet of the outlet pipe is inserted and fitted into the outlet of the branch pipe, the fitting gap is sealed with the annular packing, and tightened and held with the pair of fastening bands. Heat collector.

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