BRPI0905220A2 - METHOD FOR MOUNTING SNAPS FROM BATH SOLAR WATER HEATERS WITH PLASTIC HOSE SEGMENTS, SERPENTINE, ADAPTED SOLDER IRON - Google Patents

Abstract

METHOD FOR MOUNTING SNAPS FROM BATHROOM SOLAR WATER HEATERS WITH PLASTIC HOSE SEGMENTS, SERPENTINE, ADAPTED SOLDER IRON. Currently the methodology used for mounting if solar heater coils using plastic hose segments is to fit and fix ready connections to hose segments by means of clamps or wire, T-type connections are relatively expensive, a cheaper solution. It is the use of the technique of juxtaposition and connection of the walls of the hose segments themselves, through the realization of lateral connection point (45), which allow the natural circulation of water through the thermosiphon effect through the solar heater coil. The prefect plastics are polyethylene or polypropylene with UV protection. The field of application is the solar water heater industry, with short coils being purchased, cut and enlarged by users.

Description

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"METHOD FOR SERPENTINE ASSEMBLY OF ^ -

BATH WATER SOLAR HEATERS WITH PLASTIC HOSE SEGMENTS, SNAPS, ADAPTED WELDING IRON "

This patent application relates to a process employed in the manufacture of solar heater coils using plastic hose segments, applicable to the assembly of low cost solar heaters capable of thermosyphon effect.

Solar heater coils made from plastic tubes and hoses have been used due to their lower cost than copper pipe coils, although with lower thermal performance.

Several developments are seen in the literature and in patent processes such as, for example, Jose Alano Patent Processes PI0402869-4, 2004, where PVC hydraulic connections are used to assemble the hydraulic circuit of a pipe solar heater coil. also PVC. According to a manual published on the World Wide Web, the inventor advises that the size of the hydraulic circuit should limit to 55 ° C the maximum temperature that water can reach in order not to compromise the structure of the solar heater.

Another development, such as what appears in the academic work "Solar Solar Heater" of Prof. Mário Kawano, 2004, available at www.sici.unaerp.br/arquivos/Generador%20 Electric% 20 Social.pdf, consulted on April 19, 2009, uses polyethylene hose segments for irrigation and hose fittings, fastened by wire for greater economy. The author describes the use of polyethylene hose segments in the making of coils of so many types of closed solar heaters, in the cover of the tubes for protection against the wind is made with the use of PET bottles and in the other with the use of of a wooden box with glass cover. With the second type the temperature of 71 ° C of the water in the surface of the thermal reservoir was registered.

Due to the current state of the art, for the production of low cost solar heaters, the polyethylene hose segment solar heater with grid-shaped coil makes it possible to heat water to about 70 ° C on the reservoir surface, but the technique employed for mounting the solar heater coil utilizes relatively high cost hose connections, J ^% 2/12 ~ · Fls - Ml-Tg-

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T-type connections being the most costly. The perceived problem is the need to eliminate the use of T-type connections without the use of high initial cost technologies.

The aim of this invention is to provide a more economical manufacturing process for the production of low cost heaters from polyethylene hose segments, which proposes as a solution the connection between the hose segments themselves used. The advantage of this process is that it is cheaper than using T-type ready connections and can be used to make solar heater coils of different shapes, such as grid, spiral, among others.

The object of this patent application is the method of assembling solar heater coils made of plastic hose segments, which is characterized by the technique of juxtaposing and attaching the walls of the hose segments themselves to lateral connection points. that allow the natural circulation of water by thermosyphon effect.

The accompanying figures help to understand the invention, given by way of example without, however, restricting the scope of the invention.

Figure 1 shows a top view of a grid-shaped solar heater coil. Figure 2 shows a bottom view of a heater coil

solar grid.

Figure 3 shows a sectional view of a grid-shaped solar heater coil.

Figure 4 shows in top view a pair of hose segments to be connected.

Figure 5 shows in section the cross section of a pair of juxtaposed hose segments.

Figure 6 shows in top view a hose segment with auxiliary bore and juxtaposed with another hose segment. Figure 7 shows in section a perforated hose segment and

juxtaposed to another hose segment.

Figure 8 shows a side view of a flat head tip. Figure 9 shows a top view of a flat head tip. Figure 10 shows a bottom view of a head tip

flat.

Figure 11 shows a sectional view of a head tip

flat.

Figure 12 shows a side view of a soldering iron fitted with a flat head tip.

Figure 13 shows a side view of a vertical support for

drilling machine.

Figure 14 shows a front view of a vertical stand for

drilling machine.

Figure 15 shows a side view of a vertical drill stand with an adapted soldering iron.

Figure 16 shows a front view of a vertical drill stand with an adapted soldering iron.

Figure 17 shows in top view of a hose segment, with a non-stick tape inserted into the auxiliary bore, juxtaposed to another hose segment.

Figure 18 shows in section two hose segments juxtaposed with a narrow non-stick tape inserted into the auxiliary bore.

Figure 19 shows a side view of juxtaposed hose segments, with the flat head tip inserted through the auxiliary bore.

Figure 20 shows in section the contact between the flat head tip, the narrow non-stick tape and the inner wall of one of the hose segments for welding.

Figure 21 shows a side view of the juxtaposed hose segments with the flat head tip inserted through the auxiliary bore after perforation of the hose segment walls.

Figure 22 shows in section the juxtaposed hose segments and the flat head tip introduced through the auxiliary bore after perforation of the hose segment walls. 4/12 '0. · Figure 23 shows in top view a pair of hose segments juxtaposed and connected after making a watertight hole.

Figure 24 shows in cross-section a pair of connected hose segments after making a watertight hole. Figure 25 shows a side view of a concave tip.

Figure 26 shows a front view of a concave tip. Figure 27 shows a top view of a concave tip. Figure 28 shows a bottom view of a concave tip. Figure 29 shows a side view of a concave tip adapted to the body of a soldering iron connected in series with a dimmer.

Figure 30 shows a top view of a plastic plug over

the auxiliary hole.

Figure 31 shows in side view the welding application to plug the auxiliary hole.

Figure 32 shows a top view of a pair of segment segments.

hose already connected, covered with plastic reinforcement, tied with a piece of wire.

Figure 33 shows a side view of a pair of already connected hose segments, covered with plastic reinforcement, tied with a piece of wire.

Figure 34 showing a schematic of welding equipment

by ultrasound.

Figure 35 shows in top view a pair of connected hose segments.

Figure 36 shows a cross-sectional view of a pair of segments of

hose juxtaposed and connected.

Figure 37 shows a sectional view of a pair of juxtaposed hose segments connected by mechanical element and sealing ring.

Figure 38 shows a view of a flat spiral shaped solar heater coil.

Figure 39 shows a view of a flat spiral shaped solar heater coil. 5/12 ~ · I ^ JS- 8 · CtV

A solar heater coil (1) is seen in Figure 1 in a top view and Figure 2 in a bottom view. It consists of the tubular arrangement of hose segments, preferably made of grid-shaped UV5-protected polyethylene. See five parallel vertical hose segments of the same shape and size, hose segments 11, 12, 13, 14 and 15, with sealed ends 140, 141, (142), (143), (144), (145), (146), (147), (148) and (149). Said vertical hose segments are laterally connected to the hose segments (21) and (31) disposed horizontally via the lateral connection points (600), (601), (602), (603) , (604), (605), (606), (607), (608), and (609). The hose segment (31) has the closed end (32) on one side and the open end for the water inlet (33) on the other. The hose segment (21) has on one side a closed end (22) and on the other the water outlet (23).

Figure 3 is a cross-sectional view of the solar heater coil (1), the hose segment (14) is connected at the top to the hose segment (21) at the connection point (603) by means of the hole (161) and is also connected underneath to the hose segment (31) at the connection point (608) by means of the watertight hole (162). Watertight holes 162 and 161 act as water inlets and outlets for tube 14 when the coil is conveniently connected to a thermal reservoir and exposed to heating by the sun. The warmer fluid moves to the positions Therefore, a bushing 160, preferably made of polyethylene film surrounding a material such as polyethylene foam, is secured between the sealing hole 161 and the end 144, its function is to prevent stagnation. large amount of warmer fluid at the top of the vertical segments of the solar heater coil (1).

The reason the hose segments of the solar heater coil (1) are preferably made of polyethylene is because, according to manufacturers, it can be used at temperatures up to 80 ° C. One way of making heater coils (1) It begins by cutting the hose segments and placing these segments in position to assemble the coil. When assembling the coil it should be noted that the hose segments (21) and (31) must be below the vertical segments. _ 6/12 ^ Riih- £

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For performing lateral connection points between hose segments, the use of a heated element may also be preferred, a technique also known as a hot plate or hot plate. To make the process easier to understand, two small hose segments that are laterally connected can be used as an example. This is shown in Figure 4 showing the hose segment (41) juxtaposed with the hose segment (42) before drilling the hose segment (41). Figure 5 shows in section AA the cross section of the hose segment (41) juxtaposed to the hose segment (42) before creating a connection point. As shown in Figure 6, an auxiliary hole (61) is drilled in the segment

(41), which is juxtaposed to the hose segment (42), with said upwardly facing hole centered. Figure 7 shows in section the auxiliary bore (61), the hose segment (41) and the hose segment (42). The purpose of the auxiliary bore (61) is to provide access to the interior of the hose segment (42) so that an element capable of fusion of the walls of the two hose segments in the region where they are in contact can be introduced. The diameter of the auxiliary bore (61) must be large enough to allow the introduction of a welding element from the inner wall of the hose segment (41).

An element that can be used to promote the process of

Welding is a properly shaped tip that fits in place of the common tip of a soldering iron. Figure 8 shows a side view of a nozzle (71) with a smooth cylindrical body (72) and a flat head (73). Tip 71 is also shown in top view in Figure 9, bottom view in Figure 10, and in sectional view in Figure 11. Said tip can be made of any high melting metal such as steel and has the solid body as can be understood from the figures cited.

Figure 12 shows a side view showing a ferrule (71) set as a ferrule on the body of a soldering iron (81) forming the adapted soldering iron (171).

As the "soldering iron releases heat, for safe use of the adapted soldering iron (171) it must be fixed to a bracket, as shown in Figure 13;; H \ 7/12 5 Fl, 1 '%

which shows in side view a vertical drill stand (401) commonly found in commerce. The same can be seen in Figure 14, which shows in front view said vertical drill holder. The main parts are the base (402), the main bar (403), the collar (404) and the drive lever (405). The collar 404 is the proper location for attaching a drill, which in this case is used to attach the adapted soldering iron 171, which with a vertical movement of the lever 405 can move vertically and parallel to the main bar (403). As shown in Figures 16, wherein the adapted soldering iron (171) appears fixed to the collar (404).

For welding without the adhesion of molten plastic to the flat head (73) of the nozzle (71), a narrow non-stick tape (75), preferably made of fiberglass fabric impregnated with a non-stick type polymer resin polytetrafluoroethylene (PTFE), or one of its derivatives, which must be introduced into the hose (41) through the auxiliary bore (61) as shown in Figure 17 Figure 18 shows in cross section DD the narrow non-stick tape (75) on the inside the hose segment (41).

Figure 19 shows a side view showing that the nozzle (71) is inserted into the hose segment (41) through the auxiliary bore (61). Figure 20 shows by section EE that the nozzle (71) is brought into contact with the narrow non-stick tape (75) and the inner wall of the hose segment (41). For welding, eg between 1A hoses

polyethylene for irrigation, the power of the adapted electric soldering iron (171) with the tip (71) can be 50 W, connected to the mains in series with a dimmer (85). The time required for preheating may vary according to site temperature and hose segment characteristics. With ambient air at 30 ° C the adapted soldering iron can be heated for 15 minutes before use, with the dimmer in the maximum position. The dimmer (85) has the function of allowing the heating control provided by the body of the soldering iron (81) and can be used to keep the temperature within the desired range, because there are variations in the mains or even overheating. After heating, the contact between the tip (71), the

Narrow non-stick (75) to the inner wall of the hose segment (41), Figure 20. Contact is maintained by applying gentle pressure to the adapted soldering iron (171). With / go \ 8/12 υ »Λ $

The heating portion of the hose segment wall (41) fuses to the hose segment wall (42), which leads to the joining of the contact region between the two said hose segments. Up to this point welding of these hose segments is made, but a watertight hole is required for the communication of the internal volumes of the hose segments (41) and (42) to be made, which can be obtained by maintaining the pressure on. the assembly thus punctures the walls of the hoses with the removal of a plastic portion 62 shown in side view, Figure 21. Figure 22 shows in section FF the pair of said hose segments after welding and perforation of its walls, in this figure a portion of plastic (62) is adhered to the narrow non-stick tape (75) which is pushed into the hose segment (42). Up to this point in the process the connection between the two internal volumes of the two said hose segments has been made.

In polyethylene hoses, for irrigation with walls 2 mm thick, the welding described here takes about 30 seconds, and may vary according to the characteristics of the environment and hose segments, such as temperature and wall thickness. After perforation of the walls, the nozzle (71) is removed and then the narrow non-stick tape (75) is removed, showing the formation of the watertight hole (63), as seen in Figure 23, which shows a top view of the aforementioned pair of hose segments, now with the lateral connection point (45), which needs to be completed.

By removing the narrow non-stick tape (75), the plastic portion (62) taken from the walls of said hose segments may be loosened within the hose segment (42) or adhered to the narrow non-stick tape (75), This occurs as the tape is used. It is important to have access to the interior of the hose segment (42) during coil assembly so that the plastic portion (62) can be removed if it is deposited therein. The reason is that pieces of plastic may compromise the circulation of fluid within said coil.

Figure 24 shows a cross-sectional view GG of the pair of hose segments (41) and (42) showing the auxiliary bore (61) and the waterproof bore (63) and the lateral connection point (45). The next step is to close the auxiliary bore (61), which is by sealing a plastic plug (66), which can preferably be made with a piece of the same hose from which the hose segments are obtained. For closure a wide non-stick tape (65) of the same material as the narrow non-stick tape (75) and a concave ferrule (76) are used.

The concave tip 76 is shown in Figure 25 in side view, Figure 26 in front view, Figure 27 in top view and Figure 28 in bottom view. The concave tip (76) has the smooth cylindrical body (77) having at one end the concave head (78), which is a small downward concave plate with a single radius of curvature attached to the cylindrical body (77). The adapted soldering iron (182) has the concave head tip (76) adapted to the body of a soldering iron (82), serially connected with a dimmer (86) as seen in Figure 29.

As shown in Figure 30, over the auxiliary bore (61) is the plastic plug (66). Heat is then applied by means of preheated, adapted soldering iron (182) to the plastic plug (66) covered with a wide non-stick tape (65) until welding has been performed, as shown in side view on Figure 31.

The connection obtained is watertight but does not have sufficient mechanical strength to withstand handling and transport tensile stresses. Thus a cover is provided by securing a plastic reinforcement (83) made with a piece of hose tied with the wire (84), as can be seen in Figure 32 showing a top view of a pair of hose segments (41) and (42), already connected, covered with plastic reinforcement (83) and tied with a piece of wire (84). Figure 33 shows a side view of a pair of hose segments (41) and (42), already connected via the lateral connection point (45), covered by a plastic reinforcement (83) and tied with the wire. (84).

Finally, there is the absence of pieces of plastic inside the hose segments, removing them if they exist and closing the ends of the vertical segments, leaving the horizontal segments with the openings for water inlet and outlet. , which can be done by welding, hot plate or ultrasound.

In this embodiment of the coil assembly, the welding can be done one by one or with the simultaneous application to all lateral connection points in a coil shaft or even in its entire tubular structure, which can be done. by means of a set of heated elements. The / 41% previous example shows a preferred way to assemble side-connected coils to replace the use of T-type fittings. It uses low-cost, easy-to-obtain materials in large urban centers without relying on sophisticated technology. . The use of a heated element without non-stick tape should be avoided as it has disadvantage with respect to the healthiness of the process even if a non-stick resin coated tip is used, yet molten plastic attaches to the body (72) with the flat head (73).

Another way to assemble the process of assembling a side-connected coil is by welding inside the hose segment (41), replacing the hot plate technique known as the hot plate technique. ultrasound. The equipment to perform ultrasound welding is shown in the diagram in Figure 34, which shows an ultrasound generator (501) and an ultrasonic gun (502), and at the tip of the ultrasonic gun (502) is the sonotrode. (503).

What changes in relation to the first form presented as

Preferred is the technique of welding the inner walls with the replacement of the heated element by inserting the sonotrode (503) into the auxiliary bore (61) in the hose segment (41) shown in Figure 7. A sonotrode is a made-up metal element. preferably in material such as titanium or duralumin alloys made to operate by vibrating at a suitable frequency in the ultrasound range which leads to melting of the plastic. The ultrasound heat sealing process generates noise, but is much faster and does not require the use of non-stick tape, and it is said to emit less pollutants with plastic melting.

There is still another way of mounting a side-connected coil by means of a mechanical element. Among the mechanical elements that can be used is preferably eyelets, which resembles a thin-walled hollow rivet. A mechanical element side connection between two other hose segments 641 and 642 joined at the mechanical element side connection point 645 are shown in the top view in Figure 35 and appear in section in Figures 36 and 37. Figure 36 shows a PP sectional view of the two hose segments 641 and 642 clamped to the lateral connection point 645, with the peripheral portion of the eyelet 630 appearing within the hose segment 642). Figure 37 aA Ha Λ r>

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shows a cross-sectional view QQ of which the eyelet 630 is seen, which is a hollow mechanical element and when fixed expands the opposite end to the flap 651 and locks the eyelet ring 631. The sealing ring (632) that appears between the walls of the hose segments (641) and (642) is compressed and made of resilient material such as silicone rubber, so that it can keep up with the movements that occur due to expansion and thermal contraction and prevent side connection leaks

it should be clear that it can be made up of number of vertical segments and with the desired dimensions, being the number five given by way of example. Can be used in series or in parallel according to the decision of Solar Energy Engineering projects subject to temperature limitations. The immediate application for the solar heater coil (1) is to be used in enclosed and glass enclosed solar heaters featuring mechanical devices to prevent overheating, such as small cracks or thermostatic valves, as polyethylene should not be used further 80 ° C. The second use by the solar heater industry is that a short vertical segment coil can be purchased as a kit for mounting a larger coil, it is sufficient for a solar heater installer or users to do so themselves. adaptations by cutting and splicing using plastic hose segments and joints, the results of which can be applied as large open heaters, such as those used for pool heating or even making closed heaters. The protection of the vertical segments from wind action can be done by means of glass-enclosed housing or by using PET soda bottles as is currently the case with PVC tubular pipe structures and hydraulic connections.

It has been commented earlier that polyethylene hoses are preferable because they are cheap and can be bought with UV protection from manufacturers, polypropylene hoses can also be used but are more expensive, PVC hoses, like soft PVC, are more expensive. and according to manufacturers, can be used at low pressure up to 60 ° C, which does not prohibit its use. But it is noted that the way to perform the welding of the lateral connections in segments of

(645).

With respect to solar heater coil (1) in grid format .2 / 12 / tf ^ SEse = I / ■

Plastic hoses of the PVC family is by means of high frequency welding also called radio frequency.

As stated at the beginning of this report, the technique of assembling heater coils made of hose segments can be applied to various tubular arrangements, in addition to the grid shape, another example of flat spiral. Figure 38 shows a top view of a flat spiral shaped solar heater coil (201). The hose segment 214 is arranged in a flat spiral shape, its ends 241 and 242 are closed. The hose segment 221 is juxtaposed over the hose segment 214 and is attached to it at the side connection points 202, 203, 204, 205, 206 and 206. 207). At one end of the hose segment (221) is the water inlet (232) and the water outlet (222). In Figure 39, a cross-sectional view of the spiral-shaped solar heater coil 201 can be seen that the internal volumes of the hose segments 214 and 221 connect via the watertight holes 262, (263), (264), (265), (266) and (267). When connected to a thermal reservoir, which does not appear in the drawings and properly exposed to solar radiation, occurs the natural circulation of water, which enters into the segment (221) through the water inlet (232), rises inside it as well. as for the hose segment (214) by the watertight holes (262), (263) and (264). As water is heated, it is pushed up into the hose segment (214) and back into the hose segment (221) through the watertight holes (265), (266) and (267) where it joins water that is also heated within this hose segment to exit from the water outlet (222) toward a thermal reservoir. The advantage of the flat spiral-shaped solar heater coil shape is that there are fewer closed ends, only two, plus each lateral connection point serves two lateral lines as it acts as a crosshead which is a more expensive hose connection than the T-type connection. The coil mounting technique with the use of lateral connection object of this patent application can be applied to other shapes such as conical and cylindrical spirals, parallel arcing spirals and others.

Claims (7)

1. METHOD FOR MOUNTING SNAPS FROM BATHROOM SOLAR WATER HEATERS WITH PLASTIC HOSE, SNAIL, WELDING IRON, which is characterized by the use of the technique of juxtaposing and connecting the walls of the plastic hose segments, such as polyethylene or polypropylene with UV protection by means of lateral connection points (45), where a lateral connection point (45) is obtained as follows: - the hose segment (41) is perforated the auxiliary bore (61), - the hose segment (41) is fitted over the hose segment (42), crosswise with the auxiliary bore (61) facing upwards, - a non-stick tape is inserted (75) until it comes into contact with the inner wall of the perforated hose segment (41), - a heated ferrule (171) of the adapted soldering iron (171) is introduced through the auxiliary bore (61). ) until you enter the contact between the tip (71), fit the narrow non-stick (75) and the inner wall of the hose segment (41), contact is maintained by applying light pressure during thermal energy transfer to fuse the two walls of the welded juxtaposed hose segments, the pressure is maintained after welding to promote perforation of the hose segment walls with the sealing hole 63 when a plastic portion 62 is released from the hose segment walls, the tip (71), the narrow non-stick tape (75) is removed, the plastic portion (62) that comes off the hose segments with the perforation is removed, the auxiliary hole (61) is closed by welding a piece of plastic (66), using a curved head tip (76) attached to an adapted soldering iron (182) and a wide non-stick tape (65), the point is protected connection side (45) by tying a plastic reinforcement (83) with a wire me (84) on the side of the segment (41). 2. METHOD FOR ASSEMBLYING ° 1 SNAKE SNAPS SOLAR WATER HEATERS WITH PLASTIC HOSE SEGMENTS, SERPENTINE, SOLDER IRON according to claim 1, characterized by using sonotrode (503) applied to the inner wall of the hose segment (41) for ultrasound welding at the lateral connection point (45). 3. METHOD FOR ASSEMBLING SNAPS FROM BATHROOM SOLAR WATER HEATERS WITH PLASTIC HOSE SEGMENTS, SERPENTINE, SOLDER IRON according to claim 1, characterized in that the mechanical element is used within the plastic hose segments. 4. METHOD FOR ASSEMBLING SNAPS FROM BATHROOM SOLAR WATER HEATERS WITH PLASTIC HOSE SEGMENTS, SERPENTINE, WELDING IRON according to claim 1, characterized in that it uses PVC plastic hose segments and high frequency welding. 5. BATH SOLAR WATER HEATER COIL WITH PLASTIC HOSE SEGMENTS characterized by having hose segments mounted with lateral connection points (600) to (609) between the vertical segments (11) to (15) and the horizontal segments (21) and (31) with closed ends (22) and (32) and water outlet (23) and water inlet (33) respectively, said vertical segments closed at the closed ends (140) to (149), with pouch (160) secured between the watertight hole (161) and said upper ends. 6. BATH SOLAR WATER HEATER COIL WITH PLASTIC HOSE SEGMENTS characterized by having the hose segment (221) interconnected with the hose segment (214), the hose segment (214) being arranged in a flat spiral shape , with its ends (241) and (242) closed having the hose segment (221) the water inlet (232) and the water outlet (222). 7. ADAPTED WELDING IRON characterized by having the soldering iron (171) adapted to the flat head tip (71), set as a tip on the body of a soldering iron (81).