CN102778058A

CN102778058A - Solar heat collecting tube with metal U-shaped inner tube

Info

Publication number: CN102778058A
Application number: CN2012102509977A
Authority: CN
Inventors: 王宝根
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2012-11-14

Abstract

A solar heat collecting tube with a metal U-shaped inner tube comprises a glass outer tube and an inner tube inserted into the glass outer tube and is characterized in that the inner tube is the metal U-shaped inner tube, and two tube openings are located at the same end, inserted into a united water collecting tank and fixed through nuts. A part of the inner surface of the glass outer tube exposed to the sun is provided with a semi-circular arc shaped reflecting film, and the glass inner tube is located at the focusing position of the reflecting film to reflect sunlight irradiated on the reflecting film into the metal U-shaped inner tube. An inner wall of the metal U-shaped inner tube is provided with an enamel layer capable of effectively preventing infrared radiation in the metal inner tube from leaking. An outer wall of the metal U-shaped inner tube is provided with an enamel solar absorbing film capable of effectively absorbing solar energy irradiated on the metal U-shaped inner tube. The shortcomings of existing heat collecting devices are overcome, and the solar heat collecting tube with the metal U-shaped inner tube has the advantages of being not easy to burst and being reliable in use, wide in heat-absorbing area, high in heat utilization rate and the like.

Description

The solar energy heat collection pipe of pipe in the metal U-shaped

One, technical field

The present invention relates to a kind of solar energy heat collection pipe, especially a kind of be used for heat collector in the solar energy heat collection pipe of pipe in the metal U-shaped is arranged.

Two, background technology

At present, solar energy heat collection pipe generally is the sealing of an end opening one end, i.e. blind pipe.The density contrast that the natural recirculating type hot-water heating system of being made up of them often relies on the different generations of water temperature in heat collector and the water storage box carries out temperature difference circulation (thermosyphon circulation), and its water circulating speed is not high, and heat utilization efficiency is not high.

The inner and outer pipes and the junction of the vacuum solar heat-collecting pipe that generally uses at present are glass; Inner and outer pipes is evacuated between the inner and outer pipes for being rigidly connected, and whole pipe is as a glass liner of a thermos flask that ten minutes is elongated; This thermal-collecting tube is because the inner and outer pipes temperature difference and processing technology are easy to generate booster; Need make with the very little heat resistant glass of thermal coefficient of expansion, technology is complicated, and cost is high.

Though be coated with coating to improve the absorptivity to solar radiation at interior tube-surface, pipe is interior not to have reflection, beam condensing unit, and because there is infrared emanation in the interior high-temp liquid of pipe, it is bigger to the extraradial thermal losses of thermal-collecting tube, makes the solar thermal utilization rate not high.

Three, summary of the invention

The objective of the invention is to solve the deficiency of above-mentioned existing heat collector, the solar energy heat collection pipe of pipe in a kind of metal U-shaped that is used for heat collector be provided, make its have use reliable, be difficult for characteristics such as explosion, endotherm area are wide, heat utilization efficiency height.

The objective of the invention is to adopt following scheme to realize: the solar energy heat collection pipe of pipe in a kind of metal U-shaped; It comprises that glass outer tube and the interior pipe that inserts in the glass outer tube constitute; Be characterized in: pipe is the interior pipe of metal U-shaped in said, and its two mouths of pipe are fixed through nut in end and insertion couplet header tank; Inner surface has the reflectance coating of semicircular arc towards the part of the sun in the said glass outer tube, and glass inner tube is positioned at focusing place of reflectance coating, will shine in solar energy reflection on the reflectance coating manages in the metal U-shaped; On the said metal U-shaped inner tube wall enamel layer is arranged, can prevent effectively that the infra-red radiation in the metal inner pipe from leaking outside; On the metal U-shaped outer wall of inner tube enamel solar absorbing film is arranged, can effectively shine the solar energy on the pipe in the metal U-shaped fast to absorption.

The inwall of pipe also is provided with the muscle that a circle is evenly arranged around circumference in the above-mentioned metal U-shaped, its can the reinforcement metal U-shaped in the intensity of pipe, the contact area of the water in the tube and tube in the metal U-shaped is increased, improve the efficiency of heating surface.

The setting of pipe enameling in the above-mentioned metal U-shaped can also make when in glass outer tube and metal U-shaped, managing fixedly, only needs its contact site of high-frequency heating, just can enamel be fused into its contact site, makes it airtight seamless; Said enamel can also be glass dust, and glass dust has microwave absorbing material, can absorb microwave, only needs high-frequency heating or its contact site of heating using microwave, just can glass dust be fused into its contact site, makes it airtight seamless.

Water inlet pipe and outlet pipe are arranged in the above-mentioned header tank, and two mouths of pipe of pipe are respectively as import and outlet in the metal U-shaped, and import is communicated with the water inlet pipe that joins header tank; Outlet is communicated with the outlet pipe that joins header tank; So that water or air are got into by import, flow out from outlet, realize the circulation heating.

The present invention adopts the beneficial effect of such scheme to be: the 1) metal inner pipe of the effective band muscle of this solar energy heating; Can effectively prevent the breakage of metal inner pipe, make it not fragile, long service life; The contact area of the interior water of metal inner pipe and pipe is increased, improve the efficiency of heating surface; 2) setting of pipe internal reflection film, and interior pipe is eccentric to be provided with, and makes solar focusing in interior pipe, improves collecting efficiency, and pipe is equivalent to pipe in two in the U-shaped, has increased heating surface area, and has added the hot water amount; 3) infrared emanation in the metal inner pipe can be reflected back by enamel and reflectance coating, reduces heat loss, and heat utilization efficiency is high; 4) pipe can carry out water or air circulation after inserting water tank in the U-shaped, improves the efficiency of heating surface, makes it can be used for running water circulation heating or air circulation heating.

Four, description of drawings

Fig. 1 is the three-dimensional structure diagram of the solar energy heat collection pipe of pipe in a kind of metal U-shaped of the present invention;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is an another kind of structure of the present invention.

Label declaration in each width of cloth accompanying drawing is following:

The 1-water tank; The 1a-upper cover plate; The 1b-cover plate; The 1c-delivery port; The 1d-water inlet; 2-glass outer tube; Pipe in the 3-metal U-shaped; 3a-nut one; The 3b-import; 3c-nut two; The 3d-outlet; The 3e-muscle; 4-enamel solar absorbing film; The 5-enamel layer; The 6-reflectance coating.

Five, the specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the solar energy heat collection pipe of managing in a kind of metal U-shaped of the present invention is described in detail.

As shown in Figure 1, the solar energy heat collection pipe of pipe in a kind of metal U-shaped, it comprises glass outer tube 2 and inserts pipe 3 in the metal U-shaped in the glass outer tube 2.

Join in the header tank 1 water inlet pipe and outlet pipe are arranged; The mouth of pipe is respectively water inlet 1d and delivery port 1c, and as import 3b and outlet 3d, import 3b is communicated with the water inlet pipe that joins header tank 1 two mouths of pipe of pipe 3 respectively in the metal U-shaped; Outlet 3d is communicated with the outlet pipe that joins header tank 1; Water or air are got into by import 3b, and 3d flows out from outlet, realizes the circulation heating.

As shown in Figure 1, joining header tank 1 has upper cover plate 1a and cover plate 1b to be separated out the water inlet pipe and the outlet pipe of setting up and down, and the import 3b of pipe 3 stretches out glass outer tube 2 different length with outlet 3d in the metal U-shaped, makes import 3a insertion water inlet pipe, outlet 3b insert outlet pipe.The import 3b of pipe 3 is equipped with external screw thread with outlet 3d place in the metal U-shaped; Screw and join header tank 1 base plate through nut two 3c and external screw thread and fix in figure middle outlet 3d insertion couplet header tank 1 back; Cover plate 1b covers fixing after outlet 3b is fixing again; Screw and join header tank 1 cover plate 1b through nut one 3a and external screw thread and fix in import 3b insertion couplet header tank 1 back, upper cover plate 1a covers fixing after import 3b is fixing again.

As shown in Figure 3 is another kind of structure of the present invention; The water inlet pipe and the outlet pipe that are provided with about having below the upper cover plate 1a of couplet header tank 1; The import 3b of the interior pipe 3 of metal U-shaped this moment stretches out glass outer tube 2 the same length with outlet 3d and gets final product; The import 3b of pipe 3 is equipped with external screw thread with outlet 3d place in the metal U-shaped; Import 3b and outlet 3d insert to join header tank 1 back and screw and join header tank 1 base plate with external screw thread with nut two 3c through nut one 3a and fix, upper cover plate 1a in the metal U-shaped, manage 3 cover again after fixing fixing.

As shown in Figure 2; Glass outer tube 2 inner surfaces have the reflectance coating 6 of semicircular arc towards the part of the sun; Pipe 3 off-centre are provided with in glass outer tube 2 and the metal U-shaped, and the interior pipe 3 of metal U-shaped is positioned at focusing place of reflectance coating 6, and the solar energy reflection that can will shine on the reflectance coating 6 focuses in the interior pipe 3 of metal U-shaped.

As shown in Figure 1, on pipe 3 inwalls enamel layer 5 is arranged in the metal U-shaped, can prevent effectively that the infra-red radiation in the metal inner pipe 3 from leaking outside, on pipe 3 outer walls enamel solar absorbing film 4 is arranged in the metal U-shaped, can effectively shine the solar energy on the pipe 3 in the metal U-shaped fast to absorption.Simultaneously, pipe 3 is fixedly the time in glass outer tube 2 and metal U-shaped, and only its contact site of need high-frequency heating just can fuse into its contact site with enamel material, makes it airtight seamless; Enamel 5 in the said metal U-shaped on pipe 3 outer walls can also be glass dust, and glass dust has microwave absorbing material, can absorb microwave, only needs high-frequency heating or its contact site of heating using microwave, just can glass dust be fused into its contact site, makes it airtight seamless.

As shown in Figure 2, pipe 3 inwalls also are provided with the muscle 3e that a circle is evenly arranged around circumference in the metal U-shaped, muscle 3e can the reinforcement metal U-shaped in the intensity of pipe 3, the contact area of the water in the pipe 3 and pipe in the metal U-shaped is increased, improve the efficiency of heating surface.

Claims

1. the solar energy heat collection pipe of pipe in the metal U-shaped; It comprises glass outer tube (2) and inserts the interior pipe formation in the glass outer tube (2); It is characterized in that: pipe is the interior pipe of metal U-shaped (3) in said, and its two mouths of pipe are fixed through nut in end and insertion couplet header tank (1); The interior inner surface of said glass outer tube (2) has the reflectance coating (6) of semicircular arc towards the part of the sun, and glass inner tube is positioned at focusing place of reflectance coating (6), will shine solar energy reflection on the reflectance coating (6) in the metal U-shaped in the pipe (3); On pipe (3) inwall enamel layer (5) is arranged in the said metal U-shaped, can prevent effectively that the infra-red radiation in the metal inner pipe from leaking outside; On pipe (3) outer wall enamel solar absorbing film (4) is arranged in the metal U-shaped, can effectively shine the solar energy on the pipe (3) in the metal U-shaped fast to absorbing.

2. the solar energy heat collection pipe of pipe in the metal U-shaped according to claim 1; It is characterized in that: the inwall of pipe (3) also is provided with the muscle (3e) that a circle is evenly arranged around circumference in the said metal U-shaped; It can the reinforcement metal U-shaped in the intensity of pipe (3); Can make the contact area of the water in managing (3) in the metal U-shaped and managing increase the raising efficiency of heating surface again.

3. the solar energy heat collection pipe of pipe in the metal U-shaped according to claim 1; It is characterized in that: said header tank has water inlet pipe and outlet pipe in (1), and two mouths of pipe of pipe (3) are respectively as import (3b) and outlet (3d) in the metal U-shaped, and import (3b) is communicated with the water inlet pipe that joins header tank (1); Outlet (3d) is communicated with the outlet pipe that joins header tank (1); So that water or air are got into by import (3b), flow out from outlet (3d), realize the circulation heating.