CN102778059A

CN102778059A - Solar collector tube with inner metal tube

Info

Publication number: CN102778059A
Application number: CN2012102510118A
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 collector tube with an inner metal tube comprises an outer glass tube and an inner tube sleeved inside the outer glass tube, and a vacuum cavity is formed between the outer glass tube and the inner tube. The solar collector tube is characterized in that the inner tube is the metal tube with two ends open, ribs which are circumferentially and uniformly distributed are arranged on the inner wall of the inner tube, the two ends of the inner metal tube are inserted into water collecting headers to be fixedly connected with the water collecting headers after extending out of the outer glass tube, threads at the two ends of the inner glass tubes are connected with the water collecting headers by conical surfaces arranged on lower sides of the threads, sealing rings are arranged on the conical surfaces, so that gaps at joints of the inner glass tube and the water collecting headers are prevented, and water leakage is prevented; and a semi-arc-shaped reflecting film is arranged on a portion, which faces the sun, of the inner surface of the outer glass tube, the outer glass tube and the inner metal tube are arranged eccentrically, and the inner metal tube is positioned at a focusing position of the reflecting film, so that sunlight irradiating on the reflecting film is focused into the inner metal tube. The solar collector tube with the inner metal tube overcomes shortcomings of an existing thermal collector, is used for the thermal collector, and has the advantages of reliability in use, difficulty in bursting, high thermal utilization factor and the like.

Description

The solar energy heat collection pipe of metal inner pipe

One, technical field

The present invention relates to a kind of solar energy heat collection pipe, especially a kind of solar energy heat collection pipe that is used for the metal inner pipe of heat collector.

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 easy to generate booster because the inner and outer pipes temperature difference produces thermal stress; 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, a kind of solar energy heat collection pipe that is used for the metal inner pipe of heat collector is provided, it is had use reliably, be difficult for characteristics such as explosion, heat utilization efficiency height.

The objective of the invention is to adopt following scheme to realize: a kind of solar energy heat collection pipe of metal inner pipe; It is made up of glass outer tube and the interior pipe that is enclosed within the glass outer tube; Be vacuum chamber between glass outer tube and the interior pipe; Be characterized in: pipe is the metal tube of both ends open in said, and wall is provided with the muscle that a circle is evenly arranged around circumference within it; Said metal inner pipe two ends are stretched out to insert behind the glass outer tube and are joined in the header tank fixingly through being threaded, and the following conical surface with the dress sealing ring of screw thread connects, and make itself and water tank junction seamless, prevent the generation of leaking; The outer pipe internal surface of said glass has the reflectance coating of semicircular arc towards the part of the sun, said glass outer tube and the eccentric setting of metal inner pipe, and metal inner pipe is positioned at focusing place of reflectance coating, will shine sunshine reflect focalization on the reflectance coating in metal inner pipe.The enamel solar absorbing film is arranged on the metal inner pipe outer wall, can fast and effeciently absorb the solar energy that shines on the metal inner pipe; On the metal inner pipe inwall, enamel layer is arranged, can prevent effectively that the infra-red radiation in the metal inner pipe from leaking outside.

Above-mentioned muscle can reinforcement metal in the intensity of pipe, the contact area of the water in metal inner pipe and the pipe is increased, improve the efficiency of heating surface.

The setting of above-mentioned metal inner pipe outer wall enameling can also only need its contact site of high-frequency heating when the glass outer tube is connected fixedly with metal inner pipe, just can enamel be dissolved in its contact site, makes it airtight seamless; Above-mentioned 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 dissolved in its contact site, makes it airtight seamless.

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; 3) this solar energy heat collection pipe can be used for running water heating or air heat.

Four, description of drawings

Fig. 1 is the three-dimensional structure diagram of the solar energy heat collection pipe of metal inner pipe of the present invention;

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

Fig. 3 is a metal inner pipe and the sketch map that is connected that joins header tank among the present invention.

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

1-glass outer tube; The 2-metal inner pipe; The 2a-external screw thread; The 2b-sealing ring; The 2c-male cone (strobilus masculinus); The 2d-muscle; 3-enamel solar absorbing film; The 4-enamel layer; The 5-reflectance coating; 6-joins header tank; The 6a-internal thread; The 6b-inner conical surface.

Five, the specific embodiment

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

As shown in Figure 1, a kind of solar energy heat collection pipe of metal inner pipe, it comprises glass outer tube 1, is enclosed within the metal inner pipe 2 in the glass outer tube 1, is vacuum chamber between glass outer tube 1 and the metal inner pipe 2.

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

Metal inner pipe 2 is a both ends open, and two ends are stretched out glass outer tube 1 back and inserted in the couplet header tank 6 fixing through being threaded.As shown in Figure 3, metal inner pipe 2 ports have external screw thread 2a, male cone (strobilus masculinus) 2c are set below the external screw thread 2a, and sealing ring 2b is housed on the male cone (strobilus masculinus) 2c; Join header tank 6 and be provided with corresponding internal thread 6a and inner conical surface 6b.During connection, the internal thread 6a on the couplet header tank 6 and the external screw thread 2a of metal inner pipe 2 are meshing with each other, and the inner conical surface 6b on the couplet header tank 6 and the male cone (strobilus masculinus) 2c of metal inner pipe 2 seal through sealing ring 4b each other, make its junction seamless, can prevent the generation of leaking.

As shown in Figure 2; Glass outer tube 1 inner surface has the reflectance coating 5 of semicircular arc towards the part of the sun; Glass outer tube 1 and metal inner pipe 2 eccentric settings, metal inner pipe 2 is positioned at focusing place of reflectance coating 5, will shine sunshine reflect focalization on the reflectance coating 5 in metal inner pipe 2.On metal inner pipe 2 outer walls enamel solar absorbing film 3 is arranged, can fast and effeciently absorb the solar energy that shines on the metal inner pipe; On metal inner pipe 2 inwalls one deck enamel layer 4 is arranged, can prevent effectively that the infra-red radiation in the metal inner pipe from leaking outside.

When at glass outer tube 1 with metal inner pipe 2 fixedly the time, only its contact site of need high-frequency heating just can fuse into its contact site with enamel material, 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 dissolved in its contact site, makes it airtight seamless.

The operating process of the solar energy heat collection pipe of metal inner pipe of the present invention is following:

When this thermal-collecting tube uses on heat collector; Solar irradiation is on solar energy heat collection pipe; See through glass outer tube 1 and shine on the enamel solar absorbing film 3 and collect, and be transmitted on the metal inner pipe 2, it can be heated the water through metal inner pipe 2; And do not shine the sunshine on the enamel solar absorbing film 3, absorb to enamel solar absorbing film 3 by reflectance coating 5 reflect focalizations.

Claims

1. the solar energy heat collection pipe of a metal inner pipe; It is by glass outer tube (1) and be enclosed within the interior pipe formation in the glass outer tube (1); Be vacuum chamber between glass outer tube (1) and the interior pipe; It is characterized in that: pipe is the metal tube of both ends open in said, and wall is provided with the muscle (2d) that a circle is evenly arranged around circumference within it; Said metal inner pipe (2) two ends are stretched out glass outer tube (1) back and are inserted and join in the header tank (6) fixingly through being threaded, and the following conical surface with dress sealing ring (2b) of screw thread connects, and make itself and water tank junction seamless, prevent the generation of leaking; Said glass outer tube (1) inner surface has the reflectance coating (5) of semicircular arc towards the part of the sun; Said glass outer tube (1) and metal inner pipe (2) are eccentric to be provided with; Metal inner pipe (2) is positioned at focusing place of reflectance coating (5), will shine sunshine reflect focalization on the reflectance coating (5) in metal inner pipe (2).

2. the solar energy heat collection pipe of metal inner pipe according to claim 1 is characterized in that: on said metal inner pipe (2) outer wall enamel solar absorbing film (3) is arranged, can fast and effeciently absorb the solar energy that shines on the metal inner pipe (2); On metal inner pipe (2) inwall, enamel layer (4) is arranged, can prevent effectively that the infra-red radiation in the metal inner pipe (2) from leaking outside.