CN102654319B - Solar photo-thermal generating universal multifunctional composite tube - Google Patents

Abstract

The invention relates to a universal multi-functional composite pipe for solar thermal power generation, which includes a socketed metal inner pipe and a metal outer pipe, and a device is arranged between the metal inner pipe and the metal outer pipe to maintain the gap between the two layers of pipelines. The supporting frame of the gap; the metal outer tube is provided with an air inlet and an air outlet; the metal inner and outer tubes are connected with an air inlet pipe. The main feature of the invention is that the pipeline has composite functions such as heat preservation, heating, temperature measurement, pressure bearing, tensile resistance, leakage prevention, explosion-proof, high temperature resistance, and corrosion resistance. Both ends of the heat collecting tube are connected to meet various requirements of the pipeline at this part; the advantages of the present invention are: multiple functions, wide application range, simple structure, convenient installation and long service life.

Description

Universal multifunctional composite tube for solar thermal power generation

technical field

The invention relates to the field of photothermal power generation, in particular to a composite pipeline connected to both ends of a trough-type heat collecting tube.

Background technique

At present, in the photothermal power generation, chemical industry, heating, clothing, machinery and other industries, the media transported in the pipeline include medium and high temperature hot water, steam, high temperature oil, high temperature chemical raw materials, etc. In order to reduce the heat loss of the pipeline, the appearance of the pipeline Insulation is required. The basic method is to cover the surface of the pipeline with insulation cotton, and then cover the outside with aluminum plate, color steel plate or stainless steel to prevent wind, rain and snow;

The medium in the above-mentioned pipeline has continuous flow work and intermittent flow work, especially when the medium in the pipeline stops flowing and working, some medium will cool down and solidify. In this case, the medium in the pipeline needs to be heated up , to avoid solidification. At present, this problem has not been well resolved, and sometimes it will bring some unexpected troubles.

If the liquid transported in the pipe is oil, it will easily cause a fire when the oil leaks, and it will easily cause the oil in the pipeline to solidify when the ambient temperature is too low. Generally, in order to avoid the solidification of the medium, it is usually wound on the outer surface of the pipeline Heating wire or heating cable, but the outer pipeline of oil is generally not allowed to use heating parts that are prone to sparks to avoid fires; the current solution is mainly to prevent leakage, stop working when an accident occurs, and repair methods such as oil discharge and repair welding , others have no good solution.

For some places that need to be rotated, metal hoses are mainly used at present, and there are some disadvantages, such as single function, not easy to do heat preservation, or heat preservation will hinder the rotation to a certain extent.

Contents of the invention

The technical problem to be solved by the present invention is to propose a solar photothermal power generation universal multifunctional composite tube which is connected to both ends of the trough heat collecting tube and has the functions of heat preservation, heating and temperature measurement.

The technical solution adopted in the present invention is: a universal multifunctional composite pipe for solar thermal power generation, including a socketed metal inner pipe and a metal outer pipe. A support frame for the gap between the two layers of pipelines; the metal outer tube is provided with an air inlet and an air outlet; a high-pressure air inlet pipe is connected between the metal inner and outer tubes.

Specifically, both the metal outer tube and the metal inner tube of the present invention are corrugated tubes bent in any direction within the range of 360°. In this way, in some places that need to be rotated, the pipeline can be rotated arbitrarily as required without damage.

In order to reduce the heat radiation of the metal inner tube, the inner surface of the metal outer tube of the present invention is entirely coated with a metal coating. The metal coating can be a silver layer, an aluminum layer or any other metal coating.

Furthermore, in the present invention, a temperature measuring probe is fixed on the outer surface of the metal outer tube, and the temperature measuring probe is not in contact with the metal inner tube, but the temperature measuring probe can directly measure the temperature of the metal inner tube.

The outer surface of the outer metal tube of the present invention is axially provided with grooves, and the grooves are axially parallel to the circumference of the outer surface of the outer metal tube. Data cables or other electric wires can be placed in the groove, and the overall appearance is tidy and beautiful after installation.

Vacuum, inert gas or other high-temperature gas can be used between the inner and outer pipelines of the present invention. When the pipeline is in a vacuum state, it can keep warm, and when hot air or other gases are filled, the medium in the pipeline can be heated. , when filled with inert gas, it can play the role of flame retardant and explosion-proof.

The beneficial effects of the present invention are: the present invention has composite functions such as heat preservation, heating, temperature measurement, pressure bearing, tensile resistance, leakage prevention, explosion-proof, high temperature resistance, and corrosion resistance. The two ends of the trough-type heat collecting tube are connected to meet various requirements of the pipeline in this part; it has many functions, wide application range, simple structure, convenient installation and long service life.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural representation of the preferred embodiment of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1;

In the figure: 1. Metal inner tube; 2. Air inlet; 3. Metal outer tube; 4. High-pressure inlet pipe; 5. Temperature measuring probe; 6. Support frame; 7. Air outlet; 8. Groove.

Detailed ways

The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

As shown in Figures 1 and 2, a universal multifunctional composite tube for solar thermal power generation includes a socketed metal inner tube 1 and a metal outer tube 3, and a metal inner tube 1 and a metal outer tube 3 are provided for holding The support frame 6 in the gap between the two layers of pipelines; the metal outer pipe 3 is provided with an air inlet 2 and an air outlet 7; a high-pressure air inlet pipe 4 is connected between the metal inner and outer pipes. Both the metal outer tube and the metal inner tube are corrugated tubes bent in any direction within the range of 360°.

A temperature measuring probe 5 is fixed on the outer surface of the metal outer tube 3, and the temperature measuring probe 5 is not in contact with the metal inner tube 1, but the temperature measuring probe can directly measure the temperature of the metal inner tube. A groove 8 is axially arranged on the outer surface of the metal outer tube, and the groove is parallel to the circumferential axis on the outer surface of the metal outer tube.

When the medium in the metal inner tube 1 needs to be kept warm, the air inlet 2 is closed first, and the vacuum is drawn from the air outlet 7. When the vacuum degree reaches a certain value range, the heat conduction between the metal inner tube 1 and the metal outer tube 3 can be achieved. The heat convection is greatly reduced, so that the medium in the metal inner tube 1 can be kept warm;

When the medium (non-flammable) in the metal inner tube 1 needs to be heated, the air inlet 2 and the air outlet 7 are opened, and high-temperature air or steam is added from the air inlet 2 to heat the outer surface of the metal inner tube 1, and the heat is provided by the metal inner tube. The surface of tube 1 is transferred to the medium in the tube for heating purposes;

When the medium (flammable) in the metal inner tube 1 needs to be heated, the air inlet 2 and the air outlet 7 are opened, and high-temperature nitrogen or other inert gas is added from the air inlet 2 to heat the inner tube 1, and the heat is transferred to the inner tube. Medium for heating purposes; even if the flammable medium in the inner tube 1 leaks, it is not easy to burn or explode under the protection of inert gas;

When the metal inner tube 1 is filled with high-temperature medium, the metal inner tube 1 will expand rapidly, and the corrugated part of the metal outer tube 3 can be pulled apart at the same time to avoid being pulled apart; when the liquid temperature of the metal inner tube 1 drops, the inner tube 1 will continue to shrink, and the corrugated part of the metal outer tube 3 will also be compressed without being damaged;

When the medium in the pipeline needs to be emptied, open the high-pressure inlet pipe 4 and fill in a certain pressure of inert gas to discharge the medium in the pipeline, thereby protecting the pipeline or medium.

What is described in the above description is only the specific implementation of the present invention, and various illustrations do not limit the essence of the present invention. Those of ordinary skill in the art can modify or modify the previous specific implementation after reading the description. variations without departing from the spirit and scope of the invention.

Claims (5)

1. A solar thermal power generation universal multi-functional composite tube, characterized in that: it includes a metal inner tube and a metal outer tube that are socketed, and a two-layer tube for holding the metal inner tube and the metal outer tube is provided between the metal inner tube and the metal outer tube. A support frame for the gap between the roads; the metal outer pipe is provided with an air inlet and an air outlet; a high-pressure air inlet pipe is connected between the metal inner and outer pipes. 2. The universal multifunctional composite tube for solar thermal power generation according to claim 1, characterized in that: the metal outer tube and the metal inner tube are both corrugated tubes bent in any direction within the range of 360°. 3. The universal multifunctional composite tube for solar thermal power generation according to claim 2, characterized in that: the inner surface of the metal outer tube is entirely coated with a metal coating. 4. The solar thermal power generation universal multifunctional composite tube as claimed in claim 1, characterized in that: a temperature measuring probe is fixed on the outer surface of the metal outer tube, and the temperature measuring probe is not connected with the metal inner tube touch. 5. The universal multifunctional composite tube for solar thermal power generation according to claim 1, characterized in that: the outer surface of the metal outer tube is axially provided with a groove, and the groove is on the outer surface of the metal outer tube. The surfaces are axially parallel along the circumference.

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