CN202947354U

CN202947354U - Upholder for high-temperature heat collecting pipe

Info

Publication number: CN202947354U
Application number: CN 201220513522
Authority: CN
Inventors: 田英良; 邵艳丽; 孙诗兵; 张静
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2012-10-08
Filing date: 2012-10-08
Publication date: 2013-05-22
Anticipated expiration: 2022-10-08

Abstract

The utility model discloses an upholder for a high-temperature heat collecting pipe and belongs to the field of photo-thermal utilization. The upholder is located between an inner pipe of the heat collecting pipe and an outer pipe of the heat collecting pipe and plays the effect of supporting. The upholder is suitable for the heat collecting in which the inner pipe is a metal pipe, and the outer pipe is a glass pipe. Metal-glass sealing-in is adopted by end heads. Vacuum is formed between the inner pipe and the outer pipe, and a medium temperature of the inner pipe reaches more than 150 degrees. And the upholder is more suitable for a pipe with the length more than 2 meters. The upholder for the high-temperature heat collecting pipe comprises an inner ring (5-2), a supporting arm (5-3) or a connecting component (5-3'), a bearing surface (5-4) and a fastening screw (5-5). The inner ring (5-2) is near to a outer track of the metal pipe (1) of the heat collecting pipe and can be sleeved on the metal pipe (1). The fastening screw (5-5) which is used for fixing the upholder is arranged on the inner ring (5-2) and can be used for fixing the upholder at the corresponding position of the metal pipe (1). The bearing surface (5-4) is connected with the inner ring (5-2) through the supporting arm (5-3) or the connecting component (5-3').

Description

The effective supporter of a kind of high-temperature heat-gathering

Technical field

A kind of supporter of high-temperature heat-collection pipe, this supporter are between the thermal-collecting tube inner and outer tubes plays a supporting role, and the utility model technology belongs to the solar thermal utilization field.

Background technology

The solar energy heat utilization is that solar energy is carried out optical focus, the medium that reaches in heat pipe is heated, then produce high temperature and high pressure steam by heat exchange method, can realize industry heating, food manufacturing, desalinization, and the driving steam turbine generating, be a photo-thermal merit conversion process.

The slot type heat collection technology is that thermal-collecting tube is placed on the focal position of a parabolic mirror, luminous energy is gathered on thermal-collecting tube by the total reflection of parabolic mirror, making light energy conversion is heat energy, with the dielectric heating in thermal-collecting tube to 150-450 ℃, higher temperature even, the temperature (below 100 ℃) of comparing the regular solar vacuum heat collection pipe exceeds a lot, belongs to middle high temperature heat utilization technology, and therefore must have reliable and stable middle high-temperature heat-collection pipe realizes the solar energy utilization.

Middle high-temperature heat-collection pipe generally is comprised of glass outer tube (abbreviation glass tube) and plated film stainless steel inner tube (abbreviation metal tube), adopt expansion joint that glass tube and metal are linked together in the end, extract the gas between glass tube and metal tube out, make between glass tube and metal tube and form vacuum, has good heat insulating function, can realize that like this heat farthest collects, can prevent heat loss again.

For middle high thermal-collecting tube, keeping its vacuum-tightness is key point, also the key of keeping the efficient operation of middle high thermal-collecting tube, but in engineering is used, find to have a lot of in the glass-to-metal seal position of high-temperature heat-collection pipes be easy to leak air and cause losing efficacy.

The analysis found that: at present, in engineering, middle high-temperature heat-gathering length of tube used has reached 4.06 meters, and is even longer, the multiplex stainless steel metal pipe of inner tube, wall thickness 2mm, metal tube diameter 50-70mm; The inner tube circulation medium mostly is conduction oil or fused salt, and conduction oil proportion is 0.80-0.90, and fused salt proportion is 1.40-1.80; Glass tube thickness is 2.8-3.2mm.Take 4.06 meters and heat pipe as example, the metal tube quality is about the 15-16 kilogram, conduction oil or fused salt quality are about the 10-20 kilogram, and the glass tube quality is about the 10-12 kilogram, and the middle high-temperature heat-collection pipe actual mass of such one 4.06 meters is in 35-45 kilogram scope, in engineering is used, middle high-temperature heat-collection pipe two ends rely on stent support, because middle high-temperature heat-collection pipe belongs to slim-lined construction, are subjected to gravity and moment loading, its central part naturally can produce and be bent downwardly, and its crooked schematic diagram is seen shown in accompanying drawing 1.Cause the bending of glass tube to metal-glass sealing position 3 transmission at middle high-temperature heat-collection pipe two ends, 3 places produce bending function at the metal-glass sealing position, and are although outer expansion joint 2 can be alleviated bending function strength, limited after all.When thermal-collecting tube is subjected to thermal change, for example, be subjected to the terrestrial solar radiation Strength Changes, in metal tube, raising and reducing can appear in medium temperature, causes the thermal-collecting tube bending amplitude to produce marked change, causes the reciprocal bending function of sealing-in position appearance, aggravated the fatigue effect at sealing-in position, cause the inefficacy acceleration at sealing-in position, average exhaustion run is 3-5, and therefore must take the necessary measures solves.

The utility model content

The utility model is found by large quantity research: for high-temperature heat-collection pipe in the through type that overcomes the inner and outer pipes structure because of self gravitation and moment loading, and when being subjected to the solar irradiation Strength Changes, the metal tube dilatancy increases the serial alternation effects such as the bending amplitude change is large that cause, cause the glass-to-metal seal position at middle high-temperature heat-collection pipe two ends to produce bending function repeatedly, the utility model is solved by the supporter mode is set in high-temperature heat-collection pipe in the through type of inner and outer pipes structure.

High-temperature heat-collection pipe in the through type of supporter 5 suitable inner and outer pipes structures of the present utility model, and further being applicable to inner tube is metal tube 1, outer tube is the thermal-collecting tube of glass tube 4, metal-glass sealing is adopted in the end, form vacuum between inner and outer pipes, and the inner tube medium temperature can reach 150-450 ℃, even higher temperature.Its length is greater than 2 meters, and the metal tube diameter is greater than the major diameter thermal-collecting tube of 50mm.

The effective supporter of a kind of high-temperature heat-gathering, it is characterized in that: above support comprises: interior ring 5-2, support arm 5-3 or connector 5-3 ', supporting surface 5-4 and trip bolt 5-5; Interior ring 5-2 is enclosed within outside metal tube 1;

Be useful on the trip bolt 5-5 that above support 5 is fixing on interior ring 5-2, supporter 5 can be fixed on the relevant position of metal tube 1, supporting surface 5-4 is connected on interior ring 5-2 external diameter by support arm 5-3 or connector 5-3 '; The structural supporting surface of above support 5 is 3-6 arc, is perhaps the annular of 1 sealing.

The arrangement pitch of supporter on metal tube is 0.8-1.5 rice.

Further, above support 5 materials are characterised in that: the interior ring 5-2 material requirements near metal tube one side can tolerate the high temperature of 150-450 ℃.Supporting surface 5-4 material near glass tube one side is organic material, ceramic material or metal material; When supporting surface 5-4 material was metal material, support arm 5-3 or the connector 5-3 ' of connection metal material were necessary for organic material or ceramic material.

This supporter 5 is between the metal tube 1 of thermal-collecting tube and glass tube 6 plays a supporting role, and this supporter has higher mechanical property, lower heat-conductive characteristic, stronger heat resistance.Alleviate thermal-collecting tube because of the degree of crook of Action of Gravity Field, reduce stressed the concentrating of the metal-glass sealing termination of thermal-collecting tube, avoid the inefficacy of metal-glass sealing termination, high-temperature heat-collection pipe service life in prolongation, detect by leak rate, calculate its service life and can reach more than 25 years, compare original 3-5 service life, the thermal-collecting tube life-span is increased dramatically.

Description of drawings

Fig. 1 is the stressed crooked schematic diagram of high-temperature heat-collection pipe.

Fig. 2 places the support structure schematic diagram between the inner and outer pipes of high temperature and heat pipe.

Fig. 3 (a) is the point-like support structure chart of supporter.

Fig. 3 (b) is the ring-type supporting construction figure of supporter.

Serial number name:

The 1-metal tube, the outer expansion joint of 2-, 3-metal-glass sealing position, 4-glass tube, 5-supporter; Ring in 5-1-supporter inner chamber, 5-2--, 5-3 support arm, 5-3 '---connector, 5-4--supporting surface, 5-5--trip bolt.

The specific embodiment

Supporter 5 of the present utility model is between metal tube 1 and glass tube 4 plays a supporting role, its structural representation as shown in Figure 2, can alleviate the degree of crook of thermal-collecting tube, reduce the stressed concentration problem of the metal-glass sealing termination of thermal-collecting tube, avoid the inefficacy of metal-glass sealing termination, high-temperature heat-gathering tube lifetime in prolongation.Its architectural feature is seen accompanying drawing 3(a), comprise shown in 3 (b): interior ring 5-2, support arm 5-3 or connector 5-3 ', supporting surface 5-4, trip bolt 5-5.Interior ring 5-2 is enclosed within on the metal tube 1 of thermal-collecting tube, and the trip bolt 5-5 in rotation on ring 5-2 is fixed on supporter 5 on the relevant position of metal tube 1, and supporting surface 5-4 is by ring 5-2 in support arm 5-3 or connector 5-3 ' connection.The structural design aspect of supporter 5, supporting surface 5-4 can be comprised of 3-6 arc, belonging to small size supports, perhaps adopt the annular of 1 sealing to form, belong to ring surface and support, arc supports the heat transmission that can reduce to glass tube, reduce thermal loss, but can produce stress on supporting surface and concentrate situation, ring surface supports just opposite, and therefore two kinds of structures cut both ways.The spacing that supporter 5 is arranged between the inner and outer pipes of thermal-collecting tube is preferably 0.8-1.5 rice.

Supporter 5 materials of the present utility model are characterised in that: can be the homogenous material of ceramic material or organic material, also metal material and ceramic material or organic material compound, also but metal material, ceramic material, organic material three compound.Be at supporter 5 combination of materials relationship characteristics: the interior ring 5-2 material requirements near metal tube one side can tolerate 150-450 ℃, even higher temperature.Supporting surface 5-4 material organic material, ceramic material near glass tube one side, metal material even, the support arm 5-3 of connection metal material or connector 5-3 ' are necessary for organic material or the ceramic material of low thermal conductivity, effectively isolated heat reduces the heat transmission of supporter to glass tube thermal shock effect to the supporting surface transmission.

Claims

1. effective supporter of high-temperature heat-gathering, it is characterized in that: above support comprises: supporter inner chamber (5-1), interior ring (5-2), support arm (5-3) or connector (5-3 '), supporting surface (5-4) and trip bolt (5-5); Interior ring (5-2) is enclosed within outside metal tube (1);

Interior ring (5-2) is provided with for the trip bolt (5-5) that above support is fixing, supporter can be fixed on the relevant position of metal tube (1), supporting surface (5-4) is connected on interior ring (5-2) external diameter by support arm (5-3) or connector (5-3 '); Supporting surface (5-4) on above support (5) is 3-6 arc, is perhaps the annular of 1 sealing.

2. supporter according to claim 1, it is characterized in that: the arrangement pitch of supporter (5) on metal tube (1) is 0.8-1.5 rice.

3. supporter according to claim 1, it is characterized in that: above support (5) material is characterised in that: interior ring (5-2) material requirements near metal tube one side can tolerate the high temperature of 150-450 ℃; Supporting surface (5-4) material near glass tube one side is organic material, ceramic material or metal material; When supporting surface (5-4) material was metal material, the support arm of connection metal material (5-3) or connector (5-3 ') were necessary for organic material or ceramic material, reach the heat insulating effect.