CN208124654U - Solar energy heat collector towards seasonal frozen soil region subgrade engineering - Google Patents

Abstract

The utility model discloses a kind of solar energy heat collectors towards seasonal frozen soil region subgrade engineering, it is related to roadbed damage in permafrost regions Prevention Technique field, including ground heat collection unit and roadbed heating unit, ground heat collection unit includes absorbing pipe, the outer cover of absorbing pipe is equipped with outer tube, and heat-insulation chamber is formed between absorbing pipe and outer tube；Absorbing pipe is connected with the both ends of outer tube by sealing section；Roadbed heating unit includes heating tube, and the absorbing pipe is connected to the heating tube；Heat-transfer working medium is filled in absorbing pipe and the heating tube.The utility model rationally and effectively controls frozen earth roadbed seasonal heat budget balance, and antifreezing expansion effect is more effective；The energy has been saved, has been reduced costs and labor intensity；Collecting efficiency is high, frost resistance is good, anti-leak, and compact-sized, small in size, occupied area is small, and laying mode is flexible, and arrangement can be dispersed, compared to the Border Protection effect of existing thermal insulation material, the comprehensive short distance heat supply to frost heave stratum may be implemented.

Description

Solar energy heat collector towards seasonal frozen soil region subgrade engineering

Technical field

The utility model relates to permafrost region subgrade defect Prevention Technique fields, and in particular to one kind is towards seasonal frozen soil region The solar energy heat collector of subgrade engineering.

Background technique

Frozen soil refers to temperature at 0 DEG C or 0 DEG C hereinafter, and various ground and soil containing ice.The soil body is a kind of pair of temperature pole For sensitive material, under subzero temperature environment, water can congeal into ice and volume expansion in soil, thus reduce soil body pore volume, simultaneously Soil skeleton further deforms under the action of ice expands additional stress, and soil body physico-mechanical properties can great changes will take place.Season The freezing of frozen soil has larger impact to soil strength variation with thaw cycle process, thus roadbed be easy to occur in winter frost heave protuberance, Melt a series of freeze injuries such as rise soil in spring.

The generation of frost heaving must be provided simultaneously with the effect of soil property, temperature and water, as long as therefore eliminating these three factors In a generation for being prevented from Road Frost & Bulge phenomenon.In the case where engineering specifications is certain, temperature is to lead to subgrade defect Key factor, and guaranteeing all control measures effectively but disease still remains maximally efficient controllable factor. Currently, the engineering measure of prevention and treatment frost heave is mainly focused on improvement to soil property and handles the anti-row of water, including displacement banket method, Stablize soil facture, artificial salinization method and all kinds of waterproofs, draining, water proof measure.Displacement method, which refers to change using non-frost heave material, fills out Swelling soil, earth volume is larger, when needing long distance transportation displacement soil or larger soil removal and replacement depth, higher cost.Stablize soil processing Method refers to an appropriate number of cement treated weakness cohesive soil of incorporation, and subgrade strength and bearing capacity can be improved, and increases freeze proof and water resistant Performance, but cement dose is excessive is also easy to produce contraction fissure.Artificial salinization method refers to is mixed and stirred by punching note salt, dilution injection and earth salt The salinity that equal measures make to be dissolved in water in soil increases, and body frost heaving temperature is made to be less than fresh water freezing point, and this method is suitable for low temperature pole It is worth the slight section of higher disease to use, the new roadbed salination disease of the excessive easy appearance of dosage.Heat-insulated insulating layer method, which refers to, is banketing The thermal insulation materials such as middle setting polystyrene fill bed course on insulating layer, and temperature insulating material is more easily damaged during mechanical ramming. Therefore, existing roadbed frozen prevention measures lack the active control to temperature, and existing insulating layer method is also limited by roadbed side Boundary it is passive.

The starting point of the above measure is to overcome and delay roadbed frost damage, can only reduce frost heave, cannot eradicate freeze injury, belong to Preventative passive measure.Roadbed is still likely to occur a series of the problem of frost heaves cause under harsh climate, and needs continuous Put into maintenance cost.Therefore, frost zone frost failure aims at prevention at present, occurs in foundation frost heaving and influences road just Lack quickly and effectively control measures after normal safe operation.Cold area's high-speed railway, heavy haul railway construction satisfy the need base physical environment with More stringent requirements are proposed for environment conditioning technology, it is necessary to research and develop more efficiently active temperature regulation measure.

In renewable energy, solar energy is resource one kind the most abundant, widely distributed, is easily obtained.Wherein, the sun Energy solar thermal utilization is presently the most mature solar utilization technique.It is fortunately that China seasonal frozen soil region is in the sun Can, two, three classes area good one using condition, solar energy heat utilization has good applicable in cold area subgrade engineering Property.

Currently, solar energy heat utilization technology is mainly directed towards the industries such as living environment's control and industrial application, it is limited to subject Difference, then there are no be related to for the Solar use towards the application of roadbed environmental Kuznets Curves.

The diabatic process of roadbed and atmospheric environment includes two stages：In winter, when atmospheric environment is lower than roadbed temperature, It is conducted heat from roadbed to atmosphere, roadbed cooling；Except in winter, when atmospheric temperature is higher than roadbed temperature, passed from atmosphere to roadbed Heat, roadbed heating.In severe cold area, reachable -40 DEG C of winter minimum temperature, roadbed and under cover between stratum and atmosphere in winter The temperature difference will be generally higher than summer, while water becomes the thermal coefficient after ice and also will increase in soil, and the heat transfer efficiency in winter is caused to be wanted Greater than summer.Therefore, the main reason for cold area's roadbed freeze-harm, is the excessive heat loss in winter.So, from heat transfer improvement side Always it sees, on the one hand, heat transfer efficiency of the atmosphere to roadbed should be improved, roadbed is made to reach higher temperature water before arriving in winter It is flat to be conducive to offset cold season heat waste；On the other hand, an external heat source is provided in cold season, conducted heat to roadbed to compensate heat waste, it is real Now active heat supply.Therefore, for seasonal frozen soil region roadbed and under cover ground frost failure prevent and treat demand, be based on solar energy Heat utilization technology and China seasonal frozen soil region distribution of solar energy condition abundant develop towards seasonal frozen soil region subgrade engineering The solar energy heat collector of frost failure has huge application potential.

Utility model content

The purpose of this utility model is to provide a kind of can be realized to store up to the heat of roadbed and supplement in advance in real time, collects thermal effect Rate is high, frost resistance is good, anti-leak, compact-sized, small in size, and laying mode is flexible, may be implemented to the comprehensive of frost heave stratum The solar energy heat collector and method for being used to prevent and treat seasonal frozen soil region roadbed frost damage of short distance heat supply, to solve above-mentioned background Existing anti-freeze expansion technical effect is poor in technology, and maintenance cost is high, the technical problem of roadbed heat supply regulating effect difference.

To achieve the goals above, the utility model takes following technical solution：

The utility model provides a kind of solar energy heat collector towards seasonal frozen soil region subgrade engineering, the device packet Include ground heat collection unit and roadbed heating unit, the ground heat collection unit is for converting the solar into thermal energy, and by thermal energy Pass to the roadbed heating unit；The roadbed heating unit is for passing to the thermal energy that the ground heat collection unit is transmitted It is frozen earth roadbed；

The ground heat collection unit includes absorbing pipe, and the outer cover of the absorbing pipe is equipped with outer tube, the absorbing pipe with Heat-insulation chamber is formed between the outer tube；The absorbing pipe is connected with the both ends of the outer tube by sealing section；

The roadbed heating unit includes heating tube, and the absorbing pipe is connected to the heating tube；

Heat-transfer working medium is filled in the absorbing pipe and the heating tube.

Further, the lower end of the absorbing pipe passes through the sealing section and is connected to the heat supply by the first screwed flange Pipe.

Further, several conducting-heat elements are uniformly provided on the outer wall of the heating tube.

Further, the conducting-heat elements are the thermally conductive sheet being fixed in the heat supply pipe outer wall；Alternatively, the heat-conducting part Part is that one end is connected to the heating tube, the closed heat conducting pipe of the other end.

Further, the upper end of the absorbing pipe passes through the sealing section and is communicated with the second screwed flange, second spiral shell The upper end of line flange is equipped with blank flange, and the upper end of the blank flange is connected with pressure gauge by union elbow.

Further, getter is equipped in the heat-insulation chamber.

Further, the heat-transfer working medium is conduction oil.

Further, the outer wall of the absorbing pipe is equipped with sputtered coating absorbing solar energy selectively.

Further, the absorbing pipe is made of metal material, and the outer tube is made of glass, and the heating tube is by gold Belong to material to be made.

The utility model beneficial effect：The utility model may be implemented to store up the heat of roadbed in advance and supplement in real time, make up The passivity protective mechanism of existing measure can efficiently control the seasonal heat budget balance of roadbed；It is compact-sized, volume Small, occupied area is small, has independent thermal-arrest and heating part, and laying mode is flexible, meets the dispersibility distribution of frost failure Feature；Metal heat absorption tube has collecting efficiency height, frost resistance good, and structural strength is big, and sturdy and durable, the good feature of shock resistance mentions The security performance of subgrade engineering in high vibration environment；Can be according to the jelly depth range of seasonal frozen ground, the entirety of regulating device is long Degree, compared to the Border Protection effect of existing thermal insulation material, may be implemented the comprehensive short distance heat supply to frost heave stratum.

The additional aspect of the utility model and advantage will be set forth in part in the description, these will be from following description In become obvious, or recognized by the practice of the utility model.

Detailed description of the invention

It, below will be to required in embodiment description in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the utility model Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is the solar energy heat collector knot towards seasonal frozen soil region subgrade engineering described in the utility model embodiment Composition.

Fig. 2 is sectional view at A-A in Fig. 1.

Fig. 3 is sectional view at B-B in Fig. 1.

Fig. 4 is sectional view at C-C in Fig. 1.

Wherein：1- absorbing pipe；2- outer tube；3- heat-insulation chamber；4- sealing section；5- heating tube；6- heat-transfer working medium；The first spiral shell of 7- Line flange；8- conducting-heat elements；The second screwed flange of 9-；10- blank flange；11- union elbow；12- pressure gauge；13- getter； 14- solar selectively absorbing coating；15- flange gasket；16- bolt；17- spring support；18- vacuum tail mouth.

Specific embodiment

The embodiments of the present invention is described in detail below, the example of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below The embodiment for crossing attached drawing description is exemplary, and is only used for explaining the utility model, and cannot be construed to the utility model Limitation.

Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being used in the specification of the utility model Wording " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or Add other one or more features, integer, step, operation, element and/or their group.It should be understood that used herein " connection " or " coupling " may include being wirelessly connected or coupling, and the wording "and/or" used includes one or more associated Any cell for listing item and all combination.

Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in the utility model fields.Also It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.

The utility model for ease of understanding is with reference to the accompanying drawing further explained the utility model with specific embodiment Illustrate, and specific embodiment does not constitute the restriction to the utility model embodiment.

It should be appreciated by those skilled in the art that attached drawing is the schematic diagram of embodiment, the component in attached drawing is not necessarily Implement necessary to the utility model.

Embodiment one

The utility model embodiment one provides a kind of for preventing and treating the solar energy heating of seasonal frozen soil region roadbed frost damage Device, the device include ground heat collection unit and roadbed heating unit, and the ground heat collection unit is for converting the solar into Thermal energy, and transfer thermal energy to the roadbed heating unit；The roadbed heating unit is used to pass the ground heat collection unit The thermal energy passed passes to frozen earth roadbed.

As shown in Figure 1, for the solar energy collection towards seasonal frozen soil region subgrade engineering described in the utility model embodiment Thermal structure chart, the ground heat collection unit include absorbing pipe 1, and the absorbing pipe 1 is made of metal material, heat-collecting temperature Height has good heating conduction and processing performance, corrosion-resistant；The outer cover of the absorbing pipe 1 is equipped with outer tube 2, outer tube 2 For Pyrex 3.3, have many advantages, such as that transmittance is high, thermal stability is good, corrosion-resistant, resistance to mechanical impact.The absorbing pipe 1 and institute It states and is formed with heat-insulation chamber 3 between outer tube 2；The both ends of the absorbing pipe 1 and the outer tube 2 are connected by sealing section 4；Due to It is the heat-insulation chamber 3 of vacuum insulation between absorbing pipe 1 and outer tube 2, the outside windage of thermal energy is minimum.

The roadbed heating unit includes heating tube 5, and the lower end of absorbing pipe 1 passes through the sealing section 4 and passes through the first spiral shell Line flange 7 is connected to the heating tube 5；Heat-transfer working medium 6, the heat transfer work are filled in the absorbing pipe 1 and the heating tube 5 Matter 6 is conduction oil.In specifically used, the material of heat-transfer working medium is not limited by above-mentioned conduction oil.

As shown in figure 4, for the solar energy collection towards seasonal frozen soil region subgrade engineering described in the utility model embodiment Thermal heating tube sectional view, the thermal energy that absorbing pipe 1 is converted are transferred inwardly to the heat-transfer working medium 6 in metal heat absorption tube 1, thermal energy It is transferred in heating tube 5 through heat-transfer working medium 6, several conducting-heat elements 8 is uniformly provided on the outer wall of heating tube 5.Conducting-heat elements 8 can expand Greatly with the contact area of frozen soil, be conducive to improve transmission speed of the heat from heating tube 5 to frozen soil.The conducting-heat elements 8 are solid The heat transmission fin being scheduled on 5 outer wall of heating tube, heat transmission fin are the stronger copper strips of thermal conductivity or aluminium strip fin；Conducting-heat elements 8 can also be connected to for one end with the heating tube 5, the closed metal heat-conducting tube of the other end.

Getter 13 is equipped in the heat-insulation chamber 3.Getter 13 can absorb the gas generated in heat-insulation chamber 3 at any time, keep The vacuum degree of heat-insulation chamber 3, prevents heat from transmitting outward, keeps heat utilization ratio.

Settable spring support 17, absorbing pipe is fixed on central axis between absorbing pipe 1 and outer tube 2, enhancing dress The structural stability set prevents high temperature coating from touching outer tube 2 and damaging.

As shown in Fig. 2, for the solar energy collection towards seasonal frozen soil region subgrade engineering described in the utility model embodiment The upper end of the sectional view of thermal the second screwed flange and blank flange junction, the absorbing pipe 1 connects across the sealing section 4 It is connected with the second screwed flange 9, the upper end of second screwed flange 9 is equipped with blank flange 10, the upper end of the blank flange 10 Pressure gauge 12 is connected with by union elbow 11.When conduction oil when the temperature is excessively high, volume expansion can be generated and volatilization steam is existing As the rising condition of solar energy heat collection pipe internal pressure can be monitored in real time by pressure gauge 12, answered when there are security risk It takes emergency measures in time.

As shown in figure 3, for the solar energy collection towards seasonal frozen soil region subgrade engineering described in the utility model embodiment The outer wall of thermal absorbing pipe and outer tube sectional view, the absorbing pipe 1 is equipped with sputtered coating absorbing solar energy selectively 14, Solar selectively absorbing coating is optical-thermal conversion material.When sunlight is incident upon on metal heat absorption tube 1 through outer tube 2, Solar radiant energy is converted thermal energy by the solar selectively absorbing coating 14 of high-absorbility.

Device concrete operating principle described in the utility model is：There is the daytime shined upon, sunlight penetrates thermal-arrest The glass cloth pipe 2 of unit, is incident upon on metal heat absorption tube 1, and solar selectively absorbing coating 14 converts solar radiant energy For thermal energy.Thermal energy passes to the conduction oil in pipe by the tube wall of absorbing pipe 1, and the temperature of conduction oil increases, makes inside absorbing pipe 1 Conduction oil and heating tube 5 in conduction oil generate temperature difference, thermal energy passes from absorbing pipe 1 to the heating tube 5 of roadbed heating unit It passs.Under temperature difference driving effect, heat continuation is transmitted from heating tube 5 to conducting-heat elements 8, is passed to eventually by conducting-heat elements 8 Low temperature roadbed frozen soil around pipe, is achieved in the heat supply to seasonal frozen soil region roadbed.

Embodiment two

The utility model embodiment two provides the system of the solar energy heat collector towards seasonal frozen soil region subgrade engineering Make assemble method, in the present embodiment, the specific production step of the ground heat collection unit includes：

(a) a certain length stainless steel tube is selected, in the outer wall sputtered coating absorbing solar energy selectively of stainless steel tube, Each remaining 5cm blank in stainless steel tube both ends, as metal heat absorption tube；

(b) glass tube for differing 10cm with metal heat absorption tube length is selected, using glass-to-metal seal section by metal Absorbing pipe and glass tube sealing socket, the blank parts of metal heat absorption tube end 5cm length are in the outer of glass-to-metal seal section Side；

(c) interlayer space between metal heat absorption tube and glass tube is vacuumized by vacuum tail mouth 18, obtains heat-insulation chamber；

(d) screwed flange is respectively welded on the top of stainless steel tube and bottom end.

The specific production step of the roadbed heating unit includes：

(a) the metal base tube of a certain length is selected, bottom end welding is shut, and screwed flange is welded on top；

(b) heat transmission fin is welded on the outer wall of metal base tube；

The specific assemble method of solar energy heat collector described in the utility model embodiment is：

(a) the sealing docking of bolt 16, gold are used after the screwed flange of solar thermal unit bottom end being placed flange gasket 15 The inside for belonging to absorbing pipe and metal base tube is through-void；

(b) it by the screwed flange at the top of metal heat absorption tube, is perfused to the inside of metal heat absorption tube and metal base tube thermally conductive Oil；

(c) pressure gauge is welded on blank flange by curved pass joint；

(d) use bolt 16 close after flange gasket 15 being placed between the screwed flange at the top of blank flange and metal heat absorption tube Envelope docking.

Vertical type columnar structure is integrally formed in solar energy heat collector after assembling, and the structure type of vertical type columnar makes device Structure is more compact, small in size, and occupied area is small, and laying mode is flexible, meets the dispersed distribution characteristics of frost failure；May be used also According to the jelly depth range of seasonal frozen ground, the length of regulating device absorbing pipe, heating tube, compared to the Border Protection of existing thermal insulation material The comprehensive short distance heat supply to frost heave stratum may be implemented in effect.

Embodiment three

The utility model embodiment three provides the reality of the solar energy heat collector towards seasonal frozen soil region subgrade engineering Applying method, the implementation method include the following steps：

Step S110：Determine the frost heave depth bounds that seasonal frozen ground layer is covered under roadbed；In winter by lay thermometer hole and The measurement method in deformation monitoring hole determines the frost heave depth bounds of seasonal frozen ground in conjunction with geology radar survey；

Step S120：Measure the thermal physical property parameter and thermic load on seasonal frozen ground stratum；It is tested, is determined by geo-thermal response test Stratum thermal physical property parameter sets the modification scope of seasonal frozen ground temperature, calculates the thermic load of seasonal frozen ground roadbed；

Step S130：Determine the design parameter of solar energy heat collection pipe；According to the frost heave depth bounds of seasonal frozen ground roadbed and Thermic load determines the installation position and heating range of solar energy heat collection pipe, determine absorbing pipe, outer tube and heating tube diameter and Highly and the laying spacing of solar energy heat collector；

Step S140：Drilling construction installs solar energy heat collector；It is drilled with hole by no-dig technique mechanical hole building mode, By in the roadbed heating unit embedment pore-forming of solar energy heat collector, the backfill of hole gap is closely knit after the completion of laying.

In conclusion the operational effect of the utility model is, in summer, intensity of solar radiation is big, the sun more than earth's surface The photothermal conversion efficiency that hot arc can be collected is higher, heat transfer efficiency of the atmosphere to roadbed can be enhanced, and by roadbed for hot arc Roadbed is transferred heat to, using roadbed as a heat carrier, roadbed temperature is improved and stores heat, for offsetting in winter Roadbed loses to the heat transfer of atmospheric environment.In winter, under fair weather, when oil temperature thermally conductive in solar energy heating section is higher than When roadbed temperature, it can also conduct heat to roadbed, with real-time compensation thermal loss.In the annual heat supply of summer heat accumulation and winter concurrent heating Under the conditions of, roadbed temperature is maintained into a higher level, to weaken frost heave degree, when temperature freezes temperature higher than roadbed material When spending, frost heaving can be eliminated.

Specifically, the utility model is realized compared to frozen prevention measures such as existing soil improvement, guarded drainage, thermal insulation materials The heat of roadbed is stored up and supplement in real time in advance, compensates for the passivity protective mechanism of existing measure, more efficiently control road The seasonal heat budget of base balances, and anti-freeze expansion mechanism is more effectively and advanced；Based on solar energy techniques, belong to new energy Utilization technology, can be realized compared to other heat supply process it is unattended, whole year all in working condition, have in cold area subgrade engineering There is huge application advantage；Compared to common all-glass vacuum thermal-collecting tube, the heat-collecting temperature of metal heat absorption tube is high, in winter will not Bursting by freezing occurs, has good collecting efficiency height, frost resistance, anti-leak, structural strength big, sturdy and durable, shock resistance is good, is applied to shake Security performance is high when the subgrade engineering in rotating ring border；The structure type of vertical type columnar makes compact-sized, and small in size, occupied area is small, With independent thermal-arrest and heating part, laying mode is flexible, meets the dispersed distribution characteristics of frost failure；It can be according to season The jelly depth range of frozen soil adjusts roadbed for the length of hot arc, compared to the Border Protection effect of existing thermal insulation material, may be implemented pair The comprehensive short distance heat supply on frost heave stratum.

Those of ordinary skill in the art will appreciate that：The component in device in the utility model embodiment can be according to reality The description for applying example is distributed in the device of embodiment, can also carry out corresponding change positioned at one or more different from the present embodiment In a device.The component of above-described embodiment can be merged into a component, can also be further split into multiple subassemblies.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should It is subject to the protection scope in claims.

Claims (9)

1. a kind of solar energy heat collector towards seasonal frozen soil region subgrade engineering, it is characterised in that：Including ground thermal-arrest list Member and roadbed heating unit, the ground heat collection unit transfer thermal energy to the road for converting the solar into thermal energy Base heating unit；The roadbed heating unit is frozen earth roadbed for passing to the thermal energy that the ground heat collection unit is transmitted；

The ground heat collection unit includes absorbing pipe (1), and the outer cover of the absorbing pipe (1) is equipped with outer tube (2), the heat absorption Heat-insulation chamber (3) are formed between pipe (1) and the outer tube (2)；The both ends of the absorbing pipe (1) and the outer tube (2) are logical Cross sealing section (4) connection；

The roadbed heating unit includes heating tube (5), and the absorbing pipe (1) is connected to the heating tube (5)；

Heat-transfer working medium (6) are filled in the absorbing pipe (1) and the heating tube (5).

2. the solar energy heat collector according to claim 1 towards seasonal frozen soil region subgrade engineering, it is characterised in that： The lower end of the absorbing pipe (1) passes through the sealing section (4) and is connected to the heating tube (5) by the first screwed flange (7).

3. the solar energy heat collector according to claim 1 towards seasonal frozen soil region subgrade engineering, it is characterised in that： Several conducting-heat elements (8) are uniformly provided on the outer wall of the heating tube (5).

4. the solar energy heat collector according to claim 3 towards seasonal frozen soil region subgrade engineering, it is characterised in that： The conducting-heat elements (8) are the thermally conductive sheet being fixed on the heating tube (5) outer wall；Alternatively, the conducting-heat elements (8) are one end It is connected to the heating tube (5), the closed heat conducting pipe of the other end.

5. the solar energy heat collector according to claim 1 towards seasonal frozen soil region subgrade engineering, it is characterised in that： The upper end of the absorbing pipe (1) passes through the sealing section (4) and is communicated with the second screwed flange (9), second screwed flange (9) Upper end be equipped with blank flange (10), the upper end of the blank flange (10) is connected with pressure gauge by union elbow (11) (12)。

6. the solar energy heat collector according to claim 5 towards seasonal frozen soil region subgrade engineering, it is characterised in that： Getter (13) are equipped in the heat-insulation chamber (3).

7. the solar energy heat collector according to claim 1 towards seasonal frozen soil region subgrade engineering, it is characterised in that： The heat-transfer working medium (6) is conduction oil.

8. the solar energy heat collector according to claim 1 towards seasonal frozen soil region subgrade engineering, it is characterised in that： The outer wall of the absorbing pipe (1) is equipped with solar selectively absorbing coating (14).

9. the solar energy heat collector according to claim 1-8 towards seasonal frozen soil region subgrade engineering, It is characterized in that：The absorbing pipe (1) is made of metal material, and the outer tube (2) is made of glass, the heating tube (5) by Metal material is made.