CN111156713A - Straight-through pressure-bearing type vacuum tube heat collector - Google Patents
Straight-through pressure-bearing type vacuum tube heat collector Download PDFInfo
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- CN111156713A CN111156713A CN202010060418.7A CN202010060418A CN111156713A CN 111156713 A CN111156713 A CN 111156713A CN 202010060418 A CN202010060418 A CN 202010060418A CN 111156713 A CN111156713 A CN 111156713A
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- 238000001125 extrusion Methods 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
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- 210000004907 gland Anatomy 0.000 description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/40—Preventing corrosion; Protecting against dirt or contamination
- F24S40/46—Maintaining vacuum, e.g. by using getters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/60—Details of absorbing elements characterised by the structure or construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
- F24S80/65—Thermal insulation characterised by the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/70—Sealing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/74—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other
- F24S10/742—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other the conduits being parallel to each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
Abstract
The invention belongs to the technical field of solar equipment, and discloses a straight-through pressure-bearing type vacuum tube heat collector, which comprises: a straight-through solar vacuum tube; the first collecting pipe is communicated with one end of the straight-through solar vacuum pipe; a first header surrounding the first header to insulate the first header; the second collecting pipe is communicated with the other end of the straight-through solar vacuum pipe; a second header surrounding the second header to insulate the second header; a first seal. The straight-through pressure-bearing type vacuum tube heat collector has a simple structure, can operate under pressure, is convenient to install and replace because the collecting pipes are connected with the vacuum tubes through the sealing nuts, is straight-through between the upper collecting pipe and the lower collecting pipe, has small resistance, can be connected in series and in parallel in a large area, has high heat transfer efficiency because the heat absorbing element is a heat transfer element, is not limited by an installation angle, is easy to empty through pipes, and does not freeze a system.
Description
Technical Field
The invention relates to the technical field of solar equipment, in particular to a straight-through pressure-bearing type vacuum tube heat collector.
Background
With the improvement of living standard of people, the solar heat collector is widely used as an energy-saving device for people. The current heat collectors on the market mainly comprise the following parts: the heat collecting tube is easy to be damaged due to the fact that the pressure difference between a water inlet and a water outlet of the U-shaped tube is small, the U-shaped tube is easy to be oxidized due to overheating, so that the heat collecting tube fails to collect heat, and the heat pipe type solar collector can only be placed vertically or obliquely for use and cannot be used horizontally; the heat dissipation area of the condensation end of the heat pipe is small, and the heat transfer efficiency is influenced; the water in contact with the condensation end of the heat pipe is in a relatively static state, which also reduces the heat transfer efficiency of the heat pipe; although no water flows into the vacuum glass tube and the heat tube of the heat tube type vacuum tube, the interior of the vacuum glass tube and the interior of the heat tube cannot be scaled, the condensation end of the heat tube can be scaled in use, and the heat transfer efficiency of the heat tube is reduced.
For example, chinese utility model patent application No. CN201520631479.9 discloses a horizontal U-tube evacuated solar collector, which comprises a frame, a vacuum tube, a U-tube, and a header tube, wherein the U-tube is located in the vacuum tube, and a water inlet channel and a water outlet channel are arranged in the header tube; the upper end of the water inlet flow passage is positioned in the header pipe and is a blind end, and the lower end of the water inlet flow passage is a water inlet positioned below the header pipe; the lower end of the water outlet flow channel is positioned in the header and is a blind end, the upper end of the water outlet flow channel is a water outlet, and the water outlet is positioned above the header; the connecting pipe is filled with heat insulation materials; two ends of the U-shaped pipe are respectively communicated with the water inlet flow passage and the water outlet flow passage; the method is characterized in that: a horizontal included angle is formed between the axes of the two straight pipes of the U-shaped pipe and a horizontal plane, and the horizontal included angles between the axes of the two straight pipes of the U-shaped pipe and the same horizontal plane are equal; the axes of the two straight pipes of the U-shaped pipe are vertical to the axis of the header pipe; one end of the bent pipe part of the U-shaped pipe is higher than the pipe orifice end of the U-shaped pipe.
The above prior art discloses a solar heat collector, which adopts a U-shaped tube, and thus has the technical problems as described above.
Based on the technical problems in the prior art, the inventor provides a straight-through pressure-bearing type vacuum tube heat collector by combining years of research and development experiences.
Disclosure of Invention
The invention provides a straight-through pressure-bearing type vacuum tube heat collector which is simple in structure and capable of bearing pressure, a collecting pipe is connected with a vacuum tube through a sealing nut, the installation and the replacement are convenient, the upper collecting pipe and the lower collecting pipe are straight-through, the resistance is small, the upper collecting pipe and the lower collecting pipe can be connected in series and in parallel in a large area, a heat absorbing element is also a heat transfer element, the heat transfer efficiency is high, the heat transfer element is not limited by an installation angle, the straight-through pipe is easy to evacuate, a system is not.
In order to achieve the purpose, the invention adopts the following technical scheme:
a straight-through pressure-bearing type evacuated tube collector, comprising:
the straight-through solar vacuum tube absorbs solar radiation, converts the solar radiation into heat energy and transmits the heat energy to a medium in the straight-through solar vacuum tube;
the first collecting pipe is communicated with one end of the straight-through solar vacuum pipe to receive the medium flowing into the straight-through solar vacuum pipe or inject the medium into the straight-through solar vacuum pipe;
the first header is surrounded outside the first header to insulate the first header, and joints for water inlet and outlet are respectively arranged at two ends of the first header and are positioned outside the first header;
the second collecting pipe is communicated with the other end of the straight-through solar vacuum pipe to receive the medium flowing into the straight-through solar vacuum pipe or inject the medium into the straight-through solar vacuum pipe;
the second header is surrounded outside the second header to insulate the second header, two ends of the second header are respectively provided with a joint for water inlet and outlet, and the joints are positioned outside the second header;
a first seal member, wherein one end of the straight-through solar vacuum pipe is communicated with the first header through the first seal member; the other end of the straight-through solar vacuum pipe is also communicated with the second collecting pipe through the first sealing element.
Further, the first sealing element comprises a connecting joint which is in sealing fit with the first header or the second header and a sealing nut which is in sealing fit with a medium flow passage of the straight-through solar vacuum tube, the sealing nut can rotate on the medium flow passage, and the connecting joint is provided with threads which are matched with the sealing nut.
Further, the first header and the second header both comprise a shell, a first heat-insulating layer, a second heat-insulating layer and an end cover, the first header or the second header being enclosed in the second insulation layer, the second insulation layer being enclosed in the first insulation layer, the first heat preservation layer is arranged in the shell, the end covers are respectively arranged at the two ends of the shell, the end cover is provided with an opening for the first header or the second header to extend out, the opening of the end cover is connected with the extending end of the first header or the second header through a header dust ring, the solar vacuum pipe sealing device is characterized in that an opening for inserting the straight-through solar vacuum pipe is formed in the shell, the opening in the shell is connected with the straight-through solar vacuum pipe through a vacuum pipe dust ring, and a third heat insulation layer is surrounded on the outer side of the first sealing element.
Furthermore, the straight-through solar vacuum tube comprises a glass cover tube, a medium flow passage penetrating through the glass cover tube, a heat absorption film fixedly arranged on the medium flow passage, a fastener arranged between the glass cover tube and the medium flow passage to keep the medium flow passage and the glass cover tube in tight connection, a sealing element used for sealing and connecting the glass cover tube and the medium flow passage, and a getter fixedly arranged on the heat absorption film, wherein two ends of the medium flow passage are respectively communicated with the first sealing element.
Further, the connection joint comprises a joint body, a first notch formed in the joint body, a hollow cavity located in the axial direction of the joint body, threads arranged on the joint body and capable of being matched with the sealing nut, and an extrusion inclined portion arranged at the bottom of the joint body, wherein the first notch is communicated with the first header or the second header in a sealing mode, the hollow cavity is communicated between the first header or the second header and the medium flow passage, and the extrusion inclined portion abuts against the sealing nut.
Furthermore, a suction port for vacuumizing the glass cover tube is formed in the glass cover tube.
Further, the sealing nut comprises a nut body and a pressure-bearing inclined part arranged in the nut body, and the medium flow passage is lapped on the pressure-bearing inclined part.
Further, the first heat preservation layer is made of polyurethane materials so as to reduce heat loss of the heat collector.
Furthermore, the second heat preservation is glass silk cotton in order to be able to bear or endure high temperature and thermal-insulated.
Further, the first sealing gasket is arranged between the extrusion inclined part and the medium flow channel in a padded mode, the second sealing gasket is arranged between the pressure-bearing inclined part and the medium flow channel in a padded mode, and the first sealing gasket and the second sealing gasket are of funnel-shaped structures.
Compared with the prior art, the invention has the following advantages:
1. according to the straight-through pressure-bearing type vacuum tube heat collector, the glass cover tube and the medium flow channel made of copper are adopted, so that the medium flow channel has good stability in the actual application process, is not easy to break, and has fewer lost accessories in the assembly production process;
2. according to the straight-through pressure-bearing type vacuum tube heat collector, the straight-through solar vacuum tubes, the first collecting tube and the second collecting tube are hermetically communicated through the first sealing element, so that the communication among the plurality of straight-through solar vacuum tubes and the collecting tubes is realized, the discharge distance and the number of the straight-through solar vacuum tubes are convenient to adjust, in addition, the first collecting tube and the second collecting tube are communicated through the straight-through solar vacuum tubes, the resistance of media in the vacuum tubes and the collecting tubes is reduced, and the large-area serial-parallel connection of the straight-through solar vacuum tubes is facilitated;
3. according to the straight-through pressure-bearing type vacuum tube heat collector disclosed by the invention, the straight-through solar vacuum tube is adopted, a heat exchange medium can enter the flow channel for natural circulation heat exchange, and the heat exchange medium flows in a unidirectional manner, so that the resistance is small, the heat exchange is fast, the heat exchange efficiency of the vacuum tube is greatly improved, the vacuum tube heat collector is easy to empty, the system is not frozen, the top water is not easy to scale when being used, and the straight-through pressure-bearing type.
Drawings
FIG. 1 is a top view of a straight-through pressure-bearing evacuated tube collector according to an embodiment of the present invention;
FIG. 2 is a side view of a straight-through pressure-bearing evacuated tube collector in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a straight-through solar vacuum tube in an embodiment of the invention;
FIG. 4 is a schematic view of the construction of a first seal in an embodiment of the present invention;
FIG. 5 is a schematic view of the construction of a connection joint in an embodiment of the present invention;
FIG. 6 is a schematic structural view of a gland nut in an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a first gasket in an embodiment of the invention;
FIG. 8 is a schematic view of a fastener and seal configuration in an embodiment of the invention.
The drawings illustrate the following:
1-straight-through solar vacuum tube, 11-medium flow channel, 12-glass cover tube, 13-heat absorption film, 14-fastener, 141-fastening bolt, 142-fastening nut, 15-sealing element, 151-first sealing ring, 152-second sealing ring, 16-getter, 2-first header, 3-first header, 31-shell, 32-first heat preservation layer, 33-second heat preservation layer, 34-end cover, 4-second header, 5-second header, 6-first sealing element, 61-connecting joint, 611-joint body, 612-first notch, 613-hollow cavity, 614-extrusion inclined part, 62-sealing nut, 621-nut body, 622-pressure bearing inclined part, 63-third heat preservation layer, 7-a header dustproof ring, 8-a vacuum tube dustproof ring, 91-a first sealing gasket and 92-a second sealing gasket.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, it being understood that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.
Example 1
As shown in fig. 1-2, a straight-through pressure-bearing type evacuated tube collector comprises:
the straight-through solar vacuum tube 1 absorbs solar radiation, converts the solar radiation into heat energy and transmits the heat energy to a medium in the straight-through solar vacuum tube 1;
the first collecting pipe 2 is communicated with one end of the straight-through solar vacuum pipe 1 to receive the medium flowing into the straight-through solar vacuum pipe 1 or inject the medium into the straight-through solar vacuum pipe 1;
a first header 3 surrounding the first header 2 to keep the first header 2 warm, wherein both ends of the first header 2 are respectively provided with a joint for water inlet and outlet, and the joints are positioned outside the first header 3;
the second collecting pipe 4 is communicated with the other end of the straight-through solar vacuum pipe 1 to receive the medium flowing into the straight-through solar vacuum pipe 1 or inject the medium into the straight-through solar vacuum pipe 1;
a second header tank 5 surrounding the second header 4 to keep the second header 4 warm, wherein both ends of the second header 4 are respectively provided with a water inlet and outlet joint, and the joints are positioned outside the second header tank 5;
a first sealing member 6, wherein one end of the straight-through solar vacuum tube 1 is communicated with the first collecting tube 2 through the first sealing member 6; the other end of the straight-through solar vacuum tube 1 is also communicated with the second manifold 4 through the first sealing element 6.
As shown in fig. 4, the first sealing member 6 comprises a connecting joint 61 which is in sealing fit with the first header 2 or the second header 4 and a sealing nut 62 which is in sealing fit with the medium flow channel 11 of the straight-through solar vacuum tube 1, the sealing nut 62 can rotate on the medium flow channel 11, and the connecting joint 61 is provided with threads which are matched with the sealing nut 62.
The first header 3 and the second header 5 each include a shell 31, a first heat-insulating layer 32, a second heat-insulating layer 33, and an end cap 34, the first header 2 or the second header 4 is enclosed in the second heat-insulating layer 33, the second heat-insulating layer 33 is enclosed in the first heat-insulating layer 32, the first heat-insulating layer 32 is disposed inside the shell 31, the end caps 34 are respectively mounted at two ends of the shell 31, an opening through which the first header 2 or the second header 4 extends is formed in the end cap 34, an opening of the end cap 34 and an extending end of the first header 2 or the second header 4 are connected by a header dust ring 7, an opening through which the pass-through solar vacuum tube 1 is inserted is formed in the shell 31, and the opening in the shell 31 and the pass-through solar vacuum tube 1 are connected by a vacuum tube dust ring 8, the outer side of the first sealing member 6 is surrounded by a third insulation layer 63.
The collector dustproof ring 7 and the vacuum tube dustproof ring 8 are made of high-density silica gel.
The third heat preservation layer 63 is used for positioning and heat preservation of the first sealing element 6, and the third heat preservation layer 63 is made of rock wool heat preservation plates.
In this embodiment, the shell 31 and the end caps 34 at two ends thereof form a shell structure to protect the first header 2 or the second header 4 in the shell, the first heat-insulating layer 32 is made of a polyurethane material with good heat-insulating property and capable of effectively reducing heat loss of the heat collector, the second heat-insulating layer 33 is made of a glass fiber cotton cloth material with high temperature resistance and heat-insulating function, and the first heat-insulating layer 32 and the second heat-insulating layer 33 have a heat-insulating function and also have a function of fixing the first header 2 or the second header 4 and the straight-through solar vacuum tube 1.
The collector faces complex weather conditions in the actual application process, the collector is relatively closed through the collecting pipe dustproof ring 7 and the vacuum pipe dustproof ring 8, impurities such as sand, dust, rain and snow cannot easily enter the collector, and the service life of equipment is prolonged.
In order to facilitate the fixed installation of the straight-through pressure-bearing type evacuated tube collector, a fixing bolt is installed on the back surface (i.e. the side away from the light) of the shell 31.
As shown in fig. 3, the straight-through solar vacuum tube 1 includes a glass cover tube 12, a medium flow channel 11 penetrating through the glass cover tube 12, a heat absorbing film 13 fixedly mounted on the medium flow channel 11, a fastening member 14 mounted between the glass cover tube 12 and the medium flow channel 11 to hold the medium flow channel 11 and the glass cover tube 12 in tight connection, a sealing member 15 for sealing the glass cover tube 12 and the medium flow channel 11, and a getter 16 fixedly disposed on the heat absorbing film 13, wherein two ends of the medium flow channel 11 are respectively communicated with the first sealing member 6.
As shown in fig. 8, the fastening member 14 includes a fastening bolt 141 and a fastening nut 142 engaged with the fastening bolt 141, the fastening bolt 141 is provided with a through hole for the medium flow channel 11 to pass through, the glass cover tube 12 is provided with a through hole for the fastening bolt 141 to pass through, the sealing member includes a first sealing ring 151 and a second sealing ring 152, the first sealing ring 151 is disposed between the fastening nut 142 and the outer wall of the glass cover tube 12, the second sealing member 152 is disposed between the fastening bolt 141 and the inner wall of the glass cover tube 12, and both the first sealing ring 151 and the second sealing ring 152 are made of rubber. In order to ensure the sealing effect, the medium flow passage 11 and the through hole of the fastening bolt 141 are welded and sealed.
As shown in fig. 5, the connection joint 61 includes a joint body 611, a first notch 612 opened in the joint body 611, a hollow chamber 613 located in the axial direction of the joint body 611, a thread provided in the joint body 611 and capable of engaging with the packing nut 62, and a pressing inclined portion 614 provided at the bottom of the joint body 611, the first notch 612 is in sealed communication with the first header 2 or the second header 4, the hollow chamber 613 is in communication between the first header 2 or the second header 4 and the medium flow passage 11, and the pressing inclined portion 614 abuts against the packing nut 62.
The glass cover tube 12 is further provided with a suction port for vacuumizing the glass cover tube 12.
As shown in fig. 6, the gland nut 62 includes a nut body 621 and a pressure-bearing inclined portion 622 provided in the nut body 621, the medium flow path 11 is overlapped on the pressure-bearing inclined portion 622, and by rotating the gland nut 62, the pressing inclined portion 614 approaches the pressure-bearing inclined portion 622, and presses the medium flow path 11 therebetween to perform a sealing function.
In this embodiment, the slope of the pressing slope portion 614 and the slope of the bearing slope portion 622 are the same so that the two are better matched. The medium flow channel 11 has a flaring funnel structure between the extrusion inclined portion 614 and the pressure-bearing inclined portion 622, the inclination of the funnel structure is equal to the inclination of the extrusion inclined portion 614 and the pressure-bearing inclined portion 622, the medium flow channel 11 is made of copper metal, the copper metal has certain ductility, and when the extrusion inclined portion 614 and the pressure-bearing inclined portion 622 press the medium flow channel 11 therebetween, the medium flow channel 11 can generate a sealing effect. As an improvement, in order to further improve the sealing effect, a first sealing gasket 91 is arranged between the pressing inclined portion 614 and the medium flow passage 11, and a second sealing gasket 92 is arranged between the pressure-bearing inclined portion 622 and the medium flow passage 11, wherein, as shown in fig. 4 and 7, the first sealing gasket 91 and the second sealing gasket 92 are both in a funnel-shaped structure, and the first sealing gasket 91 and the second sealing gasket 92 are both made of rubber.
The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made within the scope of the present invention as claimed without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A straight-through pressure-bearing type vacuum tube heat collector is characterized by comprising:
the straight-through solar vacuum tube absorbs solar radiation, converts the solar radiation into heat energy and transmits the heat energy to a medium in the straight-through solar vacuum tube;
the first collecting pipe is communicated with one end of the straight-through solar vacuum pipe to receive the medium flowing into the straight-through solar vacuum pipe or inject the medium into the straight-through solar vacuum pipe;
the first header is surrounded outside the first header to insulate the first header, and joints for water inlet and outlet are respectively arranged at two ends of the first header and are positioned outside the first header;
the second collecting pipe is communicated with the other end of the straight-through solar vacuum pipe to receive the medium flowing into the straight-through solar vacuum pipe or inject the medium into the straight-through solar vacuum pipe;
the second header is surrounded outside the second header to insulate the second header, two ends of the second header are respectively provided with a joint for water inlet and outlet, and the joints are positioned outside the second header;
a first seal member, wherein one end of the straight-through solar vacuum pipe is communicated with the first header through the first seal member; the other end of the straight-through solar vacuum pipe is also communicated with the second collecting pipe through the first sealing element.
2. The straight through pressure bearing type vacuum tube heat collector according to claim 1, wherein the first sealing member comprises a connection fitting which is in sealing fit with the first header or the second header and a sealing nut which is in sealing fit with a medium flow passage of the straight through type solar vacuum tube, the sealing nut can rotate on the medium flow passage, and the connection fitting is provided with a thread which is matched with the sealing nut.
3. The straight-through pressure-bearing type vacuum tube heat collector according to claim 2, wherein the first header and the second header each comprise a shell, a first heat insulating layer, a second heat insulating layer and an end cap, the first header or the second header is enclosed in the second heat insulating layer, the second heat insulating layer is enclosed in the first heat insulating layer, the first heat insulating layer is arranged in the shell, the end caps are respectively arranged at two ends of the shell, an opening for the first header or the second header to extend out is arranged on each end cap, the opening of each end cap and the extending end of the first header or the second header are connected through a header dust ring, an opening for the straight-through type solar vacuum tube to be inserted into is arranged on the shell, and the vacuum tube on the shell is connected with the straight-through type solar vacuum tube through a vacuum tube dust ring, and a third insulating layer is surrounded on the outer side of the first sealing element.
4. The straight-through pressure-bearing type evacuated tube collector according to claim 3, wherein the straight-through type solar evacuated tube comprises a glass cover tube, a medium flow passage penetrating in the glass cover tube, a heat absorbing film fixedly mounted on the medium flow passage, a fastener mounted between the glass cover tube and the medium flow passage for keeping the medium flow passage and the glass cover tube tightly connected, a sealing member for sealing the glass cover tube and the medium flow passage, and a getter fixedly arranged on the heat absorbing film, wherein two ends of the medium flow passage are respectively communicated with the first sealing member.
5. The straight-through pressure-bearing type vacuum tube heat collector according to claim 4, wherein the connection joint comprises a joint body, a first notch formed on the joint body, a hollow cavity located in the axial direction of the joint body, a thread provided on the joint body and capable of being engaged with the sealing nut, and an extrusion slope portion provided at the bottom of the joint body, the first notch is in sealed communication with the first header or the second header, the hollow cavity is in communication between the first header or the second header and the medium flow passage, and the extrusion slope portion abuts against the sealing nut.
6. The straight-through pressure-bearing type vacuum tube heat collector according to claim 4, wherein the glass cover tube is further provided with a suction port for vacuumizing the glass cover tube.
7. The straight through pressure bearing type evacuated tube heat collector according to claim 5, wherein the packing nut comprises a nut body and a pressure bearing inclined portion provided in the nut body, and the medium flow passage is lapped on the pressure bearing inclined portion.
8. The straight-through pressure-bearing evacuated tube collector according to claim 3, wherein the first thermal insulation layer is made of polyurethane material to reduce the heat loss of the collector.
9. The straight-through pressure-bearing type evacuated tube collector according to claim 3, wherein the second insulating layer is made of glass fiber cotton cloth to resist high temperature and insulate heat.
10. The straight-through pressure-bearing evacuated tube collector according to claim 7, wherein a first sealing gasket is padded between the pressing inclined portion and the medium flow passage, and a second sealing gasket is padded between the pressure-bearing inclined portion and the medium flow passage, wherein the first sealing gasket and the second sealing gasket are both funnel-shaped structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060418.7A CN111156713A (en) | 2020-01-19 | 2020-01-19 | Straight-through pressure-bearing type vacuum tube heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060418.7A CN111156713A (en) | 2020-01-19 | 2020-01-19 | Straight-through pressure-bearing type vacuum tube heat collector |
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| Publication Number | Publication Date |
|---|---|
| CN111156713A true CN111156713A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010060418.7A Pending CN111156713A (en) | 2020-01-19 | 2020-01-19 | Straight-through pressure-bearing type vacuum tube heat collector |
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