CN216977213U

CN216977213U - Fixed light-focusing heat collector with adjustable focus

Info

Publication number: CN216977213U
Application number: CN202220394975.7U
Authority: CN
Inventors: 余雷; 李俊娇; 陆玉正; 王军
Original assignee: Nanjing Suoleyou Energy Saving Technology Co ltd
Current assignee: Nanjing Suoleyou Energy Saving Technology Co ltd
Priority date: 2022-02-26
Filing date: 2022-02-26
Publication date: 2022-07-15
Anticipated expiration: 2032-02-26

Abstract

The utility model discloses a fixed concentrating collector with an adjustable focus, which comprises a reflector, a slide bar mechanism, a receiver module, an adjustable reflector supporting module and a traction module, wherein the reflector is fixed on the fixed concentrating collector; the adjustable reflector supporting module is used for fixing the reflector and adjusting the radian of the reflector, the traction motor is connected with the receiver module through one traction rope, the other traction rope is connected with the adjustable reflector supporting module through a change gear, and the traction module drives the reflector to change the line shape and the focus while driving the receiver module to move. The device has the advantages that the reflector can be automatically adjusted in a fine mode, the condensation effect is good, the tracking precision requirement is low, the effective utilization rate of the unit occupied area is high, the stability of the device is high, and meanwhile the construction and maintenance cost is low.

Description

Fixed light-focusing heat collector with adjustable focus

Technical Field

The utility model relates to a solar heat collecting device, in particular to a fixed light-focusing heat collector with an adjustable focus, and belongs to the technical field of solar energy utilization.

Background

In order to convert solar energy into higher-grade heat energy, a working medium with higher temperature needs to be obtained through a light condensation mode, wherein the light condensation mode comprises a line focusing mode (groove type, linear Fresnel type) and a point focusing mode (tower type and disc type), and the line focusing mode is more popularized and applied due to low cost and wide application range.

The current line focusing method has the following defects: 1) the heat collecting device has higher construction cost and has no obvious advantages compared with the traditional and other energy sources; 2) the maintenance cost is high, firstly, the reflecting plate is exposed in the air for a long time, dust, fallen leaves and the like can influence the reflecting effect, the cleaning of the reflecting plate is troublesome, and meanwhile, the reflecting plate can be influenced by wind, rain, sand and dust, the reflecting rate is quickly attenuated, and the service life of the device is short; secondly, a large number of rotating parts exist, the structure is complex, and the failure rate is high. 3) The utilization rate of the solar energy on the ground per unit area is low, because the reflecting plates rotate, in order to avoid mutual shielding, a certain distance needs to be left between the reflecting plate arrays, and the utilization rates of the solar energy on the ground per unit area of the groove type heat collector and the linear Fresnel type heat collector are only about 55 percent and 65 percent. In addition, the trough type heat collector has the defects of heavy weight, high wind resistance, high tracking precision requirement and the like, and the linear Fresnel type heat collector has the defects of low light concentration ratio and the like.

To solve the above problems, a method of fixing the reflector and moving the receiver with the light is provided, the construction and maintenance costs of the heat collecting device are significantly reduced, and the utilization rate of the ground solar energy per unit area can reach up to 90%, which is referred to as "fixed reflection type line focusing heat collecting unit and fixed reflection type line focusing heat collecting device" (202110052075.4) "and" fixed reflector type light focusing heat collecting device using a rotating rod type receiver "(202110052076.9). However, when the sunlight incident angle deviates greatly, the focal spot formed by the sunlight is too large to affect the light condensing effect, and in some cases, the method is not suitable for being adopted, and if the light condensing effect is improved by rotating the light reflecting plate, the cost is increased, and the advantage of light condensing by the fixed light reflecting plate is lost.

Disclosure of Invention

The technical problem is as follows: the utility model aims to overcome the defects of the existing line focusing heat collecting device and provides a line focusing heat collecting device which is low in cost, good in light focusing effect and high in solar energy utilization rate, low in investment cost, high in unit area utilization rate and high in device stability, and has the advantages of light weight and low construction and maintenance cost.

The technical scheme is as follows: in order to solve the technical problem, the application provides a fixed spotlight heat collector of adjustable focus, including reflector panel, slide bar mechanism, receiver module, regulation formula reflector panel support module, traction module: the upper surface of the reflector is a reflecting surface which is a downward-concave arc surface, so that the reflecting surface forms a reflecting groove which extends along an axial direction, and the reflector is of a fixed structure; the slide bar mechanism consists of 2 arc-shaped support bars which are vertically arranged, and the 2 arc-shaped support bars are symmetrically distributed on the east and west sides of the reflector; the receiver module comprises a movable support and a straight-through type vacuum heat collecting tube, wherein the movable support is movably arranged on the corresponding arc-shaped supporting rod, the straight-through type vacuum heat collecting tube is fixedly arranged on the movable support, and the receiver module can move up and down along the arc-shaped supporting rod under the pushing of external force; the adjustable reflector supporting module is positioned below the reflector and used for fixing the reflector and adjusting the radian of the reflector; every traction module includes traction motor, and this traction motor's output shaft is connected to the movable support through the haulage rope and adjusts the formula reflector panel and support the module on, when the sunlight incident angle changes, traction module adjusts the position of receiver module through the haulage rope, drives the linear of regulation formula reflector panel support module regulation reflector panel through the haulage rope simultaneously, realizes that the linear focus of reflector panel is on the position of receiver module.

1. The smaller the angle of the incident light deviating from the axis of the parabola is, the better the focusing effect after reflection is; 2. in the lighting time period, the change range of the south-north direction height angle (the east-west axial placement of the heat collector is the incident angle of the heat collector) of the sunlight in one year is about +/-40 degrees. This application has adopted the fixed mode of placing of reflector panel, receiver removal based on above-mentioned principle. However, in the morning and evening in winter and summer, the angle of the incident light deviating from the axis of the parabola is large, so that the light condensation effect is influenced, and the normal operation of the heat collection system is difficult. Through the parabola of contrast research focus each point on the receiver orbit, it is comparatively close to discover each parabola in the regional linear form of reflector panel, and a certain position through being close to the receiver on the reflector panel exerts a power, can realize that the focus of reflector panel parabola is close to the position of receiver as far as possible to improve and optimize spotlight effect, can all be suitable for under various circumstances with the reflector panel beam condensing unit of guaranteeing to decide.

According to the reflector supporting module, due to the design of the variable-speed wheel, the traction rope and the adjustable reflector supporting module, when the incident light angle changes, the receiver moves and fine-tunes the reflector at the same time, so that the parabolic focus of the reflector is located at the position of the receiver, and the light condensation effect is guaranteed; meanwhile, the reflector does not need to be rotated so as to have the advantage of a fixed reflector light-gathering mode; the reflector fine adjustment does not need an additional power device, and the reflector adjusting device is driven by the variable speed wheel and the traction rope, so that the reflector fine adjustment device is simple in structure, high in adjustment precision and wide in application range.

Furthermore, each arc-shaped supporting rod is provided with an arc-shaped outer side surface, a groove is arranged on each arc-shaped supporting rod, each groove is formed by radially and downwards sinking the outer side surface, each groove extends along the extending direction of each arc-shaped supporting rod, and each groove is used for the traction rope to walk. The design of the upper groove of the arc-shaped supporting rod is convenient for the haulage rope to drive the receiver module to move smoothly on the track through the rolling connection device, a rotating rod structure and rotating mechanical equipment are omitted, and the device is simple in structure, light in weight and low in cost.

Furthermore, the adjustable reflector supporting module comprises a reflector bottom fixing rod, a reflector end fixing rod, a reflector supporting cross rod, an adjusting screw rod, an adjusting nut, an adjusting module cross rod, an adjusting module vertical rod, a buffer spring and a reflector supporting vertical rod; the fixing rods at the bottom of the light reflecting plates are in a strip shape, and the fixing rods at the bottom of the plurality of light reflecting plates are fixedly connected to the line shapes below the light reflecting plates for fixing the light reflecting plates; the fixed rods at the end parts of the reflecting plates are c-shaped long rods and are clamped at the two ends of the reflecting plates; the bottom of the fixed rod at the bottom of one reflecting plate is fixedly connected with the buffer spring, and the bottoms of the fixed rods at the bottom of the other reflecting plates and the bottoms of the fixed rods at the end parts of the two reflecting plates are fixedly connected with the adjusting screw; the reflector panel supports the horizontal pole and supports the montant through the reflector panel and fix subaerial, the reflector panel is supported and is equipped with a plurality of preformed holes on the horizontal pole, adjusting screw passes the preformed hole, the cover has 2 adjusting nut who is located reflector panel support horizontal pole top and below respectively on the adjusting screw, buffer spring lower extreme fixed connection is to the upper end of adjusting module montant, the adjusting module montant passes the preformed hole on the reflector panel support horizontal pole, the lower extreme of adjusting module montant is connected to the adjusting module horizontal pole, the tip and the haulage rope of adjusting module horizontal pole are connected.

Furthermore, the traction module also comprises a turning wheel and a variable speed wheel; the variable-speed wheel comprises a large-diameter wheel, a small-diameter wheel and a variable-speed wheel cross rod, and the variable-speed wheel cross rod penetrates through the axle centers of the large-diameter wheel and the small-diameter wheel and is fixedly connected with the large-diameter wheel and the small-diameter wheel; the traction motor is connected with a traction rope, the traction rope is connected to the movable support through the large-diameter wheel and the turning wheel, and the other traction rope is connected to the adjusting module cross rod through the small-diameter wheel and the turning wheel.

Firstly, the height, the radian and the angle of the reflector can be finely adjusted within a certain range by using the adjusting mechanism so as to enable the reflector to reach a set state in the area; driving the cross rod of the adjusting module to move up and down through a traction rope to realize fine adjustment of the linearity of the reflector; the linear change of the reflector is consistent with the designed linear change through the selection of the variable-speed wheel and the design of the buffer spring; and fourthly, the support adjusting structure is simple, the cost is low, the adjustment is easy to operate, and the stability is good.

Furthermore, the receiver module also comprises a CPC reflector plate which is fixed on the receiver fixing frame and positioned at the upper side of the straight-through type vacuum heat collecting tube, one part of sunlight reflected by the reflector plate directly irradiates on the straight-through type vacuum heat collecting tube, and the other part of sunlight is reflected by the CPC reflector plate and then irradiates on the straight-through type vacuum heat collecting tube.

The CPC reflector plate can further improve the light condensation ratio of the heat collecting device and reduce the requirement on tracking precision.

Furthermore, the reflecting plate adopts a flexible reflecting mirror or a reflecting aluminum plate.

Further, the radial section of the reflecting surface of the reflector is a part of a parabola, and the reflecting surface of the reflector is asymmetric relative to the symmetry axis of the parabola.

Furthermore, the fixing rod at the bottom of the reflector is connected with the reflector in an adhesive or magnetic adsorption manner.

This application still has and decides whole advantages of reflector panel spotlight mode: the number of rotating parts is small, the requirement on tracking precision is low, and the investment cost of rotating equipment and control equipment can be reduced; the solar energy utilization rate of the unit occupied area is high (can reach 95 percent), the light condensing spots are small, and the solar energy can be fully utilized; the wind resistance and the stability of the device are good, the weight is light, and the device has the advantages of low construction and maintenance cost.

Drawings

Fig. 1 is a schematic structural view of a fixed concentrating collector with adjustable focus.

Fig. 2 is a schematic structural view of the slide bar mechanism.

Fig. 3 is a schematic structural diagram of an adjustable reflector support module.

Fig. 4 is a schematic view of the structure of the traction device.

Fig. 5 is a schematic diagram of a receiver module.

FIG. 6 is a schematic structural view of the transmission wheel.

Fig. 7 is a design auxiliary view of a fixed concentrating collector with adjustable focus.

Wherein: 1 is a reflector, 2 is a sliding rod mechanism, 3 is an adjustable reflector supporting module, 4 is a traction device, 5 is a receiver module, 21 is an arc-shaped supporting rod, 22 is a groove, 23 is a connecting cross rod, 31 is a reflector bottom fixing rod, 32 is a reflector end fixing rod, 33 is a reflector supporting cross rod, 34 is an adjusting screw rod, 35 is an adjusting nut, 36 is an adjusting module cross rod, 37 is an adjusting module vertical rod, 38 is a buffer spring, 39 is a reflector supporting vertical rod, 41 is a traction motor, 42 is a traction rope, 43 is a turning wheel, 44 is a change wheel, 441 is a large-diameter wheel, 442 is a small-diameter wheel, 443 is a change wheel cross rod, 51 is a straight-through type vacuum heat collecting tube, 52 is a CPC reflector, 53 is a movable bracket, 61 is a reflector parabola intercepting section, 62 is a receiver track circle, 63 is parabola a, 64 is parabola b, 65 is parabola c, 66 is parabola a focus of parabola a focus, a focus of parabola a focus of a, a focus of a receiver module, a module, 67 is the parabolic b focus and 68 is the parabolic c focus.

Detailed Description

Please refer to fig. 1-6.

The fixed concentrating collector with adjustable focus comprises:

the reflecting plate 1 is characterized in that the upper surface of the reflecting plate 1 is a reflecting surface, the reflecting surface is a downward-concave arc-shaped surface, so that the reflecting surface forms a reflecting groove, the reflecting groove extends along an axial direction, the reflecting plate 1 is of a fixed structure, the reflecting plate 1 adopts a reflecting aluminum plate, the radial section of the reflecting surface of the reflecting plate 1 is a part of a parabola and is asymmetric relative to the symmetry axis of the parabola.

Slide bar mechanism 2, slide bar mechanism 2 comprises 2 arc bracing pieces 21 that are vertical setting, and 2 arc bracing pieces 21 symmetric distribution are in the east and west both sides of reflector panel 1.

The receiver module 5 comprises a movable bracket 53 and a straight-through type vacuum heat collecting tube 51, wherein the movable bracket 53 is movably arranged on the corresponding arc-shaped support rod 21, and the straight-through type vacuum heat collecting tube 51 is fixedly arranged on the movable bracket 53; under the pushing of external force, the receiver module 5 can move up and down along the arc-shaped support rod 21; a part of sunlight reflected by the reflector 1 directly irradiates the straight-through vacuum heat collecting tube 51, and a part of sunlight irradiates the straight-through vacuum heat collecting tube 51 after being reflected by the CPC reflector 52. The straight-through vacuum heat collecting tube 51 is 2m in length, and a metal tube in the straight-through vacuum heat collecting tube 51 is a DN16 stainless steel tube (the outer diameter is 22 mm).

And the adjustable reflector supporting module 3 is positioned below the reflector 1 and used for fixing the reflector 1 and adjusting the radian of the reflector 1.

Traction modules 4, each traction module 4 comprising a traction motor 41, the output shaft of the traction motor 41 being connected to the movable support 53 and the adjustable reflector support module 3 via a traction rope 42. When the incident angle of sunlight changes, the traction module 4 adjusts the position of the receiver module 5 through the traction rope 42, and simultaneously drives the adjustable reflector supporting module 3 to adjust the linear shape of the reflector 1 through the traction rope 42, so that the linear focus of the reflector 1 is realized on the position of the receiver module 5.

Each arc-shaped support rod 21 is provided with an arc-shaped outer side surface, a groove 22 is arranged on the arc-shaped support rod 21, the groove 22 is formed by radially sinking the outer side surface, the groove 22 extends along the extending direction of the arc-shaped support rod 21, and the groove 22 is used for the traction rope 42 to walk; the 2 arc-shaped support rods 21 are connected through a connecting cross rod 23.

The adjustable reflector supporting module 3 comprises a reflector bottom fixing rod 31, a reflector end fixing rod 32, a reflector supporting cross rod 33, an adjusting screw 34, an adjusting nut 35, an adjusting module cross rod 36, an adjusting module vertical rod 37, a buffer spring 38 and a reflector supporting vertical rod 39; the reflector bottom fixing rods 31 are long strips, and the plurality of reflector bottom fixing rods 31 are fixedly connected to the lower part of the reflector 1 and used for fixing the line shape of the reflector 1; the reflector end fixing rod 32 is a c-shaped long rod, and the reflector end fixing rod 32 is clamped at two ends of the reflector 1; the bottom of the fixing rod 31 at the bottom of one reflecting plate is fixedly connected with the buffer spring 38, the bottoms of the fixing rods 31 at the bottom of the other reflecting plates and the bottoms of the fixing rods 32 at the end parts of the two reflecting plates are fixedly connected with the adjusting screw rod 34, and the fixing rod 31 at the bottom of the reflecting plate is connected with the reflecting plate 1 in a magnetic adsorption manner; the reflector panel supports horizontal pole 33 and supports montant 39 through the reflector panel and fix subaerial, the reflector panel is equipped with a plurality of preformed holes on supporting horizontal pole 33, adjusting screw 34 passes the preformed hole, the cover has 2 adjusting nut 35 that are located reflector panel support horizontal pole 33 top and below respectively on the adjusting

screw

34, 38 lower extreme fixed connection of buffer spring is to the upper end of adjusting module montant 37, adjusting module montant 37 passes the preformed hole on the reflector panel support horizontal pole 33, the lower extreme of adjusting module montant 37 is connected to adjusting module horizontal pole 36, the tip and the haulage rope 42 of adjusting module horizontal pole 36 are connected.

The traction module 4 further comprises a direction-changing wheel 43 and a speed-changing wheel 44; the speed change wheel 44 comprises a large-diameter wheel 441, a small-diameter wheel 442 and a speed change wheel cross rod 443, wherein the speed change wheel cross rod 443 penetrates through the axle centers of the large-diameter wheel 441 and the small-diameter wheel 442 and is fixedly connected with the large-diameter wheel 441 and the small-diameter wheel 442; the traction motor 41 is connected with a traction rope 42, the traction rope 42 is connected to the movable support 53 through the large-diameter wheel 441 and the turning wheel 43, and the other traction rope 42 is connected to the adjusting module cross bar 36 through the small-diameter wheel 442 and the turning wheel 43.

Referring to fig. 7, the parabola a63, the parabola b64 and the parabola c65 are overlapped at two end points of the parabolic section 61 of the reflector, that is, two end points of the reflector 1; the focus of parabolic a focus 66, parabolic b focus 67, parabolic c focus 68 is on receiver trajectory circle 62; when the incident angle of the sunlight is 50 degrees, the reflector 1 adopts a curve of parabola a63, the reflected light is converged at the focus 66 of parabola a, when the incident angle of the sunlight is 60 degrees, the reflector 1 adopts a curve of parabola b64, the reflected light is converged at the focus 67 of parabola b, when the incident angle of the sunlight is 70 degrees, the reflector 1 adopts a curve of parabola c65, and the reflected light is converged at the focus 68 of parabola c. As can be seen from the enlarged view of fig. 5, the three parabolas have a small deviation from the shape of the parabola at the lower right side of the parabolic section 61 of the reflector, and when the receiver moves from the focus 66 of the parabola a to the focus 68 of the parabola c, the lower right side of the parabola of the reflector 1 needs to move upwards.

According to the principle shown in fig. 7, when the sunlight incident angle becomes large (for example, from 50 ° to 70 °), the traction motor 41 drives the receiver module 5 to slide through the traction rope 42, so that the receiver module 5 moves from the focus 66 of the parabola a to the focus 68 of the parabola c, the traction rope 42 drives the adjusting module cross bar 36 to move upwards through the gear wheel 44, the linearity of the reflector 1 is pushed to change, and the parabola a63 changes to the parabola c65, so that the sunlight is reflected by the reflector 1 and then focused on the receiver module 5.

The reflector can be automatically adjusted finely, the light condensation effect is good, and the solar energy utilization rate is high; the requirement on tracking precision is low, and the investment cost of mechanical equipment can be reduced; the effective utilization rate of the unit floor area is high; the wind resistance is good, the stability of the device is high, and the weight is light; meanwhile, the device has the advantage of low construction and maintenance cost.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which is defined by the claims.

Claims

1. Fixed spotlight heat collector of adjustable focus, its characterized in that, including reflector panel, slide bar mechanism, receiver module, regulation formula reflector panel support module, traction module: the upper surface of the reflector is a reflecting surface, the reflecting surface is an arc surface which is sunken downwards, so that a reflecting groove is formed on the reflecting surface, the reflecting groove extends along an axial direction, and the reflector is of a fixed structure; the slide bar mechanism consists of 2 arc-shaped support bars which are vertically arranged, and the 2 arc-shaped support bars are symmetrically distributed on the east and west sides of the reflector; the receiver module comprises a movable support and a straight-through type vacuum heat collecting tube, wherein the movable support is movably arranged on the corresponding arc-shaped supporting rod, the straight-through type vacuum heat collecting tube is fixedly arranged on the movable support, and the receiver module can move up and down along the arc-shaped supporting rod under the pushing of external force; the adjustable reflector supporting module is positioned below the reflector and used for fixing the reflector and adjusting the radian of the reflector; every traction module includes the traction motor, and this traction motor's output shaft is connected to the movable support and adjusts formula reflector panel support module through the haulage rope on, when the sunlight incident angle changes, the position of receiver module is adjusted through the haulage rope to the traction module, drives the linear focus of adjusting formula reflector panel support module regulation reflector panel through the haulage rope simultaneously, realizes that the linear focus of reflector panel is in the position of receiver module.

2. The fixed concentrating collector with adjustable focus according to claim 1, wherein each of the arc-shaped supporting rods has an arc-shaped outer side surface, a groove is formed on the arc-shaped supporting rod, the groove is formed by radially recessing the outer side surface, the groove extends along the extending direction of the arc-shaped supporting rod, and the groove is used for the walking of the traction rope; the 2 arc-shaped supporting rods are connected through a connecting cross rod.

3. The fixed concentrating collector with adjustable focus according to claim 1, wherein the adjustable reflector support module comprises a reflector bottom fixing rod, a reflector end fixing rod, a reflector support cross rod, an adjusting screw rod, an adjusting nut, an adjusting module cross rod, an adjusting module vertical rod, a buffer spring and a reflector support vertical rod; the fixing rods at the bottom of the light reflecting plates are in a strip shape, and the fixing rods at the bottom of the plurality of light reflecting plates are fixedly connected to the line shapes below the light reflecting plates for fixing the light reflecting plates; the fixed rods at the end parts of the reflecting plates are c-shaped long rods and are clamped at the two ends of the reflecting plates; the bottom of the fixed rod at the bottom of one reflecting plate is fixedly connected with the buffer spring, and the bottoms of the fixed rods at the bottom of the other reflecting plates and the bottoms of the fixed rods at the end parts of the two reflecting plates are fixedly connected with the adjusting screw; the reflector panel supports the horizontal pole and supports the montant through the reflector panel and fix subaerial, the reflector panel is supported and is equipped with a plurality of preformed holes on the horizontal pole, adjusting screw passes the preformed hole, the cover has 2 adjusting nut who is located reflector panel support horizontal pole top and below respectively on the adjusting screw, buffer spring lower extreme fixed connection is to the upper end of adjusting module montant, the adjusting module montant passes the preformed hole on the reflector panel support horizontal pole, the lower extreme of adjusting module montant is connected to the adjusting module horizontal pole, the tip and the haulage rope of adjusting module horizontal pole are connected.

4. The fixed concentrating collector with adjustable focus according to claim 1, wherein the traction module further comprises a direction-changing wheel and a speed-changing wheel; the variable-speed wheel comprises a large-diameter wheel, a small-diameter wheel and a variable-speed wheel cross rod, and the variable-speed wheel cross rod penetrates through the axle centers of the large-diameter wheel and the small-diameter wheel and is fixedly connected with the large-diameter wheel and the small-diameter wheel; the traction motor is connected with a traction rope, the traction rope is connected to the movable support through the large-diameter wheel and the turning wheel, and the other traction rope is connected to the adjusting module cross rod through the small-diameter wheel and the turning wheel.

5. The fixed type concentrating collector with adjustable focus according to claim 1, wherein the receiver module further comprises a CPC reflector fixed on the receiver fixing frame and located on the upper side of the straight-through evacuated collector tube, and a part of sunlight reflected by the reflector directly irradiates the straight-through evacuated collector tube and a part of sunlight reflected by the CPC reflector irradiates the straight-through evacuated collector tube.

6. The fixed concentrated heat collector with adjustable focus according to claim 1, wherein the reflecting plate is a flexible reflecting mirror or a reflecting aluminum plate.

7. The adjustable focus fixed concentrated heat collector of claim 1 wherein the reflector has a radial cross-section that is a portion of a parabola, and the reflector is asymmetric with respect to the axis of symmetry of the parabola.

8. The fixed concentrated light collector with adjustable focus of claim 3, wherein the fixing rod at the bottom of the reflector is connected to the reflector by means of adhesive or magnetic attraction.