CN111442548A

CN111442548A - Heat collection device for photo-thermal power generation

Info

Publication number: CN111442548A
Application number: CN202010409634.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing Huaxiangrong Information Technology Co ltd
Current assignee: Chongqing Huaxiangrong Information Technology Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-07-24

Abstract

The invention belongs to the technical field of photo-thermal power generation, and particularly discloses a heat collecting device for photo-thermal power generation, which comprises a heat collecting mechanism, a shielding mechanism and a P L C controller, wherein the shielding mechanism is used for shielding rain and snow by the heat collecting mechanism, and comprises a first rotating shaft, a second rotating shaft, a raindrop sensor, a first supporting unit and a second supporting unit, the first supporting unit is used for supporting the first rotating shaft, the second supporting unit is used for supporting the second rotating shaft, two ends of the first rotating shaft are provided with winding wheels, the second rotating shaft is wound with a piece of rain shielding cloth, the two winding wheels are respectively wound with ropes, the free end of each rope is connected with the free end of the rain shielding cloth, the first rotating shaft is connected with a first motor, the raindrop sensor is arranged on the second supporting unit, and the raindrop sensor and the first motor are electrically connected with the P L C controller.

Description

Heat collection device for photo-thermal power generation

Technical Field

The invention relates to the technical field of photo-thermal power generation, in particular to a heat collection device for photo-thermal power generation.

Background

The solar photo-thermal power generation is realized by collecting solar heat energy by utilizing a large-scale array parabolic or dish-shaped mirror surface, providing steam through a heat exchange device and combining the process of driving a motor by traditional turbo-generation. The solar photo-thermal power generation technology is adopted, so that an expensive silicon crystal photoelectric conversion process is avoided, and the cost of solar power generation can be greatly reduced; moreover, the solar energy utilization in the form has incomparable advantages compared with other forms of solar energy conversion, namely that water heated by solar energy can be stored in a huge container, and a turbine can still be driven to generate electricity for several hours after the sun lands, namely the time of energy conversion is prolonged, and the generating efficiency is improved. However, in the conventional photo-thermal power generation system, the heat collecting device is a core component of the whole photo-thermal power generation system, but the heat collecting device is exposed to the external environment to collect solar energy, so that rain and snow corrode each element of the heat collecting device in rainy and snowy weather, thereby shortening the service life of the heat collecting device.

Disclosure of Invention

The invention aims to provide a heat collecting device for photo-thermal power generation, which aims to solve the problem that the service life of the conventional heat collecting device for photo-thermal power generation is shortened due to the fact that the conventional heat collecting device is easily corroded by rain and snow in rainy and snowy weather.

In order to achieve the purpose, the invention provides a heat collecting device for photo-thermal power generation, which comprises a heat collecting mechanism for absorbing solar energy, a shielding mechanism for shielding rain and snow by the heat collecting mechanism, a base for supporting the heat collecting mechanism and a P L C controller, wherein the shielding mechanism comprises a first rotating shaft, a second rotating shaft, a raindrop sensor, a first supporting unit for supporting the first rotating shaft and a second supporting unit for supporting the second rotating shaft, the first supporting unit and the second supporting unit are arranged on the base and positioned on two sides of the heat collecting mechanism, two ends of the first rotating shaft are provided with winding wheels, a volute spring is sleeved on the second rotating shaft, one end of the volute spring is fixedly connected with the second rotating shaft, a rainshelter cloth is bonded on the other end of the volute spring, the rainshelter cloth is wound on the second rotating shaft, two winding wheels are respectively provided with a winding rope, the free end of each rope is connected with the free end of the rainshelter cloth, the first rotating shaft is connected with a first motor, the raindrop sensor is arranged on the second supporting unit, and the raindrop sensor and the P L C controller are electrically connected with the first motor.

The principle and the beneficial effects of the invention are that when a rain sensor monitors rain and snow, the P L C controller controls the first motor to rotate, the first motor rotates to drive the first rotating shaft to rotate, then the first rotating shaft drives the winding wheel to wind the rope, the rope pulls and unfolds the rain shielding cloth from the second rotating shaft while the winding wheel winds the rope, the volute spring deforms at the same time, and then the rain shielding cloth shields the upper part of the heat collecting mechanism, so that the purpose of shielding the rain and snow is realized, when weather is clear, the P L C controller controls the first motor to rotate in the reverse direction, the first motor rotates to drive the first rotating shaft to rotate, then the rain shielding cloth gradually winds on the second rotating shaft under the action of the volute spring deformation, and simultaneously the rope is unfolded from the first rotating shaft, so that the heat collecting mechanism is exposed to absorb solar energy under sunlight.

Scheme two, this is the preferred of basic scheme, first supporting element includes two first electric putter, second supporting element includes two second electric putter, two first electric putter and two second electric putter all with base fixed connection, the both ends of first pivot rotate with two first electric putter respectively and are connected, the both ends of second pivot rotate with two second electric putter respectively and are connected, first electric putter and second electric putter all with P L C controller electric connection.

When the weather is clear, the P L C controller controls and starts the first motor to reversely rotate at first, so that the rain shielding cloth is wound on the second rotating shaft under the action of deformation of the volute spring, then the P L C controller controls the first electric push rod and the second electric push rod to drive the first rotating shaft and the second rotating shaft to downwards move.

Scheme three, this is the preferred of scheme two, thermal-arrest mechanism includes first backup pad and second backup pad, the top of first backup pad is equipped with the bracing piece, the top fixedly connected with fused salt pipe of bracing piece, the equal fixedly connected with solar panel in top both sides of first backup pad, solar panel is symmetrical about the axis of fused salt pipe, the top fixed connection of second backup pad bottom and base, the top of second backup pad is connected with the bottom of first backup pad.

Preferably, in the third aspect, a distance between the first rotating shaft and the base is greater than a distance between the second rotating shaft and the base. Set up the distance between first pivot and the base and be greater than the distance between second pivot and the base, can make the waterproof cloth by the pulling expansion back, the top of waterproof cloth forms domaticly, and the waterproof cloth of being convenient for is when sheltering from sleet, and sleet can be followed and is slided fast on the waterproof cloth, and when the sleet was piled up on the top of avoiding the waterproof cloth, the pressure that the waterproof cloth bore was too big, leads to the junction disconnection of waterproof cloth and rope.

Scheme five, this is the preferred of scheme two to four, still including the angle adjustment mechanism who is used for adjusting the solar panel illumination angle, angle adjustment mechanism is including the solar energy tracker, lead screw, connecting rod, the second motor that are used for monitoring illumination intensity, the bottom of first backup pad is connected with the top of second backup pad is articulated, solar energy tracker is located on the solar panel, the bottom of lead screw is rotated with the top of base and is connected, the second motor is fixed on the base top, the output shaft of second motor and the top of lead screw are passed through belt transmission and are connected, threaded connection has the slider on the lead screw, the one end of connecting rod is connected with one side of first backup pad is articulated, the other end and the slider of connecting rod are articulated to be connected, second motor and solar energy tracker all with PIC controller electric connection.

When solar energy tracker monitors illumination intensity weak, the second motor of P L C controller control rotates, the motor drives the lead screw and rotates after that, it reciprocates to drive the slider when the lead screw rotates, when the slider reciprocates, the slider promotes first backup pad through the connecting rod and deflects along the hinged end of first backup pad and second backup pad, at the in-process of first backup pad deflection, if solar energy tracker monitors illumination intensity when strong, the second motor of P L C controller control is closed, thereby realize the regulation of solar panel angle, and then improve the effect that the fused salt pipe absorbed solar energy.

Scheme six, this is the preferred of scheme five, the bottom both sides of first backup pad all articulate and are connected with a plurality of telescopic link, every the free end of telescopic link all articulates with the second backup pad and is connected. The telescopic rod can ensure that the first supporting plate can keep stable when deflecting or standing still.

And a seventh scheme, which is preferable to the sixth scheme, wherein a mixture of sodium nitrate and potassium nitrate is filled in the molten salt pipe. The mixture of sodium nitrate and potassium nitrate is adopted to absorb solar energy, and the effect is better.

Drawings

FIG. 1 is a front view of a heat collecting device for photo-thermal power generation according to the present invention, in which a waterproof cloth covers a heat collecting mechanism;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a front view of a heat collecting device for photo-thermal power generation according to the present invention, wherein the heat collecting device is not covered by a waterproof cloth;

FIG. 4 is a left side view of a heat collecting device for photo-thermal power generation according to the present invention, wherein the heat collecting device is covered with a waterproof cloth;

FIG. 5 is a right side view of a heat collecting device for photo-thermal power generation according to the present invention, wherein the heat collecting device is covered with a waterproof cloth;

FIG. 6 is an enlarged view at B in FIG. 2;

FIG. 7 is a control flow chart of a shielding mechanism of a heat collecting device for photo-thermal power generation according to the present invention;

fig. 8 is a control flowchart of an angle adjusting mechanism of a heat collecting device for photo-thermal power generation according to the present invention.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the solar energy rain-proof device comprises a base 1, a first electric push rod 2, a winding wheel 3, a first rotating shaft 4, a rope 5, rain shielding cloth 6, a light gathering plate 7, a molten salt pipe 8, a supporting rod 9, a solar tracker 10, a first supporting plate 11, a telescopic rod 12, a second supporting plate 13, a connecting rod 14, a screw rod 15, a sliding block 16, a second motor 17, a second electric push rod 18, a first motor 19, a second rotating shaft 20, a volute spiral spring 21 and a raindrop sensor 22.

Example 1

As shown in figures 1-8, the heat collecting device for photo-thermal power generation comprises a heat collecting mechanism for absorbing solar energy, a shielding mechanism for shielding rain and snow by the heat collecting mechanism, a base 1 and a P L C controller, wherein the heat collecting mechanism comprises a first supporting plate 11 and a second supporting plate 13, the bottom end of the second supporting plate 13 is fixed at the top end of the base 1, the top end of the second supporting plate 13 is fixedly connected with the bottom end of the first supporting plate 11, a supporting rod 9 is vertically fixed at the top end of the first supporting plate 11, a molten salt pipe 8 is fixedly connected at the top end of the supporting rod 9, a mixture of sodium nitrate and potassium nitrate is filled in the molten salt pipe 8, light collecting plates 7 are fixedly connected to both sides of the top end of the first supporting plate 11, and the light collecting plates 7.

The shielding mechanism comprises a first rotating shaft 4, a second rotating shaft 20, a raindrop sensor 22, a first supporting unit for supporting the first rotating shaft 4 and a second supporting unit for supporting the second rotating shaft 20, the first supporting unit comprises two first electric push rods 2, the second supporting unit comprises two second electric rods, the two first electric push rods 2 and the two second electric push rods 18 are fixedly connected with the base 1, the two first electric push rods 2 are positioned on the right side of the first supporting plate 11, the two first electric push rods 2 are oppositely arranged, the two second electric push rods 18 are positioned on the left side of the first supporting plate 11, the two second electric push rods 18 are oppositely arranged, two ends of the first rotating shaft 4 are respectively and rotatably connected with the two first electric push rods 2 through bearings, two ends of the second rotating shaft 20 are respectively and rotatably connected with the two second electric push rods 18 through bearings, the distance between the first rotating shaft 4 and the base 1 is larger than the distance between the second rotating shaft 20 and the base 1, a spring 21 is sleeved on the second rotating shaft 20, one end of the spring 21 is fixedly connected with the second rotating shaft 20, the other end of the spring is fixedly connected with a second electric push rod 18, a rain drop sensor, the rain sensor is connected with a rain sensor 356, the rain drop sensor, the rain sensor is connected with a rain sensor 19, the rain sensor 365, the rain sensor is connected with a rain sensor, the rain sensor is connected with a rain sensor 366, the rain sensor is connected with a rain sensor, the rain sensor.

When the rain sensor 22 detects rain and snow, the P L C controller firstly controls to start the first electric push rod 2 and the second electric push rod 18, so that the first electric push rod 2 and the second electric push rod 18 push the first rotating shaft 4 and the second rotating shaft 20 to move upwards to default positions, then the P L C controller controls the first motor 19 to rotate, the first motor 19 rotates to drive the first rotating shaft 4 to rotate, then the first rotating shaft 4 drives the winding wheel 3 to wind the rope 5, while the winding wheel 3 winds the rope 5, the rope 5 pulls and unfolds the rain shielding cloth 6 from the second rotating shaft 20, meanwhile, the spiral spring 21 deforms, and then the rain shielding cloth 6 shields above the heat collecting mechanism, thereby achieving the purpose that the heat collecting mechanism shields rain and snow;

when the weather is clear, the P L C controller firstly controls the first motor 19 to rotate reversely, the first motor 19 rotates to drive the first rotating shaft 4 to rotate, then the rain shielding cloth 6 is gradually wound on the second rotating shaft 20 under the deformation effect of the spiral spring 21, meanwhile, the rope 5 is unfolded from the first rotating shaft 4, and then the P L C controller controls the first electric push rod 2 and the second electric push rod 18 to drive the first rotating shaft 4 and the second rotating shaft 20 to move downwards, so that the heat collecting mechanism is exposed under the sunlight to absorb the solar energy.

Example 2

As shown in fig. 1 to 5 and 8, example 2 differs from example 1 in that: the heat collecting device for photo-thermal power generation also comprises an angle adjusting mechanism for adjusting the illumination angle of a light collecting plate 7, wherein the connection mode of the bottom end of a first supporting plate 11 and the top end of a second supporting plate 13 is changed from fixed connection to hinged connection, the angle adjusting mechanism comprises a solar tracker 10 for monitoring illumination intensity, a screw rod 15, a connecting rod 14 and a second motor 17, the solar tracker 10 is fixedly arranged at the top end of the light collecting plate 7, the bottom end of the screw rod 15 is rotatably connected with the top end of a base 1 through a bearing, the second motor 17 is fixedly arranged at the top end of the base 1, belt wheels are fixedly arranged on an output shaft of the second motor 17 and the screw rod 15 and are in transmission connection through belts, a sliding block 16 is in threaded connection on the screw rod 15, one end of the connecting rod 14 is in hinged connection with the left side of the first supporting plate 11, the other end of the connecting rod 14 is in hinged connection with the sliding block 16, the free end of each telescopic rod 12 is hinged with the second support plate 13; the second motor 17 and the solar tracker 10 are both electrically connected with the PIC controller; solar tracker 10 is model Solys2, and solar tracker 10 is used to monitor changes in illumination intensity.

The embodiment of the embodiment 2 is that when the solar tracker 10 monitors that the intensity of light irradiating on the light-gathering plate 7 is weak, the P L C controller controls the second motor 17 to rotate, then the motor drives the screw rod 15 to rotate, the screw rod 15 drives the slider 16 to move up and down, when the slider 16 moves up and down, the slider 16 pushes the first support plate 11 to deflect along the hinged end of the first support plate 11 and the second support plate 13 through the connecting rod 14, and when the solar tracker 10 monitors that the intensity of light is strong during the deflection of the first support plate 11, the P L C controller controls the second motor 17 to close, so that the angle of the light-gathering plate 7 is adjusted, and the effect of the fused salt pipe 8 on absorbing solar energy is improved.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a heat collecting device for solar-thermal power generation, a serial communication port, including the thermal-arrest mechanism that is used for absorbing solar energy, be used for thermal-arrest mechanism to shelter from the mechanism of sleet, be used for supporting base and the P L C controller of thermal-arrest mechanism, shelter from the mechanism including first pivot, second pivot, raindrop sensor, be used for supporting the first supporting element of first pivot and be used for supporting the second supporting element of second pivot, first supporting element and second supporting element all locate on the base, and are located the both sides of thermal-arrest mechanism, the both ends of first pivot are equipped with the winding wheel, the cover is equipped with the scroll spring in the second pivot, the one end and the second pivot fixed connection of scroll spring, the other end of scroll spring bonds and has the cloth of hiding rain, wrap up the cloth winding in the second pivot, two it has the rope, every all to twine on the winding wheel the free end of rope all is connected with the free end of cloth, be connected with first motor in the first pivot, the raindrop sensor is located on the second supporting element, raindrop sensor and the equal P L electric connection of first motor.

2. The heat collecting device for solar-thermal power generation according to claim 1, wherein the first supporting unit includes two first electric push rods, the second supporting unit includes two second electric rods, the two first electric push rods and the two second electric push rods are both fixedly connected to the base, two ends of the first rotating shaft are respectively rotatably connected to the two first electric push rods, two ends of the second rotating shaft are respectively rotatably connected to the two second electric push rods, and the first electric push rods and the second electric push rods are both electrically connected to the P L C controller.

3. The heat collecting device for solar-thermal power generation according to claim 2, wherein the heat collecting mechanism comprises a first supporting plate and a second supporting plate, the top end of the first supporting plate is provided with a supporting rod, the top end of the supporting rod is fixedly connected with a molten salt pipe, both sides of the top end of the first supporting plate are fixedly connected with light collecting plates, the light collecting plates are symmetrical about the axis of the molten salt pipe, the bottom end of the second supporting plate is fixedly connected with the top end of the base, and the top end of the second supporting plate is connected with the bottom end of the first supporting plate.

4. A heat collecting device for solar-thermal power generation according to claim 3, wherein the distance between the first rotating shaft and the base is greater than the distance between the second rotating shaft and the base.

5. A heat collecting device for solar thermal power generation according to any one of claims 2 to 4, it is characterized by also comprising an angle adjusting mechanism for adjusting the illumination angle of the light collecting plate, wherein the angle adjusting mechanism comprises a solar tracker for monitoring the illumination intensity, a screw rod, a connecting rod and a second motor, the bottom end of the first supporting plate is hinged with the top end of the second supporting plate, the solar tracker is arranged on the light-gathering plate, the bottom end of the screw rod is rotationally connected with the top end of the base, the second motor is fixed at the top end of the base, the output shaft of the second motor is in transmission connection with the top end of the screw rod through a belt, the screw rod is in threaded connection with a slide block, one end of the connecting rod is hinged to one side of the first supporting plate, the other end of the connecting rod is hinged to the sliding block, and the second motor and the solar tracker are both electrically connected with the PIC controller.

6. The heat collecting device for solar-thermal power generation as claimed in claim 5, wherein a plurality of telescopic rods are hinged to both sides of the bottom end of the first supporting plate, and each of the telescopic rods has a free end hinged to the second supporting plate.

7. A heat collecting device for solar-thermal power generation according to claim 6, wherein the molten salt pipe is filled with a mixture of sodium nitrate and potassium nitrate.