Comprehensive heat collection system based on trough type solar heat collector and using method of comprehensive heat collection system

Abstract

The invention relates to a comprehensive heat collection system based on a groove type solar heat collector and a using method of the comprehensive heat collection system. A valve body is internally provided with a first limiting frame, a second limiting frame, an air storage pipe and a middle pipe, wherein the first limiting frame and the second limiting frame are arranged corresponding to a first outlet and a second outlet respectively, and the air storage pipe and the middle pipe are arranged between a first air bag and a second air bag. A first pressure valve for feeding air into the first air bag is arranged on the air storage pipe, a third pressure valve for feeding air into the air outlet valve is arranged on the air storage pipe, a second pressure valve is arranged on the middle pipe, and an air inlet and an air suction port are further formed in the air storage pipe. When the temperature of the heat exchange oil is relatively low, part of the heat exchange oil returns into the heat collector again to be heated, so that the part of the heat exchange oil is not subjected to heat exchange but is mixed with other heat exchange oil to be heated again, heat waste is reduced, at the moment, the temperature rise speed of the heat exchange oil is high after circulation, and after the heat exchange oil reaches a certain temperature, the heat exchange oil is heated again. Therefore, the requirement of the power generation heat exchange box on the temperature of the heat exchange oil is met, and the heat exchange of power generation is relatively quickly ensured.

Description

Technical Field

[0001] The present invention relates to the field of valves, in particular to the field of trough solar-related valve technology, and specifically refers to an integrated heat collection system based on a trough solar collector and a method of using the same. Background Art

[0002] Trough solar energy is a type of heat collection device that utilizes a photothermal conversion method. Through focusing, reflection, and absorption, it converts light energy into heat energy, allowing the heat exchange medium to reach a specific temperature to meet the needs of different loads. Trough collectors fall into the category of medium- and high-temperature collectors, capable of achieving relatively high temperatures for the heat exchange medium. They are used in various applications, including thermal power generation, seawater desalination, heating projects, and absorption refrigeration.

[0003] Due to its broad application prospects, solar energy is the primary energy source for trough collectors. Solar trough collectors play a dominant role in solar energy utilization systems, providing the heat source. Their efficiency and investment cost impact the efficiency and economic viability of the entire collection system. Trough solar collectors utilize a vacuum glass tube structure. Specifically, the inner tube is a metal tube coated with a highly absorptive, selectively absorbing coating. The heating medium flows inside the tube, while the outer tube is a glass tube. A vacuum is drawn between the glass and metal tubes to suppress convection and conduction heat loss.

[0004] The heat exchange pump pumps the heat exchange oil into the heat collecting tube. After being heated by the solar panels, it enters the generator heat exchange box for heat exchange, and then enters the water tank for heat exchange, easily realizing power generation and water heating. However, when the sunlight is weak, the temperature of the heat exchange oil is relatively low, and it cannot fully heat the water in the power generation heat exchange box when it enters the power generation heat exchange box. It also needs to pass through the water tank for heat exchange. After two heat exchanges, the temperature of the heat exchange oil drops significantly, especially when it is exchanged with the water tank. This part of the heat exchange oil returns to the oil tank, which seriously affects power generation and heat exchange. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a comprehensive heat collection system based on a trough-type solar collector. When the temperature of the heat exchange oil is relatively low, this portion of the heat exchange oil is returned to the collector for heating, so that this portion of the heat exchange oil does not undergo heat exchange, but is mixed with other heat exchange oils and heated again, thereby reducing heat waste. At this time, the heat exchange oil heats up quickly after circulation. After reaching a certain temperature, the heat exchange oil is heat exchanged again, thereby meeting the heat exchange oil temperature requirements of the power generation heat exchange box, thereby ensuring relatively fast heat exchange for power generation.

[0006] The present invention is achieved through the following technical solutions: a comprehensive heat collection system based on a trough solar collector, including a trough solar energy and a discharge heat exchange box, and also including a conduction valve located between the trough solar energy and the discharge heat exchange box. The conduction valve includes a valve body, an inlet connected to the oil outlet of the trough solar energy collector pipe, and a first outlet and a second outlet that are arranged oppositely and connected to the power generation heat exchange box and the oil inlet of the collector pipe respectively. The valve body is provided with a first limit frame and a second limit frame that are respectively arranged corresponding to the first outlet and the second outlet, and the first limit frame and the second limit frame are provided with There are a first airbag and a second airbag, an air storage pipe and an intermediate pipe between the first airbag and the second airbag, a first pressure valve for supplying air to the first airbag is provided on the connecting port between the air storage pipe and the first airbag, a third pressure valve for supplying air to the air outlet valve is provided on the connecting port between the air storage pipe and the second airbag, a second pressure valve for supplying air to the intermediate pipe is provided on the connecting port between the intermediate pipe and the first airbag, the other end of the intermediate pipe is connected to the second airbag, the contact area between the first limit frame and the heat exchange oil is greater than the contact area between the second limit frame and the heat exchange oil, and an air inlet and an air intake are also provided on the air storage pipe. When the present invention is in use, when the temperature of the heat exchange oil is relatively low, this part of the heat exchange oil is returned to the collector for heating, so that this part of the heat exchange oil does not undergo heat exchange, but is mixed with other heat exchange oils and heated again, thereby reducing heat waste. At this time, the heat exchange oil heats up quickly after circulation. After reaching a certain temperature, the heat exchange oil is heat exchanged again, thereby meeting the power generation heat exchange box's requirements for the heat exchange oil temperature, thereby ensuring relatively fast heat exchange for power generation.

[0007] Preferably, the corners between the inner side surface of the first airbag and the four side edges are arc-shaped extending from the inside to the outside.

[0008] This preferred solution reduces the thickness at the corners through the arc-shaped setting, and the arc-shaped setting also plays a guiding role.

[0009] Preferably, the first side wall of the first limit frame is slidably connected to the valve body in the transverse direction, and a first spring is provided in the valve body to drive the first side wall to move toward the first airbag. The second limit frame is provided with a through hole that transversely passes through the side wall of the second limit frame. After the second airbag is inflated, it extends into the through hole. A plug rod that extends transversely and is arranged corresponding to the side wall is also slidably connected in the through hole. A second spring that drives the plug rod to move toward the second airbag is provided on the valve body. The plug rod and the first side wall are connected by a connecting structure. The movement of the plug rod drives the movement of the first side wall. A limiting structure is also provided in the through hole to limit the plug rod from sliding toward the second airbag.

[0010] In this preferred solution, when in use, the stopper rod is limited in movement by the limiting structure. When the first airbag is inflated, the stopper rod cannot move, thereby limiting the movement of the first side wall, thereby ensuring the sealing between the first airbag and the first limiting frame. The expansion of the second airbag releases the restraint of the limit structure on the plug rod, thereby also driving the plug rod to move, and driving the first side wall to move through the connecting structure, thereby forming a larger gap between the first airbag and the first side wall, thereby facilitating the heat exchange oil to flow out of the first outlet after reaching a certain temperature.

[0011] Preferably, the connecting structure includes a first rack located between the first spring and the first side wall, a gear set located between the first rack and the plug rod and meshing with the first rack, one gear of the gear set meshing with an intermediate rack extending toward the plug rod, a second rack fixed to the plug rod, and the second rack meshing with a gear meshing with the intermediate rack.

[0012] This preferred solution realizes the same-direction movement of the plug rod and the first rack through the arrangement of the first rack, the gear set, the second rack, and the gear.

[0013] Preferably, the limiting structure includes a limiting groove located at the upper end of the perforation, a limiting block is provided in the limiting groove, and a limiting plate is provided on the limiting block, which extends into the perforation and is inserted into the plug rod. The perforation is connected to the limiting groove through a limiting channel, and the limiting perforation is located between the second airbag and the limiting plate.

[0014] When this preferred solution is in use, after the second airbag is expanded, a part of it enters the limiting groove through the limiting channel, thereby supporting the limiting block and the limiting plate, thereby releasing the constraint of the limiting plate on the plug rod, and realizing the movement of the plug rod.

[0015] Preferably, a temperature sensor and a pressure sensor are provided in the valve body, which makes it easier for the staff to understand the temperature and pressure conditions in the valve body.

[0016] Preferably, the heating oil passes through the power generation heat exchange box and then enters the water heater to exchange heat with water. The arrangement of this preferred solution facilitates heating of water.

[0017] Preferably, the distance between the second airbag side wall and the second limiting frame is smaller than the distance between the first airbag and the first limiting frame.

[0018] This preferred solution facilitates the rapid matching of the second airbag and the second limiting frame by setting the spacing.

[0019] A method for using a comprehensive heat collection system based on a trough solar collector comprises the following steps: When sunlight is weak, the temperature of the heat exchange oil entering the trough solar energy storage tank is too low to reach the temperature of the water in the evaporating electric heat exchange box. In order to make the heat exchange oil reach the required temperature as quickly as possible, this part of the heat exchange oil needs to be returned to the trough solar energy storage tank for reheating. After the heat exchange oil is initially heated and enters the valve body, the temperature of the heat exchange oil causes the air in the air storage pipe to expand. After the air expands, it flows into the first airbag along the first pressure valve. The first airbag expands and cooperates with the first limit frame to block the first outlet. The heat exchange oil can only flow back through the second outlet. When the heat exchange oil is heated to a certain temperature and stabilizes, the air in the first airbag and the air storage pipe continues to expand, so the air enters the intermediate tube and the second airbag along the second pressure valve. The second airbag expands and cooperates with the second limiting frame to block the second outlet. At this time, the heat exchange oil continues to enter the valve body, and the pressure in the valve body increases. Since the contact area between the first airbag and the heat exchange oil is large, the thickness of the airbag at the arc corner is small, and under the guidance of the arc corner, the heat exchange oil will break through the first airbag and the first limiting frame and flow into the power generation heat exchange box from the first outlet. At the same time, the flowing heat exchange oil also squeezes the first airbag, compressing the first airbag, and the air in the first airbag enters the intermediate tube and the second airbag through the second pressure valve, thereby further enhancing the sealing strength between the second airbag and the second limiting frame, thereby realizing that the high-temperature heat exchange oil enters the power generation heat exchange box from the first outlet; When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first airbag and the second airbag cools and contracts. Part of the heat exchange oil will be reheated from the second outlet to ensure the temperature of the subsequent heat exchange oil. When the temperature of the heat exchange oil continues to drop, the heat exchange oil is stopped from entering the heat collecting pipe. When it drops to a certain temperature, the air pump is driven to suck away the air in the first airbag, the middle pipe, the second airbag and the air storage pipe through the air intake port, and then the air is replenished into the air storage pipe through the air inlet.

[0020] A method for using a comprehensive heat collection system based on a trough solar thermal collector, comprising the following steps: when sunlight is weak, the heating temperature of the heat exchange oil entering the trough solar thermal collector is low and cannot reach the temperature of the water in the evaporation electric heat exchange box. In order to make the heat exchange oil reach the required temperature as soon as possible, this part of the heat exchange oil needs to be returned to the trough solar thermal collector for reheating. After the heat exchange oil is initially heated and enters the valve body, the temperature of the heat exchange oil causes the air in the air storage pipe to expand. After the air expands, it enters the first airbag along the first pressure valve. The first airbag expands and cooperates with the first limit frame to block the first outlet. The heat exchange oil can only flow back from the second outlet. At this time, the first airbag drives the middle rack to move downward through the first rack and gear set, and the middle rack drives the plug rod to move in the direction away from the second airbag through the gear. Since the second airbag has not expanded at this time, it is restricted by the limit plate and the plug rod cannot move inward, so the first side wall cannot move at this time. When the heat exchange oil is heated to a certain temperature and stabilizes, the air in the first airbag and the air storage pipe continues to expand, so the air flows along the second pressure valve into the intermediate tube and the second airbag. The second airbag expands and cooperates with the second limit frame to block the second outlet. At this time, part of the second airbag enters the perforation and enters the limit groove through the limit channel, causing the limit block to move upward, thereby causing the limit plate to move upward, releasing the restraint of the plug rod. Due to the expansion of the first airbag at this time, the plug rod tends to compress the second spring. Therefore, at this time, the plug rod moves in the direction of the second spring under the drive of the middle rack. As a result, the second spring is compressed. At this time, the first side wall moves a certain distance toward the spring driven by the first airbag, and part of the heat exchange oil enters the first outlet. At the same time, the plug rod continues to compress the second spring in the second airbag. The movement of the plug rod drives the middle rack upward through the gear. The middle rack drives the first rack to compress the first spring through the gear set, so that the first side wall continues to move toward the first spring, thereby forming a larger gap between the first side wall and the first airbag, and the heat exchange oil enters the first outlet through the gap; thus, the high-temperature heat exchange oil enters the power generation heat exchange box from the first outlet; When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first airbag and the second airbag cools and contracts. Driven by the first spring and the second spring, the first side wall and the plug rod are reset, and the heat exchange oil stops entering the heat collecting tube. When the temperature drops to a certain level, the air pump is driven to suck away the air in the first airbag, the middle tube, the second airbag and the air storage tube through the air intake port, and then the air is replenished into the air storage tube through the air intake port. The beneficial effects of the present invention are as follows: when the temperature of the heat exchange oil is relatively low, this part of the heat exchange oil is returned to the collector for heating, so that this part of the heat exchange oil does not undergo heat exchange, but is mixed with other heat exchange oil and heated again, thereby reducing heat waste. At this time, the heat exchange oil heats up quickly after circulation. After reaching a certain temperature, the heat exchange oil is heat exchanged again, thereby meeting the requirements of the power generation heat exchange box for the heat exchange oil temperature, thereby ensuring the heat exchange of power generation relatively quickly; the setting of limiting the movement of the plug rod by the limiting structure, when the first airbag expands, the movement of the first side wall is limited because the plug rod cannot move, thereby ensuring the sealing of the first airbag and the first limiting frame; the expansion of the second airbag releases the constraint of the limiting structure on the plug rod, thereby also driving the plug rod to move, and driving the first side wall to move through the connecting structure, thereby forming a larger gap between the first airbag and the first side wall, thereby facilitating the heat exchange oil to flow out from the first outlet after reaching a certain temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic top view of the valve body in Example 1; Figure 3This is a schematic diagram of Example 1 when the heat exchange oil temperature is low; Figure 4 This is a schematic diagram of Example 1 in which the first outlet and the second outlet are both blocked when the heat exchange oil temperature rises; Figure 5 This is a schematic diagram of heat exchange oil flowing out of the first outlet in Example 1; Figure 6 is a schematic diagram of the first piston facing outward from the valve body; Figure 7 2 is a schematic top view of the valve body in Example 2; Figure 8 This is a schematic front view of the limit block in Example 2; As shown in the figure: 1. Trough solar energy, 2. Valve body, 3. Power generation heat exchange box, 4. Water heater, 5. Inlet, 6. First outlet, 7. Second outlet, 8. First limit frame, 9. Second limit frame, 10. Gas storage pipe, 11. First pressure valve, 12. Second pressure valve, 13. Third pressure valve, 14. Intermediate pipe, 15. First side wall, 16. First rack, 17. First spring, 18. Gear set, 19. Intermediate rack, 20. Second spring, 21. Plug rod, 22. Limit block, 23. Second airbag, 24. First airbag. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0023] Example 1: Refer to the attached Figure 1-6 The present invention provides a comprehensive heat collection system based on a trough solar collector and a method for using the same. The conduction valve includes a valve body 2, an inlet 5 connected to the oil outlet of the trough solar collector pipe, and a first outlet 6 and a second outlet 7 arranged opposite to each other and connected to the power generation heat exchange box 3 and the oil inlet of the collector pipe, respectively. The valve body 2 is provided with a first limit frame 8 and a second limit frame 9 respectively corresponding to the first outlet 6 and the second outlet 7. The first limit frame 8 and the second limit frame 9 are provided with a first air bag 24 and a second air bag 23. The air storage pipe 10 and the air bag 24 and the second air bag 23 are provided between the first air bag 24 and the second air bag 23. The intermediate tube 14, the connecting port between the air storage tube 10 and the first air bag 24 is provided with a first pressure valve 11 for supplying air to the first air bag 24, the connecting port between the air storage tube 10 and the second air bag 23 is provided with a third pressure valve 13 for supplying air to the air outlet valve, the connecting port between the intermediate tube 14 and the first air bag 24 is provided with a second pressure valve 12 for supplying air to the intermediate tube 14, the other end of the intermediate tube 14 is connected to the second air bag 23, the contact area between the first limit frame 8 and the heat exchange oil is greater than the contact area between the second limit frame 9 and the heat exchange oil, and the air storage tube 10 is also provided with an air inlet and an air intake. The corners between the inner side surface and the four side edges of the first airbag 24 are arc-shaped extending from the inside to the outside.

[0024] The heating oil passes through the power generation heat exchange box 3 and enters the water heater 4 to exchange heat with water.

[0025] The valve body 2 is provided with a temperature sensor and a pressure sensor. A method for using a comprehensive heat collection system based on a trough solar collector comprises the following steps: When sunlight is weak, the temperature of the heat exchange oil entering the trough solar energy storage device is low and cannot reach the temperature of the water in the evaporating electric heat exchange box 3. In order to make the heat exchange oil reach the required temperature as quickly as possible, this part of the heat exchange oil needs to be returned to the trough solar energy storage device for reheating. After the heat exchange oil is initially heated and enters the valve body 2, the temperature of the heat exchange oil causes the air in the air storage pipe 10 to expand. After the air expands, it flows into the first air bag 24 along the first pressure valve 11. The first air bag 24 expands and cooperates with the first limit frame 8 to block the first outlet 6. The heat exchange oil can only flow back through the second outlet 7. When the heat exchange oil is heated to a certain temperature and stabilizes, the air in the first airbag 24 and the air storage pipe 10 continues to expand. Therefore, the air flows along the second pressure valve 12 into the intermediate tube 14 and the second airbag 23. The second airbag 23 expands and cooperates with the second limiting frame 9 to block the second outlet 7. At this time, the heat exchange oil continues to flow into the valve body 2, and the pressure in the valve body 2 increases. Since the contact area between the first airbag 24 and the heat exchange oil is large and the thickness of the airbag at the arc corner is small, under the guidance of the arc corner, the heat exchange oil will break through the first airbag 24 and the first limiting frame 8 and flow into the power generation heat exchange box 3 from the first outlet 6. At the same time, the flowing heat exchange oil also squeezes the first airbag 24, compressing it. The air in the first airbag 24 then flows through the second pressure valve 12 into the intermediate tube 14 and the second airbag 23, thereby further strengthening the sealing strength between the second airbag 23 and the second limiting frame 9, so that the high-temperature heat exchange oil can enter the power generation heat exchange box 3 from the first outlet 6. When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first air bag 24 and the second air bag 23 cools and contracts. Part of the heat exchange oil will be reheated from the second outlet 7 to ensure the temperature of the subsequent heat exchange oil. When the temperature of the heat exchange oil continues to drop, the heat exchange oil is stopped from entering the heat collecting pipe. When it drops to a certain temperature, the air pump is driven to suck away the air in the first air bag 24, the middle pipe 14, the second air bag 23 and the air storage pipe 10 through the air intake port, and then the air is replenished into the air storage pipe 10 through the air inlet.

[0026] Example 2: Refer to the attached Figure 1 , and attached Figure 6-8, a comprehensive heat collection system based on a trough solar collector and its use method, the conduction valve includes a valve body 2, an inlet 5 connected to the oil outlet of the trough solar collector pipe, and a first outlet 6 and a second outlet 7 arranged oppositely and connected to the power generation heat exchange box 3 and the oil inlet of the collector pipe respectively, the valve body 2 is provided with a first limit frame 8 and a second limit frame 9 respectively corresponding to the first outlet 6 and the second outlet 7, the first limit frame 8 and the second limit frame 9 are provided with a first air bag 24 and a second air bag 23, the air storage pipe 10 and the middle air bag between the first air bag 24 and the second air bag 23 The intermediate pipe 14, the connecting port between the air storage pipe 10 and the first air bag 24 is provided with a first pressure valve 11 for supplying air to the first air bag 24, the connecting port between the air storage pipe 10 and the second air bag 23 is provided with a third pressure valve 13 for supplying air to the outlet valve, the connecting port between the intermediate pipe 14 and the first air bag 24 is provided with a second pressure valve 12 for supplying air to the intermediate pipe 14, the other end of the intermediate pipe 14 is connected to the second air bag 23, the contact area between the first limit frame 8 and the heat exchange oil is greater than the contact area between the second limit frame 9 and the heat exchange oil, and the air storage pipe 10 is also provided with an air inlet and an air intake. The corners between the inner surface of the first airbag 24 and the four side edges are arc-shaped extending from the inside to the outside, and the arc is extended and closed along the circumferential direction, that is, the four side edges of the inner surface of the first airbag 24 are processed with arc-shaped chamfers.

[0027] The first side wall 15 of the first limit frame 8 is slidably connected to the valve body 2 in the transverse direction. The valve body 2 is provided with a first spring 17 that drives the first side wall 15 to move toward the first airbag 24. The second limit frame 9 is provided with a through hole that transversely penetrates the side wall of the second limit frame 9. The second airbag 23 extends into the through hole after expansion. A plug rod 21 that extends transversely and is arranged corresponding to the side wall is also slidably connected in the through hole. The valve body 2 is provided with a second spring 20 that drives the plug rod 21 to move toward the second airbag 23. The plug rod 21 and the first side wall 15 are connected by a connecting structure. The movement of the plug rod 21 drives the first side wall 15 to move. The through hole is also provided with a limiting structure that limits the plug rod 21 from sliding toward the second airbag 23.

[0028] The connection structure includes a first rack 16 located between the first spring 17 and the first side wall 15. One end of the first rack 16 is fixed to the first side wall 15, and the other end of the first rack 16 is inserted into the first sleeve. The first spring 17 is provided in the first sleeve.

[0029] A gear set 18 is provided between the first rack 16 and the plug rod 21 and meshed with the first rack 16. The gear set 18 includes four gears meshed in sequence and arranged in sequence along the longitudinal direction. The first gear meshes with the first rack 16. The fourth gear farthest from the first rack 16 is meshed with an intermediate rack 19 extending toward the plug rod 21. An intermediate sleeve is provided in the valve body 2 to guide the intermediate rack 19. The intermediate sleeve extends longitudinally. A second rack extending transversely is fixed to the plug rod 21. A second sleeve is provided on the valve body 2 to guide the second rack. A gear meshing with the intermediate rack 19 is meshed on the second rack.

[0030] The limiting structure includes a limiting groove located at the upper end of the perforation, a limiting block 22 is provided in the limiting groove, and a limiting plate is provided on the limiting block 22, which extends into the perforation and is inserted into the plug rod 21. The perforation is connected to the limiting groove through a limiting channel, and the limiting perforation is located between the second airbag 23 and the limiting plate.

[0031] The plug rod 21 and the parts used for transmission between the plug rod 21 and the first side wall 15 are made of stable materials with little thermal expansion and contraction, that is, materials with low thermal expansion coefficients. These materials belong to the existing technology, such as silicon nitride ceramics or Invar alloys, nitrided steel, titanium alloys, etc.

[0032] The heating oil passes through the power generation heat exchange box 3 and enters the water heater 4 to exchange heat with water.

[0033] The distance between the side wall of the second airbag 23 and the second limiting frame 9 is smaller than the distance between the first airbag 24 and the first limiting frame 8 .

[0034] The valve body 2 is provided with a temperature sensor and a pressure sensor.

[0035] A method for using a comprehensive heat collection system based on a trough solar collector, characterized in that it includes the following steps: when sunlight is weak, the heating temperature of the heat exchange oil entering the trough solar collector is low and cannot reach the temperature of the water in the evaporation electric heat exchange box 3. In order to make the heat exchange oil reach the required temperature as soon as possible, this part of the heat exchange oil needs to be returned to the trough solar collector for reheating. After the heat exchange oil is initially heated and enters the valve body 2, the temperature of the heat exchange oil causes the air in the air storage pipe 10 to expand. After the air expands, it enters the first air bag 24 along the first pressure valve 11. The first air bag 24 expands and cooperates with the first limit frame 8 to block the first outlet 6. The heat exchange oil can only flow back from the second outlet 7. At this time, the first air bag 24 drives the middle rack 19 to move downward through the first rack 16 and the gear set 18. The middle rack 19 drives the plug rod 21 to move away from the second air bag 23 through the gear. Since the second air bag 23 is not expanded at this time, it is restricted by the limit plate at this time and the plug rod 21 cannot move inward. Therefore, the first side wall 15 cannot move at this time. When the heat exchange oil is heated to a certain temperature and stabilized, the air in the first airbag 24 and the air storage pipe 10 continues to expand, so the air enters the middle pipe 14 and the second airbag 23 along the second pressure valve 12, and the second airbag 23 expands and cooperates with the second limit frame 9 to block the second outlet 7. At this time, part of the second airbag 23 enters the perforation and enters the limit groove through the limit channel, so that the limit block 22 moves upward, thereby moving the limit plate upward, releasing the restraint of the plug rod 21. Due to the expansion of the first airbag 24 at this time, the plug rod 21 has a tendency to compress the second spring 20. Therefore, at this time, the plug rod 21 moves in the direction of the second spring 20 under the drive of the middle rack 19, thereby The second spring 20 is compressed. At this time, the first side wall 15 moves a distance toward the spring driven by the first airbag 24, and part of the heat exchange oil enters the first outlet 6. At the same time, the plug rod 21 continues to compress the second spring 20 under the second airbag 23. The movement of the plug rod 21 drives the middle rack 19 upward through the gear. The middle rack 19 drives the first rack 16 to compress the first spring 17 through the gear set 18, thereby causing the first side wall 15 to continue to move toward the first spring 17, thereby forming a larger gap between the first side wall 15 and the first airbag 24, and the heat exchange oil enters the first outlet 6 through the gap; thus, the high-temperature heat exchange oil enters the power generation heat exchange box 3 from the first outlet 6; When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first air bag 24 and the second air bag 23 cools and contracts. Driven by the first spring 17 and the second spring 20, the first side wall 15 and the plug rod 21 are reset, and the limit plate is inserted into the plug rod 21, and the heat exchange oil is stopped from entering the heat collecting pipe. When it drops to a certain temperature, the air pump is driven to suck away the air in the first air bag 24, the middle pipe 14, the second air bag 23 and the air storage pipe 10 through the air intake port, and then the air is replenished into the air storage pipe 10 through the air inlet.

[0036] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A comprehensive heat collection system based on a trough solar collector, comprising a trough solar collector and a discharge heat exchange box, characterized in that: The invention also includes a conduction valve located between the trough solar energy and the discharge heat exchange box, the conduction valve including a valve body (2), an inlet (5) connected to the oil outlet of the trough solar energy collector tube, and a first outlet (6) and a second outlet (7) arranged opposite to each other and respectively connected to the power generation heat exchange box (3) and the oil inlet of the collector tube, a first limit frame (8) and a second limit frame (9) respectively arranged corresponding to the first outlet (6) and the second outlet (7) are provided in the valve body (2), a first air bag (24) and a second air bag (23) are provided in the first limit frame (8) and the second limit frame (9), and an air storage pipe (10) and an intermediate air bag (11) are provided between the first air bag (24) and the second air bag (23). The connecting port of the air storage pipe (10) and the first air bag (24) is provided with a first pressure valve (11) for feeding air into the first air bag (24), the connecting port of the air storage pipe (10) and the second air bag (23) is provided with a third pressure valve (13) for feeding air into the air outlet valve, the connecting port of the intermediate pipe (14) and the first air bag (24) is provided with a second pressure valve (12) for feeding air into the intermediate pipe (14), the other end of the intermediate pipe (14) is connected to the second air bag (23), the contact area between the first limit frame (8) and the heat exchange oil is larger than the contact area between the second limit frame (9) and the heat exchange oil, and the air storage pipe (10) is also provided with an air inlet and an air intake.

2. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 1, characterized in that: The corners of the inner side surface and the four side edges of the first airbag (24) are arc-shaped and extend from the inside to the outside.

3. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 1, characterized in that: The first side wall (15) of the first limit frame (8) is slidably connected to the valve body (2) in the transverse direction. A first spring (17) is provided in the valve body (2) to drive the first side wall (15) to move toward the first airbag (24). The second limit frame (9) is provided with a through hole that transversely penetrates the side wall of the second limit frame (9). After the second airbag (23) is expanded, it extends into the through hole. A plug rod (21) that extends transversely and is arranged corresponding to the side wall is also slidably connected in the through hole. A second spring (20) is provided on the valve body (2) to drive the plug rod (21) to move toward the second airbag (23). The plug rod (21) and the first side wall (15) are connected by a connecting structure. The movement of the plug rod (21) drives the movement of the first side wall (15). A limiting structure is also provided in the through hole to limit the plug rod (21) from sliding toward the second airbag (23).

4. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 3, characterized in that: The connection structure comprises a first rack (16) located between the first spring (17) and the first side wall (15), a gear set (18) located between the first rack (16) and the plug rod (21) and meshing with the first rack (16), a gear of the gear set (18) meshing with an intermediate rack (19) extending toward the plug rod (21), a second rack fixedly connected to the plug rod (21), and a gear meshing with the intermediate rack (19) on the second rack.

5. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 4, characterized in that: The limiting structure comprises a limiting groove located at the upper end of the perforation, a limiting block (22) is provided in the limiting groove, a limiting plate is provided on the limiting block (22) and extends into the perforation and is inserted into the plug rod (21), the perforation is connected to the limiting groove through a limiting channel, and the limiting perforation is located between the second airbag (23) and the limiting plate.

6. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 1, characterized in that: The heating oil passes through the power generation heat exchange box (3) and enters the water heater (4) to exchange heat with water.

7. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 2, characterized in that: The distance between the side wall of the second airbag (23) and the second limiting frame (9) is smaller than the distance between the first airbag (24) and the first limiting frame (8).

8. The integrated solar thermal collector system based on trough solar thermal collectors according to claim 2, characterized in that: A temperature sensor and a pressure sensor are provided in the valve body (2).

9. The method for using the integrated solar thermal collector system based on trough solar thermal collectors according to claim 8, characterized in that: The following steps are involved: When the sunlight is weak, the heating temperature of the heat exchange oil entering the trough solar energy storage device is low and cannot reach the temperature of the water in the evaporating electric heat exchange box (3). In order to make the heat exchange oil reach the required temperature as soon as possible, it is necessary to return this part of the heat exchange oil to the trough solar energy storage device for reheating. After the heat exchange oil is initially heated and enters the valve body (2), the temperature of the heat exchange oil causes the air in the gas storage pipe (10) to expand. After the air expands, it flows along the first pressure valve (11) into the first air bag (24). The first air bag (24) expands and cooperates with the first limit frame (8) to block the first outlet (6). The heat exchange oil can only flow back from the second outlet (7). When the heat exchange oil is heated to a certain temperature and stabilized, the air in the first airbag (24) and the air storage pipe (10) continues to expand, so the air flows along the second pressure valve (12) into the intermediate pipe (14) and the second airbag (23). The second airbag (23) expands and cooperates with the second limit frame (9) to block the second outlet (7). At this time, the heat exchange oil continues to enter the valve body (2), and the pressure in the valve body (2) increases. Since the contact area between the first airbag (24) and the heat exchange oil is large, the thickness of the airbag at the arc corner is small, and under the guidance of the arc corner, The heat exchange oil will break through the first airbag (24) and the first limit frame (8) and flow into the power generation heat exchange box (3) from the first outlet (6). At the same time, the flowing heat exchange oil also squeezes the first airbag (24), compressing the first airbag (24). The air in the first airbag (24) enters the intermediate pipe (14) and the second airbag (23) through the second pressure valve (12), thereby further enhancing the sealing strength between the second airbag (23) and the second limit frame (9), thereby achieving the high-temperature heat exchange oil entering the power generation heat exchange box (3) from the first outlet (6); When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first air bag (24) and the second air bag (23) cools and contracts. Part of the heat exchange oil will be reheated from the second outlet (7) to ensure the temperature of the subsequent heat exchange oil. When the temperature of the heat exchange oil continues to drop, the heat exchange oil is stopped from entering the heat collecting pipe. When it drops to a certain temperature, the air pump is driven to suck away the air in the first air bag (24), the intermediate pipe (14), the second air bag (23) and the air storage pipe (10) through the air intake port, and then the air is replenished into the air storage pipe (10) through the air intake port.

10. The method for using the integrated solar thermal collector system based on trough solar thermal collectors according to claim 5, characterized in that: The following steps are involved: When the sunlight is weak, the heating temperature of the heat exchange oil entering the trough solar energy storage tank is low and cannot reach the temperature of the water in the evaporating electric heat exchange box (3). In order to make the heat exchange oil reach the required temperature as soon as possible, it is necessary to return this part of the heat exchange oil to the trough solar energy storage tank for reheating. After the heat exchange oil is initially heated and enters the valve body (2), the temperature of the heat exchange oil causes the air in the gas storage pipe (10) to expand. After the air expands, it enters the first air bag (24) along the first pressure valve (11). The first air bag (24) expands and collides with the first limit valve (24). The positioning frame (8) cooperates to block the first outlet (6), and the heat exchange oil can only flow back from the second outlet (7). At this time, the first airbag (24) drives the middle rack (19) to move downward through the first rack (16) and the gear set (18), and the middle rack (19) drives the plug rod (21) to move away from the second airbag (23) through the gear. Since the second airbag (23) is not expanded at this time, the plug rod (21) cannot move inward due to the restriction of the positioning plate. Therefore, the first side wall (15) cannot move at this time; When the heat exchange oil is heated to a certain temperature and stabilized, the air in the first airbag (24) and the air storage pipe (10) continues to expand, so the air enters the middle pipe (14) and the second airbag (23) along the second pressure valve (12). The second airbag (23) expands and cooperates with the second limit frame (9) to block the second outlet (7). At this time, part of the second airbag (23) enters the perforation and enters the limit groove through the limit channel, so that the limit block (22) moves upward, thereby moving the limit plate upward, releasing the restraint of the plug rod (21). Due to the expansion of the first airbag (24) at this time, the plug rod (21) has a tendency to compress the second spring (20). Therefore, at this time, the plug rod (21) moves in the direction of the second spring (20) under the drive of the middle rack (19), thereby compressing the second spring (20). The second spring (20) is driven by the first airbag (24). At this time, the first side wall (15) moves a distance toward the spring under the drive of the first airbag (24), and part of the heat exchange oil enters the first outlet (6). At the same time, the plug rod (21) continues to compress the second spring (20) in the second airbag (23). The movement of the plug rod (21) drives the middle rack (19) to move upward through the gear. The middle rack (19) drives the first rack (16) to compress the first spring (17) through the gear set (18), so that the first side wall (15) continues to move toward the first spring (17), thereby forming a larger gap between the first side wall (15) and the first airbag (24), and the heat exchange oil enters the first outlet (6) from the gap; thereby, the high-temperature heat exchange oil enters the power generation heat exchange box (3) from the first outlet (6); When the sunlight is weak, the temperature of the heat exchange oil gradually decreases, and the air in the first air bag (24) and the second air bag (23) cools and contracts. Driven by the first spring (17) and the second spring (20), the first side wall (15) and the plug rod (21) are reset, and the heat exchange oil is stopped from entering the heat collecting pipe. When the temperature drops to a certain level, the air pump is driven to suck away the air in the first air bag (24), the intermediate pipe (14), the second air bag (23) and the air storage pipe (10) through the air intake port, and then the air is replenished into the air storage pipe (10) through the air intake port.

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