Engine exhaust pipe exhaust heat recovery device

Abstract

The application relates to an engine exhaust pipe exhaust waste heat recycling device, which makes the low-boiling-point medium change in state through the high temperature of the exhaust pipe, thereby blowing the steam turbine to rotate and driving the generator to generate electricity. Compared with the prior art, the low-boiling-point medium does not need to be controlled at low temperature, and only needs to be maintained at a temperature below the boiling point during gas-liquid conversion, so that the investment cost is low. Through the arrangement of the liquid-gas conversion pipeline, the initial speed of the gas can be greatly improved, the steam turbine can be maintained at high speed, the efficient power generation efficiency can be effectively ensured, and in addition, the setting of the limiting rod can limit the stability of the pre-diameter expansion cylinder to a certain extent, so that the pre-diameter expansion cylinder is not prone to large-scale radial displacement due to vibration caused by automobile driving or gas impact, thereby effectively maintaining the stability of the liquid-gas conversion pipeline as a whole, preventing the low-boiling-point medium from being accidentally leaked and lost, and effectively maintaining efficient and stable power generation.

Description

TECHNICAL FIELD

[0001] The application relates to a waste heat recycling device, in particular to an engine exhaust pipe exhaust waste heat recycling device applied to the field of engines. BACKGROUND

[0002] In recent years, with the vigorous development of the automobile industry in China, more and more vehicles are owned. However, during the operation of the automobile engine, nearly 60% of the heat of the engine is taken away by the exhaust gas and the cooling liquid, and at present, the heat of the automobile engine is not recycled, resulting in great energy waste.

[0003] A patent CN201821609438.X specification discloses an engine cooling liquid waste heat recycling system, the utility model discloses a nested structure of shell and inner shell, the shell is filled with cooling liquid, the inner shell stores the high-temperature cooling liquid of backflow, and the heat exchange rate is effectively improved through the conduction of heat exchange fins and radiating fins, and the power generation effect is increased.

[0004] However, the above-mentioned power generation by temperature difference needs a large amount of cooling liquid, and the temperature of the engine is relatively high during the operation of the automobile, and the carrying, refrigeration and cold preservation of a large amount of cooling liquid all need to invest a large cost, and too much cooling liquid also easily affects the driving of the automobile, resulting in poor comprehensive benefit of waste heat recovery power generation, and when the cooling liquid cannot maintain low temperature, the temperature difference is not easy to maintain, so that the power generation efficiency is low.

[0005] APPLICATION CONTENT

[0006] In view of the above prior art, the technical problem to be solved by the application is that the power generation efficiency of the power generation by temperature difference is low, and the cost is high.

[0007] To solve the above-mentioned problems, the application provides an engine exhaust pipe exhaust waste heat recycling device, which comprises a water jacket sleeved outside an exhaust pipe, a variable-diameter supercharger communicated with the water jacket, a steam turbine connected with the outlet end of the variable-diameter supercharger through a gas guide pipe and a generator connected with the output shaft of the steam turbine, the generator is connected with a power battery through an inverter unit, the water jacket is filled with a low-boiling-point medium, the exhaust outlet end of the steam turbine is connected with a condenser through a liquid guide pipe, the condenser is connected with a water storage pot through a liquid guide pipe, the water storage pot and the water jacket are connected with each other and communicated through the liquid guide pipe, and a one-way valve is installed on the liquid guide pipe between the water storage pot and the water jacket; the water jacket and the variable-diameter supercharger are connected and communicated through a liquid-to-gas pipeline, the liquid-to-gas pipeline comprises an air inlet section connected and communicated with the water jacket, an air outlet section connected and communicated with the variable-diameter supercharger and a pre-expansion cylinder connected between the air inlet section and the air outlet section, an outer protection cylinder is arranged at the outer end of the air inlet section, and a plurality of uniformly distributed supporting rods are connected between the outer protection cylinder and the air inlet section.

[0008] In the engine exhaust pipe exhaust waste heat recycling device, the low boiling point medium is changed in state by the high temperature of the exhaust pipe, thereby blowing the steam turbine to rotate and driving the generator to generate electricity. Compared with the prior art, the low boiling point medium does not need to be controlled at a low temperature, and only needs to be maintained at a temperature below the boiling point during gas-liquid conversion, thereby reducing the investment cost. Furthermore, the initial speed of the gas can be greatly improved by the liquid-gas pipeline, so that the steam turbine can maintain high-speed rotation and effectively ensure high power generation efficiency.

[0009] As a further improvement of the present application, the inner diameter of the outlet section is smaller than that of the inlet section, and both are made of hard material resistant to high temperature.

[0010] As a further improvement of the present application, the pre-expanding cylinder includes an outward extending section fixedly connected with the outlet section and an outward expanding section fixedly connected with the inlet section, the end of the outward extending section and the outward expanding section close to each other, and the outward expanding section is made of elastic sealing material resistant to high temperature.

[0011] As a further improvement of the present application, the outward extending section includes a plurality of outward extending pieces uniformly distributed and a plurality of connecting piece layers fixedly connected between adjacent two outward extending pieces, and both ends of the outward extending piece and the connecting piece layer are respectively sealed and fixed with the adjacent outlet section and the outward expanding section.

[0012] As a further improvement of the present application, the outward extending piece is made of elastic metal material, and the connecting piece layer is made of sealing flexible material.

[0013] As a further improvement of the present application, a plurality of magnetic pieces corresponding to the plurality of outward extending pieces are fixedly embedded in the outer protective cylinder, and an iron piece is fixedly embedded in the outer end of each outward extending piece close to the outward expanding section, and the iron piece is wrapped with a sponge pad. When the connecting piece layer is fully stretched, the outer edge of the end of the outward extending section close to the outward expanding section is in contact with the inner wall of the outer protective cylinder.

[0014] As another improvement of the present application, the support rod is fixedly penetrated through the outer protective cylinder and extends to the outside of the outer protective cylinder, the outer end of the support rod is fixedly connected with a limiting rod, the outer end of the outlet section is fixedly connected with an annular support plate, and a plurality of limiting rods are movably penetrated through the annular support plate.

[0015] As a further improvement of the present application, the limiting rod includes a micro-rod fixed with the outer protective cylinder, a fixed rod fixedly connected with the upper end of the micro-rod, and a limiting ring fixedly connected with the end of the fixed rod, and the fixed rod and the limiting ring are located on the side of the annular support plate away from the inlet section.

[0016] As a further improvement of the present application, the micro-rod is of elastic structure, the fixed rod is of hard structure, a limit-shaped hole is opened in the upper end of the micro-rod, and two groups of opposite state measuring rows are fixedly connected in the limit-shaped hole. The state measuring row includes a plurality of biasing hard pieces fixedly connected with the inner wall of the limit-shaped hole, and a plurality of coaxial holes are opened in the middle of the plurality of biasing hard pieces. The plurality of biasing hard pieces on the two state measuring rows are distributed in cross.

[0017] As a further improvement of the present application, the offset hard sheet outer end is not in contact with the inner wall of the limiting hole, and the distance between the two adjacent and intersecting offset hard sheets is not greater than the thickness of the offset hard sheet.

[0018] In summary, the low-boiling medium is subjected to a cyclic change in state by the high temperature of the exhaust pipe, thereby blowing the steam turbine to rotate and driving the generator to generate electricity. Compared with the prior art, the low-boiling medium does not need to be controlled at a low temperature, and only needs to be maintained at a temperature below the boiling point during its gas-liquid conversion, thereby reducing the investment cost. In addition, through the arrangement of the liquid-to-gas pipeline, the initial speed of the gas can be greatly improved, the steam turbine can be maintained at a high speed, and the efficient power generation efficiency can be effectively ensured. In addition, the arrangement of the limiting rod can limit the stability of the pre-diameter expansion cylinder to a certain extent, so that it is not easy to be displaced in a large range in the radial direction due to automobile driving or gas impact, thereby effectively maintaining the stability of the liquid-to-gas pipeline as a whole, preventing the low-boiling medium from being accidentally leaked and lost, and effectively maintaining efficient and stable power generation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The main system block diagram of the first embodiment of the present application is shown in the figure;

[0020] Figure 2 The schematic diagram of the exhaust pipe of the first embodiment of the present application is shown in the figure;

[0021] Figure 3 The perspective view of the liquid-to-gas pipeline of the first embodiment of the present application is shown in the figure;

[0022] Figure 4 The front view of the liquid-to-gas pipeline of the first embodiment of the present application is shown in the figure;

[0023] Figure 5 The front view of the liquid-to-gas pipeline of the first embodiment of the present application is shown in the figure;

[0024] Figure 6 The perspective view of the liquid-to-gas pipeline of the first embodiment of the present application is shown in the figure;

[0025] Figure 7 The front view of the liquid-to-gas pipeline of the first embodiment of the present application is shown in the figure;

[0026] Figure 8 The vertical front view of the liquid-to-gas pipeline of the second embodiment of the present application is shown in the figure;

[0027] Figure 9 The front view of the limiting rod of the second embodiment of the present application is shown in the figure;

[0028] Figure 10 The longitudinal sectional view of the limiting rod of the third embodiment of the present application is shown in the figure;

[0029] Figure 11 Figure 3 is a radial sectional view of the limiting rod part in the third embodiment of the present application.

[0030] Explanation of reference numerals in the figures:

[0031] 11 air outlet section, 12 air inlet section, 13 flaring section, 131 flaring piece, 132 connecting piece layer, 14 flaring section, 2 support rod, 21 annular support plate, 3 outer sleeve, 4 sponge pad, 5 limiting rod, 51 micro-motion rod, 52 fixed rod, 53 limiting ring, 6 offset hard piece. DETAILED DESCRIPTION

[0032] The two embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] First embodiment:

[0034] Figures 1-2 An engine exhaust pipe exhaust waste heat recycling device is shown, wherein a represents the exhaust pipe, b represents the water jacket, including the water jacket sleeved outside the exhaust pipe, the variable-diameter supercharger communicated with the water jacket, the steam turbine connected with the outlet end of the variable-diameter supercharger through the air guide pipe, and the generator connected with the output shaft of the steam turbine, the generator is connected with the power battery through the inverter unit, the water jacket is filled with low-boiling point medium, the exhaust outlet end of the steam turbine is connected with the condenser through the liquid guide pipe, the condenser is connected with the water storage pot through the liquid guide pipe, the water storage pot and the water jacket are connected with each other and communicated through the liquid guide pipe, and the one-way valve is installed on the liquid guide pipe between the water storage pot and the water jacket;

[0035] Among them, the low-boiling point medium is one of ethanol, acetone and carbon disulfide.

[0036] As Figures 3-4 , the water jacket and the variable-diameter supercharger are connected and communicated through the liquid-to-gas pipeline, the liquid-to-gas pipeline includes the air inlet section 12 connected and communicated with the water jacket, the air outlet section 11 connected and communicated with the variable-diameter supercharger, and the pre-expanding cylinder connected between the air inlet section 12 and the air outlet section 11, the outer end of the air inlet section 12 is provided with the outer sleeve 3, a plurality of uniformly distributed support rods 2 are connected between the outer sleeve 3 and the air inlet section 12, through the setting of the liquid-to-gas pipeline, the speed of the gas formed by the low-boiling point medium can be preliminarily improved before entering the supercharger, and then the initial speed of the gas entering the supercharger is higher, the speed after supercharging is higher, the impact on the steam turbine is higher, the speed is faster, and the power generation efficiency is effectively improved.

[0037] The inner diameter of the air outlet section 11 is smaller than the inner diameter of the air inlet section 12, and both are made of high-temperature-resistant hard material, so that the speed of the gas formed by the low-boiling point medium can be preliminarily accelerated after entering the liquid-to-gas pipeline.

[0038] As Figures 5-6 , the pre-diameter expansion cylinder includes an outer expansion section 13 fixedly connected with the gas outlet section 11 and an outer expansion section 14 fixedly connected with the gas inlet section 12, the ends of the outer expansion section 13 and the outer expansion section 14 close to each other, the outer expansion section 14 is made of high-temperature-resistant elastic sealing material, which can adapt to the expansion of the plurality of outer expansion pieces 131, and further increase the inner diameter of the pre-diameter expansion cylinder close to the gas inlet section 12, effectively increase the inner diameter difference at the gas outlet section 11, facilitate the preliminary pressurization of the gas when passing through the place, and accelerate the speed. The outer expansion section 13 includes a plurality of uniformly distributed outer expansion pieces 131 and a plurality of connecting piece layers 132 respectively fixedly connected between adjacent two outer expansion pieces 131, both ends of the outer expansion piece 131 and the connecting piece layer 132 are respectively sealed and fixed with the adjacent gas outlet section 11 and the outer expansion section 14, effectively ensuring the sealing of the whole pre-diameter expansion cylinder, preventing the low-boiling-point medium from flowing out when passing through it, and facilitating continuous recycling.

[0039] The outer expansion piece 131 is made of elastic metal material, so that under the pressure of the gas itself, the outer expansion piece 131 is connected with the gas outlet section 11 as a fulcrum end, the other end can be expanded under the extrusion, and the outer expansion section 14 is adaptively expanded, facilitating the realization of the inner diameter difference between the pre-diameter expansion cylinder and the gas outlet section 11. The connecting piece layer 132 is made of sealing flexible material, which can limit the maximum expansion range of the pre-diameter expansion cylinder and protect the outer expansion section 14 from excessive expansion.

[0040] A plurality of magnetic sheets corresponding to the plurality of outer expansion pieces 131 are fixedly embedded in the outer protective cylinder 3, and an iron sheet is fixedly embedded in the outer end of each outer expansion piece 131 close to the outer expansion section 14, so that after the outer expansion piece 131 is expanded under the action of gas pressure, the end of the outer expansion piece 131 close to the inner wall of the outer protective cylinder 3 generates mutual adsorption force, which can assist the expansion effect of the gas pressure, maintain the stability of the pre-diameter expansion cylinder after expansion, and make the whole power generation process relatively stable. Figure 7 The iron sheet is wrapped with a sponge pad 4, and the outer edge of the outer expansion section 13 close to the outer expansion section 14 abuts against the inner wall of the outer protective cylinder 3 after the connecting piece layer 132 is fully stretched, and the sponge pad 4 is used to protect the contact between the two from being damaged due to extrusion and friction.

[0041] It is worth noting that the adsorption force between the magnetic sheet and the iron sheet is less than the force for restoring the deformation of the corresponding connecting piece layer 132 and the outer expansion section 14, so that the pre-diameter expansion cylinder can reset and not easily maintain the expanded state for a long time under the support of the gas pressure.

[0042] In the engine exhaust pipe exhaust heat recovery device, the low boiling point medium is changed in state by the high temperature of the exhaust pipe, so as to drive the steam turbine to rotate and drive the generator to generate electricity. Compared with the prior art, the low boiling point medium does not need to be controlled at low temperature, and only needs to be maintained at a temperature below the boiling point during gas-liquid conversion, so that the investment cost is low. And through the setting of the liquid-gas pipeline, the initial speed of the gas can be greatly improved, so that the steam turbine can maintain high-speed rotation, effectively ensuring high power generation efficiency.

[0043] The second embodiment is:

[0044] The embodiment adds the following content on the basis of the first embodiment, and the remaining parts remain the same as the first embodiment.

[0045] Please refer to Figure 8 The outer end of the support rod 2 is fixedly connected with a limiting rod 5, and the outer end of the gas outlet section 11 is fixedly connected with an annular support plate 21. A plurality of limiting rods 5 movably penetrate the annular support plate 21, so that a large vibration force is generated during automobile driving or when gas passes through the place. The limiting rod 5 can effectively limit the pre-expanding cylinder and the gas outlet section 11 connected thereto from being easily displaced in a large range in the radial direction due to vibration, thereby effectively maintaining the stability of the liquid-gas pipeline as a whole, preventing the interface from loosening due to vibration, and preventing the low boiling point medium from leaking and losing.

[0046] As Figure 9 The limiting rod 5 includes a micro-rod 51 fixed with the outer cylinder 3, a fixed rod 52 fixedly connected to the upper end of the micro-rod 51, and a limiting ring 53 fixedly connected to the end of the fixed rod 52. The fixed rod 52 and the limiting ring 53 are located on the side of the annular support plate 21 away from the gas inlet section 12. The micro-rod 51 is of elastic structure, and the fixed rod 52 is of hard structure, so that the micro-rod 51 penetrating the annular support plate 21 is elastic, and the limiting rod 5 cannot completely limit the position of the pre-expanding cylinder. It can deform within a certain amplitude with vibration, thereby playing a certain buffering effect. When the vibration amplitude is too large, the micro-rod 51 deforms and moves on the annular support plate 21. When the hard fixed rod 52 enters the annular support plate 21, the annular support plate 21 and the limiting rod 5 are in hard contact, thereby making the limiting effect on the pre-expanding cylinder better. At the same time, the limiting ring 53 can effectively limit the transverse displacement amplitude of the pre-expanding cylinder.

[0047] The third embodiment is:

[0048] The embodiment adds the following content on the basis of the second embodiment, and the remaining parts remain the same as the second embodiment.

[0049] As Figures 10-11, the upper end of the micro-rod 51 is drilled with a limited shape hole, and two groups of opposite measuring rows are fixedly connected in the limited shape hole, the measuring row includes a plurality of deflection hard sheets 6 fixedly connected to the inner wall of the limited shape hole, the plurality of deflection hard sheets 6 on the two measuring rows are distributed in cross, such as Figure 11 , the outer end of the deflection hard sheet 6 is not in contact with the inner wall of the limited shape hole, the distance between the adjacent and crossed two deflection hard sheets 6 is not greater than the thickness of the deflection hard sheet 6, when vibrating, the elastic micro-rod 51 is bent and deformed with the pre-diameter expansion cylinder, when it is bent, the deflection hard sheets 6 at the bending position are in contact with each other, and then the bending amplitude of the micro-rod 51 is limited, so as to ensure that the moving amplitude of the pre-diameter expansion cylinder is not easy to be too large when vibrating, thereby effectively ensuring the stability.

[0050] In summary, the high temperature of the exhaust pipe causes the low boiling point medium to change the state of the cycle, thereby blowing the steam turbine to rotate and driving the generator to generate electricity. Compared with the prior art, the low boiling point medium does not need to be controlled at low temperature, and only needs to be maintained at a temperature below the boiling point when it is converted from liquid to gas, so that the investment cost is low. And through the setting of the liquid-gas conversion pipeline, the initial speed of the gas can be greatly improved, so that the steam turbine can maintain high-speed rotation, effectively ensuring high-efficiency power generation efficiency. In addition, the setting of the limiting rod 5 can limit the stability of the pre-diameter expansion cylinder to a certain extent, so that it is not easy to be displaced in a large range due to the vibration caused by the driving of the automobile or the impact of the gas, thereby effectively maintaining the stability of the liquid-gas conversion pipeline as a whole, preventing the low boiling point medium from being accidentally leaked and lost, and effectively maintaining efficient and stable power generation.

[0051] In combination with the current actual demand, the above-mentioned embodiments adopted by the present application do not limit the protection scope, various changes within the knowledge range of those skilled in the art without departing from the concept of the present application still fall within the protection scope of the present application.

Claims

1. An engine exhaust pipe exhaust heat recovery device, characterized by: The exhaust pipe is provided with a water jacket, a variable-diameter supercharger connected with the water jacket, a steam turbine connected with the outlet end of the variable-diameter supercharger through a gas guide pipe, and a generator connected with the output shaft of the steam turbine, the generator is connected with a power battery through an inverter unit, the water jacket is filled with a low-boiling medium, the steam turbine is provided with a condenser connected with the outlet end of the steam turbine through a liquid guide pipe, the condenser is provided with a water storage kettle connected with the condenser through a liquid guide pipe, the water storage kettle and the water jacket are connected with each other through the liquid guide pipes and are communicated, and a one-way valve is arranged on the liquid guide pipe between the water storage kettle and the water jacket. The water jacket and the variable-diameter supercharger are connected and communicated through a liquid-to-gas pipeline, the liquid-to-gas pipeline comprises an air inlet section (12) connected and communicated with the water jacket, an air outlet section (11) connected and communicated with the variable-diameter supercharger, and a pre-expansion cylinder connected between the air inlet section (12) and the air outlet section (11), and the outer end of the air inlet section (12) is provided with an outer protection cylinder (3), and a plurality of uniformly distributed supporting rods (2) are connected between the outer protection cylinder (3) and the air inlet section (12). The inner diameter of the air outlet section (11) is smaller than that of the air inlet section (12), and both are made of hard material resistant to high temperature; the pre-expansion cylinder comprises an outer expansion section (13) fixedly connected with the air outlet section (11) and an outer expansion section (14) fixedly connected with the air inlet section (12), the end portions of the outer expansion section (13) and the outer expansion section (14) close to each other are close to each other, and the outer expansion section (14) is made of elastic sealing material resistant to high temperature; the outer expansion section (13) comprises a plurality of uniformly distributed outer expansion pieces (131) and a plurality of connecting piece layers (132) fixedly connected between adjacent two outer expansion pieces (131), respectively, and the two ends of the outer expansion piece (131) and the connecting piece layer (132) are sealingly fixed with the adjacent air outlet section (11) and the outer expansion section (14), respectively.

2. An engine exhaust pipe exhaust heat recovery device according to claim 1, characterized by: The outer expansion piece (131) is made of elastic metal material, and the connecting piece layer (132) is made of sealing flexible material.

3. The engine exhaust pipe exhaust heat recovery device of claim 1, wherein: A plurality of magnetic pieces corresponding to the plurality of outer expansion pieces (131) are fixedly embedded in the outer protection cylinder (3), and the outer end of each outer expansion piece (131) close to the outer expansion section (14) is fixedly embedded with an iron piece, and the iron piece is wrapped with a sponge pad (4), and when the connecting piece layer (132) is fully stretched, the outer edge of one end of the outer expansion section (13) close to the outer expansion section (14) abuts against the inner wall of the outer protection cylinder (3).

4. The engine exhaust pipe exhaust heat recovery device of claim 1, wherein: The supporting rod (2) fixedly penetrates the outer protection cylinder (3) and extends out of the outer protection cylinder (3), the outer end of the supporting rod (2) is fixedly connected with a limiting rod (5), the outer end of the air outlet section (11) is fixedly connected with an annular supporting plate (21), and a plurality of limiting rods (5) movably penetrate the annular supporting plate (21).

5. An engine exhaust pipe exhaust heat recovery device according to claim 4, characterized by: The limiting rod (5) comprises a micro-rod (51) fixed with the outer protection cylinder (3), a fixed rod (52) fixedly connected with the upper end of the micro-rod (51), and a limiting ring (53) fixedly connected with the end portion of the fixed rod (52), and the fixed rod (52) and the limiting ring (53) are located on the side of the annular supporting plate (21) away from the air inlet section (12).

6. An engine exhaust pipe exhaust heat recovery device according to claim 5, characterized by: The micro-rod (51) is an elastic structure, the fixed rod (52) is a hard structure, the upper end of the micro-rod (51) is drilled with a limited shape hole, two groups of opposite measuring state rows are fixedly connected in the limited shape hole, the measuring state row comprises a plurality of bias hard sheets (6) fixedly connected to the inner wall of the limited shape hole, coaxial lines (61) are drilled in the middle of the plurality of bias hard sheets (6), and the plurality of bias hard sheets (6) on the two measuring state rows are distributed in cross.

7. An engine exhaust pipe exhaust heat recovery device according to claim 6, characterized by: The outer end of the bias hard sheet (6) is not in contact with the inner wall of the limited shape hole, and the distance between two adjacent and crossed bias hard sheets (6) is not greater than the thickness of the bias hard sheet (6).

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