Waste heat recovery device of hydrogen energy heavy truck

Abstract

The waste heat recovery device of the hydrogen energy heavy truck comprises a shell and an internal gas cylinder, the two sides of the shell are fixedly connected with a leading-out pipeline and a leading-in pipeline respectively, a sealing structure is fixedly arranged at the top end of the shell, a limiting cavity and a heat exchange cavity are sequentially and fixedly arranged in the shell from inside to outside, and the gas cylinder is arranged in the shell. A heat exchange interlayer is embedded between the heat exchange cavity and the limiting cavity, and the guiding-out pipeline and the guiding-in pipeline are located on the upper portion and the lower portion of the two sides of the shell correspondingly and communicate with the heat exchange cavity. The effect of controlling the first sealing seat and the first sealing layer which are correspondingly connected to transversely move and adjust is achieved through the telescopic rod, and the effect of guaranteeing the sealing performance of the sealing structure from the lower position is achieved through the first sealing layer; and the second sealing seat and the second sealing layer are in contact with the corresponding first sealing seat and the first sealing layer to form embedding, so that the sealing effect between the gas cylinder and the shell is ensured.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy technology, and more specifically, to a waste heat recovery device for hydrogen-powered heavy trucks. Background Technology

[0002] With the proposal of environmentally friendly travel, more and more new modes of transportation have appeared in our lives, including hydrogen fuel cell vehicles. The biggest advantage of hydrogen as an energy source is that it reacts with oxygen in the air to produce only water vapor, which effectively reduces the air pollution caused by traditional gasoline vehicles. The hydrogen fuel cell used in these vehicles is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Hydrogen fuel cells generate a lot of heat when they are working.

[0003] Existing patent CN211858806U describes a waste heat recovery device for solid hydrogen storage in a hydrogen fuel cell. Circulating cooling water flows in from the inlet of a spiral wound tube and sequentially heats the heat exchange tubes via heat conduction until waste heat is released, after which the water flows out from the outlet of the spiral wound tube. The device is sealed to the shell via a cap. However, the cap is prone to wear during prolonged use and installation, leading to a deterioration in the sealing effect. To address the problems of patent CN211858806U, Chinese utility model application No. 202321164894.9 proposes another waste heat recovery device for a hydrogen fuel cell. In this device, a pressure block compresses the sealing body, ensuring a tight connection between the sealing body and the waste heat recovery shell and the solid hydrogen storage cylinder. Even if the sealing body is worn, the position of the pressure block can be adjusted to further compress the sealing body, achieving a better sealing connection. A buffer tank within the device allows the cooling water to absorb heat from the solid hydrogen storage cylinder.

[0004] However, the device has the following problems in actual use:

[0005] To ensure a tight seal between the sealing body and the recovery shell, the sealing body is compressed and fixed from above. However, during the waste heat recovery process, the internal pressure changes as heat energy is recovered. Even with the pre-adjustment and compression of the sealing body by adjusting the screw and driving the pressure block, the seal may not be properly sealed between the sealing body and the recovery shell due to internal pressure changes, resulting in heat leakage and poor sealing performance. Furthermore, during use, cooling water directly enters the shell and comes into contact with the surface of the hydrogen storage cylinder. With repeated use, the cooling water easily forms a scale layer on the cylinder surface, which in turn affects the subsequent full recovery of heat energy and reduces the recovery efficiency.

[0006] Therefore, this paper proposes a waste heat recovery device for hydrogen-powered heavy trucks. Utility Model Content

[0007] The present invention aims to solve the technical problems mentioned in the background art and provide a waste heat recovery device for hydrogen-powered heavy trucks. During use, it can effectively ensure the sealing between the recovery shell and the gas cylinder, while having a good heat exchange effect and ensuring full contact and recovery between cooling water and waste heat.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for a hydrogen-powered heavy truck, comprising a shell and an internal gas cylinder, with an outlet pipe and an inlet pipe fixedly connected to both sides of the shell, a sealing structure fixedly provided at the top of the shell, and a limiting cavity and a heat exchange cavity fixedly provided sequentially from the inside to the outside of the shell, with a heat exchange jacket embedded between the heat exchange cavity and the limiting cavity, and the outlet pipe and the inlet pipe located at the upper and lower sides of the shell respectively, communicating with the heat exchange cavity.

[0009] A further preferred embodiment: the limiting cavity is located inside the shell on the inner side, with tapered openings at its upper and lower ends, while the heat exchange cavity is located inside the shell on the outer side, with tapered openings at its upper and lower ends.

[0010] A further preferred option: the heat exchange jacket is made of copper thermally conductive material, and the upper and lower ends and the upper and lower ends of the heat exchange cavity are both arranged to expand outward.

[0011] A further preferred embodiment: the heat exchange jacket is integrally fitted to the surface of the gas cylinder, and the surface of the heat exchange jacket is provided with equidistantly distributed semi-circular inner grooves.

[0012] A further preferred embodiment: The sealing structure includes a fixed outer ring and a first sealing layer located at the bottom end of the fixed outer ring, and a matching telescopic rod and a first sealing seat are fixedly connected to the inner side of the fixed outer ring.

[0013] A further preferred embodiment: the telescopic rod is horizontally set inside the fixed outer ring and fixedly connected to the first sealing seat, and the first sealing layer is located below the first sealing seat.

[0014] A further preferred embodiment: the first sealing seat is configured as a trapezoidal seat body, while the side profile of the first sealing layer is configured in an "L" shape laterally.

[0015] A further preferred embodiment: the sealing structure also includes a second sealing seat and a second sealing layer that are fixedly connected. The second sealing seat is arranged in a trapezoidal shape corresponding to the first sealing seat, and the second sealing layer is arranged in an "L" shape laterally corresponding to the side profile of the first sealing layer. The second sealing seat and the second sealing layer are respectively fitted into the corresponding first sealing seat and the first sealing layer.

[0016] A further preferred embodiment: the second sealing seat and the second sealing layer are stacked, and a cylindrical cavity for embedding the gas cylinder is opened at the center of the surface.

[0017] Beneficial effects:

[0018] 1. The limiting cavity facilitates the installation of the gas cylinder inside the shell, while the heat exchange cavity and the inner heat exchange jacket facilitate the conduction of heat from the shell.

[0019] 2. The telescopic rod controls the lateral movement of the corresponding connected first sealing seat and first sealing layer, and the first sealing layer ensures the sealing performance of the sealing structure from below.

[0020] 3. The second sealing seat and the second sealing layer achieve a fitting with the corresponding first sealing seat and the first sealing layer, thereby ensuring the sealing effect between the gas cylinder and the shell. Attached Figure Description

[0021] Figure 1 This is a front view of the overall structure of this utility model;

[0022] Figure 2 This is a front view of the heat exchange cavity connection structure of this utility model;

[0023] Figure 3 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0024] Figure 4 For the present utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0025] Figure 1-4 In the middle: 1. Shell; 2. Gas cylinder; 3. Outlet pipe; 4. Inlet pipe; 5. Sealing structure; 6. Fixed outer ring; 7. Telescopic rod; 8. First sealing seat; 9. Second sealing seat; 10. First sealing layer; 11. Second sealing layer; 12. Heat exchange chamber; 13. Heat exchange jacket; 14. Limiting cavity. Detailed Implementation

[0026] The following will refer to the appendix in the embodiments of this utility model. Figures 1-4 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0027] Please see Figure 1-4 In this embodiment of the present invention, a waste heat recovery device for a hydrogen-powered heavy truck includes a shell 1 and an internal gas cylinder 2. An outlet pipe 3 and an inlet pipe 4 are fixedly connected to both sides of the shell 1, and a sealing structure 5 is fixedly provided at the top of the shell 1. A limiting cavity 14 and a heat exchange cavity 12 are fixedly provided from the inside to the outside of the shell 1. A heat exchange jacket 13 is embedded between the heat exchange cavity 12 and the limiting cavity 14. The outlet pipe 3 and the inlet pipe 4 are located on the upper and lower sides of the shell 1, respectively, and are connected to the heat exchange cavity 12.

[0028] In this embodiment of the present invention, the limiting cavity 14 is located inside the shell 1 on the inner side, with tapered openings at its upper and lower ends. The heat exchange cavity 12 is located inside the shell 1 on the outer side, with tapered openings at its upper and lower ends. The heat exchange jacket 13 is made of copper and is a thermally conductive jacket. Its upper and lower ends, as well as the upper and lower ends of the heat exchange cavity 12, are both tapered outwards. The heat exchange jacket 13 is fitted to the surface of the gas cylinder 2, and its surface is provided with equidistantly distributed semi-circular inner grooves. The limiting cavity 14 facilitates the limiting installation of the gas cylinder 2 inside the shell 1, while the heat exchange cavity 12 and the inner heat exchange jacket 13 facilitate the conduction of heat from the shell 1.

[0029] External cooling water enters the heat exchange chamber 12 inside the shell 1 through the inlet pipe 4 and flows along the heat exchange chamber 12. The heat generated by the gas cylinder 2 inside the shell 1 is concentrated and discharged through the heat exchange jacket 13 and comes into contact with the cooling water flowing inside the heat exchange chamber 12 to complete the waste heat recovery. The cooling water is discharged outward through the outlet pipe 3. The semi-circular inner grooves evenly distributed on the surface of the heat exchange jacket 13 are conducive to the concentrated heat conduction of the gas cylinder 2 and improve the overall waste heat recovery effect.

[0030] The sealing structure 5 includes a fixed outer ring 6 and a first sealing layer 10 located at the bottom of the fixed outer ring 6. A telescopic rod 7 and a first sealing seat 8 are fixedly connected to the inner side of the fixed outer ring 6. The telescopic rod 7 is horizontally arranged on the inner side of the fixed outer ring 6 and fixedly connected to the first sealing seat 8. The first sealing layer 10 is located below the first sealing seat 8. The first sealing seat 8 is generally trapezoidal, while the side profile of the first sealing layer 10 is horizontally arranged in an "L" shape. The telescopic rod 7 controls the horizontal movement and adjustment of the corresponding connected first sealing seat 8 and first sealing layer 10. The first sealing layer 10 ensures the sealing performance of the sealing structure 5 from below.

[0031] The sealing structure 5 also includes a second sealing seat 9 and a second sealing layer 11 that are fixedly connected. The second sealing seat 9 is arranged in a trapezoidal shape corresponding to the first sealing seat 8. The second sealing layer 11 is arranged in an "L" shape in the side profile of the first sealing layer 10. The second sealing seat 9 and the second sealing layer 11 are respectively fitted into the corresponding first sealing seat 8 and the first sealing layer 10. The second sealing seat 9 and the second sealing layer 11 are stacked together, and a cylindrical cavity for the gas cylinder 2 to be embedded is opened at the center of the surface. The second sealing seat 9 and the second sealing layer 11 achieve contact with the corresponding first sealing seat 8 and the first sealing layer 10 to form a fitting, thereby ensuring the sealing effect between the gas cylinder 2 and the shell 1.

[0032] Gas cylinder 2 is directly embedded into the housing 1 through the cavity opened on the surface of the second sealing seat 9 and the second sealing layer 11. Then, the telescopic rod 7 extends and retracts, causing the first sealing seat 8 and the bottom first sealing layer 10 to approach the second sealing seat 9 and the second sealing layer 11, so that the corresponding sealing seat structure and sealing layer structure come into contact and fit together. During the extension and retraction of the telescopic rod 7, the sealing between the first sealing layer 10 and the second sealing layer 11 can be guaranteed at the same time.

Claims

1. A hydrogen energy heavy truck waste heat recovery device, comprising a shell (1) and an internal gas cylinder (2), characterized in that: The shell (1) is fixedly connected with a leading-out pipeline (3) and a leading-in pipeline (4) on two sides, respectively, and is provided with a sealing structure (5) at the top end; the inside of the shell (1) is sequentially provided with a limiting cavity (14) and a heat exchange cavity (12) from inside to outside, and a heat exchange interlayer (13) is embedded between the heat exchange cavity (12) and the limiting cavity (14); the leading-out pipeline (3) and the leading-in pipeline (4) are located on the upper and lower sides of the shell (1) and are in communication with the heat exchange cavity (12).

2. The waste heat recovery device of the hydrogen energy heavy truck according to claim 1, characterized in that: The limiting cavity (14) is located at the inner side of the inside of the shell (1) and is provided with a tapered narrowing at the upper and lower ends, while the heat exchange cavity (12) is located at the outer side of the inside of the shell (1) and is provided with a tapered expansion outward at the upper and lower ends.

3. The waste heat recovery device of the hydrogen energy heavy truck according to claim 1, characterized in that: The heat exchange interlayer (13) is provided as a copper heat-conducting interlayer, and the upper and lower ends of the heat exchange interlayer (13) are provided as an outward expansion at the same time as the upper and lower ends of the heat exchange cavity (12).

4. The waste heat recovery device of the hydrogen energy heavy truck according to claim 3, characterized in that: The heat exchange interlayer (13) is integrally attached to the surface of the gas cylinder (2), and the surface of the heat exchange interlayer (13) is provided with equidistantly distributed semicircular inner grooves.

5. The waste heat recovery device of the hydrogen energy heavy truck according to claim 1, characterized in that: The sealing structure (5) comprises a fixed outer ring (6) and a first sealing layer (10) located at the bottom end of the fixed outer ring (6), and the inner side of the fixed outer ring (6) is fixedly connected with a matched extension rod (7) and a first sealing seat (8).

6. The waste heat recovery device of the hydrogen energy heavy truck according to claim 5, characterized in that: The extension rod (7) is horizontally provided at the inner side of the fixed outer ring (6) and is fixedly connected with the first sealing seat (8), and the first sealing layer (10) is located below the first sealing seat (8).

7. The waste heat recovery device of the hydrogen energy heavy truck according to claim 5, characterized in that: The first sealing seat (8) is provided as a trapezoidal seat body as a whole, and the first sealing layer (10) is provided as an "L"-shaped transverse section.

8. The waste heat recovery device of the hydrogen energy heavy truck according to claim 5, characterized in that: The sealing structure (5) further comprises a second sealing seat (9) and a second sealing layer (11) fixedly connected, the second sealing seat (9) is provided as a trapezoidal seat body corresponding to the first sealing seat (8) as a whole, the second sealing layer (11) is provided as an "L"-shaped transverse section corresponding to the first sealing layer (10) as a whole, and the second sealing seat (9) and the second sealing layer (11) are embeddedly provided corresponding to the first sealing seat (8) and the first sealing layer (10), respectively.

9. The waste heat recovery device of the hydrogen energy heavy truck according to claim 8, characterized in that: The second sealing seat (9) and the second sealing layer (11) are provided in a superimposed manner, and a cylindrical cavity for embedding the gas cylinder (2) is formed at the central position of the surface.

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