A hydrogen filling port heat preservation device for a vehicle-mounted hydrogen system

Abstract

The utility model belongs to hydrogen filling technology field, concretely is a kind of vehicle-mounted hydrogen system hydrogen inlet heat preservation device, including conveying pipeline;The middle part of conveying pipeline is fixedly connected with shell;The shell is sleeved on the interface of conveying pipeline end part;Multiple chutes are fixedly connected on the lateral wall of shell;Screw rod is connected on chute by screwing;Rotary base is rotatably connected on the end part of screw rod;Door plate is fixedly connected on the end part of rotary base;The end part of door plate and shell is sliding fit;By having shell and openable, closable door plate on conveying pipeline end part, the pipeline connected with conveying pipeline can be closed, direct contact with external air is reduced, air flow is reduced, conveying pipeline and the joint connected therewith are heat preserved, the problem that temperature changes greatly is reduced, and stability when connecting is improved.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen refueling technology, specifically a heat preservation device for the hydrogen refueling port of an on-board hydrogen system. Background Technology

[0002] The hydrogen refueling port of the on-board hydrogen system is used to connect to external hydrogen refueling equipment and safely deliver high-pressure hydrogen to the on-board hydrogen storage tank. Its design must meet requirements such as rapid refueling, leak-proof sealing, and high-pressure environmental adaptability.

[0003] The existing on-board hydrogen refueling port is a device similar to a valve connection port. When in use, the refueling port is connected to the hydrogen refueling equipment, and then hydrogen fuel can be delivered. After delivery, the refueling operation is completed by closing the valve.

[0004] When the hydrogen refueling port of the existing vehicle hydrogen system is in operation, the hydrogen being transported is in a low temperature and high pressure state. Therefore, the hydrogen refueling port is at room temperature before the transportation process, but at a low temperature during transportation. This can easily lead to icing at the hydrogen refueling port or damage or leakage at the interface due to thermal expansion and contraction of the materials.

[0005] Therefore, this utility model provides a heat preservation device for the hydrogen refueling port of an on-board hydrogen system. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A hydrogen refueling port insulation device for a vehicle-mounted hydrogen system, comprising a delivery pipeline; a shell fixedly connected to the middle of the delivery pipeline; the shell sleeved on the interface at the end of the delivery pipeline; multiple sliding grooves fixedly connected to the side wall of the shell; a screw threadedly connected to the sliding groove; a rotating seat rotatably connected to the end of the screw; a door plate fixedly connected to the end of the rotating seat; the door plate and the end of the shell are in sliding fit; by sleeved with the shell and the openable / closable door plate at the end of the delivery pipeline, the pipeline connected to the delivery pipeline can be sealed, reducing direct contact with outside air, reducing airflow, achieving insulation of the delivery pipeline and the joint connected to it, reducing the problem of large temperature changes, and improving the stability of the connection.

[0008] Furthermore, the shell sidewall is provided with a vent hole that penetrates the inside and outside of the shell; a connecting pipe is connected in the middle of the vent hole; by providing a connecting pipe on the shell sidewall that can extract the gas inside the shell, the air content at the end of the delivery pipeline can be further reduced when the shell is used to insulate the end of the delivery pipeline, which can reduce the intrusion of environmental heat and significantly reduce the loss of liquid hydrogen vaporization; this setting can further improve the insulation effect of the delivery pipeline and its end hydrogen refueling pipeline.

[0009] Furthermore, multiple sealing plates are fixedly connected to the side walls of the two door panels that are close to each other; a sealing groove is opened on the side wall of the door panel; a sealing strip is fixedly connected to the side wall of the door panel; when the two door panels are closed, the sealing strip can be inserted into the sealing groove; by providing sealing plates, after the two door panels are closed, the sealing strip can be inserted into the sealing groove of the other door panel, thereby achieving further sealing after the door panels are closed and reducing the problem of air entering the housing.

[0010] Furthermore, a limiting plate is fixedly connected to the side wall of the door panel; the limiting plate is semi-circular; multiple rubber plates are fixedly connected to the inner side wall of the limiting plate; by providing a limiting plate on the side wall of the door panel, the rubber plates can fit against the middle of the hydrogen delivery pipeline, and at the same time, according to the deformation of the rubber plates themselves, the contact area with the pipeline is increased, thereby further improving the sealing performance after the door panel is closed, reducing the problem of air entering the shell and affecting the ambient temperature around the delivery pipeline.

[0011] Furthermore, a mesh plate is fixed to the inner wall of the housing; the mesh plate covers the vent hole; by providing a mesh plate at the end of the vent hole, the problem of impurities entering the vent hole and connecting pipe inside the housing and affecting the air delivery rate of the vent hole and connecting pipe can be reduced, and the problem of blockage of the vent hole and connecting pipe can be reduced.

[0012] Preferably, the side wall of the shell is fixed with an insulation layer; by providing an insulation layer on the outer wall of the shell, the temperature inside the shell can be further stabilized and the temperature change inside the shell can be reduced.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The hydrogen refueling port insulation device of the vehicle-mounted hydrogen system described in this utility model can seal the pipeline connected to the pipeline by covering the end of the delivery pipeline with a shell and an openable and closable door panel, thereby reducing direct contact with the outside air, reducing air flow, and achieving insulation of the delivery pipeline and the joint connected to it, reducing the problem of large temperature changes and improving the stability of the connection.

[0015] 2. The hydrogen refueling port insulation device of the vehicle-mounted hydrogen system described in this utility model, by providing a connecting pipe on the side wall of the shell that can extract the gas inside the shell, can further reduce the air content at the end of the delivery pipe when the shell is used to insulate the end of the delivery pipe, thereby reducing the intrusion of environmental heat and significantly reducing the loss of liquid hydrogen vaporization; this setting can further improve the insulation effect of the delivery pipe and its end hydrogen refueling pipeline. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a schematic diagram of the door panel of this utility model in the open state;

[0019] Figure 3 This is a cross-sectional view of the shell in this utility model;

[0020] Figure 4 This is a cross-sectional view of the door panel in this utility model;

[0021] Figure 5 This is a schematic diagram of the fit between the door panel and the limiting plate;

[0022] In the diagram: 1. Conveying pipe; 11. Shell; 12. Slide groove; 13. Screw; 14. Rotating seat; 15. Door panel; 2. Vent hole; 21. Connecting pipe; 3. Sealing sheet; 31. Sealing groove; 32. Sealing strip; 4. Limiting plate; 41. Rubber plate; 5. Mesh plate; 6. Insulation layer. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 2 As shown in the embodiment of this utility model, a heat preservation device for the hydrogen refueling port of an on-board hydrogen system includes a delivery pipe 1; a housing 11 is fixedly connected to the middle of the delivery pipe 1; the housing 11 is sleeved on the interface at the end of the delivery pipe 1; a plurality of sliding grooves 12 are fixedly connected to the side wall of the housing 11; a screw 13 is threadedly connected to the sliding groove 12; a rotating seat 14 is rotatably connected to the end of the screw 13; a door plate 15 is fixedly connected to the end of the rotating seat 14; the door plate 15 and the end of the housing 11 are in sliding fit; during operation, when hydrogen needs to be delivered through the hydrogen refueling port of the on-board hydrogen system, the screw 13 is rotated first, and under the threaded fit between the screw 13 and the sliding groove 12, the two door plates 15 are pulled apart, and then the hydrogen refueling connector can be connected to the end of the delivery pipe 1. The parts are connected, and then the screw 13 is controlled to rotate in the opposite direction to close the two door plates 15. At this time, the door plates 15 can contact the middle of the hydrogen refueling connector, thus achieving a closed environment between the delivery pipeline 1 and the hydrogen refueling pipeline, reducing the influence of external temperature on the interface. After hydrogen refueling, the screw 13 is controlled to rotate to separate the two door plates 15, and then the hydrogen refueling pipe is separated from the delivery pipeline 1, thus ending the hydrogen refueling operation. By fitting a shell 11 and an openable and closable door plate 15 on the end of the delivery pipeline 1, the pipeline connected to the delivery pipeline 1 can be sealed, reducing direct contact with the outside air, reducing air flow, and achieving heat insulation of the delivery pipeline 1 and the connector connected to it, reducing the problem of large temperature changes and improving the stability of the connection.

[0025] like Figure 3 As shown, the side wall of the housing 11 has a vent 2 that penetrates the inside and outside of the housing 11; a connecting pipe 21 is connected to the middle of the vent 2; during operation, after the delivery pipeline 1 is connected to the hydrogen refueling pipeline and the door panel 15 is closed, the connecting pipe 21 can be connected to the vacuum pump, and then the vacuum pump is turned on to extract the gas inside the housing 11 through the vent 2 and the connecting pipe 21, thereby reducing the air content inside the housing 11; by providing a connecting pipe 21 on the side wall of the housing 11 that can extract the gas inside the housing 11, the air content at the end of the delivery pipeline 1 can be further reduced when the housing 11 is used for heat preservation, which can reduce the intrusion of environmental heat and significantly reduce the loss of liquid hydrogen vaporization; this setting can further improve the heat preservation effect of the delivery pipeline 1 and its end hydrogen refueling pipeline.

[0026] like Figure 5 As shown, multiple sealing pieces 3 are fixed to the side walls of the two door panels 15 that are close to each other; a sealing groove 31 is opened on the side wall of the door panel 15; a sealing strip 32 is fixed to the side wall of the door panel 15; when the two door panels 15 are closed, the sealing strip 32 can be inserted into the sealing groove 31; during operation, by providing the sealing piece 3, when the two door panels 15 are closed, the sealing piece 3 can fit against the middle of the hydrogenation pipeline, reducing the possibility of external gas leaking into the housing 11 through the gap between the door panel 15 and the pipeline after the door panel 15 is closed. At the same time, by providing the sealing groove 31 and the sealing strip 32, after the two door panels 15 are closed, the sealing strip 32 can be inserted into the sealing groove 31 of the other door panel 15, achieving further sealing after the door panel 15 is closed, reducing the problem of air entering the housing 11.

[0027] like Figures 4 to 5 As shown, a limiting plate 4 is fixedly connected to the side wall of the door panel 15; the limiting plate 4 is semi-circular; multiple rubber plates 41 are fixedly connected to the inner side wall of the limiting plate 4; by providing a limiting plate 4 on the side wall of the door panel 15, the two limiting plates 4 will also contact when the two door panels 15 are closed. At this time, the rubber plates 41 inside the limiting plate 4 will close simultaneously. At this time, the rubber plates 41 can fit against the middle of the hydrogen delivery pipeline. At the same time, according to the deformation of the rubber plates 41 themselves, the contact area with the pipeline is increased, thereby further improving the sealing performance after the door panel 15 is closed and reducing the problem of air entering the interior of the shell 11, which would affect the ambient temperature around the delivery pipeline 1.

[0028] like Figures 4 to 5 As shown, a mesh plate 5 is fixed to the inner wall of the housing 11; the mesh plate 5 covers the vent hole 2; by providing a mesh plate 5 at the end of the vent hole 2, the problem of impurities entering the vent hole 2 and the connecting pipe 21 inside the housing 11, which affects the air delivery rate of the vent hole 2 and the connecting pipe 21, can be reduced, and the problem of blockage of the vent hole 2 and the connecting pipe 21 can be reduced.

[0029] like Figure 3 As shown, a heat insulation layer 6 is fixed to the side wall of the shell 11; by providing a heat insulation layer 6 on the outer wall of the shell 11, the temperature inside the shell 11 can be further stabilized and the temperature change inside the shell 11 can be reduced.

[0030] The working principle is as follows: When hydrogen needs to be supplied through the hydrogen refueling port of the on-board hydrogen system, first rotate the screw 13. With the screw 13 and the slide groove 12 in thread engagement, pull the two door plates 15 apart, and then connect the hydrogen refueling connector to the end of the delivery pipe 1. Then, control the screw 13 to rotate in the opposite direction to close the two door plates 15. At this time, the door plates 15 can contact the middle of the hydrogen refueling connector pipe, thus achieving a closed environment between the delivery pipe 1 and the hydrogen refueling pipe, reducing the influence of external temperature on the interface. After hydrogen refueling is completed, control the screw 13 to rotate again to separate the two door plates 15, and then separate the hydrogen refueling pipe from the delivery pipe 1, thus ending the hydrogen refueling operation. After the delivery pipe 1 is connected to the hydrogen refueling pipe and the door plates 15 are closed, the connecting pipe 21 can be connected to the vacuum pump. Then, turn on the vacuum pump to allow the gas inside the housing 11 to pass through the vent 2 and the connecting pipe 2. 1. Extraction reduces the air content inside the shell 11. A sealing plate 3 is provided, which, when the two door panels 15 are closed, adheres to the middle of the hydrogen supply pipeline, reducing the leakage of external gas into the shell 11 through the gap between the door panels 15 and the pipeline. A limiting plate 4 is provided on the side wall of the door panels 15, ensuring contact between the two limiting plates 4 when the two door panels 15 are closed. At this time, the rubber plate 41 inside the limiting plate 4 also closes, adhering to the middle of the hydrogen supply pipeline. The deformation of the rubber plate 41 increases the contact area with the pipeline. A mesh plate 5 at the end of the vent 2 reduces the entry of impurities into the vent 2 and connecting pipe 21 from inside the shell 11. An insulation layer 6 is provided on the outer wall of the shell 11 to further stabilize the internal temperature and reduce temperature fluctuations inside the shell 11.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat preservation device for the hydrogen refueling port of an on-board hydrogen system, characterized in that: It includes a conveying pipe (1); a housing (11) is fixedly connected to the middle of the conveying pipe (1); the housing (11) is fitted onto the interface at the end of the conveying pipe (1); a plurality of sliding grooves (12) are fixedly connected to the side wall of the housing (11); a screw (13) is threadedly connected to the sliding groove (12); a rotating seat (14) is rotatably connected to the end of the screw (13); a door panel (15) is fixedly connected to the end of the rotating seat (14); the door panel (15) and the end of the housing (11) are in sliding fit.

2. The heat preservation device for the hydrogen refueling port of an on-board hydrogen system according to claim 1, characterized in that: The side wall of the housing (11) is provided with a vent hole (2) that penetrates the inside and outside of the housing (11); a connecting pipe (21) is connected in the middle of the vent hole (2).

3. The heat preservation device for the hydrogen refueling port of an on-board hydrogen system according to claim 2, characterized in that: Multiple sealing pieces (3) are fixed to the side walls of the two door panels (15) that are close to each other; a sealing groove (31) is provided on the side wall of the door panel (15); a sealing strip (32) is fixed to the side wall of the door panel (15); when the two door panels (15) are closed, the sealing strip (32) can be inserted into the sealing groove (31).

4. The heat preservation device for the hydrogen refueling port of an on-board hydrogen system according to claim 3, characterized in that: A limiting plate (4) is fixedly connected to the side wall of the door panel (15); the limiting plate (4) is semi-circular; and multiple rubber plates (41) are fixedly connected to the inner side wall of the limiting plate (4).

5. The heat preservation device for the hydrogen refueling port of an on-board hydrogen system according to claim 4, characterized in that: A mesh plate (5) is fixed to the inner wall of the housing (11); the mesh plate (5) covers the vent (2).

6. The heat preservation device for the hydrogen refueling port of an on-board hydrogen system according to claim 1, characterized in that: The side wall of the shell (11) is fixed with a thermal insulation layer (6).

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