Mounting flange for liquid hydrogen pump

Abstract

The present application discloses a mounting flange for a liquid hydrogen pump, which comprises: a flange body, the flange body is provided with a center hole, the opposite sides of the center hole are provided with a driving channel and an output channel, the output channel is provided with a delivery pipe; at least one heat-insulating groove, at least one of the heat-insulating grooves is provided on the flange body, at least part of the heat-insulating groove is provided between the center hole and the output channel. The present application discloses a mounting flange for a liquid hydrogen pump, which solves the problem of the influence of excessive cooling of the mounting flange on the driving end when the existing liquid hydrogen pump outputs liquid hydrogen.

Description

Technical Field

[0001] The present application relates to the technical field of drive equipment, and more specifically, to a mounting flange for a liquid hydrogen pump. Background Art

[0002] Liquid hydrogen and gaseous hydrogen are different states of hydrogen. Liquid hydrogen is more suitable for large-scale, long-distance transportation than gaseous hydrogen, and is also more suitable for storage in large hydrogen refueling stations. Liquid hydrogen has the advantages of high hydrogen storage density, low storage and transportation costs, low storage pressure, and high safety performance.

[0003] The process flow of a liquid hydrogen storage hydrogen refueling station includes a liquid hydrogen storage tank, a liquid hydrogen pump, a high-pressure vaporizer, a high-pressure gas hydrogen buffer tank, and a hydrogenator. Among them, the liquid hydrogen pump is installed in the liquid hydrogen storage tank. Liquid hydrogen pumps are divided into external and submerged types. The external liquid hydrogen pump is installed on the outside of the liquid hydrogen storage tank and connected to the liquid hydrogen storage tank through a liquid hydrogen transmission pipeline to achieve the transportation of liquid hydrogen. The submerged liquid hydrogen pump includes a hydraulic end and a driving end. The hydraulic end is installed inside the liquid hydrogen storage tank and immersed in liquid hydrogen. It is responsible for the compression and transportation of liquid hydrogen through the liquid hydrogen transmission pipeline; the driving end is installed on the outside of the liquid hydrogen storage tank. The liquid hydrogen storage tank is an insulated storage tank with a double-wall, vacuum multi-layer insulation structure. The inner tank of the liquid hydrogen storage tank can expand within a certain range. Therefore, it is best not to pass the liquid hydrogen transmission pipeline through the tank wall, but through the mounting flange of the liquid hydrogen pump. The low-temperature liquid hydrogen transport pipeline has a cooling effect on the mounting flange, but if the temperature is dropped too low, it can easily cause the components on the drive end at room temperature to freeze, causing the drive system to fail or malfunction.

[0004] Therefore, a mounting flange for a liquid hydrogen pump is needed to solve the above problems. Summary of the invention

[0005] In view of this, the purpose of the present application is to propose a mounting flange for a liquid hydrogen pump to solve the problem of the existing liquid hydrogen pump having an impact on the driving end due to excessive temperature drop of the mounting flange when outputting liquid hydrogen.

[0006] Based on the above purpose, the present application provides a mounting flange for a liquid hydrogen pump, comprising:

[0007] A flange body, wherein a central hole is provided on the flange body, a driving channel and an output channel are respectively provided on opposite sides of the central hole, and a delivery pipe is passed through the output channel;

[0008] At least one heat-insulating groove is provided on the flange body, and at least part of the heat-insulating groove is provided between the central hole and the output channel.

[0009] Optionally, the heat-insulating groove is opposite to the conveying pipe and is spaced apart from each other, or / and the heat-insulating groove is arranged around the conveying pipe, or / and the heat-insulating groove is arranged around the conveying pipe.

[0010] Optionally, the depth of the thermal insulation groove is 1 / 6-5 / 6 of the thickness of the flange body.

[0011] Optionally, the first channel opening of the driving channel is located on the top surface of the flange body, and the second channel opening of the driving channel is located on a side surface of the flange body away from the output channel or the top surface; the first channel opening of the output channel is located on the top surface of the flange body, and the second channel opening of the output channel is located on the bottom surface of the flange body.

[0012] Optionally, a minimum distance between the drive channel and the bottom surface of the flange body is greater than a minimum distance between the heat insulation groove and the bottom surface of the flange body.

[0013] Optionally, the minimum distance between the output channel and the center hole is greater than the minimum distance between the drive channel and the center hole, and the minimum distance between the heat insulation groove and the center hole is greater than the minimum distance between the drive channel and the center hole.

[0014] Optionally, the mounting flange for the liquid hydrogen pump further includes: at least one heat conducting plate, which is arranged on the flange body and at least partially extends toward a side away from the flange body.

[0015] Optionally, at least one mounting groove is provided on the flange body, the notch of the mounting groove is provided on the top surface of the flange body, the distance between the mounting groove and the center hole is smaller than the distance between the heat insulation groove and the center hole, and the heat conducting sheet is inserted into the mounting groove.

[0016] Optionally, the heat conducting sheet is at least partially attached to the flange body and extends toward a side away from the flange body after being bent.

[0017] In addition, optionally, the mounting flange for the liquid hydrogen pump further includes: at least one thermal insulation layer, and the thermal insulation layer is arranged between the heat conductive sheet and the output channel.

[0018] From the above, it can be seen that the mounting flange for the liquid hydrogen pump provided in the present application has the following advantages compared with the prior art: by using the above-mentioned mounting flange for the liquid hydrogen pump, the heat insulation groove separates the heat transfer between the center hole and the delivery pipe, and the heat insulation effect provided by the heat insulation groove can reduce the heat transfer from the delivery pipe to the flange body on the other side of the center hole, thereby avoiding the low temperature influence range of the liquid hydrogen in the delivery pipe from spreading to the drive end, thereby ensuring that the temperature of the drive end is above the required temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above-mentioned features and technical advantages of the present application will become clearer and easier to understand through the following description of its embodiments in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic longitudinal section diagram of the mounting flange for the liquid hydrogen pump used in the first embodiment of the present application.

[0021] Figure 2 This is a schematic cross-sectional view of a mounting flange for a liquid hydrogen pump used in the second embodiment of the present application.

[0022] Figure 3 This is a schematic cross-sectional view of a mounting flange for a liquid hydrogen pump used in the third embodiment of the present application.

[0023] Figure 4 This is a schematic cross-sectional view of a mounting flange for a liquid hydrogen pump used in the fourth embodiment of the present application.

[0024] Figure 5 It is a schematic longitudinal section diagram of the mounting flange for the liquid hydrogen pump used in the fifth embodiment of the present application.

[0025] Figure 6 It is a schematic longitudinal section diagram of the mounting flange for the liquid hydrogen pump used in the sixth embodiment of the present application.

[0026] Figure 7 for Figure 6 A schematic cross-sectional view of a mounting flange for a liquid hydrogen pump is shown.

[0027] Figure 8 for Figure 6 Another cross-sectional schematic diagram of a mounting flange for a liquid hydrogen pump is shown.

[0028] Fig. 9 It is a schematic longitudinal section diagram of the mounting flange for the liquid hydrogen pump used in the seventh embodiment of the present application.

[0029] Fig.10 It is a schematic longitudinal section diagram of the mounting flange for the liquid hydrogen pump used in the eighth embodiment of the present application.

[0030] The reference numerals are:

[0031] 1. Flange body; 2. Insulation groove; 3. Delivery pipe; 4. Center hole; 5. Drive channel; 6. Heat conducting sheet; 7. Insulation layer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. The same parts are represented by the same figure numerals. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings. The words "inside" and "outside" used refer to the direction toward or away from the geometric center of a specific component, respectively.

[0033] Figure 1 Schematic diagram of the longitudinal section of the mounting flange for the liquid hydrogen pump used in the first embodiment of the present application. Figure 1 As shown, the mounting flange for the liquid hydrogen pump includes a flange body 1 and at least one thermal insulation groove 2.

[0034] The flange body 1 is provided with a central hole 4, and a driving channel 5 and an output channel are respectively provided on opposite sides of the central hole 4, and a delivery pipe 3 is passed through the output channel;

[0035] At least one heat-insulating groove 2 is arranged on the flange body 1 , and at least a part of the heat-insulating groove 2 is arranged between the central hole 4 and the output channel.

[0036] The flange body 1 is installed at the opening of the liquid hydrogen storage tank. The lower part of the flange body 1 is the jacket of the liquid hydrogen storage tank. The fitting is inserted into the flange body 1 through the center hole 4. The driving channel is used to transport the driving liquid and is connected to the driving end. The delivery pipe 3 is inserted into the output channel. The delivery pipe 3 is used to output liquid hydrogen. The heat insulation groove 2 isolates the heat transfer between the center hole 4 and the delivery pipe 3 to prevent the low temperature influence range of the liquid hydrogen in the delivery pipe 3 from spreading to the driving end.

[0037] By using the above-mentioned mounting flange for the liquid hydrogen pump, the heat insulation groove 2 separates the heat transfer between the center hole 4 and the delivery pipe 3. The heat insulation provided by the heat insulation groove 2 can reduce the heat transfer from the delivery pipe 3 to the flange body 1 on the other side of the center hole 4, avoid the low temperature influence range of the liquid hydrogen in the delivery pipe 3 from spreading to the driving end, and ensure that the temperature of the driving end is above the required temperature.

[0038] In one embodiment of the present application, the flange body 1 includes but is not limited to a cylindrical structure, a cubic structure, a rectangular parallelepiped structure, etc.

[0039] In one embodiment of the present application, the center hole 4 is arranged at the center of the flange body 1. Usually, the cross-section of the center hole 4 includes but is not limited to a circular shape. The center hole 4 is arranged to penetrate along the axial direction (ie, thickness direction) of the flange body 1.

[0040] In one embodiment of the present application, a driving channel 5 is provided on the right side of the center hole 4, and an output channel is provided on the right side of the center hole 4. The output channel is arranged through the axial direction of the flange body 1, and the delivery pipe 3 is passed through the output channel and welded to the flange body 1. The welding point can be arranged on the top surface and / or the bottom surface of the flange body 1.

[0041] In one embodiment of the present application, the number of the insulation grooves 2 is at least one, typically one to three, and the insulation grooves 2 can extend from the top surface to the bottom surface, and / or can extend from the bottom surface to the top surface, but typically at least one notch of the insulation groove 2 is disposed on the top surface of the flange body 1.

[0042] In one embodiment of the present application, the shape of the heat insulation groove 2 includes but is not limited to a straight line, an arc, an annular shape, a semi-annular shape, etc. When the heat insulation groove 2 is in a straight line, an arc, or a semi-annular shape, the heat insulation groove 2 is arranged between the center hole 4 and the delivery pipe 3. When the heat insulation groove 2 is in an annular shape, the annular shape surrounds the delivery pipe 3, so the partial heat insulation groove 2 is arranged between the center hole 4 and the delivery pipe 3.

[0043] In order to improve the flexibility of the flange body 1 , optionally, the heat insulation groove 2 is opposite to the delivery pipe 3 and is arranged at a distance, or / and the heat insulation groove 2 is arranged around the delivery pipe 3 , or / and the heat insulation groove 2 is arranged around the delivery pipe 3 .

[0044] like Figure 1 As shown, in one embodiment of the present application, the number of the heat insulation grooves 2 is three, and the three heat insulation grooves 2 are respectively arranged on opposite sides of the delivery pipe 3, wherein two heat insulation grooves 2 are arranged at intervals on the left side of the delivery pipe 3, and the remaining heat insulation groove 2 is arranged on the right side of the delivery pipe 3. The three heat insulation grooves 2 have the same structure, and the heat insulation grooves 2 all extend from the top surface of the flange body 1 to the bottom surface side, and do not penetrate. The groove bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 than the bottom of the driving channel 5.

[0045] like Figure 2 As shown, in one embodiment of the present application, the number of the heat insulation groove 2 is one, which is in a circular shape, and the heat insulation groove 2 is arranged around the delivery pipe 3, and the two are concentric. The heat insulation groove 2 extends from the top surface of the flange body 1 to the bottom surface side, and does not penetrate. The groove bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 than the bottom of the driving channel 5.

[0046] like Figure 3 As shown, in one embodiment of the present application, the number of the heat insulation groove 2 is one, which is semi-annular, and the heat insulation groove 2 is arranged between the central hole 4 and the delivery pipe 3, and the heat insulation groove 2 is arranged half around the delivery pipe 3, and the two are concentric. The heat insulation groove 2 extends from the top surface of the flange body 1 to the bottom surface side, and does not penetrate. The groove bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 than the bottom of the driving channel 5.

[0047] like Figure 4 As shown, in one embodiment of the present application, the number of the heat insulation groove 2 is one, which is in the shape of an arc. The heat insulation groove 2 is arranged between the central hole 4 and the delivery pipe 3, and the heat insulation groove 2 is arranged around the delivery pipe 3. The heat insulation groove 2 is located at the center of the line connecting the two ends of the arc, and the distance between the two ends of the arc is greater than the diameter of the central hole 4. The heat insulation groove 2 extends from the top surface of the flange body 1 to the bottom surface side, and does not penetrate. The bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 than the bottom of the drive channel 5.

[0048] like Figure 5As shown, in one embodiment of the present application, there are three heat insulation grooves 2, which are respectively arranged on opposite sides of the delivery pipe 3 and respectively located on opposite sides of the flange body 1, wherein two heat insulation grooves 2 are arranged at intervals on the left side of the delivery pipe 3, wherein the heat insulation groove 2 close to the central hole 4 extends from the top surface of the flange body 1 to the bottom surface side, and does not penetrate, and the groove bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 relative to the bottom of the driving channel 5. The heat insulation groove 2 close to the delivery pipe 3 and the heat insulation groove 2 arranged on the right side of the delivery pipe 3 both extend from the bottom surface of the flange body 1 to the top surface side, and do not penetrate.

[0049] When the heat insulation groove 2 is provided, both the barrier effect and the strength requirement of the flange body 1 should be considered. Optionally, the depth of the heat insulation groove 2 is 1 / 6-5 / 6 of the thickness of the flange body 1. When a plurality of heat insulation grooves 2 are provided on the flange body 1, the depths of the heat insulation grooves 2 can be set to be the same or different.

[0050] In one embodiment of the present application, when three heat-insulating grooves 2 are provided on the flange body 1, the three heat-insulating grooves 2 have the same depth and extend from the top surface to the bottom surface of the flange body 1. And the three heat-insulating grooves 2 are spaced a certain distance apart, which is about 2-3 times the width of the heat-insulating groove 2.

[0051] In another embodiment of the present application, when three heat-insulating grooves 2 are provided on the flange body 1, they can be respectively provided to extend from the top surface of the flange body 1 to the bottom surface, and from the bottom surface of the flange body 1 to the top surface. In this case, the heat-insulating grooves 2 with different directions can also have different depths. The depth of the heat-insulating groove 2 with the notch on the bottom surface can be lower than the depth of the heat-insulating groove 2 with the notch on the top surface.

[0052] Typically, the heat insulation groove 2 can extend from the top surface to the bottom surface, and / or can extend from the bottom surface to the top surface. Optionally, the first channel opening of the drive channel 5 is located on the top surface of the flange body 1, and the second channel opening of the drive channel 5 is located on a side surface or top surface of the flange body 1 away from the output channel. The first channel opening of the output channel is located on the top surface of the flange body, and the second channel opening of the output channel is located on the bottom surface of the flange body. Typically, the drive channel 5 extends from the middle and lower part of the flange body 1 to the upper part, and the output channel is arranged to penetrate along the axial direction of the flange body 1.

[0053] In one embodiment of the present application, a driving channel 5 is arranged on the left side of the center hole 4, and a first channel opening of the driving channel 5 is located on the top surface of the flange body 1, and a second channel opening of the driving channel 5 is located on the left side surface of the flange body 1. Usually, the longitudinal section of the driving channel 5 is a right-angle type, that is, the driving channel 5 includes vertical sections and horizontal sections that are interconnected, the vertical sections are opposite to the center hole 4 and are arranged at intervals, and the horizontal sections are arranged in the lower middle part of the thickness direction of the flange body 1, and the free end of the horizontal section extends along the side away from the center hole 4.

[0054] Optionally, the minimum distance between the drive channel 5 and the bottom surface of the flange body 1 is greater than the minimum distance between the insulation groove 2 and the bottom surface of the flange body 1. The drive channel 5 includes a horizontal section and a vertical section that are interconnected, the bottom edge of the horizontal section is closest to the bottom surface of the flange body 1, the bottom of the insulation groove 2 is closest to the bottom surface of the flange body 1, and the depth of the insulation groove 2 covers the depth of the horizontal section, so that the insulation groove 2 can provide effective heat transfer blocking and inhibit further diffusion of the temperature reduction range.

[0055] In one embodiment of the present application, the distance between the drive channel 5 and the bottom surface of the flange body 1 is approximately 1 / 4 of the thickness of the flange body 1 , and the distance between the insulation groove 2 and the bottom surface of the flange body 1 is approximately 1 / 5 of the thickness of the flange body 1 .

[0056] Optionally, the minimum distance between the output channel and the center hole 4 is greater than the minimum distance between the drive channel 5 and the center hole 4, and the minimum distance between the heat insulation groove 2 and the center hole 4 is greater than the minimum distance between the drive channel 5 and the center hole 4. The drive channel 5 includes a horizontal section and a vertical section that are interconnected, the side of the vertical section is closest to the center hole 4, and the side wall of the heat insulation groove 2 is closest to the center hole 4. By setting the positions of the output channel and the drive channel 5, the distance between the output channel and the drive channel 5 is increased, so that the delivery pipe 3 is arranged on the side farthest from the drive channel, thereby reducing the temperature impact of the output channel on the drive channel 5. In addition, the heat insulation groove 2 between the center hole 4 and the output channel further reduces the temperature impact of the delivery channel on the outside.

[0057] In one embodiment of the present application, the distance between the output channel and the center hole 4 is approximately 1 / 6 of the diameter of the flange body 1 , and the distance between the insulation groove 2 and the center hole 4 is approximately 1 / 2 or 2 / 3 of the diameter of the flange body 1 .

[0058] In one embodiment of the present application, the output channel is arranged close to the right side of the flange body 1, the distance between the first channel opening of the driving channel 5 and the center hole 4 is smaller than the distance between the output channel and the center hole 4, and the distance between the second channel opening of the driving channel 5 and the center hole 4 is greater than the distance between the output channel and the center hole 4.

[0059] In one embodiment of the present application, the heat insulation groove 2 is arranged near the left side of the output channel, the distance between the first channel opening of the driving channel 5 and the center hole 4 is smaller than the distance between the heat insulation groove 2 and the center hole 4, and the distance between the second channel opening of the driving channel 5 and the center hole 4 is larger than the distance between the heat insulation groove 2 and the center hole 4. The heat insulation groove 2 is arranged as close to the output channel as possible to ensure the heat insulation effect.

[0060] Optionally, the mounting flange for the liquid hydrogen pump further includes: at least one heat conducting sheet 6, which is arranged on the flange body 1 and at least partially extends toward the side away from the flange body 1. The heat conducting sheet 6 extending toward the side away from the flange body 1 is exposed to the environment, and this section of the heat conducting sheet 6 absorbs the heat in the environment, and promptly transfers the heat in the external environment to the heat conducting sheet 6 on the flange body 1, and then transfers the heat to the flange body 1 through the heat conducting sheet 6, thereby increasing the temperature of the flange body 1, neutralizing the cooling effect provided by the delivery pipe 3, reducing the cooling effect of the delivery pipe 3 on the drive channel 5, and ensuring that the temperature of the drive end is maintained above the required temperature, that is, closer to the external environment temperature.

[0061] In one embodiment of the present application, the number of the heat conducting sheet 6 is usually one, and may also be multiple according to the specific heat requirement. The multiple heat conducting sheets 6 may be sequentially arranged at intervals between the central hole 4 and the delivery tube 3, or arranged in an array.

[0062] In one embodiment of the present application, the heat conductive sheet 6 includes but is not limited to heat dissipating fins. The heat dissipating fins may be made of aluminum fins, which have high thermal conductivity. The heat dissipating fins may also be made of other materials with high thermal conductivity.

[0063] In one embodiment of the present application, the heat conducting sheet 6 is arranged between the center hole 4 and the delivery tube 3, the distance between the heat conducting sheet 6 and the delivery tube 3 is smaller than the distance between the heat conducting sheet 6 and the center hole 4, and the heat conducting sheet 6 is arranged as close to the delivery tube 3 as possible to avoid further spread of the cooling effect of the delivery tube 3.

[0064] In one embodiment of the present application, the distance between the heat conductive sheet 6 and the center hole 4 is not greater than the distance between the heat insulating groove 2 and the center hole 4. Through the heat insulating effect of the heat insulating groove 2, the temperature drop range is prevented from spreading to the center hole 4, and the heat conductive sheet 6 provides temperature compensation to further ensure the problem of the flange body 1 and avoid the influence on the drive channel 5. In addition, the heat insulating groove 2 is arranged between the heat conductive sheet 6 and the conveying pipe 3. The heat insulating effect provided by the heat insulating groove 2 makes the heat absorbed by the heat conductive sheet 6 tend to be transferred to one side of the center hole 4, providing temperature compensation for the drive channel 5.

[0065] In one embodiment of the present application, the heat conducting sheet 6 includes but is not limited to a straight line type, an arc type, etc. If a straight line type or an arc type is used, a portion of the heat conducting sheet 6 is inserted into the flange body 1, and the remaining portion extends to the external environment. When an arc type heat conducting sheet 6 is used, the arc center faces the delivery pipe. Generally, the length of the heat conducting sheet 6 is greater than the diameter of the delivery pipe, usually 2-3 times, to ensure the heat conduction effect.

[0066] like Figure 6 , Figure 7As shown, in one embodiment of the present application, there are three heat insulation grooves 2, which are respectively arranged on opposite sides of the delivery pipe 3, wherein two heat insulation grooves 2 are arranged at intervals on the left side of the delivery pipe 3, and the remaining heat insulation groove 2 is arranged on the right side of the delivery pipe 3. The three heat insulation grooves 2 extend from the top surface to the bottom surface of the flange body 1 and are not through. A heat conducting sheet 6 is arranged in the heat insulation groove 2 closest to the center hole 4.

[0067] Figure 8 and Figure 7 The difference is that, in another embodiment of the present application, the shape of the heat conducting sheet 6 is different, and the shape of the heat insulating groove 2 for installing the heat conducting sheet 6 is different, such as Figure 7 As shown, the cross section of the heat conducting sheet 6 is linear, and the heat conducting sheet 6 is interference fit with the heat insulating groove 2. Figure 8 As shown, the cross section of the heat conducting sheet 6 is arc-shaped. Similarly, the heat conducting sheet 6 and the heat insulating groove 2 are interference fit.

[0068] like Fig. 9 As shown, in one embodiment of the present application, there are three heat insulation grooves 2, which are respectively arranged on opposite sides of the delivery pipe 3 and respectively located on opposite sides of the flange body 1, wherein two heat insulation grooves 2 are arranged at intervals on the left side of the delivery pipe 3, wherein the heat insulation groove 2 close to the central hole 4 extends from the top surface of the flange body 1 to the bottom surface, and does not penetrate, and a heat conducting sheet 6 is installed in the heat insulation groove 2. The heat insulation groove 2 close to the delivery pipe 3 and the heat insulation groove 2 arranged on the right side of the delivery pipe 3 both extend from the bottom surface of the flange body 1 to the top surface, and do not penetrate.

[0069] The heat conducting sheet 6 can be installed in the heat insulating groove 2, or a separate installation groove for installing the heat conducting sheet 6 can be opened on the flange body 1. Optionally, at least one installation groove is provided on the flange body 1, and the notch of the installation groove is provided on the top surface of the flange body 1, and the distance between the installation groove and the center hole 4 is smaller than the distance between the heat insulating groove 2 and the center hole 4, and the heat conducting sheet 6 is inserted into the installation groove. The installation groove can adopt the heat insulating groove 2 closest to the center hole 4, or it can be opened separately. The heat conducting sheet 6 is partially inserted into the installation groove, and the remaining part of the heat conducting sheet 6 is exposed to the external environment through the notch, so that the installation groove is closer to the center hole 4 and the driving channel 5 relative to the heat insulating groove 2, so that the heat absorption and heat conduction of the heat conducting sheet 6 can neutralize the cooling effect provided by the conveying pipe 3, and the heat of the heat conducting sheet 6 can be transferred to the driving channel 5 in time, thereby reducing the cooling effect on the driving channel 5.

[0070] The heat conducting sheet 6 is inserted into the heat insulating groove 2 or the installation groove, and the length of the heat conducting sheet 6 extending outside the groove is greater than the length inserted into the groove. Usually, the insertion depth of the heat conducting sheet 6 is not greater than 1 / 2 of the length of the heat conducting sheet 6. The length of the heat conducting sheet 6 exposed outside the flange body 1 is greater than the length of the heat conducting sheet 6 inserted into the flange body 1. Usually, 1 / 3 of the heat conducting sheet 6 is inserted into the flange body 1, and 2 / 3 of the heat conducting sheet 6 is exposed to the environment. The heat conducting sheet 6 exposed to the environment absorbs the heat in the environment in time, transfers the heat in the external environment to the heat conducting sheet 6 in the flange body 1 in time, and transfers the heat to the flange body 1 through the heat conducting sheet 6, thereby increasing the temperature of the flange body 1. By setting the installation position, the heat transfer effect can be guaranteed.

[0071] In order to further simplify the assembly process, the heat conducting sheet 6 is directly mounted on the surface of the flange body 1. Optionally, the heat conducting sheet 6 is at least partially attached to the flange body 1 and extends toward a side away from the flange body 1 after being bent. The heat conducting sheet 6 is partially attached to the top surface of the flange body 1 and extends toward the top of the flange body 1 after being bent.

[0072] In one embodiment of the present application, the heat conductive sheet 6 includes but is not limited to a right-angle type, an inverted T-shape, etc. If a right-angle type or an inverted T-shape is adopted, the horizontal section is fitted and connected to the flange body 1, and the vertical section extends to the external environment.

[0073] In addition, optionally, the mounting flange for the liquid hydrogen pump further includes: at least one insulation layer 7, which is arranged between the heat conductive sheet 6 and the output channel. The delivery pipe 3 and the drive channel 5 are respectively located on opposite sides of the insulation layer 7, and the insulation layer 7 provides a heat insulation effect, isolating the cooling effect of the delivery pipe 3 on the side of the heat conductive sheet 6 to prevent further diffusion to the side of the drive channel 5. By providing the insulation layer, the cooling effect of the delivery pipe 3 on the drive channel 5 is reduced, ensuring that the temperature of the drive end is maintained above the required temperature.

[0074] In one embodiment of the present application, the insulation layer 7 is arranged between the heat conductive sheet 6 and the conveying pipe 3, such as the insulation layer 7 is attached to the side of the heat conductive sheet 6 facing the conveying pipe 3, and the two share a heat insulation groove 2, or separate installation grooves for installing the heat conductive sheet 6 and the insulation layer 7 are opened on the flange body 1, or installation grooves are respectively set on the flange body 1 for the heat conductive sheet 6 and the insulation layer 7.

[0075] In one embodiment of the present application, the heat insulating layer 7 is filled with heat insulating material. The heat insulating layer 7 can be formed and then installed in the heat insulating groove 2 as an integral component. Alternatively, the heat insulating layer 7 can be directly filled with heat insulating material into the heat insulating groove 2 where the heat conductive sheet 6 is installed. Alternatively, the heat insulating layer 7 is directly formed on the heat conductive sheet 6, that is, the heat insulating layer 7 is arranged on the portion where the heat conductive sheet 6 is arranged in the installation groove or the heat insulating groove 2, and is located on the surface facing the side of the conveying pipe 3.

[0076] like Fig.10 As shown, in one embodiment of the present application, the number of the heat insulation groove 2 is one, and the heat insulation groove 2 is arranged between the central hole 4 and the conveying pipe 3. The heat insulation groove 2 extends from the top surface of the flange body 1 to the bottom surface side, and does not penetrate. The groove bottom of the heat insulation groove 2 is closer to the bottom surface of the flange body 1 relative to the bottom of the driving channel 5. The heat insulation groove 2 also serves as a mounting groove for the heat conductive sheet 6 and the heat insulating layer 7. The heat insulation groove 2 is sequentially mounted with the heat conductive sheet 6 and the heat insulating layer 7 from left to right, and the heat insulating layer 7 does not protrude from the surface of the flange body 1.

[0077] The following further introduces the use process of the mounting flange for the liquid hydrogen pump.

[0078] The flange body 1 is installed at the opening of the liquid hydrogen storage tank, and the lower part of the flange body 1 is the jacket of the liquid hydrogen storage tank. The fitting is penetrated through the flange body 1 through the center hole 4. The driving channel 5 is used to transport the driving liquid and is connected to the driving end. The delivery pipe 3 is penetrated through the output channel, and the delivery pipe 3 is used to output liquid hydrogen. The heat insulation groove 2 isolates the heat transfer between the center hole 4 and the delivery pipe. Multiple heat insulation grooves 2 can be set, which can be on the top surface and / or bottom surface of the flange body 1. The heat insulation groove 2 closest to the center hole 4 is set on the top surface of the flange body 1, and a heat conducting sheet 6 and a heat insulating layer 7 are installed. The heat conducting sheet 6 transfers the heat in the air to the flange body 1 to compensate for the temperature of the flange body 1. The heat insulating layer 7 provides a heat insulating effect, so that the heat transferred by the heat conducting sheet diffuses more to the side of the driving channel 5, and at the same time prevents the low temperature of the liquid hydrogen in the delivery pipe 3 from diffusing to the side of the driving channel 5. The heat insulation effect, the compensation temperature and the heat insulation effect jointly prevent the low temperature influence range of the liquid hydrogen in the delivery pipe from diffusing to the driving end.

[0079] From the above description and practice, it can be seen that the mounting flange for the liquid hydrogen pump provided in the present application has the following advantages compared with the prior art: using the above-mentioned mounting flange for the liquid hydrogen pump, the insulation groove separates the heat transfer between the center hole and the delivery pipe, and the insulation effect provided by the insulation groove can reduce the heat transfer from the delivery pipe to the flange body on the other side of the center hole, thereby avoiding the low temperature influence range of the liquid hydrogen in the delivery pipe from spreading to the drive end, and ensuring that the temperature of the drive end is above the required temperature.

[0080] A person skilled in the art should understand that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A mounting flange for a liquid hydrogen pump, It is characterized in that include: A flange body, wherein a central hole is provided on the flange body, a driving channel and an output channel are respectively provided on opposite sides of the central hole, and a delivery pipe is passed through the output channel; At least one heat-insulating groove, at least one of the heat-insulating grooves is arranged on the flange body, and at least a part of the heat-insulating groove is arranged between the central hole and the output channel; The mounting flange for the liquid hydrogen pump further comprises: at least one heat conducting sheet, which is arranged on the flange body and at least partially extends away from the flange body; At least one mounting groove is provided on the flange body, and the heat conducting sheet is inserted into the mounting groove and can extend into the external environment; The mounting flange for the liquid hydrogen pump further comprises: at least one heat insulating layer, the heat insulating layer being arranged between the heat conducting sheet and the output channel; The heat insulating layer is arranged on the portion of the heat conducting sheet arranged in the installation groove and is located on the surface facing the conveying pipe; The notch of the installation groove is arranged on the top surface of the flange body, and the distance between the installation groove and the center hole is smaller than the distance between the heat insulation groove and the center hole.

2. The mounting flange for a liquid hydrogen pump according to claim 1, Features: The heat-insulating groove is opposite to the conveying pipe and is arranged at a distance, or the heat-insulating groove is arranged around the conveying pipe, or the heat-insulating groove is arranged around the conveying pipe.

3. The mounting flange for a liquid hydrogen pump according to claim 1 or 2, Features: The depth of the heat insulation groove is 1 / 6-5 / 6 of the thickness of the flange body.

4. The mounting flange for a liquid hydrogen pump according to claim 1 or 2, Features: The first channel opening of the driving channel is located on the top surface of the flange body, and the second channel opening of the driving channel is located on the side of the flange body away from the output channel; the first channel opening of the output channel is located on the top surface of the flange body, and the second channel opening of the output channel is located on the bottom surface of the flange body.

5. The mounting flange for a liquid hydrogen pump according to claim 4, Features: The minimum distance between the driving channel and the bottom surface of the flange body is greater than the minimum distance between the heat insulation groove and the bottom surface of the flange body.

6. The mounting flange for a liquid hydrogen pump according to claim 1 or 2, Features: The minimum distance between the output channel and the center hole is greater than the minimum distance between the drive channel and the center hole, and the minimum distance between the heat insulation groove and the center hole is greater than the minimum distance between the drive channel and the center hole.

7. The mounting flange for a liquid hydrogen pump according to claim 1, Features: The heat conducting sheet is at least partially attached to the flange body and extends toward a side away from the flange body after being bent.

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