Valve box structure capable of preventing liquid empty phenomenon

Abstract

The invention discloses a valve box structure for preventing a liquid empty phenomenon, which belongs to the technical field of valve box structures, and comprises a container body for storing liquid hydrogen, and a regulation and control mechanism is arranged beside the container body; the regulation and control mechanism comprises a box body arranged beside the container body, a liquid outlet pipe connected with the container body, a water bath vaporizer arranged beside the box body and a connecting pipe connected with the water bath vaporizer, nitrogen is filled in the box body, the liquid outlet pipe is arranged in the box body, and the liquid outlet pipe is communicated with the connecting pipe. The liquid hydrogen storage and transportation device has the effects that liquid hydrogen in the liquid outlet pipeline is slowly exchanged with air, the phenomenon that the air is directly liquefied is effectively avoided, and the safety of liquid hydrogen storage and transportation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve box structures, and in particular to a valve box structure for preventing liquid emptying. Background Art

[0002] The main function of cryogenic insulated gas cylinders is to store and transport cryogenic liquid gases, such as liquid oxygen, liquid nitrogen, liquid argon, etc. They use special insulation design and materials to effectively reduce heat transfer and keep the gas in the bottle at a low temperature, thereby ensuring the stability and safety of these cryogenic liquids. Cryogenic insulated gas cylinders are widely used in many fields, including energy, medical care, and scientific research.

[0003] When storing and transporting liquid hydrogen, existing cryogenic insulated gas cylinders or containers are limited by equipment connections, and the inlet and outlet liquid pipelines are generally partially exposed to the air. The pipelines here will exchange heat with the air, causing the oxygen in the air to cool and change phase to liquid and flow around. The flowing liquid will quickly vaporize into gas after the heat exchange, rapidly increasing the pressure in the small space, which is dangerous and reduces the safety of storing and transporting liquid hydrogen.

[0004] In view of the above-mentioned related technologies, it is urgently necessary to design and develop a valve box structure that can prevent the liquid air phenomenon, so that the liquid hydrogen in the liquid outlet pipeline can be slowly exchanged with the air, effectively avoiding the phenomenon of direct liquefaction of air and improving the safety of storage and transportation of liquid hydrogen. Summary of the invention

[0005] In order to slowly exchange the liquid hydrogen in the liquid outlet pipeline with the air, effectively avoid the phenomenon of direct liquefaction of air, and improve the safety of storing and transporting liquid hydrogen, the present application provides a valve box structure that prevents the liquid air phenomenon.

[0006] The present application provides a valve box structure for preventing liquid emptying, which adopts the following technical solution: A valve box structure for preventing liquid empty phenomenon comprises a container body for storing liquid hydrogen, a regulating mechanism is arranged beside the container body, the regulating mechanism comprises a box body arranged beside the container body, a liquid outlet pipe connected to the container body, a water bath vaporizer arranged beside the box body and a connecting pipe connected to the water bath vaporizer, the box body is filled with nitrogen, the liquid outlet pipe is arranged in the box body, and the liquid outlet pipe is communicated with the connecting pipe.

[0007] By adopting the above technical solution, the box body is arranged beside the container body, the box body is filled with nitrogen, the liquid outlet pipe is arranged in the box body, the liquid outlet pipe is connected to the container body, the water bath vaporizer is arranged beside the box body, the connecting pipe is connected to the water bath vaporizer, the liquid outlet pipe is communicated with the connecting pipe, and hydrogen flows from the container body to the use end via the liquid outlet pipe, the connecting pipe, and the water bath vaporizer. When the cold liquid hydrogen flows through the box body, it first fully performs convection heat exchange with the nitrogen in the box body, so that the medium temperature in the liquid outlet pipe is higher than the boiling point of liquid nitrogen, and the liquid air phenomenon after the liquid hydrogen leaves the box body in the liquid outlet pipe will not occur.

[0008] Preferably, the regulating mechanism includes a heat conducting wave plate 1 arranged below the liquid outlet pipe and a heat conducting wave plate 2 arranged below the heat conducting wave plate 1, the heat conducting wave plate 1 is arranged in the box body, the heat conducting wave plate 2 is arranged in the box body, there is a gap between the side of the heat conducting wave plate 1 away from the container body and the inner wall of the box body, there is a gap between the side of the heat conducting wave plate 2 away from the container body and the inner wall of the box body, and guide grooves are provided on the top and bottom surfaces of the heat conducting wave plate 1 and the heat conducting wave plate 2.

[0009] By adopting the above technical solution, the first heat-conducting wave plate is arranged in the box body, the first heat-conducting wave plate is arranged below the liquid outlet pipe, the second heat-conducting wave plate is arranged in the box body, the second heat-conducting wave plate is arranged below the first heat-conducting wave plate, there is a gap between the side of the first heat-conducting wave plate away from the container body and the inner wall of the box body, there is a gap between the side of the second heat-conducting wave plate away from the container body and the inner wall of the box body, and the top and bottom surfaces of the first heat-conducting wave plate and the second heat-conducting wave plate are provided with guide grooves. Due to sufficient convection heat exchange, when the nitrogen temperature in the box is lower than the boiling point, the phase change liquid The liquid nitrogen in the box is evaporated and rises to wrap around the liquid outlet pipe to exchange heat with the medium in the liquid outlet pipe again, so as to achieve the purpose of heat exchange without energy loss of the medium in the liquid outlet pipe.

[0010] Preferably, the box body includes a head arranged beside the container body, an arc plate arranged on the head, a partition arranged in the arc plate, a cover plate arranged on the partition and a side plate connected to the cover plate, the partition is connected to the cover plate, the side plate is arranged in the arc plate, the partition is connected to the side plate, the partition divides the box body into a first sealed cavity and a second sealed cavity, the liquid outlet pipe, the first heat conduction wave plate and the second heat conduction plate are arranged in the second sealed cavity, the second sealed cavity is filled with nitrogen, a through hole is opened on the top surface of the cover plate, a transfer tube is arranged on the cover plate, one end of the transfer tube extends into the second sealed cavity, the transfer tube is connected to the liquid outlet pipe, the other end of the transfer tube extends out of the second sealed cavity, and the transfer tube is connected to the connecting pipe.

[0011] By adopting the above technical scheme, the box body includes a head, an arc plate, a partition, a cover plate and a side plate. The head is arranged beside the container body, the arc plate is arranged on the head, the partition is arranged in the arc plate, the cover plate is arranged on the partition, the side plate is connected to the cover plate, the partition is connected to the cover plate, the side plate is arranged in the arc plate, the partition is connected to the side plate, the partition divides the box body into a first sealed cavity and a second sealed cavity, the liquid outlet pipe, the first heat conduction wave plate and the second heat conduction plate are arranged in the second sealed cavity, the second sealed cavity is filled with nitrogen, a through hole is opened on the top surface of the cover plate, a transfer pipe is arranged on the cover plate, one end of the transfer pipe extends into the second sealed cavity, the transfer pipe is connected to the liquid outlet pipe, the other end of the transfer pipe extends out of the second sealed cavity, and the transfer pipe is connected to the connecting pipe, thereby improving the sealing performance of the box body.

[0012] Preferably, a vacuum design is adopted in the first sealed cavity, and a liquid adding tube and a liquid inlet tube are arranged in the first sealed cavity, the liquid adding tube extends out of the first sealed cavity, the liquid adding tube can be connected to an external liquid supply device, the liquid inlet tube is connected to the liquid adding tube, the liquid inlet tube extends out of the first sealed cavity, and the liquid inlet tube is connected to the container body.

[0013] By adopting the above technical scheme, a vacuum design is adopted in the first sealed cavity, a liquid adding pipe and a liquid inlet pipe are arranged in the first sealed cavity, the liquid adding pipe extends out of the first sealed cavity, the liquid adding pipe can be connected to an external liquid supply device, the liquid inlet pipe is connected to the liquid adding pipe, the liquid inlet pipe extends out of the first sealed cavity, the liquid inlet pipe is connected to the container body, and the closed cavity where the liquid inlet pipe is located is designed to be a vacuum, thereby reducing the heat exchange opportunity during the liquid inlet process and ensuring the cooling capacity of the liquid inlet medium.

[0014] Preferably, an extension tube 1 is provided in the first sealed cavity, the extension tube 1 is connected with the liquid inlet tube, the extension tube 1 is connected with the liquid adding tube, the extension tube 1 extends out of the cover plate, a stop valve 1 is provided on the extension tube, and the stop valve 1 is located above the cover plate.

[0015] By adopting the above technical solution, an extension tube 1 is arranged in the first sealed cavity, the extension tube 1 is connected with the liquid inlet tube, the extension tube 1 is connected with the liquid adding tube, the extension tube 1 extends out of the cover plate, and a stop valve 1 is arranged on the extension tube, the stop valve 1 is located above the cover plate, and whether liquid hydrogen enters the container body for temporary storage can be controlled by regulating the opening and closing of the stop valve 1.

[0016] Preferably, a coil is provided on the liquid outlet pipe, the coil is connected with the liquid outlet pipe, the coil is provided in the second sealed cavity, the coil is connected with the transfer tube, a solenoid valve is provided on the coil, and the solenoid valve extends out of the second sealed cavity.

[0017] By adopting the above technical solution, a coil is provided on the liquid outlet pipe, the coil is connected with the liquid outlet pipe, the coil is arranged in the second sealed cavity, the coil is connected with the transfer tube, an electromagnetic valve is provided on the coil, the electromagnetic valve extends out of the second sealed cavity, and by regulating the opening and closing of the electromagnetic valve, it is possible to regulate whether the liquid hydrogen is transmitted to the use end via the water bath vaporizer.

[0018] Preferably, the coil is provided with an extension tube 2, the extension tube 2 is connected with the coil, the extension tube 2 extends out of the second sealed cavity, the extension tube 2 is provided with a stop valve 2, and the stop valve 2 is located above the cover plate.

[0019] By adopting the above technical solution, an extension tube 2 is provided on the coil, the extension tube 2 is connected with the coil, the extension tube 2 extends out of the second sealing cavity, and a stop valve 2 is provided on the extension tube 2. The stop valve 2 is located above the cover plate. The solenoid valve may be damaged due to the influence of air pressure. If the solenoid valve is damaged, it can be opened and closed by the stop valve 2 to improve the overall safety.

[0020] Preferably, the coil is provided with annular tube fins.

[0021] By adopting the above technical solution, annular tube fins are provided on the coil to enhance the heat exchange efficiency of the coil in the second sealed cavity.

[0022] Preferably, a bottom plate is provided under the container body, a support plate is provided on the bottom plate, a support arc plate 1 is provided on the support plate, the container body is provided on the support arc plate 1, a support arc plate 2 is provided on the bottom plate, the support arc plate 2 is provided next to the support plate, and the water bath vaporizer is provided on the support arc plate 2.

[0023] By adopting the above technical solution, a bottom plate is arranged under the container body, a support plate is arranged on the bottom plate, a support arc plate 1 is arranged on the support plate, the container body is arranged on the support arc plate 1, a support arc plate 2 is arranged on the bottom plate, the support arc plate 2 is arranged next to the support plate, and the water bath vaporizer is arranged on the support arc plate 2, thereby improving the installation stability of the container body and the water bath vaporizer.

[0024] Preferably, a support seat is provided on the base plate, the water bath vaporizer is provided in the support seat, a support arc seat is provided on the support seat, the arc plate plate is provided on the support arc seat, an oblique support rod is provided on the support arc seat, the oblique support rod and the support arc seat are connected by screws, and the oblique support rod and the arc plate plate are connected by screws.

[0025] By adopting the above technical solution, a support seat is provided on the bottom plate, a water bath vaporizer is provided in the support seat, a support arc seat is provided on the support seat, an arc plate plate is provided on the support arc seat, an oblique support rod is provided on the support arc seat, the oblique support rod and the support arc seat are connected by screws, and the oblique support rod and the arc plate plate are connected by screws, thereby improving the stability of the overall installation of the box.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The box is arranged beside the container, the box is filled with nitrogen, the liquid outlet pipe is arranged inside the box, the liquid outlet pipe is connected to the container, the water bath vaporizer is arranged beside the box, the connecting pipe is connected to the water bath vaporizer, the liquid outlet pipe is connected to the connecting pipe, the hydrogen flows from the container to the use end via the liquid outlet pipe, the connecting pipe and the water bath vaporizer. When the cold liquid hydrogen flows through the box, it first fully conducts convection heat exchange with the nitrogen in the box, so that the medium temperature in the liquid outlet pipe is higher than the boiling point of liquid nitrogen, and the liquid hydrogen will not be empty after the liquid hydrogen leaves the box. The liquid hydrogen in the liquid outlet pipe is slowly exchanged with the air, which effectively avoids the phenomenon of direct liquefaction of air and improves the safety of storage and transportation of liquid hydrogen. 2. The first heat-conducting wave plate is arranged in the box body, the first heat-conducting wave plate is arranged below the liquid outlet pipe, the second heat-conducting wave plate is arranged in the box body, the second heat-conducting wave plate is arranged below the first heat-conducting wave plate, there is a gap between the side of the first heat-conducting wave plate away from the container body and the inner wall of the box body, there is a gap between the side of the second heat-conducting wave plate away from the container body and the inner wall of the box body, and the top and bottom surfaces of the first heat-conducting wave plate and the second heat-conducting wave plate are provided with guide grooves. Due to sufficient convection heat exchange, when the temperature of the nitrogen in the box is lower than the boiling point, the phase change liquefaction drips and It is laid flat on the upper plane of the heat-conducting wave plate 1. When the amount of liquefied liquid nitrogen is small, the cold energy directly exchanges heat with the room temperature outside the box along the heat-conducting wave plate 1; when the amount of liquefied liquid nitrogen is large, the accumulated liquid nitrogen finally flows to the bottom plane of the box along the guide grooves of the heat-conducting wave plate 1 and the heat-conducting wave plate 2, and performs secondary heat exchange with the air through the metal on the bottom plane and the side of the box. The liquid nitrogen in the box vaporizes and rises to wrap the liquid outlet pipe to exchange heat with the medium in the liquid outlet pipe again, so that the purpose of heat exchange without energy loss of the medium inside the liquid outlet pipe can be achieved; 3. A vacuum design is adopted in the first sealed cavity. A liquid adding pipe and a liquid inlet pipe are arranged in the first sealed cavity. The liquid adding pipe extends out of the first sealed cavity. The liquid adding pipe can be connected to an external liquid supply device. The liquid inlet pipe is connected to the liquid adding pipe. The liquid inlet pipe extends out of the first sealed cavity. The liquid inlet pipe is connected to the container body. The closed cavity where the liquid inlet pipe is located is designed to be a vacuum, which reduces the heat exchange opportunity during the liquid inlet process and ensures the cooling capacity of the liquid inlet medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a valve box structure for preventing liquid emptying in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the internal structure of the box in the embodiment of the present application.

[0029] Description of reference numerals: 1. Bottom plate; 11. Support plate; 12. Support arc plate 1; 13. Support arc plate 2; 14. Support seat; 15. Support arc seat; 16. Oblique support rod; 2. Container body; 3. Control mechanism; 31. Liquid outlet pipe; 32. Water bath vaporizer; 33. Connecting pipe; 34. Heat transfer wave plate 1; 35. Heat transfer wave plate 2; 36. Coil; 37. Solenoid valve; 38. Extension pipe 2; 39. Stop valve 2; 4. Box body; 41. Head; 42. Arc plate; 421. Transfer pipe; 43. Partition; 44. Cover plate; 45. Side plate; 5. First sealed cavity; 51. Extension pipe 1; 52. Stop valve 1; 6. Second sealed cavity; 7. Liquid adding pipe; 8. Liquid inlet pipe; 9. Annular tube fin. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The embodiment of the present application discloses a valve box structure for preventing liquid emptying. Figure 1 As shown, a valve box structure for preventing liquid emptying phenomenon includes a bottom plate 1, a container body 2 and a regulating mechanism 3. The bottom plate 1 is horizontally arranged, and the length direction of the bottom plate 1 is parallel to the ground. A support plate 11 is arranged on the top surface of the bottom plate 1, and the length direction of the support plate 11 is the same as the length direction of the bottom plate 1.

[0032] Reference Figure 1 and Figure 2 As shown, a supporting arc plate 12 is arranged on the top surface of the supporting plate 11, and there are two supporting arc plates 12. The container body 2 includes a container body and an outer container. The outer container is arranged on the supporting arc plate 1, and the length direction of the outer container is the same as the length direction of the supporting plate. The container body is arranged in the outer container, and the length direction of the container body is the same as the length direction of the outer container. The axial centerline direction of the container body coincides with the axial centerline direction of the outer container.

[0033] Reference Figure 1 and Figure 2 As shown, the regulating mechanism 3 includes a box body 4, a liquid outlet pipe 31, a water bath vaporizer 32, a connecting pipe 33, a heat conduction wave plate 1 34 and a heat conduction wave plate 2 35. A support arc plate 2 13 is arranged on the bottom plate 1. There are two support arc plates 2 13. The support arc plate 2 13 is arranged beside the support plate 11. The water bath vaporizer 32 is arranged on the support arc plate 2 13. The length direction of the water bath vaporizer 32 is parallel to the ground, and the length direction of the water bath vaporizer 32 is perpendicular to the length direction of the container body 2, so as to improve the stability of the installation of the container body 2 and the water bath vaporizer 32.

[0034] Reference Figure 1 and Figure 2 As shown, the box body 4 includes a head 41, an arc plate 42, a partition 43, a cover plate 44 and a side plate 45. The head 41 is arranged beside the container body 2, the arc plate 42 is arranged on the head 41, the partition 43 is arranged in the arc plate 42, the cover plate 44 is arranged on the partition 43, the side plate 45 is connected to the cover plate 44, the partition 43 is connected to the cover plate 44, the side plate 45 is arranged in the arc plate 42, the partition 43 is connected to the side plate 45, and the partition 43 divides the box body 4 into a first sealed cavity 5 and a second sealed cavity 6.

[0035] Reference Figure 1As shown, a support seat 14 is provided on the bottom plate 1, a water bath vaporizer 32 is provided in the support seat 14, a support arc seat 15 is provided on the support seat 14, an arc plate 42 is provided on the support arc seat 15, an oblique support rod 16 is provided on the support arc seat 15, there are two oblique support rods 16, the two oblique support rods 16 are symmetrical about the support arc seat 15, the oblique support rods 16 are connected to the support arc seat 15 by screws, and the oblique support rods 16 are connected to the arc plate 42 by screws, so as to improve the stability of the overall installation of the box body 4.

[0036] Reference Figure 1 and Figure 2 As shown, the second sealed cavity 6 is filled with nitrogen, the liquid outlet pipe 31 is arranged in the second sealed cavity 6, the liquid outlet pipe 31 passes through the outer container and is connected to the container body, the water bath vaporizer 32 is arranged beside the box body 4, the connecting pipe 33 is connected to the water bath vaporizer 32, the liquid outlet pipe 31 is communicated with the connecting pipe 33, and the hydrogen flows from the container body 2 to the use end via the liquid outlet pipe 31, the connecting pipe 33, and the water bath vaporizer 32. When the cold liquid hydrogen flows through the box body 4, it first fully performs convection heat exchange with the nitrogen in the box body 4, so that the medium temperature in the liquid outlet pipe 31 is higher than the boiling point of liquid nitrogen, and the liquid air phenomenon after the liquid hydrogen exits the box body 4 in the liquid outlet pipe 31 will not occur.

[0037] Reference Figure 1 and Figure 2 As shown, a through hole is opened on the top surface of the cover plate 44, and a transfer tube 421 is arranged on the cover plate 44, one end of the transfer tube 421 extends into the second sealed cavity 6, the transfer tube 421 is connected to the liquid outlet pipe 31, and the other end of the transfer tube 421 extends out of the second sealed cavity 6, and the transfer tube 421 is connected to the connecting pipe 33, thereby improving the sealing performance of the box body 4.

[0038] Reference Figure 2 As shown, the thermal wave plate 1 34 is arranged in the box body 4, the thermal wave plate 1 34 is arranged below the liquid outlet pipe 31, the thermal wave plate 2 35 is arranged in the box body 4, the thermal wave plate 2 35 is arranged below the thermal wave plate 1 34, there is a gap between the side of the thermal wave plate 1 34 away from the container body 2 and the inner wall of the box body 4, there is a gap between the side of the thermal wave plate 2 35 away from the container body 2 and the inner wall of the box body 4, and the top and bottom surfaces of the thermal wave plate 1 34 and the thermal wave plate 2 35 are provided with guide grooves.

[0039] Reference Figure 2 As shown, due to sufficient convection heat transfer, when the temperature of nitrogen in the box 4 is lower than the boiling point, the phase changes and liquefies and drips and spreads on the upper surface of the heat transfer wave plate 34. When the amount of liquefied liquid nitrogen is small, the cold energy is directly exchanged with the room temperature outside the box 4 along the heat transfer wave plate 34.

[0040] Reference Figure 2As shown, when the amount of liquefied liquid nitrogen is large, the accumulated liquid nitrogen eventually flows to the bottom plane of the box body 4 along the guide grooves of the heat conductive wave plate 1 34 and the heat conductive wave plate 2 35, and performs secondary heat exchange with the air through the metal on the bottom plane and the side of the box body 4. The liquid nitrogen in the box body 4 vaporizes and rises to wrap the liquid outlet pipe 31 to exchange heat with the medium in the liquid outlet pipe 31 again, so as to achieve the purpose of heat exchange without energy loss of the medium inside the liquid outlet pipe 31.

[0041] Reference Figure 2 As shown, a vacuum design is adopted in the first sealed cavity 5, and a liquid adding pipe 7 and a liquid inlet pipe 8 are arranged in the first sealed cavity 5. The liquid adding pipe 7 extends out of the first sealed cavity 5, and the liquid adding pipe 7 can be connected to an external liquid supply device. The liquid inlet pipe 8 is connected to the liquid adding pipe 7, and the liquid inlet pipe 8 extends out of the first sealed cavity 5. The liquid inlet pipe 8 passes through the outer container and is connected to the inner container. The closed cavity where the liquid inlet pipe 8 is located is designed to be a vacuum, which reduces the heat exchange opportunity during the liquid inlet process and ensures the cooling capacity of the liquid inlet medium.

[0042] Reference Figure 2 As shown, an extension tube 51 is provided in the first sealed cavity 5, the extension tube 51 is connected with the liquid inlet tube 8, the extension tube 51 is connected with the liquid adding tube 7, the extension tube 51 extends out of the cover plate 44, and a stop valve 52 is provided on the extension tube, and the stop valve 52 is located above the cover plate 44. By regulating the opening and closing of the stop valve 52, it is possible to control whether liquid hydrogen enters the container body 2 for temporary storage.

[0043] Reference Figure 2 As shown, a coil 36 is provided on the liquid outlet pipe 31, and the coil 36 is connected to the liquid outlet pipe 31. The coil 36 is arranged in the second sealed cavity 6, and the coil 36 is connected to the transfer tube 421. A solenoid valve 37 is provided on the coil 36, and the solenoid valve 37 extends out of the second sealed cavity 6. By regulating the opening and closing of the solenoid valve 37, it is possible to regulate whether the liquid hydrogen is transmitted to the use end via the water bath vaporizer 32.

[0044] Reference Figure 2 As shown, the coil 36 is provided with an extension tube 2 38, which is connected with the coil 36, and extends out of the second sealing cavity 6. The extension tube 2 38 is provided with a stop valve 2 39, and the stop valve 2 39 is located above the cover plate 44. The solenoid valve 37 may be damaged due to the air pressure. If the solenoid valve 37 is damaged, it can be opened and closed by the stop valve 2 39 to improve the overall safety.

[0045] Reference Figure 2 As shown, the coil 36 is provided with an annular tube fin 9 to enhance the heat exchange efficiency of the coil 36 in the second sealed cavity 6 .

[0046] The implementation principle of a valve box structure for preventing liquid emptying in the embodiment of the present application is as follows: The hydrogen flows from the inner container to the use end via the outer container, the liquid outlet pipe 31, the connecting pipe 33, and the water bath vaporizer 32. When the cold liquid hydrogen flows through the box body 4, it first fully performs convection heat exchange with the nitrogen in the box body 4, so that the medium temperature in the liquid outlet pipe 31 is higher than the boiling point of liquid nitrogen, and the liquid hydrogen in the liquid outlet pipe 31 will not be empty after it leaves the box body 4. The liquid hydrogen in the liquid outlet pipe 31 is slowly exchanged with the air, which effectively avoids the phenomenon of direct liquefaction of air and improves the safety of storage and transportation of liquid hydrogen.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A valve box structure for preventing liquid emptying, comprising a container body (2) for storing liquid hydrogen, characterized in that: A regulating mechanism (3) is arranged next to the container body (2), and the regulating mechanism (3) comprises a box body (4) arranged next to the container body (2), a liquid outlet pipe (31) connected to the container body (2), a water bath vaporizer (32) arranged next to the box body (4), and a connecting pipe (33) connected to the water bath vaporizer (32); the box body (4) is filled with nitrogen; the liquid outlet pipe (31) is arranged in the box body (4), and the liquid outlet pipe (31) is connected to the connecting pipe (33).

2. A valve box structure for preventing liquid emptying according to claim 1, characterized in that: The regulating mechanism (3) comprises a first heat conduction wave plate (34) arranged below the liquid outlet pipe (31) and a second heat conduction wave plate (35) arranged below the first heat conduction wave plate (34); the first heat conduction wave plate (34) is arranged in the box body (4); the second heat conduction wave plate (35) is arranged in the box body (4); there is a gap between the side of the first heat conduction wave plate (34) away from the container body (2) and the inner wall of the box body (4); there is a gap between the side of the second heat conduction wave plate (35) away from the container body (2) and the inner wall of the box body (4); and guide grooves are provided on the top surface and the bottom surface of the first heat conduction wave plate (34) and the second heat conduction wave plate (35).

3. A valve box structure for preventing liquid emptying according to claim 2, characterized in that: The box body (4) comprises a head (41) arranged beside the container body (2), an arc plate (42) arranged on the head (41), a partition (43) arranged in the arc plate (42), a cover plate (44) arranged on the partition (43), and a side plate (45) connected to the cover plate (44), wherein the partition (43) is connected to the cover plate (44), the side plate (45) is arranged in the arc plate (42), the partition (43) is connected to the side plate (45), and the partition (43) divides the box body (4) into a first sealed cavity (5) and a second sealed cavity (5). A sealed cavity (6), the liquid outlet pipe (31), the first heat conduction wave plate (34) and the second heat conduction plate (34) are arranged in the second sealed cavity (6), the second sealed cavity (6) is filled with nitrogen, a through hole is opened on the top surface of the cover plate (44), a transfer pipe (421) is arranged on the cover plate (44), one end of the transfer pipe (421) extends into the second sealed cavity (6), the transfer pipe (421) is connected to the liquid outlet pipe (31), the other end of the transfer pipe (421) extends out of the second sealed cavity (6), and the transfer pipe (421) is connected to the connecting pipe (33).

4. A valve box structure for preventing liquid emptying according to claim 3, characterized in that: The first sealed cavity (5) adopts a vacuum design. A liquid adding pipe (7) and a liquid inlet pipe (8) are arranged in the first sealed cavity (5). The liquid adding pipe (7) extends out of the first sealed cavity (5). The liquid adding pipe (7) can be connected to an external liquid supply device. The liquid inlet pipe (8) is connected to the liquid adding pipe (7). The liquid inlet pipe (8) extends out of the first sealed cavity (5). The liquid inlet pipe (8) is connected to the container body (2).

5. A valve box structure for preventing liquid emptying according to claim 4, characterized in that: An extension tube (51) is provided in the first sealed cavity (5), the extension tube (51) is connected to the liquid inlet tube (8), the extension tube (51) is connected to the liquid adding tube (7), the extension tube (51) extends out of the cover plate (44), a stop valve (52) is provided on the extension tube, and the stop valve (52) is located above the cover plate (44).

6. A valve box structure for preventing liquid emptying according to claim 3, characterized in that: The liquid outlet pipe (31) is provided with a coil (36), the coil (36) is connected to the liquid outlet pipe (31), the coil (36) is arranged in the second sealed cavity (6), the coil (36) is connected to the transfer pipe (421), the coil (36) is provided with a solenoid valve (37), and the solenoid valve (37) extends out of the second sealed cavity (6).

7. A valve box structure for preventing liquid emptying according to claim 6, characterized in that: The coil (36) is provided with a second extension pipe (38), the second extension pipe (38) is connected to the coil (36), the second extension pipe (38) extends out of the second sealed cavity (6), and the second extension pipe (38) is provided with a second stop valve (39), and the second stop valve (39) is located above the cover plate (44).

8. The valve box structure for preventing liquid emptying according to claim 6, characterized in that: The coil (36) is provided with an annular tube fin (9).

9. The valve box structure for preventing liquid emptying according to claim 3, characterized in that: A bottom plate (1) is arranged below the container body (2), a support plate (11) is arranged on the bottom plate (1), a support arc plate 1 (12) is arranged on the support plate (11), the container body (2) is arranged on the support arc plate 1 (12), a support arc plate 2 (13) is arranged on the bottom plate (1), the support arc plate 2 (13) is arranged next to the support plate (11), and the water bath vaporizer (32) is arranged on the support arc plate 2 (13).

10. A valve box structure for preventing liquid emptying according to claim 9, characterized in that: A support seat (14) is arranged on the bottom plate (1), the water bath vaporizer (32) is arranged in the support seat (14), a support arc seat (15) is arranged on the support seat (14), the arc plate (42) is arranged on the support arc seat (15), an oblique support rod (16) is arranged on the support arc seat (15), the oblique support rod (16) and the support arc seat (15) are connected by screws, and the oblique support rod (16) and the arc plate (42) are connected by screws.

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