Internal anti-shaking device based on liquid hydrogen tank box

Abstract

The invention discloses an internal anti-shaking device based on a liquid hydrogen tank box, relates to the technical field of liquid storage and transportation, and solves the problems that an existing anti-shaking device in the liquid hydrogen tank box is single in structure and poor in anti-shaking effect. The horizontal liquid hydrogen tank comprises a horizontal liquid hydrogen tank box, a plurality of baffles, a plurality of fixing pipes and a floating ball net, wherein the baffles and the floating ball net are arranged in the horizontal liquid hydrogen tank box; the upper end of the baffle is connected with the wall surface of the horizontal liquid hydrogen tank through a fixing pipe and is driven by a motor to rotate; the floating ball net is detachably arranged above the baffle, and the two ends of the floating ball net are connected with the two ends of the horizontal liquid hydrogen tank box respectively. By combining the detachable net-shaped floating balls and the rotatable anti-shaking baffles, shaking of liquid hydrogen can be remarkably reduced in different driving environments, shaking of liquid hydrogen in the tank in the liquid hydrogen transportation process is effectively reduced, potential safety hazards in the transportation process are reduced, and therefore the transportation safety and stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid storage and transportation, and in particular to an internal anti-sway device based on a liquid hydrogen tank box. Background Art

[0002] With the deepening development of my country's industrialization process, hydrogen energy has attracted much attention as a key solution to meet the complex challenges of energy transformation and achieve decarbonization in all walks of life. As a hub, the storage and transportation link is very critical to the development of the entire hydrogen energy industry chain. Liquid hydrogen tanks play an important role in the storage and transportation links due to their advantages such as flexible transportation and low transportation costs. However, during transportation, operations such as acceleration, turning, and braking will cause the cryogenic liquid in the tank to slosh violently, generating impact loads on the tank body. At present, the requirements for the setting of wave-breaking plates for liquid hydrogen tanks have not been clearly defined in typical mobile pressure vessel specifications and standards at home and abroad. Therefore, it is very important to conduct liquid sloshing response analysis of liquid hydrogen tanks and provide reasonable suggestions for the setting of wave-breaking plates.

[0003] Since 1960, the phenomenon of liquid sloshing in partially filled tanks has attracted widespread attention. Due to the potential risks that liquid sloshing may cause, researchers have been committed to developing devices and structural designs to suppress sloshing. Early research focused on the application of compartments or rigid walls. Studies have shown that compartments or rigid walls can effectively limit the sloshing of liquids, but these structures not only significantly increase the weight of the system, but also bring inconvenience to cleaning and maintenance.

[0004] In recent years, wave-breaking panels have been widely studied and applied as a more optimized structure. The effectiveness of wave-breaking panels in industrial fields such as spacecraft, ships, tank trucks and fixed storage tanks has been fully verified. Common types of wave-breaking panels include vertical wave-breaking panels, horizontal wave-breaking panels, curved wave-breaking panels and T-type wave-breaking panels. Although a large number of studies have demonstrated the effectiveness of wave-breaking panels in suppressing liquid sloshing, most of the studies were conducted under simple harmonic excitation conditions, which are more suitable for fields such as ships and vertical storage tanks, resulting in poor dynamic similarity between the results and the actual liquid sloshing in the tank of a tank truck.

[0005] Some researchers have conducted in-depth research on the effect of wave-breaking plates in tank trucks on suppressing liquid sloshing. For example, Kandasamy et al. analyzed tank trucks equipped with wave-breaking plates of different structures under mixed lateral and longitudinal acceleration conditions, and found that oblique wave-breaking plates can additionally suppress lateral sloshing compared with vertical wave-breaking plates. Zheng et al. studied three types of lateral wave-breaking plates through numerical simulation, and analyzed the influence of factors such as the installation angle, the size and position of the holes on the wave-breaking plates. Bautista et al. studied the effects of cross-shaped and X-shaped wave-breaking plates on parameters such as liquid velocity distribution, sloshing stabilization time, and turbulent kinetic energy in tank trucks. The results showed that X-shaped wave-breaking plates can make the liquid reach a stable state faster. Wang et al. compared the effects of combined wave-breaking plates and traditional wave-breaking plates on tank forces and moments, and found that combined wave-breaking plates can suppress both lateral and longitudinal liquid sloshing compared with traditional wave-breaking plates.

[0006] Although rigid wave-breaking plates perform well in suppressing liquid sloshing, they increase the total weight of the tank, thereby reducing transportation efficiency. Therefore, some researchers have proposed using lightweight materials, such as elastic plates, to replace rigid wave-breaking plates. Hwang et al. found through numerical simulation that elastic wave-breaking plates can achieve the same sloshing suppression effect as rigid wave-breaking plates. Zhang et al. also studied the liquid sloshing phenomenon in a tank with an elastic wave-breaking plate through numerical simulation. The results showed that the installation position and material parameters of the elastic wave-breaking plate are the key factors affecting its effect.

[0007] In addition, elastic membranes are also believed to have a suppressive effect on liquid sloshing. Chiba et al. studied the sloshing characteristics of spherical tanks with elastic membranes covering the free surface under vertical excitation and found that the elastic membranes significantly suppressed the nonlinear response components. Wang et al. conducted a series of experiments on scaled-down tanks with horizontally covered elastic membranes installed inside under longitudinal or transverse harmonic motion conditions. The results showed that the elastic membranes can not only reduce the pitch moment, but also increase the sloshing frequency to a higher value, thereby avoiding the resonance phenomenon in partially filled tanks.

[0008] Although there are a large number of literatures studying wave-breaking plates with different configurations, most of the studies only focus on a single type of wave-breaking plate, and few studies have explored the impact of installing both floating balls and rotatable wave-breaking plates in a tank on liquid sloshing.

[0009] In summary, we can see that the anti-sloshing device inside the tank has been established, but the solution of combining the floating ball and the wave-breaking plate for liquid hydrogen tank has not yet been seen. Therefore, the research in this direction not only has high research value, but also has important practical significance for improving the safety and reliability of liquid hydrogen tanks. Summary of the invention

[0010] In order to solve the above-mentioned problem that the existing anti-sloshing device in the liquid hydrogen tank has a single structure and poor anti-sloshing effect, the present invention proposes an internal anti-sloshing device based on the liquid hydrogen tank. The present invention combines a detachable mesh floating ball and a rotatable anti-sloshing baffle to significantly reduce the sloshing of liquid hydrogen in different driving environments, effectively reduce the sloshing of liquid hydrogen in the tank during the transportation of liquid hydrogen, reduce safety hazards during transportation, and thus improve the safety and stability of transportation.

[0011] The present invention proposes an internal anti-sway device based on a liquid hydrogen tank box, which specifically includes a horizontal liquid hydrogen tank box, a plurality of baffles, a plurality of fixed pipes and a float net, wherein the baffles and the float net are arranged inside the horizontal liquid hydrogen tank box; the upper end of the baffle is connected to the wall of the horizontal liquid hydrogen tank box through the fixed pipe; the float net is detachably arranged above the baffle, and the two ends of the float net are respectively connected to the two ends of the horizontal liquid hydrogen tank box.

[0012] Furthermore, the fixed pipe is rotatably connected to the wall of the horizontal liquid hydrogen tank box, and the fixed pipe is connected to an external motor, and the motor drives the baffle to rotate through the fixed pipe.

[0013] Furthermore, the baffle is arranged on the through hole.

[0014] Furthermore, the through hole and the horizontal liquid hydrogen tank are coaxial.

[0015] Furthermore, the buoy net includes a plurality of floating buoys and a plurality of connecting members, and the plurality of floating buoys are connected to each other through the connecting members.

[0016] Furthermore, the floating ball is divided into two parts, one part is made of polyethylene, and the other part uses synthetic resin as a matrix and is filled with hollow ceramic microspheres.

[0017] Furthermore, the two types of floating balls in the floating ball net are arranged alternately in a circle from the outside to the inside, and the outermost circle is the floating balls with synthetic resin as the matrix.

[0018] Furthermore, the filling volume of the hollow ceramic microspheres accounts for 60%.

[0019] Furthermore, the connecting member is an elastic member.

[0020] Furthermore, the connecting member is made of synthetic resin.

[0021] The beneficial effects of the internal anti-sloshing device based on the liquid hydrogen tank box described in the present invention are:

[0022] (1) The present invention discloses an internal anti-sloshing device based on a liquid hydrogen tank box. The mesh structure formed by the detachable mesh floating ball cuts the liquid surface area, reduces the total amount of liquid sloshing locally and reduces the span of the free liquid surface, thereby reducing the sloshing of the liquid in the tank. At the same time, the mesh structure formed by the detachable mesh floating ball replaces part of the baffle, reducing the mass of the tank body. The detachable design of the float net enables the float device to be replaced in time, ensuring that the device always maintains the best anti-sloshing effect. Compared with the elastic membrane for reducing sloshing in traditional storage and transportation, the mesh floating ball does not affect the recovery of liquid hydrogen evaporated gas, and the generated evaporated gas can be reused through the recovery pipeline.

[0023] (2) The internal anti-sway device based on the liquid hydrogen tank box described in the present invention divides the liquid volume by setting three fixed tubes and a drivable baffle to further reduce the sway of liquid hydrogen and the impact on the tank box; during the starting and braking process of the tank truck, the liquid hydrogen tank will sway violently under external excitation, and the baffle is driven by a motor to rotate, generating a torque opposite to the external torque, thereby offsetting part of the sway; compared with traditional wave-breaking plates, the drivable baffle controlled by a motor can be flexibly adjusted to cope with different driving environments, thereby minimizing the sway of liquid hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic diagram of the internal structure of an internal anti-sloshing device based on a liquid hydrogen tank box according to the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of a top view of an internal anti-sloshing device based on a liquid hydrogen tank box according to the present invention;

[0028] Figure 3 It is a schematic diagram of the overall structure of an internal anti-sloshing device based on a liquid hydrogen tank box according to the present invention;

[0029] Among them: 1-outer wall of horizontal liquid hydrogen tank box, 2-inner wall of horizontal liquid hydrogen tank box, 3-baffle, 4-fixed pipe, 5-floating ball, 6-connecting component. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Specific implementation method 1: See Figure 1-Figure 3 The present embodiment is described in detail. The internal anti-sway device based on the liquid hydrogen tank described in the present embodiment specifically includes a horizontal liquid hydrogen tank, a plurality of baffles 3, a plurality of fixed tubes 4 and a float net, wherein the baffles 3 and the float net are arranged inside the horizontal liquid hydrogen tank; the upper end of the baffle 3 is connected to the wall of the horizontal liquid hydrogen tank through the fixed tube 4, and the fixed tube 4 is 90° to the ground; the float net is detachably arranged above the baffle 3, and the baffles 3 and the fixed tubes 4 are arranged at equal intervals to limit the float net to prevent large-area deformation of the structure during swaying; the two ends of the float net are respectively connected to the two ends of the horizontal liquid hydrogen tank, and the long side of the float net is not connected to the horizontal liquid hydrogen tank.

[0035] The fixed tube 4 is rotatably connected to the wall of the horizontal liquid hydrogen tank, and the fixed tube 4 is connected to the motor arranged outside the outer wall 1 of the horizontal liquid hydrogen tank. The output end of the motor is connected to the fixed tube 4, and the baffle 3 is driven to rotate through the fixed tube 4. The baffle 3 uses the axis of the fixed tube 4 as the rotating axis and performs self-spinning motion through the motor control; the motor is controlled by the motor control switch. The overall shape of the baffle 3 is circular and the upper part is cut into a plane, which is connected to the fixed tube 4; a through hole is arranged on the baffle 3, and the through hole is circular and coaxial with the horizontal liquid hydrogen tank.

[0036] The floating ball net includes a plurality of floating balls 5 and a plurality of connecting members 6. The plurality of floating balls 5 are connected to each other through the connecting members 6. The floating balls 5 and the connecting members 6 are connected by threaded engagement, which is convenient for disassembly and replacement. The connecting members 6 are elastic members made of synthetic resins, such as melamine resin and phenolic resin. The elastic properties of such resins remain basically unchanged under freezing conditions and room temperature conditions, and can be used to relieve the impact force between the connecting structures.

[0037] The floating ball 5 is divided into two parts, one part is made of polyethylene, and the other part is made of synthetic resin as a matrix and filled with hollow ceramic microspheres. The filling volume of the hollow ceramic microspheres accounts for 60%. The floating ball 5 of synthetic resin provides structural buoyancy, and the floating ball 5 of polyethylene ensures the effective contact surface between the mesh structure and the liquid surface, so as to achieve the purpose of dividing the liquid surface area by the overall structure.

[0038] The two kinds of floating balls 5 in the floating ball net are arranged alternately from outside to inside in a circle, and the outermost circle is the floating balls 5 with a synthetic resin as a matrix, which is used to prevent the floating ball net from hard collision with the inner wall 2 of the horizontal liquid hydrogen tank during shaking.

[0039] The specific working principle of the internal anti-sloshing device based on the liquid hydrogen tank box described in the present invention is:

[0040] During the normal driving of the liquid hydrogen heavy truck, the float net and the baffle 3 work together to effectively reduce the shaking of the liquid hydrogen; during the turning process, the baffle 3 is mainly rotated by controlling the motor to generate a torque opposite to the steering, and with the assistance of the floating float 5, the shaking is further reduced; during the start-stop, acceleration and deceleration process, the baffle 3 is mainly used to reduce the shaking and impact force of the liquid hydrogen.

[0041] To summarize the above implementation cases, the internal anti-sloshing device based on the liquid hydrogen tank box described in the present invention cuts the surface area of ​​the liquid surface through the mesh structure formed by the detachable mesh floating buoy, reduces the total amount of liquid sloshing locally and reduces the span of the free liquid surface, thereby reducing the sloshing of the liquid in the liquid tank; at the same time, the mesh structure formed by the detachable mesh floating buoy replaces part of the baffle, reducing the mass of the tank body; the detachable design of the float net enables the float device to be replaced in time to ensure that the device always maintains the best anti-sloshing effect; compared with the elastic membrane that reduces sloshing in traditional storage and transportation, the mesh floating buoy does not affect the recovery of liquid hydrogen evaporated gas, and the generated evaporated gas can be reused through the recovery pipeline. The internal anti-sway device based on the liquid hydrogen tank box described in the present invention divides the liquid volume by arranging three fixed tubes 4 and a drivable baffle 3, thereby further reducing the sway of liquid hydrogen and the impact on the tank box; during the starting and braking process of the tank truck, the liquid hydrogen tank will sway violently under external excitation, and the baffle 3 is driven by a motor to rotate, generating a torque opposite to the external torque, thereby offsetting part of the sway; compared with traditional wave-breaking plates, the drivable baffle controlled by a motor can be flexibly adjusted when coping with different driving environments, thereby minimizing the sway of liquid hydrogen.

[0042] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal anti-sloshing device based on a liquid hydrogen tank, characterized in that: The invention comprises a horizontal liquid hydrogen tank box, a plurality of baffles (3), a plurality of fixed pipes (4) and a floating ball net, wherein the baffles (3) and the floating ball net are arranged inside the horizontal liquid hydrogen tank box; the upper end of the baffle (3) is connected to the wall surface of the horizontal liquid hydrogen tank box through the fixed pipe (4); the floating ball net is detachably arranged above the baffle (3), and the two ends of the floating ball net are respectively connected to the two ends of the horizontal liquid hydrogen tank box.

2. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 1 is characterized in that: The fixed pipe (4) is rotatably connected to the wall surface of the horizontal liquid hydrogen tank box, and the fixed pipe (4) is connected to an external motor, and the motor drives the baffle (3) to rotate through the fixed pipe (4).

3. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 1 is characterized in that: The baffle (3) is arranged on the through hole.

4. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 3 is characterized in that: The through hole is coaxial with the horizontal liquid hydrogen tank box.

5. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 1 is characterized in that: The floating ball net comprises a plurality of floating balls (5) and a plurality of connecting components (6), and the plurality of floating balls (5) are connected to each other via the connecting components (6).

6. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 5 is characterized in that: The floating ball (5) is divided into two parts, one part is made of polyethylene, and the other part uses synthetic resin as a matrix and is filled with hollow ceramic micro beads.

7. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 6 is characterized in that: The two types of floating balls (5) in the floating ball net are arranged alternately in a circle from the outside to the inside, and the outermost circle is the floating balls (5) with a synthetic resin as the base.

8. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 6 is characterized in that: The filling volume of the hollow ceramic microspheres accounts for 60%.

9. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 6 is characterized in that: The connecting component (6) is an elastic component.

10. The internal anti-sloshing device based on the liquid hydrogen tank according to claim 9 is characterized in that: The connecting component (6) is made of synthetic resin.

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