Discharging structure for liquid hydrogen combined storage tank

Abstract

The utility model discloses a discharging structure for a liquid hydrogen combined storage tank, and relates to the technical field of chemical engineering and new energy, the liquid hydrogen combined storage tank is a vertical storage tank and a double-layer hydrogen storage spherical tank arranged in the vertical storage tank, the top of the vertical storage tank is provided with a vertical storage tank top plate, and the discharging structure comprises a discharging pipe, an inner layer jacket and an outer layer jacket which are sequentially sleeved, expansion joints are arranged on the inner-layer jacket and the outer-layer jacket; the lower end of the discharge pipe extends to the inner bottom of the inner tank body through the discharge port, and the upper end of the discharge pipe extends to the outside of the top plate of the vertical storage tank; the inner-layer jacket is sleeved on the discharge pipe on the outer side of the outer tank body, the inner-layer jacket partially extends out of the top plate of the vertical storage tank, the bottom of the inner-layer jacket is hermetically connected to the outer wall of the outer tank body, and the top of the inner-layer jacket is hermetically connected to the outer wall of the discharge pipe. An inner-outer double-layer jacket structure is adopted, and the expansion joints are arranged on the inner jacket and the outer jacket respectively, so that overlarge temperature difference stress is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical and new energy technology field, more specifically to a kind of liquid hydrogen combined storage tank discharge structure technical field. BACKGROUND

[0002] Liquid hydrogen storage tank, for storing liquid hydrogen cryogenic container. Generally by inner bag, shell, adiabatic structure and connecting mechanical component, existing patent discloses the following technology:

[0003] CN109296932A, patent name is "a kind of liquid hydrogen storage tank" patent discloses the following contents: including inner tank, the outer wall of inner tank is equipped with composite material layer, the outer wall of composite material layer is equipped with adiabatic inner layer, the outer wall of adiabatic inner layer is equipped with adiabatic inner layer, the bottom of outer tank is fixedly connected with placing plate, the both sides of placing plate are fixedly connected with reinforcing rib, the both ends of the bottom of placing plate are fixedly connected with shock pad, placing plate is fixedly connected with base through shock pad. By setting reinforcing rib, shock pad, sleeve, damping spring, piston and piston rod, the advantages of strengthening fixation, shockproof and high safety are realized, reinforcing rib can strengthen the fixation of outer tank, shock pad is spring steel sheet, has good elasticity, and has buffering effect to vibration, and the setting of sleeve, damping spring, piston and piston rod provides the effect of double damping, greatly reduces vibration, avoids damage caused by vibration of the liquid hydrogen storage tank, and improves its safety.

[0004] To ensure the safety of discharging, the discharge port in the liquid hydrogen combined storage tank needs to pass through the outer layer of double-layer hydrogen storage spherical tank and the top plate of vertical storage tank simultaneously. While considering the mutual expansion, it should be beneficial to the filling of the spherical tank adiabatic material and cannot damage the vacuum state of the spherical tank. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of liquid hydrogen combined storage tank discharge structures to solve the above technical problems.

[0006] The utility model discloses a kind of liquid hydrogen combined storage tank discharge structures to solve the above technical problems.

[0007] The utility model provides a kind of liquid hydrogen combined storage tank discharge structure, liquid hydrogen combined storage tank includes vertical storage tank and double-layer hydrogen storage spherical tank being set in vertical storage tank interior, vertical storage tank top is provided with vertical storage tank top plate, discharge structure includes the discharge pipe, inner layer jacket and outer layer jacket that are successively set, inner layer jacket and outer layer jacket are all provided with expansion joint on it;

[0008] Inner tank body and outer tank body top are all provided with the discharge port allowing discharge pipe to pass, discharge pipe lower end extends to the inner bottom of inner tank body through discharge port, discharge pipe upper end extends to vertical storage tank top plate outside;

[0009] The inner layer jacket is sleeved on the discharge pipe outside the outer tank body, the inner layer jacket partially extends out of the top plate of the vertical storage tank, the bottom of the inner layer jacket is sealingly connected to the outer wall of the outer tank body, and the top of the inner layer jacket is sealingly connected to the outer wall of the discharge pipe.

[0010] In one embodiment, a gap exists between the bottom of the discharge pipe and the inner bottom of the inner tank body.

[0011] In one embodiment, a plurality of inclined support rods are circumferentially distributed on the bottom of the discharge pipe, the lowest position of each inclined support rod is lower than the lowest position of the discharge pipe, and the bottom of each inclined support rod is welded to the inner wall of the inner tank body.

[0012] In one embodiment, a heat preservation gap is arranged between the discharge pipe and the inner layer jacket, and the heat preservation gap is filled with outlet heat insulation material.

[0013] In one embodiment, the outlet heat insulation material is made of one or more of perlite, glass fiber, asbestos, rock wool, silicate, aerogel felt or vacuum panel.

[0014] In one embodiment, a sealing plate is arranged on the top of the inner layer jacket and sealingly welded to the outer wall of the discharge pipe, and the sealing plate is provided with a heat insulation material filling port in communication with the heat preservation gap.

[0015] In one embodiment, an inner layer jacket expansion joint is arranged on the top of the side wall of the inner layer jacket.

[0016] In one embodiment, an outer layer jacket is sleeved on the inner layer jacket outside the top plate of the vertical storage tank, the bottom of the outer layer jacket is welded to the top plate of the vertical storage tank, and the top of the outer layer jacket is welded to the side wall of the inner layer jacket below the inner layer jacket expansion joint through the sealing plate.

[0017] In one embodiment, an outer layer jacket expansion joint is arranged on the top of the side wall of the outer layer jacket.

[0018] A top plate hole is arranged on the top of the top plate of the vertical storage tank and sealingly welded to the outer wall of the inner layer jacket.

[0019] Specifically, the inner and outer double-layer jacket structure is adopted, the expansion joints are arranged on the inner and outer jackets respectively to avoid excessive temperature difference stress, and the heat insulation material filling port is arranged on the inner layer jacket to facilitate filling of the heat insulation material of the entire spherical tank.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model discloses a reasonable design, and the discharge port assembly adopts the inner and outer double -layered jacket structure, and sets up expansion joint on the inner and outer jacket respectively, avoids producing the excessive temperature difference stress. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained according to these drawings without creative labor.

[0023] Figure 1 It is the structural schematic diagram of the utility model;

[0024] Figure 2 It is Figure 1 Application scenario structural schematic diagram of

[0025] Drawing reference: 1 - inner tank body 2 - outer tank body, 3 - vertical storage tank top plate, 4 - discharge structure;

[0026] 4.1 - outer jacket, 4.2 - inner jacket, 4.3 - discharge pipe, 4.4 - heat insulation material filling port, 4.5 - inner jacket expansion joint, 4.6 - inner jacket expansion joint. DETAILED DESCRIPTION

[0027] In order to make the technical scheme, technical scheme and technical effect of the utility model clearer, the following will combine the drawings in the embodiments of the utility model, and the technical scheme in the embodiments of the utility model is clearly and completely described, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of the protection of the utility model.

[0029] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the embodiments of the utility model, it needs to be explained that the directions or position relations indicated by the terms "inner", "outer", "upper" and the like are based on the directions or position relations shown in the drawings, or are the directions or position relations commonly used when the utility model product is used, which are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as limiting the utility model.

[0031] Embodiment 1

[0032] As shown in Figures 1 to 2 , the embodiment provides a kind of liquid hydrogen combined storage tank discharge structure, liquid hydrogen combined storage tank includes vertical storage tank and the double-layer hydrogen storage spherical tank being set in vertical storage tank interior, vertical storage tank top is provided with vertical storage tank top plate 3, the discharge structure 4 includes discharge pipe 4.3, inner layer jacket 4.2 and outer layer jacket 4.1 that are successively sleeved, the inner layer jacket 4.2 and the outer layer jacket 4.1 are all provided with expansion joint on it;

[0033] Inner tank body and outer tank body top are all provided with the discharge port allowing discharge pipe 4.3 to pass, discharge pipe 4.3 lower end extends to the inner bottom of inner tank body through discharge port, discharge pipe 4.3 upper end extends to the outside of vertical storage tank top plate 3;

[0034] Inner layer jacket 4.2 is sleeved on the discharge pipe 4.3 outside outer tank body, inner layer jacket 4.2 partially extends out of vertical storage tank top plate 3, inner layer jacket 4.2 bottom sealing connection is connected on the outer wall of outer tank body, inner layer jacket 4.2 top sealing connection is connected on the outer wall of discharge pipe 4.3.

[0035] Embodiment 2

[0036] As shown in Figures 1 to 2 , the embodiment provides a kind of liquid hydrogen combined storage tank discharge structure, liquid hydrogen combined storage tank includes vertical storage tank and the double-layer hydrogen storage spherical tank being set in vertical storage tank interior, vertical storage tank top is provided with vertical storage tank top plate 3, discharge structure 4 includes discharge pipe 4.3, inner layer jacket 4.2 and outer layer jacket 4.1;

[0037] Inner tank body and outer tank body top are all provided with the discharge port allowing discharge pipe 4.3 to pass, discharge pipe 4.3 lower end extends to the inner bottom of inner tank body through discharge port, discharge pipe 4.3 upper end extends to the outside of vertical storage tank top plate 3;

[0038] The inner layer jacket 4.2 is sleeved on the discharge pipe 4.3 outside the outer tank body, the inner layer jacket 4.2 partially extends out of the vertical storage tank top plate 3, the bottom of the inner layer jacket 4.2 is sealingly connected to the outer wall of the outer tank body, the top of the inner layer jacket 4.2 is sealingly connected to the outer wall of the discharge pipe 4.3, and the inner layer jacket 4.2 is provided with an inner layer jacket expansion joint 4.6.

[0039] There is a gap between the bottom of the discharge pipe 4.3 and the inner bottom of the inner tank body.

[0040] Embodiment 3

[0041] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0042] The bottom of the discharge pipe 4.3 is circumferentially and uniformly provided with a plurality of inclined support rods, the lowest position of each inclined support rod is lower than the lowest position of the discharge pipe 4.3, and the bottom of each inclined support rod is welded to the inner wall of the inner tank body.

[0043] The discharge pipe 4.3 and the inner layer jacket 4.2 are provided with a heat preservation gap, and the heat preservation gap is filled with outlet heat insulation material.

[0044] The material of the outlet heat insulation material is one or more of perlite, glass fiber, asbestos, rock wool, silicate, aerogel felt or vacuum panel.

[0045] Embodiment 4

[0046] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0047] The top of the inner layer jacket 4.2 is provided with a sealing plate sealingly welded to the outer wall of the discharge pipe 4.3, and the sealing plate is provided with a heat insulation material filling port 4.4 in communication with the heat preservation gap.

[0048] The top of the side wall of the inner layer jacket 4.2 is provided with an inner layer jacket expansion joint 4.6.

[0049] The outer layer jacket 4.1 is sleeved on the inner layer jacket 4.2 outside the vertical storage tank top plate 3, the bottom of the outer layer jacket 4.1 is welded to the vertical storage tank top plate 3, and the top of the outer layer jacket 4.1 is welded to the side wall of the inner layer jacket 4.2 below the inner layer jacket expansion joint 4.6 through the sealing plate.

[0050] The top of the side wall of the outer layer jacket 4.1 is provided with an outer layer jacket 4.1 expansion joint.

[0051] The outer tank body is provided with an outer feed inlet with a diameter greater than the outer diameter of the discharge pipe 4.3, the inner tank body is provided with an inner feed inlet with a diameter matching the outer diameter of the discharge pipe 4.3, the bottom of the inner layer jacket 4.2 is sealingly welded at the outer feed inlet, and the outer wall of the discharge pipe 4.3 is sealingly welded on the inner feed inlet.

[0052] The top plate 3 of the vertical storage tank is provided with a top plate hole that is sealed to the outer wall of the inner jacket 4.2 by welding.

[0053] Specifically, a double-layer jacket structure is adopted, with expansion joints installed on both the inner and outer jackets to avoid excessive thermal stress. An insulation material filling port 4.4 is provided on the inner jacket 4.2 to facilitate the filling of the entire spherical tank with insulation material.

[0054] Example 5

[0055] like Figure 2 As shown, this embodiment provides a large liquid hydrogen combined storage tank with a low evaporation rate, including a vertical storage tank and a double-layer hydrogen storage spherical tank disposed inside the vertical storage tank. The double-layer hydrogen storage spherical tank includes a spherical tank insulation material filled in a vacuum cavity formed by the inner and outer tanks. There is a combined space gap between the outer wall of the double-layer hydrogen storage spherical tank and the inner wall of the vertical storage tank, and the combined space gap is filled with combined space insulation material.

[0056] The vertical storage tank is provided with a tank base at the bottom; the vertical storage tank includes a vertical storage tank bottom plate fixed on the tank base, a vertical storage tank body set on the vertical storage tank bottom plate, and a vertical storage tank top plate 3 set on the top of the vertical storage tank body; the inner wall and inner bottom of the vertical storage tank body are provided with a heat insulation protection layer, and a leakage protection layer that contacts the heat insulation material of the combined space is attached to the inner side of the heat insulation protection layer.

[0057] Specifically, when a leakage protection layer is installed between the outer tank of the double-walled hydrogen storage spherical tank and the vertical storage tank, even if the outer tank of the spherical tank leaks after the inner tank of the double-walled hydrogen storage spherical tank leaks, the liquid hydrogen can still be isolated by the leakage protection layer, ensuring that the vertical storage tank and the entire tank base are not damaged.

[0058] The insulation materials for the spherical tank and the combined space insulation materials are made of one or more of the following: perlite, glass fiber, asbestos, rock wool, silicate, aerogel felt, or vacuum board.

[0059] Specifically, the space between the inner and outer tanks is filled with perlite or other insulation material, and a vacuum is applied. The combined space between the double-walled spherical hydrogen storage tank and the vertical storage tank is filled with perlite or other insulation material.

[0060] The material of the leakage protection layer is one of the following: low-temperature metal material, low-temperature resistant insulating material, or high-density polyethylene sheet.

[0061] Specifically, low-temperature metal materials include austenitic stainless steel, nickel steel, low-alloy ferritic steel, aluminum alloy, copper and copper alloy, titanium and titanium alloy, iron-based superalloy, dual-phase steel, etc. Low-temperature resistant insulation materials include liquid nitrogen, liquid helium, polyethylene, polytetrafluoroethylene, polytrifluorochloroethylene, poly-p-xylylene, and glass fiber tape bonded with epoxy, etc. High-density polyethylene plate: This material performs well in extremely low-temperature environments, with a minimum use temperature of -70°C, and in some cases can withstand harsh conditions as low as -100°C. It has good mechanical strength and chemical stability, and is widely used in cold chain logistics, low-temperature storage and pharmaceutical fields.

Claims

1. A discharge structure for a liquid hydrogen combined storage tank, the liquid hydrogen combined storage tank comprising a vertical storage tank and a double-layered hydrogen storage spherical tank disposed inside the vertical storage tank, the top of the vertical storage tank being provided with a vertical storage tank top plate (3), characterized in that, The discharge structure (4) includes a discharge pipe (4.3), an inner jacket (4.2) and an outer jacket (4.1) arranged in sequence, and expansion joints are provided on both the inner jacket (4.2) and the outer jacket (4.1); Both the inner tank and the outer tank are provided with discharge ports at the top, allowing the discharge pipe (4.3) to pass through. The lower end of the discharge pipe (4.3) extends through the discharge port to the inner bottom of the inner tank, and the upper end of the discharge pipe (4.3) extends to the outside of the top plate (3) of the vertical storage tank. The inner jacket (4.2) is fitted on the discharge pipe (4.3) on the outside of the outer tank. The inner jacket (4.2) extends out of the top plate (3) of the vertical storage tank. The bottom of the inner jacket (4.2) is sealed to the outer tank, and the top of the inner jacket (4.2) is sealed to the outer wall of the discharge pipe (4.3).

2. The discharge structure for a liquid hydrogen combined storage tank according to claim 1, characterized in that, There is a gap between the bottom of the discharge pipe (4.3) and the bottom of the inner tank.

3. The discharge structure for a liquid hydrogen combined storage tank according to claim 1, characterized in that, The bottom of the discharge pipe (4.3) is evenly distributed with multiple inclined support rods around the circumference. The lowest position of each inclined support rod is lower than the lowest position of the discharge pipe (4.3). The bottom of each inclined support rod is welded to the inner wall of the inner tank.

4. The discharge structure for a liquid hydrogen combined storage tank according to claim 3, characterized in that, A heat insulation gap is provided between the discharge pipe (4.3) and the inner jacket (4.2), and the heat insulation gap is filled with outlet heat insulation material.

5. The discharge structure for a liquid hydrogen combined storage tank according to claim 4, characterized in that, The outlet insulation material is made of one or more of the following: perlite, glass fiber, asbestos, rock wool, silicate, aerogel felt, or vacuum board.

6. The discharge structure for a liquid hydrogen combined storage tank according to claim 1, characterized in that, The top of the inner jacket (4.2) is provided with a sealing plate that is welded to the outer wall of the discharge pipe (4.3), and the sealing plate is provided with a heat insulation material filling port (4.4) that communicates with the heat insulation gap.

7. The discharge structure for a liquid hydrogen combined storage tank according to claim 6, characterized in that, The inner jacket (4.2) is provided with an inner jacket expansion joint (4.5) on the top of its side wall.

8. The discharge structure for a liquid hydrogen combined storage tank according to claim 7, characterized in that, The outer jacket (4.1) is fitted onto the inner jacket (4.2) located outside the top plate (3) of the vertical storage tank. The bottom of the outer jacket (4.1) is welded to the top plate (3) of the vertical storage tank, and the top of the outer jacket (4.1) is welded to the side wall of the inner jacket (4.2) below the inner jacket expansion joint (4.5) by a sealing plate.

9. The discharge structure for a liquid hydrogen combined storage tank according to claim 8, characterized in that, An expansion joint for the outer jacket (4.1) is provided at the top of the side wall of the outer jacket (4.1); The top plate (3) of the vertical storage tank is provided with a top plate hole that is sealed to the outer wall of the inner jacket (4.2) by welding.

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