Shock absorption storage tank under earthquake action and LNG storage tank

Abstract

The invention discloses a shock absorption storage tank under the earthquake action and an LNG storage tank, the shock absorption storage tank under the earthquake action comprises a storage tank body and a shock absorption device arranged in the storage tank body, the shock absorption device comprises a plurality of shock absorption assemblies, and the multiple shock absorption assemblies are arranged in the depth direction of the storage tank body at intervals; and the storage tank body is divided into a plurality of parts. According to the damping storage tank under the earthquake action, a traditional liquid storage tank system is changed into a liquid storage tank system additionally provided with the damping assembly, the control effect on shaking of the liquid storage tank under the earthquake action is achieved, the solid-liquid coupling effect on the inner wall of the storage tank is reduced, and the stabilizing and supporting effects are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of LNG storage tanks, and particularly relates to a shock-absorbing storage tank under seismic action and an LNG storage tank. Background Art

[0002] Although large LNG storage tanks are only unit equipment in LNG receiving terminals, the investment proportion they account for is very high, and the damage to large LNG storage tanks under seismic action is very serious. It is necessary to ensure the safety of LNG storage tanks. Therefore, it is crucial to design a good seismic resistance and support system for LNG storage tanks.

[0003] During an earthquake, inertial forces cause the tank body structure to generate vibration responses, and the vibration of the tank body will cause the vibration of the LNG liquid inside the storage tank; the inertial force caused by the vibration of the LNG liquid will act on the tank body structure in the opposite direction, further affecting the vibration of the tank body. Therefore, when analyzing the response of the LNG storage tank - support system under seismic action, it is necessary to fully consider the coupling effect between the tank body and the LNG liquid. In addition, the LNG liquid is directly stored in the tank body. When the liquid vibrates, the contact surface between the LNG liquid and the tank body will change, and there is a relative displacement at the interface between the two substances. It is also necessary to consider the contact coupling relationship between the liquid and the tank body.

[0004] Therefore, there is an urgent need to design a shock-absorbing storage tank under seismic action to solve the above-mentioned problem of contact coupling between the liquid and the tank body. Summary of the Invention

[0005] To solve the technical problem of contact coupling between the liquid and the tank body mentioned in the background art, a shock-absorbing storage tank under seismic action and an LNG storage tank are provided.

[0006] To achieve the above object, the specific technical solutions of a shock-absorbing storage tank under seismic action and an LNG storage tank of the present invention are as follows: A shock-absorbing storage tank under seismic action includes a storage tank body and a shock-absorbing device arranged inside the storage tank body. The shock-absorbing device includes a plurality of shock-absorbing components, and the plurality of shock-absorbing components are arranged at intervals along the depth direction of the storage tank body to divide the storage tank body into a plurality of parts.

[0007] Further, the shock-absorbing component includes a support, the support is embedded inside the storage tank body, and a baffle is arranged at one end of the support away from the storage tank body, and the baffle can slide relative to the support.

[0008] Further, both the support and the baffle are annular. The inner ring of the annular support is sleeved on the outer wall of the annular baffle, and the outer ring is embedded inside the storage tank body.

[0009] Further, the support is set as a flexible member, the specification of the support is larger than the opening specification of the storage tank, and the specification of the baffle is smaller than the opening specification of the storage tank.

[0010] Furthermore, the thickness of the annular baffle is less than that of the annular sliding support.

[0011] Furthermore, an annular sliding groove is formed in the inner wall of the annular sliding support, and the annular baffle is slidably arranged in the annular sliding groove.

[0012] Furthermore, through holes are formed in the annular baffle, each through hole is arranged at the middle position of the annular baffle, and is coaxially arranged along the depth direction of the storage tank body.

[0013] Furthermore, through holes are formed in the annular baffle, and each through hole is arranged in a staggered manner along the depth direction of the storage tank body.

[0014] Furthermore, three damping components are provided, and the three damping components can divide the storage tank body into four parts.

[0015] An LNG storage tank uses the above-mentioned shock-absorbing storage tank under seismic action.

[0016] The shock-absorbing storage tank under seismic action of the present invention has the following advantages: the shock-absorbing storage tank under seismic action changes the traditional liquid storage tank system into a liquid storage tank system with added damping components, realizes the control effect on the sloshing of the liquid storage tank under seismic action, reduces the solid-liquid coupling effect on the inner wall of the storage tank, and plays a stabilizing and supporting role.

[0017] The LNG storage tank of the present invention has the following advantages: the LNG storage tank buffers the vibration generated by the inertial action of the tank body by setting the annular support as a flexible material, thereby reducing the vibration effect of the liquid arranged inside the tank body. That is to say, the setting of the flexible support can reduce the vibration effect under seismic conditions from the source, and avoid the strengthening of vibration caused by the coupling effect of the tank body and the liquid. In addition, the LNG storage tank of the present invention changes the prior art of welding a large number of baffles in the circumferential and vertical directions of the wall of a large LNG storage tank. Therefore, this solution greatly reduces the construction difficulty and construction cost, and will not cause large residual stress on the wall of the LNG storage tank due to a large number of welds, resulting in the deformation of the LNG storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the shock-absorbing storage tank of the present invention; Figure 2 is a schematic structural diagram of the damping component of the present invention; Figure 3 is a schematic structural diagram of the support of the present invention; Figure 4 is a schematic structural diagram of the baffle of the present invention.

[0019] Explanation of the marks in the figure: 1. Damping component; 2. Storage tank body; 3. Baffle; 4. Support; 5. Sliding groove. DETAILED DESCRIPTION OF THE INVENTION

[0020] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0022] The following refers to the attached Figure 1 to the attached Figure 4 Describe a shock-absorbing storage tank and an LNG storage tank under earthquake action of the present invention.

[0023] This embodiment provides a shock-absorbing storage tank under earthquake action. Figure 1 is a schematic structural diagram of the shock-absorbing storage tank of this embodiment, as Figure 1 shown, the shock-absorbing storage tank includes a storage tank body 2 and a shock-absorbing device arranged inside the storage tank body 2. The shock-absorbing device includes a plurality of shock-absorbing components 1, and the plurality of shock-absorbing components 1 are arranged at intervals along the depth direction of the storage tank body 2 to divide the storage tank body 2 into a plurality of parts. This shock-absorbing storage tank under earthquake action changes the traditional liquid storage tank system into a liquid storage tank system with additional shock-absorbing components, realizes the control of the sloshing of the liquid storage tank under earthquake action, reduces the solid-liquid coupling effect on the inner wall of the storage tank, and plays a role in stabilizing and supporting.

[0024] Figure 2 is a schematic structural diagram of the shock-absorbing component 1 of this embodiment; Figure 3 is a schematic structural diagram of the support 4 of this embodiment; Furthermore, as Figure 2 and Figure 3 shown, the shock-absorbing component 1 includes a support 4, the support 4 is embedded inside the storage tank body 2, a baffle 3 is arranged at one end of the support 4 away from the storage tank body 2, and the baffle 3 can slide relative to the support 4; both the support 4 and the baffle 3 are annular, the inner ring of the annular support 4 is sleeved on the outer wall of the annular baffle 3, and the outer ring is embedded inside the storage tank body 2. The function of the annular baffle 3 is to reduce liquid sloshing and reduce the solid-liquid coupling effect.

[0025] Furthermore, the support 4 is set as a flexible member. The specification of the support 4 is larger than the opening specification of the storage tank, and the specification of the baffle 3 is smaller than the opening specification of the storage tank. Setting the support 4 as a flexible member, when installation is required, the flexible support 4 will contract towards the central position to adapt to the opening of the storage tank. At this time, the specification of the support 4 is the same as that of the storage tank, and the support 4 can be fitted on the inner wall of the storage tank body 2. The staff can continue to adjust the support 4 until it is adjusted to the ideal position. After that, the staff can continue to install other supports 4 until all other supports 4 are installed inside the storage tank body 2.

[0026] Figure 4 It is a schematic structural view of the baffle 3 of this embodiment.

[0027] Furthermore, as Figures 2 - 4 shown, the thickness of the annular baffle 3 is smaller than the thickness of the annular sliding support 4. Setting the thickness of the annular baffle 3 as small as possible is convenient for reducing the sloshing of the liquid, so as to achieve the purpose of shock absorption.

[0028] Furthermore, as Figure 3 shown, an annular sliding groove 5 is formed on the inner wall of the annular sliding support 4, and the annular baffle 3 is slidably arranged in the annular sliding groove 5.

[0029] In this embodiment, there are through holes on the annular baffle 3. Each through hole is arranged in the middle position of the annular baffle 3 and is coaxially arranged along the depth direction of the storage tank body 2. Coaxial arrangement can ensure that the baffle 3 is evenly distributed, dividing the liquid area, making the movement of each layer of liquid relatively independent and reducing the overall sloshing energy.

[0030] Furthermore, in order to cope with specific asymmetric seismic waves (such as shear waves with obvious directionality), in some embodiments, there are through holes on the annular baffle 3. Each through hole is arranged in a staggered manner along the depth direction of the storage tank body 2. The purpose is that the non-coaxial baffle 3 may disrupt the resonance frequency of the liquid through staggering perturbation, playing a certain energy dissipation role. However, it should be noted that this effect still has a certain degree of uncertainty. That is to say, the non-coaxial setting method may be able to disperse energy in some cases, but it is necessary to specifically analyze whether it will produce favorable interference or unfavorable resonance.

[0031] In addition, if the annular baffle 3 is arranged in a non-coaxial manner, such as staggered or eccentric arrangement, the following effects may occur: 1. Asymmetric liquid division: resulting in differences in the sloshing modes of each liquid layer, which may cause local eddies or impacts, and instead exacerbate the stress on the tank wall; 2. Decreased sliding coordination: The misalignment of the baffle 3 and the sliding groove 5 of the support 4 may hinder sliding, increase the risk of jamming, and weaken the shock absorption effect; 3. Stress concentration risk: During an earthquake, the force directions of different coaxial retaining plates 3 are inconsistent, which may cause local structural fatigue or deformation, resulting in uneven long-term stress on the retaining plates 3, accelerating wear or failure, and further reducing the connection reliability between the support 4 and the tank body.

[0032] Therefore, those skilled in the art can understand that in the actual application process, an appropriate setting method can be selected according to the actual situation or the stress situation of the retaining plate 3, and no specific limitation is made here.

[0033] As a preferred embodiment, three damping components are provided, and the three damping components 1 can divide the storage tank body 2 into four parts. In other embodiments, the number of damping components 1 can also be set to four, five, etc., and no specific limitation is made here.

[0034] This embodiment also provides an LNG storage tank that uses the above-described damping storage tank under earthquake action. The LNG storage tank buffers the vibration generated by the inertial action of the tank body by setting the annular support 4 as a flexible material, thereby reducing the vibration effect of the liquid arranged inside the tank body. That is to say, the setting of the flexible support 4 can reduce the vibration effect in the earthquake state from the source and avoid the strengthening of vibration caused by the coupling effect of the tank body and the liquid. In addition, this LNG storage tank changes the prior art of welding a large number of retaining plates 3 circumferentially and vertically on the tank wall of a large LNG storage tank. Therefore, this solution greatly reduces the construction difficulty and construction cost, and will not cause large residual stress on the tank wall of the LNG storage tank due to a large amount of welding, resulting in deformation of the LNG storage tank.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A shock-absorbing storage tank under earthquake action, characterized in that: The utility model comprises a storage tank body and a shock absorbing device arranged inside the storage tank body. The shock absorbing device comprises a plurality of shock absorbing components. The plurality of shock absorbing components are arranged at intervals along the depth direction of the storage tank body to separate the storage tank body into a plurality of parts.

2. The shock-absorbing storage tank under earthquake action according to claim 1 is characterized in that: The shock absorbing assembly comprises a support, which is embedded in the interior of the storage tank body. A blocking piece is arranged at one end of the support away from the storage tank body, and the blocking piece can slide relative to the support.

3. The shock-absorbing storage tank under earthquake action according to claim 2 is characterized in that: The support and the baffle are both annular, the inner ring of the annular support is sleeved on the outer wall of the annular baffle, and the outer ring is embedded in the interior of the storage tank body.

4. The shock-absorbing storage tank under earthquake action according to claim 2 is characterized in that: The support is configured as a flexible member, the specification of the support is larger than the opening specification of the storage tank, and the specification of the baffle is smaller than the opening specification of the storage tank.

5. The shock-absorbing storage tank under earthquake action according to claim 3 is characterized in that: The thickness of the annular baffle is smaller than the thickness of the annular sliding support.

6. The shock-absorbing storage tank under earthquake action according to claim 3 is characterized in that: An annular sliding groove is provided on the inner wall of the annular sliding support, and the annular blocking piece is slidably arranged in the annular sliding groove.

7. The shock-absorbing storage tank under earthquake action according to claim 3 is characterized in that: The annular baffle is provided with through holes, each of which is arranged at the middle position of the annular baffle and is coaxially arranged along the depth direction of the storage tank body.

8. The shock-absorbing storage tank under earthquake action according to claim 3 is characterized in that: The annular baffle is provided with through holes, and each through hole is staggeredly arranged along the depth direction of the storage tank body.

9. The shock-absorbing storage tank under earthquake action according to any one of claims 1 to 8, characterized in that: Three shock absorbing assemblies are provided, and the three shock absorbing assemblies can divide the storage tank body into four parts.

10. An LNG storage tank, characterized in that: A shock-absorbing storage tank under earthquake action as described in any one of claims 1 to 9 is used.

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