Liquid tank multidirectional enclosure damping system for LNG (Liquefied Natural Gas) ship

Abstract

The utility model discloses a liquid tank multidirectional enclosure damping system for an LNG (liquefied natural gas) ship, which belongs to the technical field of enclosure damping systems for LNG ships and comprises mounting racks, an inner tank and baffles which are distributed front and back, the baffles are detachably connected to two ends of the mounting racks, mounting plates are symmetrically mounted between the mounting racks, lifting plates are symmetrically mounted on the inner sides of two ends of the mounting racks, and the lifting plates are detachably connected with the inner tank. Shock absorbers are fixedly installed on the two sides of one end of each lifting plate, one ends of the shock absorbers are fixedly connected with the installation frame, the inner tank is installed between the lifting plates, and shock absorption and buffering assemblies are installed at the inner ends of the installation plates. The first buffer springs and the second buffer springs conduct transverse damping, the situation that impact force generated by shaking causes certain damage to the enclosure system and further shaking of liquid goods in the inner cabin tank is avoided, and when the impact force is large, the inflatable air bag can prevent the inner cabin tank from further moving.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of LNG ship's protection shock absorbing system, concretely is a kind of LNG ship's liquid tank multidirectional protection shock absorbing system. BACKGROUND

[0002] When natural gas is shipped by sea, natural gas is generally liquefied, then packaged using a tank structure, and transported using an LNG ship. The storage tanks on conventional LNG ships are generally self-supporting tanks. The self-supporting tanks use an independent packaging structure, leaving a gap between the storage tank and the ship body. Each storage tank is individually arranged on a base. However, this approach does not take into account the special environment of the LNG ship during sea transport. When the LNG ship sails on the sea, it will be impacted by waves, causing the ship body to roll or pitch. Although the storage tank is fixedly installed on the base, the storage tank has a large weight. Once the ship is impacted by a large wave or during a long period of shaking, the storage tank and the base will become loose. At this time, the storage tank has no additional protective equipment, which will cause the liquefied natural gas inside the storage tank to shake. At this time, the base alone cannot maintain the stability of the storage tank. In addition, long-term and violent shaking will also increase the evaporation of liquefied natural gas.

[0003] For example, the patent with the publication number CN207389469U and the patent name "flat plate half-membrane prismatic LNG protection system" sets a plurality of general supports on the outside of the inner tank. The general supports can rotate in three degrees of freedom, i.e., longitudinally, transversely and around their own axes. This structure can alleviate the impact of rolling on the inner tank and avoid large shaking of the inner tank. However, the structure has poor shock absorption capacity. It needs to be repeatedly shaken to slowly reduce the shaking of the inner tank. In addition, the single structure has poor impact resistance. When the structure is damaged, the liquefied natural gas in the inner tank will further shake. In addition, the structure needs to be arranged at multiple positions on the inner tank and the ship body. When the tank is installed or removed, it is relatively complex. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a LNG ship's liquid tank multidirectional protection shock absorbing system to solve the above problems. The system can buffer the impact force received by the tank, maintain the stability of the tank, and avoid increasing the evaporation rate due to large-scale shaking of LNG.

[0005] The utility model discloses a LNG ship liquid tank multi -directional enclosure damping system through the following technical scheme to realize above -mentioned purpose, a kind of LNG ship liquid tank multi -directional enclosure damping system, including the mounting bracket of front and back distribution, inner tank and baffle, the baffle detachably connected in the both ends of the mounting bracket, the mounting plate is symmetrically installed between the mounting bracket, the lifting plate is symmetrically installed in the both ends of the mounting bracket inner side, the shock absorber is fixedly connected in the both ends of the mounting bracket one end with the mounting bracket, the inner tank is installed between the lifting plate, the shock absorbing buffer assembly is installed in the inner end of the mounting plate, when using, the shock absorbing buffer assembly is used to the shock absorbing protection of the inner tank, the shock absorber is existing equipment, play certain damping effect, the lifting plate is slidably installed in the both ends of the mounting bracket inner side, the baffle is connected with the mounting bracket by bolt, the inner tank is existing mechanism, for storing liquefied natural gas, and its outer side is provided with enclosure system.

[0006] Further, in order to make the buffer plate move smoothly, the shock absorbing buffer assembly includes a first buffer spring and a damping telescopic rod, the mounting plate is provided with a circular groove on both sides of one end, the damping telescopic rod is fixedly installed in the circular groove, the damping telescopic rod is fixedly installed with a buffer plate at the free end, one end of the buffer plate is in contact with the inner tank, and the damping telescopic rod is existing equipment.

[0007] Further, in order to shock absorbing and buffering for the inner tank, the first buffer spring is sleeved on the outer side of the damping telescopic rod, one end of the first buffer spring is fixedly installed in the circular groove, the other end of the first buffer spring is fixedly connected with the buffer plate, and the deformation force generated by the first buffer spring is used for damping.

[0008] Further, in order to improve the service life of the buffer plate, a buffer pad is fixedly installed at one end of the buffer plate, and the buffer pad is made of rubber material.

[0009] Further, in order to make the sliding block move smoothly, a square groove is formed on both sides of one end of the mounting plate, a guide rod is fixedly installed in the square groove, a sliding block is sleeved on the outer side of the guide rod, one end of the sliding block is hingedly connected with a square plate, one end of the square plate is hingedly connected with the buffer plate, and the sliding block can slide in the square groove.

[0010] Further, in order to further shock absorbing and buffering for the inner tank, a second buffer spring is sleeved on the outer side of the guide rod, one end of the second buffer spring is fixedly installed in the square groove, and the other end of the second buffer spring is fixedly connected with the sliding block.

[0011] Further, in order to make the push rod automatically move, the middle position inside one end of the mounting plate is fixedly provided with a circular tube, a piston with one end provided with a push rod is slidably arranged in the circular tube, and the push rod is fixedly connected with the buffer plate.

[0012] Further, in order to make the push rod automatically move, the middle position inside one end of the mounting plate is fixedly provided with a circular tube, a piston with one end provided with a push rod is slidably arranged in the circular tube, and the push rod is fixedly connected with the buffer plate.

[0013] The utility model discloses the beneficial effect that:

[0014] When the ship body produces the rolling or the longitudinal motion, the utility model discloses when using, the longitudinal shock absorption is carried out to the inner cabin jar through the shock absorber and the lifting plate, and the transverse shock absorption is carried out through the first buffer spring and the second buffer spring, prevent the impact force of the shaking from causing certain damage to the enclosure system, cause the liquid goods in the further sloshing of the inner cabin jar, and the damping effect is good, when the impact force is bigger, the inflatable air bag can further buffer the impact force, and the further movement of the inner cabin jar is blocked. DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the shock absorption buffer subassembly structure schematic diagram of the utility model;

[0017] Figure 3 It is the mounting plate connecting structure schematic diagram of the utility model;

[0018] Figure 4 It is the sliding block connecting structure schematic diagram of the utility model;

[0019] Figure 5 It is the circular tube and inflatable air bag connecting structure schematic diagram of the utility model;

[0020] Figure 6 It is the circular tube cross section structure schematic diagram of the utility model.

[0021] Drawing reference: 1, mounting frame; 2, inner cabin jar; 3, baffle; 4, mounting plate; 5, lifting plate; 6, shock absorber; 7, shock absorption buffer subassembly; 701, first buffer spring; 702, damping telescopic rod; 703, buffer plate; 704, buffer pad; 705, square groove; 706, guide rod; 707, sliding block; 708, square plate; 709, second buffer spring; 710, circular tube; 711, push rod; 712, piston; 713, inflatable air bag; 714, gas pipe. Specific implementation

[0022] For the convenience of understanding of those skilled in the art, the utility model will be further explained in combination with the embodiments below, and the content mentioned in the embodiments is not a limitation of the utility model.

[0023] Please refer to Figures 1-6 As shown in the figure, a LNG ship liquid tank multi-directional containment damping system, including installation frame 1, inner tank 2 and baffle 3 of front and rear distribution, baffle 3 can be detachably connected at the both ends of installation frame 1, two installation frames 1 are symmetrically installed with mounting plate 4 between them, the inner side of the both ends of installation frame 1 is symmetrically installed with lifting plate 5, the both sides of one end of lifting plate 5 are fixedly installed with shock absorber 6, one end of shock absorber 6 is fixedly connected with installation frame 1, inner tank 2 is installed between lifting plate 5, shock-absorbing buffer assembly 7 is installed in the inner end of mounting plate 4, when using, first manually separate one end baffle 3, put inner tank 2 between lifting plate 5, then fix baffle 3 on one end of installation frame 1 through bolt, when the ship body generates roll or pitch motion, through shock absorber 6 and lifting plate 5, longitudinal damping is carried out to inner tank 2, through shock-absorbing buffer assembly 7, transverse damping is carried out, prevent the impact force generated by shaking from causing certain damage to containment system, cause further sloshing of liquefied natural gas in inner tank 2, reduce the evaporation rate of liquefied natural gas, improve the damping effect.

[0024] As Figure 2 With Figure 3As shown, the damping buffer assembly 7 comprises a first buffer spring 701 and a damping telescopic rod 702, and a circular groove is formed on both sides of one end of the mounting plate 4, the damping telescopic rod 702 is fixedly installed in the circular groove, a buffer plate 703 is fixedly installed at the free end of the damping telescopic rod 702, one end of the buffer plate 703 is in contact with the inner tank 2, the first buffer spring 701 is sleeved outside the damping telescopic rod 702, one end of the first buffer spring 701 is fixedly installed in the circular groove, the other end of the first buffer spring 701 is fixedly connected with the buffer plate 703, a buffer pad 704 made of rubber is fixedly installed at the end of the buffer plate 703 away from the first buffer spring 701, a square groove 705 is formed on both sides of the end of the mounting plate 4 close to the buffer plate 703, a guide rod 706 is arranged in the square groove 705, a sliding block 707 is sleeved outside the guide rod 706, a square plate 708 is hingedly connected to one end of the sliding block 707, one end of the square plate 708 is hingedly connected with the buffer plate 703, a second buffer spring 709 is sleeved outside the guide rod 706, one end of the second buffer spring 709 is arranged in the square groove 705, and the other end of the second buffer spring 709 is fixedly connected with the sliding block 707. In use, when the ship body generates a rolling motion, the inner tank 2 is first subjected to preliminary lateral damping by the buffer plate 703 and the first buffer spring 701, at this time the damping telescopic rod 702 is contracted, the frictional force generated inside can offset the elastic potential energy of the first buffer spring 701, so as to avoid that the first buffer spring 701 drives the inner tank 2 to repeatedly shake, when the impact force is large, the square plate 708 moves to one side, the sliding block 707 moves to one side in the square groove 705, the guide rod 706 plays a limiting role, the second buffer spring 709 is compressed, further lateral damping is performed through the deformation force generated by the second buffer spring 709, and further shaking of liquid goods in the inner tank 2 is prevented, so that the damping effect is good.

[0025] As shown in the figure, Figure 5 With Figure 6 As shown, a circular tube 710 is fixedly installed in the middle of one end of the mounting plate 4, a piston 712 having a push rod 711 installed at one end is slidably installed in the circular tube 710, one end of the push rod 711 is fixedly connected with the buffer plate 703, a rectangularly distributed inflatable air bag 713 is fixedly installed at one end of the mounting plate 4, and one end of the circular tube 710 is connected with the inflatable air bag 713 through a gas conveying pipe 714. In use, when the impact force is too large, the buffer plate 703 drives the push rod 711 to move to one side, so that the piston 712 moves in the circular tube 710, the inflatable air bag 713 is inflated through the gas conveying pipe 714, contacts the inner tank 2, and blocks the further movement of the inner tank 2.

[0026] The above-mentioned is only the embodiment of the present application, and the common knowledge of the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled person in the art can improve and implement the present application under the inspiration of the present application, and some typical known methods should not be an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that, for those skilled in the art, without departing from the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode in the specification can be used to explain the content of the claims.

Claims

1. A multi-directional containment shock absorption system for a liquid tank of an LNG ship, comprising mounting frames distributed front and back, inner tank cans and baffle plates, the baffle plates being detachably connected at both ends of the mounting frames, mounting plates being symmetrically installed between the mounting frames, characterized in that: The lifting plates are symmetrically arranged at the inner sides of the two ends of the mounting frame, shock absorbers are fixedly arranged at the two sides of one end of the lifting plates, one end of the shock absorbers is fixedly connected with the mounting frame, and the inner tank is arranged between the lifting plates to longitudinally absorb shock of the inner tank through the shock absorbers and the lifting plates; The mounting plate is internally provided with a shock-absorbing and buffering assembly, the shock-absorbing and buffering assembly comprises a first buffering spring and a damping telescopic rod, circular grooves are formed at the two sides of one end of the mounting plate, the damping telescopic rod is fixedly arranged in the circular grooves, a buffering plate is fixedly arranged at the free end of the damping telescopic rod, and one end of the buffering plate is in contact with the inner tank; square grooves are formed at the two sides of one end of the mounting plate, guide rods are fixedly arranged in the square grooves, sliding blocks are sleeved on the outer sides of the guide rods, square plates are hingedly arranged at one end of the sliding blocks, and one end of the square plates is hingedly connected with the buffering plate; the first buffering spring is sleeved on the outer side of the damping telescopic rod, one end of the first buffering spring is fixedly arranged in the circular grooves, and the other end of the first buffering spring is fixedly connected with the buffering plate; the second buffering spring is sleeved on the outer side of the guide rod, one end of the second buffering spring is fixedly arranged in the square grooves, and the other end of the second buffering spring is fixedly connected with the sliding block.

2. The LNG carrier tank multi-azimuth containment damping system of claim 1, wherein: One end of the buffering plate is fixedly provided with a buffering pad, and the buffering pad is made of rubber.

3. The LNG carrier tank multi-azimuth containment damping system of claim 2, wherein: A circular tube is fixedly arranged at the inner middle position of one end of the mounting plate, a piston with a push rod arranged at one end is slidingly arranged in the circular tube, and one end of the push rod is fixedly connected with the buffering plate.

4. The LNG carrier tank multi-azimuth containment damping system of claim 3, wherein: A rectangular inflatable air bag is fixedly arranged at one end of the mounting plate, and one end of the circular tube is in communication with the inflatable air bag through a gas conveying pipe.

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