CN112829877A - Oscillation suppressing device for reducing impact load of liquid tank and liquid tank - Google Patents
Oscillation suppressing device for reducing impact load of liquid tank and liquid tank Download PDFInfo
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- CN112829877A CN112829877A CN202110112642.0A CN202110112642A CN112829877A CN 112829877 A CN112829877 A CN 112829877A CN 202110112642 A CN202110112642 A CN 202110112642A CN 112829877 A CN112829877 A CN 112829877A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an oscillation making device for reducing impact load of a liquid tank and the liquid tank, wherein the oscillation making device comprises at least two oscillation making plates, the two oscillation making plates are fixedly arranged on the bottom wall of the liquid tank and extend along the vertical direction, and two opposite side parts of each oscillation making plate are abutted and contacted with the side wall of the liquid tank. The oscillation plate is made of flexible materials and is provided with three arc-shaped sections, when the impact load of liquid is responded, elastic deformation can be generated, the impact load of the liquid can be absorbed, the liquid which is oscillated can climb upwards along the arc-shaped sections, the impact effect of the liquid is eliminated, and the oscillation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of ship transportation engineering, in particular to an oscillation suppressing device for reducing impact load of a liquid tank and the liquid tank.
Background
Under the condition that a liquid tank of the oil tanker is not fully filled with fluid, the fluid in the tank can generate a sloshing phenomenon, and the sloshing phenomenon has the characteristics of randomness, nonlinearity and the like. The oil tanker is not protected from the influence of extreme weather, wave impact and the like during navigation, and when the external excitation frequency is close to the natural frequency of the fluid in the tank, stronger impact load can be generated on the tank wall of the liquid tank, so that the stability of the navigation of the oil tanker is caused, and potential safety hazards can be caused to the whole structure of the oil tanker. In order to reduce the impact of the liquid on the tank wall, a heave plate is generally provided in the tank. The current oscillation plates are mainly divided into a fixed type and a floating type.
The fixed oscillation plate is a plate which is formed by fixing a horizontal plate, a vertical plate, an annular plate, a T-shaped plate or a combination of the horizontal plate, the vertical plate, the annular plate and the T-shaped plate on a bulkhead to reduce liquid oscillation impact pressure. Since the fixed oscillation plate cannot change with the change of the liquid loading rate in the tank, the oscillation has a limited range of action on the loading rate. When liquid in the liquid tank is loaded more, the oscillation plate plays a very small oscillation role, the oscillation plate is subjected to a large impact force, the liquid is still easy to oscillate, and the oscillation plate is easy to break and damage under the action of the large impact force of the liquid.
The floating oscillation plate is a plate which is placed on the free liquid surface and floats vertically or horizontally or in a combination mode of the vertical plate and the horizontal plate, so that the oscillation is realized. Although the floating oscillation plate can adapt to the change of different liquid carrying rates of the liquid tank, the floating state of the floating oscillation plate can easily collide the side wall and the tank top. In order to avoid collision, additional anti-collision protection equipment needs to be additionally arranged, so that complex manufacturing process and difficulty in installation and maintenance are brought.
Although the existing rigid oscillation plate can reduce the impact load of liquid in a liquid tank to a certain extent, the rigid oscillation plate cannot effectively eliminate or buffer the impact action of the liquid when dealing with the impact action of the liquid, and the liquid easily overflows the oscillation plate when oscillating in the liquid tank, so that the oscillation efficiency is low.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an oscillation device which can buffer and absorb liquid load in a liquid tank and has higher oscillation efficiency and the liquid tank with the oscillation device.
Therefore, the invention provides an oscillation device for reducing impact load of a liquid tank, which comprises at least two oscillation plates, wherein the two oscillation plates are fixedly arranged on the bottom wall of the liquid tank and extend along the vertical direction, two opposite side parts of each oscillation plate are abutted against and contacted with the side wall of the liquid tank, each oscillation plate is made of flexible materials, a plurality of damping holes penetrating through the oscillation plate are formed in each oscillation plate, the oscillation plates are fully distributed in the damping holes, each oscillation plate comprises a first arc-shaped section, a second arc-shaped section and a third arc-shaped section from bottom to top, the curvature radius of the first arc-shaped section is larger than that of the second arc-shaped section, and the curvature radius of the second arc-shaped section is larger than that of the third arc-shaped section.
Preferably, the height of the oscillation plate is 2/3-3/4 from the height of the bottom wall to the height of the top wall of the liquid tank.
Preferably, the thickness of the oscillation plate is 1.5-2 times of the thickness of the liquid cabin wall.
Preferably, the oscillation plates are provided in plurality and are arranged in the tank at equal intervals along the length direction of the tank.
Preferably, the aperture size of the damping hole is 10-15 mm.
The invention also provides a liquid tank which comprises a tank body, wherein the inner bottom wall of the tank body is provided with the oscillation suppressing device in any one of the technical schemes.
Preferably, be equipped with on the inner diapire of the cabin body and inlay and establish the recess, the bottom of making the swing board be equipped with inlay and establish recess matched with and inlay the portion of establishing.
Compared with the prior art, the invention has the following advantages:
1. the oscillation plate is made of flexible materials, and can elastically deform when dealing with the impact load of liquid, so that the impact load of the liquid is absorbed and converted into the elastic potential energy of the oscillation plate, the oscillation effect of the oscillation plate is improved, and the damage to the oscillation plate caused by the impact effect of the liquid can be avoided.
2. Make and sway board fixed mounting on liquid diapire, and its arc section that is equipped with the difference of three camber from bottom to top to when dealing with liquid impact, the liquid of shaking can be along the arc section climbing upward, further clears up the impact of liquid, plays the effect of buffering and clearing up to the impact load of liquid, further promotes to make and swings the effect.
3. Set up more than two and shake the board, and every is shaken and is covered with the damping hole on the board to when the impact of reply liquid, liquid can pass the damping hole, and flow back and forth between the board of shaking, alleviate the impact of liquid, make the flow of liquid tend to gently.
Drawings
FIG. 1 is a schematic structural view of a oscillation plate according to the present invention;
FIG. 2 is a schematic view of the structure of the oscillation plate shown in FIG. 1 installed in a tank;
wherein the drawings are illustrated as follows:
1. a swinging plate is manufactured; 2. a liquid tank; 3. a damping hole; 4. a first arcuate segment; 5. a second arcuate segment; 6. a third arc segment.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structures and implementations can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
The terms of orientation of upper, lower, top, bottom, inner, outer, and the like in the description are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed according to the position and the use state. Therefore, these and other directional terms should not be construed as limiting terms.
As shown in fig. 1 and 2, an oscillation device for reducing the impact load of a liquid tank comprises two oscillation plates 1, wherein the two oscillation plates 1 are fixedly arranged on the bottom wall of the liquid tank 2 and extend along the vertical direction, an embedding groove is formed in the inner bottom wall of the tank body, and an embedding part matched with the embedding groove is formed in the bottom of the oscillation plates 1.
The opposite side parts of each oscillation plate 1 are abutted and contacted with the side wall of the liquid tank 2, each oscillation plate 1 is made of flexible materials, a plurality of damping holes 3 penetrating through the oscillation plate 1 are formed in each oscillation plate 1, and the oscillation plates 1 are fully distributed in the damping holes 3. The oscillation plate is made of flexible materials, and can elastically deform when dealing with the impact load of liquid, so that the impact load of the liquid is absorbed and converted into the elastic potential energy of the oscillation plate, the oscillation effect of the oscillation plate is improved, the damage of the liquid to the oscillation plate can be avoided under the impact action of the liquid, and the oscillation plate has the effects of energy consumption and energy reduction.
Each oscillation plate 1 comprises a first arc-shaped section 4, a second arc-shaped section 5 and a third arc-shaped section 6 from bottom to top, the curvature radius of the first arc-shaped section 4 is larger than that of the second arc-shaped section 5, and the curvature radius of the second arc-shaped section 5 is larger than that of the third arc-shaped section 6. Make and sway board fixed mounting on liquid diapire, and its arc section that is equipped with the difference of three camber from bottom to top to when dealing with liquid impact, the liquid of shaking can be along the arc section climbing upward, further clears up the impact of liquid, plays the effect of buffering and clearing up to the impact load of liquid, further promotes to make and swings the effect.
In one embodiment, the height of the oscillation plate 1 is 2/3-3/4 from the bottom to the top of the tank 2. Can be specifically set according to the actual size of the liquid tank so as to adapt to the liquid tanks with different liquid carrying rates.
In a specific embodiment, the thickness of the oscillation plate 1 is 1.5-2 times of the thickness of the tank wall 2, so as to enhance the impact resistance of the oscillation plate 1.
In a specific embodiment, the oscillation plates 1 are provided in plurality, and the oscillation plates 1 are arranged in the tank 2 at equal intervals along the length of the tank 2, so as to improve oscillation efficiency and oscillation efficiency. In a specific embodiment, the diameter of the damping hole 3 is 10-15 mm. Set up more than two and shake the board, and every is shaken and is covered with the damping hole on the board to when the impact of reply liquid, liquid can pass the damping hole, and flow back and forth between the board of shaking, alleviate the impact of liquid, make the flow of liquid tend to gently. In other embodiments, damping holes may not be formed in the oscillation plate 1.
The liquid tank can be applied to transport ships such as oil tankers and the like, transport oil tank trucks such as liquefied natural gas and the like, and can be suitable for or applied to the liquid tank with the loading rate of 0-100%.
The working principle of the invention is realized as follows: the oscillation plate 1 is mounted on the bottom of the tank 2, and when the tank 2 is excited by external force at a frequency close to the natural frequency of the fluid in the tank, severe sloshing occurs, and the free liquid level caused by sloshing has a high velocity. The fluid strikes the oscillation plate 1 and then makes a climbing motion along the oscillation plate 1. Because the fluid has viscosity, the fluid needs to overcome the friction force between the fluid and the oscillation plate 1 to do work in the process of climbing movement, so that the kinetic energy of the fluid is reduced, and the oscillation purpose is achieved. It has been found that the oscillation effectiveness of the oscillation plate 1 is related to the height, thickness, shape and installation position thereof. The height of the oscillation plate influences the moving path of the fluid and the energy dissipated due to viscous action in the moving process, and the oscillation effect is more obvious when the height is larger in a certain range. The adoption has the system of radian to swing board 1 can increase the distance of fluid motion under the prerequisite that the height of board 1 was swung in not changing the system to increase the dissipation of kinetic energy, and the camber of the three segmental arc of system swing board 1 is supreme the reducing in proper order down, compares in the segmental arc of same camber, can further promote the system and swing the effect. The size and the porosity of the damping holes on the surface of the oscillation plate 1 are beneficial to reducing the structural damage of fluid to the wall of the liquid tank cabin and improving the stability of the liquid tank system. The oscillation plate is made of flexible materials, and from the energy conservation perspective, the kinetic energy of the fluid part can be absorbed and converted into the elastic potential energy of the plate, so that the oscillation effect is improved.
The technical scope of the present application is not limited to the contents in the above description, and those skilled in the art can make various changes and modifications to the above embodiments without departing from the technical spirit of the present application, and these changes and modifications should fall within the protective scope of the present application.
Claims (7)
1. An oscillation device for reducing impact load of a liquid tank comprises at least two oscillation plates (1), wherein the two oscillation plates (1) are fixedly arranged on the bottom wall of the liquid tank (2) and extend along the vertical direction, two opposite side parts of each oscillation plate (1) are abutted and contacted with the side wall of the liquid tank (2), it is characterized in that each oscillation plate (1) is made of flexible material, a plurality of damping holes (3) penetrating through the oscillation plate (1) are formed in each oscillation plate (1), the plurality of damping holes (3) are distributed on the oscillation plate (1), each oscillation plate (1) comprises a first arc-shaped section (4), a second arc-shaped section (5) and a third arc-shaped section (6) from bottom to top, the radius of curvature of the first arc-shaped section (4) is greater than the radius of curvature of the second arc-shaped section (5), the radius of curvature of the second arc-shaped section (5) is greater than the radius of curvature of the third arc-shaped section (6).
2. The device for reducing tank impact loads as set forth in claim 1, characterized in that the height of the oscillation plate (1) is 2/3-3/4 of the height from the bottom wall to the top wall of the tank (2).
3. The device for reducing tank impact loads according to claim 1, characterized in that the thickness of the oscillation plate (1) is 1.5-2 times the thickness of the tank wall of the tank (2).
4. Oscillation device for reducing tank impact loads according to claim 1, characterized in that the oscillation plate (1) is provided in plurality, and that a plurality of oscillation plates (1) are arranged in the tank (2) at equal intervals along the length of the tank (2).
5. The turbulence device for reducing tank impact loads as recited in claim 1, characterized in that the orifice size of the damping orifice (3) is 10-15 mm.
6. A tank comprising a body, characterized in that the inner bottom wall of the body is provided with an oscillation making device according to any one of the preceding claims 1 to 5.
7. The tank of claim 6, wherein the inner bottom wall of the tank body is provided with an embedding groove, and the bottom of the oscillation plate (1) is provided with an embedding part matched with the embedding groove.
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|---|---|---|---|
| CN202110112642.0A CN112829877B (en) | 2021-01-27 | 2021-01-27 | Oscillation device for reducing impact load of liquid tank and liquid tank |
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| CN202110112642.0A CN112829877B (en) | 2021-01-27 | 2021-01-27 | Oscillation device for reducing impact load of liquid tank and liquid tank |
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| CN112829877A true CN112829877A (en) | 2021-05-25 |
| CN112829877B CN112829877B (en) | 2023-08-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212186A (en) * | 2021-12-10 | 2022-03-22 | 哈尔滨工程大学 | Arc-shaped reinforced pressure bulkhead structure resisting bending of underwater explosion impact |
| CN114715558B (en) * | 2022-03-07 | 2023-07-04 | 江苏海洋大学 | Semi-active oscillation device and oscillation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212186A (en) * | 2021-12-10 | 2022-03-22 | 哈尔滨工程大学 | Arc-shaped reinforced pressure bulkhead structure resisting bending of underwater explosion impact |
| CN114715558B (en) * | 2022-03-07 | 2023-07-04 | 江苏海洋大学 | Semi-active oscillation device and oscillation method |
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| CN112829877B (en) | 2023-08-01 |
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