Grating, self-circulation system and ship system

Abstract

The present application provides a kind of grid, self-circulation system and ship system, the grid includes: mounting frame and several bars;Mounting frame is used to be connected with import pipeline;Several bars are evenly arranged in the mounting frame, and the two ends of several bars are connected with the mounting frame respectively;The cross section of the bar is in the shape of a teardrop, the large end of the teardrop shape is the flow face;In the case of fluid passing, the fluid can flow from the large end to the small end of the teardrop shape.The present application reduces vortex shedding at the small end of the bar when the fluid separates from the grid, reduces fluid excitation, and reduces system radiation noise.The present application does not change the original installation structure of the grid, has small changes to the pipeline of the ship system, has simple structure, and is easy to install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship design, and in particular to a grille, a self-flow circulation system and a ship system. BACKGROUND

[0002] The seawater cooling system is one of the most important components of a ship system, and the traditional seawater cooling system uses a pump to drive fluid movement, which generates a large amount of radiation noise, and has not met the requirements of modern quiet ships, so the seawater self-flow cooling method has become the preferred configuration for reducing noise of the current ship. The self-flow cooling system uses the pressure difference generated by the relative movement of water and the ship body during the ship sailing to drive the cooling water to flow in the pipeline. Generally, the inlet of the self-flow system is directly opposite the flow surface, and after the cooling water enters the pipeline, it flows through the heat exchanger and then flows out of the ship body through the discharge pipeline, forming a cooling circulation system. In order to guide the flow of the fluid entering the pipeline and filter large-sized impurities into the pipeline, a grille is generally arranged at the inlet of the self-flow pipeline.

[0003] However, the structure of the existing grille is unreasonable, when the relative speed of the ship and the water is large, the flow rate of the cooling water entering the self-flow pipeline is large, and when the cooling water flows through the grille, a relatively strong turbulent flow is generated, thereby generating a large fluid excitation, which is easy to excite a large vibration, generate a large radiation noise, and affect the quiet sailing of the ship. SUMMARY

[0004] The present application provides a grille, a self-flow circulation system and a ship system to solve the problem that the structure of the existing grille is unreasonable, and a large radiation noise is generated when a large flow rate of water flows through the grille, affecting the quiet sailing of the ship.

[0005] The present application provides a grille, comprising: a mounting frame and a plurality of grid bars; the mounting frame is used for connecting with an inlet pipeline; the plurality of grid bars are uniformly arranged in the mounting frame, and the two ends of the plurality of grid bars are connected with the mounting frame respectively; the cross section of the grid bar is in the shape of a water droplet, the large end of the water droplet is a flow surface; under the condition that a fluid passes through, the fluid can flow from the large end to the small end of the water droplet.

[0006] According to the grille provided by the present application, the two ends of the water droplet are both in the shape of a circular arc, and the radius of the circular arc of the large end is larger than the radius of the circular arc of the small end.

[0007] According to the grille provided by the present application, the large end is in the shape of a circular arc, and the small end is a sharp part.

[0008] According to the grille provided by the present application, the grille further comprises a plurality of magnetic pole strips and a plurality of electrode strips; along the length direction of the grid bar, the plurality of magnetic pole strips and the plurality of electrode strips are alternately arranged on the surface of the grid bar.

[0009] According to the grid provided by the application, the grid further comprises a plurality of insulation strips, the insulation strips are arranged between two adjacent magnetic pole strips and electrode strips; two sides of the insulation strips are respectively attached to opposite surfaces of the magnetic pole strips and the electrode strips.

[0010] According to the grid provided by the application, upper surfaces of the adjacent magnetic pole strips, the electrode strips and the insulation strips are smoothly connected.

[0011] According to the grid provided by the application, the magnetic pole strips and the electrode strips are profiled structures, lower surfaces of the magnetic pole strips and the electrode strips are matched with surfaces of the grid strips.

[0012] According to the grid provided by the application, lower surfaces of the plurality of magnetic pole strips and the plurality of electrode strips are respectively attached to surfaces of the grid strips.

[0013] The application further provides a self-flow circulation system, comprising: an inlet pipeline and the grid described in any one of the above.

[0014] The application further provides a ship system, comprising: the self-flow circulation system.

[0015] The grid, the self-flow circulation system and the ship system provided by the application have the following advantages: by setting the cross section of the grid strip into a water drop shape, the large end of the water drop shape is a flow-approaching surface, since the large end of the water drop shape is in the form of a circular arc, in the case of fluid passing through, the fluid can flow from the large end to the small end of the water drop shape, so that the fluid resistance of the flow-approaching surface is reduced, the flow line of the flow-approaching surface is smooth, the vortex shedding at the small end of the grid strip when the fluid separates from the grid strip is reduced, fluid excitation is reduced, and system radiation noise is reduced. The application does not change the original installation structure of the grid, has small changes to the pipeline of the ship system, has a simple structure form, and is easy to install. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0017] Figure 1 is a structural schematic diagram in the related art;

[0018] Figure 2 is a structural schematic diagram of a grid in the related art;

[0019] Figure 3 is a cross-sectional schematic diagram of a grid strip in the related art;

[0020] Figure 4 is a schematic view of a cross section of a grid bar provided by some embodiments of the present application;

[0021] Figure 5 is a schematic view of a structure of a grid bar provided by some embodiments of the present application.

[0022] Reference signs:

[0023] 100: grid; 110: mounting frame; 120: grid bar; 210: outlet pipeline; 220: heat exchanger; 230: inlet pipeline; 310: ship body. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “connected” and “connected” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0027] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] like Figure 1 As shown, the gravity-flow circulation system consists of inlet pipe 230, heat exchanger 220, and outlet pipe.

[0030] The system consists of 210 pipes. In a typical gravity-flow circulation system, the inlet faces the flow direction, and the cooling water enters...

[0031] After entering through inlet pipe 230, the fluid flows through heat exchanger 220, and then exits through outlet inlet pipe 230, forming a gravity-flow circulation. To guide the fluid entering inlet pipe 230 and to prevent large impurities from entering the pipe, a [specific feature] is typically placed at the inlet of inlet pipe 230.

[0032] The grille 100 is set, and the traditional structure of the grille 100 is as follows: Figure 2 Traditional grille 100 structure

[0033] cross-section as Figure 3 As shown. When the relative velocity between the hull 310 and the fluid is large, the cooling water...

[0034] The flow velocity entering the inlet pipe 230 is relatively high. When the cooling water flows through the grille 100, it will generate relatively strong turbulence, which will produce a large fluid excitation. This can easily cause large structural vibrations and generate large radiated noise, affecting the quiet navigation of the ship. Therefore, it is urgent to carry out research on fluid excitation suppression technology based on the grille 100.

[0035] In response, the present invention provides a bar screen, a self-flowing circulation system, and a ship system for use in order to

[0036] This addresses the problem that existing bar screens have an unreasonable structure, generating significant radiated noise when high-velocity water flows through them, thus affecting the quiet navigation of ships.

[0037] It should be noted that the grille of the present invention is an improvement on the traditional grille and can be applied to...

[0038] In various application scenarios, fluid pipelines are used to reduce the flow rate of high-velocity fluids as they pass through the pipeline.

[0039] The radiated noise when the grille is in use.

[0040] The fluid can be fresh water, seawater, airflow, etc.

[0041] The following is combined with Figures 1-5 The present invention describes the grille, the self-flowing circulation system, and the ship system.

[0042] like Figure 2 and Figure 4 As shown, the grille provided by the present invention includes: a mounting frame 110 and several...

[0043] The grid bars 120 and mounting frame 110 are used to connect to the inlet pipe 230; several grid bars 120 are evenly spaced.

[0044] Arranged within the mounting frame 110, with both ends of the grid strip 120 connected to the mounting frame 110 respectively; grid strip

[0045] The cross-section of 120 is teardrop-shaped, with the larger end of the teardrop being the flow-facing surface; when fluid passes through, the fluid can flow from the larger end to the smaller end of the teardrop.

[0046] The cross-section of the grid bar 120 includes a large end and a small end, which are smoothly connected to form a smooth outflow surface.

[0047] The cross-section of the grid structure in the related technology is as follows: Figure 3 As shown, the cross-section of the grid bar 120 is rectangular. When the fluid velocity flowing through the grid bar 120 is large, turbulence will be generated, which will increase the fluid excitation and increase the radiation noise of the inlet pipe 230 system.

[0048] The grille provided by the present application sets the cross section of the grid bars 120 as a water drop shape, the large end of the water drop shape is the flow-approaching surface, because the large end of the water drop shape is circular arc-shaped, in the case of fluid passing, the fluid can flow from the large end to the small end of the water drop shape, so that the fluid resistance of the flow-approaching surface is reduced, the flow line of the flow-escaping surface is smooth, the vortex shedding at the small end of the grid bar 120 when the fluid separates from the grille 100 is reduced, the fluid excitation is reduced, and the system radiation noise is reduced. The present application does not change the original installation structure of the grille 100, has small changes to the inlet pipeline 230 of the ship system, has a simple structure form, and is convenient to install.

[0049] The installation frame 110 is profiled, and the shape of the installation frame 110 matches the shape of the inlet pipeline 230.

[0050] If the cross section of the inlet pipeline 230 is circular, the installation frame 110 is circular, a plurality of grid bars 120 are uniformly arranged along the radial direction of the installation frame 110, and the installation frame 110 is taken as the center of symmetry, the length of the grid bar 120 is sequentially reduced, so that the two ends of the grid bar 120 are connected with the installation frame 110.

[0051] If the cross section of the inlet pipeline 230 is rectangular, the installation frame 110 is a rectangular frame, a plurality of grid bars 120 can be uniformly arranged along the length direction, the width direction or the extension direction of the diagonal of the installation frame 110, and the length of the grid bar 120 is set according to the length or the width of the installation frame 110.

[0052] The interval distance between the adjacent grid bars 120 is set according to the specific use scene, which is not limited in the present application.

[0053] The length of the grid bar 120 is set according to the distance between the opposite edges or adjacent edges of the installation frame 110, which is not limited in the present application.

[0054] The materials of the installation frame 110 and the plurality of grid bars 120 can be the materials known in the art, which will not be described herein.

[0055] The installation frame 110 and the plurality of grid bars 120 can be connected by the connection mode known in the art, for example, the installation frame 110 and the plurality of grid bars 120 can be connected by welding, clamping or one-piece forming.

[0056] In some embodiments, both ends of the water drop shape are circular arc-shaped, and the radius of the circular arc of the large end is greater than the radius of the circular arc of the small end.

[0057] In some embodiments, as shown in Figure 4 and Figure 5 the large end is circular arc-shaped and the small end is pointed.

[0058] The present application improves the traditional grid structure, and designs the cross section of the grid bar 120 as a water drop shape, so that the fluid resistance of the flow surface of the grid is reduced, and the flow lines of the flow surface of the grid bar 120 are smooth, so that the vortex shedding at the stern of the grid bar 120 when the fluid separates from the grid 100 is reduced, the fluid excitation is reduced, and the noise is reduced.

[0059] Further, as shown in Figure 5 The grid 100 further comprises a plurality of magnetic pole strips and a plurality of electrode strips; along the length direction of the grid bar 120, the plurality of magnetic pole strips and the plurality of electrode strips are alternately arranged on the surface of the grid bar 120.

[0060] It can be understood that in the case that the grid provided by the present application is applied to a fluid environment with weak conductivity, such as seawater, chemical solvents, sewage, etc., the grid provided by the present application can utilize the weak conductivity of the fluid, and when the fluid flows through the surface of the grid bar 120, the electromagnetic force is generated under the action of the electromagnetic field, and the fluid flowing through the surface of the grid bar 120 is rectified, so that the turbulent flow phenomenon generated on the surface of the grid 100 is inhibited, the fluid excitation is reduced, and the noise is further reduced.

[0061] Among them, the magnetic pole strips are divided into N pole strips and S pole strips, the electrode strips are divided into positive electrode strips and negative electrode strips, and the N pole strips, the S pole strips, the positive electrode strips and the negative electrode strips are staggered along the length direction of the grid bar 120.

[0062] In some embodiments, as shown in Figure 5 The N pole strips, the positive electrode strips, the S pole strips and the negative electrode strips are arranged in sequence to form a group of arrangement combinations, and a plurality of groups of arrangement combinations are arranged in sequence along the length direction of the grid bar 120.

[0063] When the fluid with weak conductivity flows through the surface of the grid bar 120, the fluid, the positive electrode strips and the negative electrode strips form a loop, and the movement of cutting the magnetic induction lines generates an electromagnetic force towards the surface of the grid bar 120, the electromagnetic force presses the fluid towards the surface of the grid bar 120, and the fluid flowing through the surface of the grid bar 120 is rectified, so that the turbulent flow phenomenon generated on the surface of the grid 100 is inhibited.

[0064] Further, the grid 100 further comprises a plurality of insulating strips, and the insulating strips are arranged between adjacent two magnetic pole strips and electrode strips; the two sides of the insulating strips are respectively attached to the opposite surfaces of the magnetic pole strips and the electrode strips, so that the magnetic pole strips and the electrode strips are tightly attached together, so as to avoid that the magnetic pole strips and the electrode strips on the surface of the grid bar 120 are scattered when the fluid flows through the grid bar 120.

[0065] Further, the upper surfaces of the adjacent magnetic pole strips, the electrode strips and the insulating strips are smoothly connected, so as to reduce the resistance of the fluid flowing through the grid bar 120.

[0066] Specifically, the upper surface of the magnetic pole strip is smoothly connected with the upper surface of the insulation strip, and the upper surface of the electrode strip is smoothly connected with the upper surface of the insulation strip.

[0067] The insulation strip can be an insulation material known in the art, such as resin, and the present application does not limit the same.

[0068] Further, the magnetic pole strip and the electrode strip are profiled structures, the lower surfaces of the magnetic pole strip and the electrode strip are matched with the surface of the grid strip 120 to form a water drop-shaped structure, so as to ensure that the fluid resistance of the flow surface of the grid strip 120 is small, the flow line of the outflow surface is smooth, the vortex shedding at the stern of the grid strip 120 when the fluid separates from the grid 100 is reduced, and the fluid excitation is reduced.

[0069] In some embodiments, the surface of the grid strip 120 is provided with a strip-shaped groove, the groove wall is made of insulation material, and the plurality of magnetic pole strips and the plurality of electrode strips are sequentially and alternately arranged in the strip-shaped groove, and the side wall and the lower surface of the magnetic pole strip and the side wall and the lower surface of the electrode strip are connected with the strip-shaped groove.

[0070] The connection mode can be adhesive connection, clamping connection or bolt connection.

[0071] In some embodiments, the lower surfaces of the plurality of magnetic pole strips and the plurality of electrode strips are respectively attached to the surface of the grid strip 120.

[0072] In the embodiment, the magnetic pole strip, the electrode strip and the surface of the grid strip 120 are closely attached together, so as to avoid that the magnetic pole strip and the electrode strip on the surface of the grid strip 120 are washed away when the fluid flows through the grid strip 120, and the service life is prolonged.

[0073] The number and size of the magnetic pole strip and the electrode strip can be set according to specific conditions.

[0074] The grid provided by the present application has the following advantages. On the one hand, the cross section of the grid strip 120 is designed as a water drop shape by improving the traditional grid strip structure, so that the fluid resistance of the flow surface of the grid is reduced, and the flow line of the outflow surface of the grid strip 120 is smooth, so that the vortex shedding at the stern of the grid strip 120 when the fluid separates from the grid 100 is reduced, the fluid excitation is reduced, and the noise is reduced. On the other hand, the magnetic pole strip and the electrode strip are alternately arranged on the surface of each grid strip 120, and the weak conductivity of the fluid is utilized. When the fluid flows through the surface of the grid strip 120, the electromagnetic force is generated under the action of the electromagnetic field, the fluid flowing through the surface of the grid strip 120 is rectified, the turbulent flow phenomenon generated on the surface of the grid 100 is suppressed, the fluid excitation is reduced, and the noise is further reduced. The present application does not change the original installation structure of the grid 100, the import pipeline 230 of the ship system is slightly changed, the structure form is simple, and the installation is convenient.

[0075] For example, Figure 1As shown, the application also provides a self-circulation system applied to a ship system, the self-circulation system comprising: an inlet pipeline 230 and any one of the above-mentioned gratings 100; the grating 100 is arranged at the inlet of the inlet pipeline 230.

[0076] The self-circulation system provided by the application has the following advantages: on the one hand, the cross section of the grating 120 is designed as a water droplet shape, so that the fluid resistance of the flow surface of the grating is reduced, and the flow lines of the outflow surface of the grating 120 are smooth, so that vortex shedding at the stern of the grating 120 when the fluid separates from the grating 100 is reduced, fluid excitation is reduced, and noise is reduced; on the other hand, the magnetic pole strip and the electrode strip are alternately arranged on the surface of each grating 120, and the weak conductivity of the fluid is utilized, so that electromagnetic force is generated under the action of the electromagnetic field when the fluid flows through the surface of the grating 120, the fluid flowing through the surface of the grating 120 is rectified, the turbulent flow phenomenon generated on the surface of the grating 100 is inhibited, fluid excitation is reduced, and noise is further reduced. The original installation structure of the grating 100 is not changed, the inlet pipeline 230 of the ship system is slightly changed, the structure is simple, and the installation is convenient.

[0077] As shown in the drawings, Figure 1 The application also provides a ship system comprising the above-mentioned self-circulation system.

[0078] The ship system provided by the application has the following advantages: on the one hand, the cross section of the grating 120 is designed as a water droplet shape, so that the fluid resistance of the flow surface of the grating is reduced, and the flow lines of the outflow surface of the grating 120 are smooth, so that vortex shedding at the stern of the grating 120 when the fluid separates from the grating 100 is reduced, fluid excitation is reduced, and noise is reduced; on the other hand, the magnetic pole strip and the electrode strip are alternately arranged on the surface of each grating 120, and the weak conductivity of the fluid is utilized, so that electromagnetic force is generated under the action of the electromagnetic field when the fluid flows through the surface of the grating 120, the fluid flowing through the surface of the grating 120 is rectified, the turbulent flow phenomenon generated on the surface of the grating 100 is inhibited, fluid excitation is reduced, and noise is further reduced. The original installation structure of the grating 100 is not changed, the inlet pipeline 230 of the ship system is slightly changed, the structure is simple, and the installation is convenient.

[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. A type of grille, characterized in that, include: Mounting frame for connection to inlet pipeline; Several grid bars are evenly arranged within the mounting frame, and both ends are connected to the mounting frame respectively; The cross-section of the grid bar is teardrop-shaped, and the larger end of the teardrop shape is the flow-facing surface; When fluid passes through, the fluid can flow from the large end to the small teardrop-shaped end; The grid also includes multiple magnetic pole strips and multiple electrode strips; Along the length of the grid bar, a plurality of magnetic pole bars and a plurality of electrode bars are alternately arranged on the surface of the grid bar.

2. The grille according to claim 1, characterized in that, Both ends of the teardrop shape are rounded, with the radius of the larger end being greater than the radius of the smaller end.

3. The grille according to claim 1, characterized in that, The larger end is arc-shaped, and the smaller end is pointed.

4. The grille according to claim 1, characterized in that, The grid also includes multiple insulating strips, which are disposed between two adjacent magnetic pole strips and electrode strips; the two sides of the insulating strips are respectively attached to the opposite surfaces of the magnetic pole strips and electrode strips.

5. The grille according to claim 4, characterized in that, The upper surfaces of adjacent magnetic pole strips, electrode strips, and insulating strips are smoothly connected.

6. The grille according to claim 4, characterized in that, The magnetic pole strip and the electrode strip have a contoured structure, and the lower surfaces of the magnetic pole strip and the electrode strip mate with the surface of the grid strip.

7. The grille according to claim 6, characterized in that, The lower surfaces of the plurality of magnetic pole strips and the plurality of electrode strips are respectively attached to the surface of the grid strip.

8. A self-flowing circulation system, characterized in that, include: The inlet pipe and the grille as described in any one of claims 1 to 7; The grille is installed at the inlet of the inlet pipe.

9. A ship system, characterized in that, include: The self-flowing circulation system of claim 8.

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