Anti-swing supporting structure for low-temperature immersed pump matched with LNG (Liquefied Natural Gas) ship and floating device

Abstract

The utility model discloses an anti-swing supporting structure for a low-temperature immersed pump matched with an LNG (Liquefied Natural Gas) ship and a floating device, and relates to the technical field of pump body installation, in particular to the anti-swing supporting structure for the low-temperature immersed pump matched with the LNG ship and the floating device. The anti-swing supporting structure of the pump comprises a pump support and a sliding support. The top end of the pump support is connected with the top end of the pump through a fastener, and the bottom end of the pump support is connected with the top end of the pump tower support through a fastener. And the sliding bracket is arranged on the pump bracket and is fixedly connected with the bottom of the pump. According to the technical scheme, the problems that in the prior art, due to the fact that a pump and a pump frame are made of different materials, shrinkage stress generated in the low-temperature environment is different, the service life of the support is shortened, the connecting position is prone to loosening in the ship swinging state, and the risk that falling fasteners enter the pump along with media exists are solved. And parts such as an inducer and an impeller are damaged.

Description

Technical Field

[0001] The utility model discloses an anti-sway support structure for a cryogenic submersible pump for an LNG ship and a floating device, relates to the technical field of pump body installation, and in particular to an anti-sway support structure for a cryogenic submersible pump for an LNG ship and a floating device. Background Art

[0002] Currently, cryogenic pumps are required to transport cryogenic media aboard LNG (liquefied natural gas) vessels and floating installations. Due to the low temperature, flammability, explosiveness, and rapid vaporization of this medium, pump equipment required to transport this medium must possess reliable sealing, minimize vaporization, and possess a safe, stable, and reliable structure. Such pumps are challenging to design, manufacture, and test. Consequently, China currently relies on imports of these vertical cryogenic marine submersible pumps, which are subject to high prices and inadequate technical support. Domestication of vertical cryogenic marine submersible pump equipment would facilitate cost control in LNG transportation, expand the application of vertical cryogenic marine submersible pumps in projects such as propane and ethylene, and improve the design and manufacturing capabilities of large-scale cryogenic submersible pumps in China. However, no domestic manufacturer specializes in the development and production of large-scale cryogenic marine submersible pumps. Consequently, no specialized domestic manufacturer manufactures the anti-sway support structures required for these pumps.

[0003] In the prior art, fixed brackets are used to connect the pump to the pump tower. Because both the pump and the pump tower are simultaneously immersed in LNG, the pump casing and the pump tower are made of different materials with different shrinkage coefficients at low temperatures, resulting in different radial and axial shrinkage of the pump casing and the pump tower. Furthermore, under the influence of ocean surges, the pump and pump tower sway, making the connection susceptible to loosening. Therefore, the prior art's use of fixed brackets to connect the pump to the pump tower fails to address the issue of varying shrinkage at low temperatures. The stress generated by this shrinkage reduces the bracket's service life. Furthermore, the prior art fails to address the issue of loosening of the connection during swaying conditions. If fasteners fall, there is a risk that they, along with the medium, will enter the pump interior, damaging components such as the inducer and impeller.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new type of anti-sway support structure for LNG ships and floating devices supporting cryogenic submersible pumps, so as to overcome the problems existing in the prior art. Summary of the Invention

[0005] According to the above-mentioned prior art, due to the different materials of the pump and the pump frame, the shrinkage stress generated in a low-temperature environment is different, which will reduce the service life of the bracket. When the ship is swaying, the connection is easy to loosen, and there is a risk that the dropped fasteners will enter the pump with the medium, causing damage to the inducer, impeller and other parts. A technical problem is proposed, and an anti-sway support structure for a low-temperature submersible pump for an LNG ship and a floating device is provided. The utility model mainly solves the problem of different shrinkage amounts of the pump casing and the pump tower bracket under low-temperature conditions by setting oblong holes at the bolt connection. Under low-temperature conditions, the pump tower bracket can slide radially and axially, thereby reducing the stress caused by deformation; the sliding bracket is connected to the lower part of the pump by a stud, and the sliding bracket is fixed to the pump tower bracket by bolts. Through the above connection, the pump and the pump tower bracket can be firmly fixed to the pump tower bracket; the connecting fasteners are locked with steel wire to prevent the fasteners from loosening or falling off during swaying and surge.

[0006] The technical means adopted by this utility model are as follows:

[0007] An anti-sway support structure for a cryogenic submersible pump for an LNG ship or a floating device, comprising: a pump tower support, and a pump mounted on the upper portion of the pump tower support;

[0008] Furthermore, two sets of anti-sway support structures are arranged symmetrically along the pump axis;

[0009] Furthermore, the bottom of the anti-sway support structure is connected to the bottom of the pump and the top of the pump tower bracket by fasteners;

[0010] Furthermore, the side of the anti-sway support structure is connected to the side of the pump by fasteners;

[0011] Furthermore, the top of the anti-sway support structure is connected to the top end of the pump via fasteners.

[0012] Furthermore, the anti-sway support structure includes: a pump bracket, a sliding bracket;

[0013] Furthermore, the top end of the pump bracket is connected to the top end of the pump via a fastener, and the bottom end is connected to the top end of the pump tower bracket via a fastener;

[0014] Furthermore, the sliding bracket is mounted on the pump bracket via fasteners and is connected to the bottom of the pump via fasteners.

[0015] Furthermore, the pump bracket includes: an upper connecting plate a, a side connecting plate a, and a lower connecting plate a;

[0016] Furthermore, the upper connecting plate a is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the side connecting plate a is an arc-shaped plate structure, on the lower portion of which a plurality of screw holes for assembling the sliding bracket are provided; the lower connecting plate a is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the upper connecting plate a and the lower connecting plate a are horizontally fixed to the upper and lower ends of the side connecting plate a by welding;

[0017] Furthermore, the upper connecting plate a is fixedly connected to the upper end of the pump through a stud nut A, and the nut is locked with a steel wire to prevent loosening; the lower connecting plate a is fixedly connected to the top of the pump tower bracket through a stud nut E, and the stud nut is locked with a steel wire to prevent loosening.

[0018] Furthermore, the bolt hole is set as an oblong hole, which can be adjusted according to the installation position. Under low temperature conditions, the shrinkage difference caused by the different shrinkage amounts of the pump and the pump tower can be adjusted through the oblong hole to reduce the stress caused by deformation.

[0019] Furthermore, the pump bracket is provided with side ribs a and ribs a;

[0020] Furthermore, the rib plate a is arranged in the middle position outside the pump bracket, and its vertical end is connected to the side connecting plate a by welding, and its upper and lower ends are respectively connected to the upper connecting plate a and the lower connecting plate a by welding;

[0021] Furthermore, there are two side ribs a, which are respectively arranged on both sides of the outside of the pump bracket, and their vertical ends are connected to the side connecting plates a by welding, and their upper and lower ends are respectively connected to the upper connecting plate a and the lower connecting plate a by welding.

[0022] Furthermore, an adjusting bolt is provided at the connection between the lower connecting plate a and the pump tower bracket, and the height of the pump is adjusted by adjusting the bolt to adjust the gap between the liquid outlet pipe flange and the pump outlet flange.

[0023] Furthermore, the sliding bracket includes: a side connecting plate b, a lower connecting plate b;

[0024] Furthermore, the lower connecting plate b is a fan-shaped plate structure with multiple screw holes evenly distributed thereon;

[0025] Furthermore, the side connecting plate b is an arc-shaped plate structure, and is provided with a plurality of screw holes;

[0026] Furthermore, the lower connecting plate b is fixedly connected to the bottom end of the side connecting plate b by welding;

[0027] Furthermore, the side connecting plate b is fixedly connected to the side connecting plate a by means of stud nuts D, and the stud nuts are locked with steel wire to prevent loosening;

[0028] Furthermore, the lower connecting plate b is fixedly connected to the bottom of the pump through a stud nut B, and the nut is locked with a steel wire to prevent loosening.

[0029] Furthermore, the bolt hole is set as an oblong hole, which can be adjusted according to the installation position. Under low temperature conditions, the radial position can be adjusted through the oblong hole due to the shrinkage difference caused by the different shrinkage amounts of the pump and the pump bracket, thereby reducing the stress caused by deformation.

[0030] Furthermore, the sliding bracket is also provided with a side rib plate b and a rib plate b;

[0031] Furthermore, two side ribs b are respectively provided on both sides of the side connecting plate b, the side ends of the side ribs b are connected to the side connecting plate b by welding, and the bottom ends are connected to the lower connecting plate b by welding;

[0032] Furthermore, the side rib plate b is fixedly connected to the side rib plate a by stud nuts C, and the stud nuts are locked with steel wire to prevent loosening;

[0033] Furthermore, the rib plate b is fixedly installed between the side rib plate b and the side connecting plate b by welding.

[0034] Compared with the prior art, the utility model has the following advantages:

[0035] 1. The anti-sway support structure for cryogenic submersible pumps used in LNG ships and floating devices provided by this utility model has an oblong hole provided at the connection between the pump bracket and the pump tower bracket, which enables axial sliding in the low-temperature contraction state, thus solving the problem of different axial contraction amounts of the pump and the pump tower bracket.

[0036] 2. The anti-sway support structure for cryogenic submersible pumps used on LNG ships and floating devices provided by the utility model has an oblong hole provided at the connection between the sliding bracket and the pump bracket, which enables radial sliding in the low-temperature contraction state, thus solving the problem of different radial contraction amounts of the pump and the pump tower bracket.

[0037] 3. The anti-sway support structure for cryogenic submersible pumps used on LNG ships and floating devices provided by this utility model uses steel wire locks to prevent fasteners from loosening or falling off during swaying and surges, thereby reducing the risk of fasteners entering the pump body along with the medium and causing damage to rotating parts.

[0038] 4. The anti-sway support structure for cryogenic submersible pumps used in LNG ships and floating devices provided by the present invention has an adjusting bolt installed at the connection between the pump bracket and the pump tower bracket. The position of the pump is adjusted by adjusting the bolt, and the gap between the liquid outlet pipe flange and the pump outlet flange is adjusted.

[0039] 5. The utility model provides an anti-sway support structure for a cryogenic submersible pump for an LNG ship or a floating device. The pump bracket is arranged symmetrically on both sides and is firmly connected to the pump cover and the pump tower bracket. The pump and the pump bracket can be firmly fixed on the pump tower bracket, thereby improving the safety of the pump and extending the service life of the pump and the pump tower.

[0040] In summary, the technical solution of the present invention solves the problem in the prior art that due to the different materials of the pump and the pump frame, the shrinkage stress generated in a low-temperature environment is different, which will reduce the service life of the bracket, and the connection is easy to loosen when the ship is swaying. There is a risk of fallen fasteners entering the pump with the medium, causing damage to parts such as the inducer and impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 This is a schematic diagram of the structure of the utility model;

[0043] Figure 2 For this utility model Figure 1 Top view;

[0044] Figure 3 This is a schematic diagram of the anti-sway support structure of the utility model;

[0045] Figure 4 For this utility model Figure 3 Side view;

[0046] Figure 5 For this utility model Figure 3 Part I enlarged view;

[0047] Figure 6 This is a schematic diagram of the structure of the pump bracket of the utility model;

[0048] Figure 7 For this utility model Figure 6 Side view;

[0049] Figure 8 For this utility model Figure 6 Top view;

[0050] Figure 9 This is a schematic diagram of the structure of the sliding bracket of the utility model;

[0051] Figure 10 For this utility model Figure 9Side view;

[0052] Figure 11 For this utility model Figure 9 Top view.

[0053] In the figure: 1, pump bracket 2, sliding bracket 3, stud nut A4, stud nut B6, stud nut D7, adjusting bolt 8, stud nut E9, wire lock 11, upper connecting plate a12, side connecting plate a13, side rib plate a14, rib plate a15, lower connecting plate a16, side connecting plate b17, lower connecting plate b18, side rib plate b19, rib plate b. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0058] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the protection scope of the present application: the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0059] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0060] In addition, it should be noted that the use of "first", "second" and the like words to limit parts, only for the convenience of distinguishing the corresponding parts, if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0061] AsFigures 1-2 As shown, the utility model provides an anti-sway support structure for a cryogenic submersible pump for an LNG ship and a floating device, comprising: a pump tower bracket, and a pump mounted on the upper part of the pump tower bracket; two sets of anti-sway support structures are arranged axially symmetrically with the pump; the bottom of the anti-sway support structure is connected to the bottom of the pump and the top of the pump tower bracket by fasteners; the side of the anti-sway support structure is connected to the side of the pump by fasteners; and the top of the anti-sway support structure is connected to the top of the pump by fasteners.

[0062] like Figures 3-5 As shown, the anti-sway support structure includes: a pump bracket 1 and a sliding bracket 2; the top of the pump bracket 1 is connected to the top of the pump through fasteners, and the bottom end is connected to the top of the pump tower bracket through fasteners; the sliding bracket 2 is installed on the pump bracket 1 through fasteners and connected to the bottom of the pump through fasteners.

[0063] like Figures 6-8 As shown, the pump bracket 1 includes: an upper connecting plate a11, a side connecting plate a12, and a lower connecting plate a15; the upper connecting plate a11 is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the side connecting plate a12 is an arc-shaped plate structure, on the lower part of which a plurality of screw holes for assembling the sliding bracket 2 are evenly distributed; the lower connecting plate a15 is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the upper connecting plate a11 and the lower connecting plate a15 are horizontally fixed to the upper and lower ends of the side connecting plate a12 by welding; the upper connecting plate a11 is fixedly connected to the upper end of the pump by a stud nut A3, and the nut is prevented from loosening by a steel wire lock wire 9; the lower connecting plate a15 is fixedly connected to the top of the pump tower bracket by a stud nut E8, and the stud nut is prevented from loosening by a steel wire lock wire 9.

[0064] like Figures 6-8 As shown, the pump bracket 1 is also provided with a side rib a13 and a rib a14; the rib a14 is arranged in the middle position of the outer side of the pump bracket 1, and its vertical end is connected to the side connecting plate a12 by welding, and its upper and lower ends are respectively connected to the upper connecting plate a11 and the lower connecting plate a15 by welding; there are two side ribs a13, which are respectively arranged at both sides of the outer side of the pump bracket 1, and its vertical end is connected to the side connecting plate a12 by welding, and its upper and lower ends are respectively connected to the upper connecting plate a11 and the lower connecting plate a15 by welding.

[0065] like Figure 5 As shown, an adjusting bolt 7 is provided at the connection between the lower connecting plate a15 and the pump tower bracket, and the height of the pump is adjusted by adjusting the bolt 7 so as to adjust the gap between the liquid outlet pipe flange and the pump outlet flange.

[0066] like Figures 9-11As shown, the sliding bracket 2 includes: a side connecting plate b16 and a lower connecting plate b17; the lower connecting plate b17 is a fan-shaped plate structure with multiple screw holes evenly distributed thereon; the side connecting plate b16 is an arc-shaped plate structure with multiple screw holes provided thereon; the lower connecting plate b17 is fixedly connected to the bottom end of the side connecting plate b16 by welding; the side connecting plate b16 is fixedly connected to the side connecting plate a12 by a stud nut D6, and the stud nut is prevented from loosening by a steel wire lock 9; the lower connecting plate b17 is fixedly connected to the bottom of the pump by a stud nut B4, and the nut is prevented from loosening by a steel wire lock 9.

[0067] like Figures 9-11 As shown, the sliding bracket 2 is also provided with a side rib plate b18 and a rib plate b19; the two side rib plates b18 are respectively arranged on both sides of the side connecting plate b16, and the side ends of the side rib plates b18 are connected to the side connecting plate b16 by welding, and the bottom ends are connected to the lower connecting plate b17 by welding; the side rib plates b18 are fixedly connected to the side rib plates a13 by stud nuts C5, and the stud nuts are prevented from loosening by steel wire lock wire 9; the rib plate b19 is fixedly installed between the side rib plate b18 and the side connecting plate b16 by welding.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-sway support structure for a cryogenic submersible pump used on an LNG carrier or floating device, comprising: A pump tower support and a pump mounted on the upper portion of the pump tower support; characterized in that: The pump has two sets of anti-sway support structures arranged symmetrically along its axis; The bottom of the anti-sway support structure is connected to the bottom of the pump and the top of the pump tower bracket by fasteners; The side of the anti-sway support structure is connected to the side of the pump via fasteners; The top of the anti-sway support structure is connected to the top of the pump via fasteners; The anti-sway support structure comprises: a pump bracket (1), a sliding bracket (2); The top end of the pump bracket (1) is connected to the top end of the pump via a fastener, and the bottom end is connected to the top end of the pump tower bracket via a fastener; The sliding bracket (2) is mounted on the pump bracket (1) via fasteners and is connected to the bottom of the pump via fasteners; The pump bracket (1) comprises an upper connecting plate a (11), a side connecting plate a (12), and a lower connecting plate a (15); The upper connecting plate a (11) is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the side connecting plate a (12) is an arc-shaped plate structure, on the lower portion of which a plurality of screw holes for assembling the sliding bracket (2) are provided; the lower connecting plate a (15) is a fan-shaped plate structure, on which a plurality of screw holes are evenly distributed; the upper connecting plate a (11) and the lower connecting plate a (15) are horizontally fixed to the upper and lower ends of the side connecting plate a (12) in a welded manner; The upper connecting plate a (11) is fixedly connected to the upper end of the pump through a stud nut A (3), and the nut is prevented from loosening by a steel wire lock (9); the lower connecting plate a (15) is fixedly connected to the top end of the pump tower bracket through a stud nut E (8), and the stud nut is prevented from loosening by a steel wire lock (9); The sliding bracket (2) comprises: a side connecting plate b (16), a lower connecting plate b (17); The lower connecting plate b (17) is a fan-shaped plate structure with a plurality of screw holes evenly distributed thereon; The side connecting plate b (16) is an arc-shaped plate structure, and is provided with a plurality of screw holes; The lower connecting plate b (17) is fixedly connected to the bottom end of the side connecting plate b (16) by welding; The side connecting plate b (16) is fixedly connected to the side connecting plate a (12) via a stud nut D (6), and the stud nut is prevented from loosening by a steel wire lock (9); The lower connecting plate b (17) is fixedly connected to the bottom of the pump via a stud nut B (4), and the nut is secured against loosening by a steel wire lock (9).

2. The anti-sway support structure for a cryogenic submersible pump for an LNG carrier and a floating device according to claim 1, characterized in that: The pump bracket (1) is further provided with a side rib a (13) and a rib a (14); The rib plate a (14) is arranged at the middle position outside the pump bracket (1), and its vertical end is connected to the side connecting plate a (12) by welding, and its upper and lower ends are respectively connected to the upper connecting plate a (11) and the lower connecting plate a (15) by welding; There are two side ribs a (13), which are respectively arranged at two sides of the outside of the pump bracket (1), and their vertical ends are connected to the side connecting plate a (12) by welding, and their upper and lower ends are respectively connected to the upper connecting plate a (11) and the lower connecting plate a (15) by welding.

3. The anti-sway support structure for a cryogenic submersible pump for an LNG carrier and a floating device according to claim 1, characterized in that: An adjusting bolt (7) is provided at the connection between the lower connecting plate a (15) and the pump tower bracket, and the height of the pump is adjusted by adjusting the adjusting bolt (7) so as to adjust the gap between the liquid outlet pipe flange and the pump outlet flange.

4. The anti-sway support structure for a cryogenic submersible pump for an LNG carrier and a floating device according to claim 1, characterized in that: The sliding bracket (2) is further provided with a side rib plate b (18) and a rib plate b (19); The two side ribs b (18) are respectively arranged on both sides of the side connecting plate b (16), the side ends of the side ribs b (18) are connected to the side connecting plate b (16) by welding, and the bottom ends are connected to the lower connecting plate b (17) by welding; The side rib plate b (18) is fixedly connected to the side rib plate a (13) via a stud nut C (5), and the stud nut is prevented from loosening by a steel wire lock (9); The rib plate b (19) is fixedly mounted between the side rib plate b (18) and the side connecting plate b (16) by welding.

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