CN112648533A

CN112648533A - Spherical tank device and supporting structure thereof

Info

Publication number: CN112648533A
Application number: CN202011581080.6A
Authority: CN
Inventors: 崔振宁; 冯义浩; 吴家祥; 李肖蔚; 秦黎; 郭树平; 苏灵君; 董磊; 占双林; 邓海军
Original assignee: Beijing Dwell Petroleum & Gas Technology Development Co ltd; China National Petroleum Corp; China Petroleum Engineering and Construction Corp; China National Petroleum Corp Engineering Design Co Ltd
Current assignee: Beijing Dwell Petroleum & Gas Technology Development Co ltd; China National Petroleum Corp; China Petroleum Engineering and Construction Corp; China National Petroleum Corp Engineering Design Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-13

Abstract

A spherical tank device and a supporting structure thereof, the supporting structure comprising: a plurality of first tie rods; the supporting components comprise a strut foundation, two struts extending upwards from the strut foundation and second pull rods of which two ends are respectively connected with the two struts; wherein, a plurality of pillar bases are the ring and evenly arrange, and the top of two pillars on every pillar base is opened to the direction that is close to mutually with two pillar bases adjacent on this pillar base respectively, the pillar is to keeping away from the direction slope at the center of ring, the equal level of first pull rod and second pull rod sets up, and a plurality of first pull rods set up respectively between every two adjacent supporting component, and two pillars that are close to each other in two adjacent supporting component are connected respectively to the both ends of second pull rod. The supporting structure can play a role in stably supporting the spherical tank under wind load and earthquake load and reducing deformation.

Description

Spherical tank device and supporting structure thereof

Technical Field

The present invention relates to a gas or liquid medium storage technology, in particular, it relates to a spherical tank device and its supporting structure.

Background

In industrial production, a spherical tank is generally used for storing liquid hydrocarbons, compressed gases, and liquefied gases having a high saturated vapor pressure. The spherical tank has the advantages of uniform bearing capacity, good stress condition, large bearing volume and the like.

At home and abroad, the spherical tank is usually supported by using a vertical bracing strut, the strut is usually an equator welding type vertical strut, and the pull rod is usually adjustable or fixed. However, this type of strut has been associated with certain disadvantages that have resulted in a large design of the actual strut and tie rod geometry.

Fig. 1 illustrates a prior art spherical tank support structure 10, wherein the spherical tank support structure 10 is used to support a spherical tank 14. The spherical tank supporting structure 10 comprises a vertical pillar 12, an adjustable pull rod 13, a connecting lug plate 15 and a pile foundation 11. The column post 12 is vertically disposed. Each vertical support 12 is fixed to a pile foundation 11. A plurality of vertical struts 12 are arranged in a ring, the top ends of the vertical struts 12 being connected to the spherical tank 14. The equator 16 of the spherical tank 14 is a horizontal circle on the outer surface of the spherical tank 14. The equator 16 is located at the largest diameter in the top-to-bottom direction of the spherical tank 14. The vertical strut 12 is attached at the equator 16 of the spherical tank 14 and is tangent to the spherical tank 14 at the equator 16. Two adjustable pull rods 13 are arranged between every two adjacent vertical struts 12, two ends of each adjustable pull rod 13 are respectively connected with the two vertical struts 12, and the two adjustable pull rods 13 are arranged in a crossed mode. The adjustable pull rod 13 can be connected with the vertical support post 12 through a connecting lug plate 15 arranged on the vertical support post 12.

Such a spherical tank support structure 10 has the following disadvantages:

(1) the curvature radius change of the lower end connection part of the vertical strut is large, and the stress is highly concentrated at the position;

(2) the vertical support column is deformed into an irregular S shape under the double actions of internal pressure expansion and self-weight pressing, so that the bearing capacity of the support column is greatly reduced;

(3) the length-to-fineness ratio of the pull rod is too long, and the diameter and the length are higher after bending resistance calculation;

(4) every vertical support post all should set up a pile formula basis correspondingly, and the civil engineering is with high costs.

Another prior art support structure for a spherical tank is similar to the structure of the spherical tank support structure 10 described above, except that the vertical struts abut the lower regions of the equator of the spherical tank, and non-adjustable fixed tie rods are used instead of adjustable tie rods to connect the vertical struts together. The two crossed fixed pull rods are fixed together through the fixed plate.

Such a spherical tank support structure has the following disadvantages:

(1) the curvature change of the lower end connection part of the vertical strut is large, and meanwhile, the integral rigidity is large, so that the stress concentration degree of the lowest end is increased;

(3) the fixed pull rod needs a very large bending-resistant section, so the fixed pull rod is thick and heavy and has high manufacturing cost;

Disclosure of Invention

The application provides an adopt bearing structure of V-arrangement supporting component support spherical tank of slope can play firm support under wind load and earthquake load, reduces the effect of deflection. This bearing structure includes:

a plurality of first tie rods; and

the supporting assemblies comprise a strut foundation, a strut bottom plate arranged at the top of the strut foundation, two struts extending upwards from the strut bottom plate and second pull rods of which two ends are respectively connected with the two struts;

wherein, a plurality of pillar bases are the hoop and evenly arrange, and the top of two pillars on every pillar base is opened to the direction that is close to mutually with two pillar bases adjacent on this pillar base respectively, the pillar is to the radial outside direction slope along the spherical tank body, and the equal level of first pull rod and second pull rod sets up, and a plurality of first pull rods set up respectively between two adjacent supporting component, and two pillars that are close to each other in two adjacent supporting component are connected respectively to the both ends of second pull rod.

When the supporting column of the supporting structure supports the spherical tank body, the axial compression load borne by the supporting column is converted into the sum of lateral bending resistance load and axial compression load, the bending resistance load rises, and the compression load falls. The failure mode of the strut is converted from the integral instability under the pure axial high load into the integral instability and bending failure under the lower load, so that the load of the strut is more uniform. The stress peaks at the bottom ends of the struts are reduced. Therefore, the supporting structure can stably support the spherical tank body under wind load and earthquake load.

Meanwhile, because every two pillars are arranged on one pillar foundation, the number of the pillar foundations can be reduced, the civil engineering cost is reduced, and meanwhile, the control of settlement is facilitated. The axial compression load of the support is small, the anti-bending effect of the support can be fully exerted, and the geometric dimension of the support is reduced. The lateral load generated by the internal pressure expansion is converted from pure bending into bending and stretching, and the peak value of the bending stress is reduced. The first pull rod and the second pull rod only have axial tensile stress, and the diameters of the first pull rod and the second pull rod can be reduced.

In an exemplary embodiment, the distance between the top ends of two struts on the same support assembly is greater than the distance between the bottom ends of the two struts.

In an exemplary embodiment, the struts have an acute angle with a tangential direction of the ring formed by the strut bases, and the struts have an acute angle with a radial outward direction of the ring formed by the plurality of strut bases.

In an exemplary embodiment, the first tie rod is connected to the lower half of the strut and the first tie rod is connected to the upper half of the strut.

In an exemplary embodiment, each of the pillars is provided with a first lug and a second lug, two ends of the first pull rod are respectively connected to the first lugs of the two pillars, and two ends of the second pull rod are respectively connected to the second lugs of the two pillars.

In an exemplary embodiment, the bottom ends of two struts in the same support assembly are disposed adjacent to each other;

the supporting component further comprises a connecting rib plate, and two opposite sides of the connecting rib plate are respectively connected to the bottom ends of the two pillars in the same supporting component.

In an exemplary embodiment, the connecting rib is a V-shaped flat plate.

In an exemplary embodiment, the foundation of the post is cast of concrete.

The invention also provides a spherical tank device which comprises the supporting structure and the spherical tank body supported by the supporting structure.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

Fig. 1 is a schematic structural view of a spherical tank supporting structure in the related art;

FIG. 2 is a schematic view of a spherical tank body in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a support assembly in an embodiment of the present application.

Detailed Description

Fig. 2 shows a spherical tank device in the present embodiment. The spherical tank device comprises a support structure 2 and a spherical tank body 3. The spherical tank body 3 is arranged above the supporting structure 2, and the spherical tank body 3 is supported by the supporting structure 2. Such a support structure 2 comprises a plurality of first tie rods 21 and a plurality of support assemblies 22.

Each support assembly 22 includes a column base 221, a column base plate, two columns 222, and a second tie rod 223. The column foundation 221 may be a pile foundation, cast of concrete. A portion of the pillar base 221 is exposed to the ground and another portion is buried in the ground. The bottom plate of the support post is a steel plate. The pillar base plate is covered on the top surface of the pillar base 221. The foundation bolt may be used to connect the pillar base plate to the pillar base 221. The support posts 222 are straight bars. Two legs 222 extend from the top of the leg base 221. Both struts 222 are welded to the strut bottom plate. Thus, both the pillars 222 are fixed to the pillar base 221. The two legs 222 are arranged in a V-shape. The distance between the top ends of the two struts 222 is greater than the distance between the bottom ends of the two struts 222. The support post 222 is also inclined to the side away from the spherical tank body 3. The second pull rod 223 is a straight rod, the second pull rod 223 is horizontally arranged, and two ends of the second pull rod 223 are respectively connected with the two pillars 222. The second tie rod 223 may be connected to the upper half of the strut 222.

The plurality of strut bases 221 are uniformly distributed on the ground in an annular shape. Two adjacent pillar bases 221 are spaced apart from each other. As shown in fig. 3, the top ends of the two pillars 222 of each pillar base 221 are respectively opened toward the two pillar bases 221 adjacent to the pillar base 221, and an acute angle a is formed between the pillar 222 and the tangential direction of the circular ring formed by the pillar bases 221. Meanwhile, the pillars 222 are also inclined away from the center of the ring formed by the plurality of pillar bases 221, and an acute angle b is formed between the pillars 222 and the radially outward direction of the ring formed by the plurality of pillar bases 221.

The first pull rod 21 is horizontally disposed. The number of the first tie rods 21 is the same as the number of the support members 22. In the present embodiment, the number of the support members 22 and the number of the first tie bars 21 are each 8. The plurality of first pull rods 21 are respectively arranged between every two adjacent supporting assemblies 22. Two ends of the first pull rod 21 are respectively connected with two adjacent support columns 222 in two adjacent support column 222 assemblies.

The spherical tank body 3 is supported by a plurality of support columns 222. The upper end of the support column 222 is connected to the tank plate of the spherical tank body 3. The connection point of the strut 222 on the spherical tank body 3 is located below the equator 31 of the spherical tank body 3. The particular location of the connection point may be determined by the degree to which the strut 222 is angled in a particular design.

When the support column 222 of the support structure 2 supports the spherical tank body 3, the axial compressive load borne by the support column 222 is converted into the sum of the lateral bending resistance load and the axial compressive load, the bending resistance load rises, and the compressive load falls. The failure mode of the strut 222 is converted from a purely axial high load global instability to a lower load global instability plus bending failure, making the strut 222 more uniformly loaded. Reducing the stress peaks at the bottom ends of struts 222. Therefore, the support structure 2 can stably support the spherical tank body 3 under wind load and earthquake load.

Meanwhile, as every two struts 222 are arranged on one strut foundation 221, the number of the strut foundations 221 can be reduced, the civil engineering cost is reduced, and the control of settlement is facilitated. The axial compressive load of the strut 222 is small, which can fully exert the anti-bending effect of the strut 222 and reduce the geometric dimension of the strut 222. The lateral load generated by the internal pressure expansion is converted from pure bending into bending and stretching, and the peak value of the bending stress is reduced. The first and

second tie rods

21 and 223 are only axially tensile stressed, and the diameters of the first and

second tie rods

21 and 223 can be reduced.

The inclination angle of the support column 222 is flexible and changeable, and can be adjusted according to the requirements of different liquid weights and loads, so that the axial stability and the lateral bending resistance can be balanced, and the size of the support column 222 is obviously reduced. The method has wide applicability under various different load combination working conditions.

In an exemplary embodiment, each strut 222 has a first lug 225 and a second lug 226 disposed thereon. First lug 225 and second lug 226 may be welded to post 222. The first ear 225 is disposed on a side of the same strut 22 from which the two struts 222 face away from each other. The second lug 226 is disposed on the side of the same support assembly 22 where the two legs 222 are adjacent to each other. The first lug 225 is located on the lower half of the strut 222 and the second lug 226 is located on the upper half of the strut 222. The end of the first link 21 is connected to the support 222 via a first lug 225, and the end of the second link 223 is connected to the support 222 via a second lug 226.

The support post 222 is connected with the first pull rod 21 and the second pull rod 223 through the first support lug 225 and the second support lug 226, respectively, so that the assembly between the support post 222 and the first pull rod 21 and the second pull rod 223 is more convenient and stable.

In an exemplary embodiment, support assembly 22 further includes an attachment web 224. The connecting rib 224 is flat. Connecting webs 224. The opposite sides of the connecting webs 224 are connected to two struts 222 of the same strut assembly 22. Connecting webs 224 are attached to the bottom ends of the struts 222. The connecting webs 224 may be V-shaped. The connection rib 224 and the strut 222 may be welded together.

The connecting webs 224 connect the two struts 222 together, further strengthening the structural strength of the two struts 222.

The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

Claims

1. A supporting structure for supporting a spherical tank by adopting an inclined V-shaped supporting component is characterized by comprising

A plurality of first tie rods; and

wherein, a plurality of pillar bases are the ring and evenly arrange in the below of spherical tank body, and the top of two spinal branch posts on every pillar base is opened to the direction that is close to mutually with two adjacent pillar bases on this pillar base respectively, the pillar is to the radial outside direction slope along the spherical tank body, and the equal level of first pull rod and second pull rod sets up, and a plurality of first pull rods set up respectively between two adjacent supporting component of every, and two pillars that are close to each other in two adjacent supporting component are connected respectively to the both ends of second pull rod.

2. The support structure of claim 1, wherein the distance between the top ends of two struts on the same support assembly is greater than the distance between the bottom ends of the two struts.

3. The support structure of claim 1, wherein the struts define an acute angle with a tangent of the circle defined by the strut bases, and wherein the struts define an acute angle with a radially outward direction of the circle defined by the plurality of strut bases.

4. The support structure of claim 1, wherein the first tie bar is connected to the lower half of the column and the first tie bar is connected to the upper half of the column.

5. The support structure of claim 4, wherein each support post is provided with a first support lug and a second support lug, two ends of the first pull rod are respectively connected to the first support lugs of the two support posts, and two ends of the second pull rod are respectively connected to the second support lugs of the two support posts.

6. A support structure as claimed in any one of claims 1 to 5, wherein the bottom ends of two legs in the same support assembly are located adjacent to each other;

7. The support structure according to claim 6, wherein the connecting rib plates are V-shaped steel plates.

8. The support structure of claim 1, wherein the column foundation is cast of concrete.

9. The support structure of claim 1, wherein the foundation pillar is connected to the foundation pillar by anchor bolts, and the foundation pillar is connected to the foundation pillar by welding.

10. A spherical tank arrangement comprising a support structure according to any of claims 1 to 9 and a spherical tank body supported by the support structure.