CN103942356A - Verification method of skid-mounted chemical plant framework structure - Google Patents
Verification method of skid-mounted chemical plant framework structure Download PDFInfo
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- CN103942356A CN103942356A CN201310740155.4A CN201310740155A CN103942356A CN 103942356 A CN103942356 A CN 103942356A CN 201310740155 A CN201310740155 A CN 201310740155A CN 103942356 A CN103942356 A CN 103942356A
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Abstract
The invention discloses a verification method of a skid-mounted chemical plant framework structure. The verification method of the skid-mounted chemical plant framework structure comprises the steps that (1) a tested skid-mounted framework model is obtained, a coordinate system is built according to the skid-mounted framework model, a horizontal plane is set as an XOY plane, and the direction of a vertical beam is the Z direction; (2) after the weight of all devices on the tested skid-mounted framework is obtained, the mass point of each device is simplified to the weight center, the mass points are loaded to a supporting surface by means of SOLIDWORKS software, and then the skid-mounted framework model is simplified into a finite element model; (3) static analysis is carried out on the skid-mounted framework model under different work conditions; (4) if the stress under different work conditions is within a permissible stress range and the maximum deflection of a cross beam does not exceed 1/300 of the length of the cross beam, the framework structure meets the design requirement. According to the verification method of the skid-mounted chemical plant framework structure, the work conditions which may occur in the use process of the skid-mounted structure can be calculated clearly, various work conditions are combined, and a precise result can be obtained.
Description
Technical field
The present invention relates to a kind of chemical plant skid mounted equipment, relate in particular to a kind of check method of skid framed structure.
Background technology
Along with the improvement upgrading in chemical plant, there is a kind of skid trend in detailed design of chemical plant, skid is by some equipment or valve, be integrated in the framed structure of a similar container, make so originally to have transferred to workshop in the workload in building site, chemical plant, greatly accelerate the construction process in chemical plant, and also ensured product quality in workshop making skid.
Skid needs outdoor use out of doors, also may receive wind load except self is affected by gravity, snow load, and seismic (seismal, and the calculating of skid seem more complicated and trouble, computation period is long, and personnel qualifications is higher.Present invention is directed to a kind of computing method of skid structure invention, use the method, can evaluate more fast skid structural mechanical property and operating mode.Skid structure generally highly all (has detachable two layers of situation) in 5m, and length is no more than 12.5m, and width is no more than 3.5m, and floor area is smaller, and integrated degree is higher, can meet now the demand of factory construction fast.
Summary of the invention
For above-mentioned prior art, the invention provides the check method of a kind of skid chemical plant framed structure, both can calculate scrupulously various applying working conditions comprehensively, can obtain quickly and easily again the result needing.
In order to solve the problems of the technologies described above, the technical scheme that the check method of skid of the present invention chemical plant framed structure is achieved comprises the following steps:
The first step, obtain tested skid frame model, described skid frame model comprises the framework being made up of crossbeam and vertical beam and is used for the supporting surface of load bearing equipment, set up a coordinate system according to described skid frame model, establishing surface level is XOY plane, and described vertical beam direction is Z direction;
Second step, obtain after the weight of all devices on tested skid framework, the particle of each equipment is simplified to center of gravity, utilize SOLIDWORKS software that particle is loaded on described supporting surface, then described skid frame model is reduced to finite element model;
The 3rd step, under different operating modes, carry out the static analysis of skid frame model, comprise
1) stress and the deflection under the most severe situation of working condition;
Determine the most severe force-bearing situation of working condition: be subject to gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe and skid framework to be subject to gravity G, directions X wind load Fxw, snow load Fs and two kinds of stressing conditions of directions X seismic (seismal Fxe to carry out static analysis to skid framework, reduced stress and deflection, determine the most severe situation, one of computation model of checking as skid framework.
2) stress under the hydraulic testing and deflection;
3) be 0.5m/s at lifting acceleration
2under stress and deflection;
If the stress in the 4th step step 3 under various operating modes is in allowable stress range, and crossbeam maximum defluxion is no more than 1/300 of crossbeam length, framed structure meets designing requirement, otherwise need to revise skid frame model, until meet designing requirement.
The invention has the beneficial effects as follows: the various operating modes that make to take into full account in framed structure computation process appearance by these computing method, the situation of the framed structure of calculating by the method under various operating modes, and optimize skid framed structure, ensure the intensity of framed structure, the method is simple, easy-to-use, reliable, can provide good reference for engineering staff.
Brief description of the drawings
Fig. 1 is skid of the present invention chemical plant patent process flow diagram;
Fig. 2 is the overall diagram of 300# in the embodiment of the present invention 1;
Fig. 3 is the frame diagram of 300# in the embodiment of the present invention 1;
Fig. 4 is the schematic diagram that in the embodiment of the present invention 1, static load loads;
Fig. 5 is the wire frame intention that in the embodiment of the present invention, static load loads;
Fig. 6 is the stress diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that the embodiment of the present invention 1 static load is analyzed;
Fig. 7 is the displacement diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that the embodiment of the present invention 1 static load is analyzed;
Fig. 8 is the stress diagram (static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye) that the embodiment of the present invention 1 static load is analyzed;
Fig. 9 is the displacement diagram (static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye) that the embodiment of the present invention 1 static load is analyzed;
Figure 10 is the brace rod that the embodiment of the present invention 1 adds between vertical beam and crossbeam;
Figure 11 is the stress diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that after the embodiment of the present invention 1 is optimized, static load is analyzed;
Figure 12 is the displacement diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that after the embodiment of the present invention 1 is optimized, static load is analyzed;
Figure 13 is the displacement diagram of the embodiment of the present invention 1 hydraulic testing performance analysis;
Figure 14 is the displacement diagram that the embodiment of the present invention 1 lifts performance analysis;
Figure 15 is the stress diagram that the embodiment of the present invention 1 lifts performance analysis;
Figure 16 is the displacement stress diagram that the embodiment of the present invention 1 lifts performance analysis;
Figure 17 is the overall diagram of 200# in the embodiment of the present invention 2;
Figure 18 is the schematic diagram that in the embodiment of the present invention 2, static load loads;
Figure 19 is the stress diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that the embodiment of the present invention 2 static loads are analyzed;
Figure 20 is the displacement diagram (static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe) that the embodiment of the present invention 2 static loads are analyzed;
Figure 21 is the stress diagram (static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye) that the embodiment of the present invention 2 static loads are analyzed;
Figure 22 is the displacement diagram (static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye) that the embodiment of the present invention 2 static loads are analyzed;
Embodiment
As shown in Figure 1, the check method of a kind of skid of the present invention chemical plant framed structure, comprises the following steps:
The first step, obtain tested skid frame model, described skid frame model comprises the framework being made up of crossbeam 13 and vertical beam 14 and the supporting surface 15 that is used for load bearing equipment, set up a coordinate system according to described skid frame model, establishing surface level is XOY plane, and described vertical beam direction is Z direction;
Second step, obtain after the weight of all devices on tested skid framework, as shown in Figure 2, the particle of each equipment is simplified to center of gravity, as shown in Figure 3; Utilize SOLIDWORKS software that particle is loaded into respectively on corresponding supporting surface 15, then described skid frame model is reduced to finite element model, as shown in Figure 4;
The 3rd step, under different operating modes, carry out the static analysis of skid frame model, comprise
1) stress and the deflection under the most severe situation of working condition;
Determine the most severe force-bearing situation of working condition: be subject to gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe and skid framework to be subject to gravity G, directions X wind load Fxw, snow load Fs and two kinds of stressing conditions of directions X seismic (seismal Fxe to carry out static analysis to skid framework, reduced stress and deflection, determine the most severe situation, one of computation model of checking as skid framework.
2) stress under the hydraulic testing and deflection;
3) be 0.5m/s at lifting acceleration
2under stress and deflection;
If the stress in the 4th step step 3 under various operating modes is in allowable stress range, and crossbeam maximum defluxion is no more than 1/300 of crossbeam length, framed structure meets designing requirement, otherwise need to revise skid frame model, until meet designing requirement.
Below taking in order to 2 framed structures as example, the check method of skid of the present invention chemical plant framed structure is described in further detail.
Embodiment 1:
The present embodiment 1 skid chemical plant facility (300#) as shown in Figure 2, this equipment is mainly by skid chemical plant framework 1, pipeline 2, valve 3, regenerator electric heater 4, unstripped gas entrance divides flow container 5, inlet filter 6, little molecule sub-sieve tower 7, molecular sieve tower 8, molecular sieve secondary tower 9, demercuration tower 10, demercuration tank outlet dust filter unit 11, demercuration tank outlet dust filter unit 12 for subsequent use forms, wherein the gross mass of pipeline 2 and valve 3 is 2240KG, the quality of regenerator electric heater 4 is 100KG, it is 260KG that unstripped gas entrance divides the quality of flow container 5, the quality of inlet filter 6 is 620KG, the quality of little molecule sub-sieve tower 7 is 750KG, 8 molecular sieve towers, the quality of molecular sieve secondary tower 9 and demercuration tower 10 is 1800KG respectively, the quality of demercuration tank outlet dust filter unit 11 and demercuration tank for subsequent use outlet dust filter unit 12 is 310KG respectively.Fig. 3 is the framed structure sketch of skid chemical plant facility in Fig. 2, in Fig. 3, the supporting surface, 14 of what Reference numeral 13 referred to the is upper equipment of framework (this framework adopts plain carbon steel) is one of them hole for hoist, 15 is the main brace summer of a foundation end, 16 is a vertical beam, and 17 is the main brace summer in bottom of mounted valve and pipeline, and 18 is the main brace summer of a roots and tops, 19 is the distolateral beam of a foundation, and 20 for being a roots and tops curb girder.Each equipment is assumed to be to particle, and the position of barycenter and the center of gravity of equipment overlap, and then, are carried on the supporting surface of framework, as Fig. 2, Fig. 3 and Fig. 4.
The geography information in the use region, skid chemical plant relating in embodiment 1 is as shown in Table 1 and Table 2:
Table 1. geography information-1
Table 2. geography information-2
| Title | Data |
| Extreme Maximum Temperature (DEG C) | 41.4 |
| The extreme lowest temperature (DEG C) | -25.5 |
| Evaporation capacity (mm) | 2217.7 |
| Maximum depth of frozen ground (cm) | 91 |
| Ground-water level (cm) | 870～1050 |
| Maximum wind velocity (m/s) | 23 |
| Seismic fortification intensity | 7 degree (0.15g) |
| Place sea level elevation (m) | 750 |
Utilize the check method of skid of the present invention chemical plant framed structure that embodiment 1 is checked and comprised the following steps:
Obtain tested skid frame model, described skid frame model comprises the framework being made up of crossbeam 13 and vertical beam 14 and the supporting surface 15 that is used for load bearing equipment, set up a coordinate system according to described skid frame model, establishing surface level is XOY plane, and described vertical beam direction is Z direction;
Obtain all devices on tested skid framework, as shown in Figure 2, comprise skid chemical plant framework 1, pipeline 2, valve 3, regenerator electric heater 4, unstripped gas entrance divides flow container 5, inlet filter 6, little molecule sub-sieve tower 7, molecular sieve tower 8, molecular sieve secondary tower 9, demercuration tower 10, after the weight of demercuration tank outlet dust filter unit 11 and demercuration tank for subsequent use outlet dust filter unit 12, the particle of each equipment is simplified to center of gravity, as shown in Figure 3, utilize SOLIDWORKS software that particle is loaded into respectively on corresponding supporting surface 15, then described skid frame model is reduced to finite element model, shown in Fig. 4,
Under different operating modes, carry out the static analysis of skid frame model, comprising:
(1), according to the geography information in this use region, skid chemical plant, carry out the static analysis of skid frame model for following two kinds of force status, thereby draw stress and the deflection of bad working environments;
1-1) the static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe; Maximum stress 301.5Mpa, as Fig. 6; Maximum deformation quantity is 29.46mm, is greater than vertical beam length 1/300, as Fig. 7;
1-2) the static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye; Maximum stress 28Mpa, as Fig. 8; Maximum deformation quantity is 2.14mm, is less than 1/300 of vertical beam length, as Fig. 9.
Through data comparisons, draw above-mentioned 1-1) in operating mode be bad working environments, maximum stress reaches 301.5MPa, because the permissible stress of plain carbon steel is 155Mpa, therefore, the maximum stress of the skid framework of the present embodiment 1 has exceeded permissible stress, and local stress is excessive; The maximum deformation quantity of skid cruciform bracing 13 reaches 29.4mm, reaches 29mm for the deflection of the maximum distortion (vertical beam) of single beam, and deflection is greater than 2500(vertical beam length) * 1/300.The stress under this operating mode has exceeded the scope of permissible stress, and crossbeam maximum defluxion has exceeded the 1/300(29 > 2500(vertical beam length of crossbeam length) * 1/300), framed structure does not meet designing requirement, need to revise skid frame model until meet designing requirement, the present embodiment 1 by increasing supporting construction adjustment on framework, as shown in figure 10, repeat above-mentioned 1-1) and 1-2) exchange perfect square case and analyze, thereby the maximum stress that draws adjustment scheme is 141Mpa(is less than permissible stress), as Figure 11; Maximum deformation quantity is 9.43mm, is less than 1/300 of vertical beam length, as Figure 12.
(2) stress under the hydraulic testing and deflection; Maximum stress is 26.5MPa, as Figure 13; Maximum displacement is 1.251mm, as Figure 14;
(3) be 0.5m/s at lifting acceleration
2under stress and deflection; Maximum stress is 27MPa, as Figure 15; Maximum displacement is 1.262mm, as Figure 16.
In above-mentioned (1), (2) and 6.4 and 5, stress, deflection all satisfy the demands.That is: the stress under various operating modes is in allowable stress range, and crossbeam maximum defluxion is no more than 1/300 of crossbeam length, and framed structure meets designing requirement.
Embodiment 2 implements according to process flow diagram 1
As shown in figure 17, the equipment on embodiment 2 skid chemical plant frameworks (200#) comprises:
Dehydration tower T-202, its weight 900KG; Except flow container V-202, its weight 600KG; Filter F-203, its weight 850KG; Filter F-202, its weight 1000KG; Plate type heat exchanger E-201 weight 600KG, pipeline+valve weight 2040KG, and the center of gravity of equipment is assumed to be a bit, and be carried on the supporting surface that framework bears equipment;
As shown in figure 18, obtain after tested skid frame model, set up a coordinate system according to frame model, that is: ground is XOZ plane, and vertical beam direction is Y-direction.
The geography information in the use region, skid chemical plant relating in embodiment 2 as shown in Table 1 and Table 2.
Under different operating modes, carry out the static analysis of skid frame model, comprise
Carry out the static analysis of skid frame model for following two kinds of force status, thereby draw stress and the deflection of bad working environments; Comprise:
1) static analysis of skid framework under gravity G, directions X wind load Fxw, snow load Fs and directions X seismic (seismal Fxe; Maximum stress 134MPa.As Figure 19.Maximum deformation quantity is 9.35mm, is less than vertical beam length 1/300, as Figure 20.
2) static analysis of skid framework under gravity G, Y-direction wind load Fyw, snow load Fs and Y-direction seismic (seismal Fye; Maximum stress 21.8MPa.As Figure 21.Maximum deformation quantity is 1.734mm, is less than vertical beam length 1/300, as Figure 22.
3) stress under the hydraulic testing and deflection: maximum stress is 15.2Mpa, maximum displacement is 0.05mm.
4), under lifting situation: maximum stress is 26.5Mpa, maximum displacement is 1.262mm.
Stress and deflection under above-mentioned different operating mode all satisfy the demands.This framed structure meets design requirement.
Although in conjunction with figure, invention has been described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present invention; in the situation that not departing from aim of the present invention, can also make a lot of distortion, within these all belong to protection of the present invention.
Claims (1)
1. a check method for skid chemical plant framed structure, comprises the following steps:
The first step, obtain tested skid frame model, described skid frame model comprises the framework being made up of crossbeam and vertical beam and is used for the supporting surface of load bearing equipment, set up a coordinate system according to described skid frame model, establishing surface level is XOY plane, and described vertical beam direction is Z direction;
Second step, obtain after the weight of all devices on tested skid framework, the particle of each equipment is simplified to center of gravity, utilize SOLIDWORKS software that particle is loaded on described supporting surface, then described skid frame model is reduced to finite element model;
The 3rd step, under different operating modes, carry out the static analysis of skid frame model, comprise
1) stress and the deflection under the most severe situation of working condition;
Determine the most severe force-bearing situation of working condition: skid framework is subject to gravity G, directions X wind load F
xw, snow load F
swith directions X seismic (seismal F
xebe subject to gravity G, directions X wind load F with skid framework
xw, snow load F
swith directions X seismic (seismal F
xetwo kinds of stressing conditions carry out static analysis, and reduced stress and deflection are determined the most severe situation, one of computation model of checking as skid framework;
2) stress under the hydraulic testing and deflection;
3) be 0.5m/s at lifting acceleration
2under stress and deflection;
If the stress in the 4th step step 3 under various operating modes is in allowable stress range, and crossbeam maximum defluxion is no more than 1/300 of crossbeam length, framed structure meets designing requirement, otherwise need to revise skid frame model, until meet designing requirement.
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Cited By (1)
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| CN105320069A (en) * | 2015-09-29 | 2016-02-10 | 北京首钢国际工程技术有限公司 | Control method for designing and manufacturing dry-type gas tank |
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| CN105320069A (en) * | 2015-09-29 | 2016-02-10 | 北京首钢国际工程技术有限公司 | Control method for designing and manufacturing dry-type gas tank |
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Address after: Rong Yuan Road 300384 Tianjin city Nankai District Huayuan Industrial Park Hotel Room 507 No. 1 day Applicant after: TIANJIN ZENITH OIL&GAS ENGINEERING CO., LTD. Address before: 300384 Tianjin City, Rong Yuan Road Binhai Huayuan Industrial Park No. 1 day hotel room 507 Applicant before: Zenith Engineering Co., Ltd. |
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Address after: Fuyilu plastic products industrial zone Tianjin city Baodi County No. 2 301800 Applicant after: TIANJIN ZENITH OIL&GAS ENGINEERING CO., LTD. Address before: Rong Yuan Road 300384 Tianjin city Nankai District Huayuan Industrial Park Hotel Room 507 No. 1 day Applicant before: TIANJIN ZENITH OIL&GAS ENGINEERING CO., LTD. |
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