CN115329447B - Dust remover structure safety assessment method - Google Patents
Dust remover structure safety assessment method Download PDFInfo
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- CN115329447B CN115329447B CN202211251287.6A CN202211251287A CN115329447B CN 115329447 B CN115329447 B CN 115329447B CN 202211251287 A CN202211251287 A CN 202211251287A CN 115329447 B CN115329447 B CN 115329447B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention provides a method for evaluating the safety of a dust remover structure. The method comprises the following steps: s1: acquiring parameters; s2: checking calculation of structural modeling; s3: a component safety rating; s4: structural system and support system security ratings; s5: and (5) grading the overall safety of the dust remover. The invention firstly detects and checks the dust remover respectively, secondly carries out safety rating on components in each system, thirdly carries out safety evaluation on a shell system, a support system, a foundation basic system and a support system which are formed by the components, and finally carries out the safety evaluation on the whole safety of the dust remover, and the evaluation result can reflect the safety condition of each system and the comprehensive safety condition of the whole dust remover.
Description
Technical Field
The invention relates to the field of engineering structure detection and identification, in particular to a dust remover structure safety assessment method.
Background
Coal is in an absolute position in a disposable energy structure in China, and according to relevant research of Chinese academy of sciences, the coal accounts for not less than 50% of energy until 2050. The dust remover is used as equipment for purifying flue gas and collecting dust after combustion of solid substances such as coal and the like, and is widely applied to industries such as electric power, cement, metallurgy, nonferrous metals, grain, garbage incineration and the like.
In recent years, dust collectors built in 90 years in China enter the design service life end successively, in the use process of 30 years, along with the upgrading of dust removal technology, part of the dust collectors are simply disassembled, changed and upgraded on the basis of original dust collector shells, in addition, the dust collectors are usually applied to a production line as complete equipment products and are not designed as civil structures, the design, manufacture and installation execution standards of the dust collectors are mostly dust collector product standards, the safety degree is not matched with the civil structures, and the safety hazards bring huge potential hazards to the overall safety of the dust collectors, for example, safety accidents of casualties caused by the collapse of the dust collector structures or the falling of ash buckets of a plant power plant such as 9.22% of a Tanshou power plant, 2.6% of Maanshan steel, 2.15% of a high-bridge power plant outside Shanghai and the like occur successively in the near term.
Due to professional crossability existing during safety assessment of the dust remover structural shell and the support, a safety assessment method which is strong in pertinence, reliable and practical is lacked at present, and objective and accurate assessment of the safety condition of the dust remover is achieved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a dust remover structure safety assessment method which comprises the steps of obtaining parameters of all components aiming at a dust remover structure, providing a method for carrying out integral modeling checking calculation on the dust remover structure by adopting an integral finite element model, and carrying out safety rating. The invention can accurately master the safety condition of the dust remover and provide technical basis for the subsequent maintenance and treatment of the dust remover.
The invention is realized by the following steps: a dust remover structure safety assessment method comprises a shell system, a bracket system, a foundation base system and a support system, wherein the shell system comprises a box body, an ash hopper and a gas purification chamber; the box body comprises a plurality of box body stand columns; the support system comprises a plurality of support posts; the support system comprises a guide support and a free support; the shell system is arranged on the support system through the support system, the support system is arranged on the foundation system, the shell system, the support system and the foundation system form a structural system, and the method comprises the following steps:
s1, parameter acquisition: the following detection parameters of the dust remover are obtained:
(1) a force transmission path: a force transfer path between the housing system and the bracket system;
(2) deformation of the member: deformation values of the housing system and the bracket system;
(3) connection quality: the welding quality and the bolt connection quality of the components of the shell system and the bracket system;
(4) the support column is inclined: the inclination direction and the inclination value of the support column;
(5) the whole body of the shell inclines: the inclination direction and the inclination value of the box body;
(6) corrosion of steel: rust corrosion of steel of the housing system and the bracket system;
(7) the support is eccentric: relative deviation of box body upright post and bracket post central line at support
；
(8) Support slidability: the sliding performance of the friction surfaces of the guide support and the free support;
(9) elevation and level of the bottom of the support: the difference of the height of the bottom of each support and the levelness of the bottom surface of each support;
and (3) limit measures of an R support: whether the guide support and the free support are provided with limiting measures for preventing the box body stand column from sliding off the top of the support column or not;
⑪ base settlement: the base settlement value of the support column.
S2, structural modeling checking calculation: and establishing an integral finite element model of the dust remover, including a shell system and a bracket system, and checking the bearing capacity of components in each system, wherein the checking includes the checking of the local pressure bearing capacity of the support.
Step S3, 1) component security rating: obtaining the ratio of resistance to load effect according to the detection result of the step S1 and the checking calculation result of the step S2, carrying out safety rating on each component of the shell system, the support system and the foundation base system according to relevant regulations of 'industrial building reliability identification standard' GB50144, and calculating the proportion of the quantity of each level of components in the system, wherein the safety rating is that each component is rated as a, b, c or d, a is optimal, and d is worst; wherein the content of the first and second substances,
(1) Shell system component rating
When the components of the shell system are graded, the parameters of the steps S1 (2), (3), (5) and (6) and the checking calculation result of the step S2 are taken, and the component grading is carried out according to the Industrial building reliability identification Standard GB 50144;
(2) Rack system component rating
When the components of the bracket system are graded, taking the parameters of the steps S1 (2) (3) (4) (6) and the checking result of the step S2, and grading the components according to the Industrial building reliability identification Standard GB 50144;
(3) Foundation system component rating
When the foundation system is graded, taking the parameters of the step S1 ⑪ and the checking result of the step S2, and grading the components according to the Industrial building reliability identification Standard GB 50144;
2) Single item control rating: and for the dust remover meeting any one of the following single control rating indexes, the overall safety of the dust remover is rated as D, and the single control rating index is as follows:
(1) the side length of the section of the bracket column is more than 1/3 of the side length of the section of the outward eccentric bracket column relative to the upright column of the box body or any bracket column loses the supporting function;
(2) the column head of the support column is pressed locally and seriously deformed;
(3) the height difference between the adjacent elevations of the tops of the support columns is more than or equal to 20mm;
(4) the integral inclination of the box body is more than or equal to 3/1000.
S4, evaluating a structural system and a support system: on the basis of the safety rating of the members in the step S3, rating the shell system, the support system and the foundation base system according to the proportion of the number of the members at each level in the system and the industrial building reliability identification standard GB50144, and rating each system as A, B, C or D level, wherein A is optimal and D is worst;
when the shell system is graded, according to the proportion of the component safety grading results a, b, c and d in the step S3 in the shell system, grading the three parts of the box body, the ash bucket and the air purifying chamber according to industrial building reliability identification standard GB50144, respectively, grading each part as A, B, C, D, and taking the worst grade of the three parts as the grading result of the shell system according to industrial building reliability identification standard GB 50144;
when the support system is graded, grading the support system according to the industrial building reliability identification standard GB50144 according to the proportion of the component safety grading results a, b, c and d in the support system in the step S3;
when the foundation base system is graded, the proportion of the component safety grading results a, b, c and d in the step S3 in the foundation base system is taken, and the foundation base system is graded according to the Industrial building reliability evaluation Standard GB 50144;
when the support system is graded, the parameters in the R parts in the steps S1 (7) (8) (9) and the checking calculation result of the local pressure bearing capacity of the support in the step S2 are taken, and the grading result of the support system is given according to the industrial building reliability identification standard GB 50144.
Step S5, overall evaluation: and (4) giving an integral safety rating result of the dust remover, A, B, C or grade D according to a single control rating result in the steps S4 and S3 and an industrial building reliability identification standard GB 50144.
In some embodiments, the step S2 further includes, when building the whole finite element model, ensuring that the force transfer, the rigidity distribution and the mass distribution between the shell system and the bracket system are consistent with the actual structure, and modifying the whole finite element model according to the parameters of the steps S1 (2) (4) (5) (9).
In some embodiments, in the step S2, when the box body upright is externally attached, a local finite element model is established to calculate the pressure eccentricity of the box body upright on the bracket column
According to the relative deviation
And eccentricity of pressure
To obtain the eccentricity of the upright column of the box body to the support column
(ii) a Wherein when
When the eccentric direction is the same, then
When is coming into contact with
When the eccentric direction is opposite, then
Off-center direction of rotation
The direction in which the absolute value is larger; according to the eccentricity
Correcting the integral finite element model in the step S2, and checking the component bearing capacity of the shell system and the support system; extracting the column bottom counter force of the support column of the support system to check the bearing capacity of the foundation system; when the local pressure structure at the support is unreasonable, a local finite element model is established to check the local pressure bearing capacity at the bottom of the support, and the check result gives the ratio of the resistance to the load effect.
In some embodiments, in said step S4 of rating the seat system, the following item rating criteria are evaluated:
the standard of the eccentricity rating of the support is as follows:
if it is
If yes, the step is a;
if it is
If yes, the step is b;
if it is
If yes, the value is c grade;
if it is
If so, the value is d grade;
wherein the content of the first and second substances,
the length or diameter of the side of the support in the eccentric direction.
In some embodiments, upon said step S4 of rating the seat system, the following item rating criteria are further evaluated:
the grade standard of the sliding property of the support is as follows:
if the viscosity of the lubricating grease is normal and the friction surface is flat and has no corrosion, the lubricating grease is a grade a;
if the lubricating grease is solidified and the friction surface is slightly rusted, the grade b is determined;
if the jamming occurs, the grade is c.
In some embodiments, upon said step S4 of ranking the seat system, the following item rating criteria are further evaluated:
the rating standard of the support limiting measure is as follows:
if an effective limiting measure is set, the level is a;
if no limit measure is set, the level is c.
In some embodiments, in the step S4 of rating the seat system, the seat system rating criteria are:
the grade A is evaluated as grade A, wherein the grade C and grade D supports are not contained, the grade B supports are contained, and the grade B supports are less than or equal to 30 percent of the total number of the supports;
the grade B is evaluated as grade B, wherein the grade D support is not contained, the grade C support is contained, and the grade C support is less than or equal to 20 percent of the total number of the supports;
1 d-grade support exists in the non-peripheral support and is rated as C grade;
and D-grade supports exist in the peripheral supports and are rated as D-grade supports.
In some embodiments, the step S5 includes taking the lower level of the rating results of the housing system, the support system, the foundation system and the support system and the single control rating as the overall safety level of the dust remover, and the order of the levels from high to low is A, B, C, D.
The invention has the beneficial effects that: the dust remover is divided into a structure system and a support system, the shell system, the support system, the foundation base system and the support system are respectively subjected to safety evaluation, and then the overall safety evaluation is carried out on the basis. The evaluation result can reflect the safety conditions of the structural system and the support system, wherein the shell system can reflect the safety condition of equipment, the support system and the foundation system can reflect the civil engineering safety condition, the support system can reflect the connection safety condition of the support system and the shell system, and the evaluation result reflects the comprehensive safety condition of the dust remover. The invention provides a set of objective and accurate assessment method for the safety assessment of civil engineering cross structures of equipment such as coal mine dust collectors and the like.
Drawings
FIG. 1 is a side view of a precipitator in accordance with embodiments of the present invention;
FIG. 2 is an inlet view of a precipitator in accordance with embodiments of the present invention;
FIG. 3 is a schematic view of a duster housing member according to an embodiment of the present invention;
FIG. 4 is a plan view of an ash hopper arrangement of a dust collector according to an embodiment of the present invention;
FIG. 5 is a schematic view of a precipitator ash bucket component according to embodiments of the present invention;
FIG. 6 is a schematic view of the components of a duster support system according to embodiments of the present invention;
FIG. 7 is a schematic view of a holder system component of a dust collector according to an embodiment of the present invention;
FIG. 8 is a flow chart of a method for evaluating the safety of a dust collector structure according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a side view of a dust separator according to an embodiment of the present invention, and fig. 2 is an intake view of the dust separator according to the embodiment of the present invention. As shown in fig. 1 and 2, the dust collector applied in the safety evaluation method of the dust collector of the present invention may be an electric redistribution dust collector, which includes: the device comprises a shell system (1), a support system (2), a foundation base system (3) and a support system (4). The shell system (1) comprises a box body (11), an ash bucket (12) and an air purifying chamber (13). FIG. 3 is a schematic view of a dust collector case member according to an embodiment of the present invention. As shown in fig. 3, in some embodiments, the tank (11) may include a plurality of tank uprights (111), tank cross ribs (112), tank vertical ribs (113), tank inter-upright supports (114), and tank wall panels (115). FIG. 5 is a schematic view of a dust catcher ash bucket component according to an embodiment of the present invention. As shown in fig. 5, the hopper (12) includes a plurality of hopper cross ribs (121), hopper vertical ribs (122), and hopper wall plates (123). FIG. 6 is a schematic view of a bracket system component of a dust collector according to an embodiment of the present invention. As shown in fig. 6, the rack system (2) may include a plurality of rack columns (21) and inter-column braces (22). Fig. 7 is a schematic structural view of a holder system of a dust collector according to an embodiment of the present invention. As shown in fig. 7, the support system (4) includes a plurality of supports (41), and in some embodiments, the supports (41) may include a fixed support (411), a guide support (412), and a free support (413). As shown in fig. 1, the housing system (1) is arranged on the support system (2) by means of the bearing system (4), and the support system (2) is arranged on the foundation system (3). Fig. 8 is a flowchart of a method for evaluating safety of a dust collector structure according to an embodiment of the present invention.
In some embodiments, the box uprights (111) may be i-beams, the box cross rib (112) may be two cross-sectional beams, the box vertical rib (113) may be angle steel, the box inter-post supports (114) may be double angle steel, and the box wall panel (115) may be steel. Fig. 4 is a plan view showing an arrangement of dust hoppers in the dust collector according to the embodiment of the present invention. As shown in fig. 4, in some embodiments, the ash hoppers (12) may be arranged in an inter-axis grid, which may be 12. The ash bucket transverse rib (121) can be a channel steel, the ash bucket vertical rib (122) can be an angle steel, and the ash bucket wall plate (113) can be a steel plate.
In some embodiments, the scaffolding system (2) may be a steel scaffolding structure, wherein both scaffolding columns (21) and inter-column supports (22) employ welded round steel tubes. The section of the support column can be 400 mm multiplied by 10mm, the section of the inclined strut is 200 mm multiplied by 8mm, and the section of the cross strut is 156 mm multiplied by 8mm. The foundation footing system (3) can be 12 independent extended foundations.
In some embodiments, the housing system (1) of the precipitator can rest on the lower bracket system (2) through 20 supports (41), as shown in fig. 7, the top of the bracket column (21) at the intersection of the C axis and the (2) axis is a fixed support (411), the rest of the supports (41) on the C axis and the (2) axis are guide supports (412), and the rest of the intersections are free supports (413). In some embodiments, the box body upright column (111) is externally attached to the box body wall plate (115), the bottom of the box body upright column (111) is arranged at the top of the support column (21) through the support (41), and the box body upright column (111) and the support column (21) are not eccentric in design.
The embodiment provides a method for evaluating the structural safety of a dust remover, as shown in fig. 8, comprising the following steps:
s1, parameter acquisition: the following detection parameters of the dust remover are obtained:
(1) a force transmission path: a force transmission path between the housing system (1) and the bracket system (2);
(2) deformation of the member: the deformation values of the housing system (1) and the support system (2);
(3) connection quality: the welding quality and the bolt connection quality of the components of the shell system (1) and the bracket system (2);
(4) the support column is inclined: the inclination direction and the inclination value of the support column (21);
(5) the whole body of the shell inclines: the inclination direction and the inclination value of the box body (11);
(6) corrosion of steel: the corrosion condition of the steel of the shell system (1) and the bracket system (2);
(7) the support is eccentric: relative deviation between a box body upright post (111) at the support (41) and the central line of a support post (21)
；
(8) Support slidability: the sliding performance of the friction surfaces of the guide support (412) and the free support (413);
(9) elevation and level of the bottom of the support: the difference of the bottom elevation of each support (41) and the levelness of the bottom surface of each support (41);
and (3) limit measures of an R support: whether the guide support (412) and the free support (413) are provided with a limiting measure for preventing the box body upright post (111) from sliding off from the top of the support post (21) or not;
⑪ base settlement: the base settlement value of the bracket column (21).
S2, structural modeling checking calculation: establishing an integral finite element model of the dust remover, including a shell system (1) and a bracket system (2), and checking the bearing capacity of components in each system, wherein the checking of the partial pressure bearing capacity of a support (41) is included. And when the integral finite element model is established, ensuring that the force transmission action, the rigidity distribution and the mass distribution between the shell system (1) and the bracket system (2) are consistent with the actual structure, and correcting the integral finite element model by taking the parameters of the steps S1 (2), (4), (5) and (9). When the box body upright post (111) is in an externally-attached mode, a local finite element model is established to calculate the pressure eccentricity of the box body upright post (111) to the support post (21)
According to the relative deviation
And eccentricity of pressure
To obtain the eccentricity of the upright column (111) of the box body to the support column (21)
(ii) a Wherein when
When the eccentric direction is the same, then
When is coming into contact with
When the eccentric direction is opposite, then
Off-center direction of rotation
The direction with the larger absolute value; according to the eccentricity
Correcting the integral finite element model in the step S2, and checking and calculating the component bearing capacity of the shell system (1) and the support system (2); extracting the column bottom reaction force of a support column (21) of the support system (2) to check the bearing capacity of the foundation system (3); when the local pressure structure at the support (41) is unreasonable, a local finite element model is established to check the bottom local pressure bearing capacity of the support (41), and the check result gives the ratio of the resistance to the load effect.
S3, grading the safety of the component; and giving a ratio of resistance to a load effect according to the detection result of the step S1 and the checking and calculating result of the step S2, carrying out safety rating on each component of the shell system, the support system and the foundation base system according to relevant regulations of Industrial building reliability identification Standard GB50144, and calculating the proportion of the quantity of the components of each level in the system, wherein the safety rating is that each component is rated as a, b, c and d, a is optimal, and d is worst.
And for the dust remover meeting any one of the following single control rating indexes, the overall safety of the dust remover is rated as D, and the single control rating index is as follows:
(1) the outward eccentricity of the support column (21) relative to the box body upright column (111) is more than 1/3 of the side length of the section of the support column (21), or any support column (21) loses the supporting function;
(2) the head of the support column (21) is pressed locally and seriously deformed;
(3) the height of the top of the support column (21) is Gao Cha mm adjacent to each other;
(4) the integral inclination of the box body (11) is more than or equal to 3/1000.
The present embodiment combines the results of on-site inspection and structural modeling checking analysis:
(1) Shell system component rating
When the components of the housing system (1) are graded, the parameters of the steps S1 (2) (3) (5) (6) and the checking result of the step S2 are taken, and the component grading is carried out according to the standard.
In some embodiments, the tank (11): and (3) analyzing the result by combining the parameters obtained in the step (S1) and the structural modeling checking calculation in the step (S2): when the ratio of the resistance to the load effect of the components such as the box upright column (111) is more than 1, the component safety is rated as a grade according to the Standard; the splicing welding seam at the position of 3.000m of the height of the box body upright post (111) is not welded completely, the connection quality problem exists in the step (3), and the safety level of 1 box body upright post (111) is rated as level c, and accounts for 5%; the safety level of other components of the box body (11) is rated as b level; the integral inclination rate of the box body (11) is 2.2 per mill.
Ash bucket (12): and (3) analyzing the result by combining the parameters obtained in the step (S1) and the structural modeling checking calculation in the step (S2): in some embodiments, if the ratio of the resistance to the load effect of the transverse stiffeners (121) of the ash hopper (12), the vertical stiffeners (122) of the ash hopper, and the wall plate (123) of the ash hopper is greater than 1, all component safety levels are rated as a level according to the standard, and one transverse stiffener (121) has a cold joint at the corner joint according to field inspection, accounting for 12%, and rated as b.
Air-purifying chamber (13): and (3) analyzing the result by combining the parameters obtained in the step (S1) and the structural modeling checking calculation in the step (S2): in some embodiments, if the load capacity of the air-purifying chamber (13) meets the requirement, no obvious damage and defects exist, and the safety level of all components of the air-purifying chamber (13) is rated as a level.
(2) Rack system component rating
When the components of the bracket system (2) are graded, the parameters of the steps S1 (2) (3) (4) (6) and the checking result of the step S2 are taken, and the component grading is carried out according to the standard.
In some embodiments, if the bearing capacity of the support columns (21) and the inter-column supports (22) of the support system (2) meet the requirement of 'standard', the support columns (21) meet the requirement of 'standard', the defect damage does not affect the safety of the components, and the safety grade of each component is rated as 'b'; if the top of each support column (21) lacks transverse connection and the structural system is incomplete, the structural system integrity is rated as C grade.
(3) Foundation base system component rating
And (3) when the foundation base system (3) is graded, taking the parameters of the step S1 ⑪ and the checking calculation result of the step S2, and grading the components according to the standard.
In some embodiments, if the foundation of the dust collector is used for about 18 years, the current situation of the foundation is stable, the bearing capacity check calculation meets the requirement, and the safety level of each foundation is rated as a level.
S4, evaluating a structural system and a support system: on the basis of the grading of the components in the step S3, grading the shell system (1), the support system (2) and the foundation base system (3) according to the standard according to the proportion of each level of components, namely, grading each system as A, B, C, D level, wherein A is optimal and D is worst;
when the shell system (1) is graded, the proportion of the number of the components of the levels a, b, c and d in the shell system (1) is given according to the component safety grading result in the S3, the box body (11), the ash hopper (12) and the air purifying chamber (13) are graded according to the standard, namely, each part is graded as A, B, C, D, and the worst grade of the three parts is taken as the grading result of the shell system (1) according to the standard.
In some embodiments, the shell system (1) is rated as:
the content of a c-grade component in the box body (11) is not more than 20 percent, no component with the safety of d-grade is contained, the integral inclination of the shell is 2.2 per mill, and the grade is evaluated as B grade; the ash bucket (12) does not contain a c-grade component, contains a b-grade component and is not more than 20 percent and is rated as A grade; the air purifying chamber (13) has no obvious defects and is rated as A grade; therefore, the rating of the shell system (1) is the worst rating of the box body (11), the ash hopper (12) and the air purifying chamber (13), namely, the shell system (1) is rated as B grade.
In some embodiments, the rack system (2) is rated as:
and when the support system (2) is graded, the proportion of the safety grading results of the components a, b, c and d in the step S3 in the support system (2) is taken, and the support system (2) is graded according to the standard.
In some embodiments, if the precipitator support system (2) does not contain C and d stage members, the content of b stage members is more than 30%, and the support system (2) is rated as C stage.
In this embodiment, the rating of the ground based system (3) is:
and when the foundation base system (3) is graded, grading the foundation base system according to the standard according to the proportion of the component safety grading results a, b, c and d of the step S3 in the foundation base system (3).
In some embodiments, if the foundation system (3) of the dust collector is used for about 18 years, the current situation of the foundation system (3) is stable, the bearing capacity is verified to meet the requirement, the differential settlement does not occur, and therefore the safety rating of the foundation system (3) is A.
When the support system (4) is graded, the parameters in steps S1 (7) (8) (9) and the checking result of the partial pressure bearing capacity of the support (41) in step S2 are taken, and the grading result of the support system (4) is given according to the standard. In some embodiments, when the seat system (4) is rated, the following item rating criteria are evaluated:
the standard of the eccentricity rating of the support is as follows:
if it is
If yes, the step is a;
if it is
If yes, the step is b;
if it is
If so, the value is in the c level;
if it is
If so, the value is d grade;
wherein the content of the first and second substances,
the length or the diameter of the side in the eccentric direction of the support;
the rating standard of the sliding property of the support is as follows:
if the viscosity of the lubricating grease is normal and the friction surface is flat and has no corrosion, the lubricating grease is a grade a;
if the lubricating grease is solidified and the friction surface is slightly rusted, the lubricating grease is grade b;
if the jamming occurs, the grade is c;
the rating standard of the support limiting measure is as follows:
if an effective limiting measure is set, the level is a;
if no limit measure is set, the level is c.
In some embodiments, when the seat system (4) is rated, the seat system (4) rating criteria is:
the grade A is evaluated as grade A without the grade c and grade d supports (41), and the grade b support (41) is contained, and the grade b support (41) is less than or equal to 30 percent of the total number of the supports (41);
the grade B is evaluated as grade B, wherein the grade D support (41) is not included, the grade c support (41) is included, and the grade c support (41) is less than or equal to 20 percent of the total number of the supports (41);
1 d-grade support exists in the non-peripheral support (41) and is rated as C-grade;
a D-grade support is arranged in the peripheral support (41) and is rated as D grade.
In this embodiment, the rating result of the support system (4) is:
and (3) analyzing the result by combining the parameters obtained in the step (S1) and the structural modeling checking calculation in the step (S2): in some embodiments, in step S2, no significant geometric eccentricity of the support (41) is detected, and it is calculated that the maximum value of the eccentricity of the axial force of the box upright (111) is 32mm,
=0.08, all stand eccentricities are rated in class a; the friction surfaces of the support (41) are slightly rusted and rated as b and b; the height difference and the inclination of the adjacent supports (41) are introduced into an integral finite element model for calculation, and the result shows that in the embodiment, the local pressure bearing capacity of 5 supports (41) is rated as b grade because the ratio of the local pressure resistance to the effect of 5 support column heads is 0.96 and the rest is more than 1; as only the fixed support (411) has limiting measures in all directions, the rest of the supports (41) are not provided with limiting measures and are rated as class C, the number accounts for 95.00 percent, and therefore, the class C components of the support system account for 95 percent, and the support system (4) is rated as class C.
And S5, overall evaluation: and (4) according to the rating result of the single control evaluation result in the steps S4 and S3, and according to the Standard, giving the overall safety rating result of the dust remover, namely A, B, C or D grade. And taking the rating results of the shell system (1), the support system (2), the foundation base system (3) and the support system (4) and the lower grade in the single control rating as the overall safety grade of the dust remover, wherein the grades are A, B, C, D in the order from high to low.
In some embodiments, the structural system comprises a shell system (1), a bracket system (2) and a foundation system (3) which are rated as B level, C level and A level respectively, a single control evaluation condition does not occur, and the rating result of the structural system is the worst level, namely the structural system is rated as C level and the support system (4) is rated as C level.
In some embodiments, the integrated structural and seating systems (4) rate the results and the overall duster is rated class C.
The dust remover is divided into a structure system and a support system, the shell system, the support system, the foundation base system and the support system are respectively subjected to safety evaluation, and then the overall safety evaluation is carried out on the basis. The evaluation result can reflect the safety conditions of the structural system and the support system, wherein the shell system can reflect the safety condition of equipment, the support system and the foundation system can reflect the civil engineering safety condition, the support system can reflect the connection safety condition of the support system and the shell system, and the evaluation result reflects the comprehensive safety condition of the dust remover. The invention provides a set of objective and accurate assessment method for the safety assessment of civil engineering cross structures of equipment such as coal mine dust collectors and the like.
The invention firstly detects and checks the dust remover respectively, secondly carries out safety rating on components in each system, thirdly carries out safety evaluation on a shell system, a support system, a foundation basic system and a support system which are formed by the components, and finally carries out the safety evaluation on the whole safety of the dust remover, and the evaluation result can reflect the safety condition of each system and the comprehensive safety condition of the whole dust remover.
It should be understood that the above-mentioned embodiments are only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention. Those skilled in the art may also practice the invention in other ways without departing from the essential spirit and characteristics of the invention. The scope of the present invention is to be determined by the appended claims, and any modifications, equivalents, improvements, etc. made within the spirit and principles of one or more embodiments of the present disclosure are intended to be covered thereby.
Claims (8)
1. A dust remover structure safety assessment method comprises a shell system (1), a support system (2), a foundation base system (3) and a support system (4), wherein the shell system (1) comprises a box body (11), an ash bucket (12) and an air purifying chamber (13); wherein the box body (11) comprises a plurality of box body upright posts (111); the mounting system (2) comprises a plurality of mounting posts (21); the bearing system (4) comprises a guide bearing (412) and a free bearing (413); the shell system (1) is arranged on the support system (2) by means of a bearing system (4), the support system (2) is arranged on the foundation base system (3), wherein the shell system (1), the support system (2) and the foundation base system (3) form a structural system, characterized in that the method comprises the following steps:
step S1: acquiring parameters: the following detection parameters of the dust remover are obtained:
(1) a force transmission path: a force transmission path between the housing system (1) and the bracket system (2);
(2) deformation of the member: the deformation values of the housing system (1) and the support system (2);
(3) connection quality: the welding quality and the bolt connection quality of the components of the shell system (1) and the bracket system (2);
(4) the support column inclines: the inclination direction and the inclination value of the support column (21);
(5) the whole body of the shell inclines: the inclination direction and the inclination value of the box body (11);
(6) rusting of steel: the corrosion condition of the steel of the shell system (1) and the bracket system (2);
(7) the support is eccentric: relative deviation between a box body upright post (111) at the support (41) and the central line of a support post (21)
；
(8) Support slidability: the sliding performance of the friction surfaces of the guide support (412) and the free support (413);
(9) elevation and level of the bottom of the support: the difference of the bottom elevation of each support (41) and the levelness of the bottom surface of each support (41);
and (3) limit measures of an R support: whether the guide support (412) and the free support (413) are provided with a limiting measure for preventing the box body upright post (111) from sliding off from the top of the support post (21) or not;
⑪ basis settlement: a base settlement value of the support column (21);
step S2: and (3) structural modeling checking calculation: establishing an integral finite element model of the dust remover, including a shell system (1) and a bracket system (2), and checking the bearing capacity of components in each system, wherein the checking calculation of the local pressure bearing capacity of a support (41) is included;
and step S3: 1) Component safety rating: obtaining the ratio of the resistance to the load effect according to the detection result of the step S1 and the check calculation result of the step S2, carrying out safety rating on each component of the shell system, the support system and the foundation base system according to relevant provisions of industrial building reliability identification standard GB50144, and calculating the proportion of the quantity of the components of each level in the system, wherein the safety rating is to rate each component as a, b, c or d level, the a is optimal, and the d is worst; wherein, the first and the second end of the pipe are connected with each other,
(1) Shell system (1) component rating
When the components of the shell system are graded, the parameters of the steps S1 (2) (3) (5) (6) and the checking result of the step S2 are taken, and the component grading is carried out according to the Industrial building reliability identification Standard GB 50144;
(2) Rack system (2) component rating
When the components of the bracket system are graded, taking the parameters of the steps S1 (2) (3) (4) (6) and the checking result of the step S2, and grading the components according to the Industrial building reliability identification Standard GB 50144;
(3) Foundation system (3) component rating
When the foundation system is graded, taking the parameters of the step S1 ⑪ and the checking result of the step S2, and grading the components according to the Industrial building reliability identification Standard GB 50144;
2) Single item control rating: and for the dust remover meeting any one of the following single control rating indexes, the overall safety of the dust remover is rated as grade D, and the single control rating index is as follows:
(1) the support columns (21) are eccentric outwards relative to the box body upright columns (111) and have more than 1/3 of the side length of the sections of the support columns (21) or any support column (21) loses the supporting function;
(2) the head of the support column (21) is pressed locally and seriously deformed;
(3) the top of the support column (21) is higher than the adjacent Gao Cha mm by 20mm;
(4) the integral inclination of the box body (11) is more than or equal to 3/1000;
and step S4: structural and seating system evaluation: on the basis of the safety rating of the members in the step S3, the shell system (1), the support system (2) and the foundation base system (3) are rated according to the industrial building reliability identification standard GB50144 according to the proportion of the number of the members at each level in the system, and each system is rated as A, B, C or D level, wherein A is optimal and D is worst;
when the shell system (1) is rated, according to the proportion of the number of the components of the levels a, b, c and d in the shell system (1) of the component safety rating result of the step S3, the three parts of the box body (11), the ash hopper (12) and the air purifying chamber (13) are respectively rated according to the industrial building reliability identification standard GB50144, each part is rated as A, B, C, D, and the worst grade of the three parts is taken as the rating result of the shell system (1) according to the industrial building reliability identification standard GB 50144;
when the support system (2) is graded, the proportion of the component safety grading results a, b, c and d in the step S3 in the support system (2) is taken, and the support system (2) is graded according to the industrial building reliability identification standard GB 50144;
when the foundation base system (3) is graded, the proportion of the component safety grading results a, b, c and d of the step S3 in the foundation base system (3) is taken, and the foundation base system (3) is graded according to the industrial building reliability identification standard GB 50144;
when the support system (4) is graded, taking parameters in the R parts of the steps S1 (7) (8) (9) and a checking calculation result of the local pressure bearing capacity of the support (41) in the step S2, and giving a grading result of the support system (4) according to an industrial building reliability identification standard GB 50144;
step S5, overall evaluation: and (4) giving an integral safety rating result of the dust remover, A, B, C or grade D according to a single control rating result in the steps S4 and S3 and an industrial building reliability identification standard GB 50144.
2. The method for evaluating the safety of a dust remover structure according to claim 1, wherein: and the step S2 further comprises the steps of ensuring that the force transmission action, the rigidity distribution and the mass distribution between the shell system (1) and the bracket system (2) are consistent with the actual structure when the integral finite element model is established, and correcting the integral finite element model by taking the parameters of the steps S1 (2), (4), (5) and (9).
3. The method for evaluating the safety of a dust collector structure according to claim 1, wherein: in the step S2, when the box body upright post (111) is in an externally-attached mode, a local finite element model is established to calculate the pressure eccentricity of the box body upright post (111) to the support post (21)
According to the relative deviation
And eccentricity of pressure
To obtain the eccentricity of the upright column (111) of the box body to the support column (21)
(ii) a Wherein when
When the eccentric direction is the same, then
When is coming into contact with
When the eccentric direction is opposite, then
Off-center direction of rotation
The direction with the larger absolute value; according to the eccentricity
Correcting the integral finite element model in the step S2, and checking and calculating the component bearing capacity of the shell system (1) and the support system (2); extracting the column bottom reaction force of a support column (21) of the support system (2) to check the bearing capacity of the foundation system (3); when the local pressure structure at the support (41) is unreasonable, a local finite element model is established to check the bottom local pressure bearing capacity of the support (41), and the check result gives the ratio of the resistance to the load effect.
4. The method for evaluating the safety of a dust collector structure according to claim 1, wherein: in a step S4 of rating the seat system (4), the following item rating criteria are evaluated:
the standard of the eccentricity rating of the support is as follows:
if it is
If yes, the step is a;
if it is
If yes, the step is b;
if it is
Then is cA stage;
if it is
If so, the value is d grade;
wherein, the first and the second end of the pipe are connected with each other,
in order to obtain the eccentric amount of the pressure,
the length or diameter of the side of the support in the eccentric direction.
5. The method for evaluating the safety of a dust collector structure according to claim 4, wherein: upon rating of the seat system (4) in step S4, the following item rating criteria are further evaluated:
the rating standard of the sliding property of the support is as follows:
if the viscosity of the lubricating grease is normal and the friction surface is flat and has no corrosion, the lubricating grease is a grade a;
if the lubricating grease is solidified and the friction surface is slightly rusted, the grade b is determined;
if the jamming occurs, the grade is c.
6. The method for evaluating the safety of a dust collector structure according to claim 5, wherein: upon rating of the seat system (4) in step S4, the following item rating criteria are further evaluated:
the rating standard of the support limiting measure is as follows:
if an effective limiting measure is set, the level is a;
if no limit measure is set, the level is c.
7. The method for evaluating the safety of a dust collector structure according to claim 6, wherein: in step S4, the rating criteria of the seat system (4) are:
the grade A is evaluated as grade A without the grade c and grade d supports (41), and the grade b support (41) is contained, and the grade b support (41) is less than or equal to 30 percent of the total number of the supports (41);
the grade B is evaluated as grade B, wherein the grade D support (41) is not included, the grade c support (41) is included, and the grade c support (41) is less than or equal to 20 percent of the total number of the supports (41);
1 d-grade support exists in the non-peripheral support (41) and is rated as C-grade;
a D-grade support is arranged in the peripheral support (41) and is rated as D grade.
8. The method for evaluating the safety of a dust collector structure according to claim 1, wherein: and the step S5 comprises the step of taking the rating results of the shell system (1), the support system (2), the foundation base system (3) and the support system (4) and the lower level in the single control rating as the overall safety level of the dust remover, wherein the levels are A, B, C, D in the sequence from high to low.
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| CN105354358B (en) * | 2015-09-28 | 2018-11-09 | 广东电网有限责任公司电力科学研究院 | Wet electrical dust precipitator performance on-site verification method and system |
| CN105913185A (en) * | 2016-04-12 | 2016-08-31 | 大唐东北电力试验研究所有限公司 | Thermal power plant environment protection equipment online risk evaluation method and thermal power plant environment protection equipment online risk evaluation system |
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| DE102017131460A1 (en) * | 2017-06-08 | 2018-12-13 | Festool Gmbh | Configuration device for a system with machine tool and vacuum cleaner |
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