CN113076588B - BIM technology-based deep design flow and technology for transformer and distribution station - Google Patents
BIM technology-based deep design flow and technology for transformer and distribution station Download PDFInfo
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- CN113076588B CN113076588B CN202110472278.9A CN202110472278A CN113076588B CN 113076588 B CN113076588 B CN 113076588B CN 202110472278 A CN202110472278 A CN 202110472278A CN 113076588 B CN113076588 B CN 113076588B
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Abstract
The invention discloses a BIM technology-based deepened design flow and technology of a transformer and distribution substation, comprising the following steps: s1, signing and archiving a seal plate construction drawing delivery machine electric engineering total contractor unit; s2, confirming local power supply bureau requirements and inquiring confirmation; s3, determining the model number and civil engineering conditions of the electromechanical equipment; s4, establishing a power transformation and distribution station model and performing deepening design; s5, checking and counting the deep design model of the power transformation and distribution station and counting the engineering quantity; s6, checking and accepting engineering construction of the power transformation and distribution station. The invention controls the whole flow of the power transformation and distribution station machine room, uses the management view angles of engineering construction units and construction general contractor units to control the whole flow of the power transformation and distribution station machine room, and uses new technology and new method to make new management and control methods for deepened design flow, information feedback flow, main nodes, key areas, deepened schemes, cost control, quality supervision and the like. The construction method solves the problems of 'noisy, messy, pollution, waste, reworking' and other errors in the construction of the conventional power transformation and distribution station.
Description
Technical Field
The invention relates to the technical field of deep design processing and installation of a machine room of building electromechanical equipment, in particular to a deep design flow and process of a transformer and distribution substation based on a BIM technology.
Background
Some of the defects in the engineering flow of the conventional building project electromechanical transformation and distribution station are as follows: the management of the drawing version of the engineering construction drawing of the electric machine room is disordered, the primary deepening design (two-dimensional deepening) of the machine room is not in place, the secondary processing of construction sites is serious in sound, light and electricity pollution, equipment cannot enter the site for installation, a reserved embedded bracket is not in place, the installation of electromechanical equipment is not in strive for air and attractive, the secondary reworking quantity of the machine room is large, a power supply office does not recognize the installation result and cannot accept the installation result, and the problems of disordered file management, unclear responsibility division of functional departments and the like are solved.
Disclosure of Invention
The invention aims to provide a BIM technology-based substation deepening design flow and technology, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a kind of deep design flow and craft of transformer and distributor station based on BIM technology, including the following steps:
s1, signing and archiving a seal plate construction drawing delivery machine electric engineering total contractor unit;
s2, confirming local power supply bureau requirements and inquiring confirmation;
s3, determining the model number and civil engineering conditions of the electromechanical equipment;
s4, establishing a power transformation and distribution station model and performing deepening design;
s5, checking and counting the deep design model of the power transformation and distribution station and counting the engineering quantity;
s6, checking and accepting engineering construction of the power transformation and distribution station.
Preferably, the step S1 includes one or more of the following operations:
the construction drawing is transferred to a stamping version construction drawing of an electromechanical engineering general contractor unit by a construction unit, the stamping version construction drawing comprises at least 1 electronic grade drawing file and 3 paper grade drawing files, and a transfer proving material signed by each party is included, after the electronic grade drawing file, the 1 paper grade drawing file and the drawing transfer proving material are filed, the construction unit and the power supply unit are used for inquiring the engineering of the power distribution station, the business unit and the electromechanical unit are combined to conduct market research on transformer and high-low voltage cabinet equipment manufacturers, and the electromechanical unit is used for compiling equipment to change the deep design scheme, special construction scheme and construction period of the power distribution station.
Preferably, the step S2 specifically includes:
arrangement requirements, size distance requirements, metering mode requirements of high-low voltage cabinets, cable trench requirements, line-in and line-out type requirements, low-voltage feeder circuit switches or cable data requirements, transformer type requirements, high-low voltage cabinet equipment selection requirements, auxiliary cabinet selection requirements, net height of the power substation and door and window size requirements of electric equipment in the power substation.
Preferably, the step S3 specifically includes:
the system comprises equipment size, equipment model, installation requirements, production time and field sequence contents of electromechanical equipment such as transformers, high-low voltage cabinets, compensation cabinets, power double-cut cabinets, auxiliary cabinets, distribution boxes, bridges, fans, air pipes and the like;
and the condition information of the civil engineering of the transformer and distributor station is defined, and comprises cable trench size, door size and fire grade, beam lower clear height, wall column size, door and window position and distance condition between doors.
Preferably, the step S4 specifically includes:
and (3) establishing a three-dimensional model of the power transformation and distribution station according to the drawing content of the stamping version construction drawing, and carrying out deepening design on the power transformation and distribution station model according to the specific related information in the step (S2).
Preferably, the content of the deepened design of the substation model includes:
the arrangement of the transformer and the high-low voltage cabinet equipment is clear, and the size requirements of an operation space, a maintenance space, a replacement transportation space and a distance wall door are met, so that the conditions of the main electromechanical equipment installation space conditions of the power transformation and distribution station, such as the number of cables entering and exiting the power transformation and distribution station, the position routing of a cable trench, the position routing of a cable bridge, the arrangement azimuth of a lamp, the arrangement routing of an air pipe and the like, are determined, and the conditions of the installation fixing piece material selection and the position of the high-low voltage cabinet equipment, the cable bracket installation position in the cable trench, the cable bridge lifting bracket installation position, the fan lifting position, the air pipe lifting bracket installation position, the power transformation and distribution station distribution box installation position, the lamp lifting height and lifting positioning position, the switch socket point installation position, the arrangement position of gas fire-fighting equipment and the like are further determined. And after deepening, deriving the contents of a plane drawing, a section drawing, a three-dimensional drawing and an engineering quantity list of the transformer and distribution substation.
Preferably, the step S5 specifically includes:
after the engineering deepening design of the power transformation and distribution station is completed, a construction unit and an electromechanical total package unit conduct checking and checking on the model, drawing and engineering quantity list deepening results of the power transformation and distribution station, wherein the checking and checking include engineering quantity checking, cost checking, technical checking, construction period checking and installation checking contents, after checking, a local power supply department should be reported to conduct checking and recording, if the power supply department has a question, the power supply department should reply to the question and continue optimizing and modifying the model according to checking comments, and if checking is passed, the power transformation and distribution station deepening model, the power transformation and distribution station deepening drawing, checking and checking comments and documents are archived and backed up.
Preferably, the step S6 specifically includes:
after the electromechanical equipment contained in the transformer and distribution station engineering enters the field, the size and weight parameters are checked, whether the size of a field equipment transportation channel meets the equipment size requirement or not is further checked, whether the electromechanical equipment is allowed to be transported and installed in a reserved position in the transformer and distribution station or not is checked, the electromechanical installation requirement is checked by determining the civil engineering condition before entering the field installation, and the project special for the engineering installation of the transformer and distribution station is checked by an electromechanical engineering general contractor unit, so that the field installation sequence of the electromechanical equipment is defined.
Before formal acceptance, the interior of the electromechanical engineering general contractor unit should be subjected to acceptance, and the integrity of engineering data should be ensured for the engineering of the transformer and distribution station.
Compared with the prior art, the invention has the beneficial effects that:
the invention controls the whole flow of the power transformation and distribution station machine room, uses the management view angles of engineering construction units and construction general contractor units to control the whole flow of the power transformation and distribution station machine room, and uses new technology and new method to make new management and control methods for deepened design flow, information feedback flow, main nodes, key areas, deepened schemes, cost control, quality supervision and the like. The construction method solves the problems of 'noisy, messy, pollution, waste, reworking' and other errors in the construction of the conventional power transformation and distribution station. The environment-friendly dust-free construction and energy-saving environment-friendly construction of the machine room engineering are achieved, the environment-friendly, efficient and energy-saving installation and operation of the machine room are guaranteed, and the maintenance or equipment replacement of the machine room is facilitated. And the management and control of the construction period, the cost and the progress are controllable based on the new technology.
Drawings
FIG. 1 is a general flow diagram of the present invention;
FIG. 2 is a block diagram of the main flow of the present invention;
FIG. 3 is a schematic diagram of a substation deepening design flow and process based on BIM technology according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a substation deepening design flow and process based on BIM technology according to an embodiment of the present invention;
fig. 5 is a schematic diagram showing a deep design flow and process of a substation electrical device according to a BIM technology.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides a technical solution: a BIM technology-based deepened design flow and process for a transformer and distribution substation comprises various stages from drawing reception to organization acceptance.
The operations (1), (2) and (3) in fig. 1 are that the construction unit hands over to the seal version construction drawing of the electromechanical engineering total contractor, which contains at least 1 electronic grade drawing file and 3 paper grade drawing files, and the seal version construction drawing signed by each party, then the electronic grade drawing file, 1 paper grade drawing file and the paper transfer demonstration material are filed, the electromechanical part and the construction unit and the power supply office perform the inquiry of the power substation project, the commercial part and the electromechanical part combine to perform market research on equipment manufacturers such as transformers, high-low voltage cabinets and the like, and the electromechanical part compiles equipment to change the deep design scheme, special construction scheme and construction period of the power substation.
The requirements of the local power supply bureau on the project power transformation and distribution station comprise the requirements of arrangement of electric equipment in the power transformation and distribution station, the requirements of dimension distance, the requirements of metering modes of high-low voltage cabinets, the requirements of cable pit, the requirements of line in-out forms, the requirements of low-voltage feeder line loop switches or cable data, the requirements of transformer forms, the requirements of type selection of high-low voltage cabinet equipment, the requirements of type selection of auxiliary cabinets, the requirements of net height of the power transformation and distribution station, the requirements of dimension of doors and windows and the like.
The operations (4) and (5) in fig. 1 are to determine the sizes and types of all the electromechanical devices included in the substation engineering, including the sizes, the types, the installation requirements, the production time, the field sequence and the like of the electromechanical devices such as transformers, high-low voltage cabinets, compensation cabinets, power double-cut cabinets, auxiliary cabinets, distribution cabinets, bridges, fans, air pipes and the like. And the condition information of the civil engineering of the transformer and distributor station is defined, and the condition information comprises the conditions of cable pit size, door size, fire grade, beam lower clear height, wall column size, door and window position, door and door distance and the like.
The operations (6) and (7) in fig. 1 are to build a three-dimensional model of the substation according to the drawing content of the stamping version construction drawing, and to deeply design the substation model according to the relevant information defined in S2. The arrangement of the transformer and the high-low voltage cabinet equipment is clear, and the size requirements of an operation space, a maintenance space, a replacement transportation space, a distance-from-wall door and the like are met. The installation space conditions of main electromechanical equipment of the transformer substation, such as the number of cables entering and exiting the transformer substation, the position route of a cable trench, the position route of a cable bridge, the arrangement azimuth of a lamp, the arrangement route of an air pipe and the like, are determined. The conditions of material selection and position of the installation fixing piece of the high-low voltage cabinet equipment, installation position of a cable support in a cable trench, installation position of a cable bridge hoisting support, hoisting position of a fan, installation position of an air pipe hanger, installation position of a distribution box of a transformer substation, hoisting height of a lamp, hoisting positioning position, installation position of a switch socket point, arrangement position of fire-fighting equipment such as gas fire extinguishing and the like are further determined. And after deepening, deriving the contents of a plane drawing, a section drawing, a three-dimensional drawing and an engineering quantity list of the transformer and distribution substation. The building content of the machine room model comprises the following steps:
civil engineering condition model components (components including wall beam, plate column doors and windows, equipment foundations, cable trenches and the like) of a machine room;
all electromechanical devices of the machine room (including components such as transformers, high-low voltage cabinets, compensation cabinets, power double-cut cabinets, direct current screens, fans, air pipes, power distribution cabinets, lamps, sockets, fire detectors, fire sprinklers and the like);
all electromechanical pipelines and accessories (including cables, air pipes, bridge frames, valves, connecting bent pipes, wall bushings, flexible connections, meters and other components) of the machine room.
The operations (8) and (9) shown in fig. 1 are that after the engineering deep design of the transformer substation is completed, the construction unit and the electromechanical total package unit should check and examine the deep results of the model, drawing, engineering quantity list and the like of the transformer substation. The method comprises the steps of engineering quantity checking, cost checking, technical checking, construction period checking, installation checking and the like. After the verification is passed, the local power supply department should be reported for the verification and record. If the power supply department has a question, the power supply department shall reply to the question and continue to optimize the modification model according to the examination opinion. And if the examination passes, archiving and backing up the transformation and distribution station deepening model, the transformation and distribution station deepening drawing, the examination and examination opinion document.
In the operation of the drawing, after the electromechanical equipment contained in the power transformation and distribution station engineering enters the field, the size and weight parameters should be checked, and whether the size of the transportation channel of the field equipment meets the equipment size requirement or not is further checked, and whether the reserved position in the power transformation and distribution station allows the electromechanical equipment to be transported and installed in place or not is checked. Before entering installation, the civil engineering condition is determined to recheck the electromechanical installation requirement, and the electromechanical engineering general contractor unit rechecks the project installation special scheme of the transformer and distribution station, so as to determine the entering installation sequence of the electromechanical equipment. Before formal acceptance, the interior of the electromechanical engineering general contractor unit should be subjected to acceptance, and the integrity of engineering data should be ensured for the engineering of the transformer and distribution station.
The general flow block diagram of the deepened design flow and process of the transformer and distribution station based on BIM technology clearly describes the actions of each participating party and the control elements of the serious difficulties in the flow.
As shown in fig. 2, a main flow chart of a deepened design flow and process of a substation based on a BIM technology according to an embodiment of the present invention includes:
s1, signing and archiving a seal plate construction drawing delivery machine electric engineering total contractor unit;
the construction drawing is transferred to a stamping version construction drawing of an electromechanical engineering general contractor by a construction unit, the stamping version construction drawing comprises at least 1 electronic grade drawing file and 3 paper grade drawing files, and after the electronic grade drawing file, the 1 paper grade drawing file and the drawing transfer proving material are filed after the electromechanical engineering general contractor signs the stamping version construction drawing by all sides, the electromechanical part, the construction unit and a power supply bureau are used for inquiring the engineering of the power distribution station, and the commercial part and the electromechanical part are combined to carry out market investigation on equipment manufacturers such as transformers, high-low voltage cabinets and the like, and the electromechanical part is used for compiling equipment to change the deep design scheme, special construction scheme and construction period of the power distribution station.
S2, confirming local power supply bureau requirements and inquiring confirmation;
the requirements of the local power supply bureau on the project power transformation and distribution station comprise the requirements of arrangement of electric equipment in the power transformation and distribution station, the requirements of dimension distance, the requirements of metering modes of high-low voltage cabinets, the requirements of cable pit, the requirements of line in-out forms, the requirements of low-voltage feeder line loop switches or cable data, the requirements of transformer forms, the requirements of type selection of high-low voltage cabinet equipment, the requirements of type selection of auxiliary cabinets, the requirements of net height of the power transformation and distribution station, the requirements of dimension of doors and windows and the like.
S3, determining the model number and civil engineering conditions of the electromechanical equipment;
the size and the model of all electromechanical equipment contained in the power substation engineering are determined, and the size, the equipment model, the installation requirement, the production scheduling time, the field entering sequence and the like of the electromechanical equipment comprise a transformer, a high-low voltage cabinet, a compensation cabinet, a power double-switching cabinet, an auxiliary cabinet, a distribution box, a bridge, a fan, an air pipe and the like. And the condition information of the civil engineering of the transformer and distributor station is defined, and the condition information comprises the conditions of cable pit size, door size, fire grade, beam lower clear height, wall column size, door and window position, door and door distance and the like.
S4, establishing a power transformation and distribution station model and performing deepening design;
and (3) establishing a three-dimensional model of the power transformation and distribution station according to the drawing content of the stamping version construction drawing, and carrying out deepening design on the power transformation and distribution station model according to the specific related information in the step (S2). The arrangement of the transformer and the high-low voltage cabinet equipment is clear, and the size requirements of an operation space, a maintenance space, a replacement transportation space, a distance-from-wall door and the like are met. The installation space conditions of main electromechanical equipment of the transformer substation, such as the number of cables entering and exiting the transformer substation, the position route of a cable trench, the position route of a cable bridge, the arrangement azimuth of a lamp, the arrangement route of an air pipe and the like, are determined. The conditions of material selection and position of the installation fixing piece of the high-low voltage cabinet equipment, installation position of a cable support in a cable trench, installation position of a cable bridge hoisting support, hoisting position of a fan, installation position of an air pipe hanger, installation position of a distribution box of a transformer substation, hoisting height of a lamp, hoisting positioning position, installation position of a switch socket point, arrangement position of fire-fighting equipment such as gas fire extinguishing and the like are further determined. And after deepening, deriving the contents of a plane drawing, a section drawing, a three-dimensional drawing and an engineering quantity list of the transformer and distribution substation.
S5, checking and counting the deep design model of the power transformation and distribution station and counting the engineering quantity;
after the engineering deepening design of the power transformation and distribution station is completed, the construction unit and the electromechanical total package unit carry out checking on the deepening results such as models, drawings, engineering quantity lists and the like of the power transformation and distribution station. The method comprises the steps of engineering quantity checking, cost checking, technical checking, construction period checking, installation checking and the like. After the verification is passed, the local power supply department should be reported for the verification and record. If the power supply department has a question, the power supply department shall reply to the question and continue to optimize the modification model according to the examination opinion. And if the examination passes, archiving and backing up the transformation and distribution station deepening model, the transformation and distribution station deepening drawing, the examination and examination opinion document.
S6, checking and accepting engineering construction of the power transformation and distribution station;
after the electromechanical equipment contained in the transformer and distribution station engineering enters the field, the size and weight parameters are checked, whether the size of the field equipment transportation channel meets the equipment size requirement or not is further checked, and whether the reserved position in the transformer and distribution station allows the electromechanical equipment to be transported and installed in place or not is checked. Before entering installation, the civil engineering condition is determined to recheck the electromechanical installation requirement, and the electromechanical engineering general contractor unit rechecks the project installation special scheme of the transformer and distribution station, so as to determine the entering installation sequence of the electromechanical equipment. Before formal acceptance, the interior of the electromechanical engineering general contractor unit should be subjected to acceptance, and the integrity of engineering data should be ensured for the engineering of the transformer and distribution station.
As shown in fig. 3 and fig. 4, a substation deepening design flow and a substation deepening design drawing of a process based on a BIM technology according to an embodiment of the present invention may refer to the details of the steps of the method in the embodiment shown in fig. 1 and fig. 2, and the details of the steps of the method in the embodiment shown in fig. 2 are not described herein again.
Fig. 5 is a schematic diagram showing a deepened electrical equipment installation of a substation according to a deepened design flow and process of the substation based on the BIM technology according to an embodiment of the present invention. Comprising the following steps:
in the figure: the method comprises the following steps of low-voltage cabinet equipment arrangement illustration, cable trench arrangement illustration after cabinet lower cabinet, cable trench opening illustration, low-voltage cabinet stress component 10# channel steel illustration, cable support illustration in the cable trench, cable trench cover illustration and the like.
The invention controls the whole flow of the power transformation and distribution station machine room, uses the management view angles of engineering construction units and construction general contractor units to control the whole flow of the power transformation and distribution station machine room, and uses new technology and new method to make new management and control methods for deepened design flow, information feedback flow, main nodes, key areas, deepened schemes, cost control, quality supervision and the like. The construction method solves the problems of 'noisy, messy, pollution, waste, reworking' and other errors in the construction of the conventional power transformation and distribution station. The environment-friendly dust-free construction and energy-saving environment-friendly construction of the machine room engineering are achieved, the environment-friendly, efficient and energy-saving installation and operation of the machine room are guaranteed, and the maintenance or equipment replacement of the machine room is facilitated. And the management and control of the construction period, the cost and the progress are controllable based on the new technology.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A BIM technology-based deep design flow and process for a transformer and distribution substation are characterized by comprising the following steps:
s1, signing and archiving a seal plate construction drawing delivery machine electric engineering total contractor unit;
s2, confirming local power supply bureau requirements and inquiring confirmation;
s3, determining the model number and civil engineering conditions of the electromechanical equipment;
s4, establishing a power transformation and distribution station model and performing deepening design;
s5, checking and counting the deep design model of the power transformation and distribution station and counting the engineering quantity;
s6, checking and accepting engineering construction of the power transformation and distribution station;
the step S1 includes one or more of the following operations:
after the construction unit hands over to a stamping version construction drawing of the electromechanical engineering general contractor unit, the stamping version construction drawing comprises at least 1 electronic grade drawing file and 3 paper grade drawing files, and is provided with a hand-over proof material signed by each party, the electronic grade drawing file, the 1 paper grade drawing file and the drawing hand-over proof material are archived, the electromechanical part, the construction unit and the power supply bureau are used for inquiring the engineering of the power distribution station, the commercial part and the electromechanical part are combined to carry out market research on transformer and high-low voltage cabinet equipment manufacturers, and the electromechanical part is used for compiling equipment to change the deep design scheme, special construction scheme and construction period of the power distribution station to be approximately distributed;
the step S2 specifically includes:
arrangement requirements, size distance requirements, metering mode requirements of high-low voltage cabinets, cable trench requirements, line-in and line-out requirements, low-voltage feeder circuit switches or cable data requirements, transformer form requirements, high-low voltage cabinet equipment selection requirements, auxiliary cabinet selection requirements, net height of the power substation and door and window size requirements of electric equipment in the power substation;
the step S3 specifically includes:
the system comprises a transformer, a high-low voltage cabinet, a compensation cabinet, a power double-switching cabinet, an auxiliary cabinet, a distribution box, a bridge, a fan, equipment size of air duct electromechanical equipment, equipment model, installation requirements, production time and approach sequence content;
the condition information of the civil engineering of the transformer and distributor station is defined, and the condition information comprises cable pit size, door size and fire grade, beam lower clear height, wall column size, door and window position and distance condition between doors;
the step S4 specifically includes:
establishing a three-dimensional model of the power transformation and distribution station according to the drawing content of the stamping version construction drawing, and carrying out deepening design on the power transformation and distribution station model according to the specific related information in the step S2;
the content for deepening the design of the substation model comprises the following steps:
the arrangement of the transformer and the high-low voltage cabinet equipment is determined, and the size requirements of an operation space, a maintenance space, a replacement transportation space and a distance wall door are met, so that the number of cables entering and exiting a power substation, the position route of a cable trench, the position route of a cable bridge, the arrangement azimuth of a lamp and the arrangement space condition of main electromechanical equipment of the wind pipe arrangement route power substation are determined, the material selection and the position of an installation fixing piece of the high-low voltage cabinet equipment, the installation position of a cable bracket in the cable trench, the installation position of a cable bridge bracket, the installation position of a fan, the installation position of a wind pipe hanging bracket, the installation position of a distribution box of the power substation, the hoisting height and the hoisting positioning position of the lamp, the installation position of a switch socket point and the arrangement position condition of gas fire-extinguishing and fire-fighting equipment are further determined, and after the deepening, the plane drawing, the section drawing, the three-dimensional drawing and the engineering quantity list content of the power substation are derived;
the step S5 specifically includes:
after the engineering deepening design of the power transformation and distribution station is completed, a construction unit and an electromechanical total package unit conduct checking and checking on the model, drawing and engineering quantity list deepening results of the power transformation and distribution station, wherein the checking and checking include engineering quantity checking, cost checking, technical checking, construction period checking and installation checking contents;
the step S6 specifically includes:
after the electromechanical equipment contained in the power transformation and distribution station engineering enters the field, the size and weight parameters are checked, whether the size of a field equipment transportation channel meets the equipment size requirement or not is further checked, whether the electromechanical equipment is allowed to be transported and installed in a position reserved in the power transformation and distribution station or not is checked, the electromechanical installation requirement is checked under the civil engineering condition before the field installation is carried out, and the project special for the engineering installation of the power transformation and distribution station is checked by an electromechanical engineering general contractor unit, so that the field installation sequence of the electromechanical equipment is defined;
before formal acceptance, the interior of the electromechanical engineering general contractor unit should be subjected to acceptance, and the integrity of engineering data should be ensured for the engineering of the transformer and distribution station.
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