CN109713600B - Replacement construction method for rectifier unit of subway power supply system - Google Patents
Replacement construction method for rectifier unit of subway power supply system Download PDFInfo
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- CN109713600B CN109713600B CN201910109484.6A CN201910109484A CN109713600B CN 109713600 B CN109713600 B CN 109713600B CN 201910109484 A CN201910109484 A CN 201910109484A CN 109713600 B CN109713600 B CN 109713600B
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Abstract
The invention discloses a replacement construction method for a rectifier unit of a subway power supply system, which comprises the following steps of A, dismantling a pipeline and equipment of a subway rectifier unit equipment room; B. the equipment room wall body is dismantled, and the equipment room is communicated with the rail area; C. the old rectifier unit is dismantled and is transferred to a rail car in the rail traveling area from the equipment room; D. the new rectifier unit is transported by the rail car; and is transferred into the equipment room by the rail car; E. installing, debugging and transmitting power of the new rectifier unit; F. and recovering the wall, the equipment and the pipeline to finish construction. The subway power supply system rectifier unit replacement construction method can effectively solve the problems that the power supply load of the existing subway line is continuously increased, and the capacity expansion replacement is carried out on the rectifier unit when the traction transformer rectifier unit cannot meet the operation requirement.
Description
Technical Field
The invention relates to the field of subway construction, in particular to a replacement construction method for a rectifier unit of a subway power supply system.
Background
The rectifier set is the core equipment of a subway power supply system, consists of a rectifier transformer and a rectifier, and has the function of converting an alternating current power supply into 750V or 1500V direct current through transformation and rectification so as to provide electric energy for a subway electric locomotive.
With the rapid development of subway traffic in China, the time of departure clearance of vehicles is continuously shortened in order to meet the requirement that the passenger capacity of the existing operation line is continuously increased; the problem that arises from this is that the supply load increases continuously, which makes the traction substation rectifier unit that is installed according to the design initial capacity unable to satisfy the operation requirement, therefore must change the rectifier unit of bigger capacity in order to satisfy the operation needs.
Disclosure of Invention
The invention aims to overcome the defects that the power supply load of the existing subway line is continuously increased and a traction transformation rectifier unit cannot meet the operation requirement in the prior art, and provides a replacement construction method for a rectifier unit of a subway power supply system.
In order to achieve the above purpose, the invention provides the following technical scheme:
a replacement construction method for a rectifier unit of a subway power supply system comprises the following steps:
A. dismantling pipelines and equipment of a subway rectifier unit equipment room;
B. the equipment room wall body is dismantled, and the equipment room is communicated with the rail area;
C. the old rectifier unit is dismantled and is transferred to a rail car in the rail traveling area from the equipment room;
D. the new rectifier unit is transported by the rail car; and is transferred into the equipment room by the rail car;
E. installing, debugging and transmitting power of the new rectifier unit;
F. and recovering the wall, the equipment and the pipeline to finish construction.
Wherein, the rectifier unit is in the rail line district with transport between the equipment room, what demolish the wall body does the rail line district with the part position of division wall between the equipment room, what demolish promptly the wall body forms the interim door opening that satisfies equipment business turn over size and size, and not whole stifled division wall, the pipeline and the equipment of demolising are also for blockking fashioned partial pipeline and the equipment of interim door opening, not all pipeline and equipment.
During the replacement of the rectifier unit, the traction substation related loop needs to quit operation, and the load current of other traction substations of the power supply subarea is increased, so that certain potential safety hazard is brought; therefore, the time periods such as non-holidays and the like with relatively few driving numbers are selected for carrying out rectifier unit replacement construction, and the load current is calculated and verified to ensure the power supply safety; the construction time utilizes the window period of the subway night outage period. The rectifier unit belongs to large-scale equipment of a subway power supply system, is large in size and heavy in tonnage, and needs to be transported by using the rail car.
The subway power supply system rectifier unit replacement construction method can effectively solve the problems that the power supply load of the existing subway line is continuously increased, and the capacity expansion replacement is carried out on the rectifier unit when the traction transformer rectifier unit cannot meet the operation requirement.
Preferably, in the step A, the relevant pipelines and equipment of the lighting system, the fire extinguishing system, the ventilation system, the optical fiber and the guardrail are dismantled.
Preferably, in the step B, before the wall is dismantled, the track-following region is provided with a supporting template to protect the track, the looped network cable and the return cable.
Preferably, in the step B, before the wall body is removed, plastic cloth is integrally arranged in the rail area corresponding to the wall body to be removed, so that garbage generated in the removing process is conveniently treated in a centralized manner at one time, the construction time is favorably shortened, and the pressure of the transit time of the subway compound line is reduced.
Preferably, in the step B, after the wall body is removed, a dust-proof device is arranged on the formed temporary door opening to prevent dust from entering the equipment room.
Preferably, in the step C and the step D, when a height difference between the equipment room ground and the rail car is less than or equal to 20cm, a sleeper is used to set up a platform to eliminate the height difference between the equipment room ground and the rail car, a steel rail is arranged on the platform, a rectifier unit is arranged on the steel rail, in the step C, a hydraulic device is used to push the rectifier unit from the equipment room to the rail car, and in the step D, a hydraulic device is used to push the rectifier unit from the rail car to the equipment room.
Preferably, the fairing group is top loaded or unloaded with hydraulic jacks.
Preferably, in the step C and the step D, when the height difference between the equipment room ground and the rail car is greater than 20cm, a platform is set up between the equipment room ground and the rail car by using a sleeper, a temporary lifting hook is arranged at the top of the tunnel above the platform, and the temporary lifting hook is provided with an electric hoist; in the step C, the height of the platform is matched with the ground of the equipment room, a rectifying unit moves to the position below the electric hoist from the ground of the equipment room on a trolley pulled by a hand plate hoist, the electric hoist hoists the rectifying unit, sleepers of the platform are lowered layer by layer until the level of the rectifying unit is equal to that of the rail car, the trolley is arranged on the platform at a new height, the rectifying unit is arranged on the trolley, and the trolley is pulled by the hand plate hoist to move to the rail car; in step D, the platform height matches the railcar, the last rectifying unit of railcar is in on the dolly by hand plate block traction motion arrives the electric block below, electric block handling rectifying unit, the successive layer increases the sleeper of platform, until with equipment room ground level, new height set up on the platform the dolly, rectifying unit sets up on the dolly, again by hand plate block traction motion extremely in the equipment room.
Preferably, in the step E, a rectifier transformer in the rectifier unit is installed first, and then a rectifier in the rectifier unit is installed.
Preferably, in the step E, after the rectifier unit is installed, the rectifier transformer is subjected to an insulation resistance test, a direct current resistance test, a voltage ratio (transformation ratio) test of a tap, and an alternating current withstand voltage test, and the rectifier is subjected to a diode fuse protection test, a reverse current protection test, a frame protection (current element, voltage element) test, a voltage-sensitive protection test, and an over-temperature protection test.
Preferably, in the step E, after the rectifier unit is debugged, a live-line impact test is performed on the rectifier unit according to a power transmission scheme, and after the test is normal, power is transmitted to the overhead line system.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the subway power supply system rectifier unit replacement construction method can effectively solve the problems that the power supply load of the existing subway line is continuously increased, and the capacity expansion replacement is carried out on the rectifier unit when the traction transformer rectifier unit cannot meet the operation requirement.
Drawings
Fig. 1 is a schematic flow chart of a replacement construction method of a rectifier unit of a subway power supply system according to the present invention;
FIG. 2 is a schematic structural diagram of a rail transport rectifier unit using hydraulic equipment;
FIG. 3 is another schematic structural diagram of a rail transport rectifier unit using hydraulic equipment;
FIG. 4 is a schematic structural view of a motor hoist and a trolley transfer rectifier unit;
fig. 5 is another structure schematic diagram of the electric hoist and the trolley transfer rectifier unit.
The labels in the figure are: 1-a rectifier unit, 2-a device room, 3-a rail car, 4-a platform, 5-a hydraulic device, 6-a steel rail, 7-an electric hoist, 8-a trolley and 9-a plate hoist.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Examples
As shown in fig. 1 to 5, the method for replacing a rectifier unit of a subway power supply system according to the present invention comprises the following steps:
A. dismantling pipelines and equipment in an equipment room 2 of a subway rectifier unit 1;
B. the wall of the equipment room 2 is dismantled, and the equipment room 2 is communicated with the rail area;
C. the old rectifier unit 1 is dismantled and is transferred to a rail car 3 in the rail traveling area from the equipment room 2;
D. the new fairing group 1 is transported by the rail car 3; and transferred by the rail car 3 into the equipment room 2;
E. installing, debugging and power transmission of the new rectifier unit 1;
F. and recovering the wall, the equipment and the pipeline to finish construction.
Wherein, the rectifier unit 1 is in the rail line district with transport between the equipment room 2, what demolish the wall body do the rail line district with the part position of division wall between the equipment room 2, what demolish promptly the wall body forms the interim door opening that satisfies equipment business turn over size and size, and not whole stifled division wall, the pipeline and the equipment of demolising are also for blockking fashioned partial pipeline and the equipment of interim door opening, not all pipeline and equipment. During the replacement of the rectifier unit 1, the traction substation related loop needs to quit operation, and the load current of the rest traction substations of the power supply subarea is increased, so that certain potential safety hazard is brought; therefore, the time periods such as non-holidays and the like with relatively few traveling numbers are selected to carry out replacement construction on the rectifier unit 1, and the load current is calculated and verified to ensure the power supply safety; the construction time utilizes the window period of the subway night outage period. The rectifier unit 1 belongs to large-scale equipment of a subway power supply system, is large in size and heavy in tonnage, and needs to be transported by using the rail car 3.
As a preferable scheme of this embodiment, in the step a, the relevant pipelines and equipments of the lighting system, the fire extinguishing system, the ventilation system, the optical fiber and the guardrail are removed. And (3) disconnecting the related power supply to find the steel pipe connection point with the nearest distance of the lighting loop in the wall body dismantling range, disconnecting the cable at the steel pipe connection point, dismantling the fixed clamp on the wall body, moving the pipeline down to the side wall of the rail running area below the ground of the equipment room 2, dismantling the equipment such as lighting lamps and evacuation indicator lamps in the wall body dismantling range, laying a temporary cable to temporarily connect the lighting loop, fixing firmly, and ensuring the normal use of the interval lighting and evacuation indicator system during construction. Dismantling the fire extinguishing system, closing a gas fire extinguishing nozzle loop of a rectifier transformer chamber at the tail end of a control loop, beating a gas fire extinguishing control panel to a manual state, dismantling the gas fire extinguishing nozzle and carrying out protective wrapping on the tail end; the control circuit of the light alarm and the gas extinguishing terminal box of the rectifier transformer chamber is closed at the tail end of the control circuit, cables of the light alarm and the gas extinguishing terminal box are numbered and are wrapped and protected at the end, the light alarm and the gas extinguishing terminal box are detached and temporarily protected and placed in a spare part room, the smoke control circuit is closed during construction, smoke, temperature and the like are covered by a special protective cover, and the pollution of dust and the like generated in the construction process is prevented. It is right ventilation system demolish, close in the equipment room 2 ventilation system, the heat preservation cotton of the air pipe junction flange that will need to demolish is demolishd, demolishs tuber pipe connecting bolt, and the segmentation is demolishd the tuber pipe, seals the tuber pipe mouth of pipe at tuber pipe both ends with the protection cloth, prevents in dust and the foreign matter entering air pipe. And (3) the optical fiber is removed, the optical fiber loop is closed, the fixed suspension steel wire on the wall body is removed, the steel wire and the optical fiber are moved downwards to the side wall of the rail-mounted area below the ground level of the equipment room 2, and the steel wire and the optical fiber are temporarily and firmly fixed, so that the normal use of the optical fiber during construction is ensured. And (4) dismantling the guardrail, cutting the guardrail of the equipment access passage, polishing the cut and performing temporary protection.
As a preferable scheme of this embodiment, in step B, before the wall is removed, the temporary doorway position to be removed is marked on the wall in the equipment room 2, so as to ensure that the accuracy and size of the removal position meet the requirements, a template is supported in the rail area to protect the track, the looped network cable and the return cable, and then a thickened plastic cloth is integrally arranged in the rail area corresponding to the wall to be removed, so that garbage generated in the removal process is conveniently concentrated at one time, thereby facilitating reduction of construction time and pressure of subway compound line passing time. After the wall body is dismantled, a dustproof device is arranged on a formed temporary door opening to prevent dust from entering the equipment room 2, and the dustproof device comprises a steel pipe framework arranged at the temporary door opening and fireproof tarpaulin connected with the steel pipe framework.
As a preferable scheme of this embodiment, the new rectifier unit 1 is transported to a vehicle section unloading platform, the new rectifier unit 1 is hoisted to the rail car 3 by a crane, the new rectifier unit 1 is fixed on the rail car 3 by a steel wire rope and a hand plate hoist (9), when two rectifier transformers are fixed simultaneously, the center line of the rectifier transformer is consistent with the center line of the temporary door opening of the equipment room 2, and the equipment must be fixed firmly.
As a preferred scheme of this embodiment, in step C, the construction site pulls the rectifier unit 1 to stop operation, the rectifier transformer feeder switch cabinet grounding knife switch and the circuit breaker are switched on, the direct-current switch cabinet is pulled out, the negative pole cabinet isolation knife switch is switched off, and the rectifier transformer feeder switch cabinet controls all the power supplies to be turned off; the AC/DC control power supply from the AC/DC screen to the rectifier cabinet is turned off; and marking and dismantling the primary and secondary cables of the rectifier transformer and the rectifier cabinet, retreating the cable head into a cable interlayer of the substation, and fixing the cable head on a cable support. Dismantling a high-low voltage cable fixing support and a mesh grid which affect construction in a room; and (3) dismantling the rectifier transformer and the rectifier cabinet base fixed connecting bolts, moving the rectifier unit 1 to the temporary door opening of the equipment room 2, and loading after the rail car 3 arrives.
As a preferable scheme of this embodiment, in the step C and the step D, when a height difference between the ground of the equipment room 2 and the rail car 3 is less than or equal to 20cm, a sleeper building platform 4 is used to eliminate the height difference between the ground of the equipment room 2 and the rail car 3, a steel plate is arranged on the platform 4, a steel rail 6 is arranged on the steel plate, the rectifying unit 1 is arranged on the steel rail 6, in the step C, the rectifying unit 1 is pushed to the rail car 3 from the equipment room 2 by using a hydraulic device 5, in the step D, the rectifying unit 1 is pushed to the equipment room 2 from the rail car 3 by using the hydraulic device 5, and the rectifying unit 1 is pushed to be loaded or unloaded by using a hydraulic jack.
As a preferable scheme of this embodiment, in the step C and the step D, when a height difference between the ground of the equipment room 2 and the rail car 3 is greater than 20cm, a platform 4 is set up between the ground of the equipment room 2 and the rail car 3 by using sleepers, a temporary hook is arranged at the top of the tunnel above the platform 4, and the temporary hook is provided with an electric hoist 7; in the step C, the platform 4 is matched with the ground of the equipment room 2 in height, the rectifier unit 1 moves to the position below the electric hoist 7 from the ground of the equipment room 2 on a trolley 8 pulled by a hand plate hoist 9, the electric hoist 7 hoists the rectifier unit 1, sleepers of the platform 4 are lowered layer by layer until the sleepers are level to the rail car 3, the trolley 8 is arranged on the platform 4 at a new height, the rectifier unit 1 is arranged on the trolley 8, and then the trolley 8 is pulled by the hand plate hoist 9 to move to the rail car 3; in step D, 4 high matchings of platform the railcar 3, rectifier unit 1 is in on the railcar 3 on dolly 8 by hand plate hoist 9 traction movement arrives 7 below of electric block, 7 handling rectifier units 1 of electric block, the successive layer increases the sleeper of platform 4, until with 2 ground level in equipment room, new height set up on platform 4 dolly 8, rectifier unit 1 sets up on dolly 8, again by hand plate hoist 9 traction movement extremely in the equipment room 2.
As a preferred scheme of this embodiment, after the rectifier transformer enters the equipment room 2, the rectifier transformer is rolled by a steel pipe to be moved to a position corresponding to the foundation embedded channel steel, a hydraulic jack is arranged below a transformer base to jack the transformer up and take out the steel pipe, and the transformer is slowly dropped after the position of the transformer is adjusted; after the transformer main body is in place, the reference line of the transformer main body is checked and adjusted to be matched with the center line of the foundation, the main body is in a horizontal state, and after the transformer is in place, personal inspection is carried out, and if the appearance is not damaged, whether connection is loose, whether insulation is damaged or not and the like are carried out, a transformer grounding wire is installed; laying and secondary wiring of a transformer cable lead-out wire, checking the wiring of each loop after wiring, and performing fireproof plugging on a bolt installation operation pit and a cable hole after equipment installation. Installing a rectifier, installing an insulating plate between a basic channel steel and a cabinet body, wiping the surfaces of the insulating plate and the channel steel by cotton cloth, fixing the insulating plate on the basic channel steel by epoxy resin glue, and ensuring the correct position of the insulating plate by a method for measuring the length of a diagonal line and matching with an angle square; placing the rectifier cabinet on an insulating plate, ensuring that the insulating plate is exposed out of the outer edge of an equipment frame, checking that the equipment has no obvious grounding point, adjusting the cabinet body to be horizontal and vertical, arranging a mounting hole on the cabinet body frame of the rectifier cabinet, wherein the mounting hole is right opposite to a lower basic channel steel, and forming a hole on the lower channel steel according to the position of the mounting hole of the cabinet body frame; when no mounting hole or an inappropriate mounting hole is formed in the cabinet body, the fixing feet of the cabinet body are mounted on the frame by using self-tapping screws, the fixing feet face the lower foundation channel steel, and then holes are formed in the lower channel steel according to the positions of the holes in the fixing feet.
As a preferable scheme of this embodiment, in the step E, the rectifier transformer in the rectifier unit 1 is installed first, and then the rectifier in the rectifier unit 1 is installed. After the rectifier unit 1 is installed, an insulation resistance test, a direct current resistance test, a voltage ratio (transformation ratio) test of a tap and an alternating current withstand voltage test are carried out on the rectifier transformer, and a diode fusing protection test, a reverse current protection test, a frame protection (current element and voltage element) test, a voltage-sensitive protection test and an over-temperature protection test are carried out on the rectifier. In the step E, after the rectifier unit 1 is debugged, a live-line impact test is performed on the rectifier unit 1 according to the power transmission scheme, and after the normal observation is performed, the subway operation and dispatching department gives consent to the test, and then power is transmitted to the overhead line system.
By applying the replacement construction method for the rectifier unit 1 of the subway power supply system, the problem that the power supply load of the existing subway line is continuously increased, and the expansion replacement is carried out on the rectifier unit 1 when the traction power transformation rectifier unit 1 cannot meet the operation requirement can be effectively solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A replacement construction method for a rectifier unit of a subway power supply system is characterized by comprising the following steps:
A. dismantling pipelines and equipment in an equipment room (2) of a subway rectifier unit (1);
B. the wall of the equipment room (2) is dismantled, and the equipment room (2) is communicated with the rail area;
C. the old rectifier unit (1) is dismantled and is transferred to a rail car (3) of the rail area from the equipment room (2);
D. the new rectifier unit (1) is transported by the rail car (3); and transferred by the rail car (3) into the equipment room (2);
E. installing, debugging and power transmission of the new rectifier unit (1);
F. recovering the wall, the equipment and the pipeline to finish construction;
in the step C and the step D, when the height difference between the ground of the equipment room (2) and the rail car (3) is smaller than or equal to 20cm, a sleeper building platform (4) is used for eliminating the height difference between the ground of the equipment room (2) and the rail car (3), a steel rail (6) is arranged on the platform (4), a rectifying unit (1) is arranged on the steel rail (6), in the step C, a hydraulic device (5) is used for pushing the rectifying unit (1) to the rail car (3) from the equipment room (2), and in the step D, the hydraulic device (5) is used for pushing the rectifying unit (1) to the equipment room (2) from the rail car (3);
or in the step C and the step D, when the height difference between the ground of the equipment room (2) and the rail car (3) is greater than 20cm, a platform (4) is erected between the ground of the equipment room (2) and the rail car (3) by using sleepers, a temporary lifting hook is arranged at the top of a tunnel above the platform (4), the temporary lifting hook is provided with an electric hoist (7), in the step C, the platform (4) is highly matched with the ground of the equipment room (2), the rectifying unit (1) moves to the position below the electric hoist (7) from the ground of the equipment room (2) on a trolley (8) pulled by a hand-plate hoist (9), the electric hoist (7) lifts the rectifying unit (1), the sleepers of the platform (4) are lowered layer by layer until the sleepers are level with the rail car (3), and the trolley (8) is arranged on the platform (4) at a new height, rectifier unit (1) sets up on dolly (8), again by hand plate block (9) pulls dolly (8) move extremely on railcar (3), in step D, platform (4) highly match railcar (3), rectifier unit (1) is in on railcar (3) by hand plate block (9) pull move to electric block (7) below on dolly (8), electric block (7) handling rectifier unit (1), the successive layer increases the sleeper of platform (4), until with equipment room (2) ground level, at new height set up on platform (4) dolly (8), rectifier unit (1) sets up on dolly (8), again by hand plate block (9) pull move to in the equipment room (2).
2. A method for replacing a rectifier unit of a subway power supply system as claimed in claim 1, wherein in said step a, the relevant pipelines and equipments of the lighting system, the fire extinguishing system, the ventilation system, the optical fiber and the guardrail are removed.
3. A method for replacing a rectifier unit of a subway power supply system as claimed in claim 1, wherein in said step B, before said wall is removed, a template is supported in said rail-bound region to protect the rail, the looped network cable and the return cable.
4. A method for replacing a rectifier unit of a subway power supply system as claimed in claim 1, wherein in said step B, before said wall is removed, a plastic cloth is integrally disposed in said rail area corresponding to the wall to be removed.
5. A method for replacing a rectifier unit of a subway power supply system as claimed in claim 1, wherein in said step B, after said wall is removed, a dustproof device is installed on the formed temporary door opening.
6. A subway power supply system rectifier unit replacement construction method as claimed in claim 1, characterized in that the rectifier unit (1) is lifted up for loading or unloading by hydraulic jacks.
7. A subway power supply system rectifier unit replacement construction method as claimed in claim 1, wherein in said step E, the rectifier transformer in the rectifier unit (1) is installed first, and then the rectifier in the rectifier unit (1) is installed.
8. The replacement construction method for the rectifier unit of the subway power supply system according to claim 1, wherein in the step E, after the rectifier unit (1) is debugged, a live impact test is performed on the rectifier unit (1) according to a power transmission scheme, and after the test is normally observed, power is transmitted to a contact network.
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