CN217240110U - Prefabricated substation adopting vertical split type underground transformer - Google Patents
Prefabricated substation adopting vertical split type underground transformer Download PDFInfo
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- CN217240110U CN217240110U CN202220350730.4U CN202220350730U CN217240110U CN 217240110 U CN217240110 U CN 217240110U CN 202220350730 U CN202220350730 U CN 202220350730U CN 217240110 U CN217240110 U CN 217240110U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a prefabricated substation adopting a vertical split type underground transformer, which comprises an outdoor box body arranged on the ground and a transformer well arranged in an underground cable trench, wherein the two parts are connected into a whole through a prefabricated rack and are in a three-dimensional structure with an upper layer of space and a lower layer of space; the outdoor type box body is internally provided with three compartments of a high-voltage distribution room, a low-voltage distribution room and a transformer overhaul room; a high-voltage power distribution cabinet is arranged in the high-voltage power distribution cabinet; a low-voltage power distribution cabinet is arranged in the low-voltage power distribution cabinet; an oil storage cabinet and a plurality of groups of finned radiators are arranged in the transformer overhaul room. The utility model has the advantages of novel structure, area are little, small, transformer assembly capacity is big, can effectively solve underground transformer ventilation cooling problem, be convenient for maintain, the cost is lower, transportation and installation basis construction are convenient, the site operation cycle is short, easily coordinate, can resist general flood disasters with the surrounding environment.
Description
The technical field is as follows:
the utility model belongs to the technical field of the transformer substation technique and specifically relates to indicate an adopt perpendicular split type underground transformer's prepackage type transformer substation.
Background art:
currently, the two types of transformer substations are applied to urban distribution networks, namely an underground transformer combined transformer substation with the national patent number of 200920171615.5 and a semi-underground pre-installed transformer substation with the national patent number of 202127186U, and have the same characteristics: the transformers of the transformer substation are all arranged in a relatively closed underground pit body, and a mode of locally exhausting air and dissipating heat outside the pit is adopted. Although the structural design of the semi-buried prefabricated substation with the patent number of 202127186U is improved to a certain extent in the heat dissipation effect compared with the buried transformer combined substation with the patent number of 200920171615.5, the defects that natural convection of air in a pit is not smooth and the heat dissipation of a transformer is slow are still very prominent. And the transformer is completely arranged in a relatively closed underground pit body, maintenance personnel are difficult to acquire the running state information of the transformer through observation, the maintenance is inconvenient, potential safety hazards are left, and the transformer with smaller capacity is generally selected and assembled in order to ensure the power supply safety of the transformer substation, so that the actual requirements of users are difficult to meet. In addition, in order to meet the requirement of temperature rise, the transformers of the two transformer substations generally adopt B-level insulating materials and high ignition point insulating oil, and the temperature rise of the oil on the top layer of the oil tank is reduced by adopting methods of increasing the volume of a transformer installation pit body, increasing the number of radiating fins of the oil tank, increasing the sectional area of a winding, reducing load loss and the like, so that the production cost is high directly. Meanwhile, the transformer installation pit is large in size, so that the transportation is difficult and the site construction of the installation foundation is complicated, and the production cost is increased indirectly.
The utility model has the following contents:
an object of the utility model is to overcome prior art not enough, provide a novel structure, area is little, small, transformer assembly capacity is big, can effectively solve underground transformer ventilation cooling problem, be convenient for maintain, the cost is lower, transportation and installation basis construction convenience, can resist general flood disasters, adopt perpendicular split type underground transformer's prepackage type transformer substation.
In order to achieve the above purpose, the technical scheme of the utility model is that: a prefabricated substation adopting a vertical split type underground transformer comprises an outdoor box body arranged on the ground and a transformer well arranged in an underground cable trench, wherein the outdoor box body and the transformer well are connected into a whole through a prefabricated rack, and the transformer well is of an upper-layer spatial three-dimensional structure and a lower-layer spatial three-dimensional structure.
The outdoor type box body is internally provided with three compartments of a high-voltage distribution room, a low-voltage distribution room and a transformer overhaul room which are arranged in a shape like a Chinese character 'mu' or a Chinese character 'pin'. Wherein a high-voltage power distribution cabinet is arranged in the high-voltage power distribution chamber of the outdoor box body; a low-voltage power distribution cabinet is arranged in the low-voltage power distribution cabinet; an oil storage cabinet and a plurality of groups of finned radiators are arranged in the transformer overhaul room.
Outdoor type box be fixed in subaerial channel-section steel rack on, the box is double-deck guard gate structure: the first layer is protective gates arranged on the outer surfaces of a high-voltage distribution room, a low-voltage distribution room and a transformer overhaul room, and advertising lamp boxes, iron art pictures or decorative battens are embedded on the gates, so that the appearance is attractive and various, and the coordination with the surrounding environment is easy; the second floor door is for setting up in the inside protection net door of touching of transformer maintenance room, avoids the unexpected radiator scald of touching of maintainer.
And large-scale ventilation shutters are arranged at the lower part of the protective gate on the outer surface of the outdoor box body. The top of the box body is provided with a large-scale exhaust passage, and the top end of the exhaust passage is provided with a rainproof canopy. The outdoor box body adopts the design of a vertical straight ventilation mode, and has stronger natural convection heat dissipation effect by utilizing the chimney effect.
The transformer well is composed of a transformer installation pit body arranged in an underground cable trench, a channel steel fixing rack and an underground transformer in the pit body, wherein the transformer installation pit body is made of anticorrosive metal materials or concrete, and an anti-leakage protective layer is arranged in the transformer installation pit body. One fifth of the height of the pit body is exposed out of the ground, four fifths of the height of the pit body is arranged in the underground cable trench, and the transformer mounting pit body is not easy to enter water due to the structural mode.
The underground transformer is fixed in the transformer mounting pit body, the oil tank body and the radiator adopt a vertical split structure, and the upper layer and the lower layer of space are arranged in a three-dimensional way: an oil storage cabinet and a plurality of groups of finned radiators are arranged above the oil tank cover, wherein an oil inlet at the bottom of the oil storage cabinet is provided with a plurality of metal pipes communicated with an oil outlet in the middle of the oil tank cover; an oil inlet pipe port of the finned radiator is communicated with an oil outlet at the lower part of the side wall of the oil conservator; the port of the oil outlet pipe of the finned radiator is communicated with oil return ports on two sides of the oil tank cover, and the oil return ports are communicated with an oil return pipe led from the lower part of the oil tank body through metal pipes. An oil pipe between an oil inlet at the bottom of the oil storage cabinet and an oil outlet of the oil tank cover is provided with a connecting flange or a butterfly valve; and a connecting flange or a butterfly valve is arranged on an oil pipe between the oil outlet pipe port of the finned radiator and the oil return port of the oil tank cover. The vertical split type oil tank structure adopts a Benard convection heat dissipation method: the transformer oil is heated and then floats upwards through the metal pipe at the oil outlet in the middle of the oil tank cover to enter the oil storage cabinet, then flows into each group of finned radiators from the oil storage cabinet, the hot oil flows into oil return ports on two sides of the oil tank cover after being radiated and cooled by the radiating fins, and finally the transformer oil which is cooled and cooled flows back to the bottom in the oil tank through the metal pipe communicated with the lower part of the oil tank body through the oil return ports, thus the natural circulation convection is continuously carried out. This oil tank structure has effectively improved cooling circuit's oil flow rate, has effectively improved transformer oil's thermal cycle efficiency, makes the radiating effect very showing.
The oil conservator and the finned radiator are arranged outside the transformer well and in a transformer overhaul compartment of the ground outdoor type box body, and form an upper layer and a lower layer of three-dimensional structure with the oil tank body. The structure mode is not only beneficial to natural ventilation and heat dissipation of the underground transformer, but also greatly reduces the volume of the underground transformer installation pit body, only about one fourth of the volume of the traditional buried transformer installation pit body, and can further reduce the occupied area and the production cost.
Be equipped with oil level gaugember, thermometer, vacuum pressure table, pressure relief valve and oiling valve on the oil conservator lateral wall, the daily maintenance of patrolling and examining of being convenient for.
And a fan is arranged below the finned radiator, can implement forced ventilation and accelerated cooling, and is connected with temperature switch control.
And the high-voltage wiring terminal and the low-voltage wiring terminal of the underground transformer are respectively provided with a sealing cover with the protection grade reaching IP68 for sealing. And the high-voltage wire inlet end and the low-voltage wire outlet end of the underground transformer are respectively connected with the high-voltage power distribution cabinet and the low-voltage power distribution cabinet by adopting power cables. By the structure, the underground transformer can effectively resist waterlogging invasion caused by rainstorm, and normal power supply can be ensured even if water enters the transformer mounting shell accidentally.
Compared with the prior art, the utility model: the underground transformer has the advantages of novel structure, small occupied area, small volume, large transformer assembly capacity, capability of effectively solving the problems of ventilation and heat dissipation of the underground transformer, convenience in maintenance, lower manufacturing cost, convenience in construction of transportation and installation foundations, short field construction period, easiness in coordination with the surrounding environment and capability of resisting general flood disasters. The reasonable double-layer type three-dimensional structure design ensures that the whole floor area is less than 4m 2 And only occupy the space above the very small ground, make it implement the radiation type power supply closer to the load center, shorten the radius of the power supply line and achieve the goal of energy conservation and consumption reduction. Particularly, the underground transformer oil tank adopts a Benard convection heat dissipation method and adopts a special vertical split type structure design: the radiator and the oil tank body are arranged in an upper layer and a lower layer in a three-dimensional way, and the radiator is arranged outside the transformer well and in a transformer overhaul room of a ground outdoor box body. This structural style has promoted the mounting height of radiator, makes transformer oil in circulation convection heat dissipation in-process, and cooling circuit's buoyancy obviously increases to improve cooling circuit's oil flow rate, effectively improved thermal cycle efficiency, more be favorable to the natural draft heat dissipation of transformer simultaneously, make the radiating effect very showing. Additional radiatorThe fan is arranged below the radiator, and can perform forced ventilation and accelerated cooling on the radiator. Compared with the underground transformer with the same specification and the conventional structure, the temperature rise of the oil on the top layer of the oil tank can be reduced by more than 10K, and the defect that the underground transformer radiates slowly in a pit is effectively overcome. On the premise of saving cost, a feasible solution is provided for the difficult problem of poor ventilation and heat dissipation when a large-capacity underground transformer is assembled in a traditional buried transformer substation, so that the power supply is safer, more reliable and more energy-saving. The utility model discloses it is extensive to be suitable for the occasion, the construction and the transformation of specially adapted city net.
Description of the drawings:
fig. 1 is a front view of a prefabricated substation using a vertical split type underground transformer according to the present invention;
fig. 2 is a side view of a prefabricated substation using a vertical split type underground transformer according to the present invention;
fig. 3 is a top view of a prefabricated substation using a vertical split type underground transformer according to the present invention;
fig. 4 is a partial cross-sectional view of fig. 1.
Fig. 5 is a partial cross-sectional view of fig. 2.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following examples.
According to shown in the attached drawings 1-5, the preferred embodiment of the present invention is a prefabricated substation using vertical split type underground transformer, which comprises an outdoor box body 1 placed on the ground and a transformer well 2 placed in an underground cable trench, wherein the outdoor box body 1 and the transformer well 2 placed underground are connected into a whole through a channel steel rack 10 (prefabricated rack) to reduce the occupied area as much as possible, and the prefabricated substation is of a three-dimensional structure with upper and lower layers, and the whole occupied area is less than 4m 2 。
The outdoor box body 1 is internally provided with three compartments of a high-voltage distribution room 3, a low-voltage distribution room 4 and a transformer overhaul room 5 which are arranged in a shape of a Chinese character 'mu'. Wherein a high-voltage distribution cabinet 6 is arranged in the high-voltage distribution room 3 of the outdoor box body 1; a low-voltage power distribution cabinet 7 is arranged in the low-voltage power distribution room 4; an oil conservator 8 and a plurality of groups of finned radiators 9 are arranged in the transformer overhaul room 5.
Outdoor type box 1 be fixed in subaerial channel-section steel rack 10 above, box 1 is double-deck guard gate structure: the first layer is a protective gate 11 arranged on the outer surfaces of a high-voltage distribution room 3, a low-voltage distribution room 4 and a transformer overhaul room 5, and an advertising lamp box 12 is embedded on each gate, so that the appearance is attractive and atmospheric, and the effects of beautifying the environment and advertising are achieved; the second floor door is for setting up in the inside protection net door 13 of touching of transformer service room 5, avoids the unexpected radiator scald of touching of maintainer.
The lower parts of the protective gates 11 on the outer surface of the outdoor box body 1 are provided with large-scale ventilation shutters 14; the top of the box body 1 is provided with a large exhaust channel 15, and the top end of the exhaust channel 15 is provided with a rain-proof awning 16. The outdoor box body 1 adopts the design of a vertical straight ventilation mode, and has stronger natural convection heat dissipation effect by utilizing the chimney effect.
The transformer well 2 is composed of a transformer installation metal pit body 17 arranged in a cable trench, a channel steel fixing rack 18 and an underground transformer 19 in the pit body, wherein the transformer installation metal pit body 17 is made of an anticorrosive metal material, the surface of the transformer installation metal pit body is sprayed by a ship, and an anti-leakage protective layer is arranged in the transformer installation metal pit body. One fifth of the height of the transformer installation metal pit body 17 is exposed out of the ground, and four fifths of the height is arranged in the underground cable trench, so that the transformer installation pit body is not easy to enter water in the structural mode.
The underground transformer 19 is fixed in the transformer mounting pit body 17; an oil tank body 20, a plurality of groups of finned radiators 9 and an oil conservator 8 are arranged above the underground transformer 19; the multiple groups of finned radiators 9 are respectively arranged on the front side and the rear side of the oil tank body 20; the oil conservator 8 is arranged on the top of the oil tank body 20.
The oil tank body 20 and the finned radiator 9 adopt a vertical split structure, and are arranged in an upper layer and a lower layer in a three-dimensional manner. An oil inlet at the bottom of the oil storage cabinet 8 is provided with a plurality of metal oil pipes 22 communicated with an oil outlet in the middle of the oil tank cover 21; the port of an oil inlet pipe 23 of the finned radiator 9 is communicated with an oil outlet at the lower part of the side wall of the oil conservator 8; the outlet pipe 24 of the plate radiator 9 has its port connected to oil return ports on both sides of the tank cap 21, and the oil return ports are connected to an oil return pipe 25 led from the lower portion of the tank body 20 through a metal pipe. And the oil pipe 22 between the oil inlet at the bottom of the oil storage cabinet 8 and the oil outlet of the oil tank cover 21 is provided with a connecting flange 26; and a connecting flange 27 is arranged on an oil pipe between the port of the oil outlet pipe 24 of the finned radiator 9 and the oil return port of the oil tank cover 21. The vertical split type oil tank structure adopts a Benard convection heat dissipation method: the transformer oil is heated and then floats upwards through the metal pipe 22 at the oil outlet in the middle of the oil tank cover 21 to enter the oil storage cabinet 8, then flows into each group of finned radiators 9 from the oil storage cabinet 8, the hot oil flows into the oil return ports on two sides of the oil tank cover 21 after being cooled by the heat dissipation of the radiating fins, and finally the cooled transformer oil flows back to the inner bottom of the oil tank through the metal pipe 25 communicated with the lower part of the oil tank body 20 through the oil return ports, thus the natural circulation convection is continuously performed. This oil tank structure has effectively improved cooling circuit's oil flow rate, has effectively improved transformer oil's thermal cycle efficiency, makes the radiating effect very showing.
The oil conservator 8 and the finned radiator 9 are arranged outside the transformer well 2 and in the transformer overhaul chamber 5 of the ground outdoor type box body 1, and form an upper-layer and lower-layer three-dimensional structure arrangement with the oil tank body 20. The structure mode is not only beneficial to natural ventilation and heat dissipation of the underground transformer, but also greatly reduces the volume of the underground transformer 19 installation pit body 17, only about one fourth of the volume of the traditional buried installation pit body, and can further reduce the occupied area and the production cost.
The side wall of the oil storage cabinet 8 is provided with a thermometer 28, an oil level gauge 31, a vacuum pressure gauge 29, a pressure release valve 30 and an oil injection valve 32, so that daily inspection and maintenance are facilitated.
A fan 33 is arranged below the finned radiator 9, forced ventilation and accelerated cooling can be implemented, and the fan 33 is connected with temperature switch control.
The high-voltage terminal and the low-voltage terminal of the underground transformer 19 are both provided with a sealing cover 34 with the protection grade reaching IP68 for sealing. And a high-voltage wire inlet end and a low-voltage wire outlet end of the underground transformer 19 are respectively connected with the high-voltage power distribution cabinet 6 and the low-voltage power distribution cabinet 7 by adopting power cables 35. The above structure enables the underground transformer 19 to effectively resist waterlogging caused by heavy rain, and normal power supply can be ensured even if the transformer mounting case 17 is accidentally filled with water.
The utility model is a complete set of equipment which is integrally assembled in a factory, which not only is convenient for transportation, but also can greatly shorten the on-site construction period; when the installation is carried out on site, the whole body is only required to be arranged on the installation foundation 36 for fixation.
The above-mentioned embodiments are only preferred embodiments of the present invention, not limiting the scope of the present invention, so that the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides an adopt vertical split type underground transformer's prepackage type transformer substation, includes outdoor type box (1) of arranging ground in and arranges transformer well (2) in underground cable ditch in, its characterized in that: the outdoor box body (1) is connected with a transformer well (2) arranged in an underground cable trench through a channel steel rack (10);
the outdoor box body (1) is internally provided with three compartments, namely a high-voltage distribution room (3), a low-voltage distribution room (4) and a transformer overhaul room (5);
a high-voltage power distribution cabinet (6) is arranged in the high-voltage power distribution room (3); a low-voltage power distribution cabinet (7) is arranged in the low-voltage power distribution room (4); an oil conservator (8) and a plurality of groups of finned radiators (9) are arranged in the transformer overhaul room (5).
2. The prefabricated substation adopting the vertical split type underground transformer according to claim 1, characterized in that:
the outdoor box body (1) is of a double-layer protective door structure:
the first layer is a protective large door (11) arranged on the outer surfaces of a high-voltage distribution room (3), a low-voltage distribution room (4) and a transformer overhaul room (5); an advertising lamp box (12) is embedded on the protective large door (11);
the second layer door is a touch-proof protective net door (13) arranged inside the transformer overhaul room (5).
3. The pre-assembled substation adopting the vertical split type underground transformer according to claim 2, characterized in that: the lower parts of the large protective doors (11) are provided with large ventilating shutters (14); a large-scale exhaust channel (15) is arranged at the top of the outdoor box body (1), and a rainproof canopy (16) is arranged at the top end of the exhaust channel (15).
4. A pre-assembled substation using a vertical split underground transformer according to any one of claims 1 to 3, characterized in that: the transformer well (2) is composed of a transformer installation pit body (17) arranged in an underground cable trench, a channel steel fixing rack (18) and an underground transformer (19).
5. The prefabricated substation adopting the vertical split type underground transformer according to claim 4, characterized in that: the transformer mounting pit body (17) is made of an anticorrosive metal material, and an anti-leakage protective layer is arranged in the transformer mounting pit body;
one fifth of the height of the transformer mounting pit body (17) is exposed out of the ground, and four fifths of the height of the transformer mounting pit body is arranged in the underground cable trench.
6. The pre-assembled substation adopting the vertical split type underground transformer of claim 5, wherein: the underground transformer (19) is fixed in the transformer mounting pit body (17); an oil tank body (20), a plurality of groups of finned radiators (9) and an oil conservator (8) are arranged above the underground transformer (19);
the multiple groups of finned radiators (9) are respectively arranged on the front side and the rear side of the oil tank body (20);
the oil conservator (8) is arranged on the top of the oil tank body (20).
7. The pre-assembled substation adopting the vertical split type underground transformer according to claim 6, characterized in that: an oil inlet at the bottom of the oil storage cabinet (8) is provided with a plurality of metal oil pipes (22) communicated with an oil outlet of the oil tank cover (21); the port of an oil inlet pipe (23) of the finned radiator (9) is communicated with an oil outlet at the lower part of the side wall of the oil conservator (8);
the port of the oil outlet pipe (24) of the finned radiator (9) is communicated with oil return ports on two sides of the oil tank cover (21), and the oil return ports are communicated with an oil return pipe (25) led up from the lower part of the oil tank body (20) through metal pipes.
8. The prefabricated substation adopting the vertical split type underground transformer according to claim 7, characterized in that: the side wall of the oil storage cabinet (8) is provided with a thermometer (28), an oil level gauge (31), a vacuum pressure gauge (29), a pressure release valve (30) and an oil filling valve (32).
9. The pre-assembled substation adopting the vertical split type underground transformer according to claim 6, characterized in that: and a fan (33) is arranged below the finned radiator (9).
10. The pre-assembled substation adopting the vertical split type underground transformer according to claim 4, wherein: and a high-voltage wire inlet end and a low-voltage wire outlet end of the underground transformer (19) are respectively connected with the high-voltage power distribution cabinet (6) and the low-voltage power distribution cabinet (7) by adopting power cables (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220350730.4U CN217240110U (en) | 2022-02-22 | 2022-02-22 | Prefabricated substation adopting vertical split type underground transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220350730.4U CN217240110U (en) | 2022-02-22 | 2022-02-22 | Prefabricated substation adopting vertical split type underground transformer |
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| CN217240110U true CN217240110U (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220350730.4U Active CN217240110U (en) | 2022-02-22 | 2022-02-22 | Prefabricated substation adopting vertical split type underground transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024069036A1 (en) * | 2022-09-28 | 2024-04-04 | Garcia Fuentes De La Fuente Juan | Modular transformation centre |
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2022
- 2022-02-22 CN CN202220350730.4U patent/CN217240110U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024069036A1 (en) * | 2022-09-28 | 2024-04-04 | Garcia Fuentes De La Fuente Juan | Modular transformation centre |
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