CN110858705A - Construction method of box-type substation - Google Patents
Construction method of box-type substation Download PDFInfo
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- CN110858705A CN110858705A CN201810975010.5A CN201810975010A CN110858705A CN 110858705 A CN110858705 A CN 110858705A CN 201810975010 A CN201810975010 A CN 201810975010A CN 110858705 A CN110858705 A CN 110858705A
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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Abstract
The invention discloses a construction method of a box-type substation, belonging to the field of power construction, and the technical scheme is as follows: the construction method comprises the following steps: s1, constructing a box transformer substation foundation, wherein the box transformer substation foundation is a bare concrete foundation, and the upper end surface of the foundation is higher than the ground; s2, cable laying and fireproof plugging device construction, wherein a cable trench is arranged, a cable is laid, a fireproof plugging device is arranged at the bottom of the box transformer substation, and the fireproof plugging device is also arranged in the process of laying the cable to the electric equipment; and S3, constructing the anti-collision fence, wherein the anti-collision fence is arranged at a position 1-2m away from the box-type substation. The method has the advantages that water and small animals on the ground can be prevented from entering the box-type substation, and the fire can be prevented from spreading when the cable is on fire.
Description
Technical Field
The invention relates to the field of power construction, in particular to a construction method of a box-type substation.
Background
The box-type transformer substation (box transformer for short) is a high-voltage switch equipment, distribution transformer and low-voltage distribution equipment, and is a factory prefabricated indoor and outdoor compact distribution equipment which is integrated according to a certain wiring scheme, i.e. the functions of high-voltage receiving, transformer voltage reduction and low-voltage distribution are organically combined together, and is mounted in a damp-proof, rust-proof, dust-proof, rat-proof, fire-proof, theft-proof, heat-insulating, fully-closed and movable steel structure box body, and is mechanically-electrically integrated and fully-closed operation.
A community has 3 public low-voltage transformer areas of 05070400189#, 05070400406#,05070400407 #. The station area profile is as follows:
1. 05070400189 the construction type of the power distribution station is indoor transformer, the type of the transformer is SBH15-M, the capacity is 630kVA, the operation time is 2009-5 months, 2016-7 months, the maximum load current of the low-voltage side is: phase A698A, B phase 486A, C phase 780A, namely the highest load rate of the distribution transformation is 85.98%;
2. the 05070400406 power distribution station is constructed in the mode of indoor transformer, the type of the transformer is SBH15-M, the capacity is 630kVA, the commissioning time is 5 months in 2010, and the maximum load current appearing at the low-voltage side is 2016 (7 months in 2010): a phase 248A, B phase 330A, C phase 448A, namely the highest load rate of the distribution is 49.38%;
3. 05070400407 the construction type of power distribution station is indoor change, transformer model is SBH15-M, capacity is 630kVA, commissioning time is 2012/7/month, 2016/7/month the maximum load current that appears at the low-voltage side is: phase A326A, B phase 294A, C phase 282A, i.e. the highest loading rate of the formulation was 35.93%.
There are problems:
1. nearby projects are more, the requirement on workers is higher, and with the increase of commercial load, the load rate in 2017 is expected to reach 94.58% in the No. 00189 distribution transformer;
2. the natural increase of loads of residents and users, the increase of high-power electric equipment:
3. the increase of the power consumption and the increase of the equipment load rate can cause the circuit to generate heat seriously due to the circuit load operation in the power supply peak period, and has potential safety hazard.
Aiming at the problems, one 800kVA box transformer substation needs to be installed again, cables are arranged again, a certain precautionary measure is provided for the fire disaster of the box type transformer substation due to short circuit, and a construction method of the box type transformer substation is provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a box-type transformer substation, which has the advantages that: the method can prevent water and small animals on the ground from entering the box-type substation, and can prevent the fire from spreading when the cable is on fire.
The technical purpose of the invention is realized by the following technical scheme:
the construction method of the box-type substation comprises the following steps:
s1, constructing a box transformer substation foundation, wherein the box transformer substation foundation is a bare concrete foundation, and the upper end surface of the foundation is higher than the ground;
s2, cable laying and fireproof plugging device construction, wherein a cable trench is arranged, a cable is laid, a fireproof plugging device is arranged at the bottom of the box transformer substation, and the fireproof plugging device is also arranged in the process of laying the cable to the electric equipment;
and S3, constructing the anti-collision fence, wherein the anti-collision fence is arranged at a position 1-2m away from the box-type substation.
Through above-mentioned technical scheme, the box-type substation on the basis up end is higher than ground and when placing box-type substation on the basis, can prevent on the one hand subaerial rainwater from getting into box-type substation, and on the other hand prevents that the toy from getting into box-type substation and causing the damage of inside electrical components. The setting of fire prevention plugging device can reduce the intensity of a fire when the cable catches fire and stretch, prevents to form great fire incident, causes bigger damage and causes the personal danger to equipment, and the setting of anticollision fence keeps apart box-type substation and external world, prevents that irrelevant personnel from getting into, reduces the artificial probability of damaging to box-type substation on the one hand, and on the other hand also can prevent that box-type substation fires often and stretch and cause the casualties.
The invention is further configured to: in step S1, the construction of the box-type substation foundation includes the following steps:
s1-1: excavating a box transformer foundation pit, mechanically excavating to a bearing stratum, manually cleaning the bottom of the rest part until the bottom of the embedded flat steel is excavated, and removing sundries such as garbage, soil and the like on foundation soil;
s1-2: lightning protection grounding, wherein a cable is embedded, a lightning arrester is arranged on the cable, and the grounding end of the lightning arrester is connected with a cable sheath and reliably connected with a grounding device of electrical equipment; the grounding device mainly comprises a horizontal grounding body and an auxiliary vertical grounding body, the horizontal grounding body is made of hot-dip galvanized round steel, and the vertical grounding electrode is made of hot-dip galvanized angle steel or steel pipe;
s1-3: constructing a cushion layer, namely pouring and tamping a concrete cushion layer, adopting a C15 concrete cushion layer, binding reinforcing steel bars after the strength of the cushion layer meets the design requirement, vibrating by using a flat vibrator in the pouring process to ensure the flatness of the surface of the cushion layer, finishing the surface after pouring the cushion layer, arranging a water collecting well, and filling a medium-coarse sand layer in the water collecting well;
s1-4: and (3) pouring concrete, pouring the periphery of the cushion layer to form a C25 plain concrete masonry, pouring C25 concrete on the masonry to form a concrete coping, arranging a steel bar in the coping, placing the box-type substation at the upper end of the coping, and enabling the upper end surface of the coping to be higher than the ground.
Through above-mentioned technical scheme, the overhead terminal surface is higher than ground for when box-type substation placed on the overhead, on the one hand can prevent subaerial rainwater from getting into box-type substation, and on the other hand prevents that the toy from getting into box-type substation and causing the damage of inside electrical components. The water in the foundation is discharged through the water collecting opening, and the water in the foundation can quickly permeate through the medium coarse sand due to the medium coarse sand.
The invention is further configured to: and step S1-4, welding an embedded channel steel in the coping, wherein the channel steel is welded with the box-type substation, and the upper end surface of the channel steel is higher than the upper end surface of the foundation.
Through above-mentioned technical scheme, the pre-buried and the welding operation of channel-section steel are comparatively convenient, and the welded connected mode of channel-section steel makes the bearing capacity of channel-section steel higher moreover.
The invention is further configured to: and step S1-4, embedding expansion bolts in the pressure tops, and fixedly connecting the box-type substation with the connecting nuts through the expansion bolts.
The invention is further configured to: in the step S2, the construction of the fireproof blocking device comprises construction S2-1 of the fireproof blocking device for the incoming line at the bottom end of the box-type substation, construction S2-2 of fireproof blocking of a wall through hole of a cable trench and construction S2-3 of a fire retardant wall of an outdoor cable.
Through above-mentioned technical scheme, when box-type substation bottom inlet wire fire prevention plugging device can prevent that the cable in addition to the box-type substation from arousing the conflagration because of reasons such as short circuit, prevent that the intensity of a fire from stretching to cause the damage to inside spare part in the box-type substation, the cable pit is worn wall hole fire prevention shutoff and outdoor cable fire-retardant wall's setting and is separated the cable, when certain section cable is on fire, can control the intensity of a fire between the fire-retardant wall, prevents that the intensity of a fire from stretching.
The invention is further configured to: step S2-1 construction of the box-type substation bottom inlet wire fireproof plugging device comprises the following steps:
s2-1-1: a cable hole for a cable to pass through is formed in the bottom of the box-type substation, and a fireproof plate is fixed to the bottom of the box-type substation through angle steel;
s2-1-2: the cables on the two sides of the cable hole are coated with fireproof coatings, the cable periphery in the cable hole is filled with organic blocking materials, and the rest part of the cable hole is filled with fireproof bags;
s2-1-3: the seams between the fireproof plate and the box-type substation are sealed by elastic fireproof sealing glue, and expansion type fireproof sealing glue is adopted between the fireproof plate and the cable.
Through above-mentioned technical scheme, the fire prevention board is kept apart box-type substation with the setting of fire prevention package, prevents that the cable intensity of a fire from stretching to inside the box-type substation, and the cooperation of fire prevention board and the sealed glue of fire prevention has good gas tightness and smoke tightness when guaranteeing the effect of the fire prevention shutoff of fire prevention board.
The invention is further configured to: step S2-2 construction of cable trench through-wall hole fire prevention shutoff includes the following steps:
s2-2-1: the fireproof plates are fixedly connected to two sides of the wall body, the cables on the outer sides of the fireproof plates are coated with fireproof coatings, organic blocking materials are filled around the cables in the cable trench, and the rest parts of the cable holes are filled with fireproof bags;
s2-2-2: the seams between the fireproof plate and the wall body are sealed by elastic fireproof sealing glue.
Through above-mentioned technical scheme, through the setting of PLASTIC LAMINATED and fire prevention package prevent stretching of intensity of a fire.
The invention is further configured to: the outdoor cable fire-retardant walls are arranged at intervals of 60-100m, and the construction of the outdoor cable fire-retardant walls in the step S2-3 comprises the following steps:
s2-3-1: fixing the fireproof plates on two sides of the wall body through angle steel and expansion bolts which are subjected to rust-proof and fireproof treatment;
s2-3-2: the cable trench is characterized by comprising a brick concrete body built by bricks at the bottom end of the cable trench, the brick concrete body is provided with a drainage hole in a penetrating manner, a fireproof plate is arranged on the upper end face of the brick concrete body, and a cable outside the fireproof plate is coated with fireproof paint;
s2-3-3: the bottom of the cable trench is filled with organic plugging materials, the periphery of a cable in the cable trench is densely plugged by the organic plugging materials, and other parts of the cable trench are filled with fireproof bags;
s2-3-4: the top of the fire wall is filled with organic blocking material and covered with fire-proof partition board.
Through above-mentioned technical scheme, the setting of back-fire relief wall is separated the cable, when certain section cable was on fire, can prevent that the intensity of a fire from spreading between the back-fire relief wall with the intensity of a fire control.
The invention is further configured to: the construction of the anti-collision fence in the step S3 comprises the following steps:
s3-1: concrete is poured on the ground to form a C20 upright post buttress, a plurality of upright posts are fixedly connected to the C20 upright post buttress, the upper end surfaces of the upright posts are welded through cross bars, and the upright posts and the cross bars are made of hot galvanizing materials;
s3-2: when the upright columns are connected, the upright columns are hinged with a door body, and the upright columns and the cross rods of the door body are connected through right-angle elbows;
s3-3: the upright post is a hollow upright post, and the top surface of the upright post is sealed by a steel plate;
s3-4: the upright posts and the cross bars are coated with red and white alternate colors.
Through above-mentioned technical scheme, the stand buttress set up the area of being connected of increase stand and ground for the stand is more firm with ground connection. The hollow upright post saves more materials, seals the upper end of the upright post, and prevents sundries such as rainwater from entering the interior of the upright post.
In conclusion, the invention has the following beneficial effects:
1. the base is higher than the ground in the pressing top, so that rainwater on the ground is prevented from entering the box-type substation, and small animals are prevented from entering the box-type substation to damage an internal circuit;
2. the incoming line fireproof blocking device at the bottom end of the box-type substation can prevent a cable outside the box-type substation from causing fire due to short circuit and the like, and prevent the fire from spreading into the box-type substation to damage internal parts;
3. the cable trench through-wall hole fireproof plugging and the arrangement of the outdoor cable fire-retardant wall separate the cable, when a certain section of cable is on fire, the fire behavior can be controlled between the fire-retardant walls, and the fire behavior is prevented from spreading;
4. the setting of anticollision fence keeps apart box-type substation and external world, prevents on the one hand that there is personnel to get into that box-type substation is peripheral to cause destruction to box-type substation, and on the other hand also reduces personnel and gets into the regional dangerous possibility that takes place of box-type substation.
Drawings
Fig. 1 is a construction flow of the present embodiment in which a box-type substation is embodied;
FIG. 2 is a schematic diagram showing step S1 in the present embodiment;
FIG. 3 is a schematic diagram showing step S2-1 in the present embodiment;
FIG. 4 is a schematic diagram showing the location of the intumescent fire sealant in step S2-1;
FIG. 5 is a schematic diagram showing step S2-2 in the present embodiment;
FIG. 6 is a schematic diagram showing step S2-3 in the present embodiment;
FIG. 7 is a schematic diagram illustrating the position of the organic plug in the step S2-3 in the present embodiment;
FIG. 8 is a schematic view showing the position of the fire barrier in the step S2-3;
fig. 9 is a schematic diagram showing step S3 in the present embodiment;
FIG. 10 is a schematic view showing the pillar buttress in step S3 in the present embodiment;
fig. 11 is a schematic view of the door body in the embodiment, which shows step S3;
fig. 12 is a schematic view of the quarter bend in step S3 in this embodiment.
Reference numerals: 1. a foundation; 11. a cushion layer; 12. masonry; 13. Pressing; 14. channel steel; 2. an anti-collision fence; 21. a column; 22. a cross bar; 23. upright post buttress; 24. a door body; 25. a right-angle elbow; 3. a working well; 31. a ring beam; 4. a cover plate; 5. a water collection port; 6. Reinforcing steel bars; 7. a fire blocking device; 71. a fire retardant coating; 72. a fire-proof plate; 73. organic blocking; 74. a fire-proof bag; 75. an intumescent fire-retardant sealant; 76. a brick concrete body; 761. a drainage hole; 77. a fire barrier; 8. a cable; 9. a box-type substation; 91. and a cable hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that, as used in the following description, the terms "front," "rear," "left," "right," "upper," "lower," "bottom" and "top" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example (b): a method of installing a box substation, as shown in fig. 1, includes the steps of:
s1, constructing a box transformer substation foundation, wherein the box transformer substation foundation adopts a bare concrete foundation 1, and the upper end surface of the foundation 1 is higher than the ground (shown in a combined figure 2);
s2, laying the cable 8 and constructing the fireproof blocking device 7: arranging a cable trench, laying a cable 8, arranging a fireproof plugging device 7 (in combination with figure 2) at the bottom of the box transformer substation, and arranging the fireproof plugging device 7 (in combination with figures 5 and 6) in the process of laying the cable 8 to electric equipment;
and S3, constructing the anti-collision fence 2, and arranging the anti-collision fence 2 at a position 1-2m away from the box-type substation 9 (with reference to the figure 9).
When the upper end face of the box type transformer substation foundation 1 is higher than the ground, so that the box type transformer substation 9 is placed on the foundation 1, on one hand, rainwater on the ground can be prevented from entering the box type transformer substation 9, and on the other hand, small animals are prevented from entering the box type transformer substation 9 to cause damage to internal electrical components. The setting of fire prevention plugging device 7 can reduce the cable 8 and spread when catching fire the intensity of a fire, prevents to form great fire incident, causes bigger damage and causes the personal danger to equipment, and the setting of anticollision fence 2 keeps apart box-type substation 9 with the external world, prevents that unrelated personnel from getting into, reduces the artificial probability of damaging to box-type substation 9 on the one hand, and on the other hand also can prevent that the intensity of a fire from spreading and causing the casualties when box-type substation 9 catches fire.
In step S1, the construction of the box-type substation foundation 1 includes the following steps:
s1-1: excavating a box transformer foundation pit, mechanically excavating to a bearing stratum, manually cleaning the bottom of the rest part until the bottom of the embedded flat steel is excavated, and removing sundries such as garbage, soil and the like on foundation soil;
s1-2: lightning protection grounding, wherein a cable 8 is embedded, a lightning arrester is arranged on the cable 8, and the grounding end of the lightning arrester is connected with the sheath of the cable 8 and reliably connected with a grounding device of electrical equipment; the grounding device mainly comprises a horizontal grounding body and an auxiliary vertical grounding body, the horizontal grounding body is made of hot-dip galvanized round steel, and the vertical grounding electrode is made of hot-dip galvanized angle steel or steel pipe;
s1-3: as shown in fig. 2, the cushion 11 is constructed, the concrete cushion 11 is poured and tamped, the C15 concrete cushion 11 is adopted, after the strength of the cushion 11 meets the design requirement, the steel bars 6 are bound, the cushion 11 is vibrated by a flat vibrator in the pouring process, the flatness of the surface of the cushion 11 is ensured, the surface of the cushion 11 after pouring is smooth and is provided with a water collecting well, the water collecting well is filled with a medium coarse sand layer, the water in the foundation 1 is discharged by the water collecting port 5, the water in the foundation 1 can rapidly permeate through the medium coarse sand by the medium coarse sand, the working well 3 is further arranged beside the foundation 1, and the upper end face of the working well 3 is provided with a cover plate 4 through a girt 31. The setting of working well 3 makes things convenient for the staff to operate. Furthermore, a plurality of water flowing grooves are arranged in the cover plate 4 in the vertical direction, so that workers can work through the cover plate 4, water on the ground flows into the water collecting well 5 through the cover plate 4, and water flowing to the box-type substation 9 on the ground is discharged;
s1-4: pouring concrete, pouring C25 plain concrete masonry 12 around the cushion layer 11, pouring C25 concrete on the masonry 12 to form a concrete coping 13, arranging a steel bar 6 in the coping 13, placing the box-type substation 9 at the upper end of the coping 13, and enabling the upper end face of the coping 13 to be higher than the ground. The upper end face of the pressing top 13 is higher than the ground, so that when the box-type substation 9 is placed on the pressing top 13, rainwater on the ground can be prevented from entering the box-type substation 9 on the one hand, and on the other hand, small animals are prevented from entering the box-type substation 9 to cause damage to internal electrical components.
The coping 13 and the box-type substation 9 can be fixedly connected through a prefabricated part, and can also be connected in a mode of connecting bolts and connecting nuts, when the coping 13 and the box-type substation 9 are connected through the prefabricated part, the prefabricated part is an embedded channel steel 14, when a foundation is poured, the embedded channel steel 14 is welded in the coping 13, and the channel steel 14 is welded with the box-type substation 9; when the coping 13 is connected with the box-type substation 9 in a connection bolt and connection nut mode, an expansion bolt is pre-buried in the coping 13, then the box-type substation 9 is connected with the expansion bolt, and then the box-type substation is fixed in the connection nut mode. Because the embedding and welding operation of the channel steel 14 is convenient, and the bearing capacity of the channel steel 14 is higher due to the welding connection mode of the channel steel 14, the top pressing 13 is preferably connected with the box-type substation in the embedded channel steel 14 mode, the channel steel 14 is hot galvanized channel steel 14, and after welding, heavy asphalt is sprayed for surface protection, so that the corrosion resistance of the channel steel 14 is improved.
After the step S1, the box-type substation 9 is placed on the foundation 1 in the step S1 by hoisting, and then the box-type substation 9 is welded to the channel steel 14.
In the step S2, the construction of the fireproof blocking device 7 comprises construction S2-1 (combined with figure 2) of the fireproof blocking device 7 of the incoming line at the bottom end of the box-type substation 9, construction S2-2 of fireproof blocking of a wall through hole of a cable trench and construction S2-3 of a fire wall of an outdoor cable 8. 9 bottom inlet wire fire prevention plugging device 7 of box-type substation can prevent that cable 8 outside the box-type substation 9 from causing the conflagration because of reasons such as short circuit, prevent that the intensity of a fire from spreading to causing the damage to inside spare part in the box-type substation 9, the setting of wall hole fire prevention plugging and 8 back-fire dams of outdoor cable is worn to the cable pit separates cable 8, when a certain section cable 8 is on fire, can control the intensity of a fire between the back-fire dams, prevents that the intensity of a fire from spreading.
Step S2-1, constructing the fireproof plugging device 7 at the bottom end incoming line of the box-type substation 9, as shown in fig. 2 and fig. 3, arranging a cable hole for a cable 8 to pass through at the bottom of the box-type substation 9, fixing a fireproof plate 72 at the bottom of the box-type substation 9 through angle steel, and sealing edges at a gap between the fireproof plate 72 and the box-type substation 9 through elastic fireproof sealing glue.
As shown in fig. 3, the space between the fire-proof plate 72 and the cable 8 may be filled with an organic blocking material 73, or may be filled with an intumescent fire-proof sealant 75 (see fig. 4), because the cooperation between the fire-proof plate 72 and the fire-proof sealant has good air tightness and smoke tightness while ensuring the fire-proof blocking effect of the fire-proof plate 72, it is preferable that the space between the fire-proof plate 72 and the cable 8 is filled with the intumescent fire-proof sealant 75.
Step S2-2, construction of fireproof blocking of the through-wall hole of the cable trench, as shown in FIG. 5, fixedly connecting fireproof plates 72 on two sides of the wall, coating fireproof paint 71 on cables 8 outside the fireproof plates 72, filling organic blocking materials 73 around the cables 8 in the cable trench, and filling fireproof bags 74 in the rest parts of the cable hole; the seams between the fireproof plate 72 and the wall are sealed by elastic fireproof sealing glue. The fire is prevented from spreading by the provision of the fire shield 72 and the fire bag 74.
And S2-3, constructing fire retardant walls of the outdoor cables 8, wherein the fire retardant walls of the outdoor cables 8 are arranged every 60-100m, the cables 8 are separated by the fire retardant walls, and when a certain section of cable 8 is on fire, the fire can be controlled between the fire retardant walls, so that the fire can be prevented from spreading. As shown in fig. 6, the fireproof plate 72 is fixed on two sides of the wall body through the angle steel and the expansion bolts which are subjected to rust-proof and fireproof treatment, and with reference to fig. 7 and 8, the bottom of the cable trench is filled with the organic blocking material 73, the periphery of the cable 8 in the cable trench is tightly blocked by the organic blocking material 73, and the other parts of the cable trench are filled with the fireproof bag 74. Compared with the construction of fireproof plugging of a wall through hole of a cable trench, the fireproof plugging device is characterized in that a brick concrete body 76 built by bricks is arranged at the bottom end of the cable trench, a drainage hole 761 is formed in the brick concrete body 76 in a penetrating mode, a fireproof plate 72 is arranged on the upper end face of the brick concrete body 76, a cable 8 outside the fireproof plate 72 is coated with fireproof paint 71, the top of the fireproof wall is filled with organic plugging materials 73 to be flat, and a fireproof partition plate 77 is covered on the top of the fireproof wall.
In the step S3, the anti-collision fence 2 is constructed, as shown in fig. 9, concrete is poured on the ground to form a C20 upright post buttress 23, and referring to fig. 10, a plurality of upright posts 21 are fixedly connected to the C20 upright post buttress 23, the upper end surfaces of the upright posts 21 are welded by cross bars 22, and the upright posts 21 and the cross bars 22 are made of hot galvanizing materials. The arrangement of the upright buttress 23 increases the connection area of the upright 21 and the ground, so that the connection between the upright 21 and the ground is firmer.
Referring to fig. 11, when the pillar 21 is connected, the pillar 21 is hinged to the door 24, and the pillar 21 and the rail 22 of the door 24 are connected by a quarter bend 25 (referring to fig. 12). The upright post 21 is a hollow upright post 21, and the top surface of the upright post 21 is sealed by a steel plate. The posts 21 and the cross-bar 22 are coloured red and white. The hollow upright post 21 saves more materials, the upper end of the upright post 21 is sealed, and sundries such as rainwater are prevented from entering the inside of the upright post 21.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A construction method of a box-type transformer substation is characterized by comprising the following steps: the construction method comprises the following steps:
s1, constructing a box transformer substation foundation (1), wherein the box transformer substation foundation (1) adopts a clear water concrete foundation (1), and the upper end face of the foundation (1) is higher than the ground;
s2, laying a cable (8), constructing a fireproof plugging device (7), arranging a cable trench, laying the cable (8), arranging the fireproof plugging device (7) at the bottom of the box transformer substation, and arranging the fireproof plugging device (7) in the process that the cable (8) is laid to the electric equipment;
s3, constructing the anti-collision fence (2), and arranging the anti-collision fence (2) at a position 1-2m away from the box-type substation (9).
2. The construction method of a box-type substation according to claim 1, characterized in that: in step S1, the construction of the box-type substation foundation (1) includes the steps of:
s1-1: excavating a box transformer foundation pit, mechanically excavating to a bearing stratum, manually cleaning the bottom of the rest part until the bottom of the embedded flat steel is excavated, and removing sundries such as garbage, soil and the like on foundation soil;
s1-2: lightning protection grounding, wherein a cable (8) is embedded, a lightning arrester is arranged on the cable (8), and the grounding end of the lightning arrester is connected with the sheath of the cable (8) and reliably connected with a grounding device of electrical equipment; the grounding device mainly comprises a horizontal grounding body and an auxiliary vertical grounding body, the horizontal grounding body is made of hot-dip galvanized round steel, and the vertical grounding electrode is made of hot-dip galvanized angle steel or steel pipe;
s1-3: constructing a cushion layer (11), pouring and tamping the concrete cushion layer (11), adopting a C15 concrete cushion layer (11), binding reinforcing steel bars (6) after the strength of the cushion layer (11) meets the design requirement, vibrating by using a flat vibrator in the pouring process to ensure the flatness of the surface of the cushion layer (11), collecting light on the surface of the poured cushion layer (11) and arranging a water collecting well, wherein a medium coarse sand layer is filled in the water collecting well;
s1-4: pouring concrete, pouring the periphery of the cushion layer (11) to form a C25 plain concrete masonry (12), pouring C25 concrete on the masonry (12) to form a concrete coping (13), arranging a steel bar (6) in the coping (13), placing a box-type substation (9) at the upper end of the coping (13), and enabling the upper end face of the coping (13) to be higher than the ground.
3. The construction method of a box-type substation according to claim 2, characterized in that: and S1-4, welding an embedded channel steel (14) in the coping (13), wherein the channel steel (14) is welded with the box-type substation (9), and the upper end face of the channel steel (14) is higher than the upper end face of the foundation (1).
4. The construction method of a box-type substation according to claim 2, characterized in that: and step S1-4, embedding expansion bolts in the pressure top (13), and fixedly connecting the box-type substation (9) with the connecting nuts through the expansion bolts.
5. The construction method of a box-type substation according to claim 1, characterized in that: in the step S2, the construction of the fireproof blocking device (7) comprises construction S2-1 of the fireproof blocking device (7) of the bottom wire inlet of the box-type substation (9), construction S2-2 of fireproof blocking of the through-wall hole of the cable trench and construction S2-3 of a fire wall of the outdoor cable (8).
6. The construction method of a box-type substation according to claim 5, characterized in that: s2-1 construction of the fireproof plugging device (7) for the incoming line at the bottom end of the box-type substation (9) comprises the following steps:
s2-1-1: a cable hole (91) for a cable (8) to pass through is formed in the bottom of the box-type substation (9), and a fireproof plate (72) is fixed at the bottom of the box-type substation (9) through angle steel;
s2-1-2: fireproof paint (71) is coated on the cables (8) on two sides of the cable hole (91), organic blocking materials (73) are filled around the cables (8) in the cable hole (91), and fireproof bags (74) are filled in the rest part of the cable hole (91);
s2-1-3: the seams between the fireproof plate (72) and the box-type substation (9) are sealed by elastic fireproof sealing glue, and expansion type fireproof sealing glue (75) is adopted between the fireproof plate (72) and the cable (8).
7. The construction method of a box-type substation according to claim 5, characterized in that: step S2-2 construction of cable trench through-wall hole fire prevention shutoff includes the following steps:
s2-2-1: the fireproof plates (72) are fixedly connected to two sides of the wall body, fireproof paint (71) is coated on cables (8) on the outer sides of the fireproof plates (72), organic blocking materials (73) are filled around the cables (8) in the cable trench, and fireproof bags (74) are filled in the rest parts of the cable holes (91);
s2-2-2: the seams between the fireproof plate (72) and the wall body are sealed by elastic fireproof sealing glue.
8. The construction method of a box-type substation according to claim 5, characterized in that: the fire retardant walls of the outdoor cables (8) are arranged at intervals of 60-100m, and the step S2-3 of constructing the fire retardant walls of the outdoor cables (8) comprises the following steps:
s2-3-1: the fireproof plates (72) are fixed on two sides of the wall body through angle steel and expansion bolts which are subjected to rust-proof and fireproof treatment;
s2-3-2: the cable trench is characterized in that a brick concrete body (76) is built at the bottom end of the cable trench by bricks, a drainage hole (761) is formed in the brick concrete body (76) in a penetrating mode, a fireproof plate (72) is arranged on the upper end face of the brick concrete body (76), and a cable (8) on the outer side of the fireproof plate (72) is coated with fireproof paint (71);
s2-3-3: the bottom of the cable trench is filled with organic blocking materials (73), the periphery of a cable (8) in the cable trench is densely blocked by the organic blocking materials (73), and other parts of the cable trench are filled with fireproof bags (74);
s2-3-4: the top of the fire wall is filled and leveled by organic blocking material (73), and a fire partition plate (77) is covered.
9. The construction method of a box-type substation according to claim 1, characterized in that: the construction of the anti-collision fence (2) in the step S3 comprises the following steps:
s3-1: concrete is poured on the ground to form C20 upright post buttresses (23), a plurality of upright posts (21) are fixedly connected to the C20 upright post buttresses (23), the upper end surfaces of the upright posts (21) are welded through cross rods (22), and the upright posts (21) and the cross rods (22) are made of hot galvanizing materials;
s3-2: when the upright post (21) is connected, the upright post (21) is hinged with a door body (24), and the upright post (21) and the cross rod (22) of the door body (24) are connected through a right-angle elbow (25);
s3-3: the upright post (21) is a hollow upright post (21), and the top surface of the upright post (21) is sealed by a steel plate;
s3-4: the upright posts (21) and the cross bars (22) are coated with red and white alternate colors.
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| CN201810975010.5A CN110858705A (en) | 2018-08-24 | 2018-08-24 | Construction method of box-type substation |
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| CN201810975010.5A CN110858705A (en) | 2018-08-24 | 2018-08-24 | Construction method of box-type substation |
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Application publication date: 20200303 |