CN213100564U - Main transformer water spray fire extinguishing system - Google Patents
Main transformer water spray fire extinguishing system Download PDFInfo
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- CN213100564U CN213100564U CN202021694539.9U CN202021694539U CN213100564U CN 213100564 U CN213100564 U CN 213100564U CN 202021694539 U CN202021694539 U CN 202021694539U CN 213100564 U CN213100564 U CN 213100564U
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Abstract
The utility model discloses a main transformer water spray fire extinguishing system, which comprises a plurality of water spray nozzles; the envelope lines of the plurality of water spray nozzles completely cover the long side face, the short side face, the oil conservator, the lifting seat orifice of the insulating sleeve, the radiator, the top face of the main transformer body and the ignition face of the oil pit to form a lower horizontal nozzle ring network, an upper horizontal nozzle ring network, a side top face nozzle group ring network, a top face nozzle group ring network and a lifting seat orifice nozzle group which are independent and mutually connected, wherein each long side face, each short side face and the top face correspond to each long side face, and each short side face and each top face are arranged in a rectangular array. The utility model discloses well water spray nozzle's envelope covers the insulating sleeve of the top surface of main transformer body, side, radiator completely and rises a drill way to and the face of catching fire in oil pit, make this water spray fire extinguishing systems reach the fire extinguishing and protection refrigerated protection purpose of standard requirement.
Description
Technical Field
The utility model relates to a transformer fire control technical field, in particular to main transformer water spray fire extinguishing systems.
Background
In the prior art, the arrangement habit of the water mist spray heads is to protect the fire surface of a long-side face, a short-side face, an oil conservator, an orifice of an insulating sleeve lifting seat, a radiator and an oil pit of a main transformer, but the volume of the main transformer is increased due to the rise of an ultrahigh voltage plant and an ultrahigh voltage power plant.
The transformer body cannot be completely protected by continuously adopting the conventional arrangement, so that part of the top surface of the transformer is exposed, and the part of the top surface of the transformer cannot be timely rescued in case of fire.
Therefore, there is a need for improvements in existing water-mist fire suppression systems that overcome the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a main transformer water spray fire extinguishing systems, the purpose of realization is that the envelope that makes the water spray nozzle covers the insulating sleeve of the top surface of main transformer body, side, radiator completely and rises a drill way to and the face of catching fire of oil pit, eliminates the potential safety hazard.
In order to achieve the purpose, the utility model discloses a main transformer water spray fire extinguishing system, which comprises a plurality of water spray nozzles.
The envelope lines of the plurality of water spray nozzles completely cover the long side surface, the short side surface, the oil conservator, the lifting seat orifice of the insulating sleeve, the radiator, the top surface of the main transformer body and the firing surface of the oil pit, and a lower horizontal nozzle ring network, an upper horizontal nozzle ring network, a side top surface nozzle group ring network, a top surface nozzle group ring network and a lifting seat orifice nozzle group which are independent and mutually connected are formed.
The lower horizontal spray head ring network, the upper horizontal spray head ring network, the side top surface spray head group ring network, the top surface spray head group ring network and a plurality of spray heads of the lifting seat orifice spray head group are arranged in a rectangular array corresponding to each long side surface, each short side surface and the top surface corresponding to the main transformer;
the plurality of water mist spray heads of the lower horizontal spray head ring network respectively protect the oil pit, the lower part of the long side surface and the lower part of the short side surface;
the plurality of water mist spray heads of the upper horizontal spray head ring network respectively protect the upper part of the long side surface and the upper part of the short side surface;
the side top surfaces of the main transformer are protected by a plurality of water mist spray heads of the side top surface spray head group ring network;
the water mist nozzles of the top surface nozzle group protect the top surface of the main transformer;
and a plurality of water mist nozzles of the lifting seat nozzle group protect the orifices of the lifting seat of the insulating sleeve.
Preferably, the surface area of the conservator is 12.97m2；
The number of the water mist nozzles for protecting the oil conservator of the main transformer is 5, and ZSTTB 34/120 type water mist nozzles are adopted; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
Preferably, the area of the long side surface is 77.89m2The area of the short side face is 67.87m2；
60 water mist spray heads protecting the long side surface and the short side surface of the main transformer are arranged; adopting a ZSTW B34/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
Preferably, the top surface has an area of 49.20m2；
26 water mist nozzles for protecting the top surface; adopting a ZSTW B43/90 type water mist spray head; the flow coefficient K of each water spray nozzle is 43, and the atomization angle is 120 degrees.
Preferably, the area of the oil pit is 115.50m2；
18 water mist nozzles for protecting the oil pit; adopting a ZSTW B16/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 120 degrees.
Preferably, the number of the water mist nozzles for protecting the orifices of the insulating sleeve lifting seat is 5; adopting a ZSTW B16/90 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 90 degrees.
Preferably, 2 90-degree elbows are arranged between each water mist spray head and the corresponding pipeline.
Preferably, the minimum safe clear distance between each water mist spray head and the corresponding pipeline and the electrified part of the main transformer is more than 3.8 m.
The utility model has the advantages that:
the utility model discloses well water spray nozzle's envelope covers the insulating sleeve of the top surface of main transformer body, side, radiator completely and rises a drill way to and the face of catching fire in oil pit, make this water spray fire extinguishing systems reach the fire extinguishing and protection refrigerated protection purpose of standard requirement.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 2 shows a schematic diagram of an envelope of a water mist head according to an embodiment of the present invention.
Fig. 3 shows a schematic side view of an embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 1 to 3, the main transformer water spray fire extinguishing system comprises a plurality of water spray nozzles.
The envelope lines of the plurality of water spray nozzles completely cover the long side surface 5, the short side surface 6, the oil conservator 1, the insulating sleeve lifting seat orifice 2, the radiator 3, the top surface of the main transformer body and the firing surface of the oil pit 4 of the main transformer, and a lower horizontal nozzle ring network, an upper horizontal nozzle ring network, a side top surface nozzle group ring network, a top surface nozzle group ring network and a lifting seat orifice nozzle group which are independent and mutually connected are formed.
The lower horizontal spray head ring network, the upper horizontal spray head ring network, the side top surface spray head group ring network, the top surface spray head group ring network and a plurality of spray heads of the lifting seat orifice spray head group are arranged in a rectangular array corresponding to each long side surface, each short side surface and the top surface corresponding to the main transformer;
a plurality of water mist spray heads of the lower horizontal spray head ring network respectively protect the oil pit 4, the lower part of the long side surface 5 and the lower part of the short side surface 6;
a plurality of water mist spray heads of the upper horizontal spray head ring network respectively protect the upper part of the long side surface 5 and the upper part of the short side surface 6;
the side top surfaces of the main transformer are protected by a plurality of water mist spray heads of the side top surface spray head group ring network;
the water mist nozzles of the top surface nozzle group protect the top surface 7 of the main transformer;
several water mist nozzles of the elevated seat orifice nozzle group protect the insulated bushing elevated seat orifice 2.
The principle of the utility model is as follows:
on the basis of the original water mist spray heads, a row of water mist spray heads are independently arranged on the top surface of the transformer body, and the envelope curve of the water mist spray heads is required to completely cover the top surface part of the main transformer body;
in practical application, the arrangement of the water mist spray heads meets the following requirements:
1. the oil conservator 1, the orifice 2 of the lifting seat of the main transformer insulating sleeve, the radiator 3 and the oil pit 4 are protected by a water mist spray head;
2. the horizontal distance and the vertical distance between the water mist nozzles meet the requirement of intersection of the water mist cones.
The main transformer side surface is divided into a long side surface 5 and a short side surface 6 for calculation, and the area S1 of the main transformer long side surface 5 is 77.89m2The area S2 of the short side surface 6 of the main transformer is 67.87m2The area S3 of the top surface 7 is 49.20m2The surface area S4 of the conservator 1 is 12.97m2The area S5 of oil sump 4 is 115.50m2。
Therefore, the main transformer body protection area S6 ═ S1+ S2+ S3+ S4 ═ 207.93m2The protection area S7 of the main transformer oil sump 4 is S5-S3 is 66.30m2。
Estimation of water mist spray head flow and determination of spray head quantity
The flow formula of the water mist spray head is as follows:
q is the actual flow of the water spray nozzle, L/min;
p is the actual working pressure of the water mist spray head, MPa;
k is the flow coefficient of the water spray nozzle, and the value is provided by a manufacturer.
The flow of the water mist spray heads is calculated according to the formula 1, and the water mist spray heads are arranged once. Because the working pressure of the water spray nozzle for fire extinguishing is not less than 0.35MPa, and the water head loss exists in the pipeline, the requirement is met
The working pressure of the worst water mist spray head and the working pressure of the rest water mist spray heads are all larger than the working pressure of the worst water mist spray head. In order to estimate the number of the required heads, the head pressure P is estimated as 0.35MPa, which is the operating pressure of the most unfavorable head. The value of K is related to the selected sprinkler model.
Because the water mist spray heads are vertically arranged around the main transformer, the spray heads horizontally spray water mist when in action, the water mist has downward speed vertically due to the action of gravity, and the spray curves of the water mist spray heads form a parabola, so the distance between the water mist spray heads cannot be simply calculated according to a calculation formula R which is B tan (theta/2) when the water mist spray heads are arranged on a plane (wherein R is the radius of a water mist cone bottom circle, B is the distance between a spray opening of the water mist spray head and a protected object, and theta is the atomization angle of the water mist spray head), the water mist spray heads are arranged according to vertical and horizontal spray curves of various types of water mist spray heads provided by manufacturers, and the horizontal distance and the vertical distance between the spray heads meet the requirement that the water mist cones are intersected to form an envelope surface.
In certain embodiments, the surface area of the conservator 1 is 12.97m2；
5 water mist nozzles for protecting an oil conservator 1 of the main transformer are all ZSTW B34/120 type water mist nozzles; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
In some embodiments, the long side surface 5 has an area of 77.89m2The area of the short side surface 6 is 67.87m2；
60 water mist nozzles for protecting the long side surface 5 and the short side surface 6 of the main transformer are arranged; adopting a ZSTW B34/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
In some embodiments, the top surface 7 has an area of 49.20m2；
26 water mist nozzles for protecting the top surface 7; adopting a ZSTW B43/90 type water mist spray head; the flow coefficient K of each spray head is 43, and the atomization angle is 120 degrees.
In certain embodiments, the oil sump 4 has an area of 115.50m2；
18 water mist nozzles for protecting the oil pit 4; adopting a ZSTW B16/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 120 degrees.
In some embodiments, 5 water mist heads protecting the bushing riser socket orifice 2; adopting a ZSTW B16/90 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 90 degrees.
In some embodiments, 2 90 ° bends are provided between each mist head and the corresponding conduit.
The structure can facilitate the adjustment of the spraying angle of the water mist spray head.
In certain embodiments, each mist head and corresponding conduit is spaced apart from the live portion of the main transformer by a minimum safe clearance distance of greater than 3.8 m.
The pipeline adopts inner and outer hot galvanized steel pipes, the diameter is more than or equal to DN50, the pipes are connected by a clamp, and the diameter is less than DN50, and the pipes are connected by screw threads.
The pipeline bracket can be used according to the conventional method, particularly, the pipeline bracket of the top spray nozzle pipeline is welded on the main transformer body, and the pipeline bracket of the conservator spray nozzle pipeline is welded on the top surface of the conservator.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. The main transformer water spray fire extinguishing system comprises a plurality of water spray nozzles; the method is characterized in that: the envelope lines of the plurality of water spray nozzles completely cover the long side surface (5), the short side surface (6), the oil conservator (1), the insulating sleeve lifting seat orifice (2), the radiator (3), the top surface of the main transformer body and the firing surface of the oil pit (4) to form a lower horizontal nozzle ring network, an upper horizontal nozzle ring network, a side top nozzle group ring network, a top nozzle group ring network and a lifting seat orifice nozzle group which are independent and mutually connected;
the lower horizontal spray head ring network, the upper horizontal spray head ring network, the side top surface spray head group ring network, the top surface spray head group ring network and a plurality of spray heads of the lifting seat orifice spray head group are arranged in a rectangular array corresponding to each long side surface, each short side surface and the top surface corresponding to the main transformer;
the plurality of water mist spray heads of the lower horizontal spray head ring network respectively protect the oil pit (4), the lower part of the long side surface (5) and the lower part of the short side surface (6);
the plurality of water mist spray heads of the upper horizontal spray head ring network respectively protect the upper part of the long side surface (5) and the upper part of the short side surface (6);
the side top surfaces of the main transformer are protected by a plurality of water mist spray heads of the side top surface spray head group ring network;
the water mist nozzles of the top surface nozzle group protect the top surface (7) of the main transformer;
and a plurality of water mist spray heads of the lifting seat orifice spray head group protect insulating sleeve lifting seat orifices (2).
2. The main transformer water spray of claim 1Fire extinguishing system, characterized in that the surface area of the conservator (1) is 12.97m2；
5 water mist spray heads protecting the oil conservator (1) of the main transformer are all ZSTW B34/120 type water mist spray heads; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
3. A main transformer water spray fire suppression system according to claim 1, wherein the area of said long side face (5) is 77.89m2The area of the short side surface (6) is 67.87m2；
60 water mist spray heads protecting the long side surface (5) and the short side surface (6) of the main transformer are arranged; adopting a ZSTW B34/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 34, and the atomization angle is 120 degrees.
4. A main transformer water spray fire suppression system according to claim 1, characterized in that the top surface (7) has an area of 49.20m2；
26 water mist spray heads protecting the top surface (7); adopting a ZSTW B43/90 type water mist spray head; the flow coefficient K of each water spray nozzle is 43, and the atomization angle is 120 degrees.
5. A main transformer water spray fire suppression system according to claim 1, wherein the oil sump (4) has an area of 115.50m2；
18 water mist spray heads for protecting the oil pit (4); adopting a ZSTW B16/120 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 120 degrees.
6. A main transformer water spray fire suppression system according to claim 1, wherein said water spray nozzles protecting the insulated bushing riser orifice (2) are 5; adopting a ZSTW B16/90 type water mist spray head; the flow coefficient K of each water spray nozzle is 16, and the atomization angle is 90 degrees.
7. A main transformer water spray fire suppression system as claimed in claim 1, wherein 2 90 ° bends are provided between each said water spray nozzle and the respective pipeline.
8. A main transformer water spray fire suppression system as recited in claim 1, wherein each said water spray nozzle and corresponding conduit has a minimum safe clearance from an electrified portion of said main transformer of greater than 3.8 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021694539.9U CN213100564U (en) | 2020-08-14 | 2020-08-14 | Main transformer water spray fire extinguishing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021694539.9U CN213100564U (en) | 2020-08-14 | 2020-08-14 | Main transformer water spray fire extinguishing system |
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| CN213100564U true CN213100564U (en) | 2021-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115212493A (en) * | 2022-05-13 | 2022-10-21 | 国网安徽省电力有限公司电力科学研究院 | Novel fire extinguishing system and method suitable for oil-immersed transformer |
| CN115624703A (en) * | 2022-10-27 | 2023-01-20 | 国网经济技术研究院有限公司 | Water spray fire extinguishing system and control method |
-
2020
- 2020-08-14 CN CN202021694539.9U patent/CN213100564U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115212493A (en) * | 2022-05-13 | 2022-10-21 | 国网安徽省电力有限公司电力科学研究院 | Novel fire extinguishing system and method suitable for oil-immersed transformer |
| CN115624703A (en) * | 2022-10-27 | 2023-01-20 | 国网经济技术研究院有限公司 | Water spray fire extinguishing system and control method |
| CN115624703B (en) * | 2022-10-27 | 2023-03-21 | 国网经济技术研究院有限公司 | Water spray fire extinguishing system and control method |
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