CN111686386A - Arrangement structure of compressed air foam fire extinguishing system of extra-high voltage converter transformer - Google Patents

Abstract

The invention relates to a compressed air foam fire extinguishing system of an extra-high voltage converter transformer, which comprises N groups of converter transformers in a converter transformer wide field, wherein each group of converter transformers is provided with a plurality of converter transformer units, and the compressed air foam fire extinguishing system also comprises a fixed spraying system, a fire monitor fire extinguishing system and a fire hydrant system which all adopt compressed air foam solution, wherein the fixed foam system comprises a spraying release pipe arranged in each converter transformer unit and arranged at the outer side of the converter transformer. The fire gun system contains plural fire gun, it is located the change of current and becomes valve room side cornice or change of current and become on the fire gun tower in square, the fire hydrant system contains the fire hydrant of setting in change of current and become the square, spray the release pipe, the fire gun, the fire hydrant is all connected in compressed air foam production device, adopt compressed air foam fire extinguishing systems to combine fixed spraying, fire gun and fire hydrant system, it is high to utilize the compressed air foam to have foam stability, the coverage is good, impact momentum is strong, advantage such as the water consumption is little, promote fire extinguishing efficiency.

Description

Layout structure of UHV commutated compressed air foam fire extinguishing system

technical field

The invention relates to an arrangement structure of a fire extinguishing system applied to an ultra-high voltage converter transformer, in particular to a fixed fire fighting method realized by using compressed air foam.

Background technique

The converter transformer of the UHV converter station (hereinafter referred to as the converter transformer) is a large oil-immersed equipment in the station. The oil content of the single-phase equipment is about 100t~151t, and the fire danger is high. Put out possible equipment fires. At present, the fixed fire fighting of large-scale oil-immersed equipment in China mainly adopts water spray fire extinguishing system and foam spray fire extinguishing system. The water spray fire extinguishing system consumes a lot of water. In areas with abundant water resources, water spray fire extinguishing systems are generally used for fixed fire fighting of large oil-immersed equipment, and foam spray fire extinguishing systems are generally used in areas where water resources are lacking.

The traditional water spray fire extinguishing system sprays water mist through the water mist nozzles 21 arranged around the converter, and does not contain other fire extinguishing agents except water. Ideally, each nozzle as shown in FIG. 1A to FIG. 1C has a spray range 22 of water mist, which forms a complete range for the converter oil tank 11 , the radiator 12 , the oil conservator, the bushing 14 and its oil pool 17 . The azimuth three-dimensional package, isolates the air, and achieves the purpose of extinguishing the fire through the principle of suffocation. The disadvantages are: 1) The fire extinguishing efficiency is low. Due to the large surface tension of water, it is not easy to combine with other substance molecules or be absorbed, resulting in the effect of heat absorption and cooling; 2) The water spray fire extinguishing system is affected by the wind speed and direction when working The environmental impact is large, and its fire-extinguishing efficiency is insufficient in its ability to suppress fires; 3) The water spray fire-extinguishing system consumes a large amount of water for fire-fighting. Traditionally, water is used for fire-fighting. The water sprayed during fire-fighting has only 5 parts that can absorb heat. %~10%, that is, 90%~95% of the fire extinguishing water is wasted and lost, which is difficult to apply in areas with scarce water resources; 4) Since the distance between the water mist sprinkler and the transformer cannot exceed the effective range of the sprinkler, the sprinkler is arranged close to the transformer , When the transformer catches fire, it is easy to cause damage to the nozzle, fall off, the pipeline loses pressure, water mist cannot be formed, the air around the transformer cannot be isolated, and the fire cannot be effectively extinguished.

In the traditional foam spray fire extinguishing system, the foam mixture is formed by mixing or pre-mixing, and is transported to the foam nozzle around the converter through the pump group or nitrogen, and the nozzle forms air foam at the outlet. As shown in FIGS. 2A and 2B , the foam nozzles are generally arranged above the top surface of the converter, the casing root nozzles 32 are arranged at the bottom of the casing, and the oil conservator nozzles 33 are arranged on the top of the oil conservator 13 , and the above nozzles pass through the foam. The pipe 34 is connected to the foam main pipe 31 connected from the foam fire fighting room. When the foam liquid enters the nozzle, the caliber suddenly shrinks and the flow rate increases sharply, creating a certain degree of vacuum in the mixing chamber, so that air is sucked in and mixed with the foam liquid to generate air foam. Covering the top surface of the converter, the body, the oil storage tank 13 and the oil pool 17, etc., is formed by foam flowing, and the purpose of extinguishing the fire is achieved by isolating the air. But its disadvantages are: 1) The foam stability is not strong, which is mainly due to the uneven size of the foam and the wide size distribution of the bubbles in the foam, which makes the air easily pass through the bubble film and diffuse between the bubbles, making the small bubbles more Small and large bubbles become larger, while larger bubbles are less stable and difficult to adhere to the surface of the fuel for a long time, and the fire extinguishing efficiency is also affected; 2) The foam impulse generated by the vacuum aspirated foam fire extinguishing system is small , the momentum is not high, and it is easily affected by the high-temperature airflow near the injection port. This is mainly due to the fact that air is entrained when the foam is sprayed through the nozzle. The nozzle needs to rely on the turbulent action between the air and the foam solution, so that part of the energy of the foam is dissipated. . The limited adhesion ability on the surface of the protective material will affect the reliability of fire extinguishing and reduce the fire extinguishing efficiency; 3) When a converter fire occurs, it is often accompanied by a large amount of smoke, which affects the formation of foam and reduces the fire extinguishing effect.

The above two types of converter fire extinguishing systems mainly play the role of isolation and suffocation, and the response time is short.

In recent years, a number of transformer fire accidents have occurred, resulting in the loss of equipment and personnel, and the resulting power outage has a certain impact on the national economy. At the same time, it also reflects the limited fire-extinguishing capacity of the existing fixed fire-extinguishing system, which is difficult to quickly and effectively extinguish the fire. In view of the important position of the flow station in the power grid skeleton, it is necessary to upgrade the converter transformer of the UHV converter station for fire protection and explore more reliable and efficient fire protection methods.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to provide a fixed fire extinguishing system arrangement structure using compressed air foam as a medium.

The technical means adopted in the present invention are as follows.

An ultra-high pressure converter-transformed compressed air foam fire-extinguishing system layout structure, the converter-transformation square contains N groups of converter-transformers, each group of converter-transformers is arranged with a plurality of converter-transformation units, and also includes a compressed air foam solution. The fixed spray system, fire monitor fire-extinguishing system and fire hydrant system; the fixed foam system includes a spray release pipe arranged in each converter unit, and the spray release pipe is connected to the compressed air foam through the spray conveying pipe The generating device, the spray conveying pipe, is arranged on the outer side of the converter; the fire monitor system includes a plurality of fire monitors, the fire monitors are arranged on the overhanging side of the valve hall of the converter, and the fire monitors pass the fire The fire monitor conveying pipe is connected to the compressed air foam generating device, and the fire monitor conveying pipe is arranged on the side of the converter valve hall; or the fire monitor is arranged on the fire monitor tower of the converter square, and the fire monitor passes through the fire monitor conveying pipe. Connected to the compressed air foam generating device, the fire monitor conveying pipe is arranged on the side of the converter square; the fire hydrant system includes a fire hydrant arranged in the converter square, and the fire hydrant is connected to the compressed air foam generating device through a pipeline.

Further, the compressed air foam generating device is located in the fire-fighting equipment room, and one fire-fighting equipment room corresponds to one or more groups of converters; each group of converters is set up between valves, and there is a control device in the valve room. The control valve of the spray release pipe and the fire monitor, the spray conveying pipe on the outside of each group of converters passes through the valve room and is connected to the compressed air foam generating device in the fire equipment room through the main spray pipe. After passing through the valve room, the fire monitor delivery pipe on the side of the variable valve hall is connected to the compressed air foam generating device in the fire equipment room through the fire monitor main pipe.

Further, a firewall is provided between adjacent converter units, the spray release pipe is arranged between the converter body and the firewall, and the spray release pipe is located on the top of the converter body and the BOX-IN top plate. It is arranged horizontally extending between the positions of the rheology converter body and the oil collecting pit in the BOX-IN. The spray and flow range of the extension pipe on the valve hall side covers the orifice of the valve side casing riser; the The spray release pipe extends upward from a first spray branch pipe at the radiator, the top of the first spray branch pipe is connected with a horizontal fourth spray branch pipe, and the spraying and flowing range of the fourth spray branch pipe covers the area where the radiator is located and the BOX-IN outer oil collecting pit; the spray release pipe extends upward from the top casing of the converter body to a second spray branch pipe, and the top of the second spray branch pipe is connected with a horizontal fifth spray branch pipe, the spraying and flowing range of the fifth spray branch pipe covers the orifices of the two casing risers; the spray release pipe extends upward from the oil storage tank to a third spray branch pipe, the third spray branch pipe The top is connected with a horizontal sixth spray branch pipe, and the spraying and flowing range of the sixth spray branch pipe covers the area where the oil storage tank is located; the spray release pipe is connected with a downward extending spray conveying pipe, and the spray conveying pipe The bottom end of the sprayer is communicated with the spray delivery main pipe.

Further, the spray release pipe, the extension pipe, the fourth spray branch pipe, the fifth spray branch pipe, and the sixth spray branch pipe are perforated stainless steel pipes, or a plurality of spray heads are arranged on the pipes.

The fire monitor is located on the overhang corresponding to the upper part of the firewall, and the gun muzzle of the fire monitor can be rotated to adjust the spray direction.

Further, the fire monitor is located on the outer side of the overhang, and the fire monitor conveying pipe is arranged on the inner side of the overhang along the arrangement direction of the converter units, and communicates with the fire monitor through a branch pipe at the position corresponding to the fire monitor.

Further, three layers of brackets are fixed on the outer wall of the valve hall on the overhang, and two fire monitor conveying pipes are jointly arranged on one bracket.

Further, the liquid supply pipeline of the fire hydrant system is connected to the main pipe of the fire monitor, or to the main pipe of the spray.

The beneficial effects produced by the present invention are as follows.

1. The present invention adopts the compressed air foam fire-extinguishing system as the fixed fire fighting mode of the converter transformer of the UHV converter station. The use of the compressed air foam has the advantages of high foam stability, good coverage, strong impact momentum, small water consumption, etc., and the fire-extinguishing efficiency high.

2. The present invention applies the system layout of compressed air foam, adopts the combined fire extinguishing system of a fixed spray system and a fixed fire monitor system, and the fixed spray system with the above compressed air foam as the fire extinguishing medium has a short response time, replacing the traditional water spray fire extinguishing The system and foam spray fire extinguishing system can wrap and isolate the air in all directions to achieve the purpose of fire extinguishing. The auxiliary use is a large-flow fire monitor system with a slightly longer response time and compressed air foam as the fire extinguishing medium to ensure the strength of the main ignition points to focus on the fire extinguishing, and the point-to-surface combination. At the same time, a fire hydrant system with compressed air foam as the fire extinguishing medium is set up in the converter square, which can be connected to fire hoses and foam guns, with flexible spray targets and wide coverage, improving fire extinguishing ability and reliability. Therefore, the fire extinguishing system of the present invention has a very effective fire extinguishing effect in response to an initial fire or a larger fire.

3. The present invention mainly uses a mixed solution of water, foam liquid and compressed air, which can effectively save water for firefighting.

4. The valve room and the fire fighting equipment room are set near the converter, which can effectively shorten the pipeline distance between the foam generating device, the valve and the protected converter, so as to obtain a shorter response time.

Description of drawings

FIG. 1A is a schematic side view of the layout of a conventional converter unit using a water spray fire extinguishing system.

FIG. 1B is a schematic top-view layout diagram of a conventional converter unit using a water spray fire extinguishing system.

FIG. 1C is a schematic diagram of the radiator orientation layout of a conventional converter unit using a water spray fire extinguishing system.

FIG. 2A is a schematic side view of a conventional converter unit using a foam spray fire extinguishing system.

FIG. 2B is a schematic plan view of the layout of a conventional converter unit using a foam spray fire extinguishing system.

Fig. 3 is a structural flow chart of the UHV commutated compressed air foam fire extinguishing system of the present invention.

FIG. 4 is a schematic diagram of the layout and structure of the UHV commutated compressed air foam fire extinguishing system of the present invention (taking the commutated back-to-back arrangement as an example).

FIG. 5 is a schematic cross-sectional view of the structure of the converter unit in the present invention.

FIG. 6 is a schematic diagram of the outer structure of a group of commutation transformers in the present invention.

Description of drawing numbers:

Supply device 100, water supply system 101, liquid supply system 102, gas supply system 103, generating device 200, proportional mixing device 201, gas-liquid proportional mixing device 202, release device 300;

Valve room 10, fuel tank 11, radiator 12, oil conservator 13, top bushing 14a, valve side bushing 14b, firewall 15, overhang 16, oil pool 17, fire equipment room 6;

Fixed spray system 40, spray release pipe 41, first spray branch pipe 421, second spray branch pipe 422, third spray branch pipe 423, fourth spray branch pipe 424, fifth spray branch pipe 425, sixth spray pipe Spray branch pipe 426, spray conveying main pipe 43, spray conveying pipe 44, spray main pipe 45;

Fire monitor system 50, fire monitor 51, fire monitor conveying pipe 52, branch pipe 53, bracket 54, fire monitor main pipe 55;

Fire hydrant system 60, fire hydrant 61.

Detailed ways

The following is a detailed description of the process of the fire extinguishing system using compressed air foam in the present invention and the embodiment of the system arrangement.

The fire extinguishing system of the present invention adopts the compressed air foam fire extinguishing method completely different from the traditional fire extinguishing method, that is, the traditional mobile-only configuration of the compressed air foam fire extinguishing system (CAFS) is comprehensively and fixedly applied to the UHV converter.

With reference to the embodiments shown in FIG. 4 to FIG. 6 , an example of the arrangement of pipelines including 4 groups of converter converters in the converter converter square is described.

As shown in the system flow chart in FIG. 3 , the UHV converter compressed air foam fire extinguishing system includes a supply device 100 , a generation device 200 , and a release device 300 .

The supply device 100 includes a water supply system 101 , a liquid supply system 102 , and an air supply system 103 .

The generating device 200 includes a foam proportioning device 201 and a gas-liquid proportioning device 202 . The water source inlet and the foam source inlet of the foam proportional mixing device 201 are respectively connected to the water supply system 101 and the liquid supply system 102, the liquid outlet of the foam proportional mixing device 201 is connected to the liquid inlet of the gas-liquid proportional mixing device 202, and the gas-liquid proportional mixing device 202 The compressed air inlet is connected to the air supply system 103, and the mixed foam solution outlet of the gas-liquid ratio mixing device 202 is connected to a release device 300, which is a fixed sprinkler system 40, a fire monitor system 50 and a fire hydrant located in the converter square. One or any combination of the systems 60, such as two or two combinations or three combinations, are used together, and the three system combinations shown in FIG. 4 are the most complete way.

The generating device 200 , the gas supply system 103 , and the liquid supply system 102 described above are arranged in the fire fighting equipment room 6 , and the fire fighting equipment room 6 is usually near the commutation change as shown in FIG. 4 . The connecting pipeline between the gas-liquid proportional mixing device 202 and the releasing device 300 passes through the valve room 10 , and a control valve and a maintenance valve are arranged on the pipeline located in the valve room 10 . The gas supply system 103 and the liquid supply system 102 can be arranged in the fire fighting equipment room 6 , and can also be arranged in other suitable positions and transported to the fire fighting equipment room 6 by pipelines.

The fire-fighting equipment room 6 and the valve room 10 can be arranged in a coordinated manner as shown in FIG. 4 , or the fire-fighting equipment room 6 and the valve room 10 can also be combined and set up. Specifically, the combined setting can be the fire-fighting equipment room 6 and the valve room 10 The way of adjacent arrangement, or the way of sharing the same space for internal equipment, shall prevail according to the actual demand.

The above water supply system 101 can be located in a pump room and a pool in the converter station. The water supply system 101 is selected from a pool or a water tank, and the water source enters the foam proportion mixing device 201 through a water pump. The liquid supply system 102 may be a foam liquid tank or a foam liquid tank. The air supply system 103 may be an air compressor.

In addition, it also includes a control system. The control system is connected to control foam proportional mixing device 201, gas-liquid proportional mixing device 202, control valve, release device 300, water pump, air compressor, etc., and automatically starts and controls according to actual needs.

Combined with the above structure, the water and the foam liquid are fully mixed into the foam solution by the foam proportion mixing device 201, and a certain proportion of compressed air is introduced into the foam solution by the air compressor, and the compressed air foam solution is formed after mixing in proportion, and then passes through the pipeline. Output fire extinguishing. The foam produced by this method is small and uniform, and has the advantages of less water consumption, good heat radiation barrier ability, good wettability and long fire extinguishing distance. The gas-liquid ratio mixing device 202 is the core of the entire compressed air foam, and its main function is to adjust the optimal mixing ratio of the foam to ensure the compressed air foam solution required for the foam fire extinguishing system.

With reference to the back-to-back arrangement embodiments shown in FIGS. 4 to 6 , 4 groups of converter converters are included in the converter converter square, and each group converter converter is arranged with 6 converter converter units and one converter converter body. and its surrounding space is a converter-transformation unit, and adjacent converter-transformation units are separated by a firewall 15 . As shown in FIG. 5 from left to right, the first converter-transformation unit, the second converter-transformation unit...the sixth converter-transformation unit is defined, and the side of the converter-transformation radiator 12 shown in FIG. 6 is the outer side of the converter-transformation unit. . The side where the converter-transformer oil conservator 13 is located is the side of the converter-transformer valve hall. Such a definition method is convenient for the description of the structure, but does not limit the number and direction. The valve room 10 is provided on the left side of the first converter-transformation unit shown in FIG. 6 , and a firewall 15 is also provided between the first converter-transformation unit and the valve room 10 .

The compressed air foam fire extinguishing system applied in the UHV converter protected by the present invention includes a fixed sprinkler system 40 , a fire monitor system 50 and a fire hydrant system 60 adopting a compressed air foam fire extinguishing method. As shown in the system layout diagram shown in Figure 4, the fixed sprinkler system 40 is arranged on the outside of the converter, the fire monitor system 50 is arranged on the valve hall side, and the fire hydrant system 60 can be arranged at a suitable location nearby according to the actual situation, such as changing Rheological square ends etc.

The fixed sprinkler system 40 is a fixed fire extinguishing part of the entire fire extinguishing system, which includes a sprinkler release pipe 41 that releases compressed air foam in each converter unit. Specifically, as shown in FIG. 6 , a spray release pipe 41 is arranged along the firewall 15 around the converter body in each converter converter body, which is mainly at the root of the top sleeve 14a on the converter converter body The position is extended laterally, covering the converter body and the oil collecting pit in the BOX-IN, and the spraying and flowing range of the extension pipe 41a on the valve hall side of the spray release pipe 41 covers the orifice of the valve side sleeve 14b rising seat. Spray release pipes 41 are arranged on both sides of the converter body.

As shown in FIG. 5 , the spray release pipe 41 extends upward from the first spray branch pipe 421 at the radiator 12 , and the top of the spray pipe 41 is connected with a horizontal fourth spray branch pipe 424 . The spraying and flowing range of the fourth spray branch pipe 424 Cover the area where the radiator 12 is located and the oil collecting pit outside the BOX-IN.

The spray release pipe 41 extends upward from the second spray branch pipe 422 at the top casing 14a of the converter body, and the top of the spray release pipe 41 is connected with a horizontal fifth spray branch pipe 425, so that the fifth spray branch pipe 425 sprays and flows. The range can completely cover the area where the roots of the two sleeves 14a are located, that is, cover the orifice of the raised seat of the two sleeves 14a.

Of course, the above-mentioned manner of distributing the spray pipes is designed for the commutation converter shown in the figure, and is not limited thereto. In fact, the converter structures of different equipment manufacturers are different, and the schematic diagram provided is only one of them. The arrangement principles of spray pipes corresponding to different converters are basically the same, and can be adjusted according to the specific converter structures.

The spray release pipe 41 extends upward from the oil conservator 13 to a third spray branch pipe 423 , the top of which is connected with a horizontal sixth spray branch pipe 426 , and the spraying and flowing range of the sixth spray branch pipe 426 covers the oil conservator 13 your region.

Referring to FIG. 5 and FIG. 6 , the middle part of the spray release pipe 41 of each converter unit is connected to a downwardly extending spray conveying pipe 44 , and the bottom end thereof is communicated with the spray conveying main pipe 43 . The spray conveying pipe 44 is pre-embedded at the bottom of the converter. The spray conveying main pipe 43 is arranged in a one-to-one correspondence with the converter unit.

The spray release pipe 41, the extension pipe 41a, the fourth spray branch pipe 424, the fifth spray branch pipe 425, and the sixth spray branch pipe 426 can be made of perforated stainless steel pipes, or a spray head can be set at an appropriate position on the pipe body. Cover the converter body, the oil tank 11, the oil conservator 13, the root of the casing 14 and the oil pool 17 by spraying and flowing.

The fire monitor system 50 includes a number of fire monitors 51. The fire monitors 51 can be installed on the overhang 16 on the top of the converter valve hall, and can also be installed on the fire monitor turret in the converter square according to requirements.

The embodiment shown in FIGS. 5 and 6 is arranged on the overhang 16, and the fire monitor 51 is preferably arranged between adjacent converter units, that is, above the corresponding firewall 15, and its gun muzzle can be adjusted up, down, left and right. The spraying direction is so that the compressed air foam can be accurately delivered to the location of the fire, and each converter can be used with two fire monitors, which can cover the converter body, fuel tank, oil conservator, casing according to the actual situation. Roots and oil pools, saving the investment of fire monitor. Of course, it can also be arranged directly above the converter unit according to the actual situation, or other arrangements that meet the operating requirements, and no further examples are provided.

The fire monitor 51 is connected to the compressed air foam generating device through the fire monitor conveying pipe 52. As shown in FIG. 5, the fire monitor 51 is located on the outer side of the overhang 16, and the fire monitor is arranged inside the overhang 16 along the arrangement direction of the converter units. The conveying pipe 52 communicates with the fire monitor 51 through a branch pipe 53 at a position corresponding to the fire monitor 51 . As shown in FIG. 6 , in order to ensure that the remote fire monitor 51 can have a sufficient amount of mixed foam solution and injection pressure, the fire monitor conveying pipe 52 and the fire monitor 51 are arranged in a one-to-one correspondence, or in order to save the pipeline and arrangement space , 2 or 3 fire monitors 51 can share one fire monitor conveying pipe 52, and the specific setting method is subject to the actual demand. Three layers of brackets 54 are fixed on the outer wall of the valve hall on the overhang 16 , and two fire monitor conveying pipes 52 are jointly arranged on one bracket 54 to realize a reasonable arrangement of the fire monitor conveying pipes 52 on the overhang 16 .

When the fire monitor 51 is installed on the fire turret of the converter square, the fire monitor 51 is also connected to the compressed air foam generating device through the fire monitor conveying pipe 52, and the fire monitor conveying pipe 52 is arranged on the side of the converter square.

In addition to the above-mentioned arrangement of the fixed sprinkler system and the fire monitor system, a fire hydrant system 60 is also set at the appropriate position at the end of the converter square. This position does not affect the converter transportation, and the fire hose and The foam gun is convenient for personnel to operate, with flexible spray range and large coverage, which can form supplementary protection for the converter and its square.

The delivery pipeline that provides the mixed foam solution for the fire hydrant system 60 can be directly connected to the compressed air foam generating device in the fire fighting equipment room 6, or can be connected to the fire monitor delivery main pipe 54 as shown in Figure 4, or can be connected to the sprayer Mother tube 45.

The invention adopts the compressed air foam fire extinguishing system as the fixed fire fighting mode of the converter transformer of the UHV converter station. Because the compressed air foam has the advantages of high foam stability, good coverage, strong impact momentum, small water consumption, etc., the fire extinguishing efficiency is high, With the arrangement of the above fixed sprinkler system + auxiliary fire monitor system + fire hydrant system, the overall system response time is short, which can effectively replace the traditional water spray fire extinguishing system and foam spray fire extinguishing system.

Claims (9)

1. A compressed air foam fire extinguishing system arrangement structure of an extra-high voltage converter transformer is characterized in that a converter transformer wide field comprises N groups of converter transformers, each group of converter transformers is provided with a plurality of converter transformer units, and the compressed air foam fire extinguishing system arrangement structure further comprises a fixed spraying system (40), a fire monitor fire extinguishing system (50) and a fire hydrant system (60) which all adopt compressed air foam solution;

the fixed foam system (40) comprises a spray release pipe (41) arranged in each converter transformer unit, the spray release pipes (41) are connected to the compressed air foam generating device through spray conveying pipes (44), and the spray conveying pipes (44) are arranged on the outer side of the converter transformers;

the fire monitor system (50) comprises a plurality of fire monitors (51), the fire monitors (51) are arranged on a valve hall side cornice (16) of the converter transformer, the fire monitors (51) are connected with a compressed air foam generating device through fire monitor conveying pipes (52), and the fire monitor conveying pipes (52) are arranged on the converter transformer valve hall side; or the fire monitor (51) is arranged on a fire monitor tower of the converter transformer plaza, the fire monitor (51) is connected with the compressed air foam generating device through a fire monitor conveying pipe (52), and the fire monitor conveying pipe (52) is arranged on the converter transformer plaza side;

the fire hydrant system (60) comprises a fire hydrant (61) arranged on a converter transformer square, and the fire hydrant (61) is connected with a compressed air foam generating device through a pipeline.

2. The arrangement structure of a compressed air foam fire extinguishing system of an extra-high voltage converter transformer according to claim 1, characterized in that the compressed air foam generating device is located in a fire-fighting equipment room (6), and 1 fire-fighting equipment room (6) corresponds to 1 or more than 1 converter transformer;

every group of converter transformer establishes between the valve (10), is equipped with the control valve of control spray release pipe (41), fire gun (51) in the valve room (10), and spray delivery pipe (44) in every group converter transformer outside is through spraying female pipe (45) behind valve room (10) and connecting in the compressed air foam generating device in fire-fighting equipment room (6), fire gun delivery pipe (52) of every group converter transformer valve room side is through connecting in the compressed air foam generating device of fire-fighting equipment room (6) in fire-fighting equipment room (10) back through fire gun female pipe (55).

3. The arrangement structure of a compressed air foam fire extinguishing system of an extra-high voltage converter transformer according to claim 1, wherein each set of converter transformer is provided with a valve room (10), and a plurality of control valves and maintenance valves for controlling the spray release pipe (41), the fire monitor (51) are arranged in the valve room (10).

4. The arrangement structure of a compressed air foam fire extinguishing system of an extra-high voltage converter transformer as recited IN any one of claims 1 to 3, wherein a fire wall (15) is arranged between adjacent converter transformer units, the spray release pipe (41) is arranged between the converter transformer body and the fire wall (15), the spray release pipe (41) is transversely extended and arranged between the top of the converter transformer body and the top plate of the BOX-IN, and covers the oil collecting pit IN the converter transformer body and the BOX-IN, and the spraying and flowing range of the spray release pipe (41) of the extension pipe (41 b) on the valve hall side covers the lifting seat hole of the sleeve (14 b) on the valve side;

the spray release pipe (41) extends upwards to form a first spray branch pipe (421) at the position of the radiator (12), the top of the first spray branch pipe (421) is communicated with a transverse fourth spray branch pipe (424), and the spraying and flowing range of the fourth spray branch pipe (424) covers the area where the radiator (12) is located and a BOX-IN outer oil collecting pit;

the spray release pipe (41) extends upwards to form a second spray branch pipe (422) at a sleeve (14 a) at the top of the converter body, the top of the second spray branch pipe (422) is communicated with a transverse fifth spray branch pipe (425), and the spraying and flowing range of the fifth spray branch pipe (425) covers 2 sleeve (14 a) lifting seat orifices;

the spraying release pipe (41) extends upwards to form a third spraying branch pipe (423) at the oil storage cabinet (13), the top of the third spraying branch pipe (423) is communicated with a transverse sixth spraying branch pipe (426), and the spraying and flowing range of the sixth spraying branch pipe (426) covers the area where the oil storage cabinet (13) is located;

the spraying release pipe (41) is connected with a spraying conveying pipe (44) extending downwards, and the bottom end of the spraying conveying pipe (44) is communicated with a spraying conveying main pipe (43).

5. The arrangement structure of the ultra-high voltage converter transformer compressed air foam fire extinguishing system is characterized in that the spray release pipe (41), the extension pipe (41 a), the fourth spray branch pipe (424), the fifth spray branch pipe (425) and the sixth spray branch pipe (426) are made of perforated stainless steel pipes or a plurality of spray heads are arranged on a pipeline.

6. The arrangement structure of the compressed air foam fire extinguishing system of the extra-high voltage converter transformer is characterized in that the fire monitor (51) is positioned on the cornice (16) corresponding to the upper part of the firewall (15), and the muzzle of the fire monitor (51) can be rotated to adjust the spraying direction.

7. The arrangement structure of a compressed air foam fire extinguishing system of an extra-high voltage converter transformer according to claim 4, wherein the fire monitor (51) is positioned on the upper outer side of the cornice (16), the fire monitor delivery pipe (52) is arranged on the upper inner side of the cornice (16) along the arrangement direction of the converter transformer units, and the fire monitor delivery pipe is communicated with the fire monitor (51) through a branch pipe (53) at the position corresponding to the fire monitor (51).

8. The arrangement structure of a compressed air foam fire extinguishing system of an extra-high voltage converter transformer according to claim 7, characterized in that 3 layers of brackets (54) are fixed on the outer wall of the valve hall on the cornice (16), and 2 fire monitor conveying pipes (52) are jointly arranged on 1 bracket (54).

9. The arrangement of an extra-high voltage converter transformer compressed air foam fire extinguishing system according to claim 4, characterized in that the liquid supply line of the fire hydrant system (60) is connected to a fire monitor main pipe (55) or to a spray main pipe (45).

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