CN112031492A - Novel valve hall plugging structure and fire-resistant checking method - Google Patents
Novel valve hall plugging structure and fire-resistant checking method Download PDFInfo
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- CN112031492A CN112031492A CN202010737445.3A CN202010737445A CN112031492A CN 112031492 A CN112031492 A CN 112031492A CN 202010737445 A CN202010737445 A CN 202010737445A CN 112031492 A CN112031492 A CN 112031492A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/941—Building elements specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/941—Building elements specially adapted therefor
- E04B1/942—Building elements specially adapted therefor slab-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
Abstract
The invention discloses a novel valve hall plugging structure and a fire-resistant checking method, and relates to the field of direct-current transmission, wherein the structure is used for enhancing the fire and explosion prevention capacity of a firewall between a converter transformer and a valve hall and comprises a first plugging and a second plugging, a converter transformer bushing on the converter transformer side passes through the first plugging and extends out to the valve hall side, and the second plugging is arranged on the contact surface of the converter transformer bushing and the first plugging; the first plugging comprises a buffering energy absorbing layer, an explosion-proof steel plate layer and a fireproof layer which are sequentially connected from a converter transformer side to a valve hall side, and the second plugging comprises a ceramic silicon rubber waterproof sealing sleeve sleeved on the converter transformer sleeve and an aluminum silicate fiber needled blanket filled between the converter transformer sleeve and a contact surface of the first plugging. The method is used for fire-resistant verification of structures. The structure of the invention can not deform and fail under the harsh high-temperature combustion condition, thereby protecting the valve hall equipment from being damaged under the adverse condition of transformer explosion and fire.
Description
Technical Field
The invention relates to the field of direct-current power transmission, in particular to a novel valve hall plugging structure and a fire-resistant checking method.
Background
The converter transformer adopts an arrangement mode adjacent to the valve hall, a firewall is arranged between the converter transformer and the valve hall, and the converter transformer valve side sleeve is inserted into the valve hall through a hole formed in the firewall. After the converter transformer is installed in place, the hole needs to be plugged so as to meet the operation requirement of a valve hall.
The active fire of the converter transformer is generally caused by the internal fault temperature rise of the converter transformer, particularly the electric arc generates heat, the temperature can reach thousands of degrees, the insulating oil is cracked into combustible gas, the temperature rise of the insulating oil and the cracked combustible gas form larger stress in the converter transformer oil tank body, the converter transformer oil-filled shell is cracked, and the insulating oil leaks and burns. Physical explosion can be caused by the rupture of the oil-filled shell; combustible gas cracked from the insulating oil can also leak out along with the insulating oil, and chemical explosion can occur when the concentration of the combustible gas in the air reaches the explosion concentration.
At present, the structure of the prior single-layer fireproof plate is not specially provided with a structure for preventing explosion force, and the actual fire case also shows that the prior single-layer fireproof plate structure can not resist the explosion impact force. These explosions are usually generated simultaneously with the converter transformer fire, and thus the single-layer fire-protection panel structure may be damaged by the explosive force to lose the fire-protection capability in the event of a fire.
Therefore, a novel fireproof and explosion-proof blocking structure and a checking method for checking the fireproof performance of the blocking structure are needed to be designed.
Disclosure of Invention
Aiming at the defects in the prior art, one of the purposes of the invention is to provide a novel valve hall plugging structure which can not deform and fail under the harsh high-temperature combustion condition, so that the valve hall equipment can be protected from being damaged under the unfavorable condition of transformer explosion and fire. Meanwhile, the invention also aims to provide a fire resistance checking method.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a novel valve hall plugging structure is used for enhancing the fireproof and explosion-proof capacity of a firewall between a converter transformer and a valve hall, and comprises a first plug and a second plug, wherein a converter transformer sleeve on the converter transformer side penetrates through the first plug and extends out of the valve hall side, and the second plug is arranged on the contact surface of the converter transformer sleeve and the first plug;
the first plug comprises a buffering energy absorption layer, an explosion-proof steel plate layer and a fireproof layer which are sequentially connected from the converter transformer side to the valve hall side, wherein the buffering energy absorption layer is a buffering energy-absorbing low-magnetic-conductivity metal plate with an empty-bag structure;
the explosion-proof steel plate layer is a stainless steel explosion-proof plate;
the fireproof layer comprises a keel frame and a plurality of layers of aluminum silicate plates, the keel frame fixes the plurality of layers of stainless steel surface layer explosion-proof plates into a rectangular body, the right end face of the rectangular body is fixedly connected with the fireproof wall through the keel frame, the outer end face of the rectangular body is fixedly connected with the stainless steel explosion-proof plates through the keel frame, and the right end face and the outer end face of the rectangular body are adjacent;
the second plug comprises a ceramic silicon rubber waterproof sealing sleeve sleeved on the converter transformer sleeve and an aluminum silicate fiber needled blanket filled between the converter transformer sleeve and the contact surface of the first plug.
The novel structure of valve room shutoff as above, it is further, still including setting up respectively the structure of borduring of terminal surface around the first shutoff, the structure of borduring is used for keeping apart the protection with the external world with the connecting portion between first shutoff and the fire wall, the structure of borduring includes aluminum silicate plate and cladding in proper order the multilayer fire resistive construction of aluminum silicate, multilayer fire resistive construction includes aluminum silicate needle-punched blanket, fire prevention waterproof glue, does not have magnetized stainless steel and fire retardant coating, wherein, aluminum silicate needle-punched blanket is used for the cladding on the aluminum silicate, fire prevention waterproof glue cover in on the aluminum silicate needle-punched blanket and solidification form the protective layer, do not have magnetized stainless steel to bordure the protective layer that forms after the solidification, fire retardant coating is used for the spraying and is in the table side of non-magnetized stainless steel and external contact.
The novel valve hall plugging structure further comprises a steel plate, wherein the steel plate is fixedly welded with the edge covering structure, and the steel plate is fixed on the firewall through an elastic connecting piece.
According to the novel valve hall plugging structure, further, the keel frame is made of H-shaped galvanized steel, the aluminum silicate plate, the stainless steel explosion-proof plate and the buffering energy-absorbing low-magnetism guide plate are connected through double-sided bayonets, and all connecting gaps are sealed through special sealing glue for the profiled steel plates.
A fire-proof verification method for a new valve hall plugging structure fire-proof verification as described above, the method comprising the steps of:
installation of the sample: fixing a valve hall plugging novel structure sample with a specified size near a test furnace mouth, plugging a boundary gap of the sample by using a flame retardant material, and exposing the whole area of a fire-facing surface of the sample to fire;
heating mode: raising the temperature of the hot spot on the surface of the fire facing surface according to a certain rule and monitoring the temperature deviation of the test furnace;
mixed gas blowing and atomized kerosene spraying: spraying atomized kerosene to the heated surface at a certain distance from the heated surface of the sample while starting heating, wherein the atomized kerosene is sprayed once at certain intervals, and a certain amount of atomized kerosene is sprayed each time; blowing mixed gas upwards from the bottom at a certain distance from the heated surface of the sample, and blowing a certain amount of mixed gas every minute;
the movement of the iron wire frame: the iron wire frame is added between two preset points on the back fire surface of the sample to move back and forth slowly, and each point stays for a set time;
results and evaluation: and after the temperature rise time lasts for the set time, judging the fire resistance of the sample according to the condition of the back fire surface of the sample and the condition of cotton on the wire frame.
In the fire proofing method, the hot spot temperature on the fire surface is increased according to the following temperature increasing curve:
T＝345lg(8t+1)+20/k0
wherein T is the temperature of the hot spot on the surface of the fire-facing area of the sample and is measured in degrees centigrade. t is time in minutes; k is a radical of0Is an altitude correction factor; k is a radical of0＝5.3789*10-9*H2-1.1975*10-4H +1, H being altitude in meters;
according to the fire resistance checking method, the temperature deviation of the test furnace can meet the following constraint conditions:
in the formula, delta is deviation, A is the area under a target temperature rise curve, and As is the area under a curve of average temperature of a sample facing a fire surface;
pressure difference in the furnace: monitoring the average pressure value in the furnace and controlling the change of the pressure in the furnace;
the fire proofing method as described above, further, satisfying any one of the following, the test is not passed:
puncturing the cracks of the back fire surface by using a probe, wherein the probe can penetrate through the cracks;
the wire rack has cotton ignited.
Compared with the prior art, the invention has the beneficial effects that:
(1) the fireproof performance is improved: the large plug adopts a multi-layer fireproof structure from outside to inside, so that the fire spread is effectively prevented. The inside and outside both sides of block structure all set up the compound PLASTIC LAMINATED of structural rock wool.
(2) The heat insulation performance is improved: the keel frame is filled with the aluminum silicate plate, the temperature resistance is up to 950-1400 ℃, the extensibility is good, the shock resistance is strong, the heat insulation can be effectively realized and the heat transfer time can be prolonged when a fire disaster occurs, and the heat insulation performance of the plugging structure is ensured.
(3) And (3) the antiknock performance is improved: the buffering energy absorption layer and the stainless steel explosion-proof plate jointly form a plugged explosion-proof structure, so that the explosion impact force generated during deflagration of the converter transformer is resisted, and the overall anti-explosion capability of the plugging structure is improved.
(4) Improving large plugging wrapping: the large plugging edge covering adopts a five-layer structure, has the functions of fire resistance, heat insulation and moisture resistance, effectively prevents the outdoor fire source in the valve hall from spreading, and simultaneously ensures the sealing property of the large plugging edge covering.
(5) The structure performance is improved, and the mixed fixing form of elastic connection and welding is adopted, so that the buffering and energy-absorbing performance of the explosive load is improved, and the main fixing structure is ensured not to fall off under the explosive impact.
Drawings
FIG. 1 is a schematic structural diagram of a converter transformer valve side sleeve fireproof plug in practice;
FIG. 2 is a schematic view of a novel fire blocking structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an experimental platform for the fire-resistant verification method of the present invention;
FIG. 4 is a flow chart of a method of the present invention for fire proofing.
Wherein, 1, concrete firewall; 2. a first edge-wrapping structure; 3. a stainless steel explosion-proof plate; 4. the buffer energy-absorbing low-magnetic-conductance metal plate; 5. an aluminum silicate fiber needled blanket; 6. a converter transformer bushing; 7. an elastic connecting member; 8. a steel plate; 9. a welding point; 10. a second edging structure; 11. a keel frame; 12. stainless steel surface layer explosion-proof plate; 13. a test furnace; 14. a laser radar; 15. a cotton pad; 16. a sliding rail type iron wire frame with meshes; 17. a sample; 18. a mixed gas injection port; 19. a kerosene sprayer; 20. a burner.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
it will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a fireproof blocking structure of a converter transformer valve side sleeve in practice, the converter transformers are all arranged in a manner of being adjacent to a valve hall, a firewall is arranged between the converter transformer and the valve hall, and the converter transformer valve side sleeve is inserted into the valve hall through a hole formed in the firewall. After the converter transformer is installed in place, the hole needs to be plugged so as to meet the operation requirement of a valve hall. In fig. 1, a converter transformer bushing on the converter transformer side is inserted into a valve hall through a hole in a firewall.
Referring to fig. 2, fig. 2 is a schematic view of the novel fireproof blocking structure according to the embodiment of the present invention, the schematic view is obtained by observing from top to bottom, for convenience of description, the first blocking is also called large blocking, and the second blocking is also called small blocking, which is a novel valve hall blocking structure used for enhancing the fireproof and explosion-proof capability of the firewall between the converter transformer and the valve hall.
In the figure, a concrete firewall 1 is a partition wall body originally arranged between a converter transformer and a valve hall, a novel valve hall plugging structure is arranged between a left concrete firewall 1 and a right concrete firewall 1, a converter transformer sleeve 6 on the converter transformer side penetrates through a first plug and extends out to the valve hall side, the first plug comprises a buffering energy absorption layer, an explosion-proof steel plate layer and a fireproof layer which are sequentially connected from the converter transformer side to the valve hall side, and the buffering energy absorption layer is a buffering energy-absorbing low-magnetic-conductivity metal plate 4 with an empty-bag structure; the explosion-proof steel plate layer is a stainless steel explosion-proof plate 3; the fireproof layer comprises a keel frame 11 and a plurality of layers of stainless steel surface layer explosion-proof plates 12, the keel frame 11 fixes the plurality of layers of stainless steel surface layer explosion-proof plates 12 into a rectangular body, the right end face of the rectangular body is fixedly connected with the concrete fireproof wall 1 through the keel frame 11, the outer end face of the rectangular body is fixedly connected with the stainless steel explosion-proof plates 3 through the keel frame 11, and the right end face of the rectangular body is adjacent to the outer end face; the second plug comprises a ceramic silicon rubber waterproof sealing sleeve sleeved on the converter transformer sleeve 6 and an aluminum silicate fiber needled blanket 5 filled between the contact surface of the converter transformer sleeve 6 and the first plug. The front end face and the rear end face of the first plug are respectively provided with a first edge covering structure 2 and a second edge covering structure 10, the edge covering structures are used for isolating and protecting the connecting portion between the first plug and the concrete fire protection wall 1 from the outside, a welding point 9 is fixed between the steel plate 8 and the edge covering structures, and the steel plate 8 is fixed on the concrete fire protection wall 1 through an elastic connecting piece 7.
Specifically, the large plugging is sequentially from the outdoor (converter transformer side) to the indoor (valve hall side): the first layer (buffering energy absorbing layer), the second layer (explosion-proof steel plate layer) and the third layer (fireproof layer, specifically 10 layers of the aluminum silicate fireproof explosion-proof plate). Specifically, the energy absorption layer is a 50mm energy absorption buffering low-magnetic-conductivity metal plate with a hollow structure, such as an aluminum plate with a hollow structure inside or an approximate material, the explosion-proof steel plate layer is a 35 mm-thick stainless steel explosion-proof plate, such as a 00Cr20Ni18Mo6CuN or an approximate material, the fireproof layer is a 180 mm-thick keel frame, an aluminum silicate plate embedded in the keel frame and a single-layer 19mm aluminum silicate fireproof explosion-proof plate (ten layers in total).
The stainless steel explosion-proof plate has the advantages of flame retardance, explosion resistance, impact resistance, moisture resistance, fire protection, shock resistance, corrosion resistance, large breadth, weather resistance (not changing along with the change of air temperature), high resistance, sound absorption, frost resistance, non-magnetic conductivity and the like.
The keel frame and the stainless steel surface layer explosion-proof plate jointly form a blocked explosion-proof structure to resist the explosion impact force generated when the converter flows and detonates. According to the active fire behavior process of the converter transformer, the explosive force damage after the active fire of the converter transformer is generally earlier than the fire damage, so the explosion-proof layer is arranged on the outer side of the fireproof layer to protect the fireproof layer from being damaged by the explosive force.
The aluminum silicate plate is heat-insulating, has the temperature resistance of 950-1400 ℃, has good extensibility and strong shock resistance, can effectively insulate heat and prolong the heat transfer time when a fire disaster occurs, and prolongs the temperature rise time interval of a fire-receiving surface as much as possible.
In some embodiments, all connections are welded as much as possible to ensure that the fusion-fusing phenomenon is not generated under the condition of high-temperature heating. Connecting piece of big shutoff: the keel frame and the explosion-proof layer of the large plug are fixed with the periphery of the concrete firewall by adopting H-shaped galvanized steel, and the H-shaped galvanized steel is embedded into the concrete firewall for fixing, so that the anti-explosive capacity of the joint of the large plug and the concrete firewall is enhanced.
Specifically, the explosion-proof layer is connected by a high-strength spring and fixed with the keel frame, and the outer side of the explosion-proof layer is filled with aluminum silicate fiber cotton; the fireproof plate (aluminum silicate plate) is connected by a high-strength spring and fixed with the keel frame.
Specifically, the fireproof plate (aluminum silicate plate), the stainless steel explosion-proof plate and the buffering energy-absorbing low-magnetic-flux guide plate are connected through double-sided bayonets, the fixing strength is high, the combination degree and the integrity are good, the joint between the plates is sealed through special sealant for profiled steel plates, and the sealing performance of the joint between the plates is good.
In some embodiments, the large blocking wrapping edge (i.e. wrapping edge structure) is an aluminum silicate composite plate, which has a five-layer structure from inside to outside, a first aluminum silicate plate with a thickness of 50mm is fixed on the aluminum silicate plate and the concrete firewall (or on the buffering energy-absorbing low-magnetic guide plate and the concrete firewall) by using stainless steel screws, a second aluminum silicate needle blanket is wrapped, a third aluminum silicate needle blanket is covered by fireproof waterproof glue (such as Osbang high-temperature-resistant sealant or similar material) and is cured to form a protective layer, a fourth aluminum silicate plate is wrapped by 1.2mm nonmagnetic stainless steel material (such as 18Cr-8Ni or similar material), all external screws are made of high-temperature-resistant stainless steel, and the edge of the large blocking wrapping edge is made of waterproof and fireproof special blocking glue (such as Osbang high-temperature-resistant sealant or. The fifth layer is fireproof paint, and the fireproof paint is sprayed on the outer side of the whole edge covering outside the valve hall after the whole installation is finished, so that the fire source is effectively prevented from spreading through gaps.
In some embodiments, the gap between the converter transformer casing pipe and the structural rock wool composite fireproof plate is small. The small plugs are filled with the aluminum silicate fiber needled blanket, and the material cannot generate any change under the high-temperature condition of 1200 ℃.
Specifically, the small sealing surface is wrapped by a ceramic silicon rubber waterproof sealing sleeve, the ceramic silicon rubber waterproof sealing sleeve and the fireproof plate are fixed by a stainless steel self-tapping self-drilling screw and an aluminum alloy compression ring, and the ceramic silicon rubber waterproof sealing sleeve and the converter transformer bushing are fixed by a stainless steel pipe clamp.
In a specific example, the ceramic silicon rubber waterproof sealing sleeve adopts high-temperature vulcanized ceramic silicon rubber which is immediately vitrified after the temperature is high at 800 ℃ so as to prevent fire from spreading; stainless steel screws are adopted for all the periphery fastening dovetail nails; and four sides of the fire-proof and waterproof sealing rubber are provided with special sealing rubber for fire prevention and water prevention, so that the fire source is further prevented from spreading.
Referring to fig. 3 and 4, fig. 3 is a schematic diagram of an experimental platform of the fire-resistant verification method of the present invention; FIG. 4 is a flow chart of a method of the present invention for fire proofing. In fig. 3, the fire-resistant checking method can be implemented by setting up the following test platform, where the test platform includes: the test furnace 13 (a heat source consisting of a plurality of burners 20), the laser radar 14, the mixed gas 18, the kerosene sprayer 19, the electronic timer, the altitude height meter, the sliding rail type wire rack 16 with meshes, the gap probe and the pressure measuring probe are specifically described as follows:
A) test furnace
The test furnace adopts liquid or gas fuel, and can be fired on one side of the sample.
B) Laser radar
A high-temperature-resistant high-spectral-resolution laser radar is used as a temperature field testing instrument.
C) Mixed gas (es)
The large-capacity anti-explosion steel cylinder stores mixed gas of 25 percent of high-pressure oxygen, 75 percent of nitrogen and less than 3ppm of water.
D) Kerosene sprayer
When spraying, the floor submerged type sprayer opens the baffle plate and sprays the water from the deep position of the absorbing position to the position 1.5m away from the ground in alignment with the center of the heating surface. Spraying 10L of atomized kerosene every 5 min/time.
E) Electronic timer
Adopts a weather-proof, heat-resistant and explosion-proof electronic timer.
F) Altitude altimeter
An altitude meter using a GPS based on a solid geometry is used.
G) Sliding rail type iron wire frame with mesh
The wire rack is 3300mm long, 3300mm wide, evenly spread 7cm square wire mesh, is equipped with the little clip in the mesh. A fluffy and soft absorbent cotton pad 15 is hung on each mesh of the iron wire frame.
H) Gap probe
With an insulated handle for measuring the integrity of the sample. The diameter is 5.9-6.1 mm.
I) Pressure measuring probe
Is arranged at a position convenient for monitoring the pressure in the furnace and is not arranged at a position directly impacted by flame airflow or on a smoke exhaust pipe.
Referring to fig. 4, the assay method includes:
1. mounting of samples
The sample is arranged at the edge of the test furnace mouth and fixed by restraint, and the boundary gap is blocked by flame retardant material. The sample is 3000mm high and 2000mm wide, and the whole area of the fire-facing surface is exposed to fire.
2. Heating mode
The hot spot temperature on the fire surface is carried out according to the following temperature rise curve (target temperature rise function).
T＝345lg(8t+1)+20/k0
T is the temperature of the hot spot on the surface of the sample in the fire area and is measured in degrees centigrade. t is time in minutes. k is a radical of0Is the altitude correction factor.
k0＝5.3789*10-9*H2-1.1975*10-4*H+1
H is altitude, in meters. For simplicity of calculation, the values are given in table 1 below.
TABLE 1
The furnace temperature deviation delta should satisfy the following constraint conditions:
Δ is the deviation, A is the area under the target temperature rise curve, and As is the area under the average temperature curve of the sample to the fire surface.
3) Differential pressure in furnace
The average pressure value in the furnace is monitored. And controlling the change of the pressure in the furnace, wherein the pressure value is 10-20Pa after 5min from the beginning of the test, and the pressure value is 14-20Pa after 10 min.
4) Blowing in mixed gas
Spraying atomized kerosene to the heated surface at a position 100mm away from the fire surface of the sample while starting heating, wherein 10L of atomized kerosene is sprayed every 5 min/time; while blowing the mixed gas upward from the bottom at a distance of 20mm from the heated surface of the specimen, 5L per minute.
5) Atomized kerosene spray
Spraying atomized kerosene to the heated surface at a position 100mm away from the fire surface of the sample while starting heating, wherein 10L of atomized kerosene is sprayed every 5 min/time; while blowing the mixed gas upward from the bottom at a distance of 20mm from the heated surface of the specimen, 5L per minute.
6) Movement of wire holders
The iron wire frame is added between the point A and the point B of the back fire surface to move back and forth slowly, and each point stays for 30 seconds. Wherein A is 30mm away from the back fire surface of the sample, and B is 900mm away from the back fire surface of the sample.
Results and evaluation
After the temperature rise time lasted 240 min. The test was not passed if any of the following was satisfied.
1. And (4) puncturing the cracks on the back fire surface by using a probe, wherein the probe can penetrate through the cracks.
2. The wire rack has cotton ignited.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (8)
1. A novel valve hall plugging structure is used for enhancing the fireproof and explosion-proof capacity of a firewall between a converter transformer and a valve hall and is characterized in that the novel valve hall plugging structure comprises a first plug and a second plug, a converter transformer sleeve on the converter transformer side penetrates through the first plug and extends out to the valve hall side, and the second plug is arranged on the contact surface of the converter transformer sleeve and the first plug;
the first plug comprises a buffering energy absorbing layer, an explosion-proof steel plate layer and a fireproof layer which are sequentially connected from the converter transformer side to the valve hall side,
the buffer energy absorption layer is a buffer energy absorption low-magnetic-conductivity metal plate with an empty-bag structure;
the explosion-proof steel plate layer is a stainless steel explosion-proof plate;
the fireproof layer comprises a keel frame and a plurality of layers of aluminum silicate plates, the keel frame fixes the plurality of layers of stainless steel surface layer explosion-proof plates into a rectangular body, the right end face of the rectangular body is fixedly connected with the fireproof wall through the keel frame, the outer end face of the rectangular body is fixedly connected with the stainless steel explosion-proof plates through the keel frame, and the right end face and the outer end face of the rectangular body are adjacent;
the second plug comprises a ceramic silicon rubber waterproof sealing sleeve sleeved on the converter transformer sleeve and an aluminum silicate fiber needled blanket filled between the converter transformer sleeve and the contact surface of the first plug.
2. The novel structure of valve hall shutoff of claim 1, characterized in that, still include the structure of borduring that sets up respectively terminal surface around the first shutoff, the structure of borduring is used for keeping apart protection with the external world with the connecting portion between first shutoff and the firewall, the structure of borduring includes aluminium silicate plate and cladding in proper order the multilayer fire resistive construction of aluminium silicate, multilayer fire resistive construction includes aluminium silicate acupuncture blanket, fire prevention waterproof glue, no magnetized stainless steel and fire proof coating, wherein, aluminium silicate acupuncture blanket is used for the cladding on the aluminium silicate, the fire prevention waterproof glue covers in the aluminium silicate blanket and solidifies and form the protective layer, no magnetized stainless steel bordures the protective layer that forms after the solidification, fire proof coating is used for spraying the surface side of no magnetized stainless steel and external contact.
3. The novel valve hall plugging structure according to claim 2, further comprising a steel plate, wherein the steel plate and the edge-covered structure are welded and fixed, and the steel plate is fixed on the firewall through an elastic connecting piece.
4. The novel valve hall plugging structure according to any one of claims 1 to 3, wherein the keel frame is made of H-shaped galvanized steel, the aluminum silicate plate, the stainless steel explosion-proof plate and the buffering energy-absorbing low-magnetic-flux guide plate are connected by double-sided bayonet connection, and each connecting gap is sealed by a special sealant for a profiled steel plate.
5. A fire-proof verification method for the novel valve hall plugging structure according to any one of claims 1 to 4, comprising the steps of:
installation of the sample: fixing a valve hall plugging novel structure sample with a specified size near a test furnace mouth, plugging a boundary gap of the sample by using a flame retardant material, and exposing the whole area of a fire-facing surface of the sample to fire;
heating mode: raising the temperature of the hot spot on the surface of the fire facing surface according to a certain rule and monitoring the temperature deviation of the test furnace;
mixed gas blowing and atomized kerosene spraying: spraying atomized kerosene to the heated surface at a certain distance from the heated surface of the sample while starting heating, wherein the atomized kerosene is sprayed once at certain intervals, and a certain amount of atomized kerosene is sprayed each time; blowing mixed gas upwards from the bottom at a certain distance from the heated surface of the sample, and blowing a certain amount of mixed gas every minute;
the movement of the iron wire frame: the iron wire frame is added between two preset points on the back fire surface of the sample to move back and forth slowly, and each point stays for a set time;
results and evaluation: and after the temperature rise time lasts for the set time, judging the fire resistance of the sample according to the condition of the back fire surface of the sample and the condition of cotton on the wire frame.
6. The fire resistance verification method according to claim 5, wherein the hot spot temperature to the fire surface is performed according to the following temperature rise curve:
T＝345lg(8t+1)+20/k0
wherein T is the temperature of the hot spot on the surface of the fire-facing area of the sample and is measured in degrees centigrade. t is time in minutes; k is a radical of0Is an altitude correction factor; k is a radical of0＝5.3789*10-9*H2-1.1975*10-4H +1, H is altitude in meters.
7. The fire resistance verification method according to claim 5, wherein the deviation of the test furnace temperature satisfies the following constraint conditions:
in the formula, delta is deviation, A is the area under a target temperature rise curve, and As is the area under a curve of average temperature of a sample facing a fire surface;
pressure difference in the furnace: and monitoring the average pressure value in the furnace, and controlling the change of the pressure in the furnace.
8. The fire proofing method of claim 5, wherein any one of the following is satisfied and the test fails:
puncturing the cracks of the back fire surface by using a probe, wherein the probe can penetrate through the cracks;
the wire rack has cotton ignited.
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| CN202010737445.3A CN112031492A (en) | 2020-07-28 | 2020-07-28 | Novel valve hall plugging structure and fire-resistant checking method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031493A (en) * | 2020-07-28 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Novel valve hall plugging structure and anti-explosion checking method |
| CN114812440A (en) * | 2022-04-22 | 2022-07-29 | 国网湖北省电力有限公司十堰供电公司 | High-rise building fireproof plugging module defect detection device and method based on line structured light |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3088617A1 (en) * | 2015-04-22 | 2016-11-02 | Uponor Infra Oy | Wall with a passageway and a method for the production thereof |
| CN207314584U (en) * | 2017-10-12 | 2018-05-04 | 江西省李渡烟花销售有限公司 | A kind of fire-proof and explosion-proof wall body structure |
| CN109235679A (en) * | 2018-08-30 | 2019-01-18 | 公安部四川消防研究所 | A kind of fire-proof and explosion-proof pressure reductor |
| CN209145053U (en) * | 2018-10-18 | 2019-07-23 | 南通世睿电力科技有限公司 | A kind of valve hall casing hole occluder frame frame structure |
| CN110145047A (en) * | 2019-05-24 | 2019-08-20 | 应急管理部四川消防研究所 | A kind of substation's firewall plugging structure |
| CN209620666U (en) * | 2018-12-27 | 2019-11-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of unsymmetric structure fireproof blocking of converter transformer valve-side sleeve valve hall hole |
| CN110714544A (en) * | 2019-07-30 | 2020-01-21 | 全球能源互联网研究院有限公司 | Plugging structure |
| CN112031493A (en) * | 2020-07-28 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Novel valve hall plugging structure and anti-explosion checking method |
-
2020
- 2020-07-28 CN CN202010737445.3A patent/CN112031492A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3088617A1 (en) * | 2015-04-22 | 2016-11-02 | Uponor Infra Oy | Wall with a passageway and a method for the production thereof |
| CN207314584U (en) * | 2017-10-12 | 2018-05-04 | 江西省李渡烟花销售有限公司 | A kind of fire-proof and explosion-proof wall body structure |
| CN109235679A (en) * | 2018-08-30 | 2019-01-18 | 公安部四川消防研究所 | A kind of fire-proof and explosion-proof pressure reductor |
| CN209145053U (en) * | 2018-10-18 | 2019-07-23 | 南通世睿电力科技有限公司 | A kind of valve hall casing hole occluder frame frame structure |
| CN209620666U (en) * | 2018-12-27 | 2019-11-12 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of unsymmetric structure fireproof blocking of converter transformer valve-side sleeve valve hall hole |
| CN110145047A (en) * | 2019-05-24 | 2019-08-20 | 应急管理部四川消防研究所 | A kind of substation's firewall plugging structure |
| CN110714544A (en) * | 2019-07-30 | 2020-01-21 | 全球能源互联网研究院有限公司 | Plugging structure |
| CN112031493A (en) * | 2020-07-28 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Novel valve hall plugging structure and anti-explosion checking method |
Non-Patent Citations (1)
| Title |
|---|
| 国家质量技术监督局发布: "《建筑构件耐火试验方法 第1部分：通用要求》", 1 March 2009 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031493A (en) * | 2020-07-28 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Novel valve hall plugging structure and anti-explosion checking method |
| CN114812440A (en) * | 2022-04-22 | 2022-07-29 | 国网湖北省电力有限公司十堰供电公司 | High-rise building fireproof plugging module defect detection device and method based on line structured light |
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Application publication date: 20201204 |