LU103005B1 - System and method for simulating fire of cable trench and measuring stability of cover plate structure - Google Patents
System and method for simulating fire of cable trench and measuring stability of cover plate structure Download PDFInfo
- Publication number
- LU103005B1 LU103005B1 LU103005A LU103005A LU103005B1 LU 103005 B1 LU103005 B1 LU 103005B1 LU 103005 A LU103005 A LU 103005A LU 103005 A LU103005 A LU 103005A LU 103005 B1 LU103005 B1 LU 103005B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- cover plate
- cable trench
- cable
- cables
- plate
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Details Of Indoor Wiring (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a system and method for simulating fire of a cable trench and measuring the stability of a cover plate structure. The system comprises a cable trench body, a cover plate bracket, a support frame, a cable carrier, a combustion apparatus, water spray apparatuses and a blowing apparatus. A dimension of an inner cavity of the cable trench body is adjustable, and the cover plate bracket is used for supporting the cover plate of the cable trench and installing an aerosol fire extinguisher. The cable carrier comprises cable cleats for clamping cables with different diameters, and a separation distance between every two cable cleats is adjustable. The combustion apparatus is used for igniting cables on the cable carrier. Each water spray apparatuses is used for adjusting humidity of the cable trench body. The blowing apparatus is used for blowing fresh air into the cable trench body.
Description
N34P5LU 02.09.2022
SYSTEM AND METHOD FOR SIMULATING FIRE OF CABLE TRENCH AND LU 03005
MEASURING STABILITY OF COVER PLATE STRUCTURE
[0001] 1. Technical Field
[0002] The invention relates to the technical field of fire safety of cable trenches, particularly to a system and method for simulating a fire of a cable trench and measuring the stability of a cover plate structure.
[0003] 2. Description of Related Art
[0004] Cable trenches are indispensable infrastructures for power supply system construction. With the development of the times, potential safety hazards of fires of the cable trenches themselves cannot be ignored while cables and cable trenches are used increasingly.
Outbreak of fire of the cable trenches will lead to a huge economic loss as easy as pie, even casualties. In addition, as most cable trenches are of closed structures, so that it is hard to perceive and control fires of the cable trenches and the recovery time is long. In case of outbreak of fire of the cable trenches, a severe consequence of equipment damage and casualties will be inevitably caused. Therefore, to establish an experimental platform for simulating the fire of the cable trench, explore the combustion spread characteristic of the fire of the cable trench and analyze the critical influence factors that affect development of the fire of the cable trench to formulate a fire extinguishing and fire control policy in a targeted manner can reduce the potential safety hazards of the fire of the cable trench to the maximum extent.
[0005] A Chinese patent CN110322769A discloses a movable power cable fire simulation test platform. The test platform comprises a movable box body, a cable, a fire source apparatus, a temperature measurement apparatus, a fire extinguishing apparatus, a gas measurement apparatus and a soot and gas purification apparatus, where the cable, the temperature measurement apparatus, the fire source apparatus, the fire extinguishing apparatus and the gas measurement apparatus are arranged in the movable box body; the fire source apparatus is configured to apply a fire source to combust a cable, the temperature measurement apparatus is configured to monitor temperature data of the cable, the gas measurement apparatus monitors and acquires gas component data of gases generated when the cable combusts, and the soot and gas purification apparatus is communicated with the top of the movable box body.
[0006] Although the test platform can reproduce a cable fire development process to a 1
N34P5LU 02.09.2022 certain extent, the platform only realizes the most ideal and basic cable fire scenario simulation without considering the temperature and humidity in the cable trench, the fire 0° performance of the cover plate of the cable trench and the ventilation in the cable trench effectively, which, none other than, important influence factors that affect the cable trench fire development or important indexes that reflect features of the cable trench fire. Moreover, the cover plate of the cable trench is an important part of the cable trench, and its structural stability is an important parameter in a fire protection design of the cable trench. Therefore, to design a system and method for simulating a fire of a cable trench and measuring the stability of a cover plate structure has great significance in the field.
[0007] In order to solve the above-mentioned technical problems, the invention provides a system and method for simulating a fire of a cable trench and measuring the stability of a cover plate structure.
[0008] The technical solution adopted by the invention is as follows:
[0009] a system for simulating a fire of a cable trench and measuring the stability of a cover plate structure includes a cable trench body, a cover plate bracket, a support frame, a cable carrier, a combustion apparatus, water spray apparatuses and a blowing apparatus, where the cable trench body includes an inner cavity composed of a bottom plate, a front side plate, a rear side plate and a concrete cover plate, the width and height dimensions of the cross section of the inner cavity are adjustable, the outer side surface of the concrete cover plate is connected to a linear displacement sensor, a strain gage is arranged in the concrete cover plate, thermocouples are uniformly distributed on the inner side surface of the concrete cover plate, and a heating plate is fixed to the inner wall of the rear side plate; the cover plate bracket is arranged in the cable trench body for supporting the concrete cover plate, and the cover plate bracket is provided with an aerosol fire extinguisher movable in position; the support frame is arranged below the cable trench body for supporting the cable trench body; the cable carrier is arranged in the inner cavity of the cable trench body and comprises a support plate frame and several vertically and horizontally arranged cable cleats slidably arranged on the support plate frame, the cable cleats are used for installing and fixing cables with different diameters, separation distances between adjacent two rows and two columns of cable cleats are adjustable, and a weighing apparatus is fixed to the bottom surface of the support plate frame: the combustion apparatus is arranged below the cable carrier for igniting the cables, and an installation position thereof is adjustable; the water spray apparatuses are arranged at two ends ,
N34P5LU 02.09.2022 of the inner cavity of the cable trench body for controlling humidity of the inner cavity of the cable trench body; and the blowing apparatus is connected to one end of the cable trench body | 03005 for introducing fresh air to the inner cavity of the cable trench body.
[0010] Further, the cable trench body further includes a bottom frame and a columns, the bottom frame being welded to the upper surface of the bottom plate and formed by connecting two vertical slide rails and two horizontal slide rails, the vertical slide rails and the horizontal slide rails being respectively provided with vertical chutes and horizontal chutes along length directions thereof, the vertical chutes and horizontal chutes being communicated, the lower ends of the columns being connected in the chutes of the bottom frame, the side surfaces of the columns being provided with slots, two ends of the front side plate and the rear side plate being inserted onto a corresponding pair of columns, and the front side plate and the rear side plate both being formed by successively assembling several unit plates of concave-convex structures.
[0011] Further, the cover plate bracket includes a rectangular top frame and four telescopic support legs, the lower ends of the telescopic support legs being supported on the bottom plate of the cable trench body, and the rectangular top frame being supported on the lower surface of the concrete cover plate; and the horizontal slide rails are respectively connected between the telescopic support legs at two ends, one vertical slide rail being connected between two horizontal slide rails, the vertical slide rail being slidably connected to a hook, and the aerosol fire extinguisher being suspended on the hook. :
[0012] Further, several slide rails are paved on the top surface of the support plate frame along a width direction thereof, each of the slide rails being provided with chutes opened in the front surface and the side surface; each of the cable cleats comprises a cable clamp, a support rod and a lock nut, the bottom of the cable clamp being connected to the support rod, the lower end of the support rod being provided with a limiting block matched with the chute, the limiting block being provided with a through hole, the limiting block of the support rod being located in the chute of the horizontal slide rail, and the lock nut penetrating the left and right openings of the chute and the through hole in the limiting block of the support rod and being connected to a nut.
[0013] Further, the cable clamp includes a lower arc-shaped plate and an upper arc-shaped plate, the lower arc-shaped plate being arranged with an upward opening, two ends of the lower arc-shaped plate being symmetrically provided with a circumferential arc-shaped groove and an axial arc-shaped groove, the axial arc-shaped groove and the circumferential arc-shaped groove being communicated, the axial arc-shaped groove being connected to a 3
NN
N34PSLU 02.09.2022 limiting bolt penetrating through the circumferential arc-shaped groove; and the upper arc-shaped plate being arranged with a downward opening, and two ends of the upper 09005 arc-shaped plate respectively penetrating through the circumferential arc-shaped groove of the upper arc-shaped plate being connected to the limiting block.
[0014] Further, each of the water spray apparatuses includes water spray nozzles, a water supply pipe and a water supply system, the water spray nozzles being respectively arranged at four corners of the bottom plate of the cable trench body, jet orifices of the water spray nozzles facing the cable carrier obliquely upward, the bottoms of the water spray nozzles being connected to the water supply pipe, one end of the water supply pipe being connected to the water supply system, the water supply system comprising a water tank and a water pump, and an outlet of the water pump being provided with a flow controller.
[0015] A method for researching influence of a temperature and humidity in the cable trench on the cover plate structure of the cable trench by utilizing the above-mentioned any one system for simulating a fire of a cable trench and measuring the stability of a cover plate structure includes the following steps:
[0016] D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench;
[0017] © setting the temperature and humidity in the cable trench;
[0018] © starting to record data of an electronic balance, a strain gauge, thermocouples and a linear displacement sensor;
[0019] @ igniting the cables through a combustion apparatus;
[0020] © stopping the recording after the cables are combusted completely or a top plate collapses; and
[0021] © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate.
[0022] A method for researching changes of a cover plate of a cable trench under circumstances of different weight loads by utilizing the above-mentioned any one system for simulating a fire of a cable trench and measuring the stability of a cover plate structure includes the following steps:
[0023] D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench;
[0024] © setting a load weight on the cover plate of the cable trench;
[0025] @ starting to record data of a weighing apparatus, a strain gauge, 4
N34P5LU 02.09.2022 thermocouples and a linear displacement sensor;
[0026] @ igniting the cables through a combustion apparatus; 17199005
[0027] ® stopping the recording after the cables are combusted completely or a top plate collapses; and
[0028] © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate.
[0029] A method for researching influence of different positions of aerosol fire-extinguishing agents on a cover plate structure of a cable trench by utilizing the above-mentioned any one system for simulating a fire of a cable trench and measuring the stability of a cover plate structure includes the following steps:
[0030] D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench;
[0031] @) installing aerosol fire extinguishers on the cover plate bracket;
[0032] © starting to record data of a weighing apparatus, a strain gauge, thermocouples and a linear displacement sensor;
[0033] @ igniting the cables through a combustion apparatus;
[0034] ® stopping the recording after the cables are combusted completely or a top plate collapses; and
[0035] © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate.
[0036] A method for researching changes of a cover plate of a cable trench under a vertical ventilation circumstance by utilizing the above-mentioned any one system for simulating a fire of a cable trench and measuring the stability of a cover plate structure includes the following steps:
[0037] ©) setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench;
[0038] @ starting a blowing apparatus in the cable trench, and setting a certain air speed;
[0039] © starting to record data of a weighing apparatus, a strain gauge, thermocouples and a linear displacement sensor;
[0040] @ igniting the cables through a combustion apparatus;
[0041] ® stopping the recording after the cables are combusted completely or a top plate collapses; and
N
N34P5LU 02.09.2022
[0042] © analyzing combustion rates of the cables, a deformation quantity of the 403005 cover plate and a temperature field of the cover plate.
[0043] The invention has the following beneficial effects:
[0044] 1. The invention can simulate the dimensions of the inner cavity and the cover plate of the actual cable trench, and the height of the cable trench is adjustable, so that the invention can perform fire simulation on the cable trenches of different dimensions.
[0045] 2. The cover plate of the cable trench of the invention is provided with the thermocouples, the strain gauge and displacement meters, to record the temperatures, the strains and the displacements of different positions of the concrete cover plate in the entire ignition process when the cable trench is on fire, thereby providing the basis for subsequently researching temperature resistance and structural stability of the fire cover plate of the cable trench.
[0046] 3. The cover plate of the cable trench of the invention can bear different loads, the combustion rates of the cables and influence on the stability of the cover plate structure of the cable trench under different load conditions can be researched, thereby providing a reference to a fire protection design of the cable trench.
[0047] 4. The cable carrier of a combustion module can support cables arranged at different densities, and the front and back positions of the combustion apparatus are adjustable, so that the cables arranged in different modes can be ignited. The ignition positions can be adjusted flexibly, the combustion rates of the cables and influence on the stability of the cover plate structure of the cable trench under different cable ignition conditions can be researched, thereby providing a reference to a fire protection design of the cable trench.
[0048] 5. Through the heating plate and the water spray apparatuses on the rear side plate, the combustion rates of the cables and influence on the stability of the cover plate structure of the cable trench under conditions of initial temperature and humidity in the cable trench can be researched, thereby providing a reference to a fire protection design of the cable trench.
[0049] 6. The invention simulates the ventilation requirements in the cable trench through the blowing apparatus, and the combustion rates of the cables and influence on the stability of the cover plate structure of the cable trench under different ventilation conditions in the cable trench can be researched by changing parameter setting of a blower, thereby providing a reference to a fire protection design of the cable trench. 6
N34PSLU 02.09.2022
[0050] FIG. 1 is a schematic structural diagram of a system according to the invention 09005
[0051] FIG. 2 is a breakdown schematic diagram of a cable trench body and a support frame thereof in FIG. 1.
[0052] FIG. 3 is a schematic diagram of an assembly structure of unit plates of a front side plate and a rear side plate in FIG. 2.
[0053] FIG. 4 is a schematic structural diagram of a cover plate in FIG. 1.
[0054] FIG. 5 is a schematic structural diagram of a displacement meter in FIG. 1.
[0055] FIG. 6 is a schematic structural diagram of a cover plate bracket in FIG. 1.
[0056] FIG. 7 is a schematic structural diagram of a cable carrier in FIG. 1.
[0057] FIG. 8 is an enlarged schematic structural diagram of the cable cleats in FIG. 7.
[0058] FIG. 9 is a schematic structural diagram of a combustion apparatus in the FIG. 1.
[0059] FIG. 10 is a schematic structural diagram of a water spray apparatus in FIG. 1.
[0060] FIG. 11 is a schematic structural diagram of a blowing apparatus in FIG. 1.
[0061] Further description of the invention will be made below in combination with specific embodiments for the convenience of understanding of the invention, and is not limited thereto.
[0062] Embodiment 1
[0063] Referring to FIG. 1, the embodiment provides a system for simulating a fire of a cable trench and measuring the stability of a cover plate structure, mainly including a cable trench body 1, a cover plate bracket 2, a support frame 3, a cable carrier 4, a combustion apparatus 5, water spray apparatuses 6 and a blowing apparatus 7. ;
[0064] Referring to FIG. 2 to FIG. 4, the cable trench body 1 includes a steel bottom plate 11, a bottom frame 12, columns 13, a front side plate 14, a rear side plate 15 and a concrete cover plate 16.
[0065] The bottom plate 11 is a rectangular plate; the bottom frame 12 is a rectangular frame welded to the bottom plate and is formed by connecting two vertical slide rails and two horizontal slide rails, the vertical slide rails and the horizontal slide rails being respectively provided with vertical chutes and horizontal chutes along length directions thereof, and the vertical chutes and horizontal chutes being communicated.
[0066] There are four columns 13, and the lower ends of the columns are connected in 7
N34P5LU 02.09.2022 the chutes of the bottom frame 12 through slide blocks, so that the columns can move either along the vertical slide rails or the horizontal slide rails. After the front side plate and the rear 09005 side plate are respectively installed through a pair of columns, the separation distance between the front side plate and the rear side plate can be adjusted, so that the width dimension of the cable trench body is adjustable. After adjustment in position, the cable trench is locked by a set screw.
[0067] As shown in FIG. 3, the front side plate 14 and the rear side plate 15 both are formed by successively assembling a plurality of unit plates of concave-convex structures, so that the heights of the front side plate and the rear side plate can be adjusted by assembling different quantities of unit plates, and therefore, the height dimension of the cable trench body is adjustable.
[0068] Two ends of the front side plate 14 and the rear side plate 15 are respectively inserted onto the columns 13. In specific implementation, the columns are provided with slots, and widths of the slots fit thicknesses of the front side plate and the rear side plate. By replacing the unit plates at different lengths, the length of the cable trench body is adjustable.
[0069] In order to simulate the initial temperatures in different experiments, two heating plates 151 with same specification are fixed at an equal interval to the rear side plate of the cable trench body.
[0070] The front side plate 14 is a fireproof glass panel, so that staff can master the real-time working condition of the cable trench body.
[0071] Two sides of the lower surface of the concrete cover plate 16 are spliced with the unit plates on the uppermost sides of the front side plate 14 and the rear side plate 15. In the specific implementation, two sides of the lower surface of the concrete cover plate 16 are provided with slots, and the widths of the slots fit the thicknesses of the front side plate and the rear side plate.
[0072] Preferably, the upper surface of the concrete cover plate 16 are provided with two grooves where heavy objects with different weights can be placed, so that different cover plate loads can be simulated according to experimental requirements.
[0073] Referring to FIG. 4, the concrete cover plate 16 can be prepared by adjusting different concrete proportions according to the experimental requirements. Before pouring in preparation, BX120-3AA strain gauges 161 are paved in a concrete prefabricated slab, and the
BX120-3AA strain gauges 161 are respectively located around the cover plate and in a position of a center line for testing a strain condition of the cover plate.
[0074] After the concrete cover plate is prefabricated, K-type armored thermocouples 8
N34P5LU 02.09.2022 162 are fixed to the lower surface thereof to monitor the real-time temperature of the cover plate during the fire. Several thermocouples 162 are uniformly distributed on the concrete 9999 cover plate 16. For example, in the embodiment, the thermocouples 162 are distributed in 8 rows and 16 columns.
[0075] Referring to FIG. 5, three positions: two ends and the center of the concrete cover plate 16 are provided with three LTC-M-0600-S linear displacement meters 163 which are fixed right above the concrete cover plate 16 through a steel pipe support frame 164 for testing a displacement condition of the concrete cover plate.
[0076] Referring to FIG. 6, the cover plate bracket 2 includes a rectangular top frame 21 and telescopic support legs 22 at corners of the lower side thereof. The lower ends of the telescopic support legs 22 are supported on the bottom plate 11 of the cable trench body, and the rectangular top frame 21 is supported on the lower surface of the concrete cover plate 16.
[0077] The horizontal slide rails 23 are respectively connected between the telescopic support legs 22 at two ends, one vertical slide rail 24 is connected between two horizontal slide rails 23, the vertical slide rail 24 is slidably connected to a hook 25, an aerosol fire extinguisher 8 is suspended on the hook 25, and the vertical slide rail 24 and the horizontal slide rails 23 are assembled through chutes of the slide blocks, so that the vertical and horizontal positions of the aerosol fire extinguisher 8 can be changed. In the specific implementation, horizontal chutes can be formed in the horizontal slide rails 23, two ends of the horizontal slide rail 23 are provided with a horizontal slide block, and the horizontal slide block is slidably matched with the horizontal chute. The vertical slide rail 24 is provided with a vertical chute, the vertical chute is slidably connected to the vertical slide block, and the upper end of the hook 25 is fixed to the vertical slide block.
[0078] The support frame 3 includes a support panel 31, the plan view size of which is equal to that of the bottom plate 11 of the cable trench body 1 and four support columns 32 connecting the support panel 31, and the support frame 3 plays a stable supporting role to the cable trench body 1. In the specific implementation, the four columns 13 of the cable trench body 1 are inserted onto the four support columns 32 of the support frame 3, and the four support columns 32 are made from steel pipes.
[0079] Referring to FIG. 7, the cable carrier 4 is installed in the cable trench body 1 and includes a support plate frame, horizontal slide rails 44 and cable cleats 46.
[0080] The support plate frame includes an upper rectangular plate 41, a lower rectangular plate 42 and several support plates 43 connected thereamong, where there are a plurality of horizontal slide rails 44 uniformly arranged along the width direction of the upper 9
N34P5LU 02.09.2022 rectangular plate 41, the horizontal slide rails 44 are provided with chutes, and the upper side and the left and right sides of the chutes are provided with openings; the support plate 45177008 penetrates through the bottom plate 11 of the cable trench body 1 and is connected to the lower rectangular plate 42, and a weighing apparatus 45 is fixed to the bottom surface of the lower rectangular plate 42. In the embodiment, an industrial balance is used as the weighing apparatus. The weighing apparatus 45 is freely supported on the support panel 31 for monitoring the loss amount of the cable after ignition.
[0081] Referring to FIG. 8, each of the cable cleats 46 includes a cable clamp, a support rod 47 and a lock bolt 48, where the cable clamp includes a lower arc-shaped plate 461 and an upper arc-shaped plate 462, the lower arc-shaped plate 461 being arranged with an upward opening, two ends of the lower arc-shaped plate being symmetrically provided with a circumferential arc-shaped groove and an axial arc-shaped groove matched with the upper arc-shaped plate 462 in width. The axial arc-shaped groove and the circumferential arc-shaped groove are communicated, and the axial arc-shaped groove is connected to a limiting bolt 463 penetrating through the circumferential arc-shaped groove. The upper arc-shaped plate 462 is arranged with a downward opening, the width of the middle position of the upper arc-shaped plate is larger than the widths of two end sections, and two ends of the upper arc-shaped plate 462 respectively penetrate through the circumferential arc-shaped grooves of the upper arc-shaped plate 462 and are connected to the limiting block 4621.
[0082] During use, the cable stretches into the cable clamp from the side surface, and the upper arc-shaped plate 462 and the lower arc-shaped plate 461 compress and lock the cable through the limiting bolt 463 and a nut. The bottom of the lower arc-shaped plate 461 is fixedly connected to a support rod 47, the lower end of the support rod 47 is provided with a limiting block, and the limiting block is internally provided with a through hole. The cable cleat 46 is slidably installed on the horizontal slide rail 44 through the support rod 47, the limiting block of the support rod 47 is located in the chute of the horizontal slide rail 44, and the locking bolt 48 penetrates through the left and right openings of the chute and the through hole in the limiting block of the support rod 47, and is connected to the nut.
[0083] According to the above-mentioned structure of the cable carrier 4, corresponding quantities of horizontal slide rails can be arranged according to the length of the cable trench body, the cable cleats can be installed and fixed on each of the horizontal slide rails according to the quantity of the cables and the separation distances, and the cable cleats are suitable for installing and fixing the cables with different diameters.
[0084] When the cable carrier 4 and the cable trench body 1 are assembled, the
N34P5LU 02.09.2022 weighing apparatus 45 is placed at an appointed position of the bottom plate of the cable 00s trench body.
[0085] As shown in FIG. 9, the combustion apparatus 5 includes supporting columns 51, a combustor installation groove body 52 and a combustor 53.
[0086] There are two vertically arranged supporting columns 51. Each of the supporting columns includes a lower pipe and an upper pipe arranged in a sleeved manner up and down. The upper pipe adjusted to an appointed height is locked through a radial bolt. The combustor installation groove body 52 is connected to the upper ends of the two supporting columns 51, the separation distance between the two supporting columns 51 is larger than the width of the support plate frame, and the combustor 53 is a propane combustor placed in the combustor installation groove body 52 and can be adjusted in position along the combustor installation groove body.
[0087] When the combustor apparatus is installed, the lower pipe of each of the supporting columns 51 penetrating through the bottom plate 11 of the cable trench body is supported on the support panel 31, the inner end of the combustor installation groove body 52 penetrating through the rear side plate 15 of the cable trench body is connected to an air inlet pipe, and the air inlet pipe is connected to a steel cylinder.
[0088] As shown in FIG. 10, each of the water spray apparatuses 6 includes water spray nozzles 61, a water supply pipe 62 and a water supply system 63. The water spray nozzles 61 are respectively arranged at four corners of the bottom plate 11 of the cable trench body 1, jet orifices of the water spray nozzles 61 face the cable carrier 4 obliquely upward, the bottoms of the water spray nozzles 61 are connected to water supply branch pipes, and the water supply branch pipes penetrating through the bottom plate 11 are connected to the annular water supply pipe 62. One end of the annular water supply pipe 62 is connected to the water supply system 63 which includes a water tank, a water pump and a flow controller. The water spray apparatus 6 can simulate humidity in the cable trench and can adjust the simulated humidity in the cable trench by controlling the flow of the water pump through the flow controller.
[0089] As shown in FIG. 11, the blowing apparatus 7 includes a blower 71 and a flow equalizing box 72 connected to an air outlet thereof. The flow equalizing box 22 includes a box body and several rows of flow equalizing pipes fixed in an inner cavity of the flow equalizing box. The size of the inner cavity of the box body is adjustable, the box body is in butt joint with the cable trench body 1, and fresh air is fed into the cable trench body 1 through the flow equalizing pipes. 11
N34P5LU 02.09.2022
[0090] Overall installation steps of the system are as follows:
[0091] Ri: cables are fixed in the limiting bolts of the support plate frame according 09005 to the quantity, separation distance and height of the cables needed to be researched; the electronic balance is installed below the support plate frame to monitor the weight change of the cables in real time;
[0092] R2: the propane combustor is fixed as required below the cables and is connected to a gas cylinder through the air inlet pipe, and the propane combustor and the gas cylinder are jointly used as the fire source that ignites the cables;
[0093] R3: the dimension of the inner cavity of the cable trench is determined, including width and height of the cable trench;
[0094] R4: the heating plates are installed on the rear side plate of the cable trench and the water spray apparatuses are installed on the bottom plate, and the heating plates and the water spray apparatuses are jointly used for changing the environment temperature and the environment humidity in the cable trench;
[0095] RS: the concrete cover plate where the strain gauges are paved are placed on the upper side of the cable trench, and meanwhile, thermocouple measure points are arranged below the concrete cover plate, and the displacement meters are arranged above the concrete cover plate;
[0096] R6: several heavy objects are placed on the concrete cover plate according to conditions needed to be researched, to research influence of different loads on the cover plate of the cable trench;
[0097] R7: the aerosol fire extinguishers movable in position are installed on the cover plate bracket for researching response of the aerosol fire extinguishers in different positions during the fire of the cable trench;
[0098] RS: three positions: two ends and the center of the concrete cover plate are provided with the displacement meters for measuring a deformation condition of the top plate of the cable trench;
[0099] R9: the blowing apparatus is installed on one side of the cable trench for researching influence on the top plate structure of the cable trench under different vertical ventilation conditions.
[00100] It is to be noted that if it is only needed to research some part of function therein, it is unnecessary to start all assemblies, or it is able to research an influence effect of the cover plate of the cable trench subject to coupling factors. There are algorithms for main four functions below, and the functions can be also changed according to actual demands. 12
N34P5LU 02.09.2022
[00101] Embodiment 2
[00102] The method for researching influence of a temperature and humidity in the 0° cable trench on the cover plate structure of the cable trench by utilizing the system for measuring a temperature and structural stability of a fire cover plate of a cable trench in the embodiment 1 includes the following steps:
[00103] (D the number, the separation distances and the heights of the cables are set according to a research demand, and a dimension of an inner cavity of the cable trench is determined;
[00104] @ the temperature and humidity in the cable trench are set;
[00105] © it is started to record data of an electronic balance, strain gauges, thermocouples and displacement meters;
[00106] @ the cables are ignited through a combustion apparatus;
[00107] ® recording is stopped after the cables are combusted completely or a top plate collapses; and
[00108] © combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate are analyzed, thereby providing a reference to a fire protection design of the cable trench.
[00109] Embodiment 3
[00110] The method for researching changes of the cover plate of the cable trench under circumstances of different weight loads by utilizing the system for measuring a temperature and structural stability of a fire cover plate of a cable trench in the embodiment 1 includes the following steps:
[00111] (D the number, the separation distances and the heights of the cables are set according to a research demand, and a dimension of an inner cavity of the cable trench is determined;
[00112] @ a load weight on the cover plate of the cable trench is set;
[00113] © it is started to record data of an electronic balance, strain gauges, thermocouples and displacement meters;
[00114] @ the cables are ignited through a combustion apparatus:
[00115] ® recording is stopped after the cables are combusted completely or a top plate collapses; and
[00116] © combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate are analyzed, thereby providing a reference to a fire 13
N34P5LU 02.09.2022 protection design of the cable trench.
[00117] Embodiment 4 HUT0005
[00118] The method for researching influence of different positions of aerosol fire-extinguishing agents on the cover plate structure of the cable trench by utilizing the system for measuring a temperature and structural stability of a fire cover plate of a cable trench in the embodiment 1 includes the following steps:
[00119] the number, the separation distances and the heights of the cables are set according to a research demand, and a dimension of an inner cavity of the cable trench is determined;
[00120] @ the aerosol fire extinguishers are installed in some positions on the cover plate bracket;
[00121] © it is started to record data of an electronic balance, strain gauges, thermocouples and displacement meters;
[00122] @ the cables are ignited through a combustion apparatus;
[00123] ® recording is stopped after the cables are combusted completely or a top plate collapses; and
[00124] ® combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate are analyzed, thereby providing a reference to a fire protection design of the cable trench.
[00125] Embodiment 5
[00126] The method for researching changes of the cover plate of the cable trench under a vertical ventilation circumstance by utilizing the system for measuring a temperature and structural stability of a fire cover plate of a cable trench in the embodiment 1 includes the following steps:
[00127] (D) the number, the separation distances and the heights of the cables are set according to a research demand, and a dimension of an inner cavity of the cable trench is determined;
[00128] © a blowing apparatus is started in the cable trench, and a certain air speed is set;
[00129] © it is started to record data of an electronic balance, strain gauges, thermocouples and displacement meters;
[00130] @ the cables are ignited through a combustion apparatus;
[00131] ® recording is stopped after the cables are combusted completely or a top 14
N34P5LU 02.09.2022 plate collapses; and
[00132] @ combustion rates of the cables, a deformation quantity of the cover plate 999 and a temperature field of the cover plate are analyzed, thereby providing a reference to a fire protection design of the cable trench.
[00133] The above examples are merely the preferred embodiments of the invention. It should be noted that improvements and embellishments shall be made within the protection range of the invention to those skilled in the technical field without departing the principle of the invention.
Claims (10)
1. A system for simulating a fire of a cable trench and measuring the stability of a cover plate structure, comprising a cable trench body, a cover plate bracket, a support frame, a cable carrier, a combustion apparatus, water spray apparatuses and a blowing apparatus, wherein the cable trench body comprises an inner cavity composed of a bottom plate, a front side plate, a rear side plate and a concrete cover plate, the width and height dimensions of the cross section of the inner cavity are adjustable, the outer side surface of the concrete cover plate is connected to a linear displacement sensor, a strain gage is arranged in the concrete cover plate, thermocouples are uniformly distributed on the inner side surface of the concrete cover plate, and a heating plate is fixed to the inner wall of the rear side plate; the cover plate bracket is arranged in the cable trench body for supporting the concrete cover plate, and the cover plate bracket is provided with an aerosol fire extinguisher movable in position; the support frame is arranged below the cable trench body for supporting the cable trench body; the cable carrier is arranged in the inner cavity of the cable trench body and comprises a support plate frame and several vertically and horizontally arranged cable cleats slidably arranged on the support plate frame, the cable cleats are used for installing and fixing cables with different diameters, separation distances between adjacent two rows and two columns of cable cleats are adjustable, and a weighing apparatus is fixed to the bottom surface of the support plate frame; the combustion apparatus is arranged below the cable carrier for igniting the cables, and an installation position thereof is adjustable; the water spray apparatuses are arranged at two ends of the inner cavity of the cable trench body for controlling humidity of the inner cavity of the cable trench body; and the blowing apparatus is connected to one end of the cable trench body for introducing fresh air to the inner cavity of the cable trench body.
2. The system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to Claim 1, wherein the cable trench body further comprises a bottom frame and a columns, the bottom frame being welded to the upper surface of the bottom plate and formed by connecting two vertical slide rails and two horizontal slide rails, the vertical slide rails and the horizontal slide rails being 16
N34P5LU 02.09.2022 respectively provided with vertical chutes and horizontal chutes along length directions thereof, the vertical chutes and horizontal chutes being communicated, the lower ends of HU103005 the columns being connected in the chutes of the bottom frame, the side surfaces of the columns being provided with slots, two ends of the front side plate and the rear side plate being inserted onto a corresponding pair of columns, and the front side plate and the rear side plate both being formed by successively assembling several unit plates of concave-convex structures.
3. The system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to Claim 1, wherein the cover plate bracket comprises a rectangular top frame and four telescopic support legs, the lower ends of the telescopic support legs being supported on the bottom plate of the cable trench body, and the rectangular top frame being supported on the lower surface of the concrete cover plate; and the horizontal slide rails are respectively connected between the telescopic support legs at two ends, one vertical slide rail being connected between two horizontal slide rails, the vertical slide rail being slidably connected to a hook, and the aerosol fire extinguisher being suspended on the hook.
4. The system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to Claim 1, wherein several slide rails are paved on the top surface of the support plate frame along a width direction thereof, each of the slide rails being provided with chutes opened in the front surface and the side surface; each of the cable cleats comprises a cable clamp, a support rod and a lock nut, the bottom of the cable clamp being connected to the support rod, the lower end of the support rod being provided with a limiting block matched with the chute, the limiting block being provided with a through hole, the limiting block of the support rod being located in the chute of the horizontal slide rail, and the lock nut penetrating the left and right openings of the chute and the through hole in the limiting block of the support rod and being connected to a nut.
5. The system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to Claim 4, wherein the cable clamp comprises a lower arc-shaped plate and an upper arc-shaped plate, the lower arc-shaped plate being arranged with an upward opening, two ends of the lower arc-shaped plate being symmetrically provided with a circumferential arc-shaped groove and an axial arc-shaped groove, the axial arc-shaped groove and the circumferential arc-shaped groove being communicated, the axial arc-shaped groove being connected to a limiting bolt penetrating through the circumferential arc-shaped groove; and the upper arc-shaped plate being arranged with a 17
N34P5LU 02.09.2022 downward opening, and two ends of the upper arc-shaped plate respectively penetrating through the circumferential arc-shaped groove of the upper arc-shaped plate being HUT0005 connected with the limiting block.
6. The system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to Claim 1, wherein each of the water spray apparatuses comprises water spray nozzles, a water supply pipe and a water supply system, the water spray nozzles being respectively arranged at four corners of the bottom plate of the cable trench body, jet orifices of the water spray nozzles facing the cable carrier obliquely upward, the bottoms of the water spray nozzles being connected to the water supply pipe, one end of the water supply pipe being connected to the water supply system, the water supply system comprising a water tank and a water pump, and an outlet of the water pump being provided with a flow controller.
7. A method for researching influence of a temperature and humidity in a cable trench on a cover plate structure of a cable trench by utilizing the system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to any one of Claims 1-6, comprising the following steps: D setting the number, separation distances and heights of cables according to a research demand, and determining a dimension of an inner cavity of the cable trench; © setting the temperature and humidity in the cable trench; © starting to record data of an electronic balance, a strain gauge, thermocouples and a linear displacement sensor; @ igniting the cables through a combustion apparatus; ® stopping the recording after the cables are combusted completely or a top plate collapses; and © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate. oo
8. A method for researching changes of a cover plate of a cable trench under circumstances of different weight loads by utilizing the system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to any one of Claims 1-6, comprising the following steps: (D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench; © setting a load weight on the cover plate of the cable trench; 18
N34P5LU 02.09.2022 © starting to record data of a weighing apparatus, a strain gauge, thermocouples and a linear displacement sensor; 10106008 @ igniting the cables through a combustion apparatus; © stopping the recording after the cables are combusted completely or a top plate collapses; and © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate.
9. A method for researching influence of different positions of aerosol fire-extinguishing agents on a cover plate structure of a cable trench by utilizing the system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to any one of Claims 1-6, comprising the following steps: D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench; ©) installing aerosol fire extinguishers on the cover plate bracket; © starting to record data of a weighing apparatus, a strain gauge, thermocouples and a linear displacement sensor; @) igniting the cables through a combustion apparatus; ® stopping the recording after the cables are combusted completely or a top plate collapses; and © analyzing combustion rates of the cables, a deformation quantity of the cover plate and a temperature field of the cover plate.
10. A method for researching changes of a cover plate of a cable trench under a vertical ventilation circumstance by utilizing the system for simulating a fire of a cable trench and measuring the stability of a cover plate structure according to any one of Claims 1-6, comprising the following steps: (D setting the number, separation distances and heights of the cables according to a research demand, and determining a dimension of an inner cavity of the cable trench; © starting a blowing apparatus in the cable trench, and setting a certain air speed; ® starting to record data of a weighing apparatus, a strain gauge, thermocouples and a linear displacement sensor; @ igniting the cables through a combustion apparatus; ® stopping the recording after the cables are combusted completely or a top plate collapses; and 19
N34P5LU 02.09.2022 Jesotv 020092022 © analyzing combustion rates of the cables, a deformation quantity of the cover plate LU103005 and a temperature field of the cover plate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210586223.5A CN115112398A (en) | 2022-05-27 | 2022-05-27 | Cable trench fire simulation and cover plate structure stability measurement system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU103005B1 true LU103005B1 (en) | 2023-03-20 |
Family
ID=83325798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU103005A LU103005B1 (en) | 2022-05-27 | 2022-09-13 | System and method for simulating fire of cable trench and measuring stability of cover plate structure |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115112398A (en) |
| LU (1) | LU103005B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818980B (en) * | 2023-08-29 | 2023-11-03 | 佛山市劲能电力工程有限公司 | Power cable performance detection device and detection method thereof |
-
2022
- 2022-05-27 CN CN202210586223.5A patent/CN115112398A/en active Pending
- 2022-09-13 LU LU103005A patent/LU103005B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN115112398A (en) | 2022-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100587461C (en) | Tunnel lining component high-temperature mechanical property testing system | |
| LU103005B1 (en) | System and method for simulating fire of cable trench and measuring stability of cover plate structure | |
| CN104215653B (en) | System for testing fire resistance of reinforced concrete plate under effect of boundary restriction by utilizing jack | |
| CN100587462C (en) | High-temperature mechanical property testing system of annular tunnel lining structure system | |
| CN204228643U (en) | Fire-resistance test system is retrained in continuous-reinforced slab face | |
| Li et al. | Experimental and computational fluid dynamics study of separation gap effect on gas explosion mitigation for methane storage tanks | |
| CN101477108B (en) | Peripheral support full-size steel reinforced concrete two-way slab fire-resistant tester and its implementing method | |
| CN109632793A (en) | Experiment porch and method for the research of cable tunnel fire temperature field simulated behavior | |
| CN101477109B (en) | Column support full-size steel reinforced concrete two-way slab fire-resistant tester and implementing method thereof | |
| CN109003501B (en) | Fire simulation experiment device and method for researching building fireproof space | |
| CN113823167B (en) | Cable tunnel fire simulation system | |
| CN106198620B (en) | A kind of structural elements temperature rise experimental provision and application method | |
| CN113156045A (en) | Visual hydrogen explosion ripple spark arrester back-fire relief capability test and detection protector | |
| CN117451917A (en) | Multi-level cable fire spreading and melting drop fire test platform and method | |
| CN111175436A (en) | Experimental device for be used for simulating slot fire and put out a fire | |
| CN108195994B (en) | Electric shaft baffle fire resistance testing platform | |
| CN111397939B (en) | Test method for evaluating fire extinguishing performance of comprehensive pipe rack fire extinguishing system | |
| CN209927757U (en) | Fire resistance test device for reinforced concrete member | |
| RU2451919C1 (en) | Icing condition stimulator used in aircraft turbine engine bench tests in heat chambers with piping attached | |
| CN114061996B (en) | Device for simulating longitudinal ventilation smoke control effect of highway tunnel fire and smoke control method | |
| CN109030233A (en) | A kind of anti-fall performance test apparatus that collapses of high temperature | |
| CN204008516U (en) | The anti-fiery pilot system of lifting jack boundary constraint armoured concrete slab | |
| CN209215121U (en) | A kind of anti-fall performance test apparatus that collapses of high temperature | |
| CN201335780Y (en) | Fire resistance test device for post support full-scale two-way reinforced concrete slab | |
| Liu et al. | Experimental investigation of mass loss rate and spatial temperature distribution of the pool fire in tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20230320 |