Testing device for simulating effect of fire-fighting water jet on concrete in fire disaster
By designing a test device that simulates fire water injection in a fire, the problem of the inability to accurately simulate the effect of fire water injection on concrete in the prior art is solved, real reaction and accurate testing in the calcined concrete state are achieved, and testing errors are reduced.
Patent Information
- Application Number
- CN202422298596.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The prior art cannot simulate the actual effect of fire-fighting water in the state of calcined concrete, resulting in large errors in the test results.
A test device that simulates the effect of fire water spray on concrete in a fire is designed, including a high-temperature furnace, a water spray device and a phase change cooling system. It can conduct water spray tests when the concrete is calcined, simulate the actual fire situation through a water spray device in six directions, and maintain a stable test environment using a phase change cooling device.
The real reaction in the calcined concrete state is achieved, which can accurately simulate the effect of fire water on concrete in fire, reduce test errors, and discharge water vapor in time to maintain the stable pressure in the test box.
Smart Images
Figure CN223166746U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of civil engineering, and particularly relates to a test device for simulating the action of fire fighting water spraying on concrete in a fire. Background Technique
[0002] Fires can cause varying degrees of damage to concrete-structured buildings. When a fire occurs, fire fighting water spraying is usually used to extinguish the fire. The damage mechanism of fire to concrete has been basically explored by people, and the research on the influence of fire fighting water spraying on the performance of concrete in a calcined state has also attracted the attention of scientific research and engineering technicians, but there are not many current research results. The patent document with the application number 2024103163220 discloses a calculation method for the flexural bearing capacity of reinforced concrete beams under different cooling methods. Through numerical simulation to obtain the temperature field of the reinforced concrete beam and through experiments to obtain the true heating curve in the furnace and a series of processes, the flexural performance of the reinforced concrete beam under the water spraying cooling and natural cooling methods is obtained.
[0003] According to the currently disclosed research results, the current research on the influence of fire fighting water spraying on fire-damaged concrete is to first place the concrete component in a high-temperature furnace, heat and calcine it according to a certain heating system and then take it out and place it in the air, and spray the surface of the concrete with fire fighting water. That is, when the fire fighting water is sprayed, the concrete is no longer in the calcined state. However, in actual fires, the fire fighting water is sprayed when the concrete is in the calcined state. That is, the existing research methods cannot fully simulate the fire situation, and there are large errors in the test results. Content of the Utility Model
[0004] The purpose of the utility model is to provide a test device for simulating the action of fire fighting water spraying on concrete in a fire, which realizes the spraying of water on the concrete in the calcined state and can truly reflect the action of fire fighting water on the concrete in the fire.
[0005] The purpose of the utility model is realized as follows: A test device for simulating the action of fire fighting water spraying on concrete in a fire includes a high-temperature furnace. A first support for supporting a fire fighting simulation device is arranged in the high-temperature furnace. The fire fighting simulation device includes a test box and six water spraying devices. The test box includes a box cover and a box body with an open top. A second support for placing concrete test blocks is arranged in the box body. The bottom of the box body is communicated with a drain steam pipe. The six water spraying devices are used to spray in the six directions of front, back, left, right, up and down of the concrete test block respectively. The water spraying device includes a water tank and a pressure gauge. The water outlet end of the water tank is communicated with the water inlet end of a water pump. The water outlet end of the water pump is communicated with the test box through a conduit. A valve is arranged on the water pump. The pressure gauge is used to detect the water pressure at the water outlet end of the water pump. A phase change cooling device is arranged outside the conduit to cool the flowing water.
[0006] When the utility model is in use, place the concrete test block on the second support and cover the box lid; place the test box on the first support and confirm whether the conduit is in communication with the test box; start the high-temperature furnace to heat to the target temperature; start the water pump, and adjust the valve to make the water pressure reach the target pressure, and the six water jet devices spray water on the front, back, left, right, up and down six directions of the concrete test block respectively; during the test, the phase change cooling device uses the phase change material inside to effectively absorb or release heat in a high-temperature environment and stabilize the temperature of the test environment; after the test reaches the target time, stop the operation of the high-temperature furnace and the water pump, take out the concrete test block and test its performance. Compared with the prior art, the beneficial effects of the utility model are as follows: (1) Through this test device, water can be sprayed on concrete in a calcined state, which can truly reflect the effect of fire-fighting water on concrete in a fire; (2) This test device can simulate the influence of different pressure waters on the performance of concrete in a fire; (3) The water vapor generated by spraying water and heating the concrete can be discharged in time to ensure that there is no water accumulation and the pressure remains unchanged in the test box.
[0007] As a further improvement of the utility model, the box lid includes a hollow quadrangular pyramid with the bottom surface facing downwards, the box body includes five hollow quadrangular pyramids with the bottom surfaces all facing inwards, a number of water spray holes are evenly distributed at equal intervals on the bottom surfaces of the six hollow quadrangular pyramids, and threaded pipes are arranged at the vertices of the six hollow quadrangular pyramids.
[0008] As a further improvement of the utility model, fixing edge strips are arranged around the opening of the box body, fixing edge strips are arranged around the bottom of the box lid, and fixing holes are formed in the fixing edge strips for fasteners to pass through.
[0009] As a further improvement of the utility model, the first support is a cuboid frame structure, the first support includes a grid net, four columns are arranged on the lower side of the grid net, and a number of limiting rods are arranged around.
[0010] As a further improvement of the utility model, the test box, the drain steam pipe, the first support and the second support are all made of W70 tungsten copper.
[0011] As a further improvement of the utility model, the water tank, the water pump and the phase change cooling device are all placed on a steel table, and an exhaust fan is arranged on the steel table corresponding to between the high-temperature furnace and the phase change cooling device.
[0012] As a further improvement of the utility model, the exhaust fan is a duct-type industrial exhaust fan with a power of more than 750W, the water pump is a 0.25KW self-priming pump, the pressure gauge is a fire-fighting pressure gauge with a range of 0.0~1.6MPa, and the valve is a two-piece ball valve made of 304 stainless steel.
[0013] As a further improvement of the present utility model, the phase change cooling device is an inverted U-shaped hollow box. A liquid injection hole is provided at the top of the hollow box, and a hole cover is provided corresponding to the liquid injection hole. The hollow box is filled with a glycerol solution with a concentration of 50%.
[0014] As a further improvement of the present utility model, both the hollow box and the hole cover are made of 310S stainless steel.
[0015] As a further improvement of the present utility model, the high-temperature furnace includes a furnace door and a furnace body with an opening at the front side. A number of through holes are provided on the furnace body for the catheter and the steam drain pipe to pass through respectively, and the gaps between the through holes and the catheter and the steam drain pipe are sealed with aluminosilicate fiber cotton. Description of the Drawings
[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0017] Figure 2 It is a schematic diagram of the structure of the water injection device.
[0018] Figure 3 It is Figure 2 a schematic sectional view taken along line A-A in
[0019] Figure 4 a schematic diagram of the bottom of the box cover.
[0020] Figure 5 a schematic three-dimensional structure diagram of the box cover.
[0021] Figure 6 It is Figure 5 a schematic sectional view taken along line B-B in
[0022] Figure 7 a top view of the box body.
[0023] Figure 8 It is Figure 7 a schematic sectional view taken along line C-C in
[0024] Figure 9 a schematic three-dimensional structure diagram of the high-temperature furnace.
[0025] Figure 10 a schematic diagram of the structure of the first bracket.
[0026] Figure 11 a schematic diagram of the structure of the second bracket.
[0027] Among them, 1 is the furnace body, 2 is the furnace door, 3 is the first support, 4 is the drain steam pipe, 5 is the box body, 6 is the conduit, 7 is the exhaust fan, 8 is the phase change cooling device, 9 is the pressure gauge, 10 is the valve, 11 is the water pump, 12 is the water tank, 13 is the steel table, 14 is the water injection hole, 15 is the hole cover, 16 is the steel wire, 17 is the box cover, 18 is the second fixed side strip, 19 is the concrete test block, 20 is the second support, 21 is the water spray hole, 22 is the fixing hole, 23 is the internal threaded pipe, 24 is the drain steam hole, 25 is the first fixed side strip, 26 is the drain threaded pipe, 27 is the support column, 28 is the grid net, 29 is the limiting rod, 30 is the first through hole, 31 is the second through hole, 32 is the third through hole, 33 is the fourth through hole, 34 is the fifth through hole, 35 is the sixth through hole, 36 is the seventh through hole. Specific embodiments
[0028] As Figures 1-3 shown, it is a test device for simulating the action of fire fighting water spray on concrete in a fire, including a high-temperature furnace. A first support 3 is arranged in the high-temperature furnace to support the fire fighting simulation device. The fire fighting simulation device includes a test box and six water spray devices. The test box includes a box cover 17 and a box body 5 with an open top. A second support 20 is arranged in the box body 5 for placing the concrete test block 19. A drain steam hole 24 is opened at the bottom of the box body 5 and a drain threaded pipe 26 is arranged for communicating with the drain steam pipe 4. The six water spray devices are used for spraying in six directions of front, back, left, right, up and down of the concrete test block 19 respectively. The water spray device includes a water tank 12 and a pressure gauge 9. The water tank 12 is preferably made of 304 stainless steel plate into a cube structure and a water injection hole 14 is opened at the top. The water outlet end of the water tank 12 is communicated with the water inlet end of the water pump 11. The water outlet end of the water pump 11 is communicated with the test box through a conduit 6. External threads are arranged at both ends of the conduit 6. A valve 10 is arranged on the water pump 11. The pressure gauge 9 is used to detect the water pressure at the water outlet end of the water pump 11. A phase change cooling device 8 is arranged outside the conduit 6 for cooling the flowing water; specifically, the phase change cooling device 8 is an inverted U-shaped hollow box. A liquid injection hole is opened at the top of the hollow box. A hole cover 15 is arranged corresponding to the liquid injection hole. The hollow box is filled with a glycerol solution with a concentration of 50%. The hollow box and the hole cover 15 are both preferably made of 310S stainless steel.
[0029] The water tank 12, the water pump 11 and the phase change cooling device 8 are all placed on the steel table 13. An exhaust fan 7 is arranged on the steel table 13 corresponding to the position between the high-temperature furnace and the phase change cooling device 8; preferably, the exhaust fan 7 is a pipeline industrial exhaust fan 7 with a power of more than 750W, the water pump 11 is a 0.25KW self-priming pump, the pressure gauge 9 is a fire fighting pressure gauge 9 with a range of 0.0 - 1.6MPa, and the valve 10 is a two-piece ball valve 10 and is made of 304 stainless steel.
[0030] Next, through Figures 4~8The test box is described in detail. The box cover 17 includes a hollow quadrangular pyramid with the bottom surface facing downward. The box body 5 includes five hollow quadrangular pyramids with the bottom surfaces all facing inward. The bottom surfaces of the six hollow quadrangular pyramids are evenly covered with water spray holes 21, and internal threaded pipes 23 are provided at the apexes of the six hollow quadrangular pyramids; around the opening of the box body 5, there are fixed edge strips one 25 provided all around, and around the bottom of the box cover 17, there are fixed edge strips two 18 provided all around. Fixed holes 22 are opened on the fixed edge strips one 25 and the fixed edge strips two 18 for fasteners to pass through; the sides of the quadrangular pyramid are all triangular structures, which can withstand greater pressure and impact and are suitable for withstanding the loads during high temperature and water jetting processes.
[0031] In this embodiment, the high-temperature furnace includes a furnace door 2 and a furnace body 1 with an opening at the front side. A through hole one 30 is opened on the right side surface of the furnace body 1 for a drain steam pipe 4 to pass through, a through hole two 31 is opened for a conduit 6 located on the right side of the box body 5 to pass through, a through hole three 32 is opened for a conduit 6 located above the box body 5 to pass through, a through hole four 33 is opened on the rear side surface of the furnace body 1 for a conduit 6 located behind the box body 5 to pass through, a through hole five 34 is opened on the left side surface of the furnace body 1 for a conduit 6 located on the left side of the box body 5 to pass through, a through hole six 35 is opened for a conduit 6 located in front of the box body 5 to pass through, and a through hole seven 36 is opened for a conduit 6 located below the box body 5 to pass through. The gaps between the through holes and the conduits 6 and the drain steam pipe 4 are sealed with aluminosilicate fiber cotton, as Figure 9 shown.
[0032] The first bracket 3 is a cuboid frame structure. The first bracket 3 includes a grid net 28. Four support columns 27 are provided below the grid net 28, and eight limiting rods 29 are provided around it to prevent the concrete test block 19 from being knocked down by the high-strength water pressure during the spraying process; preferably, the test box drain steam pipe 4, the first bracket 3, and the first bracket 3 are all made of W70 tungsten copper, as Figure 10 and 11 shown.
[0033] When the utility model is in use, the phase change cooling device 8 is placed in a freezer and frozen at -30°C to -40°C until glycerol completely becomes solid, and then taken out; the high-temperature furnace is placed at a suitable position on the ground, the first bracket 3 is placed inside the high-temperature furnace, the second bracket 20 is placed inside the box body 5, and the concrete test block 19 is placed on the second bracket 20 inside the box body 5; the box cover 17 is covered on the box body 5, and the two are fixed into one body by passing a steel wire 16 through the fixing hole 22; the test box is placed on the first bracket 3 inside the high-temperature furnace, a conduit 6 passes through the high-temperature furnace and is connected to the threaded pipe on the corresponding surface of the box body 5, and the other end is communicated with a water pump 11 and a water tank 12 placed on a steel table 13; a drain steam pipe 4 passes through the through hole 1 30 and is communicated with a drain threaded pipe 26; the phase change cooling device 8 is placed on the steel table 13 and its groove is attached to the outside of the conduit 6, an exhaust fan 7 is placed on the steel table 13 and is located near the conduit 6 between the high-temperature furnace and the phase change cooling device 8, and is operated; after closing the furnace door 2 and operating the high-temperature furnace to heat to the target temperature, the water pump 11 is operated, and the water pressure is adjusted to the target pressure by adjusting the valve 10. During the test, when the glycerol in the phase change cooling device 8 is completely liquefied, another phase change cooling device 8 that has been completely frozen is replaced; after the test reaches the target time, the high-temperature furnace and the water pump 11 are stopped, and the concrete test block 19 is taken out and its performance is tested. The advantages of the utility model are as follows: the exhaust fan 7 and the phase change cooling device 8 can maintain a stable test environment; the main part of the utility model is made of tungsten copper material with good thermal conductivity and high temperature resistance, which will neither be damaged by high temperature nor affect the concrete, can be reused, and can resist the impact of slurry debris generated by the cracking of the concrete test block 19 due to high temperature.
[0034] The utility model is not limited to the above embodiments. Based on the technical solutions disclosed in the utility model, those skilled in the art can make some substitutions and deformations to some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the utility model.
Claims
1. A test device for simulating the action of fire-fighting water injection on concrete in a fire, comprising a high-temperature furnace, characterized in that, A first support is arranged inside the high-temperature furnace for supporting the fire simulation device. The fire simulation device includes a test box and six water spraying devices. The test box includes a box cover and a box body with an opening at the top. A second support is arranged inside the box body for placing concrete test blocks. The bottom of the box body is communicated with a drain steam pipe. The six water spraying devices are used for spraying in six directions of front, back, left, right, up and down of the concrete test blocks respectively. Each water spraying device includes a water tank and a pressure gauge. The water outlet end of the water tank is communicated with the water inlet end of a water pump. The water outlet end of the water pump is communicated with the test box through a conduit. A valve is arranged on the water pump. The pressure gauge is used for detecting the water pressure at the water outlet end of the water pump. A phase change cooling device is arranged outside the conduit for cooling the flowing water.
2. The test device for simulating the action of fire-fighting water spraying on concrete in a fire according to claim 1, wherein, The box cover includes a hollow quadrangular pyramid with the bottom surface facing downwards. The box body includes five hollow quadrangular pyramids with the bottom surfaces all facing inwards. A number of water spraying holes are evenly distributed at equal intervals on the bottom surfaces of the six hollow quadrangular pyramids. Threaded pipes are arranged at the apexes of the six hollow quadrangular pyramids.
3. The test device for simulating the action of fire-fighting water spraying on concrete in a fire according to claim 1, characterized in that, Fixed side strips are arranged around the opening of the box body. Fixed side strips are arranged around the bottom of the box cover. Fixing holes are formed in the fixed side strips for fasteners to pass through.
4. The testing device for simulating the action of fire-fighting water spraying on concrete in a fire according to claim 1, characterized in that, The first support is of a cuboid frame structure. The first support includes a grille net. Four support columns are arranged on the lower side of the grille net, and a number of limiting rods are arranged around.
5. The test device for simulating the action of fire-fighting water jet on concrete according to claim 1, characterized in that, The test box, the drain steam pipe, the first support and the second support are all made of W70 tungsten copper.
6. The test device for simulating the action of fire-fighting water spraying on concrete according to claim 1, characterized in that, The water tank, the water pump and the phase change cooling device are all placed on a steel table. An exhaust fan is arranged on the steel table corresponding to the space between the high-temperature furnace and the phase change cooling device.
7. The test device for simulating the action of fire-fighting water spraying on concrete in a fire according to claim 6, characterized in that, The exhaust fan is a duct-type industrial exhaust fan with a power of more than 750W. The water pump is a 0.25KW self-priming pump. The pressure gauge is a fire-fighting pressure gauge with a measuring range of 0.0 - 1.6MPa. The valve is a two-piece ball valve made of 304 stainless steel.
8. The test device for simulating the action of fire-fighting water injection on concrete in a fire according to claim 1, characterized in that, The phase change cooling device is an inverted U-shaped hollow box. A liquid injection hole is formed at the top of the hollow box. A hole cover is arranged corresponding to the liquid injection hole. The hollow box is filled with a glycerol solution with a concentration of 50%.
9. The test device for simulating the action of fire-fighting water injection on concrete in a fire according to claim 8, characterized in that, The hollow box and the hole cover are both made of 310S stainless steel.
10. A test device for simulating the effect of fire-fighting water injection on concrete in a fire, characterized in that, The high-temperature furnace includes a furnace door and a furnace body with an opening at the front side. A number of through holes are formed in the furnace body for the conduit and the drain steam pipe to pass through respectively. The gaps between the through holes and the conduit and the drain steam pipe are sealed with aluminum silicate fiber cotton.