Fabric fireproof testing device

Abstract

The invention relates to the technical field of fabric flame retardance detection, and particularly discloses a fabric fireproof testing device which comprises a box body, an igniter, a clamping assembly and a collecting box. The baffle is arranged in the box body in a sliding mode in the height direction of the box body, a cavity is formed in the baffle, and an exhaust hole communicating with the inner cavity is formed in the side, close to the collecting box, of the baffle; the gas supply assembly comprises a gas storage tank and a first valve, the gas storage tank is used for supplying inert gas, the first valve is arranged on the gas storage tank, and the gas storage tank is communicated with the cavity in the baffle; the lifting assembly is arranged in the box body and used for driving the baffle to slide in the height direction of the box body. According to the fire extinguishing device, the baffle downwards sprays nitrogen, and the baffle downwards slides while spraying the nitrogen, so that the space of a combustion area is reduced, the oxygen concentration in the combustion area can be rapidly reduced, and therefore rapid fire extinguishing is achieved, and the nitrogen consumption is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fabric flame-retardant detection, in particular to a fabric fireproof testing device. BACKGROUND

[0002] The curtain fabric flame-retardant performance testing box is a device for evaluating the flame-retardant performance of curtain fabric under fire conditions, has the functions of adjusting the flame height and automatically recording the time, so as to realize the determination of the flame-retardant performance of the composite fabric. During the test, the fabric to be tested is clamped on the support in the testing box, and then the fabric is tested by ignition, and the flame-retardant performance is judged by observing the combustion conditions of the fabric after ignition, such as the combustion time, the flame spreading speed and the carbonization length.

[0003] When the fabric with weak flame-retardant performance is tested or the fabric has problems to cause the fire in the testing box to be too large, once the fire is out of control, the temperature in the testing box will be sharply increased, which is easy to cause safety hazards and damage the equipment, and therefore a testing device capable of quickly extinguishing the fire is required. SUMMARY

[0004] In order to facilitate the rapid extinguishing of the interior of the testing device, the application provides a fabric fireproof testing device.

[0005] The fabric fireproof testing device provided by the application adopts the following technical scheme: A fabric fireproof testing device, comprising a box body and an igniter, a clamping assembly and a collection box arranged in the box body, the clamping assembly is used for clamping the fabric to be tested, and the collection box is used for collecting the ash falling after the fabric is burned; A baffle is slidably arranged in the box body along the height direction of the box body, a cavity is arranged in the baffle, an exhaust hole is arranged on one side of the baffle close to the collection box and communicates with the cavity in the baffle, and a ventilation hole is arranged on the baffle and located outside the cavity and does not communicate with the cavity; An opening and closing assembly is arranged in the box body and is used for controlling the opening and closing of the ventilation hole, so that the ventilation hole is in an open state in a normal state, and the ventilation hole is closed when the baffle slides to the side close to the collection box; A gas supply assembly comprises a gas storage tank and a first valve, the gas storage tank is used for supplying inert gas, the first valve is arranged on the gas storage tank, and the gas storage tank communicates with the cavity in the baffle; A lifting assembly is arranged in the box body and is used for driving the baffle to slide along the height direction of the box body.

[0006] The nitrogen in the gas tank can flow into the cavity in the baffle, and then be discharged downward to the box through the exhaust hole, so as to reduce the oxygen concentration in the box and achieve rapid fire extinguishing; the baffle can slide downward while injecting nitrogen downward, and stop until the baffle slides to the side close to the bottom collecting box, so that the space of the combustion area formed by the baffle, the inner wall of the box and the collecting box gradually reduces, and the nitrogen concentration in the combustion area can be rapidly increased under the condition that the nitrogen injection speed is unchanged, so as to accelerate the oxygen concentration reduction speed in the combustion area, which helps to improve the fire extinguishing efficiency; in addition, since the combustion area gradually reduces, the nitrogen consumption during the fire extinguishing process can be reduced, which helps to reduce the fire extinguishing cost when the fabric with weak flame retardance is tested for multiple times; the baffle is not only used for fire extinguishing, but also simulates the change of ventilation condition in the fire through the sliding process and the opening and closing of the air hole, which provides an experimental environment for studying the combustion characteristics of the fabric under different ventilation conditions; since the combustion area gradually reduces, the space for raising the ash in the collecting box can be limited, and the door body can be opened after a short waiting time after the fire extinguishing process is completed, and the collecting box can be taken out and emptied of the ash.

[0007] Optionally, when the baffle is located at the side of the clamping assembly close to the collecting box, the side wall of the baffle abuts against the inner wall of the box.

[0008] By adopting the above technical scheme, when the baffle is located at the side of the clamping assembly close to the collecting box, the side wall of the baffle abuts against the inner wall of the box, so that the combustion area formed by the baffle, the inner wall of the box and the collecting box can form an effective sealing structure, and when nitrogen is injected into the combustion area, the nitrogen is not easy to leak into the box above the baffle, so as to help to rapidly reduce the oxygen concentration in the combustion area below the baffle, thereby ensuring efficient use of nitrogen and rapid fire extinguishing; in addition, since the baffle abuts against the inner wall of the box, when the baffle slides downward, the ash adhering to the inner wall of the box can be cleaned into the collecting box, thereby realizing self-cleaning of the inner wall of the box.

[0009] Optionally, the opening and closing assembly comprises a bracket, a stopper and a first magnet, the bracket is slidingly arranged on the baffle along the height direction of the box, the stopper is fixedly connected to the bracket, the stopper is used for plugging the air hole, and the first magnet is arranged on the inner wall of the box, when the first magnet is attracted to the bracket, the stopper is located outside the air hole.

[0010] By adopting the above technical solution, the opening and closing component controls the opening and closing of the vent. When the baffle is above the clamping component, the first magnet is attracted to the bracket, and the block is located outside the vent, thus ensuring that the vent remains open under normal conditions. Therefore, the toxic gases generated by the fabric combustion during the test can be quickly discharged into the fume hood outside the chamber through the vent, preventing the toxic gases from accumulating inside the chamber. When the baffle slides towards the collection box, the bracket separates from the first magnet, and the block blocks the vent, effectively preventing airflow. Therefore, during the baffle's downward movement, the nitrogen injected downward by the baffle is less likely to flow through the vent to the area above the baffle, which optimizes resource use and reduces nitrogen waste.

[0011] Optionally, the clamping assembly includes a support base and a support member. The support base is fixedly disposed in the housing, and the support member is slidably connected to the support base. The support member includes a first clamping plate and a second clamping plate. The side of the first clamping plate and the second clamping plate that is close to each other is used to abut against the fabric. A positioning post is provided on the first clamping plate, and a positioning hole is opened on the second clamping plate. The positioning post is slidably inserted into the positioning hole.

[0012] By adopting the above technical solution, the sides of the first clamping plate and the second clamping plate that are close to each other abut against the fabric, which can effectively prevent the fabric from shifting or loosening during the test; the positioning post is slidably inserted into the positioning hole, which not only ensures the accurate relative position between the first clamping plate and the second clamping plate, but also facilitates quick adjustment and fixing of the fabric, thus improving the ease of operation of the testing device.

[0013] Optionally, the first clamping plate is provided with a second magnet for engaging with the second clamping plate.

[0014] By adopting the above technical solution, the setting of the second magnet can enhance the attraction between the first clamping plate and the second clamping plate, and further improve the clamping stability of the fabric.

[0015] Optionally, an air inlet pipe and an exhaust pipe are fixedly installed on the inner wall of the housing. A flow channel is opened in the first clamping plate, and both ends of the flow channel pass through the first clamping plate. One end of the flow channel is connected to the air inlet pipe, and the other end of the flow channel is connected to the exhaust pipe. A cold air supply assembly is installed inside the housing. The cold air supply assembly is used to introduce cooling air into the air inlet pipe so that the cooling air flows into the flow channel and is then discharged through the exhaust pipe.

[0016] By adopting the technical scheme, the cooling air enters the flow channel from the air inlet pipe through the cold air supply assembly and is discharged through the air outlet pipe, which can effectively reduce the temperature of the first clamping plate, thereby reducing the thermal influence of the flame on the first clamping plate during the test, prolonging the service life of the clamping assembly; after the cooling air cools the first clamping plate, the first clamping plate can reduce the temperature of the edge of the fabric, so that the edge of the fabric is not easy to burn, and when the fabric burns to produce molten ash, the molten ash is not easy to adhere between the first clamping plate and the second clamping plate, thereby ensuring the cleanliness of the clamping surface of the first clamping plate and the second clamping plate, helping to ensure the clamping effect on the subsequent fabric, thereby ensuring the accuracy of the test; in addition, since the cooling air can cool the first clamping plate and the second clamping plate, after the test process is completed, the temperature of the first clamping plate and the second clamping plate is prevented from being too high, so that when the first clamping plate and the second clamping plate are extracted and clamp new fabric, the operator is not easy to be scalded, and the fabric edge is not easy to shrink due to high temperature, thereby affecting the clamping effect on the fabric.

[0017] Optionally, a branch pipe is connected to the air outlet pipe, and the branch pipe is in communication with the cavity in the baffle.

[0018] By adopting the technical scheme, the cooling air enters the cavity in the baffle and is discharged downward through the air outlet hole, thereby reducing the temperature in the burning area below the baffle, helping to enhance the fire extinguishing effect and improve the fire extinguishing efficiency.

[0019] Optionally, a humidifier is arranged in the box, and a humidifying pipe is connected to the baffle and in communication with the humidifier and the cavity in the baffle.

[0020] By adopting the technical scheme, the humidifier injects humidified gas into the box through the humidifying pipe, which is convenient for adjusting the humidity in the box, providing a stable humidity environment for fabric testing, simulating different climate conditions, and ensuring the accuracy of the test results; in addition, the humidified gas can be injected into the box when the baffle slides to the side close to the collection box, which helps to further reduce the temperature in the box and prevent the burning risk caused by the dry environment in the box due to excessive fire during the test.

[0021] Optionally, a filter screen is arranged on the side of the baffle close to the collection box, and a vibration assembly is arranged in the box, the vibration assembly comprising a spring, a first gear, a toothed plate and a rack, the spring being connected between the filter screen and the baffle, the first gear being rotatably connected to the baffle, the toothed plate being fixedly connected to the inner wall of the box, the toothed plate being provided with a plurality of teeth arranged at intervals, the rack being fixedly connected to the filter screen, and the rack and the toothed plate being used for meshing with the first gear to drive the first gear to rotate intermittently when the baffle slides, and the first gear drives the rack and the filter screen to slide intermittently.

[0022] By adopting the technical scheme, the filter screen can effectively intercept relatively large particulate matters generated in the combustion process, preventing the particulate matters from entering the cavity inside the baffle through the exhaust hole, thereby avoiding blockage; meanwhile, the setting of the vibration assembly enables the filter screen to intermittently slide when the baffle slides, and the elasticity of the spring and the cooperation of the gear and the rack can drive the filter screen to vibrate, thereby shaking off the ash or particulate matters adhered to the surface of the filter screen, maintaining the unobstructedness of the filter screen, and realizing the automatic cleaning function of the filter screen, reducing the need for manual maintenance, and improving the reliability of the device operation.

[0023] Optionally, the box is provided with a third magnet for attracting the second clamping plate, and the box is provided with a driving assembly, the driving assembly comprising a second gear, a driving rack and a driven rack, the second gear being rotationally connected to the inner wall of the box, the driving rack being fixedly connected to the baffle, and the driven rack being fixedly connected to the second clamping plate, the driving rack and the driven rack being used for meshing with the second gear, so that when the baffle slides towards the side close to the collection box, the second clamping plate is driven to slide away from the first clamping plate until the second clamping plate is attracted to the third magnet.

[0024] By adopting the technical scheme, when the baffle slides towards the side close to the collection box, the driving rack drives the second gear to rotate, and the second gear drives the driven rack to move, so that the second clamping plate slides away from the first clamping plate and is finally attracted to the third magnet; this design can ensure that the clamping assembly automatically releases the fabric during the movement of the baffle, so that the fabric falls into the collection groove, and only the combustion area composed of the baffle, the inner wall of the box and the collection box needs to be extinguished subsequently; since the fabric falls in time, the ash generated during the combustion of the fabric is not easy to adhere between the first clamping plate and the second clamping plate, which helps to ensure the cleanliness of the clamping surface and thus ensures the clamping effect.

[0025] In summary, the present application has the following beneficial technical effects: 1. The baffle injects nitrogen into the box interior, which can reduce the oxygen concentration in the box interior, thereby achieving rapid extinguishing and avoiding excessive fire in the box interior, and protecting the structure inside the box; during the process of injecting nitrogen by the baffle, the baffle is in a state of sliding downward, so that the combustion area composed of the baffle, the inner wall of the box and the collection box gradually shrinks, which can accelerate the speed of reducing the oxygen concentration in the combustion area, thereby improving the extinguishing efficiency and reducing the amount of nitrogen used.

[0026] 2. The baffle can inject cold air into the combustion area inside the box, so as to reduce the temperature of the combustion area, thereby further enhancing the extinguishing effect.

[0027] 3. The cold air flowing in the first clamping plate can cool the first clamping plate, so that the edge of the fabric clamped between the first clamping plate and the second clamping plate can be cooled, so that the edge of the fabric is not easy to burn, so that the ash generated when the fabric burns is not easy to adhere to between the first clamping plate and the second clamping plate, thereby ensuring the cleanliness of the clamping surface between the first clamping plate and the second clamping plate, and helping to ensure the clamping effect.

[0028] 4. Without extinguishing, after the test process is completed, cold air can be injected into the box through the baffle, thereby reducing the temperature inside the box, so that the box can recover to the initial temperature faster, helping to ensure the test environment of the next fabric to be tested, so that the test result is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of the overall structure of the embodiment of the present application; Figure 2 is a sectional view of the embodiment of the present application; Figure 3 is a schematic view of the structure of the clamping assembly of the embodiment of the present application; Figure 4 is a sectional view of the embodiment of the present application from another perspective; Figure 5 is a sectional view of the embodiment of the present application for showing the driving assembly; Figure 6 is Figure 5 is an enlarged schematic view of A in Figure 7 is a sectional view of the embodiment of the present application for showing the flow channel.

[0030] : 1, box; 11, shell; 111, door body; 1111, second thick plate; 112, mounting hole; 113, air exchange opening; 114, partition plate; 12, first thick plate; 2, igniter; 3, clamping assembly; 31, support seat; 32, support piece; 321, first clamping plate; 3211, positioning column; 3212, flow channel; 3213, sliding block; 3214, sealing plate; 322, second clamping plate; 3221, positioning hole; 4, collection box; 5, baffle; 51, cavity; 52, partition plate; 53, exhaust hole; 54, air permeable hole; 6, opening and closing assembly; 61, bracket; 62, stop block; 63, first magnet; 7, air supply assembly; 71, air storage tank; 72, first valve; 8, lifting assembly; 81, second motor; 82, second screw; 9, air inlet pipe; 10, air outlet pipe; 14, cold air supply assembly; 15, branch pipe; 16, second valve; 17, filter screen; 18, vibration assembly: 181, spring; 182, first gear; 183, toothed plate; 184, rack; 19, third magnet; 20, driving assembly; 201, second gear; 202, driving rack; 203, driven rack; 21, mounting block; 22, first motor; 23, first screw; 24, air supply pipe; 25, lead-out pipe; 26, discharge pipe; 27, fabric. DETAILED DESCRIPTION

[0031] The following Figures 1-7 The present application is further described in detail.

[0032] The embodiment of the present application discloses a fabric fireproof testing device. Referring to Figure 1 and Figure 2 , the fabric fireproof testing device comprises a box 1 and an igniter 2, a clamping assembly 3 and a collection box 4 arranged in the box 1. The height direction of the box 1 is vertically arranged. The collection box 4 is located at the bottom of the box 1 and is used for collecting the ash falling in the combustion process. A door body 111 is hingedly arranged on one side of the box 1, so that the collection box 4 containing the ash can be taken out, thereby emptying the ash; a transparent observation window is arranged on the door body 111, so that the combustion inside can be observed. The igniter 2 is located above the collection box 4, and the flame outlet of the igniter 2 faces upwards. Figure 2 and Figure 3 The clamping assembly 3 is located above the igniter 2, and the clamping assembly 3 is used for clamping the fabric 27 to be tested.

[0033] Referring to Figure 2 and Figure 3The clamping assembly 3 comprises a support base 31 and a support piece 32. The support base 31 is arranged along the length direction of the box body 1 and is fixedly connected to the inner wall of the box body 1, and the support base 31 is used for bearing the support piece 32. The support piece 32 comprises a first clamping plate 321 and a second clamping plate 322, and the first clamping plate 321 and the second clamping plate 322 are both arranged in a U shape. The fabric 27 is clamped between the first clamping plate 321 and the second clamping plate 322; a positioning column 3211 is fixedly connected to the top wall of the first clamping plate 321, a positioning hole 3221 is formed in the second clamping plate 322, and the positioning column 3211 is slidably arranged in the positioning hole 3221, so that the positioning effect is enhanced, thereby ensuring the clamping effect on the fabric 27.

[0034] Further, a second magnet is fixedly connected to the side of the first clamping plate 321 close to the second clamping plate 322, and the first clamping plate 321 and the second clamping plate 322 are both made of steel, so that the second magnet can be attracted to the second clamping plate 322, thereby increasing the clamping force and enhancing the clamping effect of the first clamping plate 321 and the second clamping plate 322 on the fabric 27.

[0035] Referring to Figure 2 and Figure 4 , an installation hole 112 is formed in one of the side walls of the box body 1, so that the first clamping plate 321 and the second clamping plate 322 can be slid into the box body 1 through the installation hole 112, and the first clamping plate 321 is overlapped on the support base 31. A sliding groove is formed in the support base 31, and a sliding block 3213 is arranged on the bottom wall of the first clamping plate 321 and is slidably connected to the sliding groove, so that the stability of the first clamping plate 321 and the second clamping plate 322 after being installed in the box body 1 can be improved. Figure 2 and Figure 3 , an end portion of the first clamping plate 321 is further fixedly connected with a sealing plate 3214, and the sealing plate 3214 is used for sealing the installation hole 112; and a handle is fixedly connected to the sealing plate 3214.

[0036] Referring to Figure 2 , the igniter 2 is fixedly installed on the installation block 21, and the installation block 21 is slidably connected to the inner wall of the box body 1 along the length direction of the box body 1; a first motor 22 is arranged inside the box body 1, a first screw rod 23 is coaxially fixedly connected to the output shaft end of the first motor 22, and the first screw rod 23 is threadedly connected with the installation block 21. Thus, the first motor 22 drives the first screw rod 23 to rotate, so that the installation block 21 drives the igniter 2 to slide, thereby adjusting the installation position of the igniter 2, and facilitating the ignition of different positions of the fabric 27.

[0037] The box body 1 is further provided with a baffle 5 and a lifting assembly 8. The baffle 5 is slidingly connected to the inner wall of the box body 1 in the vertical direction; the lifting assembly 8 comprises a second motor 81 and a second screw rod 82. The second motor 81 is fixedly connected in the box body 1, and the second screw rod 82 is coaxially fixedly connected to the output shaft end of the second motor 81. The second screw rod 82 is threadedly connected with the baffle 5, so that the second motor 81 drives the second screw rod 82 to rotate, thereby enabling the baffle 5 to slide in the vertical direction.

[0038] A cavity 51 is formed in the baffle 5. An exhaust hole 53 is formed in the bottom wall of the baffle 5, and the exhaust hole 53 is in communication with the cavity 51. The exhaust hole 53 is provided with a plurality of exhaust holes arranged in an array. The box body 1 is further provided with a gas supply assembly 7 for supplying gas to the cavity 51. The gas supply assembly 7 comprises a gas storage tank 71 and a first valve 72. The gas storage tank 71 is fixedly connected in the box body 1. The gas storage tank 71 is a high-pressure tank body with nitrogen stored therein. In other embodiments, other inert gases can also be stored. The first valve 72 is connected to the opening of the gas storage tank 71. The first valve 72 is used to control the opening and closing of the pipeline. The gas storage tank 71 is in communication with the cavity 51 in the baffle 5 through a gas supply pipe 24. Thus, after the first valve 72 is opened, the nitrogen in the gas storage tank 71 can flow into the cavity 51 in the baffle 5 through the gas supply pipe 24, and then be discharged downward to the box body 1 through the exhaust hole 53, thereby reducing the oxygen content in the box body 1 and achieving rapid fire extinguishing.

[0039] In the initial state, the baffle 5 is located above the clamping assembly 3, so that the arrangement of the baffle 5 will not affect the falling process of the ash generated by the burning of the fabric 27 in the clamping assembly 3. The ash can fall smoothly into the collection box 4. When extinguishing the fire, the baffle 5 slides downward, and at the same time, the nitrogen in the baffle 5 is discharged downward. Thus, the burning area composed of the baffle 5, the inner wall of the box body 1 and the collection box 4 gradually decreases, so that less nitrogen can be used to complete the extinguishing process, thereby reducing the amount of nitrogen and improving the extinguishing efficiency.

[0040] Referring to Figure 4 Further, the box body 1 comprises an outer shell 11 and a first thickened plate 12 fixedly connected to the inner wall of the outer shell 11. The first thickened plate 12 is located in the lower half of the outer shell 11 and below the support seat 31. A second thickened plate 1111 is fixedly installed on the door body 111 on the side close to the inside of the box body 1. During the test, the door body 111 is in a closed state. Thus, after the baffle 5 slides downward to the side close to the collection box 4, the second thickened plate 1111 and the first thickened plate 12 are abutted against the side wall of the baffle 5, which helps to enhance the sealing performance of the burning area below the baffle 5, so that the downward introduced nitrogen is not easy to flow to the upper side of the baffle 5, which helps to reduce waste and ensure the nitrogen extinguishing effect. The second thickened plate 1111 is a hollow plate made of transparent material, so that the arrangement of the second thickened plate 1111 will not affect the observation.

[0041] With reference to Figure 2 In addition, the interior of the shell 11 is provided with a partition plate 114, the baffle 5, the clamping assembly 3 and the collection box 4 are arranged on one side of the partition plate 114, and the first motor 22, the second motor 81 and the gas storage tank 71 are arranged on the other side of the partition plate 114; in order to ensure the normal transmission of the first screw rod 23 and the second screw rod 82, an avoiding groove is formed on the partition plate 114. A blocking cloth (not shown in the figure) is fixedly connected to the wall surface of the side of the partition plate 114 close to the gas storage tank 71, the blocking cloth is resistant to high temperature and has flexibility, the blocking cloth is arranged outside the avoiding groove, so that the nitrogen gas on the right side of the partition plate 114 can be prevented from flowing into the left side of the partition plate 114, thereby enhancing the sealing performance and ensuring the fire extinguishing efficiency. In other embodiments, the blocking cloth can be replaced by a closed shell, which can achieve sealing.

[0042] The cavity 51 in the baffle 5 is also provided with a partition plate 52, the partition plate 52 divides the cavity 51 in the baffle 5 into two parts, one part has a larger volume and the other part has a smaller volume. The part of the cavity 51 with a larger volume is in communication with the gas supply pipe 24 and is used for injecting nitrogen gas into the combustion area; the part of the cavity 51 with a smaller volume is connected with a lead-out pipe 25, the end of the lead-out pipe 25 extends to the outside of the box body 1 and is used for discharging the gas in the combustion area, so as to prevent the gas pressure in the combustion area from being too large and ensure the safety of the equipment.

[0043] The box body 1 is provided with a flame sensor, which can detect the flame combustion condition in the box body 1, when the fire is too large, the second motor 81 is started to drive the baffle 5 to move downward; at the same time, the first valve 72 is opened to make the baffle 5 inject nitrogen gas into the box body 1 to extinguish the fire.

[0044] The top of the box body 1 is provided with an air exchange port 113, which is convenient for the gas generated during the combustion of the fabric 27 in the box body 1 to be quickly discharged, and also facilitates the inflow of external air into the box body 1, so as to ensure the oxygen content in the box body 1 and thus ensure the normal combustion of the flame. Since the baffle 5 is located above the clamping assembly 3 under normal circumstances, the baffle 5 will affect the air exchange process in the box body 1, in order to weaken this influence, the baffle 5 is provided with a plurality of air permeable holes 54 arranged in an array. The air permeable holes 54 are located outside the cavity 51 of the baffle 5 and are not in communication with the cavity 51 in the baffle 5, so that the arrangement of the air permeable holes 54 helps to enhance the air exchange efficiency between the inside and outside of the box body 1.

[0045] Further, the baffle 5 is provided with an opening and closing assembly 6 for controlling the opening and closing of the air vent hole 54. The opening and closing assembly 6 comprises a support 61, a stopper 62 and a first magnet 63. The support 61 is slidingly connected to the top wall of the baffle 5 in the vertical direction. The number of the stoppers 62 is the same as that of the air vent holes 54, and each stopper 62 corresponds to an air vent hole 54. The shape of the stopper 62 is adapted to that of the air vent hole 54, and the stopper 62 is in the shape of a circular truncated cone. The stopper 62 is fixedly connected to the bottom wall of the support 61. The first magnet 63 is fixedly connected to the inner wall of the box body 1, and the support 61 is made of steel, so that the first magnet 63 and the support 61 can be attracted to each other. When the baffle 5 is located above the clamping assembly 3, the first magnet 63 and the support 61 are attracted to each other, at this time, the stopper 62 is located above the air vent hole 54, so that the air vent hole 54 is in an open state. After the baffle 5 slides downward, the baffle 5 drives the support 61 and the stopper 62 to slide downward, at this time, the attraction of the first magnet 63 to the support 61 is lost, and the support 61 and the stopper 62 move downward relative to the baffle 5 under the action of gravity, so that the stopper 62 slides into the air vent hole 54 to block the air vent hole 54; at this time, the nitrogen gas discharged downward by the baffle 5 is not easy to be discharged upward through the air vent hole 54, which helps to ensure the nitrogen concentration in the combustion area below the baffle 5, so as to achieve rapid fire extinguishing.

[0046] With reference to Figure 4 The baffle 5 is further provided with a filter screen 17, which can intercept the ash accidentally raised by the nitrogen gas sprayed during the fire extinguishing process, so as to prevent the ash from entering the cavity 51 inside the baffle 5. The filter screen 17 is slidingly connected to the bottom wall of the baffle 5 in the vertical direction. The box body 1 is provided with a vibration assembly 18 for driving the filter screen 17 to vibrate. The vibration assembly 18 comprises a spring 181, a first gear 182, a toothed plate 183 and a toothed bar 184. The spring 181 is fixedly connected between the filter screen 17 and the baffle 5, and four springs 181 are arranged at the four corners of the filter screen 17. The first gear 182 is rotatably connected to the baffle 5. The toothed plate 183 is fixedly connected to the inner wall of the box body 1, and is located below the clamping assembly 3. The toothed plate 183 is vertically arranged, and is provided with a plurality of toothed plates 183 which are arranged in the vertical direction. The toothed bar 184 is vertically arranged, and is fixedly connected to the filter screen 17. The toothed bar 184 is always in meshing state with the first gear 182. It should be noted that the width of the first gear 182 is greater than the sum of the widths of the toothed plate 183 and the toothed bar 184, and the toothed plate 183 and the toothed bar 184 are not in the same vertical direction, so that the toothed plate 183 and the toothed bar 184 are respectively used to mesh with different parts of the first gear 182.

[0047] When the fire is extinguished, the baffle 5 slides down to the side close to the collecting box 4; after the fire is extinguished, the baffle 5 slides up to reset; when the baffle 5 moves up, the first gear 182 moves up; when the first gear 182 meshes with the lowermost toothed plate 183, the first gear 182 rotates while moving up; the first gear 182 drives the rack 184 and the filter screen 17 to move down relative to the baffle 5, and the spring 181 is stretched; when the first gear 182 disengages from the toothed plate 183, the spring 181 drives the filter screen 17 to move up relative to the baffle 5 because the filter screen 17 is no longer limited by the toothed plate 183. Because the toothed plate 183 is provided with multiple toothed plates, the filter screen 17 can slide back and forth multiple times during the upward movement of the baffle 5; the filter screen 17 vibrates while sliding, which shakes off the attached ash, thereby ensuring the smoothness of the filter screen 17.

[0048] With reference to Figure 5 and Figure 6 When the fire of the fabric 27 clamped between the first clamping plate 321 and the second clamping plate 322 is too large, it needs to be quickly extinguished; in order to facilitate the smooth progress of the extinguishing process, the third magnet 19 and the driving assembly 20 are arranged in the box body 1. The third magnet 19 is fixedly connected to the inner wall of the box body 1, and the third magnet 19 is located above the clamping assembly 3 and is used to attract the second clamping plate 322. The driving assembly 20 is used to drive the second clamping plate 322 to move up.

[0049] With reference to Figure 6 The driving assembly 20 includes a second gear 201, a driving rack 202, and a driven rack 203. The second gear 201 is rotatably connected to the inner wall of the box body 1, the driving rack 202 and the driven rack 203 are both vertically arranged, the driving rack 202 is fixedly connected to the side wall of the baffle 5, the driven rack 203 is fixedly connected to the second clamping plate 322, and the driving rack 202 and the driven rack 203 are both used to mesh with the second gear 201. The second gear 201 is always in meshing state with the driven rack 203; in the test state, the first clamping plate 321 and the second clamping plate 322 abut, and the baffle 5 is located above the second clamping plate 322; when it is necessary to quickly extinguish the fire, the baffle 5 moves down and drives the driving rack 202 to move down; when the driving rack 202 meshes with the second gear 201, the driving rack 202 moves down to drive the second gear 201 to rotate, and the second gear 201 drives the driven rack 203 and the second clamping plate 322 to move up; when the driving rack 202 disengages from the second gear 201, the second clamping plate 322 moves to the state of being attracted by the third magnet 19. At this time, the second clamping plate 322 and the first clamping plate 321 are in a separated state, and the fabric 27 originally clamped between the first clamping plate 321 and the second clamping plate 322 falls into the collecting box 4. Then, it is only necessary to extinguish the fire in the combustion area composed of the baffle 5, the inner wall of the box body 1, and the collecting box 4.

[0050] When the fire extinguishing process is completed, the baffle 5 is moved up again, at this time the second clamping plate 322 can be made to slide downward to the state of abutting against the first clamping plate 321, so as to complete the resetting of the second clamping plate 322, facilitating the subsequent extraction of the first clamping plate 321 and the second clamping plate 322 to the outside of the box body 1, and completing the clamping of the next fabric 27 to be tested.

[0051] When the fabric 27 clamped between the first clamping plate 321 and the second clamping plate 322 is burning, the flame will spread to the edge, in order to reduce the possibility of burning at the edge of the fabric 27, referring to Figure 7 , the inside of the first clamping plate 321 is provided with a flow channel 3212 for the circulation of cold air, and the two ends of the flow channel 3212 respectively penetrate through the two ends of the first clamping plate 321. The inner wall of the box body 1 is fixedly connected with an air inlet pipe 9 and an air outlet pipe 10; the air inlet pipe 9 is in communication with the cold air supply assembly 14, and the air outlet pipe 10 is connected with a discharge pipe 26, the distal end of which extends to the outside of the box body 1; one end of the flow channel 3212 is in communication with the air inlet pipe 9, and the other end of the flow channel 3212 is in communication with the air outlet pipe 10. Thus, the cold air discharged by the cold air supply assembly 14 can flow into the flow channel 3212 through the air inlet pipe 9, and then be discharged to the outside of the box body 1 through the air outlet pipe 10 and the discharge pipe 26, and the cold air in the flow channel 3212 can cool the first clamping plate 321 and the second clamping plate 322, thereby cooling the edge of the fabric 27, making the edge of the fabric 27 not easy to burn, and the side of the first clamping plate 321 and the second clamping plate 322 close to each other not easy to adhere to the ash, thereby ensuring the clamping effect of the subsequent fabric 27.

[0052] Referring to Figure 2 and Figure 7 , further, the air outlet pipe 10 is fixedly connected with a branch pipe 15, and the end of the branch pipe 15 away from the air outlet pipe 10 is in communication with the cavity 51 inside the baffle 5. Thus, during the fire extinguishing process, the cold air in the flow channel 3212 can flow into the cavity 51 inside the baffle 5 through the branch pipe 15, and then be discharged downward into the burning area through the exhaust hole 53, thereby reducing the temperature of the burning area and helping to accelerate the fire extinguishing process.

[0053] Referring to Figure 7 , the branch pipe 15 is installed with a second valve 16, in this embodiment, the second valve 16 is a three-way valve, the inlet of the three-way valve is in communication with the air outlet pipe 10, one of the outlets of the three-way valve is in communication with the discharge pipe 26, and the other outlet of the three-way valve is in communication with the branch pipe 15. Thus, during the fire extinguishing process, the cold air in the flow channel 3212 can all flow into the cavity 51 inside the baffle 5 through the branch pipe 15, which helps to enhance the cooling effect on the burning area.

[0054] In addition, the box 1 is provided with a humidifier, the humidifier is connected with a humidifying pipe, and the humidifying pipe is communicated with the cavity 51 in the baffle 5. Thus, after the humidifier is started, humid air can be introduced into the cavity 51 in the baffle 5 through the humidifying pipe, and the humid air in the cavity 51 is discharged into the box 1, so that the humidity in the box 1 can be quickly adjusted. Before the fire resistance test of the fabric 27 is performed, the humidity in the box 1 can be adjusted by the humidifier as required, so that the required test environment is obtained.

[0055] It should be noted that the air supply pipe 24, the lead-out pipe 25, the humidifying pipe and the branch pipe 15 in the present application are all flexible pipes, so that the sliding of the baffle 5 does not affect the connection of the pipes, thereby ensuring the normal delivery of the gas.

[0056] The implementation principle of the fabric fire resistance test device in the embodiment of the present application is as follows: the box 1 is placed in a fume hood; in the initial state, the first clamping plate 321 and the second clamping plate 322 are located outside the box 1; the fabric 27 to be tested is placed between the first clamping plate 321 and the second clamping plate 322, and then the positioning column 3211 is inserted into the positioning hole 3221, so that the first clamping plate 321 and the second clamping plate 322 are respectively abutted to the two sides of the fabric 27, and the clamping of the fabric 27 is completed. Then the first clamping plate 321 and the second clamping plate 322 are slid into the box 1, and the first clamping plate 321 and the second clamping plate 322 are supported by the support seat 31. The igniter 2 is started to ignite the fabric 27, and after a period of time, the ignition is stopped, and the condition of the fabric 27 is observed until the test is completed; during the test, the toxic gas generated by the combustion of the fabric 27 in the box 1 is discharged to the outside of the fume hood through the air exchange port 113. The ash generated by the combustion of the fabric 27 falls into the collection box 4, and after the test is completed, the door body 111 is opened, the collection box 4 is taken out, and the ash in the collection box 4 is emptied.

[0057] When the fire of the fabric 27 clamped between the first clamping plate 321 and the second clamping plate 322 is too large and needs to be quickly extinguished, the first motor 22 drives the first screw rod 23 to rotate, so that the igniter 2 slides to one side of the box 1 to avoid the downward sliding process of the baffle 5. Then the baffle 5 slides downward, and when the baffle 5 moves downward, the driven rack 203 moves downward under the cooperation of the second gear 201 and the driven rack 203, so that the second clamping plate 322 moves upward, and the clamping of the first clamping plate 321 and the second clamping plate 322 is lost, and the burning fabric 27 falls into the collection box 4. During the downward movement of the baffle 5, the nitrogen gas and the cold air in the cavity 51 in the baffle 5 can be sprayed downward, so as to reduce the oxygen concentration and the temperature in the combustion area composed of the baffle 5, the inner wall of the box 1 and the collection box 4, and quickly extinguish the combustion area.

[0058] After the fire extinguishing process is completed, the baffle 5 moves upward, the first gear 182 moves upward when the baffle 5 moves upward, the toothed plate 183 makes the first gear 182 rotate by a certain angle while moving upward, the first gear 182 drives the rack 184 and the filter screen 17 to slide downward by a certain distance relative to the baffle 5, and the spring 181 is stretched; when the first gear 182 is disengaged from the toothed plate 183, the spring 181 makes the filter screen 17 move upward relative to the baffle 5 and reset; thus, the filter screen 17 can be vibrated during the upward movement of the baffle 5, so that the ash attached to the filter screen 17 is shaken down, the self-cleaning of the filter screen 17 is realized, and the smoothness of the filter screen 17 is helped to be ensured.

[0059] After the baffle 5 slides upward to the initial position, the second clamping plate 322 moves downward to the state of abutting against the first clamping plate 321. At this time, the first clamping plate 321 and the second clamping plate 322 are pulled out again, and new to-be-tested fabric 27 can be reloaded to perform new testing.

[0060] The above is an optional embodiment of the present application, and does not limit the protection scope of the present application, so that: any equivalent change made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A fabric fire resistance testing device, characterized in that, include: The box (1) and the igniter (2), clamping assembly (3) and collection box (4) disposed in the box (1), wherein the clamping assembly (3) is used to clamp the fabric (27) to be tested, and the collection box (4) is used to collect the ash that falls after the fabric (27) is burned; A baffle (5) is slidably disposed in the box (1) along the height direction of the box (1). A cavity (51) is provided inside the baffle (5). An exhaust hole (53) communicating with the internal cavity (51) is provided on the side of the baffle (5) near the collection box (4). A vent hole (54) is provided on the baffle (5). The vent hole (54) is located outside the cavity (51) and is not communicating with the cavity (51). An opening and closing assembly (6) is provided in the housing (1) to control the opening and closing of the vent (54) so ​​that the vent (54) is normally open and the vent (54) is closed when the baffle (5) slides to the side closer to the collection box (4). The gas supply assembly (7) includes a gas storage tank (71) and a first valve (72). The gas storage tank (71) is used to supply inert gas, and the first valve (72) is disposed on the gas storage tank (71). The gas storage tank (71) is connected to the cavity (51) inside the baffle (5). The lifting assembly (8) is disposed in the housing (1) and is used to drive the baffle (5) to slide along the height direction of the housing (1).

2. The fabric fire resistance testing device according to claim 1, characterized in that: When the baffle (5) is located on the side of the clamping assembly (3) near the collection box (4), the side wall of the baffle (5) abuts against the inner wall of the box (1).

3. The fabric fire resistance testing device according to claim 1, characterized in that: The opening and closing assembly (6) includes a bracket (61), a stop block (62) and a first magnet (63). The bracket (61) is slidably disposed on the baffle (5) along the height direction of the box (1). The stop block (62) is fixedly connected to the bracket (61) and is used to block the vent hole (54). The first magnet (63) is disposed on the inner wall of the box (1). When the first magnet (63) is attracted to the bracket (61), the stop block (62) is located outside the vent hole (54).

4. The fabric fire resistance testing device according to claim 1, characterized in that: The clamping assembly (3) includes a support base (31) and a support member (32). The support base (31) is fixedly installed in the housing (1). The support member (32) is slidably connected to the support base (31). The support member (32) includes a first clamping plate (321) and a second clamping plate (322). The side of the first clamping plate (321) and the second clamping plate (322) that are close to each other is used to abut against the fabric (27). The first clamping plate (321) is provided with a positioning post (3211). The second clamping plate (322) is provided with a positioning hole (3221). The positioning post (3211) is slidably inserted into the positioning hole (3221).

5. The fabric fire resistance testing device according to claim 4, characterized in that: The first clamping plate (321) is provided with a second magnet for attracting the second clamping plate (322).

6. The fabric fire resistance testing device according to claim 4, characterized in that: An air inlet pipe (9) and an exhaust pipe (10) are fixedly installed on the inner wall of the box (1). A flow channel (3212) is opened in the first clamping plate (321). Both ends of the flow channel (3212) pass through the first clamping plate (321). One end of the flow channel (3212) is connected to the air inlet pipe (9), and the other end of the flow channel (3212) is connected to the exhaust pipe (10). A cold air supply assembly (14) is installed inside the box (1). The cold air supply assembly (14) is used to introduce cooling air into the air inlet pipe (9) so that the cooling air flows into the flow channel (3212) and then is discharged through the exhaust pipe (10).

7. The fabric fire resistance testing device according to claim 6, characterized in that: A branch pipe (15) is connected to the exhaust pipe (10), and the branch pipe (15) communicates with the cavity (51) inside the baffle (5). A second valve (16) is provided on the branch pipe (15).

8. The fabric fire resistance testing device according to claim 1, characterized in that: A humidifier is provided in the housing (1), and a humidifying pipe is connected to the baffle (5). The humidifying pipe is connected to the cavity (51) inside the humidifier and the baffle (5).

9. The fabric fire resistance testing device according to claim 1, characterized in that: A filter screen (17) is slidably disposed on the side of the baffle (5) near the collection box (4). A vibration assembly (18) is disposed inside the box (1). The vibration assembly (18) includes a spring (181), a first gear (182), a toothed plate (183), and a rack (184). The spring (181) is connected between the filter screen (17) and the baffle (5). The first gear (182) is rotatably connected to the baffle (5). The toothed plate (183) is fixedly connected to the inner wall of the box (1). Multiple toothed plates (183) are provided and arranged at intervals. The rack (184) is fixedly connected to the filter screen (17). The rack (184) and the toothed plate (183) are both used to mesh with the first gear (182) so that when the baffle (5) slides, it drives the first gear (182) to rotate intermittently. The first gear (182) drives the rack (184) and the filter screen (17) to slide intermittently.

10. A fabric fire resistance testing device according to claim 4, characterized in that: The housing (1) is provided with a third magnet (19) for engaging with the second clamping plate (322). The housing (1) is provided with a drive assembly (20). The drive assembly (20) includes a second gear (201), a drive rack (202), and a driven rack (203). The second gear (201) is rotatably connected to the inner wall of the housing (1). The drive rack (202) is fixedly connected to the baffle (5). The driven rack (203) is fixedly connected to the second clamping plate (322). The drive rack (202) and the driven rack (203) are both used to mesh with the second gear (201) so that when the baffle (5) slides towards the side closer to the collection box (4), it drives the second clamping plate (322) to slide away from the first clamping plate (321) until the second clamping plate (322) engages with the third magnet (19).

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