Fiber fabric flame resistance testing device

Abstract

The utility model relates to the technical field of building material detection, and discloses a fiber fabric flame resistance test device which comprises a furnace body, a controller is fixedly mounted on the upper side of the furnace body, a heat insulation cover is fixedly connected to the interior of the furnace body, a flow dividing pipe is fixedly connected to the inner side of the heat insulation cover, and a plurality of air outlet pipes arranged at equal intervals are fixedly connected to the inner side of the flow dividing pipe; an integrated igniter is fixedly installed on the upper surface of the flow dividing pipe. According to the fiber fabric flame resistance testing device, by means of the flow guiding effect of a Y-shaped flow guiding plate and combination of gas outlet pipes arranged on the inner side of a flow dividing pipe at equal intervals, multi-stage flow dividing of gas in the flow dividing pipe is achieved, and then under driving of a driving assembly, linkage adjustment of a first lead screw, a blocking plate and a worm wheel in a gas amount adjusting assembly is matched; the opening amount of each gas outlet pipe can be synchronously controlled, so that gas is uniformly distributed to all the gas outlet pipes, the heating deviation caused by single-point flame concentration is avoided, and the real simulation of the whole combustion state of the fabric is ensured.

Description

A flame resistance testing device for fiber fabrics Technical Field

[0001] This application relates to the field of building material testing technology, specifically a device for testing the flame resistance of fiber fabrics. Background Technology

[0002] The fire resistance of fiber fabrics is a crucial indicator. With the continuous development of the construction industry, various fiber fabrics are widely used in interior decoration, insulation, and protection, such as curtains, drapes, wall coverings, and fire blankets. In the event of a fire, the fire resistance of these fiber fabrics directly affects the safety of people and property within the building; therefore, accurately assessing the fire resistance of fiber fabrics is of paramount practical importance.

[0003] An existing patent (publication number: CN220270067U) discloses a furnace for testing the flame retardancy of fiber fabrics. It includes a furnace shell and an experimental chamber disposed within the furnace shell. The experimental chamber is equipped with a combustion device, a heat insulation hood, and an adjustable fabric placement device, which includes an adjustment component and a placement component.

[0004] The testing method used in the above scheme is a single-point test, which concentrates the flame on one point to test the material. However, this method has certain shortcomings in actual use. Because the flame is concentrated in one place, the flame distribution is uneven, resulting in huge differences in the thermal environment experienced by different parts of the fabric. It cannot truly reflect the overall heating and burning of the fabric in an actual fire. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a flame retardancy testing device for fiber fabrics, which has the advantages of being able to simultaneously control the opening amount of each gas outlet pipe, so that the gas is evenly distributed to all gas outlet pipes, avoiding the heating deviation caused by the concentration of a single flame point, and ensuring the realistic simulation of the overall combustion state of the fabric, thus solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: a flame retardancy testing device for fiber fabrics, comprising a furnace body, a controller fixedly installed on the upper side of the furnace body, a heat insulation cover fixedly connected inside the furnace body, a diversion pipe fixedly connected inside the heat insulation cover, a plurality of equally spaced gas outlet pipes fixedly connected inside the diversion pipe, an integrated igniter fixedly installed on the upper surface of the diversion pipe, the integrated igniter and the controller being electrically connected, a gas volume regulating component being provided at the bottom of each gas outlet pipe, the gas volume regulating component including a first lead screw rotatably connected to the inner side of the diversion pipe, one end of the first lead screw extending through the inner side of the diversion pipe to the outer side of the diversion pipe, a worm gear fixedly connected to one end of the first lead screw, a baffle plate threadedly connected to the outer side of the first lead screw, a driving component being provided inside the heat insulation cover, a clamping component being provided inside the heat insulation cover, and a Y-shaped guide plate fixedly connected to the inner side of the diversion pipe.

[0007] Through the above scheme, by setting the Y-shaped guide plate to guide the flow, combined with the gas outlet pipes arranged at equal intervals inside the diversion pipe, the gas can be diverted in multiple stages inside the diversion pipe. Then, under the drive of the drive component, in conjunction with the linkage adjustment of the first lead screw, baffle plate and worm gear in the gas volume adjustment component, the opening volume of each gas outlet pipe can be controlled synchronously, so that the gas is evenly distributed to all gas outlet pipes, avoiding the heating deviation caused by the concentration of single flames, and ensuring the realistic simulation of the overall combustion state of the fabric.

[0008] Furthermore, the air volume regulating component also includes a guide groove formed inside the diversion pipe, and the outer side of the baffle plate is slidably connected to the inner wall of the guide groove.

[0009] Through the above scheme, the guide groove can precisely limit the movement of the baffle plate, ensuring that the baffle plate can move in a directional manner to block the opening at the bottom of the air outlet pipe.

[0010] Furthermore, a gas transmission pipe is fixedly installed inside the furnace body. One end of the gas transmission pipe extends through the outer surface of the heat insulation cover to the bottom surface of the diversion pipe. The inner wall of the gas transmission pipe is connected to the inner wall of the diversion pipe. Multiple gas dissipation slots are opened on the side of the furnace body. A sealing door is installed on the outer side of the furnace body. The inner side of the sealing door is provided with light-transmitting and heat-insulating glass.

[0011] Through the above scheme, the opening of the gas dissipation channel and the light-transmitting and heat-insulating structure of the sealed door can not only quickly discharge the combustion exhaust gas through the gas dissipation channel to maintain the stability of the test environment, but also allow real-time observation of the flame status through the sealed door to avoid safety hazards caused by high temperature interference, while ensuring visual monitoring of the test process.

[0012] Furthermore, the drive assembly includes a first servo motor and a rotating shaft. The outer surface of the first servo motor is fixedly embedded in the outer surface of the furnace body. Both ends of the rotating shaft are rotatably connected to the inner side of the heat insulation cover. The output end of the first servo motor is fixedly connected to one end of the rotating shaft. The first servo motor and the controller are electrically connected. Multiple worm gears are fixedly connected to the outer side of the rotating shaft.

[0013] Through the above scheme, the first servo motor drives the rotating shaft to rotate the worm gear and mesh with the worm wheel, thereby realizing the synchronous displacement adjustment of all the baffles in the air volume adjustment component and ensuring that the opening volume of each air outlet is strictly consistent.

[0014] Furthermore, the number of worm gears is adapted to the number of air volume regulating components, and the worm gears and the worm wheel mesh with each other.

[0015] By implementing the above solution and adjusting the number of worm gears and worm wheels to match, mechanical transmission errors are eliminated, making the gas flow rate precisely controllable and significantly improving the uniformity of flame coverage.

[0016] Furthermore, the clamping assembly includes two bidirectional lead screws and a second servo motor. The second servo motor is electrically connected to the controller. Both ends of the two bidirectional lead screws are rotatably connected to the inside of the heat insulation cover. The outer surface of the second servo motor is fixedly embedded in the outside of the furnace body. The output end of the second servo motor is fixedly connected to one end of the bidirectional lead screw. The outer surfaces of the two bidirectional lead screws are threaded with two symmetrical moving frames. Sprockets are fixedly connected to the outside of the two bidirectional lead screws. A transmission chain is sleeved on the outside of the two sprockets. The two sprockets are connected by transmission chain.

[0017] Through the above scheme, the linkage design of the bidirectional lead screw and the second servo motor, combined with the synchronous transmission of the sprocket by the transmission chain, enables the two bidirectional lead screws to rotate stably and synchronously, ensuring that the moving frame can move stably.

[0018] Furthermore, the inner sides of the two movable frames are threaded with second lead screws, one end of each of the two second lead screws is rotatably connected to a pressure plate, and the upper sides of each of the two pressure plates are fixedly connected with two guide rods, with the outer sides of the guide rods inserted into the inner side of the movable frame.

[0019] With the above scheme, the rotation of the second lead screw can drive the pressure plate to be raised and lowered. In conjunction with the guide design of the second lead screw, the pressure plate can stably clamp the fabric sample.

[0020] Furthermore, each of the two second lead screws has a handle fixedly connected to its other end, and the outer side of each handle is provided with anti-slip texture.

[0021] With the above scheme, the rotating handle can drive the second lead screw to rotate, thereby adapting to fabrics of different thicknesses and maintaining clamping stability, avoiding sample displacement or wrinkles, ensuring the repeatability and accuracy of combustion tests, and the anti-slip design on the surface can improve rotational stability and prevent slippage.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This fiber fabric flame retardancy testing device achieves multi-stage gas distribution within the distribution tube by using a Y-shaped guide plate and equidistantly arranged gas outlet pipes inside the distribution tube. Then, driven by the drive component and coordinated with the linkage adjustment of the first lead screw, baffle plate, and worm gear in the gas volume adjustment component, the opening volume of each gas outlet pipe can be controlled synchronously, so that the gas is evenly distributed to all gas outlet pipes, avoiding heating deviation caused by single-point flame concentration, and ensuring the realistic simulation of the overall combustion state of the fabric. Attached Figure Description

[0024] Figure 1 is a three-dimensional structural diagram of the entire application;

[0025] Figure 2 is a schematic cross-sectional view of the overall structure of this application;

[0026] Figure 3 is a three-dimensional structural diagram of the shunt tube and drive assembly of this application;

[0027] Figure 4 is a schematic diagram of the internal structure of the diversion pipe and the gas volume regulating component of this application;

[0028] Figure 5 is a three-dimensional structural diagram of the clamping component of this application.

[0029] In the picture:

[0030] 1. Furnace body; 2. Controller; 3. Heat insulation cover; 4. Diverter pipe; 5. Gas outlet pipe; 6. Gas volume adjustment component; 601. First lead screw; 602. Baffle plate; 603. Worm gear; 604. Guide groove; 7. Drive component; 701. First servo motor; 702. Rotating shaft; 703. Worm gear; 8. Clamping component; 801. Bidirectional lead screw; 802. Second servo motor; 803. Moving frame; 804. Sprocket; 805. Transmission chain; 806. Second lead screw; 807. Pressure plate; 808. Guide rod; 809. Rotary handle; 9. Gas transmission pipeline; 10. Gas dissipation groove; 11. Integrated igniter; 12. Sealing door; 13. Y-shaped guide plate. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please refer to Figures 2, 3, and 4. This embodiment of a fiber fabric flame retardancy testing device includes a furnace body 1. A controller 2 is fixedly installed on the upper side of the furnace body 1. A heat insulation cover 3 is fixedly connected inside the furnace body 1. A diversion pipe 4 is fixedly connected to the inner side of the heat insulation cover 3. Multiple equidistant gas outlet pipes 5 are fixedly connected to the inner side of the diversion pipe 4. An integrated igniter 11 is fixedly installed on the upper surface of the diversion pipe 4. The integrated igniter 11 and the controller 2 are electrically connected. A gas volume regulating component 6 is provided at the bottom of each gas outlet pipe 5. The gas volume regulating component 6 includes a first lead screw 601 rotatably connected to the inner side of the diversion pipe 4. One end of the first lead screw 601 extends through the inner side of the diversion pipe 4 to the outer side of the diversion pipe 4. One end of the first lead screw 601 is fixedly connected to... The gas flow regulating component 6 includes a worm gear 603, a baffle plate 602 threadedly connected to the outer side of the first lead screw 601, and a guide groove 604 opened inside the diversion pipe 4. The outer side of the baffle plate 602 is slidably connected to the inner wall of the guide groove 604. The guide groove 604 can precisely limit the movement of the baffle plate 602, ensuring that the baffle plate 602 can move in a directional manner to block the opening at the bottom of the gas outlet pipe 5. A drive component 7 is provided inside the heat insulation cover 3, and a clamping component 8 is provided inside the heat insulation cover 3. A Y-shaped guide plate 13 is fixedly connected to the inner side of the diversion pipe 4. The Y-shaped guide plate 13 can block and guide the gas delivered from the gas transmission pipeline 9 to the diversion pipe 4, thereby avoiding uneven gas pressure distribution in the diversion pipe 4.

[0033] Please refer to Figures 1 and 2. By setting the Y-shaped guide plate 13 to guide the flow, combined with the gas outlet pipes 5 arranged at equal intervals inside the diversion pipe 4, the gas is multi-stage diversion inside the diversion pipe 4. Then, driven by the drive component 7, and with the linkage adjustment of the first lead screw 601, baffle plate 602, and worm gear 603 in the gas volume adjustment component 6, the opening amount of each gas outlet pipe 5 can be controlled synchronously, so that the gas is evenly distributed to all gas outlet pipes 5, avoiding the heating deviation caused by single-point flame concentration, and ensuring the realistic simulation of the overall combustion state of the fabric. A gas transmission pipe 9 is fixedly installed inside the furnace body 1. One end of the gas transmission pipe 9 extends through the outer surface of the heat insulation cover 3 to the bottom surface of the diversion pipe 4. The inner wall of the gas transmission pipe 9 and the inner wall of the diversion pipe 4 are connected. Multiple gas dissipation slots 10 are provided on the side of the furnace body 1. A sealing door 12 is installed on the outer side of the furnace body 1. The inner side of the sealing door 12 is provided with light-transmitting and heat-insulating glass. The above-mentioned opening of the gas dissipation slots 10 and the light-transmitting and heat-insulating structure of the sealing door 12 can not only quickly discharge the combustion exhaust gas through the gas dissipation slots 10 to maintain the stability of the test environment, but also allow real-time observation of the flame status through the sealing door 12 to avoid safety hazards caused by high temperature interference, while ensuring the visual monitoring of the test process.

[0034] Please refer to Figures 2 and 3. The drive assembly 7 includes a first servo motor 701 and a rotating shaft 702. The outer surface of the first servo motor 701 is fixedly embedded in the outer surface of the furnace body 1. Both ends of the rotating shaft 702 are rotatably connected to the inner side of the heat insulation cover 3. The output end of the first servo motor 701 is fixedly connected to one end of the rotating shaft 702. The first servo motor 701 and the controller 2 are electrically connected. Multiple worm gears 703 are fixedly connected to the outer side of the rotating shaft 702. The first servo motor 701 drives the rotating shaft 702 to rotate the worm gears 703 and mesh with the worm wheel 603 to realize the synchronous displacement adjustment of all the baffles 602 in the gas volume adjustment assembly 6, ensuring that the opening volume of each gas outlet pipe 5 is strictly consistent. The number of worm gears 703 is adapted to the number of gas volume adjustment assemblies 6. The worm gears 703 and the worm wheel 603 mesh with each other. By setting the adaptability of the number of worm gears 703 and worm wheel 603, mechanical transmission errors are eliminated, making the gas flow rate precise and controllable, and significantly improving the uniformity of flame coverage.

[0035] Please refer to Figures 2 and 5. The clamping assembly 8 includes two bidirectional lead screws 801 and a second servo motor 802. The second servo motor 802 is electrically connected to the controller 2. Both ends of the two bidirectional lead screws 801 are rotatably connected to the inner side of the heat insulation cover 3. The outer surface of the second servo motor 802 is fixedly embedded in the outer side of the furnace body 1. The output end of the second servo motor 802 is fixedly connected to one end of the bidirectional lead screws 801. The outer surfaces of the two bidirectional lead screws 801 are threaded with two symmetrical moving frames 803. Sprockets 804 are fixedly connected to the outer side of each of the two bidirectional lead screws 801. A transmission chain 805 is sleeved on the outside of the two sprockets 804. The two sprockets 804 are connected by transmission chains 805. The above-mentioned linkage design between the bidirectional lead screws 801 and the second servo motor 802, combined with the synchronous transmission of the sprockets 804 by the transmission chain 805, enables the two bidirectional lead screws 801 to rotate stably and synchronously, ensuring movement. The frame 803 can move stably. The inner sides of the two movable frames 803 are threaded with second lead screws 806. One end of each of the two second lead screws 806 is rotatably connected to a pressure plate 807. The upper side of each of the two pressure plates 807 is fixedly connected to two guide rods 808, and the outer side of the guide rods 808 is inserted into the inner side of the movable frame 803. The rotation of the second lead screws 806 can drive the pressure plates 807 to adjust their height. With the guide design of the second lead screws 806, the pressure plates 807 can stably clamp the fabric sample. The other end of each of the two second lead screws 806 is fixedly connected to a handle 809. The outer side of each handle 809 is provided with anti-slip texture. The handles 809 can drive the second lead screws 806 to rotate, thereby adapting to fabrics of different thicknesses and maintaining clamping stability, avoiding sample displacement or wrinkling, ensuring the repeatability and accuracy of combustion tests. At the same time, the anti-slip design on the surface can improve rotational stability and prevent slippage.

[0036] This embodiment of the fiber fabric flame retardancy testing device achieves multi-stage gas diversion within the diversion pipe 4 by using the guiding effect of the Y-shaped guide plate 13 and the equally spaced gas outlet pipes 5 inside the diversion pipe 4. Then, under the drive of the drive component 7, and with the linkage adjustment of the first lead screw 601, the baffle plate 602, and the worm gear 603 in the gas volume adjustment component 6, the opening amount of each gas outlet pipe 5 can be controlled synchronously, so that the gas is evenly distributed to all gas outlet pipes 5, avoiding the heating deviation caused by the concentration of single-point flames, and ensuring the realistic simulation of the overall combustion state of the fabric.

[0037] It should be noted that, except for the second servo motor 802, all other surfaces of the clamping assembly 8 are coated with a high-temperature resistant ceramic coating, which can prevent heat conduction interference and further improve the stability of clamping.

[0038] The working principle of the above embodiment is as follows: When the gas transmission pipeline 9 delivers gas into the inside of the diversion pipe 4, it is evenly distributed to each gas outlet pipe 5 by the guiding effect of the Y-shaped guide plate 13. Then, the first lead screw 601 is driven by the drive assembly 7, which drives the worm gear 703 to rotate through the rotating shaft 702, so that the worm gear 603 synchronously adjusts the displacement of the baffle plate 602, controls the opening of each gas outlet pipe 5, and ensures that the gas is sprayed out evenly. After the integrated igniter 11 ignites the gas, the flame forms a uniform coverage through the gas outlet pipe 5. Then, the bidirectional lead screw 801 is driven by the drive assembly 7, which drives the worm gear 703 to rotate, so that the worm gear 703 synchronously adjusts the displacement of the baffle plate 602, controls the opening of each gas outlet pipe 5, and ensures that the gas is sprayed out evenly. After that, the integrated igniter 11 ignites the gas, and the flame forms a uniform coverage through the gas outlet pipe 5. The second servo motor 802 drives the rotation, which is synchronously transmitted through the transmission chain 805, causing the two moving frames 803 to move inward or outward synchronously. This allows for the adaptation of different sized fabric materials. Then, the rotating handle 809 rotates the second lead screw 806. With the guiding design of the second lead screw 806, the pressure plate 807 stably clamps the fabric sample to simulate combustion. At the same time, the gas dissipation groove 10 and the sealing door 12 work together to discharge exhaust gas and maintain the visibility environment. Finally, the controller 2 realizes full-process control to ensure the accuracy and safety of the test.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flame retardancy testing device for fiber fabrics, comprising a furnace body (1), characterized in that: A controller (2) is fixedly installed on the upper side of the furnace body (1). A heat insulation cover (3) is fixedly connected inside the furnace body (1). A diversion pipe (4) is fixedly connected to the inner side of the heat insulation cover (3). A plurality of equally spaced gas outlet pipes (5) are fixedly connected to the inner side of the diversion pipe (4). An integrated igniter (11) is fixedly installed on the upper surface of the diversion pipe (4). The integrated igniter (11) and the controller (2) are electrically connected. A gas volume regulating component (6) is provided at the bottom of each gas outlet pipe (5). The device includes a first lead screw (601) rotatably connected to the inside of the diversion pipe (4), one end of the first lead screw (601) extending through the inside of the diversion pipe (4) to the outside of the diversion pipe (4), a worm gear (603) fixedly connected to one end of the first lead screw (601), a baffle plate (602) threadedly connected to the outside of the first lead screw (601), a drive assembly (7) provided on the inside of the heat insulation cover (3), a clamping assembly (8) provided inside the heat insulation cover (3), and a Y-shaped guide plate (13) fixedly connected to the inside of the diversion pipe (4).

2. The flame retardancy testing device for fiber fabrics according to claim 1, characterized in that: The gas volume regulating component (6) also includes a guide groove (604) opened inside the diversion pipe (4), and the outer side of the baffle plate (602) is slidably connected to the inner wall of the guide groove (604).

3. The fiber fabric flame resistance test apparatus according to claim 1, characterized by: A gas transmission pipe (9) is fixedly installed inside the furnace body (1). One end of the gas transmission pipe (9) extends through the outer surface of the heat insulation cover (3) to the bottom surface of the diversion pipe (4). The inner wall of the gas transmission pipe (9) is connected to the inner wall of the diversion pipe (4). Multiple gas dissipation slots (10) are opened on the side of the furnace body (1). A sealing door (12) is installed on the outer side of the furnace body (1). The inner side of the sealing door (12) is provided with light-transmitting heat-insulating glass.

4. The fiber fabric flame resistance test apparatus according to claim 1, characterized by: The drive assembly (7) includes a first servo motor (701) and a rotating shaft (702). The outer surface of the first servo motor (701) is fixedly embedded in the outer surface of the furnace body (1). The two ends of the rotating shaft (702) are rotatably connected to the inner side of the heat insulation cover (3). The output end of the first servo motor (701) is fixedly connected to one end of the rotating shaft (702). The first servo motor (701) and the controller (2) are electrically connected. Multiple worm gears (703) are fixedly connected to the outer side of the rotating shaft (702).

5. The flame retardancy testing device for fiber fabrics according to claim 4, characterized in that: The number of worm gears (703) is adapted to the number of air volume regulating components (6), and the worm gears (703) and the worm wheel (603) mesh with each other.

6. The flame retardancy testing device for fiber fabrics according to claim 1, characterized in that: The clamping assembly (8) includes two bidirectional lead screws (801) and a second servo motor (802). The second servo motor (802) is electrically connected to the controller (2). Both ends of the two bidirectional lead screws (801) are rotatably connected to the inner side of the heat insulation cover (3). The outer surface of the second servo motor (802) is fixedly embedded in the outer side of the furnace body (1). The output end of the second servo motor (802) is fixedly connected to one end of the bidirectional lead screw (801). The outer surfaces of the two bidirectional lead screws (801) are threaded with two symmetrical moving frames (803). The outer sides of the two bidirectional lead screws (801) are fixedly connected with sprockets (804). The outer sides of the two sprockets (804) are fitted with transmission chains (805). The two sprockets (804) are connected by transmission chains (805).

7. The flame retardancy testing device for fiber fabrics according to claim 6, characterized in that: The inner sides of the two movable frames (803) are threaded with second lead screws (806), and one end of each of the two second lead screws (806) is rotatably connected to a pressure plate (807). The upper sides of the two pressure plates (807) are fixedly connected with two guide rods (808), and the outer side of the guide rods (808) is inserted into the inner side of the movable frame (803).

8. The flame retardancy testing device for fiber fabrics according to claim 7, characterized in that: The other end of each of the two second lead screws (806) is fixedly connected to a handle (809), and the outer side of each of the two handles (809) is provided with anti-slip texture.

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