Thermal radiation test device with adjustable test rack

Abstract

The invention relates to the technical field of fire reason investigation, and particularly discloses a heat radiation test device with an adjustable test rack, which comprises a heat radiation rack and a test rack, a radiation source is mounted on the heat radiation frame; the test rack is in a portal shape, the left end and the right end of the test rack are sleeved with sliding supports with the adjustable height respectively, and locking assemblies are installed on the sliding supports. The device further comprises a horizontally-arranged rotating rod, the two ends of the rotating rod are connected to the two rotating rods correspondingly, and a rotating assembly is installed on the rotating rod and rotates in the circumferential direction of the rotating rod. A fixing frame is installed on the rotating assembly and used for fixing a sample. The effect of adjusting the overall height of the fixing frame is achieved by adjusting the height of the sliding support, the angle of the fixing frame is adjusted through the upper rotating assembly, a sample can face a radiation source at different angles to conduct a heat radiation test, and an operator can more accurately simulate the state of the sample to test data according to post-disaster data.

Description

Technical Field

[0001] This invention relates to the field of fire cause investigation technology, specifically to an adjustable thermal radiation testing device. Background Technology

[0002] Fire protection research encompasses research on building fire theory, fire prevention of building structures, fire risk assessment, fire damage assessment of buildings, building smoke control and exhaust, automatic sprinkler systems, flame retardant technology and building fire protection, fire smoke toxicity evaluation, personnel evacuation, fire investigation techniques, fire trace evidence analysis techniques, natural disaster emergency rescue, and occupational safety and health of firefighters. It also undertakes the research and development of new fire-resistant building components and fire-retardant materials, as well as the testing of fire-resistant materials. Thermal radiation testing is a test used to analyze and determine the ignition source during post-fire investigations. It utilizes a radiation source to ignite potentially flammable or combustible samples at the fire scene to determine if they are ignition sources. After a fire occurs, simulation tests are conducted based on the on-site conditions, considering the radiation source, flammable or combustible samples, and their spatial relationships, to verify the ignition capability and conditions of the radiation source.

[0003] Existing thermal radiation testing equipment does not allow for convenient adjustment of the angle between the sample and the radiation source, preventing the sample from accurately simulating fire conditions during testing. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable thermal radiation testing device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: An adjustable thermal radiation testing device includes a thermal radiation frame and a test frame; a radiation source is installed on the thermal radiation frame; the test frame is gantry-shaped, and adjustable height sliding supports are respectively fitted on the left and right ends of the test frame, with locking components installed on the sliding supports; it also includes a horizontally arranged rotating rod, with its two ends respectively connected to the two sliding supports, and a rotating component installed on the rotating rod, the rotating component rotating around the circumference of the rotating rod; a fixing frame is installed on the rotating component, the fixing frame is used to fix the sample, and the rotation of the rotating component causes the sample to face the radiation source at different angles.

[0006] Furthermore, the rotating assembly includes a turbine fixedly mounted on the rotating rod, and a U-shaped rotating frame sleeved over the turbine. The two side plates of the U-shaped rotating frame are rotatably connected to the rotating rod. A first drive motor is installed inside the U-shaped rotating frame, and a worm gear is installed on the shaft of the first drive motor. The worm gear meshes with the turbine, enabling the first drive motor to control the rotation angle of the U-shaped rotating frame. A fixed frame is installed on the U-shaped rotating frame.

[0007] Furthermore, the mounting of the fixing frame on the U-shaped rotating frame specifically comprises: a fixing frame including a placement plate, with a first extension frame and a second extension frame mounted on the top and bottom of the placement plate, the first extension frame and the second extension frame having the same structure; an upper extension plate and a lower extension plate are respectively connected to the top and bottom of the U-shaped rotating frame, the first extension frame is connected to the upper extension plate, and the second extension frame is connected to the lower extension plate; the first extension frame includes a base frame, on which horizontally arranged upper and lower protrusions are mounted, the upper and lower protrusions together forming a track, and a space is provided between the upper and lower protrusions. The gear is mounted on the shaft of the second drive motor, which is fixedly mounted on the base frame. It also includes a left sliding block and a right sliding block, which are movably mounted on a track. A horizontal first rack is fixedly mounted on the left sliding block, with its bottom meshing with the top of the gear. A horizontal second rack is fixedly mounted on the right sliding block, with its top meshing with the bottom of the gear. When the gear rotates, the left and right sliding blocks move towards or away from each other. Both the left and right sliding blocks are equipped with clamping structures for clamping the sample.

[0008] Furthermore, the clamping structure includes a clamping plate and a first bolt. The first bolt passes through the left or right sliding block in a threaded connection. One end of the first bolt is rotatably connected to the clamping plate. Rotating the first bolt can adjust the clamping degree of the clamping plate relative to the left or right sliding block.

[0009] Furthermore, both the upper extension plate and the lower extension plate are vertically arranged; the first extension frame is connected to the upper extension plate specifically: the base frame of the first extension frame is slidably connected to the upper extension plate; the second extension frame is connected to the lower extension plate specifically: the base frame of the second extension frame is slidably connected to the lower extension plate; each base frame is equipped with a second bolt for locking the movement of the base frame relative to the upper or lower extension plate.

[0010] Furthermore, it also includes guide rails, and the heat radiation frame and test frame can all be slidably mounted on the guide rails, which are equipped with scale lines.

[0011] Furthermore, the radiation source consists of six carbon fiber heating tubes, each with a rated power of 500W, and the carbon fiber heating tubes are connected to a voltage regulator.

[0012] Furthermore, the heat radiation frame and test frame are coated with a low thermal conductivity coating to prevent them from absorbing heat.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: The thermal radiation frame is equipped with a radiation source, which is in a relatively fixed state. By adjusting the height of the sliding support, the overall height of the frame can be adjusted. In addition, the angle of the frame can be adjusted by the rotating component, so that the sample can face the radiation source at different angles to conduct thermal radiation tests. This allows operators to more accurately simulate the state of the sample based on post-disaster data to test the data. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the present invention.

[0015] Figure 2 This is a structural diagram of a heat radiation frame.

[0016] Figure 3 A structural diagram of the mounting bracket for the rotating assembly.

[0017] Figure 4 This is a front view of the mounting bracket.

[0018] Figure 5 This is a front view of the first extension frame.

[0019] Figure 6 This is a rear view of the first extension frame.

[0020] The labels in the diagram are as follows: 1-Guide rail, 2-Heat radiation frame, 21-Carbon fiber heating tube, 22-Voltage regulator, 3-Test frame, 4-Sliding support, 5-Rotating rod, 6-Rotating assembly, 61-Turbine, 62-U-shaped rotating frame, 63-First drive motor, 64-Worm gear, 65-Upper extension plate, 66-Lower extension plate, 7-Fixed frame, 71-Placement plate, 72-First extension frame, 721-Base frame, 722-Upper protrusion, 723-Lower protrusion, 724-Gear, 725-Left sliding block, 726-Right sliding block, 727-Second drive motor, 728-First rack, 729-Second rack, 73-Second extension frame, 8-First bolt, 9-Clamping plate, 10-Second bolt, 11-Third bolt. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, so as to provide a better understanding of the concept of the present invention, the technical problem solved, the technical features constituting the technical solution, and the technical effects brought about.

[0022] like Figure 1As shown, an adjustable thermal radiation testing device includes a thermal radiation frame 2 and a test frame 3. A radiation source is installed on the thermal radiation frame 2. The test frame 3 is gantry-shaped, and adjustable sliding supports 4 are respectively fitted on the left and right ends of the test frame 3. Locking components are installed on the sliding supports 4. The device also includes a horizontally arranged rotating rod 5, with its two ends connected to the two sliding supports 4 respectively. A rotating component 6 is installed on the rotating rod 5, and the rotating component 6 rotates around the circumference of the rotating rod 5. A fixing frame 7 is installed on the rotating component 6, which is used to fix the sample. The rotation of the rotating component 6 causes the sample to face the radiation source at different angles.

[0023] The purpose of this invention is as follows: a radiation source is installed on the thermal radiation frame 2, and the radiation source is in a relatively fixed state. By adjusting the height of the sliding support 4, the overall height of the fixed frame 7 can be adjusted. With the help of the rotating component 6 to adjust the angle of the fixed frame 7, the sample can face the radiation source at different angles to conduct thermal radiation tests. This allows the operator to more accurately simulate the state of the sample based on post-disaster data to test the data.

[0024] like Figure 3 As shown, the rotating assembly 6 further includes a turbine 61 fixedly mounted on the rotating rod 5, and a U-shaped rotating frame 62. The U-shaped rotating frame 62 is sleeved on the outside of the turbine 61, and its two side plates are rotatably connected to the rotating rod 5. A first drive motor 63 is installed inside the U-shaped rotating frame 62, and a worm gear 64 is installed on the shaft of the first drive motor 63. The worm gear 64 meshes with the turbine 61, allowing the first drive motor 63 to control the rotation angle of the U-shaped rotating frame 62. A fixed frame 7 is mounted on the U-shaped rotating frame 62. By controlling the first drive motor 63 to drive the worm gear 64 to rotate, and since the two side plates of the U-shaped rotating frame 62 are rotatably connected to the rotating rod 5, and the worm gear 64 meshes with the turbine 61, the rotation of the worm gear 64 causes the U-shaped rotating frame 62 to rotate along the circumference of the turbine 61, thereby completing the change of the pitch angle of the fixed frame 7 on the U-shaped rotating frame 62 facing the radiation source. The first drive motor 63 is a self-locking motor that can resist the movement tendency caused by the gravity of the U-shaped rotating frame 62 when stationary.

[0025] like Figures 4-6As shown, further, the mounting of the fixing frame 7 on the U-shaped rotating frame 62 specifically includes: the fixing frame 7 includes a placement plate 71, and a first extension frame 72 and a second extension frame 73 are mounted on the top and bottom of the placement plate 71, the first extension frame 72 and the second extension frame 73 having the same structure; the top and bottom of the U-shaped rotating frame 62 are respectively connected to an upper extension plate 65 and a lower extension plate 66, the first extension frame 72 is connected to the upper extension plate 65, and the second extension frame 73 is connected to the lower extension plate 66; the first extension frame 72 includes a base frame 721, on which horizontally arranged upper protrusions 722 and lower protrusions 723 are mounted, the upper protrusions 722 and lower protrusions 723 together forming a track, and a gear 72 is provided between the upper protrusions 722 and lower protrusions 723. 4. Gear 724 is mounted on the shaft of the second drive motor 727, which is fixedly mounted on the base frame 721. It also includes a left sliding block 725 and a right sliding block 726, which are movably mounted on a track. A horizontal first rack 728 is fixedly mounted on the left sliding block 725, with its bottom meshing with the top of the gear 724. A horizontal second rack 729 is fixedly mounted on the right sliding block 726, with its top meshing with the bottom of the gear 724. When gear 724 rotates, the left sliding block 725 and right sliding block 726 move towards or away from each other. Both the left and right sliding blocks 725 and 726 are equipped with clamping structures for clamping samples. The rotation of the second drive motor 727 will drive the gear 724 to rotate. The top of the gear 724 meshes with the first rack 728, and the bottom of the gear 724 meshes with the second rack 729. The rotation of the gear 724 will drive the left sliding block 725 and the right sliding block 726 to move towards or away from each other, thereby adjusting the left and right distance of the clamping structure. This allows the clamping point to be adjusted according to the width of the sample, resulting in a better clamping effect on the sample.

[0026] Furthermore, the clamping structure includes a clamping plate 9 and a first bolt 8. The first bolt 8 passes through the left sliding block 725 or the right sliding block 726 by means of a threaded connection. One end of the first bolt 8 is rotatably connected to the clamping plate 9. Rotating the first bolt 8 can adjust the clamping degree of the clamping plate 9 relative to the left sliding block 725 or the right sliding block 726.

[0027] Furthermore, both the upper extension plate 65 and the lower extension plate 66 are vertically oriented. Specifically, the first extension frame 72 is connected to the upper extension plate 65 with its base frame 721 slidably connected to it. Similarly, the second extension frame 73 is connected to the lower extension plate 66 with its base frame 721 slidably connected to it. Each base frame 721 is equipped with a second bolt 10 for locking its movement relative to either the upper or lower extension plate 65. Adjusting the left sliding block 725 and the right sliding block 726 adjusts the clamping point in the sample width direction. Adjusting the base frames 721 of the first and second extension frames on the upper and lower extension plates 65 and 66 respectively allows for adjustment of the clamping point in the length direction. Combined with the adjustment of the clamping point in the width direction, various different samples can be clamped.

[0028] Furthermore, the system includes a guide rail 1, a thermal radiation frame 2, and a test frame 3, all of which can be slidably mounted on the guide rail 1. The guide rail 1 has graduated lines. The guide rail 1 allows for adjustment of the thermal radiation frame 2 and the test frame 3, changing their relative distance. The graduated lines are used to determine the relative distance data, facilitating the recording of test data.

[0029] like Figure 2 As shown, the radiation source further comprises six carbon fiber heating tubes 21, each with a rated power of 500W. Each carbon fiber heating tube 21 is connected to a voltage regulator 22. The total power of the six carbon fiber heating tubes 21, each with a rated power of 500W, can be controlled between 0 and 3kW through the voltage regulator 22, reaching the current testing range for thermal radiation experiments and also suitable for thermal radiation fire hazard testing. The power cord connecting to the voltage regulator 22 is made of high-temperature resistant ceramic wire, passing through the inside of the thermal radiation frame 2 and connecting to the voltage regulator 22. A heat insulation plate is installed on the rear side of the carbon fiber heating tubes 21, and reflective material is installed on the heat insulation plate to prevent the loss of thermal radiation energy, in conjunction with its own heat insulation properties.

[0030] Furthermore, the thermal radiation frame 2 and the test frame 3 are coated with a low thermal conductivity coating to prevent them from absorbing heat. This prevents heat absorption and avoids transferring heat to the sample after absorption, thus affecting the sample testing.

[0031] During the experiment, it may be necessary to collect temperature data of the sample. A thermocouple can be added and installed on the test frame for operation. Thermocouples are existing technology, and their use is within the scope of what a person skilled in the art can achieve.

[0032] The terms "connection" and "fixing" appearing in the description of this invention can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this invention should be understood according to the specific circumstances.

[0033] In the description of this invention, the terms "center," "upper," "lower," "horizontal," "inner," and "outer," etc., are used only to indicate the orientation or positional relationship for the convenience of describing this invention and to simplify the description, and do not indicate or imply a specific orientation that the device or element referred to must have, and therefore should not be construed as a limitation of this invention.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable thermal radiation testing device, characterized in that: Includes a thermal radiation frame (2) and a test frame (3); A radiation source is installed on the heat radiation rack (2); The test frame (3) is in the shape of a gantry. Adjustable sliding supports (4) are respectively fitted on the left and right ends of the test frame (3). Locking components are installed on the sliding supports (4). It also includes a horizontally set rotating rod (5), with its two ends connected to two sliding supports (4) respectively. A rotating assembly (6) is installed on the rotating rod (5), and the rotating assembly (6) rotates around the circumference of the rotating rod (5). A fixing frame (7) is installed on the rotating assembly (6). The fixing frame (7) is used to fix the sample. The rotating assembly (6) rotates so that the sample faces the radiation source at different angles.

2. The adjustable thermal radiation testing device for a test frame according to claim 1, characterized in that: The rotating assembly (6) includes a turbine (61) fixedly mounted on the rotating rod (5). It also includes a U-shaped rotating frame (62), which is sleeved on the outside of the turbine (61), and the two side plates of the U-shaped rotating frame (62) are rotatably connected to the rotating rod (5); The U-shaped rotating frame (62) is equipped with a first drive motor (63), and a worm gear (64) is installed on the shaft of the first drive motor (63). The worm gear (64) meshes with the turbine (61) so that the first drive motor (63) controls the rotation angle of the U-shaped rotating frame (62). The fixed frame (7) is installed on the U-shaped rotating frame (62).

3. The adjustable thermal radiation testing device for a test frame according to claim 2, characterized in that: The fixing frame (7) is installed on the U-shaped rotating frame (62) specifically as follows: The mounting bracket (7) includes a placement plate (71), and a first extension bracket (72) and a second extension bracket (73) are mounted on the top and bottom of the placement plate (71). The first extension bracket (72) and the second extension bracket (73) have the same structure. The top and bottom of the U-shaped rotating frame (62) are respectively connected to an upper extension plate (65) and a lower extension plate (66). The first extension frame (72) is connected to the upper extension plate (65), and the second extension frame (73) is connected to the lower extension plate (66). The first extension frame (72) includes a base frame (721), on which horizontally arranged upper protrusions (722) and lower protrusions (723) are installed. The upper protrusions (722) and lower protrusions (723) together form a track. A gear (724) is provided between the upper protrusions (722) and lower protrusions (723). The gear (724) is installed on the shaft of the second drive motor (727). The second drive motor (727) is fixedly installed on the base frame (721). It also includes a left sliding block (725) and a right sliding block (726), which are movably mounted on the track; A horizontal first rack (728) is fixedly installed on the left sliding block (725), and the bottom of the first rack (728) meshes with the top of the gear (724); a horizontal second rack (729) is fixedly installed on the right sliding block (726), and the top of the second rack (729) meshes with the bottom of the gear (724); When the gear (724) rotates, the left sliding block (725) and the right sliding block (726) move toward or away from each other. Both the left sliding block (725) and the right sliding block (726) are equipped with clamping structures to clamp the sample.

4. The adjustable thermal radiation testing device for a test frame according to claim 3, characterized in that: The clamping structure includes a clamping plate (9) and a first bolt (8). The first bolt (8) passes through the left sliding block (725) or the right sliding block (726) in a threaded connection. One end of the first bolt (8) is rotatably connected to the clamping plate (9). Rotating the first bolt (8) can adjust the clamping degree of the clamping plate (9) relative to the left sliding block (725) or the right sliding block (726).

5. The adjustable thermal radiation testing device for a test frame according to claim 3, characterized in that: Both the upper extension plate (65) and the lower extension plate (66) are vertically arranged; The first extension frame (72) is connected to the upper extension plate (65) in such a way that the base frame (721) of the first extension frame (72) is slidably connected to the upper extension plate (65); The second extension frame (73) is connected to the lower extension plate (66) in such a way that the base frame (721) of the second extension frame (73) is slidably connected to the lower extension plate (66); Each base frame (721) is equipped with a second bolt (10) for locking the base frame (721) relative to the upper extension plate (65) or the lower extension plate (66).

6. The adjustable thermal radiation testing device for a test frame according to claim 1, characterized in that: It also includes a guide rail (1), a thermal radiation frame (2) and a test frame (3), all of which can be slidably mounted on the guide rail (1), and scale lines are provided on the guide rail (1).

7. The adjustable thermal radiation testing device for a test frame according to claim 1, characterized in that: The radiation source consists of six carbon fiber heating tubes (21), each with a rated power of 500W. The carbon fiber heating tubes (21) are connected to a voltage regulator (22).

8. The adjustable thermal radiation testing device for a test frame according to claim 1, characterized in that: The heat radiation frame (2) and the test frame (3) are coated with a low thermal conductivity coating to prevent the heat radiation frame (2) and the test frame (3) from absorbing heat.

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