Quantitative radiant heat heating box

Abstract

The utility model provides a quantitative radiation heat heating box which mainly comprises a box body, a radiation heat source, a heat flux meter, a heat screen and a driving device. A radiation chamber is arranged in the box body, and a radiation opening is formed in one side of the box body; the radiation heat source comprises a quartz heating pipe mounted in the radiation chamber; the heat flux meter is detachably installed on the outer side of the radiation opening and comprises a copper constantan thermocouple, a copper plate, a ceramic block and a fixing frame, the fixing frame is detachably connected with the box body, the ceramic block is fixedly installed on the fixing frame, the copper plate is fixedly installed on the ceramic block, and the copper constantan thermocouple is connected with the copper plate; the heat shield is provided with a heat insulation plate and a guide rod, one end of the guide rod is fixedly connected with the heat insulation plate, the other end is connected with the driving device, and the driving device drives the heat insulation plate to move to open or close the radiation opening. According to the utility model, the performance of the fire-fighting equipment in a high-temperature environment can be effectively evaluated and verified, and powerful technical support is provided for research and development and quality control of the fire-fighting equipment.

Description

Technical Field

[0001] The utility model relates to a heat radiation performance test of firefighter protective equipment, in particular to a quantitative radiation heat heating box. Background Art

[0002] At a fire scene, heat is transferred to the outside world through three primary pathways: conduction, convection, and radiation. Of these, thermal radiation is the most damaging factor. To ensure the safety of firefighters while performing their duties, their protective gear must offer robust resistance to radiant heat.

[0003] Currently, many standards for firefighter protective equipment in my country clearly stipulate requirements for evaluating the radiation resistance of products. These standards cover a wide range of protective equipment, including fire helmets, fire suits, fire gloves, and fire boots. To more accurately test the radiant thermal performance of this protective equipment, it is particularly important to develop advanced radiant thermal chambers. Such chambers can generate high radiant heat flux and provide relatively accurate radiant thermal data.

[0004] To better evaluate the protective performance of firefighter protective gear, using electric heating to generate a defined amount of radiant heat for both preheating and heating is a highly effective method. This method not only simulates the high-temperature environment of a fire scene but also ensures the accuracy and reliability of the test results. This ensures that firefighters' protective gear will provide adequate protection when facing a real fire, minimizing harm from thermal radiation. Utility Model Content

[0005] The utility model provides a quantitative radiant heat heating box for detecting the radiant heat performance of fire-fighting equipment. The quantitative radiant heat heating box includes:

[0006] The box body is provided with a radiation chamber, and a radiation port connected to the radiation chamber is opened on one side of the box body;

[0007] A radiation heat source, the radiation heat source comprises a quartz heating tube installed in the radiation chamber and facing the radiation port;

[0008] The heat flux meter is detachably mounted on the outside of the radiation port. The heat flux meter includes a copper-constantan thermocouple, a copper plate, a ceramic block, and a fixing frame. The fixing frame is detachably connected to the box. The ceramic block is fixedly mounted on the fixing frame. The copper plate is fixedly mounted on the side of the ceramic block close to the radiation chamber. The copper-constantan thermocouple is connected to the copper plate.

[0009] The heat insulation screen is provided with a heat insulation plate and a guide rod. One end of the guide rod is fixedly connected to the heat insulation plate, and the other end of the guide rod is connected to the driving device. The driving device drives the heat insulation plate to move between the radiation heat source and the heat flux meter to open or close the radiation port.

[0010] Furthermore, the radiation heat source is provided with 5 quartz heating tubes, each of which has a power of 200W, a resistance value of 50-100Ω, a tube diameter of 10mm, and a length of 200mm;

[0011] The radiation heat flux range of the radiation heat source is 0~100kW / m 2 .

[0012] Furthermore, an aluminum alloy reflecting bowl is installed in the radiation chamber. The reflecting bowl is threadedly connected to the inner wall of the box and is inverted at the radiation port. The radiation heat source is installed inside the concave surface of the reflecting bowl.

[0013] Furthermore, the fixing frame is connected to the box body through magnets, buckles or screws.

[0014] Furthermore, the heat insulation plate is provided with an opening, and the driving device drives the heat insulation plate to move so that the opening and the radiation port coincide with or are staggered.

[0015] Furthermore, the driving device includes a cylinder and a push rod. The cylinder is provided with a piston rod, and at least one pair of rollers are installed on the piston rod at intervals.

[0016] The push rod is slidably arranged between the two rollers. A slider is slidably installed on one end of the push rod. The slider is rotatably connected to the other end of the guide rod through a first pin shaft, and the other end of the push rod is rotatably connected to the box body through a second pin shaft.

[0017] Furthermore, the push rod is provided with a through slot for the piston rod to pass through.

[0018] Furthermore, a copper constantan thermocouple is connected to a digital display screen.

[0019] The advantages of the present invention are:

[0020] The quantitative radiant heat heating box of the utility model not only improves the testing efficiency and accuracy of firefighters' protective equipment, but also provides firefighters with a safer and more reliable means of testing and evaluating their protective equipment, thereby protecting their lives at the fire scene.

[0021] This utility model provides a compact, easy-to-use, and accurate radiant heat performance testing device, particularly suitable for testing the radiant heat resistance of firefighting equipment. This device can effectively evaluate and verify the performance of firefighting equipment in high-temperature environments, providing strong technical support for the development and quality control of firefighting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 It is a structural schematic diagram of a quantitative radiation heat heating box;

[0024] Figure 2 is a schematic diagram of a reflective bowl;

[0025] Figure 3 This is the structural composition diagram of the heat flux meter;

[0026] Figure 4 Schematic diagram of the structure of the heat insulation screen;

[0027] Figure 5 Schematic diagram of the structure of the push rod;

[0028] Figure 6 This is a schematic diagram of two pairs of rollers provided on the piston rod.

[0029] Numbers in the figure: 1-box, 2-radiation heat source, 3-reflection bowl, 4-heat flux meter, 5-heat insulation screen, 6-push rod, 7-cylinder, 8-roller, 9-copper constantan thermocouple, 10-ceramic block, 11-fixed frame, 12-copper plate, 13-heat insulation board, 14-guide rod, 15-slider, 16-radiation chamber, 17-opening, 18-through slot, 19-piston rod, 20-radiation port. DETAILED DESCRIPTION

[0030] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0031] In order to fully understand the present invention, detailed steps and detailed structures will be provided in the following description to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation methods.

[0032] Reference Figure 1-6As shown, the utility model provides a quantitative radiation heat heating box for detecting the radiation heat performance of fire-fighting equipment, which is characterized in that the quantitative radiation heat heating box mainly includes a box body 1, a radiation heat source 2, a heat flux meter 4, a heat insulation screen 5 and a driving device.

[0033] Box 1

[0034] The box 1 is provided with a radiation chamber 16, and a radiation port 20 connected to the radiation chamber 16 is provided on one side of the box 1. An aluminum alloy reflective bowl 3 is installed in the radiation chamber 16. The reflective bowl 3 is threadedly connected to the inner wall of the box 1 and is inverted at the radiation port. The radiant heat source 2 is installed inside the concave surface of the reflective bowl 3.

[0035] Radiant heat source 2

[0036] Radiant heat source 2 comprises quartz heating tubes installed within radiation chamber 16 and facing the radiation port. Radiant heat source 2 consists of five quartz heating tubes, each with a power output of 200W, a resistance of 50-100Ω, a tube diameter of 10mm, and a length of 200mm. These tubes are connected in parallel to a 220V power supply and generate heat radiation when powered. Adjusting the power supply voltage adjusts the radiant heat flux within a range of 0-100kW / m². 2 .

[0037] Heat flux meter 4

[0038] The heat flux meter 4 can be detachably mounted on the outside of the radiation port. The heat flux meter 4 includes a copper-constantan thermocouple 9, a copper plate 12, a ceramic block 10 and a fixing frame 11. The heat flux meter 4 is composed of a copper-constantan thermocouple 9, a copper plate 12, a ceramic block 10 and a fixing frame 11. The copper-constantan thermocouple 9 is welded to the center of the copper plate and is used to test the heat flux value generated by the radiation heat source 2. The copper plate 12 is adhered to the ceramic block 10 with an adhesive, and the ceramic block 10 is adhered to the fixing frame with an adhesive, and the fixing frame 11 is attracted to the box body by a magnet. The thickness of the copper plate 12 is 1.0 mm and the diameter is 50 mm. The diameter of the copper-constantan thermocouple 9 is 0.3 mm. The copper-constantan thermocouple 9 is connected to a digital display screen, which can intuitively display the radiation heat flux. The ceramic block 10 is made of ceramic fiber with a density of 0.15 g / cm 3 ~0.4g / cm 3 The thermal conductivity is between 0.075 and 0.15 W / (m·K) and the thickness is 30 mm. The fixing frame 11 is made of stainless steel. The heat flux meter can measure the radiant heat flux and adjust the input voltage of the radiant heat source 2 according to the actual required radiant heat flux to meet the needs.

[0039] Heat shield 5

[0040] The heat shield 5 comprises a heat shield 13 and a guide rod 14. The heat shield is a stainless steel frame with a ceramic fiberboard mounted in the middle. One end of the guide rod 14 is fixedly connected to the heat shield 13, while the other end is connected to a drive mechanism. An opening 17 is located at the top of the heat shield 13. When the drive mechanism moves the heat shield 13 upward, it shields the radiant heat source 2, preventing it from escaping the enclosure. When the heat shield 13 moves downward, the opening 17 faces the radiant heat source 2, allowing the radiant heat to escape.

[0041] Drive device

[0042] The drive device includes a cylinder 7 and a push rod 6. The cylinder 7 is fixed to the chassis 1 and is provided with a piston rod 19. Two pairs of upper and lower rollers 8 are installed on the piston rod 19 at intervals. The push rod 6 is slidably arranged between the two rollers 8. A slider 15 is slidably mounted on one end of the push rod 6. The slider 15 is rotatably connected to the other end of the guide rod 14 via a first pin. The other end of the push rod 6 is rotatably connected to the chassis 1 via a second pin.

[0043] One end of the roller 8 is a threaded structure connected to the piston rod 19 of the cylinder 7, and the other end is mounted with four wheels through a pin. Figure 1 As shown, the push rod 6 is provided with a through slot 18 for the piston rod 19 to pass through. The piston rod 19 passes through the through slot 18 and is clamped between the two pairs of rollers 8.

[0044] The cylinder 7 can pneumatically move the piston rod 19 up and down, and the four wheels roll up and down along the push rod 6, thereby driving the push rod 6 to swing.

[0045] The method of using the utility model is as follows:

[0046] 1) The heat flux meter 4 is detachably mounted on the outside of the radiation port.

[0047] 2) The heat insulation board 13 is moved to the bottom by the driving device, and the opening 17 of the heat insulation board 13 faces the radiation heat source 2.

[0048] 3) Turn on the radiation heat source 2, the quartz heating tube is heated after being energized, and the heat flux meter 4 is used to detect the radiation heat flux in real time.

[0049] 4) When the radiation heat flux reaches the set value, remove the heat flux meter 4 and magnetically mount the flat bracket containing the fire test sample (such as the fabric of the fire suit and other fireproof materials of fire equipment) on the outside of the radiation port for performance testing.

[0050] Compared with the prior art, the present invention has the following characteristics and advantages:

[0051] 1) It can be used for radiant heat pretreatment of various types of protective equipment such as fire helmets, firefighter protective clothing, protective gloves and protective boots to verify their radiant heat resistance.

[0052] 2) It can generate a certain amount of radiant heat and adjust the radiant heat flux by adjusting the voltage. It is easy to use, the radiant heat flux is accurate, and the operation is simple.

[0053] 3) The radiant heat source of this utility model is composed of multiple quartz heating tubes. This design not only improves heat uniformity but also allows for flexible adjustment of heat radiation intensity to suit different testing requirements. The high thermal efficiency and long life of the quartz heating tubes result in low operating costs and simplified maintenance. Furthermore, the electric heating method is environmentally friendly.

[0054] 4) The heat shield effectively controls the release and shielding of radiant heat, ensuring safety and accuracy during testing. Through precise control of the drive mechanism, the heat shield can quickly switch between shielding and releasing radiant heat, thereby achieving precise regulation of the radiant heat flux.

[0055] 5) The heat fluxmeter's rational design enables accurate measurement of radiant heat flux. The high sensitivity and stability of the copper-constantan thermocouple ensure the reliability of the measurement results. Furthermore, the digital display allows the operator to monitor the radiant heat flux in real time, facilitating timely adjustments to test conditions.

[0056] 6) The use of the reflective bowl further improves the utilization rate of radiant heat, so that the heat generated by the radiant heat source acts more concentratedly on the tested sample.

[0057] 7) The pneumatic cylinder and push rod design of the drive unit ensures smooth movement of the entire equipment's moving parts, low noise, and long service life. The pneumatic method not only improves the equipment's response speed, but also reduces the use of electrical components, further improving equipment safety.

[0058] 8) The whole set of equipment has a compact structure and occupies little space, making it suitable for laboratory use.

[0059] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A quantitative radiant heat heating box for testing the radiant heat performance of firefighting equipment, characterized in that: The quantitative radiation heat heating box includes: A box body (1), wherein a radiation chamber (16) is provided in the box body (1), and a radiation port connected to the radiation chamber (16) is opened on one side of the box body (1); A radiation heat source (2), the radiation heat source (2) comprising a quartz heating tube installed in the radiation chamber (16) and facing the radiation port; A heat flux meter (4), the heat flux meter (4) is detachably mounted on the outside of the radiation port, the heat flux meter (4) comprises a copper-constantan thermocouple (9), a copper plate (12), a ceramic block (10) and a fixing frame (11), the fixing frame (11) is detachably connected to the box (1), the ceramic block (10) is fixedly mounted on the fixing frame (11), the copper plate (12) is fixedly mounted on a side of the ceramic block (10) close to the radiation chamber (16), and the copper-constantan thermocouple (9) is connected to the copper plate (12); A heat shield (5) is provided with a heat shield (13) and a guide rod (14), one end of the guide rod (14) is fixedly connected to the heat shield (13), and the other end of the guide rod (14) is connected to a driving device, and the driving device drives the heat shield (13) to move between the radiation heat source (2) and the heat flux meter (4) to open or close the radiation port.

2. A quantitative radiant heat heating box according to claim 1, characterized in that: The radiation heat source (2) is provided with 5 quartz heating tubes, each of which has a power of 200W, a resistance of 50-100Ω, a tube diameter of 10mm, and a length of 200mm; The radiation heat flux of the radiation heat source (2) ranges from 0 to 100 kW / m 2 .

3. A quantitative radiant heat heating box according to claim 1, characterized in that: An aluminum alloy reflective bowl (3) is installed in the radiation chamber (16). The reflective bowl (3) is threadedly connected to the inner wall of the box (1) and is buckled upside down at the radiation port. The radiation heat source (2) is installed inside the concave surface of the reflective bowl (3).

4. A quantitative radiant heat heating box according to claim 1, characterized in that: The fixing frame (11) is connected to the box (1) via magnets, buckles or screws.

5. A quantitative radiant heat heating box according to claim 1, characterized in that: The heat insulation plate (13) is provided with an opening (17), and the driving device drives the heat insulation plate (13) to move so that the opening and the radiation port are overlapped or staggered.

6. A quantitative radiant heat heating box according to claim 5, characterized in that: The driving device comprises a cylinder (7) and a push rod (6). The cylinder (7) is provided with a piston rod (19). At least one pair of rollers (8) are installed on the piston rod (19) at intervals. The push rod (6) is slidably arranged between the two rollers (8), and a slider (15) is slidably installed on one end of the push rod (6). The slider (15) is rotatably connected to the other end of the guide rod (14) through a first pin shaft, and the other end of the push rod (6) is rotatably connected to the box (1) through a second pin shaft.

7. A quantitative radiant heat heating box according to claim 6, characterized in that: The push rod (6) is provided with a through slot for the piston rod (19) to pass through.

8. A quantitative radiant heat heating box according to claim 1, characterized in that: The copper-constantan thermocouple (9) is connected to a digital display screen.

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