Fireproof door smoke-proof performance testing device

Abstract

The utility model discloses a fireproof door smoke-proof performance testing device and relates to the technical field of testing devices. Comprising a test box for testing a fireproof door, a heating circulation mechanism arranged in the test box, a thermocouple mechanism arranged in the test box and used for collecting temperatures of multiple positions, and a pressure conversion mechanism arranged at the side part of the test box and used for adjusting the internal pressure of the test box. According to the utility model, the accuracy and the flexibility of the test are effectively improved, a plurality of tests with different standards can be adapted at the same time, and powerful support is provided for performance evaluation and technical progress in the fireproof door industry.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a testing device for the smoke prevention performance of fire doors. Background Technology

[0002] With the internationalization of building fire safety standards, the production of fire doors involves multiple standards, such as GB / T41480-2022 (China), BS-EN1634-3-2004 (EU), ISO 5925-1:2007 (International Organization for Standardization), and UL1784-2009 (Underwriters Laboratories, USA), among others. Traditional single-function testing devices suffer from poor standard compatibility, incomplete test parameters, and distorted environmental simulation, necessitating the development of a comprehensive testing system compatible with multiple standards. Utility Model Content

[0003] This utility model proposes a fire door smoke prevention performance testing device to solve the technical defects pointed out in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A fire door smoke prevention performance testing device includes a test chamber for testing fire doors, a heating circulation mechanism installed inside the test chamber, a thermocouple mechanism installed inside the test chamber for collecting temperatures at multiple locations, and a pressure conversion mechanism installed on the side of the test chamber for adjusting the internal pressure of the test chamber.

[0006] Furthermore, the test chamber includes a furnace body with a forward opening and a test frame detachably mounted on the opening side of the furnace body. The test frame is used to load the fire door to be tested. The opening side of the furnace body is provided with a double-layer sealing strip, and the inner side of the test frame is squeezed and sealed with the double-layer sealing strip.

[0007] Furthermore, a pressure sampling probe is provided on the side of the furnace body. The pressure sampling probe detects the pressure inside the furnace through a micro differential pressure sensor. The furnace body is lined with an insulation layer composed of double-sided rock wool tongue-and-groove sandwich panels. A measurement door is provided on the side of the furnace body to facilitate entry into the test chamber to observe various test parameters.

[0008] Furthermore, the furnace body opening side is hinged with a threaded locking element, and the test frame is provided with a locking block at the corresponding position.

[0009] Furthermore, the heating circulation mechanism includes a heating inner frame, heating tubes arranged in the heating inner frame, and a centrifugal fan arranged on the heating inner frame. The heating inner frame is provided with an air circulation hole communicating with the furnace body.

[0010] Furthermore, the thermocouple mechanism includes a vertically arranged fixed profile, a horizontally arranged movable profile, and a thermocouple fixing tube adjustablely arranged on the movable profile. The fixed profile is fixed to the heating inner frame by a fixing plate. The movable profile and the fixed profile form a rectangular frame structure. The movable profile can be adjusted up and down, and the thermocouple fixing tube can be adjusted left, right, front and back.

[0011] Furthermore, the pressure conversion mechanism includes a gas supply and extraction system that can switch between positive and negative pressure, and the gas supply and extraction system is linked to the pressure sampling probe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model integrates a detachable test frame and double-layer sealing strip to ensure sealing, a heating circulation mechanism to achieve temperature control, a flexibly adjustable thermocouple mechanism to accurately collect temperature data from multiple locations, and a pressure transformation mechanism to accurately adjust the furnace pressure based on feedback from the pressure sampling probe. This effectively improves the accuracy and flexibility of the test, and can simultaneously adapt to tests of multiple different standards, providing strong support for performance evaluation and technological advancement in the fire door industry. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the heating circulation mechanism of this utility model;

[0019] Figure 5 This is a schematic diagram of the thermocouple mechanism of this utility model. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1-5 As shown, a fire door smoke prevention performance testing device includes a test chamber 1 for testing fire doors, a heating circulation mechanism 2 installed in the test chamber 1, a thermocouple mechanism 3 installed in the test chamber 1 for collecting temperatures at multiple locations, and a pressure conversion mechanism 4 installed on the side of the test chamber 1 for adjusting the internal pressure of the test chamber 1.

[0025] This invention provides a closed testing environment through a test chamber 1, utilizes a heating circulation mechanism 2 to simulate the high-temperature conditions of a fire scene, and employs a thermocouple mechanism 3 to accurately collect temperature data from multiple locations within the test chamber to ensure temperature field uniformity and temperature control accuracy. Simultaneously, a pressure transformation mechanism 4 flexibly adjusts the internal pressure of the test chamber according to testing standards, simulating different fire pressure environments. This invention effectively solves the problem of multi-standard compatibility, improves temperature control accuracy and temperature field uniformity, achieves stable control of multiple pressure differences, and reduces temperature and pressure coupling interference, thereby ensuring accurate testing of the smoke-proof performance of fire doors and improving testing efficiency and reliability.

[0026] Specifically, as shown in the figure, the test chamber 1 includes a furnace body 11 with a forward opening and a test frame 12 detachably disposed on the opening side of the furnace body 11. The test frame 12 is used to load the fire door to be tested. A double-layer sealing strip 16 is provided on the opening side of the furnace body 11, and the inner side of the test frame 12 is squeezed and sealed with the double-layer sealing strip 16.

[0027] The test chamber 1 mainly consists of a furnace body 11 and a detachable test frame 12. The furnace body 11 has a forward-facing opening for installing and testing fire doors. The test frame 12 is used to load the fire door to be tested and can be tightly installed on the opening side of the furnace body 11.

[0028] To achieve airtightness under high-temperature testing conditions, a double-layer sealing strip 16 is installed on the open side of the furnace body 11. When the test frame 12 is installed in place, its inner side will be tightly pressed against the double-layer sealing strip 16 to form an effective sealing structure. The double-layer sealing structure not only improves the reliability of the seal but also effectively prevents the leakage of flue gas and heat under high temperatures, ensuring the stability and accuracy of the testing environment. In addition, the detachable test frame 12 makes the testing process more flexible and convenient. Operators can quickly replace different fire doors as needed for testing, greatly improving testing efficiency and equipment utilization. The open side of the furnace body 11 is hinged with a threaded locking member 14, and the test frame 12 is equipped with a corresponding locking block 15. During installation, the fire door is installed on the test frame 12, and the test frame 12 is aligned and installed flush with the opening of the furnace body 11. By rotating the threaded locking member 14, it is locked into the locking block 15. Tightening the threaded locking member 14 fixes the test frame 12.

[0029] It is worth mentioning that in existing technologies, experimental devices generally do not use sealing strips, or only use single-layer sealing strips, meaning that the sealing performance of existing experimental devices is insufficient. The sealing strip in this invention has a double-layer structure, which achieves a significantly better sealing effect.

[0030] Specifically, as shown in the figure, a pressure sampling probe 18 is installed on the side of the furnace body 11. The pressure sampling probe 18 detects the pressure inside the furnace through a micro differential pressure sensor. The furnace body 11 is lined with an insulation layer 17 composed of double-sided rock wool tongue-and-groove sandwich panels. A measurement door 13 is provided on the side of the furnace body 11 to facilitate entry into the test chamber to observe various test parameters. The pressure sampling probe 16 is 100±10mm away from the inner surface of the sample. The micro differential pressure sensor accurately measures the pressure inside the furnace. The double-sided rock wool tongue-and-groove sandwich panels are used to form the insulation layer to reduce heat loss, and the measurement door is provided to facilitate observation and adjustment of test parameters, ensuring the stability and accuracy of the test environment.

[0031] Specifically, as shown in the figure, the heating circulation mechanism 2 includes a heating inner frame 21, heating tubes 22 arranged in the heating inner frame 21, and a centrifugal fan 23 arranged on the heating inner frame 21. The heating inner frame 21 is provided with an air circulation hole 24 that communicates with the furnace body 11.

[0032] The heat circulation mechanism 2 consists of a heating inner frame 21, heating elements 22, and a centrifugal fan 23. The heating elements 22 are arranged within the heating inner frame 21 to generate heat to simulate the high-temperature environment of a fire scene. The centrifugal fan 23 is mounted on the heating inner frame 21; its rotation generates airflow that draws hot air from the heating inner frame 21 into the furnace body 11 through air circulation holes 24, achieving hot air circulation. This not only improves heating efficiency but also ensures the uniformity and stability of the temperature field within the furnace body 11. Simultaneously, the air circulation holes 24 enhance heat exchange between the furnace body 11 and the heating circulation mechanism 2, further improving the accuracy and reliability of the test.

[0033] Specifically, as shown in the figure, the thermocouple mechanism 3 includes a vertically arranged fixed profile 31, a horizontally arranged movable profile 33, and a thermocouple fixing tube 34 adjustablely arranged on the movable profile 33. The fixed profile 31 is fixed to the heating inner frame 21 by a fixing plate 32. The movable profile 33 and the fixed profile 31 form a rectangular frame structure. The movable profile 33 can be adjusted up and down, and the thermocouple fixing tube 34 can be adjusted left, right, front and back.

[0034] The movable and fixed profiles form a rectangular frame structure, and the movable profile can be adjusted vertically. This allows the height of the thermocouple mounting tube to be adjusted as needed to accommodate measurement points at different heights. The thermocouple mounting tube can also be adjusted horizontally, backward, and forward, enabling the thermocouple to be precisely positioned at the required measurement location, thereby improving the accuracy and reliability of the measurement.

[0035] Specifically, as shown in the figure, the pressure conversion mechanism 4 includes a switchable positive and negative pressure gas supply and extraction system, which is linked to the pressure sampling probe 18. The pressure conversion mechanism 4 mainly consists of the switchable positive and negative pressure gas supply and extraction system, which is linked to the pressure sampling probe 18. The gas supply and extraction system can provide positive or negative pressure environments to the test chamber 1 as needed, simulating different fire pressure scenarios. The pressure sampling probe 18 is responsible for real-time monitoring of the furnace pressure and feeding back the pressure signal to the gas supply and extraction system.

[0036] In actual operation, the gas supply and extraction system will be activated when the pressure inside test chamber 1 needs to be changed. If the pressure needs to be increased (i.e., positive pressure), the system will supply gas into test chamber 1; if the pressure needs to be decreased (i.e., negative pressure), the system will perform an extraction operation. During this process, the output of the gas supply and extraction system will be precisely adjusted according to the feedback from the pressure sampling probe 18 to ensure that the pressure inside test chamber 1 reaches the preset value and remains stable.

[0037] The pressure conversion mechanism 4 enables precise control and adjustment of the internal pressure of the test chamber 1, providing the necessary pressure environment for testing the smoke-proof performance of the fire door. Simultaneously, its linkage with the pressure sampling probe 18 ensures the accuracy and stability of pressure control, improving the reliability and accuracy of the test. It is worth noting that the pressure conversion mechanism 4 is a commonly used device in the field of testing equipment; those skilled in the art can obtain its specific structure and principle by consulting relevant literature, therefore it will not be elaborated upon here.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the smoke resistance of a fire door, characterized in that The test box for testing fireproof door, heating circulation mechanism arranged in the test box, thermocouple mechanism arranged in the test box for collecting temperature of multiple positions, and pressure conversion mechanism arranged at side of the test box for adjusting pressure in the test box.

2. The fire door smoke resistance performance test device according to claim 1, wherein, The test box comprises a furnace body with a forward opening, and a test frame detachably arranged at the opening side of the furnace body for loading fireproof door to be tested, and a double-layer sealing strip arranged at the opening side of the furnace body, and the inner side of the test frame is extruded and sealed with the double-layer sealing strip.

3. The fire door smoke resistance performance test device according to claim 2, wherein, A pressure sampling probe is arranged at the side of the furnace body, the pressure sampling probe detects the pressure in the furnace through a differential pressure sensor, a heat preservation layer composed of double-sided rock wool tongue-and-groove sandwich panels is laid in the furnace body, and a measuring door is arranged at the side of the furnace body for facilitating observation of various test parameters in the test box.

4. The fire door smoke resistance performance test device according to claim 3, wherein A threaded lock piece is hingedly arranged at the opening side of the furnace body, and a lock block is arranged at the corresponding position of the test frame.

5. The fire door smoke resistance performance test device according to claim 4, wherein The heating circulation mechanism comprises a heating inner frame, heating pipes arranged in the heating inner frame, and a centrifugal fan arranged on the heating inner frame, and the heating inner frame is provided with air circulation holes communicated with the furnace body.

6. The fire door smoke resistance performance test device according to claim 5, wherein The thermocouple mechanism comprises a vertically arranged fixed profile, a horizontally arranged movable profile, and a thermocouple fixing tube adjustably arranged on the movable profile, the fixed profile is fixed with the heating inner frame through a fixed plate, the movable profile and the fixed profile form a rectangular frame structure, the movable profile can be adjusted in position up and down, and the thermocouple fixing tube can be adjusted in position left and right and front and back.

7. The fire door smoke resistance performance test device according to claim 6, wherein The pressure conversion mechanism comprises a gas supply and exhaust system capable of switching positive and negative pressure, and the gas supply and exhaust system is linked with the pressure sampling probe.

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