Fire-fighting sprinkler head dynamic thermal test thermo-sensitive element jump judgment device

Abstract

The invention discloses a thermal sensitive element jump judgment device for a dynamic thermal test of a fire-fighting sprinkler head, relates to the technical field of fire-fighting part detection equipment, and is used for testing the response performance of the fire-fighting sprinkler head. The device comprises a shell, a test piece mounting seat, a jump judgment mechanism and a plunger, the jump judgment mechanism comprises an elastic pressure applying assembly and a conductive detection assembly, a ceramic insulation ejector rod is sleeved with a stainless steel compression spring, after a test element is mounted, the spring is compressed to apply a preset load, and meanwhile high-temperature electric leakage is avoided; the conductive detection assembly forms a loop through the wire lug, the switch nut and the conductive material part, and the spring resets to trigger the loop to be conducted after the element jumps. The test piece mounting base is detachable and adapts to fire sprinkler heads of different specifications, the device is compact in structure, jumping judgment is accurate and free of lag, the problems that manual observation lags and recording errors are large in a traditional device are effectively solved, and the device is suitable for static action temperature testing of the fire sprinkler heads.

Description

Technical Field

[0001] This invention relates to the field of fire protection component testing equipment technology, specifically to a device for judging the jump of heat-sensitive elements in dynamic thermal testing of fire sprinkler heads. Background Technology

[0002] The static and dynamic operating temperatures of fire-fighting thermal sensitive elements are core indicators for measuring their fire-fighting reliability. High-temperature tests are required to simulate fire environments and accurately record the temperature and operating time when the element trips (melts / breaks) in order to verify whether its response performance meets the standard requirements.

[0003] Existing jump detection devices for this type of test have two insurmountable core defects: First, the method for determining the meltdown of fire sprinkler heads under high-temperature conditions is outdated, relying heavily on manual observation or indirect temperature measurement to deduce the jump state, which has a significant lag and cannot capture the jump instant in real time, resulting in large errors in the recording of action time and seriously affecting the accuracy of test data; Second, the lack of effective insulation design makes the insulation performance of components prone to failure under high-temperature conditions, easily leading to leakage interference, further damaging the stability of the conductive detection signal, and exacerbating the risk of distortion in jump detection.

[0004] These core deficiencies prevent existing devices from meeting the requirements of data accuracy and signal stability for fire protection test element testing, making them unsuitable for the stringent demands of production testing, quality supervision, and other scenarios. Therefore, there is an urgent need to develop a test element transition detection device for high-temperature environments that offers real-time, accurate transition judgment and reliable insulation protection, in order to address the shortcomings of existing technologies. Summary of the Invention

[0005] This invention aims to solve the following technical problems of existing fire test element tripping judgment devices: 1. Tripping judgment relies on manual observation or indirect detection, which has a lag and large error in recording action time; 2. It lacks effective insulation design, is prone to leakage interference at high temperatures, and has poor stability of conductive detection signal.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A device for judging the thermal response of a fire sprinkler head's thermal sensitive element in dynamic thermal testing is provided. The device includes a housing, a specimen mounting base disposed on the upper end of the housing, and a thermal response judging mechanism disposed between the housing and the specimen mounting base for cooperation with the fire sprinkler test element. The thermal response judging mechanism applies a preset load to the installed fire sprinkler head thermal sensitive element and simultaneously detects the melting state of the specimen through conductivity testing.

[0008] Furthermore, the jump judgment mechanism includes an elastic pressure application component for applying a preset load to the thermal element of the fire sprinkler head, and a conductivity detection component for conducting conductivity detection in cooperation with the elastic pressure application component, the housing, and the test specimen mounting base.

[0009] Furthermore, the housing is a cylindrical structure with vertical movement space, the specimen mounting base is installed at the upper opening of the housing, and a test cavity for adapting and installing the fire protection test element is provided directly above the specimen mounting base.

[0010] Furthermore, the elastic pressure application component is coaxially fitted with the specimen mounting base and includes an insulating top rod movably disposed in the vertical movable space, a pressure block disposed at the top of the insulating top rod, and a compression spring sleeved on the outside of the insulating top rod. The upper end of the insulating top rod movably extends into the test cavity, and the two ends of the compression spring abut against the pressure block and the bottom side of the test cavity, respectively. After the test element is installed, the pressure block is pushed down to compress the compression spring, generating a continuous elastic force to apply a preset load.

[0011] Furthermore, the conductive detection component includes a first conductive element disposed at the lower end of the insulating top rod and a second conductive element disposed at the lower end of the housing. When the test element does not change, the first conductive element and the second conductive element are not connected, forming an open circuit. After the test element changes, the compression spring resets, causing the first conductive element and the second conductive element to become connected, forming a circuit.

[0012] Furthermore, a plunger is connected to the lower opening of the housing, and a wire outlet is vertically provided in the middle of the plunger. The first conductive element and the second conductive element extend from the wire outlet through the wire to form a detection circuit with the external power supply and timing device.

[0013] Furthermore, the first conductive element is a first lug, which is fixed to the lower end of the insulating top rod by a switch nut. The second conductive element is a second lug, which is fixedly connected to the plunger. The plunger, the housing, the specimen mounting base, and the switch nut are all made of conductive materials. After the test element jumps, the compression spring resets and drives the switch nut to move upward and contact the lower end of the specimen mounting base, forming a conductive path of second lug-plunger-housing-specimen mounting base-switch nut-first lug.

[0014] Furthermore, the insulating top rod is made of ceramic material, and there is a gap between the outer diameter of the insulating top rod and the inner wall of the specimen mounting base.

[0015] Furthermore, the housing, specimen mounting base, plunger, and compression spring are all made of stainless steel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention ensures insulation performance under high-temperature environments through a ceramic insulating rod, avoiding leakage interference with conductive detection signals. A preset load is stably applied to the fire protection test element using a compression spring. Simultaneously, a linkage structure consisting of conductive components, lugs, and a switch nut enables real-time conduction triggering at the moment of transition. This completely solves the problems of lag and large errors in recording action time that rely on manual observation in traditional devices. Furthermore, the test piece mounting base is detachable to adapt to different specifications of fire sprinkler heads. The overall structure is compact, stable, and provides accurate and reliable testing, meeting the core requirements for static action temperature testing of fire protection test elements. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention;

[0020] Figure 2 This is an exploded view diagram of an embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention;

[0022] In the diagram: 1-Fire test element, 2-House, 3-Specimen mounting base, 4-Plunger, 5-Test cavity, 6-Vertical movement space, 7-Insulating top rod, 8-Pressure block, 9-Compression spring, 10-Second lug, 11-Switch nut, 12-First lug, 13-Wire. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, 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 invention 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 invention.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0027] like Figure 1-3 As shown, the present invention proposes a dynamic thermal test thermal sensitive element jump judgment device for fire sprinkler heads, which is used to test the response performance of fire test element 1. It includes a housing 2, a test piece mounting base 3, a jump judgment mechanism and a plunger 4. The components work together to realize the installation of the test element, the application of the preset load and the detection of the jump state.

[0028] Shell 2: As the core supporting component, it is made of stainless steel in a cylindrical structure, which combines high temperature resistance, mechanical strength and electrical conductivity. The interior of shell 2 forms a vertical moving space 6, providing a stable moving channel for the insulating top rod 7; the upper opening is used to install the specimen mounting seat 3, and the lower opening cooperates with the plunger 4 to achieve structural closure. The overall structure is compact and ensures accurate positioning of each component.

[0029] Specimen mounting base 3: Made of stainless steel, it is detachably fixed to the upper opening of the housing 2, facilitating the replacement of the appropriate model according to the specifications of the test element. A test cavity 5 is provided directly above the specimen mounting base 3, precisely matching the shape of the fire protection test element 1, enabling rapid positioning and stable installation. Simultaneously, as an important component of the conductive path, it ensures stable conductivity. In this embodiment, the fire protection test element 1 is threadedly connected to the specimen mounting base 3.

[0030] Jump detection mechanism: Integrating elastic pressure application and conductivity detection functions, it is a core component that addresses the shortcomings of existing technologies, including elastic pressure application components and conductivity detection components.

[0031] Elastic pressure assembly: Coaxially mounted with the specimen mounting base 3, including an insulating top rod 7, a pressure block 8, and a compression spring 9. The insulating top rod 7 is made of ceramic, possessing both high-temperature resistance and excellent insulation properties, fundamentally preventing high-temperature leakage interference. Its outer diameter has a reasonable gap with the inner wall of the specimen mounting base 3, ensuring smooth axial movement without radial wobble. The pressure block 8 is made of stainless steel and fixed to the top of the insulating top rod 7, tightly fitting against the bottom surface of the test element to uniformly transfer the load. The compression spring 9 is sleeved on the outside of the insulating top rod 7, with its two ends abutting against the pressure block 8 and the bottom side of the test cavity 5, respectively. After the test element is installed, its mechanical strength resists the spring force, pushing the pressure block 8 downwards to compress the spring and store energy, generating a continuous elastic restoring force as the preset load. The load can be flexibly adjusted by replacing the compression spring 9 with different elastic coefficients to adapt to different test requirements.

[0032] The conductivity detection assembly includes a first conductive element 12, a second conductive element 10, a switch nut 11, and a wire 13. The first conductive element 12 is a first lug, fixed to the lower end of the insulating rod 7 by the switch nut 11; the second conductive element 10 is a second lug, fixed to the upper surface of the plunger 4 to ensure stable conductivity. When the test element does not change, the switch nut 11 maintains a distance from the lower end of the test piece mounting base 3, and the two are in an open circuit; after the test element changes at high temperature, the constraint on the pressure block 8 is released, the compression spring 9 resets and pushes the insulating rod 7 upward, and the switch nut 11 contacts the lower end of the test piece mounting base 3, forming a complete conductive path, realizing real-time triggering of the change signal, and completely eliminating the lag of manual observation or indirect detection.

[0033] Plunger 4: Made of stainless steel, it is fixedly connected to the lower opening of the housing 2. It is mainly used to support the second conductive element 10 and provide a channel for wires to lead out. A wire outlet hole is provided in the middle of the plunger 4 for the wire 13 to pass through. The wire 13, together with the external power supply and timing device, forms an independent detection circuit and is electrically isolated from the main circuit to avoid external interference and further improve the reliability of the detection signal.

[0034] It is worth mentioning that the fire test element 1 tested by this device is specifically a fire sprinkler head. Its core triggering component can be made of glass bulb or fusible metal. The structural characteristics of this type of component are highly compatible with the jump judgment mechanism of this device. This device can accurately detect its melting or breaking response performance in high temperature environment, thus meeting the core requirements of static action temperature testing of fire sprinkler heads.

[0035] Specifically, the specific implementation process of this invention is as follows:

[0036] Test element installation: Insert the fire sprinkler head thermal element 1 into the test cavity 5, push the pressure block 8 down to compress the compression spring 9 and apply the preset load. At this time, the switch nut 11 separates from the lower end of the test piece mounting base 3 and is in an open circuit state.

[0037] High-temperature test start-up: Place the device in the high-temperature test chamber, so that the fire sprinkler head is in a uniform heating area, and start the heating program and external detection circuit.

[0038] Jump detection and recording: After the fire sprinkler head's thermal element reaches the rated operating temperature, it jumps, the compression spring 9 resets and pushes the insulating top rod 7 upward, the switch nut 11 contacts the test piece mounting base 3 to form a circuit, and the trigger timing device records the jump time and corresponding temperature in real time.

[0039] Test completion: After the test is completed, the cooling device is cooled, the parts are disassembled for cleaning and the fire sprinkler head is removed, and the test is completed.

[0040] The device in this embodiment has a compact structure and accurate detection, and can be widely used for high-temperature jump performance testing of fire protection test components. It is compatible with various fire protection equipment testing standards and has significant practical value and promotion prospects.

[0041] This invention ensures insulation performance under high-temperature environments through a ceramic insulating top rod, avoiding leakage interference with conductive detection signals. A preset load is stably applied to the fire test element 1 using a compression spring. Simultaneously, a linkage structure consisting of conductive components, lugs, and switch nuts enables real-time conduction triggering at the moment of transition. This completely solves the problems of lag and large error in recording action time that traditional devices rely on manual observation. Furthermore, the test piece mounting base is detachable to adapt to different specifications of fire sprinkler heads. The overall structure is compact and stable, and the detection is accurate and reliable, meeting the core requirements of static action temperature testing for the fire test element 1.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0043] 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 judging the jump of a heat-sensitive element in a dynamic thermal test of a fire sprinkler head, used for testing the thermal response performance of a heat-sensitive element in a fire sprinkler head, characterized in that, It includes a housing, a specimen mounting base disposed on the upper end of the housing, and a jump detection mechanism disposed between the housing and the specimen mounting base for cooperating with the fire sprinkler head. The jump detection mechanism is used to apply a preset load to the heat-sensitive element of the installed fire sprinkler head and simultaneously detect the melting state of the specimen through conductivity testing.

2. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 1, characterized in that, The jump judgment mechanism includes an elastic pressure application component for applying a preset load to the heat-sensitive element of the fire sprinkler head, and a conductivity detection component for conducting conductivity detection in cooperation with the elastic pressure application component, the housing, and the test specimen mounting base.

3. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 2, characterized in that, The housing is a cylindrical structure with vertical movement space. The specimen mounting base is installed at the upper opening of the housing. A test cavity for adapting and installing the fire protection test element is provided directly above the specimen mounting base.

4. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 3, characterized in that, The elastic pressure application component is coaxially fitted with the specimen mounting base and includes an insulating top rod movably disposed in the vertical movable space, a pressure block disposed at the top of the insulating top rod, and a compression spring sleeved on the outside of the insulating top rod. The upper end of the insulating top rod movably extends into the test cavity, and the two ends of the compression spring abut against the pressure block and the bottom side of the test cavity, respectively. After the test element is installed, the pressure block is pushed down to compress the compression spring, generating a continuous elastic force to apply a preset load.

5. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 4, characterized in that, The conductive detection component includes a first conductive element located at the lower end of the insulating top rod and a second conductive element located at the lower end of the housing. When the test element does not change, the first conductive element and the second conductive element are not connected, forming an open circuit. After the test element changes, the compression spring resets, causing the first conductive element and the second conductive element to become connected, forming a circuit.

6. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 5, characterized in that, The lower end opening of the housing is connected to a plunger, and a wire outlet hole is vertically provided in the middle of the plunger. The first conductive element and the second conductive element extend out of the wire outlet hole through wires to form a detection circuit with the external power supply and timing device.

7. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 6, characterized in that, The first conductive element is a first lug, which is fixed to the lower end of the insulating top rod by a switch nut. The second conductive element is a second lug, which is fixedly connected to the plunger. The plunger, the housing, the specimen mounting base, and the switch nut are all made of conductive materials. After the test element jumps, the compression spring resets and drives the switch nut to move upward and contact the lower end of the specimen mounting base, forming a conductive path of second lug-plunger-housing-specimen mounting base-switch nut-first lug.

8. The device for judging the jump of the heat-sensitive element in the dynamic thermal test of a fire sprinkler head according to claim 4, characterized in that, The insulating top rod is made of ceramic material, and a gap is left between the outer diameter of the insulating top rod and the inner wall of the specimen mounting base.

9. A device for judging the jump of a heat-sensitive element in a dynamic thermal test of a fire sprinkler head according to claim 6, characterized in that, The housing, specimen mounting base, plunger, and compression spring are all made of stainless steel.

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