Mounting structure for testing fire sensitivity of fire detector

Abstract

The utility model relates to a mounting structure for testing fire sensitivity of a fire detector. The mounting structure comprises a bottom plate and a mounting seat, a connecting column is arranged in the middle of the bottom plate; one end of the mounting seat is rotationally connected with the lower end of the connecting column through a rotating assembly; the installation structure is ingenious in design and comprises the bottom plate and the installation base, the bottom plate is installed on a ceiling, the fire detector is installed on the installation base, the installation base is rotationally connected with the base through the rotating assembly, a user can rotate the installation base according to the most disadvantageous specific direction of smoke sensing, and then the testing angle of the fire detector is adjusted. And the subsequently measured fire sensitivity data can be more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of fire sensitivity testing devices, in particular to an installation structure for fire sensitivity testing of a fire detector. Background Art

[0002] According to the fire sensitivity test requirements of 6.22 in GB4715-2024 standard, the test steps are as follows:

[0003] 6.22.1.1 Install the four specimens with the highest response thresholds on the ceiling of the combustion laboratory in the most unfavorable smoke sensing orientation (with the relative airflow direction from the center of the combustion laboratory toward the specimens) in accordance with Appendix E of GB 4715-2024 and 6.1.3 of GB 4715-2024. Place the specimens in a normal monitoring state in accordance with 6.1.2 of GB 4715-2024 and allow them to operate stably for 15 minutes.

[0004] 6.22.1.2 Before the test, the laboratory should be ventilated until the thermocouple, optical smoke density meter and ion smoke concentration meter indicate a temperature of (23±5)℃, a smoke concentration m value of less than 0.02dB / m and a smoke concentration y value of less than 0.05 respectively.

[0005] 6.22.1.3 After ignition, test personnel should immediately leave the laboratory and take care to prevent air flow from affecting the test fire. All doors, windows, or other openings should be closed. Fire parameters such as m and y should be measured at all times during the test.

[0006] The above content is the test requirements for fire sensitivity of point-type smoke detectors in GB 4715-2024.

[0007] In the prior art, fire detectors are usually fixed to the ceiling through a mounting base. For example, Patent No. CN202321628508.7 discloses a point-type photoelectric smoke fire detector with a quick installation structure; it includes a mounting plate, the bottom end of the mounting plate is movably connected to a base, the inside of the base is movably connected to a disassembly structure, and the bottom end of the base is fixedly connected to the fire detector body; although this device can realize the rapid disassembly and assembly of the fire detector body on the mounting plate, this mounting structure does not have a rotational positioning function. After the fire detector is installed on the ceiling, the rotation angle of the fire detector cannot be adjusted according to the most unfavorable direction of smoke sensing, which will cause the data collected during the fire detector test to be inaccurate. Utility Model Content

[0008] The technical problem to be solved by the present invention is to provide a mounting structure for fire sensitivity testing of a fire detector in view of the above-mentioned defects of the prior art.

[0009] The technical solution adopted by the utility model to solve the technical problem is: a mounting structure for testing the fire sensitivity of a fire detector, which includes a base plate and a mounting base, wherein a connecting column is provided in the middle of the base plate; one end of the mounting base is rotatably connected to the lower end of the connecting column via a rotating assembly; a mounting groove for placing the fire detector is provided in the middle of the lower end of the mounting base; and a fastening assembly is provided on the mounting base for clamping and fixing the fire detector in the mounting groove;

[0010] The mounting structure of the present invention, wherein the rotating assembly comprises an inner ring fixedly sleeved on the connecting column, and an outer ring fixedly connected to the mounting seat; the outer ring is sleeved outside the inner ring and can rotate relative to the inner ring; a movable connection module is further provided between the outer ring and the inner ring to limit the separation of the two rings;

[0011] The mounting structure of the present invention comprises a sliding groove provided on the two opposite surfaces of the inner ring and the outer ring; the movable connection module comprises a plurality of rolling bodies movably arranged between the inner ring and the outer ring and rollingly connected to the two sliding grooves; the two ends of the rolling bodies are respectively inserted into the two sliding grooves;

[0012] The mounting structure of the present invention has an area of the bottom plate that is larger than that of the mounting seat; the mounting seat is annular; a surface of the bottom plate facing the mounting seat is provided with a plurality of angle scale lines on the outer circumference of the mounting seat; and a pointer pointing to any angle scale line is provided on the outer surface of the mounting seat.

[0013] The mounting structure described in the present invention has a gap between the mounting seat and the base plate; the pointer includes a vertical rod extending from the outer edge of the mounting seat toward the gap and a folding indicating needle head rotatably connected to the lower end of the vertical rod.

[0014] In the installation structure of the present invention, a receiving groove for receiving the folding indicating needle is provided on the vertical rod.

[0015] The installation structure described in the present utility model, wherein, the folding indicator needle is provided with a first magnetic block; the area of the bottom plate located at the angle scale line is provided with a second magnetic block that cooperates with the first magnetic block for magnetic attraction; in the initial state of the pointer, the folding indicator needle is folded and fitted with the vertical rod; after the pointer is rotated to the most unfavorable position for smoke sensing, the folding indicator needle is flipped outward to be perpendicular to the vertical rod, and the first magnetic block and the second magnetic block cooperate with each other for magnetic attraction to limit the pointer.

[0016] The installation structure described in the present invention, wherein the fastening assembly includes at least two threaded rods that cooperate and abut against the fire detector; the spacing between the two threaded rods is adjustable; the mounting seat is located on one side of the rotating assembly and is circumferentially provided with a plurality of threaded channels that cooperate with any of the threaded rods and are threadedly connected; the threaded channels are connected to the mounting groove.

[0017] In the installation structure of the present invention, all the threaded channels are located on the same horizontal plane.

[0018] In the installation structure described in the present invention, the base plate and the connecting column are integrated.

[0019] The beneficial effect of the present utility model is that the mounting structure is cleverly designed, comprising a base plate and a mounting base, the base plate being mounted on the ceiling, the fire detector being mounted on the mounting base, and the mounting base being rotatably connected to the base via a rotating assembly. The user can rotate the mounting base according to the specific orientation that is most unfavorable for smoke sensing, thereby adjusting the test angle of the fire detector, thereby making the subsequently measured fire sensitivity data more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. 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 work:

[0021] Figure 1 This is a structural diagram of an installation structure for a fire detector fire sensitivity test according to a preferred embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 Bottom view of the installation structure;

[0023] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0024] Figure 4 yes Figure 1 Schematic diagram of the structure of the pointer. DETAILED DESCRIPTION

[0025] The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] "Multiple" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0028] Moreover, the terms "up, down, front, back, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or apparatus described in this solution during normal use.

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0030] A preferred embodiment of the present invention is a fire detector fire sensitivity test installation structure, such as Figure 1-3As shown, the device comprises a base plate 11 and a mounting base 12. A connecting post 111 is provided in the middle of the base plate 11. In one embodiment, the base plate 11 is circular in shape. The connecting post 111 is located on the lower surface of the base plate 11. The base plate 11 and the connecting post 111 are integrated into one structure, providing a stable structure. One end of the mounting base 12 is rotatably connected to the lower end of the connecting post 111 via a rotating assembly 13. A mounting groove 121 for the fire detector is provided in the middle of the lower end of the mounting base 12. The mounting base 12 is provided with a fastening assembly that clamps the fire detector into the mounting groove 121. It is worth noting that this mounting structure is not only applicable to fire detectors, but can also be applied to other test samples, such as alarms.

[0031] The installation structure is cleverly designed and includes a base plate and a mounting base. The base plate is installed on the ceiling, and the fire detector is installed on the mounting base. The mounting base is rotatably connected to the base through a rotating assembly. Users can rotate the mounting base according to the specific direction where smoke sensing is most unfavorable, and then adjust the test angle of the fire detector, which can make the subsequently measured fire sensitivity data more accurate.

[0032] In one embodiment, the rotating assembly 13 includes an inner ring 131 fixedly mounted on the connecting post 111, and an outer ring 132 fixedly connected to the mounting base 12. In this embodiment, the inner ring 131 can be fixedly connected to the connecting post 111 using a locking agent or glue in the prior art through chemical curing. Similarly, the outer ring 132 can be fixed to the mounting base 12 in the same manner. Fire detectors in the prior art are generally lightweight, so this fixed connection method can meet the requirements. The outer ring 132 is mounted on the outside of the inner ring 131 and can rotate relative to the inner ring 131. A movable connection module is also provided between the outer ring 132 and the inner ring 131 to prevent the two from separating. When the mounting base rotates, the outer ring drives the outer ring to rotate relative to the inner ring, which is convenient to rotate, simple in structure, and stable in connection. Furthermore, grooves 133 are provided on the opposing surfaces of the inner ring 131 and the outer ring 132. The movable connection module includes a plurality of rolling elements 134 movably disposed between the inner ring 131 and the outer ring 132 and in rolling connection with the two grooves 133, providing reliable support and reducing noise and vibration. The ends of the rolling elements 134 are respectively inserted into the two grooves 133. In this embodiment, the rolling elements 134 are spherical in structure; alternatively, the rolling elements 134 can be cylindrical in structure. This rotating structure not only enables relative motion between the inner and outer rings, reducing friction and wear, but also improves the stability of the mounting base on the base. The insertion of the ends of the rolling elements into the two grooves also saves space and prevents the inner and outer rings from separating, ensuring a stable connection. Alternatively, the rotating assembly 13 can also be a conventional damping rotation structure or a rotary motor that drives the mounting base. The mounting base can be rotated 360° manually or electrically, facilitating adjustment of the fire detector's test angle based on the most unfavorable smoke sensing position.

[0033] Furthermore, the area of the base plate 11 is larger than the area of the mounting base 12; the mounting base 12 has a circular ring structure; the side surface of the base plate 11 facing the mounting base 12 is located on the outer circumference of the mounting base 12 and is provided with multiple angle scale lines (not shown in the figure); the outer surface of the mounting base 12 is provided with a pointer 14 pointing to any angle scale line (not shown in the figure), which facilitates the user to determine the rotation angle of the fire detector according to the specific direction that is most unfavorable for smoke sensing.

[0034] Furthermore, a gap is left between the mounting base 12 and the base plate 11; Figure 4 As shown, pointer 14 comprises a vertical rod 141 extending from the outer edge of mounting base 12 toward the gap, and a foldable indicator needle 142 pivotally connected to the lower end of vertical rod 141. After the detector is installed, in its initial state, foldable indicator needle 142 remains folded and in contact with vertical rod 141. The user rotates the mounting base to the most unfavorable position for smoke detection, moving the pointer into position. At this point, the user can manually or by other means flip foldable indicator needle 142 outward.

[0035] Furthermore, a receiving groove 143 for receiving the folding indicator needle 142 is provided on the vertical rod 141. This not only makes the pointer smaller in the folded state, but also enables the pointer and the mounting base to rotate smoothly on the base plate.

[0036] Furthermore, a first magnetic block (not shown in the figure) is provided on the folding indicator needle 142; a second magnetic block (not shown in the figure) that cooperates with the first magnetic block (not shown in the figure) is provided in the area of the base plate 11 located at the angle scale line (not shown in the figure); in the initial state of the pointer 14, the folding indicator needle 142 is folded and fitted with the vertical rod 141; the first magnetic block of the folding indicator needle 142 and the second magnetic block on the base plate do not affect each other, so that the pointer and the mounting seat can rotate smoothly on the base plate; when the pointer 14 rotates to the most unfavorable position for smoke sensing, the user uses a finger or other component to drive the folding indicator needle 142 to flip outward to be perpendicular to the vertical rod 141, so that the first magnetic block (not shown in the figure) and the second magnetic block (not shown in the figure) cooperate with magnetic attraction to limit the pointer, and then rotate and position the mounting seat, which is convenient for subsequent smoke sensitivity test experiments.

[0037] In this embodiment, the first magnetic block is located on the end face of the free end of the folding indicator needle; the second magnetic block is an annular setting with the same path as the needle movement; optionally, the second magnetic block can also be a plurality of small block-shaped magnets; the plurality of small block-shaped magnetic blocks are arranged circumferentially in sequence.

[0038] like Figure 1 As shown, further, the fastening assembly includes at least two threaded rods 15 that cooperate with the fire detector and abut against each other; the distance between the two threaded rods is adjustable; Figure 1and Figure 3 As shown, the mounting seat 12 is located on one side of the rotating assembly 13 and is circumferentially provided with a plurality of threaded channels 122 that are threadedly connected to any of the threaded rods 15; the threaded channels 122 are connected to the mounting groove 121. Based on the principle of spiral transmission, rotating the threaded rod causes the external thread on the threaded rod to interact with the internal thread on the threaded channel, thereby generating a force that pushes the threaded rod to move linearly along the length of the threaded channel. Due to the wedge-shaped profile of the external and internal threads, this movement mode can effectively convert rotational motion into linear motion, and can also convert torque into thrust. This transmission structure is simple, reliable, and has high transmission efficiency. When the two threaded rods are away from the mounting groove 121, the fire detector is placed in the mounting groove, and then the two threaded rods are driven to rotate inward at the same time until the fire detector is locked and fixed on the mounting seat. The operation is simple and the installation is convenient. Optionally, the fastening assembly can also adopt the clamping mechanism used in the prior art for clamping and fixing the test sample.

[0039] Optionally, all the threaded channels 122 are located on the same horizontal plane, so that the fire detector can be installed in the installation groove more stably and the force on the fire detector is more evenly distributed.

[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A fire detector fire sensitivity test installation structure, characterized in that: It includes a base plate and a mounting base, a connecting column is provided in the middle of the base plate; one end of the mounting base is rotatably connected to the lower end of the connecting column through a rotating component; a mounting groove for placing the fire detector is provided in the middle of the lower end of the mounting base; and a fastening component is provided on the mounting base to clamp and fix the fire detector in the mounting groove.

2. The mounting structure according to claim 1, wherein: The rotating assembly includes an inner ring fixedly mounted on the connecting column and an outer ring fixedly connected to the mounting seat; the outer ring is mounted outside the inner ring and can rotate relative to the inner ring; a movable connection module is also provided between the outer ring and the inner ring to limit the separation of the two.

3. The mounting structure according to claim 2, wherein: The inner ring and the outer ring are provided with corresponding sliding grooves on both sides of the surface. The movable connection module includes a plurality of rolling bodies that are movably arranged between the inner ring and the outer ring and are rollingly connected with the two sliding grooves. The two ends of the rolling body are respectively inserted into the two sliding grooves.

4. The mounting structure according to claim 1, wherein: The area of the base plate is larger than that of the mounting seat; the mounting seat is annular in structure; a surface of the base plate facing the mounting seat is provided with a plurality of angle scale lines on the outer circumference of the mounting seat; and a pointer pointing to any angle scale line is provided on the outer surface of the mounting seat.

5. The mounting structure according to claim 4, wherein: A gap is left between the mounting seat and the base plate; the pointer includes a vertical rod extending from the outer edge of the mounting seat toward the gap and a folding indicating needle rotatably connected to the lower end of the vertical rod.

6. The mounting structure according to claim 5, characterized in that: The vertical rod is provided with an accommodating groove for accommodating the folding indicating needle.

7. The mounting structure according to claim 6, wherein: A first magnetic block is provided on the folding indicator needle; a second magnetic block is provided in the area of the bottom plate located at the angle scale line, which cooperates with the first magnetic block for magnetic attraction; in the initial state of the pointer, the folding indicator needle is folded and fitted with the vertical rod; after the pointer is rotated to the most unfavorable position for smoke sensing, the folding indicator needle is flipped outward to be perpendicular to the vertical rod, and the first magnetic block cooperates with the second magnetic block for magnetic attraction to limit the pointer.

8. The mounting structure according to any one of claims 1 to 7, characterized in that: The fastening assembly includes at least two threaded rods that cooperate with and abut against the fire detector; the spacing between the two threaded rods is adjustable; the mounting seat is located on one side of the rotating assembly and is circumferentially provided with multiple threaded channels that cooperate with any of the threaded rods for threaded connection; the threaded channels are connected to the mounting groove.

9. The mounting structure according to claim 8, characterized in that: All of the threaded channels are located in the same horizontal plane.

10. The mounting structure according to claim 1, wherein: The bottom plate and the connecting column are integrated.

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