Point-type smoke fire detector response threshold value test tool

Abstract

The utility model relates to a kind of point type smoke fire detector response threshold test tool, the tool includes box support, the left and right ends of box support have the opening consistent with its inner cavity contour, opening and inner cavity form horizontal test flue together;The tool further includes hollow rotating shaft vertically arranged on test flue, driving component for driving hollow rotating shaft to rotate, mounting seat in longitudinal movable cooperation with hollow rotating shaft, and adjusting component for adjusting the up-down position of mounting seat;The upper end of hollow rotating shaft penetrates test flue and is rotatably connected with box support;Hollow rotating shaft is provided with multiple and is side by side along the width direction of test flue;The utility model whole structure is simple, and it is convenient to adjust, and through adjusting component and rotatable hollow rotating shaft, multi-attitude test in horizontal all directions and longitudinal direction can be realized.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a test fixture for the response threshold of a point-type smoke detector. Background Technology

[0002] Photoelectric smoke detectors utilize the fundamental property that smoke produced during a fire alters the propagation characteristics of light. They are made by applying the principle that smoke particles scatter, absorb, or block light. Currently, typical photoelectric smoke detectors are of the scattering type. This type of detector contains a light-emitting element and a light-receiving element within its detection chamber. Under normal circumstances, the light-receiving element does not receive the light emitted by the light-emitting element and therefore does not generate an electro-optical current. When a fire occurs and smoke enters the detector's detection chamber, the smoke particles cause the light emitted by the light-emitting element to be scattered. This scattered light is received by the light-receiving element, generating a photocurrent. This converts the smoke signal into an electrical signal, and the detector then issues an alarm signal.

[0003] In actual production, to ensure the accuracy of detection, the performance parameters of the smoke detectors should be inspected and tested one by one before leaving the factory, especially the test of the response threshold. During actual testing, a bracket is needed to fix the detector in the smoke chamber. However, this method cannot measure from all horizontal angles and longitudinal directions, leading to incomplete representativeness of the detected parameters. Therefore, it is necessary to design a new testing fixture to meet production needs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a test fixture for the response threshold of a point-type smoke detector, which can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows: A test fixture for the response threshold of a point-type smoke detector is provided, including a housing support. The left and right ends of the housing support have openings that are consistent with the contour of its inner cavity. The openings and the inner cavity together form a horizontal test smoke duct. It also includes a hollow rotating shaft vertically mounted on the test flue, a drive assembly for driving the hollow rotating shaft to rotate, a mounting base that is longitudinally movable with the hollow rotating shaft, and an adjustment assembly for adjusting the vertical position of the mounting base; the upper end of the hollow rotating shaft passes through the test flue and is rotatably connected to the housing support; multiple hollow rotating shafts are provided and arranged side by side along the width direction of the test flue.

[0006] The point-type smoke detector response threshold testing fixture of this utility model further includes a positioning component that detachably positions the detector on the lower surface of the mounting base.

[0007] The point-type smoke detector response threshold testing fixture of this utility model includes a mounting base that is disc-shaped and horizontally arranged. The lower surface of the mounting base is provided with a mounting groove for mounting the positioning component. The positioning component includes a screw rod horizontally arranged in the mounting groove and a screw rod sleeve that cooperates with it. The threads of the screw rod sleeve and the screw rod form a unit and there are two of them. The threads of the two units are in opposite directions. The positioning component also includes a retainer located at the lower end of the screw sleeve, and the lower part of the opposite ends of the two retainers is provided with a horizontal extension.

[0008] The point-type smoke detector response threshold testing fixture of this utility model has a slotted groove on both sides of the screw at the lower end of the mounting base, which is in the same direction as the screw. Both ends of the slotted groove penetrate the side wall of the mounting base.

[0009] The point-type smoke detector response threshold testing fixture of this utility model includes a horizontally detachable connection between the mounting bracket and the screw sleeve.

[0010] The point-type smoke detector response threshold testing fixture of this utility model has a horizontal mounting surface at the lower end of the screw sleeve, and a bolt is longitudinally inserted through the bracket and threadedly connected to the mounting surface through the bolt.

[0011] The point-type smoke detector response threshold testing fixture of this utility model includes an adjustment component comprising a movable sleeve coaxially slidably fitted on the lower end of the hollow rotating shaft, and a positioning pin for positioning the movable sleeve on the hollow rotating shaft; a mounting base is disposed at the lower end of the movable sleeve; both the movable sleeve and the hollow rotating shaft are radially perforated with pin holes adapted to the positioning pins, and the pin holes are provided in multiple manner and arranged along the length direction of the hollow rotating shaft.

[0012] The point-type smoke detector response threshold testing fixture of this utility model includes a movable sleeve that is vertically and integrally connected to the upper surface of the mounting base.

[0013] The point-type smoke detector response threshold testing fixture of this utility model has multiple hollow rotating shafts arranged in the width direction of the test smoke duct. The drive assembly includes a drive gear fixed coaxially with the hollow rotating shaft and a drive motor that drives the drive gear to rotate; when assembled, the multiple drive gears are connected in sequence for transmission.

[0014] The point-type smoke detector response threshold testing fixture of this utility model has a transmission gear meshing between two adjacent drive gears on the upper surface of the housing support.

[0015] The beneficial effects of this utility model are as follows: This utility model has a simple overall structure and is easy to adjust. By adjusting the components and the rotatable hollow rotating shaft, it can achieve multi-angle testing in the horizontal and vertical directions, making the test results more reliable. Furthermore, the hollow rotating shaft's internal cavity design makes it easy to directly lead out the connecting wires from the top of the detector without needing to make holes in the housing support. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. 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. Figure 1 This is a side view of the present invention.

[0017] Figure 2 yes Figure 1 AA sectional view.

[0018] Figure 3 yes Figure 2 Enlarged view of a local structure.

[0019] Figure 4 This is a side view of the assembled card holder and screw assembly of this utility model.

[0020] Figure 5 This is another side view of the assembled card holder and screw assembly of this utility model.

[0021] Figure 6 This is a schematic diagram of the assembly of the extension of this utility model with the groove-type snap-fit ​​slot.

[0022] Figure 7 This is a schematic diagram of the assembly of the extension of this utility model with the protruding snap-fit ​​groove.

[0023] Figure 8 This is a horizontal cross-sectional view of the strip-shaped snap-fit ​​groove and the U-shaped snap-fit ​​component after assembly. Detailed Implementation The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. 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.

[0028] The preferred embodiment of this utility model includes a test fixture for the response threshold of a point-type smoke detector, such as... Figure 1-8As shown, the tooling of this solution includes a housing support 10, with openings 101 at both ends of the housing support 10 that conform to the contour of its inner cavity. The openings 101 and the inner cavity together form a horizontal test flue 20. The tooling of this solution also includes a hollow rotating shaft 30 vertically mounted on the test flue 20, a drive assembly 40 for driving the hollow rotating shaft 30 to rotate, a mounting base 50 that is longitudinally movable with the hollow rotating shaft 30, and an adjustment assembly 60 for adjusting the vertical position of the mounting base 50. The upper end of the hollow rotating shaft 30 penetrates the test flue. The test flue 20 is rotatably connected to the housing support; multiple hollow rotating shafts are provided and arranged side by side along the width direction of the test flue; the overall structure of this utility model is simple and easy to adjust. After the detector 400 is installed on the bottom surface of the mounting base, multi-angle testing in the horizontal and vertical directions can be achieved by adjusting the component 60 and the rotatable hollow rotating shaft 30, making the test results more referential; moreover, the internal cavity structure design of the hollow rotating shaft 30 also makes it convenient to directly lead out the connecting wire at the top of the detector without having to make holes in the housing support.

[0029] In this embodiment, the tooling of this solution also includes a positioning component 70 for detachably positioning the detector on the lower surface of the mounting base 50. Specifically, the mounting base 50 is disc-shaped and horizontally arranged. The lower surface of the mounting base 50 is provided with a mounting groove 51 for mounting the positioning component 70. The positioning component 70 includes a screw 71 horizontally arranged in the mounting groove 51 and a screw sleeve 72 that cooperates with it. Both ends of the screw 71 are longitudinally rotatably connected to the mounting base 50, and any end penetrates the side wall of the mounting groove 51 to facilitate the use of tools to rotate the screw 71. The mounting groove 51 is elongated and its longitudinal section is square. The longitudinal section of the screw sleeve 72 is square and it is slidably engaged with the mounting groove. The threads of the screw sleeve 72 and the screw 71 form a unit and there are two of them. The threads of the two units are in opposite directions, so that when the screw 71 rotates on a fixed axis, it can drive the two screw sleeves 72 to move synchronously towards each other or away from each other.

[0030] Of course, to reduce the cumbersome operation of adjusting the screw 71 with tools, a transmission chain can also be engaged and sleeved on the positioning pin 62, so that the lower end of the transmission chain is also engaged and sleeved on the screw 71. When it is necessary to adjust the relative distance between the two screw sleeves, it is only necessary to rotate the positioning pin and drive the screw to rotate through the transmission chain to achieve the driving of the two screw sleeves. In order to ensure the compatibility between the transmission chain and the screw, a suitable gear can be coaxially fixed on the screw 71. The transmission chain can be a transmission belt with inner tooth grooves.

[0031] Furthermore, the positioning assembly 70 also includes a retainer 73 located at the lower end of the screw sleeve 72. The lower part of the opposite ends of the two retainers 73 is provided with a horizontal extension 730. By adjusting the distance between the two screw sleeves 72 to a suitable distance, the extension 730 can be circumferentially screwed into the horizontal locking groove 501 on the mounting surface 500 of the detector. During installation, for the groove-type horizontal locking groove, the longitudinal inlet 502 of the horizontal locking groove 501 is aligned with the extension 730, the screw sleeve is inserted and the position is adjusted, and then the extension 730 is rotated and locked into the horizontal locking groove, thereby preventing the detector from falling. For the protruding horizontal locking groove (a C-shaped protrusion is longitudinally provided on the mounting surface 500), the extension 730 can be directly rotated and locked into the horizontal locking groove.

[0032] In this embodiment, the lower end of the card holder 73 has strip-shaped slots 732 on both sides of the screw 71, which are in the same direction as the screw 71. Both ends of the strip-shaped slots 732 penetrate the side wall of the card holder 73, thereby forming an I-shaped slot structure through the two strip-shaped slots 732, which can be used to engage with the horizontally arranged U-shaped snap-fit ​​component 402. In specific installation, the detector is first placed below the screw 71, and then the screw 71 is rotated so that the two screw sleeves 72 move toward each other. After they are in place, the two arms of the U-shaped snap-fit ​​component 402 are respectively inserted into the two strip-shaped slots 732.

[0033] In this embodiment, the card holder 73 and the screw sleeve 72 are horizontally detachably connected. Specifically, the lower end of the screw sleeve 72 has a horizontal mounting surface 500, and the card holder 73 has a bolt 80 running through it longitudinally and is threadedly connected to the mounting surface 500 through the bolt 80. This connection method design allows for easy replacement of other types of card holders 73. It can be used not only to install detectors with clips / slots set in the circumferential direction, but also to install detectors with clips / slots set in the radial direction, making it more adaptable.

[0034] In this embodiment, the adjustment component 60 includes a movable sleeve 61 coaxially slidably sleeved on the lower end of the hollow rotating shaft 30, and a positioning pin 62 that positions the movable sleeve 61 on the hollow rotating shaft 30. The mounting base 50 is located at the lower end of the movable sleeve 61. Both the movable sleeve 61 and the hollow rotating shaft 30 are radially perforated with pin holes 90 that are adapted to the positioning pin 62. There are multiple pin holes 90 arranged along the length direction of the hollow rotating shaft 30. When it is necessary to adjust the vertical position, the height position of the detector can be adjusted by the cooperation of the positioning pin 62, the pin holes 90, and the vertically moving movable sleeve 61.

[0035] In this embodiment, the movable sleeve 61 is vertically and integrally connected to the upper surface of the mounting base 50.

[0036] In this embodiment, the hollow rotating shaft 30 is provided with multiple shafts and the smoke test flue 20 is arranged in the width direction; wherein, the drive assembly 40 includes a drive gear 41 coaxially fixed with the hollow rotating shaft 30 and a drive motor 42 for driving the drive gear 41 to rotate; when assembled in place, the multiple drive gears 41 are connected in sequence through conventional gear transmission, and the transmission gear is horizontally rotatably connected to the upper surface of the housing support.

[0037] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A point-type smoke fire detector response threshold test tool, characterized by, Includes a housing support, the left and right ends of which have openings consistent with the contour of their inner cavity, the openings and the inner cavity together forming a horizontal test flue; It also includes a hollow rotating shaft vertically mounted on the test flue, a drive assembly for driving the hollow rotating shaft to rotate, a mounting base that is longitudinally movable with the hollow rotating shaft, and an adjustment assembly for adjusting the vertical position of the mounting base; the upper end of the hollow rotating shaft passes through the test flue and is rotatably connected to the housing support; multiple hollow rotating shafts are provided and arranged side by side along the width direction of the test flue.

2. The point-type smoke fire detector response threshold test tool of claim 1, wherein, It also includes a positioning component that positions the detector in a detachable manner on the lower surface of the mounting base.

3. The point-type smoke fire detector response threshold test tool of claim 2, wherein, The mounting base is disc-shaped and horizontally arranged. The lower surface of the mounting base is provided with a mounting groove for mounting the positioning component. The positioning component includes a screw rod horizontally arranged in the mounting groove and a screw rod sleeve that cooperates with it. The threads of the screw rod sleeve and the screw rod form a unit and there are two of them. The threads of the two units are in opposite directions. The positioning component also includes a retainer located at the lower end of the screw sleeve, and the lower part of the opposite ends of the two retainers is provided with a horizontal extension.

4. The point-type smoke fire detector response threshold test tool of claim 3, wherein, The lower end of the card holder has strip-shaped slots on both sides of the screw, which are in the same direction as the screw. Both ends of the strip-shaped slots penetrate the side wall of the card holder.

5. A point-type smoke fire detector response threshold test kit according to claim 3 or 4, wherein, The card holder and the screw sleeve are horizontally and detachably connected.

6. The point-type smoke fire detector response threshold test tool of claim 5, wherein, The lower end of the screw sleeve has a horizontal mounting surface, and a bolt runs longitudinally through the card holder and is threadedly connected to the mounting surface through the bolt.

7. The point-type smoke fire detector response threshold test tool of claim 3, wherein, The adjustment assembly includes a movable sleeve coaxially slidably sleeved on the lower end of the hollow rotating shaft, and a positioning pin for positioning the movable sleeve on the hollow rotating shaft; the mounting base is located at the lower end of the movable sleeve, and both the movable sleeve and the hollow rotating shaft are radially perforated with pin holes adapted to the positioning pins, and the pin holes are provided in multiples and arranged along the length direction of the hollow rotating shaft.

8. The point-type smoke fire detector response threshold test tool of claim 7, wherein, The movable sleeve is vertically and integrally connected to the upper surface of the mounting base.

9. The point-type smoke fire detector response threshold test tool of claim 1, wherein, The hollow rotating shaft is provided in multiple ways and is arranged in the width direction of the test flue; The drive assembly includes a drive gear fixed coaxially with the hollow rotating shaft and a drive motor that drives the drive gear to rotate; when assembled, the multiple drive gears are connected in sequence for transmission.

10. The point-type smoke fire detector response threshold test tool of claim 9, wherein, On the upper surface of the housing support, a transmission gear meshes between two adjacent drive gears.

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