Testing device for point-type smoke-sensing fire detector

Abstract

The invention discloses a testing device for a point type smoke fire detector, and belongs to the technical field of testing of smoke fire detectors, the testing device comprises a smoke box, a placement piece and a switching device, the smoke box is of a closed-loop cavity structure shaped like a Chinese character'hui ', and one side of the smoke box is connected with a smoke inlet pipe; a smoke outlet pipe is arranged on the lower side of the smoke box; the placing piece comprises a supporting plate, a plurality of placing grooves are formed in the supporting plate, and the supporting plate is in sliding connection with the smoke box; the two supporting plates are arranged, detection is carried out in the smoke box through one supporting plate, the smoke sensing fire detector body is placed on the outer side of the other supporting plate, the utilization efficiency of time is improved, after detection is completed, switching is carried out through the switching device, the detection device does not need to be shut down, and the detection efficiency is improved. Therefore, the smoke-sensing fire detector body on the other supporting plate can be rapidly detected, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of smoke fire detector testing, in particular to a testing device for a point-type smoke fire detector. Background Art

[0002] Point-type smoke detectors mainly detect smoke and are suitable for places with smoldering stages in the early stages of fire. Smoke fire detectors are fire detectors that respond to solid particles produced by combustion or heat media. According to the properties or strengths of certain physical quantities that smoke particles can directly or indirectly change, smoke detectors can be divided into ion type, photoelectric type, laser type, capacitive semiconductor type, etc.

[0003] During the development and research of various point-type smoke detectors and the optimization of detector detection algorithms, it is necessary to test the recognition degree of point-type smoke detectors for fire smoke aerosols and environmental interference aerosols, improve the detector detection algorithm, distinguish between real fires and false fires, and reduce the false alarm rate. The conventional practice is to set the detectors near each interference source and rely on air flow to test the anti-interference performance of the detectors.

[0004] In order to improve the test efficiency, multiple point-type smoke detectors are placed on a pallet at one time and then pushed into the box of the test device for testing. After the test is completed, the pallet is pulled out and the point-type smoke detectors are manually taken out one by one. After taking them out, new point-type smoke detectors to be tested are put back in. In the process of taking out and placing the point-type smoke detectors, the detection device is in an inactive state. During the long-term operation of the detection device, the cumulative time taken up for taking out and placing is long, which is not conducive to improving the test efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the problem mentioned in the above background technology that during the long-term operation of the detection device, the cumulative time taken for taking out and placing is long, which is not conducive to improving the test efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A testing device for a point-type smoke fire detector comprises a smoke box, a placement piece and a switching device, wherein the smoke box is in a "U"-shaped closed-loop cavity structure, a smoke inlet pipe is connected to one side of the smoke box; a smoke outlet pipe is arranged on the lower side of the smoke box; the placement piece comprises a support plate, a plurality of placement slots are arranged on the support plate, and the support plate is slidably connected to the smoke box; the switching device is arranged between the two support plates, the switching device comprises a driving device and a switching tooth piece, switching tooth plates meshing with the driving support plates are respectively arranged on both sides of the switching tooth piece, and the driving device is fixedly connected to one of the switching tooth plates.

[0007] Preferably, the switching device also includes a support frame supporting the driving device, the two switching tooth plates are slidably connected to the support frame, the switching tooth member is connected to the support frame, and the switching device also includes a test connector, the test connector includes a lifting rod inserted into the cigarette box, the bottom end of the lifting rod is connected to a connecting plate, and a connecting terminal is fixed on the connecting plate.

[0008] Preferably, the connecting plate is fixed to the protective plate, and the protective plate is located on the upper side of the connecting plate.

[0009] Preferably, a transmission component is provided between the lifting rod and the support plate, and the transmission component includes a rod body fixed at the top end of the lifting rod, the rod body is connected to a sleeve, a spring is sleeved on the rod body, two ends of the spring are respectively connected to the rod body and the sleeve, a transmission rack is fixedly connected to one side of the sleeve, a transmission gear 1 is rotatably connected to the support frame, a transmission tooth plate is slidably connected to the cigarette box, the transmission tooth plate is fixed to the outer end of the support plate, a transmission gear 2 is rotatably connected to the support frame, and the transmission gear 1 and the transmission gear 2 are connected through a pulley assembly 1.

[0010] Preferably, a shielding cover covering the support plate is slidably connected to the cigarette box, and the shielding cover slides out in the opposite direction to the support plate.

[0011] Preferably, a linkage component is provided between the sleeve and the shielding cover, the linkage component includes a linkage rack fixed on the other side of the sleeve, a linkage gear 1 is rotatably connected to the support frame, a linkage tooth plate is slidably connected to the cigarette box, the linkage tooth plate is fixed to the outer end of the shielding cover, a linkage gear 2 is rotatably connected to the support frame, the linkage gear 1 and the linkage gear 2 are transmission connected via a pulley assembly 2, and the linkage gear 1 is located at the lower side of the transmission gear 1.

[0012] Preferably, a first magnet is fixed on the shielding cover, and a second magnet attracted to the first magnet is fixed on the cigarette box.

[0013] Preferably, an adjustment device is provided upstream of the right side support plate, and the adjustment device includes an adjustment plate, the lower end of the adjustment plate is connected to a drive shaft, one end of the drive shaft extends through the smoke box to the outside and is connected to an adjustment handle, a bolt is threadedly connected to the adjustment handle, and a plurality of sockets are opened on the smoke box.

[0014] Preferably, two honeycomb flow guides corresponding to the support plates are arranged in the smoke box, and the two honeycomb flow guides are respectively located upstream of the support plates.

[0015] Preferably, a fan is provided in the cavity at the lower side of the smoke box, the fan is located upstream of the smoke outlet pipe, a baffle is rotatably connected in the smoke box, a rotating shaft of the baffle extends out of the smoke box and is connected to a motor, and a frame plate matching the baffle is provided in the smoke box.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By setting two pallets, one pallet is used for testing inside the smoke box, and the other pallet is used to place the smoke detector body outside, so that the time utilization efficiency is improved. After the test is completed, the switch is performed through the switching device, so that the detection device does not need to be stopped, and the smoke detector body on the other pallet can be quickly tested, thereby improving the detection efficiency; through the transmission component, one pallet is moved out while the other pallet enters the smoke box at the same time, further improving the detection efficiency; By setting a shielding cover, the support plate is covered before being pulled out, so as to prevent the inside of the smoke box from being connected to the outside during the process of pulling out the support plate, thereby preventing smoke from escaping and not affecting the test of the type smoke fire detector on another support plate; By placing two honeycomb guides upstream of the two support plates, the two honeycomb guides make the smoke uniform, and the honeycomb guide on the right makes the smoke passing through the left support plate uniform again, making adequate preparations for the test of the smoke detector; When the adjustment plates are adjusted from top to bottom, the smoke passage on the upper side of the pallet gradually increases, so that the smoke density passing through the lower side of the right pallet gradually returns to the smoke density passing through the left pallet, until the adjustment plate is rotated to the horizontal device, the smoke density passing through the two pallets is the same; By cooperating with the test connector, the support plate and the elastic sheet, the detection position limit and the transmission connection of the smoke signal can be provided for multiple smoke fire detector bodies at the same time, which facilitates the transmission connection while increasing the detection volume of the smoke fire detector body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the back side of the present invention.

[0020] Figure 3 It is a schematic diagram of the positions of two honeycomb guide members of the present invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged schematic diagram at point A in the middle.

[0022] Figure 5 It is a schematic diagram of the transmission component on the left side of the present invention.

[0023] Figure 6 It is a schematic diagram of the linkage components on the left side of the present invention.

[0024] Figure 7 It is a schematic diagram of the transmission component on the right side of the present invention.

[0025] Figure 8 It is a schematic diagram of the linkage components on the right side of the present invention.

[0026] Fig. 9 It is a schematic diagram of the regulating device of the present invention.

[0027] Fig.10 It is a schematic diagram of the baffle and frame plate of the present invention.

[0028] Fig.11 It is a schematic diagram of the test connector of the present invention.

[0029] Explanation of the figure numbers: 1. Smoke box; 11. Smoke inlet pipe; 12. Smoke outlet pipe; 13. Baffle; 14. Motor; 15. Frame; 2. Placement parts; 21. Support plate; 22. Slide rail; 23. Elastic sheet; 3. Switching device; 31. Driving device; 32. Switching gear; 321. Switching gear; 322. Step pulley assembly; 33. Switching gear plate; 34. Support frame; 35. Test connector; 351. Lifting rod; 352. Connecting plate; 353. Connecting terminal; 354. Protective plate; 36. Transmission parts; 361. Rod body; 362. Sleeve; 363, spring; 364, transmission rack; 365, transmission gear one; 366, transmission tooth plate; 367, transmission gear two; 368, pulley assembly one; 37, linkage component; 371, linkage rack; 372, linkage gear one; 373, linkage tooth plate; 374, linkage gear two; 375, pulley assembly two; 4, fan; 5, honeycomb guide piece; 6, shielding cover; 7, magnet one; 8, magnet two; 9, adjusting device; 91, adjusting plate; 92, driving shaft; 93, adjusting handle; 94, bolt; 95, socket. DETAILED DESCRIPTION

[0030] The present invention is described in further detail below with reference to the accompanying drawings.

[0031] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0033] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0034] See also Figure 1 - Fig.11 A test device for a point-type smoke fire detector comprises a smoke box 1, a placement member 2 and a switching device 3. The smoke box 1 is a "U"-shaped closed-loop cavity structure. A smoke inlet pipe 11 is connected to one side of the smoke box 1; a smoke outlet pipe 12 is arranged at the lower side of the smoke box 1, and a fan 4 is arranged in the cavity at the lower side of the smoke box 1. The fan 4 is located upstream of the smoke outlet pipe 12. A baffle 13 is rotatably connected in the smoke box 1, and a rotating shaft of the baffle 13 extends out of the smoke box 1 and is connected to a motor 14. A frame plate 15 cooperating with the baffle 13 is arranged in the smoke box 1. During detection, smoke needs to be kept in the smoke box 1, so the baffle 13 blocks the outlet of the corresponding smoke outlet pipe 12. When smoke exhaust is required, the baffle 13 is rotated by the motor 14, and the baffle 13 cooperates with the frame plate 15 to block the rotation of the smoke fan 4, blowing the smoke into the smoke outlet pipe 12, thereby completing the smoke exhaust.

[0035] The placement member 2 includes a support plate 21, on which a plurality of placement grooves are provided, and the placement grooves are used to place point-type smoke fire detectors. The support plate 21 is slidably connected to the smoke box 1, and a slide rail 22 is provided in the smoke box 1. The support plate 21 is slidably connected to the slide rail 22. Two support plates 21 are located on the upper side of the cavity structure of the smoke box 1, and are arranged one in front of the other. Two honeycomb flow guides 5 corresponding to the support plates 21 are arranged in the smoke box 1, and the two honeycomb flow guides 5 are respectively located upstream of the support plates 21; the two honeycomb flow guides 5 make the smoke uniform, and the honeycomb flow guide 5 on the right makes the smoke passing through the left support plate 21 uniform again, making sufficient preparations for the measurement of the smoke fire detector. An elastic sheet 23 is fixed on the support plate 21, and two elastic sheets 23 are symmetrically provided on one placement groove. The two elastic sheets 23 are used to abut the point-type smoke fire detector, so that the point-type smoke fire detector is stable, and the elastic sheet 23 has calibration, so that the power-on end on the smoke fire detector corresponds to the elastic sheet 23, so that the connection terminal 353 can be accurately contacted.

[0036] The switching device 3 is arranged between the two support plates 21. The switching device 3 includes a driving device 31 and a switching gear 32. The driving device 31 is a cylinder. Switching gear plates 33 meshing with the driving support plates 21 are respectively arranged on both sides of the switching gear 32. The driving device 31 is fixedly connected to one of the switching gear plates 33. The switching device 3 also includes a support frame 34 supporting the driving device 31. Both the two switching gear plates 33 are slidably connected to the support frame 34. The switching gear 32 is connected to the support frame 34. In order to increase the stability of the switching gear plate 33, the switching gear 32 includes two switching gears 321. The switching gear 321 is rotatably connected to the support frame 34. The two switching gears 321 are respectively meshed with one switching gear plate 33. The two switching gears 321 are connected through a synchronous pulley assembly 322.

[0037] The switching device 3 also includes a test connector 35, which includes a lifting rod 351 inserted into the smoke box 1. The bottom end of the lifting rod 351 is connected to a connecting plate 352, and a connecting terminal 353 is fixed on the connecting plate 352. The connecting terminal 353 contacts the energized end of the smoke detector. The lifting rod 351 is a hollow structure, and a cable passes through the lifting rod 351 to connect with the connecting terminal 353. An industrial computer and an electrical distribution box are arranged on one side of the smoke box 1. The industrial computer can be a computer. A control panel is fixed on the surface of the electrical distribution box. The control panel is provided with indicator lights and control buttons. The panel indicator lights and control buttons are electrically connected to the industrial computer. The other end of the cable is connected to the industrial computer. The connection and use of the cable and the industrial computer are all prior art and will not be explained again. The industrial computer, the electrical distribution box and the components on the electrical distribution box in this application are all prior art and are not shown in the figure.

[0038] The connecting plate 352 is fixed to a protection plate 354 , which is located on the upper side of the connecting plate 352 . The protection plate 354 is used to protect the connecting plate 352 and the connecting terminal 353 , and prevent them from contacting the top wall inside the cigarette box 1 .

[0039] A transmission component 36 is provided between the lifting rod 351 and the support plate 21. Two transmission components 36 are provided. The two transmission components 36 correspond to the two support plates 21 respectively. The transmission component 36 includes a rod body 361 fixed at the top of the lifting rod 351. A limiting ring is fixed at the top of the rod body 361. A sleeve 362 is connected to the rod body 361. The sleeve 362 is slidably connected to the rod body 361. There is a distance between the sleeve 362 and the lifting rod 351. There is also a distance between the limiting ring and the inner top wall of the sleeve 362. A spring 363 is sleeved on the rod body 361. The two ends of the spring 363 are respectively connected to the rod body 361. The sleeve 362 is connected to the sleeve 362, which is provided with a through slot. A transmission rack 364 is fixedly connected to one side of the sleeve 362. A transmission gear 1 365 is rotatably connected to the support frame 34. A transmission tooth plate 366 is slidably connected to the cigarette box 1. The transmission tooth plate 366 is fixed to the outer end of the support plate 21. A connecting rod extends from the end of the transmission tooth plate 366 and is fixed to the support plate 21. A transmission gear 2 367 is rotatably connected to the support frame 34. The transmission gear 2 367 is meshed with the transmission tooth plate 366. The transmission gear 1 365 and the transmission gear 2 367 are connected through a pulley assembly 1 368. The pulley assembly 1 368 is a transmission structure, which is a prior art. The two pulleys of the pulley assembly 1 368 of the present application have different diameters. The purpose of increasing the speed is achieved through the pulley assembly 1 368 from the transmission gear 1 365 to the transmission gear 2 367.

[0040] The smoke box 1 is slidably connected with a shielding cover 6 covering the support plate 21. The shielding cover 6 slides out in the opposite direction to the support plate 21. The shielding cover 6 covers the support plate 21 before the support plate 21 is pulled to prevent the inside of the smoke box 1 from being connected to the outside during the pulling out of the support plate 21, thereby preventing smoke from escaping and not affecting the test of the type smoke fire detector on the other support plate 21. Before the shielding cover 6 moves, the connecting terminal 353 has moved to the upper side of the shielding cover 6, and the shielding cover 6 will not collide with the connecting terminal 353 during the movement. The part of the shielding cover 6 located in the smoke box 1 is fixed with a limited block to prevent the shielding cover 6 from detaching from the smoke box 1.

[0041] A linkage component 37 is provided between the sleeve 362 and the shielding cover 6, and the linkage component 37 includes a linkage rack 371 fixed on the other side of the sleeve 362, a linkage gear 1 372 is rotatably connected to the support frame 34, and a linkage toothed plate 373 is slidably connected to the cigarette box 1, the transmission toothed plate 366 and the linkage toothed plate 373 are respectively located on both sides of the lifting rod 351, the linkage toothed plate 373 is fixed to the outer end of the shielding cover 6, and a linkage gear 2 374 is rotatably connected to the support frame 34, and the linkage gear 1 372 and the linkage gear 2 374 are connected through a pulley assembly 2 375 for transmission, the linkage gear 1 372 is located at the lower side of the transmission gear 1 365, the pulley assembly 2 375 is the same as the pulley assembly 1 368, and the pulley of the pulley assembly 2 375 is the same size as the pulley of the pulley assembly 1 368, and the purpose of increasing the speed from the linkage gear 1 372 to the linkage gear 2 374 is achieved through the pulley assembly 2 375. A magnet 17 is fixed on the shielding cover 6, and the magnet 17 is located on the limit block of the shielding cover 6. A magnet 28 attracted to the magnet 17 is fixed on the cigarette box 1. After the linkage rack 371 and the linkage gear 1 372 are separated, the magnet 17 is located on the limit block of the shielding cover 6. The magnet 28 is set at both ends of the track on the inner wall of the cigarette box 1. The magnet 28 increases the stability of the shielding cover 6 after it moves out of and enters the cigarette box 1. The magnet 17 and the magnet 28 are adsorbed to keep the shielding cover 6 stable in the cigarette box 1. Magnet 17 and magnet 28 are also set on one side of the support plate 21. The magnet 28 is also fixed on the cigarette box 1, and the magnet 17 is fixed on the support plate 21.

[0042] An adjusting device 9 is provided upstream of the right support plate 21. The adjusting device 9 includes an adjusting plate 91. The upper end of the adjusting plate 91 contacts the top wall of the cigarette box 1. The lower end of the adjusting plate 91 is connected to a driving shaft 92. An extension plate is fixed on the slide rail 22. The driving shaft 92 is rotatably connected to the extension plate. Both ends of the bottom of the adjusting plate 91 have arc-shaped portions, which are in contact with the extension plate for sealing. One end of the driving shaft 92 passes through the cigarette box 1 and extends to the outside to be connected to an adjusting handle 93. A bolt 94 is threadedly connected to the adjusting handle 93. A plug rod is fixed to the end of the bolt 94. A plurality of plug holes 95 are provided on the cigarette box 1. The plurality of plug holes 95 are distributed in an arc shape. Fig. 9 As shown, the adjusting plate 91 blocks the upper space of the support plate 21, so that all the smoke passes through the lower side of the support plate 21, increasing the smoke concentration. The adjusting plate 91 is placed in different positions by inserting the plug rod into different plug holes 95. When the adjusting plates 91 are adjusted one by one from top to bottom, the smoke channel on the upper side of the right support plate 21 gradually increases, so that the smoke concentration passing through the lower side of the right support plate 21 gradually returns to the smoke concentration passing through the left support plate 21, until the adjusting plate 91 is rotated to a horizontal device, the smoke concentration passing through the two support plates 21 is the same.

[0043] When in use, interference sources such as cigarettes, cooking fumes and water mist are introduced into the smoke box 1 through the smoke inlet pipe 11, and a circulating airflow is formed in the "U"-shaped closed-loop cavity of the smoke box 1 by the fan 4. The smoke is made uniform through the honeycomb guide 5, providing a stable test environment for the anti-interference test of the point-type smoke fire detector. Figure 1 and Figure 3 As shown, the left support plate 21 is on the outside and is used to place the point type smoke fire detector, and the right support plate 21 is on the inside of the smoke box 1 for detection. At this time, the point type smoke fire detector is placed in the placement groove of the left support plate 21 and calibrated by the elastic sheet 23.

[0044] After the detection is completed, the driving device 31 moves up with the right switching gear plate 33, and the switching gear plate 33 moves up with the sleeve 362, and the linkage rack 371 and the transmission rack 364 move up with the sleeve 362, and the sleeve 362 moves up through the spring 363 and the rod body 361 to make the lifting rod 351 move up, and the lifting rod 351 moves up with the protection plate 354, the connecting plate 352 and the connecting terminal 353. When the connecting terminal 353 is above the shielding cover 6, the linkage rack 371 and the linkage gear 374 move up. 72 meshes, the linkage gear 1 372 rotates, the linkage gear 1 372 rotates through the pulley assembly 2 375, the linkage gear 2 374 rotates, the linkage gear 2 374 drives the linkage toothed plate 373 to move, the linkage toothed plate 373 allows the shielding cover 6 to enter the cigarette box 1, and the upper and lower sides of the shielding cover 6 move along the slide rail 22. When the linkage rack 371 is separated from the linkage gear 1 372, the end of the shielding cover 6 contacts the inner wall of the cigarette box 1, and the magnet 1 7 is attracted to the magnet 2 8 inside the cigarette box 1 (such as Figure 5 and Figure 6 As shown in the figure, at this time, the shielding cover 6 and the two slide rails 22 cover the right side support plate 21 and the point type smoke detector on the support plate 21, and then cover the inlet and outlet of the support plate 21 to prevent smoke from flowing out. The lifting rod 351 continues to move upward until the protection plate 354 contacts the top wall of the smoke box 1. After the lifting rod 351 stops moving, the sleeve 362 continues to move upward. The sleeve 362 moves upward so that the transmission rack 364 is meshed with the transmission gear 1 365. At this time, the spring 363 is compressed and the transmission gear 1 is engaged. Wheel 1 365 rotates transmission gear 2 367 through pulley assembly 1 368, transmission gear 2 367 moves transmission tooth plate 366, transmission tooth plate 366 moves the support plate 21 out, at this time, magnet 1 7 and magnet 2 8 on the support plate 21 are separated, when the switching tooth plate 33 stops, sleeve 362, transmission rack 364 and linkage rack 371 stop moving, at this time, transmission rack 364 is still engaged with transmission gear 1 365 to maintain the stability of the support plate 21 after being pulled out.

[0045] When the right switching toothed plate 33 moves up to rotate the switching gear 321, the switching gear 321 on the left rotates synchronously through the synchronous pulley assembly 322, and the switching gear 321 on the left makes the left switching toothed plate 33 move down, and the switching toothed plate 33 on the left moves down with the sleeve 362, the transmission rack 364 and the linkage rack 371, and the transmission rack 364 makes the transmission gear 1 365 rotate, and the transmission gear 1 365 makes the transmission gear 2 367 rotate through the pulley assembly 1 368, and the transmission gear 2 367 makes the transmission toothed plate 366 move, and the left side support plate 21 with the point type smoke fire detector placed follows the transmission toothed plate 366 to move, and when the transmission rack 364 is separated from the transmission gear 1 365, the magnet 1 7 on the support plate 21 is attracted by the magnet 2 8, and the left side support plate 21 also completely enters the smoke box 1, the spring 363 is restored, and then the sleeve 362 continues to move downward, so that the lifting rod 351 also moves downward, and in the process of the lifting rod 351 moving downward, the linkage rack 371 is pulled downward, and the sleeve 362 ... The linkage rack 371 meshes with the linkage gear 1 372, and the linkage gear 1 372 rotates the linkage gear 2 374 through the pulley assembly 2 375, and the linkage gear 2 374 moves the linkage toothed plate 373, and the linkage toothed plate 373 moves out with the shielding cover 6, and the magnet 1 7 on the shielding cover 6 is separated from the magnet 2 8 on the cigarette box 1, and the lifting rod 351 continues to move downward, and when the linkage rack 371 is separated from the linkage gear 1 372, the shielding cover 6 is completely moved out, so that the dot-shaped The smoke fire detector is completely exposed in the smoke box 1. After the linkage rack 371 is separated from the linkage gear 1 372, the lifting rod 351 continues to move downward until the connecting terminal 353 contacts the energized end of the point-type smoke fire detector. At this time, the lifting rod 351 does not move, and the sleeve 362 continues to move downward, so that the spring 363 is stretched. The spring 363 applies a downward force to the rod body 361 and the lifting rod 351 to keep the connecting terminal 353 in stable contact with the energized end of the point-type smoke fire detector.

[0046] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A test device for a point-type smoke fire detector, characterized in that: include: A smoke box (1) presents a U-shaped closed-loop cavity structure, one side of the smoke box (1) is connected to a smoke inlet pipe (11); a smoke outlet pipe (12) is provided at the lower side of the smoke box (1); A placement member (2), comprising a support plate (21), the support plate (21) being provided with a plurality of placement slots, the support plate (21) being slidably connected to the cigarette box (1); A switching device (3) is arranged between the two support plates (21), the switching device (3) comprising a driving device (31) and a switching toothed member (32), the switching toothed member (32) having switching toothed plates (33) meshing with the driving support plates (21) respectively disposed on both sides, the driving device (31) being fixedly connected to one of the switching toothed plates (33).

2. A test device for a point-type smoke fire detector according to claim 1, characterized in that: The switching device (3) further comprises a support frame (34) supporting the driving device (31), the two switching tooth plates (33) are both slidably connected to the support frame (34), the switching tooth member (32) is connected to the support frame (34), and the switching device (3) further comprises a test connection member (35), the test connection member (35) comprises a lifting rod (351) inserted into the smoke box (1), the bottom end of the lifting rod (351) is connected to a connecting plate (352), and a connecting terminal (353) is fixed to the connecting plate (352).

3. A test device for a point-type smoke fire detector according to claim 2, characterized in that: The connecting plate (352) is fixed to the protection plate (354), and the protection plate (354) is located on the upper side of the connecting plate (352).

4. A test device for a point-type smoke fire detector according to claim 3, characterized in that: A transmission component (36) is provided between the lifting rod (351) and the support plate (21), the transmission component (36) comprising a rod body (361) fixed to the top end of the lifting rod (351), the rod body (361) being connected to a sleeve (362), the rod body (361) being sleeved with a spring (363), the two ends of the spring (363) being respectively connected to the rod body (361) and the sleeve (362), one side of the sleeve (362) being fixedly connected to a transmission rack (364), a transmission gear 1 (365) being rotatably connected to the support frame (34), a transmission tooth plate (366) being slidably connected to the cigarette box (1), the transmission tooth plate (366) being fixed to the outer end of the support plate (21), a transmission gear 2 (367) being rotatably connected to the support frame (34), and the transmission gear 1 (365) and the transmission gear 2 (367) being transmission-connected via a pulley assembly 1 (368).

5. A test device for a point-type smoke fire detector according to claim 4, characterized in that: A shielding cover (6) covering the support plate (21) is slidably connected to the cigarette box (1), and the shielding cover (6) and the support plate (21) slide out in opposite directions.

6. A test device for a point-type smoke fire detector according to claim 5, characterized in that: A linkage component (37) is provided between the sleeve (362) and the shielding cover (6), the linkage component (37) comprising a linkage rack (371) fixed to the other side of the sleeve (362), a linkage gear 1 (372) is rotatably connected to the support frame (34), a linkage toothed plate (373) is slidably connected to the cigarette box (1), the linkage toothed plate (373) is fixed to the outer end of the shielding cover (6), a linkage gear 2 (374) is rotatably connected to the support frame (34), the linkage gear 1 (372) and the linkage gear 2 (374) are transmission-connected via a pulley assembly 2 (375), and the transmission gear 1 (365) is located at the lower side of the transmission gear 1 (365).

7. A test device for a point-type smoke fire detector according to claim 6, characterized in that: A magnet 1 (7) is fixed on the shielding cover (6), and a magnet 2 (8) attracted to the magnet 1 (7) is fixed on the cigarette box (1).

8. A test device for a point-type smoke fire detector according to claim 1, characterized in that: An adjusting device (9) is provided upstream of the right support plate (21), the adjusting device (9) comprising an adjusting plate (91), the lower end of the adjusting plate (91) being connected to a driving shaft (92), one end of the driving shaft (92) passing through the smoke box (1) and extending to the outside to be connected to an adjusting handle (93), a bolt (94) being threadedly connected to the adjusting handle (93), and a plurality of insertion holes (95) being provided on the smoke box (1).

9. A test device for a point-type smoke fire detector according to claim 1, characterized in that: Two honeycomb flow guide members (5) corresponding to the support plates (21) are arranged in the smoke box (1), and the two honeycomb flow guide members (5) are respectively located upstream of the support plates (21).

10. A test device for a point-type smoke fire detector according to claim 9, characterized in that: A fan (4) is arranged in the cavity at the lower side of the smoke box (1), and the fan (4) is located upstream of the smoke outlet pipe (12). A baffle (13) is rotatably connected in the smoke box (1), and a rotating shaft of the baffle (13) extends out of the smoke box (1) and is connected to a motor (14). A frame plate (15) matching the baffle (13) is arranged in the smoke box (1).

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