Smoke and fire alarm system for railway vehicle and railway vehicle

Abstract

The invention provides a smoke and fire alarm system for a railway vehicle, a plurality of side plates extending in the height direction are mounted on the side wall of the railway vehicle, the plurality of side plates are connected in sequence, and an air return duct is defined by the side plates and the side wall; the alarm system comprises an alarm which is installed on the upper side of an air outlet of an air return duct adjacent to an air return opening of the air conditioning unit in the longitudinal direction and is suitable for triggering the alarm to give out a smoke and fire alarm under the condition that smoke dust is mixed in airflow flowing to the alarm; the filtering part is mounted near the air outlet of the air return duct and is suitable for filtering dust mixed in airflow flowing through the air return duct so as to reduce the amount of dust attached to the surface of the alarm; and the air speed adjusting part is installed in the air return duct and located on the lower side of the filtering part, and the air speed adjusting part is constructed to adjust the flow speed of airflow flowing to one side of the filtering part in the air return duct so as to be matched with the flow speed of the airflow needed for triggering the alarm.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of smoke alarm devices for rail vehicles, and more specifically, to a smoke alarm system for rail vehicles and a rail vehicle. Background Art

[0002] As the speed of rail vehicles continues to increase, the requirements for fire safety inside the carriages are also constantly rising. In the prior art, smoke alarms are usually installed inside the carriages to monitor the concentration of smoke and dust in the air inside the carriages. When the concentration of smoke and dust in the air reaches a predetermined value, the smoke alarm is triggered to emit an alarm signal outward.

[0003] However, existing smoke alarms are usually installed near the return air outlet of the air conditioning unit. Since the installation position is relatively close to the return air outlet of the air conditioning unit, the return air speed in the area near the smoke alarm is relatively high, causing a large amount of vehicle dust to adsorb on the surface of the smoke alarm, thereby reducing the detection sensitivity of the smoke alarm to the soot particles inside the vehicle and unable to give an alarm in time. Summary of the Invention

[0004] In view of this, the present disclosure provides a smoke alarm system for rail vehicles to reduce the amount of dust adhering to the surface of the alarm during the process of air flow passing through the alarm, thereby improving the sensitivity of the alarm.

[0005] According to a first aspect of the present disclosure, there is provided a smoke alarm system for a rail vehicle. A plurality of side plates extending in the height direction are installed on the side wall of the rail vehicle. The plurality of side plates are sequentially connected and enclose a return air duct with the side wall. The alarm system includes: an alarm installed above the air outlet of the return air duct adjacent to the return air outlet of the air conditioning unit in the longitudinal direction, adapted to trigger the alarm to emit a smoke alarm when the air flow flowing to the alarm contains soot; a filtering part installed near the air outlet of the return air duct, adapted to filter the dust contained in the air flow flowing through the return air duct to reduce the amount of dust adhering to the surface of the alarm; and a wind speed adjusting part installed inside the return air duct and located below the filtering part, the wind speed adjusting part being configured to adjust the air flow velocity flowing to the side of the filtering part in the return air duct to be adapted to the air flow velocity required to trigger the alarm.

[0006] According to an embodiment of the present disclosure, the filtering part includes: a support frame installed near the air outlet of the return air duct; and a filter screen detachably installed above the support frame to horizontally hold the filter screen on the air outlet of the return air duct.

[0007] According to an embodiment of the present disclosure, the support frame includes: a plurality of bases respectively installed on the tops of the plurality of side plates; and a plurality of clamping claws, one clamping claw is provided on the top of each base, and each clamping claw clamps one side edge of the filter screen.

[0008] According to an embodiment of the present disclosure, a clamping post parallel to the edge is provided on the lower side of each edge of the filter screen. The clamping claw includes: two clamping arms formed on the top of the base facing each other, each clamping arm is made of an elastic material, and under the extrusion of the clamping post, the two clamping arms incline in a direction away from each other to allow the clamping post to extend in and be clamped between the two clamping arms.

[0009] According to an embodiment of the present disclosure, the base is adhesively connected or screwed to the top of the side plate.

[0010] According to an embodiment of the present disclosure, the air velocity adjusting part includes: a frame configured as a border with a substantially rectangular cross-section, the circumferential side wall of the frame fits with the inner wall of the return air duct, and openings communicating with the return air duct are respectively formed on the upper and lower sides of the frame; a plurality of valve plates installed parallel to each other inside the frame, and two opposite edges of each valve plate are respectively rotatably connected to two opposite sides of the frame facing each other; and a driving assembly respectively connected to the plurality of valve plates, and one end extends out of the frame and out of the side plate, and is adapted to drive the plurality of valve plates to rotate towards the upper or lower side of the frame to adjust the size of the area of the opening blocked by the valve plates.

[0011] According to an embodiment of the present disclosure, each valve plate is connected to the frame through a rotating shaft; the driving assembly includes: a first connecting rod slidably installed on the first side wall of the frame connected to the valve plate and respectively rollingly connected to a plurality of the rotating shafts; and a second connecting rod connected orthogonally to the first connecting rod, and one end extends out of the frame and out of the side plate. As the second connecting rod rotates, it drives the first connecting rod to reciprocate linearly in a plane parallel to the first side wall in a direction orthogonal to the extending direction of the second connecting rod to drive a plurality of the rotating shafts to rotate, so that a plurality of the valve plates rotate towards the upper or lower side of the frame.

[0012] According to an embodiment of the present disclosure, the driving assembly further includes a knob installed at one end of the second connecting rod extending out of the frame. The knob is detachably clamped on the side wall of the frame. In a state where the knob is detached from the side wall of the frame, the knob is rotated to drive the second connecting rod to rotate. In a state where the knob is clamped on the side wall of the frame, the second connecting rod is locked on the frame.

[0013] According to an embodiment of the present disclosure, the air flow velocity range adapted to trigger the alarm is 0.3 m / s to 1 m / s.

[0014] A second aspect of the present disclosure provides a rail vehicle, including: a vehicle body, on the side wall of the vehicle body, a plurality of side plates extending in the height direction are installed, and the plurality of side plates are sequentially connected and enclose a return air duct with the side wall; and at least one smoke alarm system for a rail vehicle according to the above embodiment, installed in the return air duct adjacent to the return air inlet of the air conditioner unit in the longitudinal direction.

[0015] For the smoke alarm system for a rail vehicle according to the above embodiment of the present disclosure, the alarm is installed on the upper side of the air outlet of the return air duct adjacent to the return air inlet of the air conditioner unit in the longitudinal direction. And a filtering part is installed near the air outlet of the return air duct to filter the dust mixed in the air flow flowing through the return air duct, so as to reduce the amount of dust adhering to the surface of the alarm. Further, a wind speed adjusting part is installed inside the return air duct, and the wind speed adjusting part is located below the filtering part to adjust the air flow velocity flowing to the side of the filtering part in the return air duct, adapt to the air flow velocity required to trigger the alarm, and reduce the amount of dust adhering to the surface of the alarm due to the influence of the air flow velocity while meeting the air flow velocity required by the alarm. Thereby, the sensitivity of the alarm is improved, so that when there is smoke and dust mixed in the air flow flowing to the alarm, the alarm is triggered in time to emit a smoke alarm signal. Description of the Drawings

[0016] Figure 1 is a schematic installation diagram of an existing smoke alarm system and a vehicle body;

[0017] Figure 2 is a schematic installation diagram of the smoke alarm system of the embodiment of the present disclosure and the vehicle body;

[0018] Figure 3 is a schematic installation diagram among the filtering part, the wind speed adjusting part and the return air duct of the smoke alarm system of the embodiment of the present disclosure;

[0019] Figure 4 is a three-dimensional schematic diagram of the filtering part of the smoke alarm system of the embodiment of the present disclosure;

[0020] Figure 5 is a side view of the filtering part of the smoke alarm system of the embodiment of the present disclosure;

[0021] Figure 6 is a side view of the wind speed adjusting part of the smoke alarm system of the embodiment of the present disclosure;

[0022] Figure 7 is a three-dimensional schematic diagram of the wind speed adjusting part of the smoke alarm system of the embodiment of the present disclosure; and

[0023] Figure 8 It is a cross-sectional view of the wind speed adjustment part of the smoke and fire alarm system according to an embodiment of the present disclosure.

[0024] In the figure:

[0025] 1 - Side wall;

[0026] 2 - Side plate;

[0027] 3 - Return air duct; 31 - Air outlet;

[0028] 4 - Alarm;

[0029] 5 - Filter part;

[0030] 51 - Filter screen; 511 - Clamping post;

[0031] 52 - Support frame; 521 - Base; 522 - Clamping claw; 523 - Clamping arm; 524 - Accommodating cavity;

[0032] 6 - Wind speed adjustment part;

[0033] 61 - Frame; 611 - Opening; 612 - Mounting part;

[0034] 62 - Valve plate; 621 - Rotating shaft;

[0035] 63 - Driving assembly; 631 - First connecting rod; 632 - Second connecting rod; 633 - Knob;

[0036] 7 - Vehicle body;

[0037] 8 - Air conditioning unit; 81 - Return air inlet. Detailed implementation manners

[0038] In order to make the purpose, technical solutions and advantages of the present disclosure more clear and understandable, the following will further describe the present disclosure in detail with reference to specific embodiments and the accompanying drawings.

[0039] However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

[0040] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0041] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0042] According to an inventive concept of an aspect of the present disclosure, there is provided a smoke alarm system for a rail vehicle. A plurality of side plates extending in the height direction are mounted on the side wall of the rail vehicle, and the plurality of side plates are sequentially connected and enclose a return air duct with the side wall; the alarm system includes: an alarm, mounted on the upper side of the air outlet of the return air duct adjacent to the return air inlet of the air conditioner unit in the longitudinal direction, and adapted to trigger the alarm to emit a smoke alarm when the air flow flowing to the alarm is mixed with soot; a filtering part, mounted near the air outlet of the return air duct, and adapted to filter the dust mixed in the air flow flowing through the return air duct to reduce the amount of dust adhering to the surface of the alarm; and a wind speed adjusting part, mounted inside the return air duct and located below the filtering part, and the wind speed adjusting part is configured to adjust the air flow velocity flowing to the filtering part side in the return air duct to adapt to the air flow velocity required to trigger the alarm.

[0043] Figure 1 is a schematic installation diagram of an existing smoke alarm system and a vehicle body; Figure 2 is a schematic installation diagram of the smoke alarm system of an embodiment of the present disclosure and a vehicle body; Figure 3 is a schematic installation diagram among the filtering part, the wind speed adjusting part and the return air duct of the smoke alarm system of an embodiment of the present disclosure.

[0044] According to an exemplary embodiment of the present disclosure, please refer to Figures 1 - 3 , there is provided a smoke alarm system for a rail vehicle. A plurality of side plates 2 extending in the height direction are mounted on the side wall 1 of the rail vehicle, and the plurality of side plates 2 are sequentially connected and enclose a return air duct 3 with the side wall 1. The alarm system includes an alarm 4, a filtering part 5 and a wind speed adjusting part 6. The alarm 4 is mounted on the upper side of the air outlet 31 of the return air duct 3 adjacent to the return air inlet 81 of the air conditioner unit 8 in the longitudinal direction, and is adapted to trigger the alarm 4 to emit a smoke alarm when the air flow flowing to the alarm 4 is mixed with soot. The filtering part 5 is mounted near the air outlet 31 of the return air duct 3, and is adapted to filter the dust mixed in the air flow flowing through the return air duct 3 to reduce the amount of dust adhering to the surface of the alarm 4. The wind speed adjusting part 6 is mounted inside the return air duct 3 and located below the filtering part 5, and the wind speed adjusting part 6 is configured to adjust the air flow velocity flowing to the filtering part 5 side in the return air duct 3 to adapt to the air flow velocity required to trigger the alarm 4.

[0045] In this embodiment, the alarm 4 is installed above the air outlet 31 of the return air duct 3 that is longitudinally adjacent to the return air outlet 81 of the air conditioner unit 8. A filtering part 5 is installed near the air outlet 31 of the return air duct 3 to filter the dust mixed in the air flow passing through the return air duct 3, so as to reduce the amount of dust adhering to the surface of the alarm 4. Further, a wind speed adjusting part 6 is installed inside the return air duct 3. The wind speed adjusting part 6 is located below the filtering part 5 to adjust the air flow velocity flowing towards the filtering part 5 in the return air duct 3, which is adapted to the air flow velocity required to trigger the alarm 4, and to reduce the amount of dust adhering to the surface of the alarm 4 due to the influence of the air flow velocity when the air flow velocity required by the alarm 4 is satisfied. Thereby, the sensitivity of the alarm 4 is improved, so that when there is smoke and dust mixed in the air flow flowing to the alarm 4, the alarm 4 is triggered in time to send out a smoke and fire alarm signal.

[0046] It should be noted that in this embodiment, under the action of the return air outlet 81 of the air conditioner unit 8, the air flow inside the vehicle body 7 flows towards the return air duct 3 and blows towards the alarm 4 through the air outlet 31 of the return air duct 3. When there is smoke and dust mixed in the air flow inside the vehicle body 7, when the air flow mixed with smoke and dust flows to the surface of the alarm 4, the alarm 4 is triggered to send out a smoke and dust alarm.

[0047] Further, referring to Figures 1 - 2 , it can be seen that the smoke and fire alarm system of this embodiment changes the installation position of the alarm 4 inside the vehicle body 7, and installs a filtering part 5 near the air outlet 31 of the return air duct 3 to reduce the amount of dust adhering to the surface of the alarm 4, thereby improving the sensitivity of the alarm 4, and further improving the driving safety of the rail vehicle.

[0048] It should be noted that in this embodiment, the longitudinal direction refers to the traveling direction of the rail vehicle.

[0049] Figure 4 is a three-dimensional schematic diagram of the filtering part of the smoke and fire alarm system of the present disclosure embodiment; Figure 5 is a side view of the filtering part of the smoke and fire alarm system of the present disclosure embodiment.

[0050] In some exemplary embodiments, referring to Figures 3 - 5 , the filtering part 5 includes a support frame 52 and a filter screen 51. The support frame 52 is installed near the air outlet 31 of the return air duct 3. The filter screen 51 is detachably installed on the upper side of the support frame 52 to horizontally hold the filter screen 51 on the air outlet 31 of the return air duct 3.

[0051] In this embodiment, the support frame 52 is installed near the air outlet 31 of the return air duct 3, and the filter screen 51 is detachably installed on the upper side of the support frame 52 to horizontally hold the filter screen 51 on the air outlet 31 of the return air duct 3. Under the action of the support frame 52, the filter screen 51 covers the air outlet 31 of the return air duct 3, so that the airflow flowing inside the return air duct 3 to the alarm 4 adsorbs the dust in the airflow passing through the filter screen 51 on the filter screen 51 under the action of the filter screen 51, thereby reducing the dust adsorbed on the alarm 4 and further improving the sensitivity of the alarm 4.

[0052] Further, detachably installing the filter screen 51 on the upper side of the support frame 52 can meet the requirements of regular disassembly, cleaning, and replacement of the filter screen 51.

[0053] In some exemplary embodiments, referring to Figures 3 - 5 , the support frame 52 includes a plurality of bases 521 and a plurality of clamping claws 522. The plurality of bases 521 are respectively installed on the tops of the plurality of side plates 2. A clamping claw 522 is provided on the top of each base 521, and each clamping claw 522 clamps one side edge of the filter screen 51.

[0054] In this embodiment, by installing a base 521 on the top of each side plate 2, providing a clamping claw 522 on the top of each base 521, and making each clamping claw 522 clamp one side edge of the filter screen 51, the filter screen 51 is combined on the tops of the plurality of side plates 2, so as to horizontally hold the filter screen 51 on the air outlet 31 of the return air duct 3 to cover the air outlet 31 of the return air duct 3.

[0055] In some exemplary embodiments, referring to Figures 3 - 5 , a clamping post 511 parallel to the edge is provided on the lower side of each edge of the filter screen 51. The clamping claw 522 includes two clamping arms 523. The two clamping arms 523 are formed on the top of the base 521 facing each other. Each clamping arm 523 is made of an elastic material. Under the extrusion of the clamping post 511, the two clamping arms 523 tilt in the direction away from each other to allow the clamping post 511 to extend into and be clamped between the two clamping arms 523.

[0056] In this embodiment, a clamping post 511 parallel to the edge is provided on the lower side of each edge of the filter screen 51. The extending direction of each clamping post 511 is the same as the extending direction of the edge of the connected filter screen 51. Two clamping arms 523 are formed on the top of the base 521 facing each other, and an accommodation cavity 524 for accommodating the clamping post 511 is defined between the two clamping arms 523 and the top of the base 521. Each clamping arm 523 is made of an elastic material, so that under the extrusion of the clamping post 511, the two clamping arms 523 tilt in the direction away from each other to allow the clamping post 511 to extend into the accommodation cavity 524, and when the clamping post 511 is in the state of extending into the interior of the accommodation cavity 524, the two clamping arms 523 reset in the direction close to each other to clamp the clamping post 511 inside the accommodation cavity 524, thereby binding the edge of the filter screen 51 to the base 521. Thus, under the action of a plurality of clamping claws 522, the plurality of edges of the filter screen 51 are respectively bound to a plurality of corresponding bases 521, so as to horizontally hold the filter screen 51 on the air outlet 31 of the return air duct 3.

[0057] In some exemplary embodiments, referring to Figures 3 - 5 , the base 521 is adhesively bonded or screwed to the top of the side plate 2.

[0058] In this embodiment, the bottom of the base 521 can be adhesively bonded to the top of the side plate 2 through an adhesive. Alternatively, bolts extending in the height direction can be installed at the bottom of the base 521, and threaded holes mating with the bolts are formed at the top of the side plate 2. By mating the bolts with the threaded holes formed at the top of the side plate 2, the base 521 is installed on the top of the side plate 2.

[0059] Figure 6 is a side view of the air velocity adjusting part of the smoke alarm system according to an embodiment of the present disclosure; Figure 7 is a three-dimensional schematic diagram of the air velocity adjusting part of the smoke alarm system according to an embodiment of the present disclosure; Figure 8 is a cross-sectional view of the air velocity adjusting part of the smoke alarm system according to an embodiment of the present disclosure.

[0060] In some exemplary embodiments, referring to Figure 3 to Figures 6 - 8, the wind speed adjustment part 6 includes a frame 61, a plurality of valve plates 62 and a driving assembly 63. The frame 61 is configured as a border with a substantially rectangular cross-section. The circumferential side wall of the frame 61 fits against the inner wall of the return air duct 3. Openings 611 communicating with the return air duct 3 are respectively formed on the upper and lower sides of the frame 61. The plurality of valve plates 62 are installed inside the frame 61 in parallel. Two opposite edges of each valve plate 62 are respectively rotatably connected to two opposite sides of the frame 61. The driving assembly 63 is respectively connected to the plurality of valve plates 62, and one end extends out of the frame 61 and out of the side plate 2, and is adapted to drive the plurality of valve plates 62 to rotate towards the upper or lower side of the frame 61 to adjust the size of the area of the opening 611 blocked by the valve plates 62.

[0061] In this embodiment, the circumferential side wall of the frame 61 fits against the inner wall of the return air duct 3, so that the frame 61 is exactly embedded inside the return air duct 3. Openings 611 communicating with the return air duct 3 are respectively formed on the upper and lower sides of the frame 61 to allow the air flow inside the return air duct 3 to pass through the frame 61 and flow towards the alarm 4 located above the air outlet 31 of the return air duct 3. The plurality of valve plates 62 are installed inside the frame 61 in parallel. Two opposite edges of each valve plate 62 are respectively rotatably connected to two opposite sides of the frame 61. The driving assembly 63 is respectively connected to the plurality of valve plates 62, and one end extends out of the frame 61 and out of the side plate 2. By rotating the end of the driving assembly 63 extending out of the side plate 2, the plurality of valve plates 62 are driven to rotate towards the upper or lower side of the frame 61, so as to adjust the size of the area of the opening 611 blocked by the valve plates 62, and further adjust the size of the air flow rate passing through the upper and lower sides of the frame 61 and blowing towards the alarm 4.

[0062] It should be noted that, in this embodiment, one side of the frame 61 facing the side wall 1 is connected to the side wall 1 through a mounting member 612. Among them, the mounting member 612 can be selected as a bolt. The mounting member 612 passes through one side of the frame 61 facing the side wall 1 and is threadedly connected to the side wall 1 to connect the frame 61 to the side wall 1.

[0063] In addition, by adjusting the inclination angle of the valve plate 62 of the wind speed adjustment part 6 relative to the upper and lower sides of the frame 61 to change the air flow rate passing through the upper and lower sides of the frame 61, it is also possible to adjust the air flow rates flowing through different return air ducts 3 to be consistent, and improve the temperature and humidity uniformity at various places inside the vehicle body.

[0064] In some exemplary embodiments, refer to Figure 3 and Figures 6 - 8, each valve plate 62 is connected to the frame 61 through a rotating shaft 621. The driving assembly 63 includes a first connecting rod 631 and a second connecting rod 632. The first connecting rod 631 is slidably mounted on the first side wall 613 of the frame 61 connected to the valve plate 62 and is respectively in rolling connection with a plurality of rotating shafts 621. The second connecting rod 632 is connected orthogonally to the first connecting rod 631, and one end extends out of the frame 61 and out of the side plate 2. As the second connecting rod 632 rotates, it drives the first connecting rod 631 to reciprocate linearly in a plane parallel to the first side wall 613 and in a direction orthogonal to the extending direction of the second connecting rod 632, so as to drive a plurality of rotating shafts 621 to rotate, causing a plurality of valve plates 62 to rotate towards the upper side or the lower side of the frame 61.

[0065] In this embodiment, by providing a driving assembly 63 including a first connecting rod 631 and a second connecting rod 632. The first connecting rod 631 is slidably mounted on the first side wall 613 of the frame 61 connected to the valve plate 62 and is respectively in rolling connection with a plurality of rotating shafts 621. The second connecting rod 632 is connected orthogonally to the first connecting rod 631, and one end extends out of the frame 61 and out of the side plate 2. By rotating one end of the second connecting rod 632 extending out of the side plate 2, the first connecting rod 631 is driven to reciprocate linearly in a plane parallel to the first side wall 613 and in a direction orthogonal to the extending direction of the second connecting rod 632 (such as Figure 8 the left and right direction shown by the arrow X in the figure), so as to drive a plurality of valve plates 62 to rotate synchronously towards the upper side or the lower side of the frame 61, thereby adjusting the size of the area blocked by the plurality of valve plates 62 in the opening 611, so as to adjust the flow rate of the air flow allowed to pass through the upper and lower sides of the frame 61.

[0066] It should be noted that, in this embodiment, the rotating shaft 621 is installed on the axis passing through the geometric center of the valve plate 62, so that the two parts of the valve plate 61 divided by the rotating shaft 621 are symmetric about the rotating shaft 621. The second connecting rod 632 is installed in the middle of the first connecting rod 631 along the extending direction. On the one hand, when rotating one end of the second connecting rod 632 extending out of the side plate 2, it is convenient for a plurality of valve plates 62 to rotate synchronously. On the other hand, during the process of the second connecting rod 632 driving a plurality of valve plates 62 to rotate through the first connecting rod 631, the rotational torque of the valve plate 62 is reduced, so that the user is more labor-saving and easy to operate during the operation of adjusting the inclination angle of the valve plate 62 relative to the upper and lower sides of the frame 61.

[0067] In some exemplary embodiments, refer to Figure 3 and Figures 6 - 8, the driving component 63 further includes a knob 633. The knob 633 is installed at one end of the second connecting rod 632 extending out of the frame 61. The knob 633 is detachably clamped on the side wall of the frame 61. In a state where the knob 633 is detached from the side wall of the frame 61, the knob 633 is rotated to drive the second connecting rod 632 to rotate. In a state where the knob 633 is clamped on the side wall of the frame 61, the second connecting rod 632 is locked on the frame 61.

[0068] In this embodiment, by installing the knob 633 at one end of the second connecting rod 632 extending out of the frame 61 and setting the knob 633 to be detachably connected to the side wall of the frame 61, on the one hand, in a state where the knob 633 is detached from the side wall of the frame 61, it is convenient for the user to rotate the second connecting rod 632 and drive a plurality of valve plates 62 to rotate through the first connecting rod 631. On the other hand, after the inclination angle of the valve plate 61 relative to the upper and lower sides of the frame 61 is adjusted and the knob 633 is clamped on the side wall of the frame 61, the second connecting rod 632 is locked on the frame 61 to limit the rotation of the second connecting rod 632, thereby locking a plurality of valve plates 62 on the frame 61 to prevent the valve plates 62 from rotating relative to the upper and lower sides of the frame 61. During the process of air flow passing through the valve plates 62 and passing through the openings 611 formed on the upper and lower sides of the frame 61, the valve plates 62 are prevented from rotating relative to the upper and lower sides of the frame 61, and the size of the area where the openings 611 are blocked by the valve plates 62 is kept unchanged, so that the air flow rate flowing through the upper and lower sides of the frame 61 and flowing to the alarm 4 located above the opening 611 remains unchanged, and further the air flow velocity flowing to the alarm 4 located above the opening 611 remains unchanged.

[0069] In some exemplary embodiments, refer to Figure 3 , the air flow velocity range adapted to trigger the alarm 4 is 0.3 m / s to 1 m / s.

[0070] In this embodiment, the alarm 4 needs to be triggered by air flow blowing towards the surface of the alarm 4 at a certain flow velocity. In other words, only when the flow velocity of the air flow blowing towards the alarm 4 meets the predetermined flow velocity range, when the air flow mixed with soot blows to the surface of the alarm 4, the alarm 4 can be triggered to give an alarm outward.

[0071] Further, in this embodiment, the air flow velocity range required to trigger the alarm 4 is 0.3 m / s to 1 m / s.

[0072] According to the exemplary embodiments of the present disclosure, please refer to Figure 2, there is provided a rail vehicle, including a car body 7 and at least one smoke alarm system for rail vehicles as described in the above embodiments. A plurality of side plates 2 extending in the height direction are installed on the side wall 1 of the car body 7. The plurality of side plates 2 are connected in sequence and enclose a return air duct 3 with the side wall 1. At least one smoke alarm system for rail vehicles as described in the above embodiments is installed in the return air duct 3 adjacent to the air return opening 81 of the air conditioner unit 8 in the longitudinal direction.

[0073] Through the above implementation manner, compared with the existing rail vehicles, the installation position of the alarm 4 inside the car body 7 is changed, and a filtering part 5 is installed near the air outlet 31 of the return air duct 3 to reduce the amount of dust attached to the surface of the alarm 4, thereby improving the sensitivity of the alarm 4 and further improving the driving safety of the rail vehicle.

[0074] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It should be noted that the implementation manners not depicted or described in the drawings or the text of the specification are all forms known to those of ordinary skill in the art and have not been described in detail. In addition, the above definitions of each component are not limited to the various specific structures, shapes or manners mentioned in the embodiments, and those of ordinary skill in the art can make simple changes or replacements to them.

[0075] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly recited in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features recited in the various embodiments and / or claims of the present disclosure can be combined and / or combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0076] The specific embodiments described above further elaborate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above are only specific embodiments of the present disclosure and are not used to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A fire and smoke alarm system for a rail vehicle, wherein a plurality of side panels (2) extending in a height direction are mounted on a side wall (1) of the rail vehicle, wherein the plurality of side panels (2) are connected in sequence and enclose an air return duct (3) with the side wall (1); the alarm system comprises: An alarm (4) is installed on the upper side of an air outlet (31) of a return air duct (3) adjacent to a return air outlet (81) of an air conditioning unit (8) in a longitudinal direction, and is adapted to trigger the alarm (4) to issue a smoke and fire alarm when smoke and dust are mixed in the airflow flowing onto the alarm (4); A filter unit (5) is installed near the air outlet (31) of the return air duct (3) and is suitable for filtering dust mixed in the air flow passing through the return air duct (3) to reduce the amount of dust attached to the surface of the alarm (4); as well as A wind speed regulating unit (6) is installed inside the return air duct (3) and is located at the lower side of the filter unit (5). The wind speed regulating unit (6) is configured to adjust the air flow velocity flowing from the return air duct (3) to one side of the filter unit (5) so as to adapt to the air flow velocity required to trigger the alarm (4).

2. The pyrotechnic alarm system for a rail vehicle according to claim 1, wherein: The filter unit (5) comprises: A support frame (52) is installed near the air outlet (31) of the return air duct (3); and The filter screen (51) is detachably mounted on the upper side of the support frame (52) so as to horizontally hold the filter screen (51) on the air outlet (31) of the return air duct (3).

3. The pyrotechnic alarm system for a rail vehicle according to claim 2, wherein: The support frame (52) comprises: A plurality of bases (521) are respectively mounted on the top of the plurality of side panels (2); and A plurality of clamping claws (522), one clamping claw (522) being arranged on the top of each base (521), and each clamping claw (522) clamps one side edge of the filter screen (51).

4. According to the smoke and fire alarm system for rail vehicles according to claim 3, a clamping column (511) parallel to the edge is provided on the lower side of each edge of the filter (51), and the clamping claw (522) comprises: Two clamping arms (523) are formed on the top of the base (521) facing each other, and each of the clamping arms (523) is made of elastic material. Under the pressure of the clamping column (511), the two clamping arms (523) are inclined in directions away from each other to allow the clamping column (511) to extend into and be clamped between the two clamping arms (523).

5. The pyrotechnic alarm system for a rail vehicle according to claim 4, wherein: The base (521) is bonded or threadedly connected to the top of the side panel (2).

6. The pyrotechnic alarm system for a rail vehicle according to claim 1, wherein: The wind speed regulating unit (6) comprises: The frame (61) is constructed as a frame with a substantially rectangular cross section, the circumferential side wall of the frame (61) is in contact with the inner wall of the return air duct (3), and the upper and lower sides of the frame (61) are respectively formed with openings (611) that are in communication with the return air duct (3); A plurality of valve plates (62) are installed in parallel inside the frame (61), and two edges of each valve plate (62) facing each other are rotatably connected to two sides of the frame (61) facing each other; and The driving assembly (63) is respectively connected to the plurality of valve plates (62), and one end of which extends out of the frame (61) and extends out of the side plate (2), and is suitable for driving the plurality of valve plates (62) to rotate toward the upper side or the lower side of the frame (61) to adjust the size of the area of ​​the opening (611) blocked by the valve plates (62).

7. The pyrotechnic alarm system for a rail vehicle according to claim 6, wherein: Each valve plate (62) is connected to the frame (61) via a rotating shaft (621); the driving assembly (63) comprises: A first connecting rod (631) is slidably mounted on a first side wall (613) of the frame (61) connected to the valve plate (62), and is respectively rollingly connected to the plurality of rotating shafts (621); and The second connecting rod (632) is orthogonally connected to the first connecting rod (631), and one end of which extends out of the frame (61) and the side plate (2). The second connecting rod (632) rotates with the first connecting rod (631) to drive the first connecting rod (631) to move back and forth in a plane parallel to the first side wall (613) and in a direction orthogonal to the extension direction of the second connecting rod (632), so as to drive the multiple rotating shafts (621) to rotate, so that the multiple valve plates (62) rotate toward the upper side or the lower side of the frame (61).

8. The pyrotechnic alarm system for a rail vehicle according to claim 7, wherein: The driving assembly (63) also includes a knob (633) mounted on one end of the second connecting rod (632) extending out of the frame (61); the knob (633) is detachably engaged with the side wall of the frame (61); when the knob (633) is detached from the side wall of the frame (61), the knob (633) is rotated to drive the second connecting rod (632) to rotate; when the knob (633) is engaged with the side wall of the frame (61), the second connecting rod (632) is locked on the frame (61).

9. The pyrotechnic alarm system for a rail vehicle according to claim 1, wherein: The air flow velocity range required for triggering the alarm (4) is 0.3 m / s to 1 m / s.

10. A rail vehicle comprising: A vehicle body (7), wherein a plurality of side panels (2) extending in a height direction are mounted on a side wall (1) of the vehicle body (7), and the plurality of side panels (2) are connected in sequence and enclose an air return duct (3) with the side wall (1); and At least one smoke and fire alarm system for rail vehicles according to any one of claims 1 to 9 is installed in a return air duct (3) adjacent to a return air outlet (81) of an air conditioning unit (8) in a longitudinal direction.

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