A safety alarm for building construction

Abstract

The present invention discloses a safety alarm for building construction, and specifically relates to the technical field of building construction alarms. The alarm comprises an alarm body and a supporting ring frame, wherein the supporting ring frame is used for movably installing the alarm body inside the supporting ring frame, and a trigger switch of the alarm body is located outside the supporting ring frame, a mounting frame is installed at the top of the supporting ring frame, and the mounting frame is used for installing the supporting ring frame on a wall, and a trigger component is used for triggering the alarm body in the supporting ring frame to realize triggering an alarm, and for the alarm body to detect and alarm an area where a fire source or smoke is just formed. The present invention can realize a touch alarm for the alarm body through the setting of the trigger component, so that the alarm body can effectively capture the flame and heat in the initial stage, reduce the occurrence of missed alarms of the alarm body, and enable the alarm body to respond to the initial stage of combustion in time, thereby increasing the safety of building construction.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction alarms, and in particular to a safety alarm for building construction. Background Art

[0002] Construction is an important production activity in the implementation stage of engineering construction. It involves the process of converting the concepts on the design drawings into actual buildings. In the process of construction, many building materials are needed, and different raw materials will be piled in different stacking places. Because some special building materials are used in construction, and the building materials themselves are flammable and explosive, alarms are needed to monitor and warn of building materials to avoid fires during construction. In the process of fire prevention, safety alarms generally trigger the alarm function by detecting a large amount of smoke. However, burning materials are divided into two situations: the initial combustion stage and the larger combustion stage. Although the alarm can monitor the occurrence of fire to a certain extent, it can often only trigger the alarm when the fire reaches a certain scale, resulting in the flame and heat in the initial stage of combustion being difficult to be effectively captured by the alarm, resulting in the occurrence of missed alarms, which is not conducive to the alarm's timely response to the initial stage of combustion and affects the safety of construction. Summary of the invention

[0003] The object of the present invention is to provide a safety alarm for building construction to solve the above-mentioned deficiencies in the technology.

[0004] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a safety alarm for construction, comprising an alarm body and a support ring frame, wherein the support ring frame is used to movably install the alarm body inside the support ring frame, and the alarm body trigger switch is located outside the support ring frame, and a mounting frame is installed on the top of the support ring frame, and the mounting frame is used to install the support ring frame on a wall;

[0005] A trigger assembly is used to trigger the alarm body in the support ring frame, and to detect and alarm the area where a fire source or smoke is just formed. The trigger assembly includes a ring frame sleeved on the outside of the alarm body and a ring groove provided in the support ring frame for the ring frame to move. Two symmetrical ear plates are fixed to the outside of the ring frame, and two guide grooves for the two ear plates to move are symmetrically provided in the ring groove. An ear plate frame matching the ear plates is installed in the guide groove. A support assembly for connection is provided between the guide groove and the ear plate frame. An arc frame is provided on the support ring frame, and the arc frame is used to cooperate with the support assembly and the ear plate frame. A spring seat is installed between the support ring frame and the arc frame, and a traction spring is commonly connected between the two spring seats. A control is provided on the support ring frame. The component is used to monitor the fire source and trigger the arc frame to cooperate with the alarm body. The mounting frame is provided with a range component, which is used to rotate the support ring frame and the control component along the bottom of the mounting frame. An air induction component that cooperates with the support component is provided below the support ring frame, and the smoke at the bottom of the support ring frame is sucked in to cooperate with the alarm body; and the alarm body can not only trigger the alarm, but also realize natural smoke alarm, and the natural smoke alarm refers to the triggering of the alarm operation when the smoke or fire source forms a certain scale, so that the alarm can be more flexible, ensuring the stable operation of the alarm and ensuring the stable operation of the alarm body during the construction process. Moreover, the inclination between the ear plate and the ear plate frame is coordinated, so that one side of the ear plate moves downward along one side of the ear plate frame, which can realize the guided movement of the ring frame along the ring groove.

[0006] Preferably, an elastic sleeve is also fixed in the ring frame, and the elastic sleeve is fitly sleeved on the outside of the alarm body, and the elastic sleeve is elastic; and the elastic sleeve itself is elastic, so that the elastic sleeve and the alarm body can remain in a taut state, ensuring a stable connection between the alarm body and the ring frame. In addition, the elastic sleeve and the alarm body are in a taut state, which facilitates the removal of the alarm body from the mounting frame and the supporting ring frame, facilitates quick disassembly and assembly of the alarm body or replacement of alarm bodies of different sizes for installation and use, facilitates regular calibration and maintenance of the alarm to ensure its normal operation, and facilitates daily inspection, cleaning and maintenance work.

[0007] Preferably, the control component includes a flame detector and a controller respectively fixed to the outside of the support ring frame and an ear hook fixed to the bottom of the arc frame, and the flame detector and the controller are connected by wires, a telescope is installed at one end of the controller, and the end of the telescope away from the controller is plugged and unplugged with the bottom of the ear hook, the outside of the support ring frame is provided with a guide groove for the movement of the arc frame that is communicated with the inside of the guide groove, and a guide shaft is rotatably connected in the arc frame, and the guide shaft is located in the guide groove; and the controller is a plc controller, and the principles of the flame detector and the controller are both prior art, therefore, the structure is common knowledge known in the art, so it is not described in detail in this application, and the flame detector and the controller are used in this device to realize electrical control connection of the arc frame, ensure that early warning operations are realized for building materials during construction, so that stable operation is maintained during construction, and the guide groove is installed between the guide shaft to ensure that the arc frame moves along the guide groove, so that the arc frame can maintain good coordination with the support component and the ear plate frame, and ensure that the alarm body can move downward along the support ring frame and trigger the alarm operation.

[0008] Preferably, the support assembly includes a rotating column sleeved on the bottom of the ear plate frame and an arc block rotatably connected to the guide groove and cooperating with the arc frame, wherein a rotating shaft is installed in the guide groove and the rotating shaft is sleeved in the arc block, a rotating groove is opened in the guide groove, and the rotating groove is located below the arc block, one end of the rotating column extends into the rotating groove and is fixed with a supporting ring, a limiting component for connection is provided between the support ring and the arc block, and a frame box door is hinged on the side of the support ring frame close to the controller; and one end of the arc block is in contact with the bottom of the arc frame located inside the guide groove, so that the ear plate frame and the ear plate are kept in a horizontal state, which is used to stably support the ring frame in the ring groove, ensure that the alarm body remains stable in the support ring frame in a non-alarm state to ensure its normal operation, and the frame box door facilitates observation and installation of the internal structure of the guide groove, in addition, the coordinated cooperation of the support assembly, ear plate frame, ear plate, arc frame and traction spring can adjust the installation position according to actual needs.

[0009] Preferably, the support assembly also includes a support column fixed in the annular groove, the support column is slidably connected in the ring frame, and a support spring is also commonly connected between the top of the ring frame and the top wall inside the annular groove, and the support spring is sleeved on the outside of the support column; and the support spring itself is elastic, so that the elastic force of the support spring itself can give a downward thrust to one side of the ring frame, which is conducive to the ring frame to move downward quickly along the annular groove, so that the alarm body extends downward along the support ring frame, which is convenient for the alarm body to approach the area where smoke is generated, timely discover fire hazards and take emergency measures, thereby improving the detection sensitivity of smoke. In addition, the support spring pushes the alarm body to move downward along the support ring frame, and can stably touch the air induced assembly, thereby ensuring that the alarm body is used to start the air induced assembly during the downward movement, which is conducive to the coordinated cooperation between the air induced assembly and the alarm body.

[0010] Preferably, the limiting assembly includes two limiting plates fixedly connected to the outside of the support ring and a limiting block fixedly connected to the bottom of the arc block, and the limiting block is plugged in and out between the two limiting plates, and a connecting seat is installed between the top of the arc block and the guide groove, and a ejection spring is commonly connected between the two connecting seats; and the limiting block is plugged in and out between the two limiting plates, so that the limiting block has a resistance effect on the two limiting plates, and is used to limit the rotation direction of the support ring in the rotating groove, so that the support ring requires a specific operating sequence to start or close in the rotating groove. Limiting the rotation direction can reduce the possibility of erroneous operation, ensure the safety of the device, and is conducive to the stable operation of the alarm body during construction.

[0011] Preferably, the range component includes a rotating frame fixed to the top of the supporting ring frame and a positioning groove provided at the bottom of the mounting frame for the rotating frame to rotate, a first gear is fixed to the top of the rotating frame, and the first gear is located in the positioning groove, a mounting barrel box communicating with the inside of the positioning groove is fixed to the outside of the mounting frame, a control motor is installed on the outside of the mounting barrel box, a second gear is fixed to the bottom end of the control motor, and the second gear is located in the mounting barrel box and meshes with the first gear; and the second gear and the first gear are meshed with each other so that the rotation of the second gear can drive the first gear to rotate slowly along the positioning groove, which is beneficial to the circular movement of the supporting ring frame and the flame detector along the bottom of the mounting frame, so that the flame detector can cover a wider area, ensuring comprehensive monitoring of the surrounding environment, effectively reducing these blind spots, improving the integrity of monitoring, thereby expanding the monitoring range, and the flame detector can detect the fire source more quickly, thereby improving the response speed of the alarm system.

[0012] Preferably, the induced draft assembly includes an induced draft tube fixed to the bottom of the supporting ring frame, a supporting blade frame fixedly connected to the induced draft tube, and a rotating motor installed in the supporting blade frame, and a trigger switch member matching the alarm body is installed at the top of the rotating motor, and an induced draft blade is installed at the bottom of the rotating motor; and an electric wire connection is maintained between the trigger switch member and the rotating motor, so that the alarm body hits downward on the trigger switch member to trigger the driving of the rotating motor, so that the generated smoke is actively inhaled when floating upward, which is conducive to being captured by the alarm body, so that the alarm body can cover a wider area, thereby improving the efficiency of fire monitoring. In addition, the induced draft blade has a trumpet-shaped structure, which can significantly increase the air inlet area of ​​the air intake port, so that more air can enter the interior of the alarm body, which can improve the accuracy and sensitivity of detection. At the same time, it can prevent large particles from directly entering the alarm body, extend the service life of the alarm body, and reduce the possibility of false alarms.

[0013] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0014] 1. Through the setting of the trigger component, the alarm body can be touched to alarm, which is convenient for the alarm body to effectively capture the flame and heat in the initial stage, reduce the occurrence of missed alarms of the alarm body, and make the alarm body respond to the initial stage of combustion in time, thereby increasing the safety of construction.

[0015] 2. Through the arrangement of the ring frame, elastic sleeve, alarm body and supporting ring frame, the elastic sleeve and the alarm body can be in an elastically tightened state, which facilitates the removal of the alarm body from the mounting frame and the supporting ring frame, and facilitates the rapid disassembly and assembly of the alarm body or replacement of alarm bodies of different sizes for installation and use, which is beneficial for regular calibration and maintenance of the alarm body to ensure its normal operation, thereby further improving the safety of construction.

[0016] 3. Through the arrangement of the support assembly, the ear plate frame and the ear plate, the ear plate frame and the ear plate can be kept horizontal, which is used to stably support the ring frame in the ring groove, ensuring that the alarm body remains stable in the supporting ring frame in the non-alarm state to ensure its normal operation.

[0017] 4. Through the arrangement of the support column, support spring, ring frame, draft assembly and alarm body, a downward thrust can be given to one side of the ring frame, which is conducive to the rapid downward movement of the ring frame along the ring groove, so that the alarm body extends downward along the support ring frame, which is convenient for the alarm body to approach the area where smoke is generated, timely discover fire hazards and take emergency measures, thereby improving the detection sensitivity of smoke. In addition, the support spring pushes the alarm body to move downward along the support ring frame, and can stably touch the draft assembly, thereby ensuring that the alarm body is used to start the draft assembly during the downward movement, which is conducive to the coordinated cooperation between the draft assembly and the alarm body.

[0018] 5. By setting the limiting component, the rotation direction of the support ring in the rotation groove can be limited, so that the support ring requires a specific operation sequence in the rotation groove to start or close. Limiting the rotation direction can reduce the possibility of erroneous operation, ensure the safety of the device, and facilitate the stable operation of the alarm body during the construction process.

[0019] 6. Through the setting of the range component, the support ring frame and the flame detector can be driven to move in a circle along the bottom of the mounting frame, so that the flame detector can cover a wider area, ensuring comprehensive monitoring of the surrounding environment, which can effectively reduce these blind spots and improve the integrity of monitoring, thereby expanding the monitoring range. The flame detector can detect the fire source more quickly and improve the response speed of the alarm system.

[0020] 7. By setting up the draft assembly, smoke can be actively sucked in when it floats upward, which is conducive to being captured by the alarm body, so that the alarm body can cover a wider area, thereby improving the efficiency of fire monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the installation of the ring frame and the alarm body of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the installation of the elastic sleeve and the ring frame of the present invention;

[0025] Figure 4 For the present invention Figure 2 A partial enlarged view of the middle part;

[0026] Figure 5 It is a schematic diagram of the structure of the assembly of the retractor and the ear hook of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the assembly of the elastic sleeve and the alarm body of the present invention;

[0028] Figure 7 For the present invention Figure 6 A partial enlarged view of point B in the middle;

[0029] Figure 8 It is a schematic diagram of the structure of the components within the scope of the present invention;

[0030] Fig. 9 It is a schematic structural diagram of the air induction assembly of the present invention.

[0031] Description of reference numerals:

[0032] 1. Mounting frame; 11. Support ring frame; 12. Alarm body;

[0033] 2. trigger assembly; 21. ring groove; 22. elastic sleeve; 23. ring frame; 24. ear plate; 25. ear plate frame; 26. guide groove; 27. arc frame; 28. traction spring; 29. ​​spring seat;

[0034] 3. Control assembly; 31. Flame detector; 32. Guide groove; 33. Guide shaft; 34. Ear hook; 35. Retractor; 36. Controller;

[0035] 4. Support assembly; 41. Support column; 42. Support spring; 43. Rotation column; 44. Rack door; 45. Rotation slot; 46. Support ring; 47. Arc block; 48. Rotation shaft;

[0036] 5. Restriction assembly; 51. Connecting seat; 52. Ejection spring; 53. Restriction block; 54. Restriction plate;

[0037] 6. Range assembly; 61. Rotating frame; 62. Positioning slot; 63. First gear; 64. Mounting barrel box; 65. Second gear; 66. Control motor;

[0038] 7. induced draft assembly; 71. induced draft tube; 72. induced draft blades; 73. supporting blade frame; 74. trigger switch member; 75. rotating motor. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] The present invention provides Figure 1-Figure 9A safety alarm for construction shown in the figure comprises an alarm body 12 and a support ring frame 11, wherein the support ring frame 11 is used to movably install the alarm body 12 inside the support ring frame 11, and the trigger switch of the alarm body 12 is located outside the support ring frame 11, and a mounting frame 1 is installed on the top of the support ring frame 11, and the mounting frame 1 is used to install the support ring frame 11 on a wall;

[0041] The trigger assembly 2 is used to trigger the alarm body 12 in the support ring frame 11, and the alarm body 12 detects and alarms the area where the fire source or smoke is just formed. The trigger assembly 2 includes a ring frame 23 sleeved on the outside of the alarm body 12 and a ring groove 21 provided in the support ring frame 11 for the ring frame 23 to move. Two symmetrical ear plates 24 are fixed to the outside of the ring frame 23. Two guide grooves 26 for the two ear plates 24 to move are symmetrically provided in the ring groove 21. Ear plates matching with the ear plates 24 are installed in the guide grooves 26. A support assembly 4 for connection is provided between the guide groove 26 and the ear plate frame 25, an arc frame 27 is provided on the support ring frame 11, and the arc frame 27 is used to cooperate with the support assembly 4 and the ear plate frame 25, a spring seat 29 is installed between the support ring frame 11 and the arc frame 27, and a traction spring 28 is commonly connected between the two spring seats 29, a control assembly 3 is provided on the support ring frame 11, which is used to monitor the fire source and trigger the arc frame 27 to cooperate with the alarm body 12, and a range assembly 6 is provided on the mounting frame 1 , used to rotate the support ring frame 11 and the control component 3 along the bottom of the mounting frame 1, an air induction component 7 matched with the support component 4 is arranged under the support ring frame 11, and the smoke at the bottom of the support ring frame 11 is sucked in to cooperate with the alarm body 12; an elastic sleeve 22 is also fixed in the ring frame 23, and the elastic sleeve 22 is fitted on the outside of the alarm body 12, and the elastic sleeve 22 is elastic; the air induction component 7 includes an air induction tube 71 fixed to the bottom of the support ring frame 11, a support leaf frame 73 fixedly connected to the air induction tube 71, and a support leaf frame 73 installed on the support leaf frame A rotating motor 75 is installed in the frame 73, and a trigger switch 74 matching the alarm body 12 is installed at the top of the rotating motor 75, and an air induced blade 72 is installed at the bottom of the rotating motor 75; and the air induced blade 72 is a trumpet-shaped structure, which can significantly increase the air inlet area of ​​the air suction port, so that more air can enter the alarm body 12, which can improve the accuracy and sensitivity of detection. At the same time, it can prevent large particles from directly entering the alarm body 12, extend the service life of the alarm body 12, and reduce the possibility of false alarms.

[0042] The control assembly 3 includes a flame detector 31 and a controller 36 respectively fixed to the outside of the support ring frame 11 and an ear hook 34 fixed to the bottom of the arc frame 27, and the flame detector 31 and the controller 36 are connected by wires. A telescope 35 is installed at one end of the controller 36, and the end of the telescope 35 away from the controller 36 is plugged and connected to the bottom of the ear hook 34. The outside of the support ring frame 11 is provided with a guide groove 32 for the movement of the arc frame 27, which is communicated with the inside of the guide groove 26. A guide shaft 33 is rotatably connected in the arc frame 27, and the guide shaft 33 is located in the guide groove 32; the support assembly 4 includes a rotating column 43 sleeved on the bottom of the ear plate frame 25 and an arc frame 27 rotatably connected in the guide groove 26 and matched with the arc frame 27. Block 47, a rotating shaft 48 is installed in the guide groove 26, and the rotating shaft 48 is sleeved in the arc block 47, a rotating groove 45 is opened in the guide groove 26, and the rotating groove 45 is located below the arc block 47, one end of the rotating column 43 extends into the rotating groove 45 and is fixed with a support ring 46, a limiting component 5 for connection is provided between the support ring 46 and the arc block 47, and a shelf box door 44 is hinged on the side of the support ring frame 11 close to the controller 36; the support assembly 4 also includes a support column 41 fixed in the ring groove 21, the support column 41 is slidably connected in the ring frame 23, and a support spring 42 is also commonly connected between the top of the ring frame 23 and the top wall inside the ring groove 21, and the support spring 42 is sleeved on the outside of the support column 41.

[0043] The limiting assembly 5 includes two limiting plates 54 fixedly connected to the outside of the support ring 46 and a limiting block 53 fixedly connected to the bottom of the arc block 47, and the limiting block 53 is plugged in and out between the two limiting plates 54, and a connecting seat 51 is installed between the top of the arc block 47 and the guide groove 26, and an ejection spring 52 is commonly connected between the two connecting seats 51.

[0044] The range assembly 6 includes a rotating frame 61 fixed on the top of the supporting ring frame 11 and a positioning groove 62 opened at the bottom of the mounting frame 1 for the rotating frame 61 to rotate. A first gear 63 is fixed to the top of the rotating frame 61, and the first gear 63 is located in the positioning groove 62. A mounting barrel box 64 communicating with the interior of the positioning groove 62 is fixed to the outside of the mounting frame 1. A control motor 66 is installed on the outside of the mounting barrel box 64. A second gear 65 is fixed to the bottom of the control motor 66, and the second gear 65 is located in the mounting barrel box 64 and meshes with the first gear 63.

[0045] When in use;

[0046] Step 1: First, the flame detector 31 detects the surrounding conditions and transmits the detection signal to the controller 36 to determine whether the telescopic device 35 is retracted. The second gear 65 is driven by the control motor 66 to rotate in the installation barrel box 64 and the positioning groove 62. Then the second gear 65 is meshed with the first gear 63 to drive the first gear 63 and the rotating frame 61 to rotate along the positioning groove 62. At this time, the rotation of the rotating frame 61 drives the support ring frame 11 to rotate along the bottom of the installation frame 1, and the rotation of the support ring frame 11 drives the alarm body 12, the control component 3, the support component 4, the limiting component 5 and the induced draft component 7 to move in a circle along the bottom of the installation frame 1. Moreover, the flame detector 31 can cover a wider area under the rotation of the support ring frame 11, ensuring comprehensive monitoring of the surrounding environment, effectively reducing these blind spots, improving the integrity of monitoring, and thus expanding the monitoring range, so that the flame detector 31 can find the fire source faster and improve the response speed of the alarm system.

[0047] Step 2: The flame detector 31 detects flames in the surroundings and transmits the detection signal to the controller 36, so that the controller 36 is used to control the telescopic device 35 to extend and retract. Then, the end of the telescopic device 35 close to the arc frame 27 moves out along the ear hook 34. At this time, the traction spring 28 elastically pulls the arc frame 27 and the spring seat 29 installed on the arc frame 27, so that the arc frame 27 moves upward along the outside of the support ring frame 11, and the arc frame 27 is guided and moved along the guide groove 32 under the action of the guide shaft 33, so that the arc frame 27 moves in the guide groove 32 like a lever, and the part of the arc frame 27 in the guide groove 32 and the guide groove 26 moves downward and pushes the arc block 47 to rotate along the outside of the rotating shaft 48, so that the arc block 47 moves in the guide groove 26 like a lever along the outside of the rotating shaft 48, and the ejection spring 52 increases the elastic force support of the arc block 47 to ensure that the arc block 47 and the arc frame 27 can be stably contacted, so that the arc frame 2 The arc block 47 is squeezed to rotate it along the outside of the rotating shaft 48. As the arc block 47 moves, the limiting block 53 slides out of the position between the two limiting plates 54. Then, the elastic force of the support spring 42 pushes the ring frame 23 downward, so that the ring frame 23 moves downward along the ring groove 21 and drives the alarm body 12 to move downward synchronously. In this process, the ear plate 24 contacts and pushes the ear plate frame 25, so that the ear plate frame 25 and the rotating column 43 rotate along the guide groove 26 and the rotating groove 45, which is used to change the position of the support ring 46 in the rotating groove 45. Then, the alarm body 12 extends downward along the supporting ring frame 11, and the trigger switch on the top of the alarm body 12 contacts and triggers the alarm, which is convenient for the alarm body 12 to effectively capture the flame and heat in the initial stage, reduce the occurrence of missed alarms of the alarm body 12, and make the alarm body 12 respond to the initial stage of combustion in time, thereby increasing the safety of building construction.

[0048] The third step: the alarm body 12 then moves downward along the support ring frame 11, so that the alarm body 12 is close to the area where smoke is generated. Then, the alarm body 12 collides with the trigger switch 74 under the elastic push of the support spring 42, thereby triggering the rotation of the rotating motor 75. At this time, the rotation of the rotating motor 75 drives the induced draft blades 72 to rotate in the induced draft tube 71, so that the smoke can be actively sucked into the induced draft tube 71 when floating upward, which is conducive to the smoke inside the induced draft tube 71 being captured by the alarm body 12, and the detection requirements of the alarm body 12 can be quickly met, thereby realizing timely alarm, so that the alarm body 12 can cover a wider area, thereby improving the efficiency of fire monitoring.

[0049] The above only describes certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, a person skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A safety alarm for construction, comprising an alarm body (12) and a support ring frame (11), wherein the support ring frame (11) is used to movably mount the alarm body (12) inside the support ring frame, and a trigger switch of the alarm body (12) is located outside the support ring frame (11), a mounting frame (1) is mounted on the top of the support ring frame (11), and the mounting frame (1) is used to mount the support ring frame (11) on a wall, characterized in that: A trigger assembly (2) is used to trigger an alarm by placing an alarm body (12) in a supporting ring frame (11), and to cause the alarm body (12) to detect and alarm a newly formed fire source or smoke generating area. The trigger assembly (2) comprises a ring frame (23) sleeved on the outside of the alarm body (12) and a ring groove (21) provided in the supporting ring frame (11) for the ring frame (23) to move. Two symmetrical ear plates (24) are fixed to the outside of the ring frame (23). Two guide grooves (26) are symmetrically provided in the ring groove (21) for the two ear plates (24) to move. An ear plate frame (25) matching with the ear plate (24) is installed in the guide groove (26). A support assembly (4) for connection is provided between the guide groove (26) and the ear plate frame (25). The supporting ring frame (11) is provided with a An arc frame (27) is provided, and the arc frame (27) is used to cooperate with the support component (4) and the ear plate frame (25); a spring seat (29) is installed between the support ring frame (11) and the arc frame (27), and a traction spring (28) is commonly connected between the two spring seats (29); a control component (3) is provided on the support ring frame (11) for monitoring the fire source and triggering the arc frame (27) to cooperate with the alarm body (12); a range component (6) is provided on the mounting frame (1) for rotating the support ring frame (11) and the control component (3) along the bottom of the mounting frame (1); an air induction component (7) that cooperates with the support component (4) is provided below the support ring frame (11) to inhale smoke at the bottom of the support ring frame (11) to cooperate with the alarm body (12); The control assembly (3) comprises a flame detector (31) and a controller (36) respectively fixed to the outside of the support ring frame (11) and an ear hook (34) fixed to the bottom of the arc frame (27), and the flame detector (31) and the controller (36) are connected by wires, a retractor (35) is installed at one end of the controller (36), and the end of the retractor (35) away from the controller (36) is plug-in-connected to the bottom of the ear hook (34), the outside of the support ring frame (11) is provided with a guide groove (32) which is in communication with the inside of the guide groove (26) and for the arc frame (27) to move, and a guide shaft (33) is rotatably connected inside the arc frame (27), and the guide shaft (33) is located in the guide groove (32); The range assembly (6) comprises a rotating frame (61) fixed on the top of the supporting ring frame (11) and a positioning groove (62) provided at the bottom of the mounting frame (1) for the rotating frame (61) to rotate, a first gear (63) being fixed on the top of the rotating frame (61), and the first gear (63) being located in the positioning groove (62), a mounting barrel box (64) being fixed on the outside of the mounting frame (1) and communicating with the inside of the positioning groove (62), a control motor (66) being installed on the outside of the mounting barrel box (64), a second gear (65) being fixed on the bottom of the control motor (66), and the second gear (65) being located in the mounting barrel box (64) and meshing with the first gear (63); The induced draft assembly (7) comprises an induced draft tube (71) fixed to the bottom of the supporting ring frame (11), a supporting blade frame (73) fixedly connected to the induced draft tube (71), and a rotating motor (75) installed in the supporting blade frame (73), wherein a trigger switch member (74) matching with the alarm body (12) is installed at the top end of the rotating motor (75), and an induced draft blade (72) is installed at the bottom end of the rotating motor (75).

2. A safety alarm for construction according to claim 1, characterized in that: An elastic sleeve (22) is also fixed inside the ring frame (23), and the elastic sleeve (22) is snugly sleeved on the outside of the alarm body (12), and the elastic sleeve (22) is elastic.

3. A safety alarm for construction according to claim 1, characterized in that: The support assembly (4) comprises a rotating column (43) sleeved on the bottom of the ear plate frame (25) and an arc block (47) rotatably connected in the guide groove (26) and matched with the arc frame (27); a rotating shaft (48) is installed in the guide groove (26), and the rotating shaft (48) is sleeved in the arc block (47); a rotating groove (45) is opened in the guide groove (26), and the rotating groove (45) is located below the arc block (47); one end of the rotating column (43) extends into the rotating groove (45) and is fixed with a supporting ring (46); a limiting assembly (5) for connection is provided between the supporting ring (46) and the arc block (47); a shelf box door (44) is hingedly connected to a side of the support ring frame (11) close to the controller (36).

4. A safety alarm for construction according to claim 1, characterized in that: The support assembly (4) further comprises a support column (41) fixed in the annular groove (21), the support column (41) being slidably connected in the annular frame (23), a support spring (42) being commonly connected between the top of the annular frame (23) and the inner top wall of the annular groove (21), and the support spring (42) being sleeved on the outside of the support column (41).

5. A safety alarm for construction according to claim 3, characterized in that: The limiting assembly (5) comprises two limiting plates (54) fixedly connected to the outside of the support ring (46) and a limiting block (53) fixedly connected to the bottom of the arc block (47), and the limiting block (53) is pluggably connected between the two limiting plates (54), and a connecting seat (51) is installed between the top of the arc block (47) and the guide groove (26), and an ejection spring (52) is commonly connected between the two connecting seats (51).

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