An engineering construction site safety alarm system

Abstract

The present invention relates to the technical field of engineering construction safety, and particularly relates to a safety alarm system for an engineering construction site, including: a safety hook, a safety rope, a first connecting arm, a second connecting arm, a telescopic mechanism, a pressure detection module, and a controller. The first connecting arm is hinged to the second connecting arm, the first connecting arm is connected to the safety hook, and the second connecting arm is connected to the safety rope. One end of the telescopic mechanism is hinged to the first connecting arm, and the other end is hinged to the second connecting arm. The pressure detection module is used to detect the acting force between the telescopic mechanism and the first connecting arm and / or between the telescopic mechanism and the second connecting arm. When the acting force detected by the pressure detection module is less than the standard acting force at the corresponding extended length, the controller issues a safety hazard alarm prompt. It can conduct targeted supervision for each construction worker, and can continuously evaluate and monitor the safety protection measures of construction workers during the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction safety, and more particularly, to a safety alarm system for an engineering construction site. Background Art

[0002] During the engineering construction process, construction safety has always been the focus of attention. Due to the diverse and usually complex situations at the construction site, the management of construction safety mostly relies on the supervision and on-site control of safety officers, which not only brings a huge burden to the work of safety officers, but also easily leads to supervision loopholes.

[0003] In view of this, this application is specifically proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a safety alarm system for an engineering construction site, which can conduct targeted supervision on each construction worker, continuously evaluate and monitor the safety protection measures of construction workers during the construction process, and ensure that the safety protection measures are in a normal state as much as possible, which has a positive significance for further reducing the safety risks of construction workers.

[0005] The embodiments of the present invention are implemented as follows:

[0006] A safety alarm system for an engineering construction site includes: a safety hook, a safety rope, a first connecting arm, a second connecting arm, a telescopic mechanism, a pressure detection module, and a controller.

[0007] One end of the safety rope is connected to the safety hook.

[0008] One end of the first connecting arm is hinged to one end of the second connecting arm. The end of the first connecting arm away from the second connecting arm is connected to the safety hook. The end of the second connecting arm away from the first connecting arm is connected to the safety rope. The connection point between the second connecting arm and the safety rope is spaced from the safety hook.

[0009] One end of the telescopic mechanism is hinged to the first connecting arm, and the other end is hinged to the second connecting arm.

[0010] The hinged ends of the first connecting arm and the second connecting arm are provided with a reset elastic member, and the reset elastic member is used to drive the first connecting arm and the second connecting arm to approach each other.

[0011] The pressure detection module is used to detect the acting force between the telescopic mechanism and the first connecting arm, and / or between the telescopic mechanism and the second connecting arm.

[0012] The telescopic mechanism and the pressure detection module are both electrically connected to the controller. The controller is used to control the telescopic mechanism to switch from the retracted state to the extended state according to a preset frequency, and collect the extended length-force data by using the pressure detection module. When the force detected by the pressure detection module is less than the standard force at the corresponding extended length, the controller issues a safety hazard alarm prompt.

[0013] Further, a mating ring is fixedly connected to one end of the first connecting arm away from the second connecting arm, and the mating ring is buckled with the safety hook.

[0014] Further, the telescopic mechanism includes: an outer cylinder, a telescopic device, a sliding member, and a driving rod.

[0015] Both ends of the outer cylinder are closed structures. The telescopic device is arranged in the outer cylinder and located at one end of the outer cylinder, and the telescopic part of the telescopic device is arranged towards the other end of the outer cylinder.

[0016] The sliding member is slidably fitted in the outer cylinder, and there is a sliding seal between the sliding member and the outer cylinder.

[0017] The driving rod is fixedly connected to the side of the sliding member away from the telescopic device, the driving rod extends along the axial direction of the outer cylinder and penetrates through the end wall of the outer cylinder, and there is a sliding seal between the driving rod and the end wall of the outer cylinder.

[0018] One of the end of the outer cylinder away from the driving rod and the end of the driving rod away from the sliding member is hinged to the first connecting arm, and the other is hinged to the second connecting arm.

[0019] A first axial blind hole is provided on the side of the sliding member close to the driving rod, a second axial blind hole is provided on the side of the sliding member close to the telescopic device, and the sliding member is also provided with a radial communication hole for communicating the first axial blind hole and the second axial blind hole.

[0020] The sliding member is also provided with a mounting blind hole, which extends axially from the side of the sliding member close to the telescopic device towards the side where the driving rod is located, and the mounting blind hole extends to communicate with the radial communication hole and further extends towards the driving rod.

[0021] An adjusting column is slidably fitted in the mounting blind hole, and the outer diameter of the adjusting column is adapted to the aperture of the mounting blind hole. The adjusting column is provided with a radial through hole, and an adjusting elastic member is also arranged between the adjusting column and the bottom of the mounting blind hole. In the natural state, the adjusting elastic member pushes the adjusting column out of the mounting blind hole partially, so that the radial through hole moves to the side of the radial communication hole close to the telescopic device, and further blocks the radial communication hole.

[0022] The pressure detection module is installed on the side of the telescopic part close to the sliding part, so that when the telescopic device uses the telescopic part to push the sliding part, the telescopic part can push the adjusting column through the pressure detection module, and then push the adjusting column completely into the installation blind hole, so that the radial conducting hole is matched with the radial connecting hole to make the radial connecting hole conductive.

[0023] The diameter of the pressure detection module is larger than the aperture of the installation blind hole.

[0024] Furthermore, a vent hole is provided at the bottom of the installation blind hole, and the vent hole extends and penetrates to a side surface of the sliding member close to the telescopic device.

[0025] Furthermore, a pressure balance hole is provided on the side wall of the outer cylinder. When the telescopic device is in a retracted state, the pressure balance hole is located on a side of the sliding member close to the telescopic device.

[0026] Furthermore, the controller is also used to determine whether the pressure detection module is in contact with the sliding member based on the pressure data detected by the pressure detection module.

[0027] When the controller determines that the pressure detection module is separated from the sliding member, the controller issues a safety status alarm prompt.

[0028] The beneficial effects of the technical solution of the embodiment of the present invention include:

[0029] (1) The connection strength between the safety rope and the safety hook can be tested at a preset frequency according to actual needs to ensure that the safety protection facilities are working properly.

[0030] (2) It can promptly issue alarms for safety hooks and safety ropes that have connection strength problems (i.e., safety hazards).

[0031] (3) The structure formed by the first connecting arm, the second connecting arm and the telescopic mechanism can reinforce the connection strength between the safety rope and the safety hook, further improving the overall connection reliability between the safety hook and the safety rope.

[0032] (4) During use, when the connection strength test is not performed, the telescopic mechanism is in a retracted state, and the first connecting arm and the second connecting arm are close to each other, so that the safety rope corresponding to the S segment can be retracted, thereby reducing the falling length of the safety rope, thereby reducing the risk of the safety rope accidentally tripping the construction workers, and further improving the safety of use.

[0033] In general, the construction site safety alarm system provided by the embodiment of the present invention can carry out targeted supervision of each construction worker, and can continuously evaluate and monitor the safety measures of the construction workers during the construction process, ensuring that the safety measures are in a normal state as much as possible, which is of positive significance for further reducing the safety risks of construction workers. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic diagram of the overall cooperation of the safety alarm system at the construction site of the project provided by the embodiment of the present invention (when the telescopic mechanism is in the retracted state);

[0036] Figure 2 It is a schematic diagram of the overall cooperation of the safety alarm system at the construction site of the project provided by the embodiment of the present invention (when the telescopic mechanism is in the extended state);

[0037] Figure 3 It is a schematic diagram of the composition of the telescopic mechanism (when the telescopic mechanism is in the retracted state);

[0038] Figure 4 For Figure 3 It is a schematic diagram of the structure at the sliding member in

[0039] Figure 5 It is a schematic diagram of the composition of the telescopic mechanism (when the telescopic mechanism is in the extended state);

[0040] Figure 6 It is a schematic diagram of the state when the sliding member of the telescopic mechanism is separated from the pressure detection module;

[0041] Figure 7 For Figure 6 It is a schematic diagram of the structure at the sliding member in

[0042] Description of the Reference Numerals:

[0043] Safety hook 100; safety rope 200; first connecting arm 300; mating ring 310; second connecting arm 400; telescopic mechanism 500; outer cylinder 510; air pressure balance hole 511; telescopic device 520; telescopic part 521; sliding member 530; first axial blind hole 531; second axial blind hole 532; radial communication hole 533; mounting blind hole 534; adjusting column 540; radial through hole 541; adjusting elastic member 542; driving rod 550; pressure detection module 600. Detailed Embodiments

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the accompanying drawings herein can be arranged and designed in a variety of different configurations.

[0045] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0047] Terms such as "first" and "second" are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0048] In addition, terms such as "parallel" and "perpendicular" do not mean that the components are required to be absolutely parallel or perpendicular, but can be slightly inclined. For example, "parallel" only means that its direction is more parallel relative to "perpendicular", and does not mean that the structure must be completely parallel, but can be slightly inclined.

[0049] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement", "installation", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Please refer to Figure 1 - Figure 2 , this embodiment provides a safety alarm system for an engineering construction site, and the system includes: a safety hook 100, a safety rope 200, a first connecting arm 300, a second connecting arm 400, a telescopic mechanism 500, a pressure detection module 600, and a controller (not shown in the figure).

[0051] One end of the safety rope 200 is connected to the safety hook 100.

[0052] One end of the first connecting arm 300 is hinged to one end of the second connecting arm 400. The end of the first connecting arm 300 away from the second connecting arm 400 is connected to the safety hook 100. The end of the second connecting arm 400 away from the first connecting arm 300 is connected to the safety rope 200. The connection point between the second connecting arm 400 and the safety rope 200 is spaced from the safety hook 100.

[0053] One end of the telescopic mechanism 500 is hinged to the first connecting arm 300, and the other end is hinged to the second connecting arm 400.

[0054] A reset elastic member (not shown in the figure) is provided at the hinged end of the first connecting arm 300 and the second connecting arm 400. The reset elastic member is used to drive the first connecting arm 300 and the second connecting arm 400 to approach each other.

[0055] The pressure detection module 600 is used to detect the acting force between the telescopic mechanism 500 and the first connecting arm 300 and / or between the telescopic mechanism 500 and the second connecting arm 400.

[0056] Both the telescopic mechanism 500 and the pressure detection module 600 are electrically connected to the controller.

[0057] Under normal conditions, the telescopic mechanism 500 is in a retracted state (i.e., a contracted state), the length of the telescopic mechanism 500 is in the shortest state, the distance between the first connecting arm 300 and the second connecting arm 400 is the smallest, and the part of the safety rope 200 between the safety hook 100 and the second connecting arm 400 (such as Figure 1 shown as section S) is in a slack state.

[0058] The controller is used to control the telescopic mechanism 500 to switch from the retracted state to the extended state according to a preset frequency (the specific frequency can be flexibly set according to actual needs). During the process of the telescopic mechanism 500 extending, the pressure detection module 600 is used to collect the extension length - acting force data, that is, to collect the magnitude of the acting force detected by the pressure detection module 600 corresponding to different extended lengths of the telescopic mechanism 500.

[0059] As the extension length of the telescopic mechanism 500 continuously increases, the safety rope 200 in section S is gradually tightened. During this process, the acting force detected by the pressure detection module 600 will gradually increase. When the connection strength between the safety hook 100 and the safety rope 200 meets the requirements, the acting force detected by the pressure detection module 600 at different extension lengths is used as the standard acting force.

[0060] If the following situation occurs: during the extension of the telescopic mechanism 500, the acting force detected by the pressure detection module 600 is less than the standard acting force at the corresponding extended length. At this time, it indicates that there is a problem with the connection strength between the safety rope 200 and the safety hook 100, and the controller will issue a safety hazard alarm prompt.

[0061] In order to improve the alarm accuracy, each connection part between the safety rope 200 and the safety hook 100 can also be identified, and the corresponding pressure detection module 600 can be made to correspond one by one. In this way, the specific location where the connection strength has a problem can be determined according to the pressure detection module 600 that shows the situation of "the acting force detected by the pressure detection module 600 is less than the standard acting force at the corresponding extended length".

[0062] Through this design, it has at least the following beneficial effects: (1) The connection strength between the safety rope 200 and the safety hook 100 can be detected according to the preset frequency as needed to ensure the normal operation of the safety protection facilities; (2) It can promptly give an alarm prompt for the safety hook 100 and the safety rope 200 where the connection strength has a problem (i.e., there is a safety hazard); (3) The structure composed of the first connecting arm 300, the second connecting arm 400, and the telescopic mechanism 500 can strengthen the connection strength between the safety rope 200 and the safety hook 100, further improving the overall connection reliability between the safety hook 100 and the safety rope 200; (4) During use, when the connection strength is not detected, the telescopic mechanism 500 is in the retracted state, and the first connecting arm 300 and the second connecting arm 400 are close to each other, which can gather the safety rope 200 corresponding to the S section, thereby reducing the falling length of the safety rope 200, and thus reducing the risk of the safety rope 200 accidentally tripping the construction worker, further improving the use safety.

[0063] Generally speaking, the safety alarm system for the construction site provided in this embodiment can conduct targeted supervision for each construction worker, continuously evaluate and monitor the safety protection measures of the construction workers during the construction process, and ensure that the safety protection measures are in a normal state as much as possible, which has a positive significance for further reducing the safety risks of construction workers.

[0064] In this embodiment, a mating ring 310 is fixedly connected to the end of the first connecting arm 300 away from the second connecting arm 400, and the mating ring 310 is buckled with the safety hook 100. The end of the second connecting arm 400 away from the first connecting arm 300 is fixedly connected to the safety rope 200.

[0065] Further, please combine Figure 1 - Figure 7 , the telescopic mechanism 500 includes: an outer cylinder 510, a telescopic device 520, a sliding member 530, and a driving rod 550.

[0066] Both ends of the outer cylinder 510 are closed structures. The telescopic device 520 is arranged in the outer cylinder 510 and located at one end of the outer cylinder 510. The telescopic part 521 of the telescopic device 520 is arranged towards the other end of the outer cylinder 510. The telescopic device 520 can adopt a cylinder or a linear actuator, and is not limited thereto.

[0067] The sliding part 530 is slidably fitted in the outer cylinder 510, and there is a sliding seal between the sliding part 530 and the outer cylinder 510.

[0068] The driving rod 550 is fixedly connected to the side of the sliding part 530 away from the telescopic device 520. The driving rod 550 extends along the axial direction of the outer cylinder 510 and penetrates through the end wall of the outer cylinder 510. There is a sliding seal between the driving rod 550 and the end wall of the outer cylinder 510.

[0069] One of the end of the outer cylinder 510 away from the driving rod 550 and the end of the driving rod 550 away from the sliding part 530 is hinged to the first connecting arm 300, and the other is hinged to the second connecting arm 400. Optionally, in this embodiment, the telescopic device 520 is located at one end of the outer cylinder 510 close to the first connecting arm 300, the sliding part 530 is located on the side of the telescopic device 520 close to the second connecting arm 400. The driving rod 550, the sliding part 530 and the outer cylinder 510 are coaxially arranged. The end of the outer cylinder 510 away from the driving rod 550 is hinged to the first connecting arm 300, and the end of the driving rod 550 away from the telescopic device 520 is hinged to the second connecting arm 400.

[0070] On the side of the sliding part 530 close to the driving rod 550, a first axial blind hole 531 is formed, which extends along the axial direction of the outer cylinder 510 from the surface of the sliding part 530 close to the driving rod 550. On the side of the sliding part 530 close to the telescopic device 520, a second axial blind hole 532 is formed, which extends along the axial direction of the outer cylinder 510 from the surface of the sliding part 530 close to the telescopic device 520. The sliding part 530 is also provided with a radial communication hole 533 for communicating the first axial blind hole 531 and the second axial blind hole 532. The radial communication hole 533 extends along the radial direction of the outer cylinder 510, and the radial communication hole 533 is located inside the sliding part 530.

[0071] The sliding part 530 is also provided with a mounting blind hole 534, which extends from the surface of the sliding part 530 close to the telescopic device 520 along the axial direction of the outer cylinder 510 towards the inside of the sliding part 530 (i.e., towards the side where the driving rod 550 is located). During the extension of the mounting blind hole 534, it communicates with the radial communication hole 533 and further extends towards the direction where the driving rod 550 is located.

[0072] An adjustment post 540 is in sliding fit with an installation blind hole 534, and the outer diameter of the adjustment post 540 is adapted to the aperture of the installation blind hole 534. A radial guide through hole 541 is formed in the adjustment post 540, and an adjustment elastic member 542 is further provided between the bottom of the adjustment post 540 and the bottom of the installation blind hole 534. In the natural state, the adjustment elastic member 542 pushes a part of the adjustment post 540 out of the installation blind hole 534. At this time, the radial guide through hole 541 of the adjustment post 540 moves to the side of the radial communication hole 533 close to the telescopic device 520, so that the radial guide through hole 541 and the radial communication hole 533 are staggered from each other, and the radial communication hole 533 is thus blocked by the adjustment post 540.

[0073] The pressure detection module 600 is installed on the side of the telescopic part 521 of the telescopic device 520 close to the sliding member 530, that is, installed at the end of the telescopic part 521 of the telescopic device 520. Among them, the diameter of the pressure detection module 600 is larger than the aperture of the installation blind hole 534.

[0074] When the connection strength test is not carried out, the telescopic device 520 is in the retracted state. In this state, the sliding member 530 is in contact with the pressure detection module 600, that is, the sliding member 530 is indirectly in contact with the telescopic part 521 of the telescopic device 520 through the pressure detection module 600. The pressure detection module 600 pushes the entire adjustment post 540 into the installation blind hole 534 and fits with the surface of the sliding member 530. At this time, the radial guide through hole 541 of the adjustment post 540 is aligned with the radial communication hole 533 so that the radial communication hole 533 is in a conducting state, that is, the gas in the radial communication hole 533 can pass through the adjustment post 540 through the radial guide through hole 541.

[0075] When the connection strength test is carried out, the telescopic device 520 starts to extend. The telescopic part 521 pushes the sliding member 530 through the pressure detection module 600. During this process, the adjustment post 540 is always completely located in the installation blind hole 534, that is, the radial communication hole 533 is always in a conducting state. When the sliding member 530 moves towards the end of the outer cylinder 510 away from the telescopic device 520, the air on the side of the sliding member 530 away from the telescopic device 520 sequentially passes through the first axial blind hole 531, the radial communication hole 533, and the second axial blind hole 532, and enters the side of the sliding member 530 close to the telescopic device 520, so that the sliding member 530 can smoothly move along the outer cylinder 510, thereby enabling the overall telescopic mechanism 500 to extend smoothly.

[0076] After the connection strength is detected and the telescopic device 520 starts to retract and reset, during the process, the telescopic part 521 and the pressure detection module 600 gradually move towards the end where the telescopic device 520 is located. Under the action of the restoring force of the reset elastic member, the first connecting arm 300 and the second connecting arm 400 have a tendency to move closer to each other. This can prompt the driving rod 550 to push the sliding member 530 to reset synchronously, and keep the sliding member 530 in contact with the pressure detection module 600 during the reset process (the retraction speed of the telescopic part 521 of the telescopic device 520 can be set to be less than the speed at which the first connecting arm 300 and the second connecting arm 400 move closer to each other). In this way, during the reset process, the adjusting column 540 also always remains completely within the installation blind hole 534, and the radial communication hole 533 is always in a conductive state. The air on the side of the sliding member 530 close to the telescopic device 520 can sequentially enter the side of the sliding member 530 far from the telescopic device 520 through the second axial blind hole 532, the radial communication hole 533, and the first axial blind hole 531, so that the sliding member 530 can be reset smoothly.

[0077] When there is a risk of a construction worker falling, the safety measures formed by the safety rope 200 and the safety hook 100 play a role in preventing the construction worker from falling, thus ensuring the safety of the construction worker. At this time, the safety rope 200 is tightened due to the force from the construction worker, which causes the S-section of the safety rope 200 to be stretched under tension. At the same time, the first connecting arm 300 and the second connecting arm 400 are also pulled apart, and the angle (spacing) between the first connecting arm 300 and the second connecting arm 400 increases. The second connecting arm 400 exerts a pulling force on the sliding member 530 through the driving rod 550, so that the sliding member 530 is separated from the pressure detection module 600. Once the sliding member 530 is separated from the pressure detection module 600, the adjusting column 540 is partially ejected from the installation blind hole 534 by the adjusting elastic member 542, so that the radial communication hole 533 is blocked. In this way, the air on the side of the sliding member 530 far from the telescopic device 520 cannot enter the side of the sliding member 530 close to the telescopic device 520, and the movement of the sliding member 530 will be hindered. In this way, the force from the construction worker is smoothly buffered, and the discomfort caused to the construction worker by the pulling force of the safety rope 200 can be alleviated.

[0078] At the same time, when the construction workers are at risk of falling, the sliding member 530 and the pressure detection module 600 will separate, which will cause the pressure detected by the pressure detection module 600 to change. Conversely, it is possible to determine whether the construction workers have been at risk of falling by monitoring whether the pressure detected by the pressure detection module 600 changes when the connection strength test is not performed. That is, the controller can also be used to determine whether the pressure detection module 600 is in contact with the sliding member 530 based on the pressure data detected by the pressure detection module 600. When the controller determines that the pressure detection module 600 is separated from the sliding member 530, the controller issues a safety status alarm.

[0079] When a safety situation alarm appears, it means that the corresponding construction worker is at risk of falling. This allows the safety status of the construction workers to be monitored proactively, making it easy to promptly identify construction workers who have experienced safety risks, thereby helping to optimize and improve the corresponding construction safety management work in a targeted manner.

[0080] Optionally, a vent hole (not shown) is opened at the bottom of the mounting blind hole 534 , and the vent hole extends and penetrates to a side surface of the sliding member 530 close to the telescopic device 520 , so as to facilitate smooth movement of the adjustment column 540 .

[0081] Optionally, a pressure balance hole 511 is provided on the side wall of the outer cylinder 510. When the telescopic device 520 is in the retracted state, the sliding member 530 fits with the pressure detection module 600. At this time, the pressure balance hole 511 is located on the side of the sliding member 530 close to the telescopic device 520. The pressure balance hole 511 can help balance the air pressure on the side of the sliding member 530 close to the telescopic device 520, so that the movement of the sliding member 530 is smoother.

[0082] To sum up, the construction site safety alarm system provided by the embodiment of the present invention can carry out targeted supervision of each construction worker, and can continuously evaluate and monitor the safety measures of the construction workers during the construction process, ensuring that the safety measures are in a normal state as much as possible, which is of positive significance for further reducing the safety risks of construction workers.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction site safety alarm system, characterized in that: include: Safety hook, safety rope, first connecting arm, second connecting arm, telescopic mechanism, pressure detection module and controller; One end of the safety rope is connected to the safety hook; One end of the first connecting arm is hinged to one end of the second connecting arm, one end of the first connecting arm away from the second connecting arm is connected to the safety hook, one end of the second connecting arm away from the first connecting arm is connected to the safety rope, and the connection point between the second connecting arm and the safety rope is spaced apart from the safety hook; The hinged ends of the first connecting arm and the second connecting arm are equipped with a reset elastic member, and the reset elastic member is used to drive the first connecting arm and the second connecting arm to move closer to each other; The telescopic mechanism comprises: an outer cylinder, a telescopic device, a sliding member and a driving rod; Both ends of the outer cylinder are closed structures, the telescopic device is arranged in the middle of the outer cylinder and located at one end of the outer cylinder, and the telescopic part of the telescopic device is arranged toward the other end of the outer cylinder; The sliding member is slidably fitted in the outer cylinder, and a sliding seal is provided between the sliding member and the outer cylinder; The driving rod is fixedly connected to a side of the sliding member away from the telescopic device, the driving rod extends along the axial direction of the outer cylinder and penetrates the end wall of the outer cylinder, and a sliding seal is formed between the driving rod and the end wall of the outer cylinder; One of the end of the outer cylinder away from the driving rod and the end of the driving rod away from the sliding member is hinged to the first connecting arm, and the other is hinged to the second connecting arm; A first axial blind hole is formed on a side of the sliding member close to the driving rod, a second axial blind hole is formed on a side of the sliding member close to the telescopic device, and a radial connecting hole is formed on the sliding member for connecting the first axial blind hole with the second axial blind hole; The sliding member is further provided with a mounting blind hole, the mounting blind hole extending from a side of the sliding member close to the telescopic device along its axial direction toward a side where the driving rod is located, the mounting blind hole extending to communicate with the radial connecting hole and further extending toward the driving rod; An adjusting column is slidably fitted in the mounting blind hole, and the outer diameter of the adjusting column is adapted to the hole diameter of the mounting blind hole; a radial conducting hole is provided in the adjusting column, and an adjusting elastic member is further provided between the adjusting column and the bottom of the mounting blind hole, and in a natural state, the adjusting elastic member partially pushes the adjusting column out of the mounting blind hole, so that the radial conducting hole moves to the side of the radial communicating hole close to the telescopic device, thereby blocking the radial communicating hole; The pressure detection module is installed on a side of the telescopic part close to the sliding member, so that when the telescopic device uses the telescopic part to push the sliding member, the telescopic part can push the adjustment column through the pressure detection module, and then push the adjustment column completely into the mounting blind hole, so that the radial conducting hole is matched with the radial communicating hole to make the radial communicating hole conductive; Wherein, the diameter of the pressure detection module is larger than the aperture of the mounting blind hole; The telescopic mechanism and the pressure detection module are both electrically connected to the controller; In a normal state, the telescopic mechanism is in a retracted state, and the portion of the safety rope between the safety hook and the second connecting arm is in a relaxed state; The controller is used to control the telescopic mechanism to switch from a retracted state to an extended state according to a preset frequency, and during the extension of the telescopic mechanism, the pressure detection module is used to collect extension length-force data; When the connection strength between the safety hook and the safety rope meets the requirements, the force detected by the pressure detection module at different extension lengths is used as the standard force; During a certain extension process of the telescopic mechanism, if the force detected by the pressure detection module is smaller than the standard force at the corresponding extension length, the controller issues a safety hazard alarm.

2. The construction site safety alarm system according to claim 1 is characterized in that: One end of the first connecting arm away from the second connecting arm is fixedly connected with a matching ring, and the matching ring is buckled with the safety hook.

3. The construction site safety alarm system according to claim 1 is characterized in that: A vent hole is provided at the bottom of the installation blind hole, and the vent hole extends and penetrates to a side surface of the sliding member close to the telescopic device.

4. The construction site safety alarm system according to claim 1 is characterized in that: A gas pressure balance hole is provided on the side wall of the outer cylinder. When the telescopic device is in a retracted state, the gas pressure balance hole is located on a side of the sliding member close to the telescopic device.

5. The construction site safety alarm system according to claim 1 is characterized in that: The controller is also used to determine whether the pressure detection module is in contact with the sliding member according to the pressure data detected by the pressure detection module; When the controller determines that the pressure detection module is separated from the sliding member, the controller issues a safety status alarm.

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